WO2024198251A1 - 电池单体、电池及用电装置 - Google Patents

电池单体、电池及用电装置 Download PDF

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Publication number
WO2024198251A1
WO2024198251A1 PCT/CN2023/118648 CN2023118648W WO2024198251A1 WO 2024198251 A1 WO2024198251 A1 WO 2024198251A1 CN 2023118648 W CN2023118648 W CN 2023118648W WO 2024198251 A1 WO2024198251 A1 WO 2024198251A1
Authority
WO
WIPO (PCT)
Prior art keywords
hole
holes
battery cell
isolation structure
electrode assembly
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2023/118648
Other languages
English (en)
French (fr)
Inventor
柯海波
毛国安
李全坤
黄守君
高凯
陈燕琳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Contemporary Amperex Technology Co Ltd
Original Assignee
Contemporary Amperex Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Contemporary Amperex Technology Co Ltd filed Critical Contemporary Amperex Technology Co Ltd
Priority to EP23929825.0A priority Critical patent/EP4618207A4/en
Priority to KR1020257026086A priority patent/KR20250130831A/ko
Priority to JP2025534477A priority patent/JP2026502102A/ja
Priority to CN202380054716.7A priority patent/CN119547236A/zh
Publication of WO2024198251A1 publication Critical patent/WO2024198251A1/zh
Priority to US19/277,420 priority patent/US20250349947A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10Primary casings; Jackets or wrappings
    • H01M50/14Primary casings; Jackets or wrappings for protecting against damage caused by external factors
    • H01M50/145Primary casings; Jackets or wrappings for protecting against damage caused by external factors for protecting against corrosion
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50Current conducting connections for cells or batteries
    • H01M50/572Means for preventing undesired use or discharge
    • H01M50/584Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/586Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries inside the batteries, e.g. incorrect connections of electrodes
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/05Accumulators with non-aqueous electrolyte
    • H01M10/052Li-accumulators
    • H01M10/0525Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/05Accumulators with non-aqueous electrolyte
    • H01M10/058Construction or manufacture
    • H01M10/0587Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10Primary casings; Jackets or wrappings
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10Primary casings; Jackets or wrappings
    • H01M50/102Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/103Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10Primary casings; Jackets or wrappings
    • H01M50/116Primary casings; Jackets or wrappings characterised by the material
    • H01M50/121Organic material
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10Primary casings; Jackets or wrappings
    • H01M50/116Primary casings; Jackets or wrappings characterised by the material
    • H01M50/124Primary casings; Jackets or wrappings characterised by the material having a layered structure
    • H01M50/1243Primary casings; Jackets or wrappings characterised by the material having a layered structure characterised by the internal coating on the casing
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10Primary casings; Jackets or wrappings
    • H01M50/131Primary casings; Jackets or wrappings characterised by physical properties, e.g. gas permeability, size or heat resistance
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204Racks, modules or packs for multiple batteries or multiple cells
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/244Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30Arrangements for facilitating escape of gases
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30Arrangements for facilitating escape of gases
    • H01M50/35Gas exhaust passages comprising elongated, tortuous or labyrinth-shaped exhaust passages
    • H01M50/358External gas exhaust passages located on the battery cover or case
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/471Spacing elements inside cells other than separators, membranes or diaphragms; Manufacturing processes thereof
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/471Spacing elements inside cells other than separators, membranes or diaphragms; Manufacturing processes thereof
    • H01M50/474Spacing elements inside cells other than separators, membranes or diaphragms; Manufacturing processes thereof characterised by their position inside the cells
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/471Spacing elements inside cells other than separators, membranes or diaphragms; Manufacturing processes thereof
    • H01M50/477Spacing elements inside cells other than separators, membranes or diaphragms; Manufacturing processes thereof characterised by their shape
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2200/00Safety devices for primary or secondary batteries
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00Batteries for particular applications
    • H01M2220/20Batteries in motive systems, e.g. vehicle, ship, plane
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00Energy generation of nuclear origin
    • Y02E30/30Nuclear fission reactors
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Definitions

  • the present application relates to the field of battery technology, and more specifically, to a battery cell, a battery, and an electrical device.
  • an isolation structure is provided between the electrode assembly and the outer shell, and a through hole is provided on the isolation structure. Powder on one side of the electrode assembly is easy to move from the through hole to between the isolation structure and the outer shell, causing a short circuit or corrosion of the battery cell.
  • the purpose of the embodiments of the present application is to provide a battery cell, a battery and an electrical device, aiming to solve the technical problems of short circuit or corrosion of battery cells in the prior art.
  • a battery cell comprising:
  • the housing having an inner cavity, the housing having a first wall;
  • An electrode assembly is disposed in the inner cavity
  • isolation structure being disposed between the first wall and the electrode assembly, and having a first through hole disposed on the isolation structure;
  • the insulating sheet includes a first portion, and the first portion covers the first through hole.
  • the electrode assembly is located inside the outer shell, and the isolation structure is located between the first wall of the outer shell and the electrode assembly. Since the insulating sheet covers the first through hole, the arrangement of the insulating sheet can reduce the probability of powder on one side of the electrode assembly moving through the first through hole to the first wall side to a certain extent, thereby improving the reliability of the battery cell.
  • the isolation structure is provided with a plurality of first through holes, and the insulating sheet covers all the first through holes.
  • the insulating sheet covers all the first through holes, the probability of powder on one side of the electrode assembly moving to the first wall side through the first through holes is reduced when there are multiple first through holes.
  • the number of insulating sheets is equal to the number of first through holes, the insulating sheets and the first through holes are arranged one-to-one, and the insulating sheets cover the corresponding first through holes; or, the number of insulating sheets is one, and one insulating sheet covers all the first through holes.
  • the first part is adhered to the opening of the first through hole.
  • the first part is fixed by gluing, so that the first part can better cover the first through hole.
  • the first portion is located on a side of the isolation structure facing the first wall.
  • the electrode assembly can be first connected to the isolation structure, and then the first part can be covered on the isolation structure, and the first part can be set on the side of the isolation structure facing the first wall, so as to facilitate the connection operation of the first part and the isolation structure after the isolation structure is connected to the electrode assembly.
  • the isolation structure includes a baffle plate and an insulating film
  • the baffle plate is located between the electrode assembly and the first wall
  • at least a portion of the insulating film is located between the electrode assembly and the first wall
  • the first through hole includes a first hole segment and a second hole segment that are relatively arranged and connected
  • the first hole segment is arranged on the insulating film
  • the second hole segment is arranged on the baffle plate
  • the first portion covers an opening on one side of the first hole segment away from the second hole segment or an opening on one side of the second hole segment away from the first hole segment.
  • the insulating film and the baffle plate can be positioned through the first hole segment and the second hole segment. Since the first part covers the side of the first hole segment away from the second hole segment, or the first part covers the side of the second hole segment away from the first hole segment, the first part can be connected after the insulating film and the baffle plate are connected.
  • the insulating film is folded and wrapped around the electrode assembly, and forms a first folded edge and a second folded edge that overlap each other on the side of the electrode assembly.
  • the insulating sheet includes a second part, the second part fixes the first folded edge and the second folded edge, and the first part is connected to the second part.
  • the insulating sheet can not only cover the first through hole, but also fix the first folded edge and the second folded edge. Since the insulating sheet includes the first part and the second part connected to each other, the contact area between the insulating sheet and the isolation structure is increased, thereby improving the connection stability between the insulating sheet and the isolation structure.
  • the second portion in a first direction, is spaced apart from at least one edge of the isolation structure in the first direction, and the first direction is parallel to a width direction of the first wall.
  • the second part is spaced apart from at least one edge of the isolation structure, that is, in the first direction, the size of the second part is smaller than the size of the isolation structure, it is convenient to flatly cover the second part on the insulating film and reduce the space occupied by the second part.
  • the distances between the second portion and two side edges of the isolation structure are equal.
  • the second portion is adhered to the middle region of the insulating film, so as to facilitate fixing the first folded edge and the second folded edge.
  • the width of the outer shell is W1
  • the width of the second portion is W2
  • the width of the second portion can be set according to the width of the shell, and the width of the second portion is sufficient to fix the first folded edge and the second folded edge.
  • the width of the second portion occupies a small space while satisfying the need to fix the first folded edge and the second folded edge.
  • the size of the second portion is 10 mm-80 mm.
  • the height of the second portion may be sufficient to fix the first folded edge and the second folded edge.
  • the size of the second portion is 15 mm-50 mm.
  • the height of the second part occupies a small space while satisfying the need to fix the first folded edge and the second folded edge.
  • both holes on the baffle plate are first hole segments; only two holes are provided on the insulating membrane, and both holes on the insulating membrane are second hole segments, and the two first hole segments are arranged opposite to the two second hole segments.
  • the baffle plate and the insulating sheet have a better blocking effect on the powder on one side of the electrode assembly.
  • the isolation structure further includes a support block, the baffle plate is arranged between the insulating film and the first wall, and the support block is arranged on a side of the baffle plate facing the first wall;
  • the first through hole penetrates the baffle plate and the insulating film, and the support block is arranged in an area of the baffle plate where the first through hole is not arranged; or,
  • the support block is provided with a second through hole, and the second through hole of at least one support block is arranged opposite to the first through hole, and the first part covers the second through hole.
  • a support block is provided on the isolation structure, and the support block can improve the structural strength of the isolation structure.
  • the first part can cover the first through hole.
  • the support block is provided in an area opposite to the first through hole, since the support block is provided with a second through hole, the second through hole is opposite to the first through hole, and therefore the first part can cover the first through hole by covering the second through hole, thereby reducing the probability of powder on one side of the electrode assembly moving to the first wall side through the first through hole.
  • a battery comprising the battery cell provided by the above technical solution.
  • the battery includes the above-mentioned battery monomer, it has at least all the beneficial effects of the above-mentioned battery monomer, which will not be described in detail here.
  • an electrical device comprising the battery provided by the above technical solution, and the battery is used to provide electrical energy.
  • the electrical device includes the above-mentioned battery, it has at least all the beneficial effects of the above-mentioned battery, which will not be described in detail here.
  • FIG1 is a schematic diagram of the structure of an electric device provided by an embodiment of the present application.
  • FIG2 is a schematic diagram of the structure of a battery provided by an embodiment of the present application.
  • FIG3 is an exploded view of the parts of a battery cell provided in the first embodiment of the present application.
  • FIG4 is a schematic diagram of the relative positions of the insulating sheet and the isolation structure in the battery cell in FIG3 ;
  • FIG5 is a schematic diagram of the structure of the insulating sheet in FIG4 ;
  • FIG6 is a schematic diagram of the expansion of the insulating sheet in the battery cell in FIG3 ;
  • FIG7 is a schematic structural diagram of a battery cell provided in the first embodiment of the present application at a viewing angle
  • FIG8 is a schematic structural diagram of a battery cell provided in the first embodiment of the present application from another viewing angle;
  • FIG. 9 is a schematic diagram of the relative positions of the insulating sheet and the isolation structure in the battery cell provided in the second embodiment of the present application.
  • FIG10 is a schematic diagram of the structure of the insulating sheet in FIG9;
  • FIG11 is a schematic structural diagram of a battery cell provided in a second embodiment of the present application at a viewing angle
  • FIG. 12 is a schematic diagram of the relative positions of the insulating sheet and the isolation structure in the battery cell provided in the third embodiment of the present application;
  • FIG13 is a schematic diagram of the structure of the insulating sheet in FIG12;
  • FIG14 is a schematic structural diagram of a battery cell provided in a third embodiment of the present application at a viewing angle
  • 15 is a schematic diagram of the relative positions of the insulating sheet and the isolation structure in the battery cell provided in the fourth embodiment of the present application;
  • FIG16 is a schematic diagram of the structure of the insulating sheet in FIG15;
  • FIG17 is a schematic structural diagram of a battery cell provided in a fourth embodiment of the present application at a viewing angle
  • FIG. 18 is a schematic diagram of the relative positions of the insulating sheet and the isolation structure in the battery cell provided in the fifth embodiment of the present application;
  • FIG19 is a schematic structural diagram of a battery cell provided in a fifth embodiment of the present application at a viewing angle
  • 20 is a schematic diagram of the relative positions of the insulating sheet and the isolation structure in the battery cell provided in the sixth embodiment of the present application;
  • FIG21 is a schematic structural diagram of a battery cell provided in a sixth embodiment of the present application at a viewing angle
  • FIG. 22 is a schematic diagram of the relative positions of the insulating sheet and the isolation structure in the battery cell provided in the seventh embodiment of the present application;
  • FIG23 is a schematic structural diagram of a battery cell provided in the seventh embodiment of the present application at a viewing angle
  • 24 is a schematic diagram of the relative positions of the insulating sheet and the isolation structure in the battery cell provided in the eighth embodiment of the present application.
  • FIG25 is a schematic structural diagram of a battery cell provided in the eighth embodiment of the present application at a viewing angle
  • 26 is a schematic diagram of the relative positions of the insulating sheet and the isolation structure in the battery cell provided in the ninth embodiment of the present application;
  • FIG. 27 is a schematic structural diagram of a battery cell provided in the ninth embodiment of the present application at a certain viewing angle.
  • the term “plurality” refers to more than two (including two).
  • first and second are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as “first” or “second” may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of “plurality” is two or more, unless otherwise clearly and specifically defined.
  • the battery cell may be a secondary battery, which refers to a battery cell that can be used continuously by activating the active material by charging after the battery cell is discharged.
  • the battery cell may be a lithium ion battery, a sodium ion battery, a sodium potassium ion battery, a lithium metal battery, a sodium metal battery, a potassium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel hydride battery, a lead storage battery, etc., and the embodiments of the present application do not limit this.
  • the battery cell may be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes.
  • the prismatic battery cell includes a square-shell battery cell, a blade-shaped battery cell, a polygonal battery, such as a hexagonal battery.
  • a battery cell generally includes an electrode assembly.
  • the electrode assembly includes a positive electrode, a negative electrode, and a separator.
  • active ions such as lithium ions
  • the separator is arranged between the positive electrode and the negative electrode to prevent the positive and negative electrodes from short-circuiting while allowing active ions to pass through.
  • the positive electrode may be a positive electrode sheet, and the positive electrode sheet may include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.
  • the positive electrode current collector has two surfaces facing each other in its thickness direction, and the positive electrode active material is disposed on either or both of the two facing surfaces of the positive electrode current collector.
  • the positive electrode current collector may be a metal foil or a composite current collector.
  • the metal foil aluminum or stainless steel treated with silver, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel or iron, etc.
  • the composite current collector may include a polymer material base and a metal layer.
  • the composite current collector may be formed by forming a metal material (aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).
  • the positive electrode active material may include at least one of the following materials: lithium-containing phosphate, transition metal oxide and their respective modified compounds.
  • the present application is not limited to these materials and other traditional materials that can be used as positive electrode active materials for batteries can also be used. These positive electrode active materials can be used alone or in combination of two or more.
  • lithium-containing phosphates may include but are not limited to lithium iron phosphate (such as LiFePO 4 (also referred to as LFP)), a composite material of lithium iron phosphate and carbon, lithium manganese phosphate (such as LiMnPO 4 ), a composite material of lithium manganese phosphate and carbon, lithium iron manganese phosphate, lithium iron manganese phosphate and carbon composite material at least one.
  • lithium iron phosphate such as LiFePO 4 (also referred to as LFP)
  • LiMnPO 4 lithium manganese phosphate
  • LiMnPO 4 lithium manganese phosphate and carbon composite material at least one.
  • the positive electrode may be a foam metal.
  • the foam metal may be foam nickel, foam copper, foam aluminum, Foam alloy, or foam carbon, etc.
  • the positive electrode active material may not be arranged on the surface of the foam metal, but of course, the positive electrode active material may also be arranged.
  • lithium source material, potassium metal or sodium metal may be filled or/and deposited in the foam metal, and the lithium source material is lithium metal and/or lithium-rich material.
  • the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.
  • the negative electrode current collector may be a metal foil, a foamed metal or a composite current collector.
  • a metal foil aluminum or stainless steel, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel or titanium, etc., treated with silver surface, may be used.
  • the composite current collector may include a polymer material base and a metal layer.
  • the foamed metal may be foamed nickel, foamed copper, foamed aluminum, foamed alloy or foamed carbon, etc.
  • the composite current collector may be formed by forming a metal material (copper, copper alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).
  • the negative electrode current collector may be a metal foil or a composite current collector.
  • a metal foil aluminum or stainless steel, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel or titanium, etc., treated with silver surface, may be used.
  • the composite current collector may include a polymer material base and a metal layer.
  • the composite current collector can be formed by forming a metal material (copper, copper alloy, nickel, nickel alloy, iron, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).
  • a metal material copper, copper alloy, nickel, nickel alloy, iron, titanium alloy, silver and silver alloy, etc.
  • a polymer material substrate such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.
  • the negative electrode sheet may include a negative electrode collector and a negative electrode active material disposed on at least one surface of the negative electrode collector.
  • the negative electrode current collector has two surfaces facing each other in its thickness direction, and the negative electrode active material is disposed on either or both of the two facing surfaces of the negative electrode current collector.
  • the negative electrode active material may be a negative electrode active material for a battery cell known in the art.
  • the negative electrode active material may include at least one of the following materials: artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based materials, tin-based materials, lithium titanate, etc.
  • the negative electrode may be a foam metal.
  • the foam metal may be foam nickel, foam copper, foam aluminum, foam alloy, or foam carbon, etc.
  • the surface of the foam metal may not be provided with a negative electrode active material, but of course, a negative electrode active material may also be provided.
  • a lithium source material, potassium metal or sodium metal may be filled or/and deposited in the negative electrode current collector, and the lithium source material is lithium metal and/or lithium-rich material.
  • the material of the positive electrode current collector may be aluminum, and the material of the negative electrode current collector may be copper.
  • the electrode assembly further includes a separator disposed between the positive electrode and the negative electrode.
  • the separator is a separator.
  • the present application has no particular limitation on the type of separator, and any known separator with a porous structure having good chemical stability and mechanical stability can be selected.
  • the main material of the isolation membrane can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride and ceramics.
  • the separator is a solid electrolyte, which is disposed between the positive electrode and the negative electrode and serves to transmit ions and isolate the positive and negative electrodes.
  • the battery cell further includes an electrolyte, which acts as a conductor of ions between the positive and negative electrodes.
  • an electrolyte which acts as a conductor of ions between the positive and negative electrodes.
  • the present application has no specific restrictions on the type of electrolyte, which can be selected according to needs.
  • the electrolyte can be liquid, gel or solid.
  • the electrode assembly is a wound structure, wherein the positive electrode sheet and the negative electrode sheet are wound into the wound structure.
  • the electrode assembly is a laminate structure.
  • a plurality of positive electrode sheets and a plurality of negative electrode sheets may be provided respectively, and the plurality of positive electrode sheets and the plurality of negative electrode sheets may be alternately stacked.
  • a plurality of positive electrode sheets may be provided, and the negative electrode sheet may be folded to form a plurality of stacked folded segments, with a positive electrode sheet being sandwiched between adjacent folded segments.
  • both the positive electrode sheet and the negative electrode sheet are folded to form a plurality of folded sections that are stacked.
  • a plurality of separators may be provided, each of which is provided between any adjacent positive electrode sheets or negative electrode sheets.
  • the separator may be disposed continuously, and disposed between any adjacent positive electrode sheets or negative electrode sheets by folding or winding.
  • the shape of the electrode assembly can be cylindrical, flat, or polygonal.
  • the electrode assembly is provided with tabs, which can conduct current from the electrode assembly, and the tabs include a positive tab and a negative tab.
  • the battery cell may include a housing, which is used to encapsulate components such as an electrode assembly and an electrolyte.
  • the shell includes a shell and an end cover assembly, the shell has an opening, and the end cover assembly covers the opening of the shell to form an inner cavity with the shell.
  • the shell can be a steel shell, an aluminum shell, a plastic shell, a composite metal shell, or an aluminum-plastic film, etc.
  • the end cap assembly includes a top cap and a top cap patch, and the top cap patch is arranged on the side of the top cap away from the housing.
  • the electrode terminal is installed on the top cap, and the electrode terminal includes a positive terminal and a negative terminal.
  • the positive pole ear is connected to the positive terminal, and the negative pole ear is connected to the negative terminal.
  • the pole ear and the electrode terminal are connected by an adapter.
  • the adapter is used to prevent damage to the battery or burning of other components when the electrode assembly is short-circuited or overcharged or over-discharged, thereby ensuring the safety of battery use.
  • An isolation structure is arranged between the electrode assembly and the shell, and a protective film is attached to the outer side of the shell.
  • a pressure relief mechanism is provided on the housing, and the pressure relief mechanism is used to release the internal pressure of the battery cell.
  • the pressure relief mechanism when the internal pressure or temperature of the battery cell reaches a predetermined threshold, it is actuated to release the internal pressure or temperature.
  • the pressure relief mechanism performs an action or a weak structure provided in the pressure relief mechanism is destroyed, thereby forming an opening or channel for the internal pressure or temperature to be released.
  • the threshold design varies according to different design requirements. The threshold may depend on one or more materials of the positive electrode sheet, the negative electrode sheet, the electrolyte and the separator in the battery cell.
  • the pressure relief mechanism can be integrally formed with the housing.
  • the pressure relief mechanism can also be separately provided and connected to the housing.
  • the "actuation" mentioned in this application refers to the pressure relief mechanism generating an action or being activated to a certain state, so that the internal pressure and temperature of the battery cell can be released.
  • the action generated by the pressure relief mechanism may include but is not limited to: the components in the pressure relief mechanism move to form an exhaust channel, at least a part of the pressure relief mechanism is broken, broken, torn or opened, and so on.
  • the pressure relief mechanism When the pressure relief mechanism is activated, the high-temperature and high-pressure substances inside the battery cell will be discharged from the actuated part as emissions. In this way, the battery cell can be depressurized and cooled under controllable pressure or temperature, thereby avoiding potential more serious accidents.
  • the emissions from the battery cell mentioned in the embodiments of the present application include but are not limited to: electrolytes, dissolved or split positive and negative electrodes, fragments of separators, high-temperature and high-pressure gases generated by the reaction, flame
  • the battery mentioned in the embodiments of the present application may include one or more battery cells to provide a single physical module with higher voltage and capacity.
  • the multiple battery cells are connected in series, in parallel or in mixed connection through a busbar component.
  • the battery may be a battery module.
  • the multiple battery cells are arranged and fixed to form a battery module.
  • the battery may be a battery pack, which includes a case and battery cells, wherein the battery cells or battery modules are accommodated in the case.
  • the box body can be used as a part of the chassis structure of the vehicle.
  • part of the box body can become at least a part of the floor of the vehicle, or part of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.
  • the battery may be an energy storage device, which includes an energy storage container, an energy storage cabinet, and the like.
  • a through hole is provided on the isolation structure, and the through hole is provided on both sides of the isolation structure to form a channel, so that the powder (such as anode powder) on one side of the electrode assembly can move to the other side of the isolation structure through the through hole, and the powder is in contact with the shell on the other side of the isolation structure, which can easily cause the battery cell to short-circuit or corrode.
  • the powder such as anode powder
  • the isolation structure includes an insulating film and a bottom support plate, and the insulating film and the bottom support plate are both provided with through holes, and the through holes on the insulating film and the through holes on the bottom support plate are arranged relative to each other, so as to perform the positioning operation of the insulating film and the bottom support plate, so as to facilitate the connection of the insulating film and the bottom support plate.
  • the through holes on the insulating film and the through holes on the bottom support plate are connected to form a channel, so that the powder moves from one side of the electrode assembly to the other side of the isolation structure through the channel and contacts the shell, which can easily cause the battery cell to short-circuit, affecting the stability of the battery cell.
  • the battery cell includes a shell, an electrode assembly, an isolation structure and an insulating sheet.
  • the isolation structure is located between the electrode assembly and the first wall of the shell.
  • the isolation structure is provided with a first through hole, and the insulating sheet covers the first through hole. Since the first through hole is blocked, the powder on one side of the electrode assembly can move to the other side of the isolation structure through the through hole.
  • the battery cell provided in this embodiment can be used in batteries, and the battery can be used in electrical devices, including but not limited to: mobile phones, portable devices, laptop computers, electric vehicles, electric vehicles, ships, spacecraft, electric toys and electric tools, etc.
  • spacecraft include airplanes, rockets, space shuttles and spacecrafts, etc.
  • Electric toys include fixed or mobile electric toys, such as game consoles, electric vehicle toys, electric ship toys and electric airplane toys, etc.
  • Electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators and electric cutters.
  • Electrical devices include, but are not limited to: mobile phones, portable devices, laptop computers, electric vehicles, electric vehicles, ships, spacecraft, electric toys and electric tools, etc.
  • spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.
  • Electric toys include fixed or mobile electric toys, such as game consoles, electric vehicle toys, electric ship toys and electric airplane toys, etc.
  • Electric tools include metal cutting power tools, grinding power tools, assembly power tools and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators and electric planers.
  • a vehicle is taken as an electrical device 1.
  • the vehicle can be a fuel vehicle, a gas vehicle or a new energy vehicle.
  • the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an augmented program vehicle, etc.
  • a driving mechanism 30, a control mechanism 20 and a battery 10 can be arranged inside the vehicle.
  • the driving mechanism 30 can be a motor, etc.
  • the control mechanism 20 is used to control the battery 10 to supply power to the driving mechanism 30.
  • a battery 10 can be arranged at the bottom, front or rear of the vehicle.
  • the battery 10 can be used to power other devices of the vehicle.
  • This embodiment provides a battery cell 100 including a shell 110, an electrode assembly 120, an isolation structure 170 and an insulating sheet 160, wherein the shell 110 has an inner cavity, and the shell 110 has a first wall 111, the electrode assembly 120 is arranged in the inner cavity, the isolation structure 170 is arranged between the first wall 111 and the electrode assembly 120, and a first through hole 150 is arranged on the portion of the isolation structure 170 located between the first wall 111 and the electrode assembly 120, and the insulating sheet 160 includes a first part 161, and the first part 161 covers the first through hole 150.
  • the outer shell 110 forms the outer shell structure of the battery cell 100.
  • the outer shell 110 is at least partially hollow to form an inner cavity.
  • the outer shell 110 has a first wall 111.
  • the first wall 111 is one of the wall surfaces of the outer shell 110.
  • the first wall 111 can be at least one of the bottom wall, top wall or side wall of the outer shell 110.
  • the outer shell 110 can be an aluminum shell or other materials.
  • the electrode assembly 120 includes a pole ear 122, and the pole ear 122 includes a positive pole ear and a negative pole ear.
  • the end cap assembly includes a top cover 102 and a top cover patch 101, and the top cover patch 101 is arranged on the side of the top cover 102 away from the housing.
  • a terminal is installed on the top cover 102, and the electrode terminal includes a positive terminal and a negative terminal, the positive pole ear is connected to the positive terminal, and the negative pole ear is connected to the negative terminal.
  • the tab 122 is connected to the electrode terminal via the adapter 103.
  • the adapter 103 is used to prevent the battery 10 from being damaged or other components from being burned when the electrode assembly 120 is short-circuited or overcharged or over-discharged, thereby ensuring the safety of the battery.
  • the electrode assembly 120 is installed in the inner cavity, and the electrode assembly 120 may be a winding structure or a laminated structure.
  • the electrode assembly 120 may be placed in the inner cavity of the outer shell 110 through an opening on the outer shell 110 .
  • the isolation structure 170 is blocked between the electrode assembly 120 and the first wall 111 of the housing 110, the possibility of short circuit of the electrode assembly 120 can be reduced, which helps to improve the reliability of the battery cell 100. Due to the blocking of the isolation structure 170, even if the housing 110 is deformed to a certain extent, the isolation structure 170 can isolate the first wall 111 from the electrode assembly 120, thereby reducing the problem of short circuit caused by the contact between the electrode assembly 120 and the first wall 111.
  • the isolation structure 170 may be made of insulating material.
  • the first through hole 150 can be used to allow a positioning structure to pass through, so as to position the installation position of the isolation structure 170 through the positioning structure, so as to facilitate the installation of the isolation structure 170; or, when the isolation structure 170 includes multiple components, the first through hole 150 passes through at least two of the components, and the first through hole 150 allows the positioning structure to pass through, so as to align at least two components of the isolation structure 170 through which the first through hole 150 is provided, so as to facilitate the assembly of the isolation structure 170 itself.
  • the length direction of the battery cell 100 is shown in the X direction, and the width direction is shown in the Y direction.
  • the height direction is shown as the Z direction.
  • the X direction, Y direction and Z direction are perpendicular to each other.
  • the X direction, Y direction and Z direction do not point to a single direction or a single position.
  • the direction parallel to the X direction is called the X direction
  • the direction parallel to the Y direction is called the Y direction
  • the direction parallel to the Z direction is called the Z direction.
  • both the X direction and the Y direction are parallel to the first wall 111 , and the first through hole 150 penetrates the isolation structure 170 along the Z direction.
  • the first portion 161 of the insulating sheet 160 is used to cover the first through hole 150 to block the flow on both sides of the first through hole 150, thereby reducing or even preventing the powder on one side of the electrode assembly 120 from moving to the first wall 111 side through the first through hole 150 to a certain extent.
  • the first portion 161 may be arranged on the side of the isolation structure 170 close to the first wall 111 and cover the first through hole 150; the first portion 161 may be arranged on the side of the isolation structure 170 close to the electrode assembly 120 and cover the first through hole 150; or the first portion 161 may also at least partially extend into the first through hole 150 to block the first through hole 150, thereby covering the first through hole 150.
  • the first through hole 150 is used for positioning and installing the isolation structure 170. After the isolation structure 170 is positioned, the first portion 161 is covered at the first through hole 150 to block the flow of the first through hole 150.
  • the first portion 161 covering the first through hole 150 means that the projection of the first portion 161 overlaps with the projection of the first through hole 150 , or in other words, in a plane parallel to the first wall 111 , the projection of the first through hole 150 is completely located within the projection of the first portion 161 .
  • the electrode assembly 120 is located inside the outer shell 110, and the isolation structure 170 is located between the first wall 111 of the outer shell 110 and the electrode assembly 120. Since the insulating sheet 160 covers the first through hole 150, the arrangement of the insulating sheet 160 can reduce the probability of powder on one side of the electrode assembly 120 moving through the first through hole 150 to the side of the first wall 111 to a certain extent, thereby improving the reliability of the battery cell 100.
  • the insulating sheet 160 may adopt a film structure, which has a relatively small thickness and occupies a small space.
  • the thickness of the insulating sheet 160 may be 0.01 mm-0.5 mm, for example, the thickness of the insulating sheet 160 may be 0.01 mm, 0.02 mm, 0.03 mm, 0.04 mm, 0.05 mm, 0.1 mm, 0.12 mm, 0.15 mm, 0.18 mm, 0.2 mm, 0.25 mm, 0.3 mm, 0.35 mm, 0.4 mm, 0.42 mm, 0.48 mm, 0.5 mm, etc.
  • the thickness of the insulating sheet 160 is the vertical distance between one side of the insulating sheet 160 facing the isolation structure 170 and the other side opposite thereto.
  • the thickness of the first portion 161 located between the first wall 111 and the isolation structure 170 is the size of the first portion 161 in the Z direction.
  • the insulating sheet 160 has sufficient structural strength to block the passage of powder or liquid, thereby covering the first through hole 150, and within this size range, the insulating sheet 160 has a relatively small thickness, occupies a small space, and is lightweight.
  • the isolation structure 170 is provided with a plurality of first through holes 150 , and the insulating sheet 160 covers all the first through holes 150 .
  • a plurality of first through holes 150 are provided on the isolation structure 170, and the plurality of first through holes 150 are all provided in the area of the isolation structure 170 between the first wall 111 and the electrode assembly 120, and the plurality of first through holes 150 are arranged at intervals.
  • the plurality of first through holes 150 can allow a plurality of positioning structures to pass through, so as to position the isolation structure 170 through the plurality of positioning structures, and the positioning effect is better and the stability is higher.
  • the insulating sheet 160 covers all the first through holes 150, so that after the battery cell 100 is assembled, all the first through holes 150 are blocked by the insulating sheet 160, so that any first through hole 150 is blocked to prevent the powder from moving to the other side of the isolation structure 170 through one or more first through holes 150.
  • the probability of the powder on one side of the electrode assembly 120 moving to the first wall 111 side through the first through hole 150 is reduced when the number of the first through holes 150 is multiple.
  • the number of the insulating sheets 160 is equal to the number of the first through holes 150.
  • the insulating sheets 160 are arranged one by one corresponding to the first through holes 150 , and cover the corresponding first through holes 150 ; or, the number of the insulating sheets 160 is one, and one insulating sheet 160 covers all the first through holes 150 .
  • the number of the first through holes 150 is four, and the number of the insulating sheets 160 may be one, two, three or four.
  • the insulating sheet 160 blocks four first through holes 150.
  • the number of the insulating sheets 160 is two, one insulating sheet 160 can block one first through hole 150, and the other insulating sheet 160 can block three first through holes 150, or each of the two insulating sheets 160 blocks two first through holes 150 respectively.
  • the number of the insulating sheets 160 is three, one insulating sheet 160 blocks two first through holes 150, and the other two insulating sheets 160 block one first through hole 150 respectively.
  • each insulating sheet 160 blocks one first through hole 150 correspondingly.
  • the number of insulating sheets 160 is equal to the number of first through holes 150, and the insulating sheets 160 are arranged in a one-to-one correspondence with the first through holes 150, and the insulating sheets 160 cover the corresponding first through holes 150.
  • the number of first through holes 150 is two
  • the number of insulating sheets 160 is two
  • the first part 161 of one insulating sheet 160 covers one first through hole 150
  • the first part 161 of another insulating sheet 160 covers another first through hole 150.
  • the size of the insulating sheet 160 is relatively small, reducing the space occupied by the insulating sheet 160.
  • the insulating sheet 160 may be made of insulating tape (such as insulating blue adhesive), insulating film 130 (such as insulating blue film) or other materials that can achieve insulating effect.
  • insulating tape such as insulating blue adhesive
  • insulating film 130 such as insulating blue film
  • the first portion 161 may be connected to the isolation structure 170 by hot melting and cover the first through hole 150 .
  • the first portion 161 is adhered to the opening of the first through hole 150 .
  • the first through hole 150 passes through the isolation structure 170, the first through hole 150 has two openings, one of which is adjacent to the first wall 111, and the other is adjacent to the electrode assembly 120.
  • the first portion 161 of the insulating sheet 160 may be attached to the opening of the first through hole 150 adjacent to the first wall 111, or may be attached to the opening of the first through hole 150 adjacent to the electrode assembly 120.
  • the first part 161 may have an adhesive layer itself, for example, the insulating sheet 160 is an insulating tape, one side of which is an adhesive-free surface and the other side is an adhesive surface, the adhesive surface of the insulating sheet 160 is attached to the isolation structure 170, and the first part 161 of the insulating sheet 160 covers the first through hole 150.
  • the first part 161 may not have an adhesive layer itself, but is attached to the isolation structure 170 by adhesive.
  • the insulating sheet 160 may be located on a side of the isolation structure 170 that is away from the first wall 111 and close to the electrode assembly 120, or may be located on a side of the isolation structure 170 that faces the first wall 111 and away from the electrode assembly 120.
  • the first portion 161 is located on a side of the isolation structure 170 that faces the first wall 111.
  • the electrode assembly 120 may be connected to the isolation structure 170 first, and then the first portion 161 may be covered on the isolation structure 170.
  • the first part 161 is disposed on the side of the isolation structure 170 facing the first wall 111, so as to facilitate the connection operation between the first part 161 and the isolation structure 170 after the isolation structure 170 is connected to the electrode assembly 120. Since the first part 161 is disposed on the side of the isolation structure 170 facing the first wall 111, when the first part 161 is fixedly connected to the isolation structure 170, the operation space is larger, and the operation is convenient.
  • the first through hole 150 includes a first hole segment 151 and a second hole segment 152.
  • the first hole segment 151 and the second hole segment 152 are arranged opposite to each other and are connected to each other.
  • the first hole segment 151 is arranged on the insulating film 130 and penetrates the insulating film 130.
  • the second hole segment 152 is arranged on the baffle plate 140 and penetrates the baffle plate 140.
  • the cross-sectional shape of the first hole segment 151 can be the same as or different from the cross-sectional shape of the second hole segment 152.
  • the first hole segment 151 and the second hole segment 152 can be respectively in the shape of a circular hole, an elliptical hole, a racetrack hole, a polygonal hole, etc.
  • the cross-sectional shape of the first hole segment 151 and the cross-sectional shape of the second hole segment 152 are both in the shape in the cross section parallel to the first wall 111.
  • the insulating film 130 and the baffle plate 140 can be positioned through the first hole segment 151 and the second hole segment 152.
  • the positioning structure is first passed through the first hole segment 151 and then extended into the second hole segment 152, or the positioning structure is first passed through the second hole segment 152 and then extended into the first hole segment 151.
  • the relative limitation between the positioning structure and the insulating film 130 is achieved through the cooperation between the positioning structure and the first hole segment 151.
  • the relative positioning between the positioning structure and the baffle plate 140 is achieved through the cooperation between the positioning structure and the second hole segment 152. Since the same positioning structure is sequentially passed through the first hole segment 151 and the second hole segment 152, the insulating film 130 and the baffle plate 140 are relatively positioned through the positioning structure.
  • the first part 161 covers the side of the first hole section 151 away from the second hole section 152, or the first part 161 covers the side of the second hole section 152 away from the first hole section 151. Since the first hole section 151 is connected to the second hole section 152, by covering either the first hole section 151 or the second hole section 152, the connection of the first through hole 150 can be blocked by the first part 161.
  • the first through hole 150 is used for positioning and installing the insulating film 130 and the baffle plate 140, the first through hole 150 is no longer needed after the insulating film 130 and the baffle plate 140 are connected. Therefore, the first part 161 is connected after the insulating film 130 and the baffle plate 140 are connected, and the first part 161 covers the first hole section 151 or the second hole section 152, so as to cover the first through hole 150.
  • the insulating film 130 includes a first film layer 131 and a second film layer 132, the first film layer 131 is located between the electrode assembly 120 and the first wall 111, and the second film layer 132 is coated on at least part of the circumferential side of the electrode assembly 120, and the first film layer 131 and the second film layer 132 can be independent structures and then connected together, or can be an integral structure.
  • the second film layer 132 can be an integral structure or a split structure, and when the second film layer 132 is a split structure, the second film layer 132 includes a plurality of sub-film layers, and different sub-film layers are respectively coated on the outside of different sides of the electrode assembly 120, and the edges of adjacent sub-film layers are connected.
  • the insulating film 130 is a whole film layer, that is, the first film layer 131 and the second film layer 132 are an integrated structure, which is wrapped around multiple sides of the electrode assembly 120 after folding.
  • the part located between the electrode assembly 120 and the first wall 111 is the first film layer 131, and the part surrounding and wrapping around the outside of the electrode assembly 120 is the second film layer 132.
  • the insulating sheet 160 includes only the first portion 161 .
  • the insulating film 130 is folded and wrapped around the electrode assembly 120, and forms a first fold edge 132a and a second fold edge 132b that overlap or connect with each other on the side of the electrode assembly 120, and the insulating sheet 160 includes a second part 162, which fixes the first fold edge 132a and the second fold edge 132b, and the first part 161 is connected to the second part 162.
  • the dotted line in FIG. 6 is the folding mark
  • the insulating film 130 is a whole film layer
  • the second film layer 132 is divided into two parts, respectively referred to as the first sub-film layer and the second sub-film layer
  • the first sub-film layer and the second sub-film layer are respectively located on opposite sides of the first film layer 131, in the X direction
  • the first sub-film layer is respectively provided with a first folding edge 132a on both sides
  • the second sub-film layer is respectively provided with a second folding edge 132b on both sides
  • the first folding edge 132a and the second folding edge 132b are respectively provided in a one-to-one correspondence, after folding, one of the first folding edges 132a and one of the second folding edges 132b have a partial overlapping area
  • the second part 162 fixes the first folding edge 132a and the second folding edge 132b.
  • Another first folding edge 132a and another second folding edge 132b have a partial overlapping area
  • the second part 162 fixes the
  • the insulating sheet 160 can not only cover the first through hole 150, but also fix the first folded edge 132a and the second folded edge 132b. Since the insulating sheet 160 includes the connected first portion 161 and the second portion 162, the contact area between the insulating sheet 160 and the isolation structure 170 is increased, thereby improving the connection stability between the insulating sheet 160 and the isolation structure 170.
  • the number of insulating sheets 160 may be one or more.
  • there is one insulating sheet 160 there is one first portion 161, and the number of second portions 162 is the same as the number of first folded edges 132a, and each second portion 162 is connected to the same first portion 161.
  • one insulating sheet 160 includes a first portion 161 and a plurality of second portions 162, the number of second portions 162 is less than the number of first folded edges 132a, and the number of second portions 162 of multiple insulating sheets 160 is equal to the number of first folded edges 132a.
  • the number of second folded edges 132b of different insulating sheets 160 may be the same or different.
  • one of the insulating sheets 160 may include a first portion 161 and three second portions 162, the other insulating sheet 160 may include a first portion 161 and a second portion 162, or both insulating sheets 160 may include a first portion 161 and two second portions 162.
  • the insulating sheet 160 includes a first part 161 and a second part 162.
  • the number of first folded edges 132a is two
  • the number of insulating sheets 160 is two
  • each insulating sheet 160 includes a first part 161 and a second part 162, wherein one second part 162 fixes one of the first folded edges 132a and one of the second folded edges 132b, and the other second part 162 fixes the other first folded edge 132a and the other second folded edge 132b.
  • the second portion 162 can be attached to the insulating film 130 to fix the first folded edge 132a and the second folded edge 132b. That is, the second portion 162 is connected to the first folded edge 132a and the second folded edge 132b by gluing.
  • the first folded edge 132a and the second folded edge 132b have a partial overlap area, and part of the second portion 162 is attached to the first folded edge 132a, and part of the second portion 162 is attached to the second folded edge 132b, so as to fix the first folded edge 132a and the second folded edge 132b. Since the first folded edge 132a and the second folded edge 132b have a partial overlap area, the coating effect of the first folded edge 132a and the second folded edge 132b on the electrode assembly 120 can be improved.
  • the second portion 162 in the first direction, is spaced apart from at least one of the two edges of the isolation structure 170 spaced apart in the first direction, and the first direction is parallel to the width direction of the first wall 111.
  • the first direction is the Y direction.
  • the second portion 162 is spaced apart from at least one edge of the isolation structure 170, and in the first direction, one side of the isolation structure 170 has two opposite edges, and the second portion 162 may be spaced apart from one of the edges, or the second portion 162 may be spaced apart from both edges of the isolation structure 170.
  • the second part 162 is spaced apart from at least one edge of the isolation structure 170, that is, in the first direction, the size of the second part 162 is smaller than the size of the isolation structure 170, it is convenient to flatly cover the second part 162 on the insulating film 130 and reduce the space occupied by the second part 162.
  • the distance between the second part 162 and the two side edges of the isolation structure 170 is equal. That is to say, in one side of the isolation structure 170, the second part 162 is centrally arranged, and when the seam between the first folded edge 132a and the second folded edge 132b is located in the non-edge area of the electrode assembly 120, the second part 162 can play a good fixing role for both the first folded edge 132a and the second folded edge 132b.
  • the second part 162 is attached to the middle area of the insulating film 130, which is convenient for fixing the first folded edge 132a and the second folded edge 132b.
  • the second part 162 is arranged in the middle area of one side of the isolation structure 170, the two side edges of the second part 162 are both attached to the side of the isolation structure 170, which is convenient for improving the flatness of the second part 162.
  • the first portion 161 and the second portion 162 are of equal width, that is, in the first direction, the size of the first portion 161 is equal to the size of the second portion 162.
  • the insulating sheet 160 is a rectangular strip structure, which is pasted with the first folded edge 132a and the second folded edge 132b on one side of the isolation structure 170, and then bent and pasted on the side of the isolation structure 170 facing the first wall 111, and covers the first through hole 150.
  • the portion pasted on the first folded edge 132a and the second folded edge 132b is the second portion 162, and the portion pasted on the isolation structure 170 facing the first wall 111 is the first portion 161.
  • the width of the housing 110 in the first direction, is W1, the width of the second portion 162 is W2, and 0.1 ⁇ W2/W1 ⁇ 0.9.
  • the width of the housing 110 is the size of the housing 110 in the first direction
  • the width of the second portion 162 is the size of the second portion 162 in the first direction.
  • the width of the second portion 162 is at least 0.1 times the width of the housing 110
  • the width of the second portion 162 is at most 0.9 times the width of the housing 110.
  • the width setting range of the second portion 162 is related to the width of the housing 110.
  • the width of the second portion 162 can be set according to the width of the housing 110. Since the width of the second portion 162 is 0.1 times or more than the width of the housing 110, the width of the second portion 162 is sufficient to meet the fixing of the first folded edge 132a and the second folded edge 132b. Since the width of the second portion 162 is 0.9 times or less than the width of the housing 110, the second portion 162 can be completely laid flat on the side of the isolation structure 170, with high flatness and small space occupation. For example, the width of the second portion 162 can be 0.1 times, 0.2 times, 0.3 times, 0.4 times, 0.5 times, 0.6 times, 0.7 times, 0.8 times, 0.9 times, etc., of the width of the housing 110.
  • the width of the second portion 162 ranges from 10 mm to 90 mm, such as 10 mm, 15 mm, 20 mm, 25 mm, 35 mm, 40 mm, 48 mm, 50 mm, 60 mm, 70 mm, 78 mm, 80 mm, 90 mm, etc.
  • the width of the second portion 162 is at least 0.25 times the width of the housing 110, which can increase the contact area with the first folded edge 132a and the second folded edge 132b, thereby improving For the fixing effect of the first folded edge 132a and the second folded edge 132b; the width of the second part 162 is at most 0.75 times the width of the shell 110, so that the width of the second part 162 is small on the basis of satisfying the fixing of the first folded edge 132a and the second folded edge 132b.
  • the width of the second part 162 can be 0.1 times, 0.2 times, 0.3 times, 0.4 times, 0.5 times, 0.6 times, 0.7 times, 0.8 times, 0.9 times, etc. of the width of the shell 110.
  • the width of the second part 162 ranges from 25mm to 75mm, such as 25mm, 28mm, 30mm, 37mm, 42mm, 47mm, 52mm, 55mm, 65mm, 72mm or 75mm, etc.
  • the size of the second portion 162 along the height direction of the electrode assembly 120 is 10 mm-80 mm. That is, in the Z direction, the size of the second portion 162 is 10 mm-80 mm.
  • the second portion 162 may be 10 mm, 20 mm, 25 mm, 30 mm, 35 mm, 40 mm, 45 mm, 55 mm, 60 mm, 65 mm, 70 mm, 75 mm or 80 mm, etc.
  • the height of the second portion 162 may be sufficient to fix the first folded edge 132 a and the second folded edge 132 b.
  • the size of the second portion 162 is 15mm-50mm. That is to say, in the Z direction, the size of the second portion 162 is 15mm-50mm.
  • the second portion 162 may be 15mm, 17mm, 22mm, 27mm, 32mm, 38mm, 42mm, 48mm or 50mm, etc.
  • the contact area between the second portion 162 and the first folded edge 132a and the second folded edge 132b is relatively larger, and the fixing effect of the first folded edge 132a and the second folded edge 132b is relatively better.
  • the second portion 162 occupies a relatively small space on the side of the isolation structure 170.
  • the isolation structure 170 includes a baffle plate 140 and an insulating film 130
  • the baffle plate 140 is located between the electrode assembly 120 and the first wall 111
  • at least a portion of the insulating film 130 is located between the electrode assembly 120 and the first wall 111
  • the first through hole 150 includes a first hole segment 151 and a second hole segment 152 that are arranged opposite to each other and are in communication
  • the first hole segment 151 is arranged on the insulating film 130
  • the second hole segment 152 is arranged on the baffle plate 140.
  • the two first hole segments are arranged opposite to each other and are in communication with each other, and the first portion 161 covers the opening on one side of the first hole segment 151 away from the second hole segment 152 or the opening on one side of the second hole segment 152 away from the first hole segment 151.
  • the baffle plate 140 is provided with only two holes, both of which are first hole segments 151; the insulating film 130 is provided with only two holes, both of which are second hole segments 152. That is to say, the baffle plate 140 has only two holes, both of which are first hole segments 151, and on the baffle plate 140, except for the first hole segments 151, no other holes penetrating the baffle plate 140 are provided.
  • the insulating film 130 has only two holes, both of which are second hole segments 152, and on the insulating film 130, except for the second hole segments 152, no other holes penetrating the insulating film 130 are provided.
  • the first hole segment 151 and the second hole segment 152 can be used to implement the positioning of the baffle plate 140 and the insulating film 130, and the two first hole segments 151 and the two second hole segments 152 can provide better positioning accuracy.
  • the first portion 161 covers all the holes on the baffle plate 140 and the insulating film 130, so that the baffle plate and the insulating sheet have a better blocking effect on the powder on one side of the electrode assembly.
  • the isolation structure 170 further includes a support block 180, the baffle plate 140 is disposed between the insulating film 130 and the first wall 111, and the support block 180 is disposed on the side of the baffle plate 140 facing the first wall 111; in one configuration, the support block 180 is disposed in an area of the baffle plate 140 where the first through hole 150 is not disposed; in another configuration, the support block 180 is provided with a second through hole 181, and the second through hole of at least one support block 180 181 is disposed opposite to the first through hole 150 , and the first portion 161 covers the second through hole 181 .
  • the number of the support block 180 is one or more. When the number of the support block 180 is one, the support block 180 may be disposed in the region where the first through hole 150 is disposed on the baffle plate 140, or may be disposed in the region where the first through hole 150 is not disposed on the baffle plate 140. When the support block 180 is disposed in the region where the first through hole 150 is disposed on the baffle plate 140, the support block 180 is provided with a second through hole 181 that is connected to the first through hole 150. When the support block 180 is disposed in the region where the first through hole 150 is not disposed on the baffle plate 140, the support block 180 may be provided with the second through hole 181, or may not be provided with the second through hole 181.
  • all support blocks 180 may be disposed in the region where the first through hole 150 is disposed on the baffle plate 140, or may be disposed in the region where the first through hole 150 is not disposed on the baffle plate 140, and some support blocks 180 may be disposed in the region where the first through hole 150 is disposed on the baffle plate 140, and other support blocks 180 may be disposed in the region where the first through hole 150 is not disposed on the baffle plate 140.
  • all support blocks 180 are disposed in the region where the first through hole 150 is disposed, all support blocks 180 are disposed with second through holes 181, the second through holes 181 are connected to the first through holes 150 in a one-to-one correspondence, and the first portion 161 covers all second through holes 181.
  • the support block 180 covering the first through hole 150 is provided with a second through hole 181 to communicate with the first through hole 150 through the second through hole 181, and the other support blocks 180 not disposed at the first through hole 150 may or may not be provided with the second through hole 181.
  • the support blocks 180 may or may not be provided with the second through hole 181.
  • two first through holes 150 are arranged at intervals on the baffle plate 140, and four support blocks 180 are arranged.
  • the four support blocks 180 two support blocks 180 are arranged at the two first through holes 150 respectively, and two support blocks 180 are arranged in the area where the first through holes 150 are not arranged.
  • the four support blocks 180 are all provided with second through holes 181, and the second through holes 181 on the support blocks 180 arranged opposite to the first through holes 150 are arranged opposite to and communicate with the corresponding first through holes 150. Since the four support blocks 180 are all provided with the second through holes 181, the four support blocks 180 can adopt the same structure, which is convenient for production and manufacturing.
  • the support block 180 can improve the structural strength of the isolation structure 170.
  • the first part 161 can cover the first through hole 150.
  • the support block 180 is provided in an area opposite to the first through hole 150, since the support block 180 is provided with the second through hole 181, the second through hole 181 is opposite to the first through hole 150, the first part 161 can cover the first through hole 150 by covering the second through hole 181, thereby reducing the probability of the powder on one side of the electrode assembly 120 moving to the side of the first wall 111 through the first through hole 150.
  • the support block 180 and the baffle plate 140 may be connected by heat fusion, and the baffle plate 140 and the insulating film 130 may be connected by heat fusion.
  • two first through holes 150 are provided on the baffle plate 140, the center line of the baffle plate 140 along the width direction is P1, and the two first through holes 150 are both provided in an area close to a side edge in the width direction of the baffle plate 140, that is, the two first through holes 150 are both located on the same side of P1.
  • There are four support blocks 180 two support blocks 180 are provided with second through holes 181, the two support blocks 180 are both provided at positions opposite to the first through holes 150, and the second through holes 181 on the support blocks 180 are connected to the first through holes 150.
  • the other two support blocks 180 are not provided with the second through holes 181, and the other two support blocks 180 are provided in an area where the first through holes 150 are not provided.
  • insulating sheets 160 There are two insulating sheets 160, and a first portion 161 of one insulating sheet 160 is attached to the surface of two supporting blocks 180 located on one side of the baffle plate 140 along the length direction and away from the baffle plate 140, and the first portion 161 covers the surface of one of the supporting blocks 180.
  • the first portion 161 of another insulating sheet 160 is pasted on the surface of two support blocks 180 located on the other side of the baffle plate 140 along the length direction away from the baffle plate 140 , and the first portion 161 covers the second through hole 181 on one of the support blocks 180 .
  • two first through holes 150 are provided on the baffle plate 140, the center line of the baffle plate 140 along the width direction is P1, and the two first through holes 150 are both provided in an area close to a side edge in the width direction of the baffle plate 140, that is, the two first through holes 150 are both located on the same side of P1.
  • There are four support blocks 180 two support blocks 180 are provided with second through holes 181, the two support blocks 180 are both provided at positions opposite to the first through holes 150, and the second through holes 181 on the support blocks 180 are connected to the first through holes 150.
  • the other two support blocks 180 are not provided with the second through holes 181, and the other two support blocks 180 are provided in an area where the first through holes 150 are not provided.
  • first portion 161 of one insulating sheet 160 is pasted on a surface of the support block 180 provided with the second through hole 181 and located at one side of the baffle plate 140 along the length direction, away from the baffle plate 140, and the first portion 161 covers the second through hole 181.
  • the first portion 161 of the other insulating sheet 160 is pasted on a surface of the support block 180 provided with the second through hole 181 and located at the other side of the baffle plate 140 along the length direction, away from the baffle plate 140, and the first portion 161 covers the second through hole 181.
  • two first through holes 150 are provided on the baffle plate 140, the center line of the baffle plate 140 along the width direction is P1, and the two first through holes 150 are both provided in an area close to a side edge in the width direction of the baffle plate 140, that is, the two first through holes 150 are both located on the same side of P1.
  • There are four support blocks 180 two support blocks 180 are provided with second through holes 181, the two support blocks 180 are both provided at positions opposite to the first through holes 150, and the second through holes 181 on the support blocks 180 are connected to the first through holes 150.
  • the other two support blocks 180 are not provided with the second through holes 181, and the other two support blocks 180 are provided in an area where the first through holes 150 are not provided.
  • both sides of the first portion 161 of the insulating sheet 160 along the X direction are respectively adhered to two supporting blocks 180 provided with second through holes 181 , and the first portion 161 of the insulating sheet 160 covers the two second through holes 181 .
  • two first through holes 150 are provided on the baffle plate 140, the center line of the baffle plate 140 along the width direction is P1, and the center points of the two first through holes 150 are both located on P1, that is, the two first through holes 150 are centrally arranged in the width direction of the baffle plate 140, the number of the support blocks 180 is four, none of the four support blocks 180 is provided with the second through hole 181, and the four support blocks 180 are all arranged in the area where the first through hole 150 is not provided, that is, the first through hole 150 will not be blocked by any support block 180.
  • the number of the insulating sheet 160 is one, the first part 161 of the insulating sheet 160 is attached to the baffle plate 140, and the first part 161 of the insulating sheet 160 covers the two second through holes 181 on both sides along the X direction respectively.
  • two first through holes 150 are provided on the baffle plate 140, the center line of the baffle plate 140 along the width direction is P1, and the center points of the two first through holes 150 are both located on P1, that is, the two first through holes 150 are centrally arranged in the width direction of the baffle plate 140, the number of support blocks 180 is four, none of the four support blocks 180 is provided with a second through hole 181, and the four support blocks 180 are all arranged in an area where no first through hole 150 is provided, that is, the first through hole 150 will not be blocked by any support block 180.
  • the number of insulating sheets 160 is two, and the two insulating sheets 160 are spaced apart and attached to the baffle structure, and the first parts 161 of the two insulating sheets 160 cover the two first through holes 150 respectively.
  • a third through hole 1411 is provided on the baffle plate 140 , and the third through hole 1411 penetrates the baffle plate 140 along the Z direction.
  • the third through hole 1411 can connect two opposite surfaces of the baffle plate 140 in the Z direction, so that the airflows on both sides of the baffle plate 140 in the Z direction can flow to each other, thereby increasing the airflow flow path in the battery cell and improving the airflow flow performance in the battery cell.
  • the third through hole 1411 is provided on the baffle plate 140, which can also reduce the weight of the baffle plate 140, thereby making the weight of the battery cell lighter.
  • the multiple third through holes 1411 there are multiple third through holes 1411 on the baffle plate 140, and the multiple third through holes 1411 are all arranged in the middle area of the baffle plate 140.
  • the multiple third through holes 1411 can be distributed in an array on the baffle plate 140, and in the X direction, the first through holes 150 are arranged on both sides of the array area formed by the multiple third through holes 1411.
  • each third through hole 1411 are smaller than the cross-sectional dimensions of the first through hole 150.
  • the cross-sectional dimensions of the first hole segment 151 and the second hole segment 152 may be equal or unequal.
  • the cross-sectional dimensions of the third through hole 1411 are smaller than the cross-sectional dimensions of the first hole segment 151 and the second hole segment 152, whichever has the smaller cross-sectional dimensions. That is, relative to the first through hole 150, the dimensions of the third through hole 1411 are relatively small.
  • this embodiment further provides an example of a battery 10.
  • the battery 10 includes the battery cell 100 provided in any of the above-mentioned embodiments.
  • the battery 10 may be a battery 10 module.
  • the multiple battery cells 100 are arranged and fixed to form a battery 10 module.
  • the battery 10 may also be a battery 10 pack, which includes a box 200 and a battery cell 100, wherein the battery cell 100 or the battery 10 module is accommodated in the box 200.
  • the box 200 is used to provide a storage space for the battery cell 100 or the battery 10 module, and the box 200 may be independent of other structures of the electric device 1, or the box 200 may be a part of other structures in the electric device 1.
  • the box 200 may be a part of the chassis of the vehicle, for example, a part of the box 200 may become at least a part of the floor of the vehicle, or a part of the box 200 may become at least a part of the cross beam and longitudinal beam of the vehicle.
  • the battery pack 10 there can be multiple battery cells 100, and the multiple battery cells 100 can be connected in series, in parallel, or in mixed connection.
  • Mixed connection means that the multiple battery cells 100 are both connected in series and in parallel.
  • the multiple battery cells 100 can be directly connected in series, in parallel, or in mixed connection, and then the whole formed by the multiple battery cells 100 is accommodated in the box 200; of course, the battery 10 can also be a battery 10 module formed by multiple battery cells 100 connected in series, in parallel, or in mixed connection, and the multiple battery 10 modules are then connected in series, in parallel, or in mixed connection to form a whole, and accommodated in the box 200.
  • the battery 10 may further include other structures.
  • the battery 10 may further include a busbar component for achieving electrical connection between the plurality of battery cells 100 .
  • the battery 10 including the above-mentioned battery cell 100 is only described, and the battery 10 may also include other functional components, which will not be described in detail here.
  • the battery 10 includes the battery cell 100 provided in the above embodiment, the battery 10 at least includes all the technical effects of the above battery cell 100 , which will not be described in detail herein.
  • This embodiment provides an electrical device 1, which includes the battery 10 in the above embodiment, and the battery 10 is used to provide electrical energy.
  • the electrical device 1 since the electrical device 1 includes the battery 10 , it has at least all the beneficial effects of the battery 10 , which will not be described in detail herein.
  • the electric device 1 may be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc.
  • the electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc.
  • the spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.
  • the vehicle can be a fuel vehicle, a gas vehicle or a new energy vehicle.
  • the new energy vehicle can be a pure electric vehicle, a hybrid vehicle, or a A vehicle or an extended-range vehicle, etc.
  • a battery 10 is disposed inside the vehicle, and the battery 10 can be disposed at the bottom, head, or tail of the vehicle.
  • the battery 10 can be used to power the vehicle, for example, the battery 10 can be used as an operating power source for the vehicle.
  • the vehicle may also include a controller and a motor, and the controller is used to control the battery 10 to power the motor, for example, for starting, navigating, and operating power requirements of the vehicle during driving.
  • the battery 10 can be used not only as an operating power source for the vehicle, but also as a driving power source for the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.
  • a battery cell 100 is provided, and the battery cell 100 includes a shell 110, an electrode assembly 120, an isolation structure 170, and an insulating sheet 160.
  • the shell 110 has an inner cavity, and the shell 110 has a first wall 111, and the first wall 111 is specifically the bottom wall of the shell 110, and the first wall 111 is parallel to the X direction and the Y direction.
  • the electrode assembly 120 and the isolation structure 170 are both installed in the inner cavity, and at least part of the isolation structure 170 is located between the first wall 111 and the electrode assembly 120.
  • the isolation structure 170 is provided with a first through hole 150, and the first through hole 150 is provided in the region of the isolation structure 170 between the first wall 111 and the electrode assembly 120, and the first through hole 150 is provided through the isolation structure 170 along the Z direction.
  • the isolation structure 170 includes a baffle plate 140 and an insulating film 130, wherein the insulating film 130 is coated on the outside of the electrode assembly 120, and at least a portion of the insulating film 130 is located between the electrode assembly 120 and the first wall 111.
  • the insulating film 130 includes a first film layer 131 and a second film layer 132, wherein the first film layer 131 is located between the electrode assembly 120 and the first wall 111, and the second film layer 132 is coated on at least a portion of the circumferential side of the electrode assembly 120, and the first film layer 131 and the second film layer 132 are an integrated structure.
  • the insulating film 130 is a whole film layer
  • the second film layer 132 is divided into two parts, respectively referred to as the first sub-film layer and the second sub-film layer
  • the first sub-film layer and the second sub-film layer are respectively located on opposite sides of the first film layer 131, in the X direction
  • the first sub-film layer is respectively provided with a first folding edge 132a on both sides
  • the second sub-film layer is respectively provided with a second folding edge 132b on both sides
  • the first folding edge 132a and the second folding edge 132b are respectively provided
  • the first folding edge 132a and the second folding edge 132b are arranged one by one, and after folding, one of the first folding edges 132a and one of the second folding edges 132b have a partial overlapping area, and another first folding edge 132a and another second folding edge 132b have a partial overlapping area.
  • the number of insulating sheets 160 is the same as the number of first folding edges 132a.
  • the number of first folding edges 132a is two, and the number of insulating sheets 160 is also two, each insulating sheet 160 includes a first part 161 and a second part 162, and in the Y direction, the sizes of the first part 161 and the second part 162 are equal.
  • One of the second parts 162 fixes one of the first folded edges 132a and one of the second folded edges 132b, and the other second part 162 fixes the other first folded edge 132a and the other second folded edge 132b.
  • the distance between the second part 162 and the two side edges of the isolation structure 170 is equal, and the second part 162 is connected to the first folded edge 132a and the second folded edge 132b by gluing.
  • the second part 162 can play a good fixing role for both the first folded edge 132a and the second folded edge 132b.
  • the barrier is arranged between the insulating film 130 and the first wall 111, specifically between the first film layer 131 of the insulating film 130 and the first wall 111.
  • the first through hole 150 includes a first hole section 151 and a second hole section 152.
  • the first hole section 151 and the second hole section 152 are arranged opposite to each other and are connected to each other.
  • the first hole section 151 is arranged on the first film layer 131 of the insulating film 130, and the first hole section 151 penetrates the first film layer 131 of the insulating film 130.
  • the second hole section 152 is arranged on the baffle plate 140, and the second hole section 152 penetrates the baffle plate 140.
  • the number of the first through holes 150 is equal to the number of the insulating sheets 160. In this embodiment, the number of the insulating sheets 160 is two, and the number of the first through holes 150 is also two.
  • the first part 161 of the first insulating sheet 160 covers one first through hole 150, and the first part 161 of the other insulating sheet 160 covers the other first through hole 150. Specifically, the first portion 161 covers the side of the second hole segment 152 of the corresponding first through hole 150 away from the first hole segment 151 , that is, the first portion 161 is adhered to the side of the baffle plate 140 facing the first wall 111 and covers the corresponding first hole segment 151 .
  • a battery cell 100 is provided, and the battery cell 100 includes a shell 110, an electrode assembly 120, an isolation structure 170, and an insulating sheet 160.
  • the shell 110 has an inner cavity, and the shell 110 has a first wall 111, and the first wall 111 is specifically the bottom wall of the shell 110, and the first wall 111 is parallel to the X direction and the Y direction.
  • the electrode assembly 120 and the isolation structure 170 are both installed in the inner cavity, and at least part of the isolation structure 170 is located between the first wall 111 and the electrode assembly 120.
  • the isolation structure 170 is provided with a first through hole 150, and the first through hole 150 is arranged in the area of the isolation structure 170 between the first wall 111 and the electrode assembly 120, and the first through hole 150 is arranged along the Z direction through the isolation structure 170.
  • the isolation structure 170 includes a baffle 140, an insulating film 130, and a support block 180.
  • the insulating film 130 is coated on the outside of the electrode assembly 120, and at least a portion of the insulating film 130 is located between the electrode assembly 120 and the first wall 111.
  • the insulating film 130 includes a first film layer 131 and a second film layer 132, the first film layer 131 is located between the electrode assembly 120 and the first wall 111, and the second film layer 132 is coated on at least a portion of the circumferential side of the electrode assembly 120, and the first film layer 131 and the second film layer 132 are an integrated structure.
  • the insulating film 130 is a whole film layer
  • the second film layer 132 is divided into two parts, respectively referred to as the first sub-film layer and the second sub-film layer
  • the first sub-film layer and the second sub-film layer are respectively located on opposite sides of the first film layer 131, in the X direction
  • the first sub-film layer is respectively provided with a first folding edge 132a on both sides
  • the second sub-film layer is respectively provided with a second folding edge 132b on both sides
  • the first folding edge 132a and the second folding edge 132b are respectively provided
  • the first folding edge 132a and the second folding edge 132b are arranged one by one, and after folding, one of the first folding edges 132a and one of the second folding edges 132b have a partial overlapping area, and another first folding edge 132a and another second folding edge 132b have a partial overlapping area.
  • the number of insulating sheets 160 is the same as the number of first folding edges 132a.
  • the number of first folding edges 132a is two
  • the number of insulating sheets 160 is also two
  • each insulating sheet 160 includes a first part 161 and a second part 162, and in the Y direction, the sizes of the first part 161 and the second part 162 are equal.
  • One of the second parts 162 fixes one of the first folded edges 132a and one of the second folded edges 132b
  • the other second part 162 fixes the other first folded edge 132a and the other second folded edge 132b.
  • the barrier is disposed between the insulating film 130 and the first wall 111, specifically between the first film layer 131 of the insulating film 130 and the first wall 111, and the support block 180 is disposed on the side of the barrier plate 140 facing the first wall 111.
  • the support block 180 is provided with a second through hole 181, and the second through hole 181 of at least one support block 180 is disposed opposite to the first through hole 150, and the first part 161 covers the second through hole 181.
  • the first through hole 150 includes a first hole segment 151 and a second hole segment 152.
  • the first hole segment 151 and the second hole segment 152 are arranged opposite to each other and are connected to each other.
  • the first hole segment 151 is arranged on the first film layer 131 of the insulating film 130, and the first hole segment 151 penetrates the first film layer 131 of the insulating film 130.
  • the second hole segment 152 is arranged on the baffle plate 140, and the second hole segment 152 penetrates the baffle plate 140.
  • the first hole segment 151 and the second hole segment 152 are arranged in a one-to-one correspondence, and the second through hole 181 is arranged in a one-to-one correspondence with the second hole segment 152 of the corresponding first through hole 150.
  • the baffle plate 140 is provided with two second hole segments 152 of the first through hole 150, and the center line of the baffle plate 140 along the width direction is P1.
  • the two second hole segments 152 are both arranged in an area close to a side edge in the width direction of the baffle plate 140, that is, the two first through holes 150 are both located on the same side of P1.
  • the two support blocks 180 are both provided at positions opposite to the first through holes 150, and the second through holes 181 on the support blocks 180 are connected with the first through holes 150.
  • the other two support blocks 180 are not provided with the second through holes 181, and the other two support blocks 180 are provided in areas where the first through holes 150 are not provided.
  • the first part 161 of one insulating sheet 160 is pasted on the surface of the two support blocks 180 located on one side of the baffle plate 140 along the length direction away from the baffle plate 140, and the first part 161 covers the second through hole 181 on one of the support blocks 180.
  • the first part 161 of the other insulating sheet 160 is pasted on the surface of the two support blocks 180 located on the other side of the baffle plate 140 along the length direction away from the baffle plate 140, and the first part 161 covers the second through hole 181 on one of the support blocks 180.
  • the baffle plate 140 is provided with a third through hole 1411 along the Z-axis direction. The number of the third through holes 1411 is multiple, and the multiple third through holes 1411 are spaced apart. Between the two first through holes 150 .

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  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Secondary Cells (AREA)
  • Cell Separators (AREA)
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  • Battery Mounting, Suspending (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

一种电池单体、电池及用电装置,电池单体(100)包括外壳(110)、电极组件(120)、隔离结构(170)和绝缘片(160),外壳(110)具有内腔及第一壁(111),电极组件(120)设于内腔,隔离结构(170)至少部分位于第一壁(111)和电极组件(120)之间,隔离结构(170)设有第一通孔(150),绝缘片(160)包括第一部分(161),第一部分(161)遮盖第一通孔(150)。在电池单体(100)中,绝缘片(160)的第一部分(161)遮盖第一通孔(150),在一定程度上降低电极组件(120)一侧的粉末通过第一通孔(150)移动至第一壁(111)一侧的概率,从而可提升电池单体(100)的可靠性。

Description

电池单体、电池及用电装置
本申请要求于2023年3月31日提交的申请号为202310341097.1、申请名称为“电池单体、电池及用电装置”的申请的优先权,其内容通过引用结合在本申请中。
技术领域
本申请涉及电池技术领域,更具体地说,是涉及一种电池单体、电池及用电装置。
背景技术
在电池的生产过程中,在电极组件与外壳之间设置有隔离结构,在隔离结构上设置有通孔。电极组件一侧的粉末易从通孔移动至隔离结构与外壳之间,导致电池单体短路或者腐蚀。
发明内容
本申请实施例的目的在于提供一种电池单体、电池及用电装置,旨在解决现有技术中电池单体短路或腐蚀的技术问题。
为实现上述目的,本申请采用的技术方案是:
第一方面,提供一种电池单体,包括:
外壳,外壳具有内腔,外壳具有第一壁;
电极组件,设于内腔;
隔离结构,隔离结构设于第一壁与电极组件之间,隔离结构上设置有第一通孔;以及,
绝缘片,绝缘片包括第一部分,第一部分遮盖第一通孔。
在该种设置方式中,电极组件位于外壳内,隔离结构位于外壳的第一壁与电极组件之间,由于绝缘片遮盖第一通孔,因此绝缘片的设置可在一定程度上降低电极组件一侧的粉末通过第一通孔移动至第一壁一侧的概率,从而可提升电池单体的可靠性。
在一种可能的设计中,隔离结构设置有多个第一通孔,绝缘片遮盖所有第一通孔。
在该种设置方式中,由于绝缘片将所有第一通孔均进行遮盖,因此在第一通孔的数量为多个的情况下降低了电极组件一侧的粉末通过第一通孔移动至第一壁一侧的概率。
在一种可能的设计中,绝缘片的数量与第一通孔的数量相等,绝缘片与第一通孔一一对应设置,绝缘片遮盖对应的第一通孔;或者,绝缘片的数量为一个,一个绝缘片遮盖所有第一通孔。
在该种设置方式中,在对应一个第一通孔设置一个绝缘片的情况下,使得各绝缘片的尺寸相对较小,减小绝缘片的占用空间。在使用一个绝缘片遮盖所有第一通孔的情况下,绝缘片的装配效率较高。
在一种可能的设计中,第一部分粘贴在第一通孔的开口处。
在该种设置方式中,通过粘贴的方式固定第一部分,可使得第一部分对于第一通孔的遮盖效果更好。
在一种可能的设计中,第一部分位于隔离结构面向第一壁的一侧。
在该种设置方式中,在进行装配的过程中,可先将电极组件与隔离结构相连,然后将第一部分遮盖在隔离结构上,将第一部分设置在隔离结构面向第一壁的一侧,便于在隔离结构与电极组件连接后进行第一部分与隔离结构的连接操作。
在一种可能的设计中,隔离结构包括隔挡板和绝缘膜,隔挡板位于电极组件与第一壁之间,绝缘膜的至少部分位于电极组件与第一壁之间,第一通孔包括相对设置且连通的第一孔段和第二孔段,第一孔段设置于绝缘膜,第二孔段设置于隔挡板,第一部分遮盖在第一孔段远离第二孔段的一侧开口或第二孔段远离第一孔段的一侧开口处。
在该种设置方式中,由于绝缘膜上设置有第一孔段,隔挡板上设置有第二孔段,因此绝缘膜和隔挡板可通过第一孔段与第二孔段实现定位。由于第一部分遮盖在第一孔段远离第二孔段的一侧,或,第一部分遮盖在第二孔段远离第一孔段的一侧,因此可在绝缘膜与隔挡板连接之后进行第一部分的连接。
在一种可能的设计中,绝缘膜折叠包裹于电极组件,并于电极组件的侧边形成相互交叠的第一折边和第二折边,绝缘片包括第二部分,第二部分固定第一折边和第二折边,第一部分与第二部分相连。
在该种设置方式中,绝缘片不仅可遮盖第一通孔,还能够固定第一折边和第二折边。由于绝缘片包括相连的第一部分和第二部分,因此绝缘片与隔离结构之间的接触面积增大了,提高了绝缘片与隔离结构之间的连接稳定性。
在一种可能的设计中,在第一方向上,第二部分与隔离结构的第一方向上的至少一个边缘间隔设置,第一方向平行于第一壁的宽度方向。
在该种设置方式中,由于第二部分与隔离结构的至少一个边缘间隔设置,也即是说,在第一方向上,第二部分的尺寸小于隔离结构的尺寸,便于将第二部分平整贴覆在绝缘膜上,减小第二部分的占用空间。
在一种可能的设计中,在第一方向上,第二部分与隔离结构的两侧边缘之间的距离相等。
在该种设置方式中,第二部分粘贴在绝缘膜的中部区域,便于固定第一折边和第二折边。
在一种可能的设计中,在第一方向上,外壳的宽度为W1,第二部分的宽度为W2,0.1≤W2/W1≤0.9。
在该种设置方式中,第二部分的宽度可根据外壳的宽度进行设定,第二部分的宽度足以满足固定第一折边和第二折边。
在一种可能的设计中,0.25≤W2/W1≤0.75。
在该种设置方式中,第二部分的宽度在满足固定第一折边和第二折边的基础上,占用空间较小。
在一种可能的设计中,沿电极组件的高度方向,第二部分的尺寸为10mm-80mm。
在该种设置方式中,第二部分的高度可足以满足固定第一折边和第二折边。
在一种可能的设计中,沿电极组件的高度方向,第二部分的尺寸为15mm-50mm。
在该种设置方式中,第二部分的高度在满足固定第一折边和第二折边的基础上,占用空间较小。
在一种可能的设计中,隔挡板上仅设置有两个孔,隔挡板上的两个孔均为第一孔段;绝缘膜上仅设置有两个孔,绝缘膜上的两个孔均为第二孔段,两个第一孔段与两个第二孔段一一相对设置。
在该种设置方式中,在隔挡板上仅设置有第一孔段,而不设置有其他孔,在绝缘膜上仅设置有第二孔段,而不设置有其他孔,而第一孔段与第二孔段一一对应连通形成第一通孔,第一通孔由绝缘片的第一部分遮挡,因此使得隔挡板和绝缘片对于电极组件一侧的粉末的阻挡效果更好。
在一种可能的设计中,隔离结构还包括支撑块,隔挡板设置于绝缘膜与第一壁之间,支撑块设置于隔挡板面向第一壁的一侧;
第一通孔贯穿隔挡板和绝缘膜,支撑块设置于隔挡板上未设置有第一通孔的区域;或,
支撑块设置有第二通孔,至少一个支撑块的第二通孔与第一通孔相对设置,第一部分遮盖在第二通孔上。
在该种设置方式中,隔离结构上设置有支撑块,支撑块可提高隔离结构的结构强度。当支撑块设置在未设置有第一通孔的区域时,第一部分遮盖第一通孔即可,当支撑块设置在与第一通孔相对的区域时,由于支撑块上设置有第二通孔,第二通孔与第一通孔相对,因此可通过第一部分对于第二通孔的遮盖,实现第一部分对于第一通孔的遮盖,从而减少电极组件一侧的粉末经由第一通孔移动到第一壁一侧的概率。
第二方面,提供一种电池,包括上述技术方案提供的电池单体。
由于电池包括上述电池单体,因此至少具有上述电池单体的全部有益效果,在此不再赘述。
第三方面,提供一种用电装置,用电装置包括上述技术方案提供的电池,电池用于提供电能。
由于用电装置包括上述电池,因此至少具有上述电池的全部有益效果,在此不再赘述。
附图说明
为了更清楚地说明本申请实施例中的技术方案,下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本申请的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。
图1是本申请的一个实施例提供的用电装置的结构示意图;
图2是本申请的一个实施例提供的电池的结构示意图;
图3是本申请的第一个实施例提供的电池单体的零件爆炸图;
图4是图3中的电池单体中绝缘片和隔离结构的相对位置示意图;
图5是图4中绝缘片的结构示意图;
图6是图3中的电池单体中绝缘片的展开示意图;
图7是本申请第一个实施例提供的电池单体处于一视角下的结构示意图;
图8是本申请第一个实施例提供的电池单体处于另一视角下的结构示意图;
图9是本申请第二个实施例提供的电池单体中绝缘片和隔离结构的相对位置示意图;
图10是图9中绝缘片的结构示意图;
图11是本申请第二个实施例提供的电池单体处于一视角下的结构示意图;
图12是本申请第三个实施例提供的电池单体中绝缘片和隔离结构的相对位置示意图;
图13是图12中绝缘片的结构示意图;
图14是本申请第三个实施例提供的电池单体处于一视角下的结构示意图;
图15是本申请第四个实施例提供的电池单体中绝缘片和隔离结构的相对位置示意图;
图16是图15中绝缘片的结构示意图;
图17是本申请第四个实施例提供的电池单体处于一视角下的结构示意图;
图18是本申请第五个实施例提供的电池单体中绝缘片和隔离结构的相对位置示意图;
图19是本申请第五个实施例提供的电池单体处于一视角下的结构示意图;
图20是本申请第六个实施例提供的电池单体中绝缘片和隔离结构的相对位置示意图;
图21是本申请第六个实施例提供的电池单体处于一视角下的结构示意图;
图22是本申请第七个实施例提供的电池单体中绝缘片和隔离结构的相对位置示意图;
图23是本申请第七个实施例提供的电池单体处于一视角下的结构示意图;
图24是本申请第八个实施例提供的电池单体中绝缘片和隔离结构的相对位置示意图;
图25是本申请第八个实施例提供的电池单体处于一视角下的结构示意图;
图26是本申请第九个实施例提供的电池单体中绝缘片和隔离结构的相对位置示意图;
图27是本申请第九个实施例提供的电池单体处于一视角下的结构示意图。
上述附图所涉及的标号明细如下:
1、用电装置;
10、电池;20、控制机构;30、驱动机构;
100、电池单体;200、箱体;
101、顶盖贴片;102、顶盖;103、转接片;104、保护膜;
110、外壳;111、第一壁;
120、电极组件;122、极耳;
130、绝缘膜;131、第一膜层;132、第二膜层;132a、第一折边;132b、第二折边;
140、隔挡板;1411、第三通孔;
150、第一通孔;151、第一孔段;152、第二孔段;
160、绝缘片;161、第一部分;162、第二部分;
170、隔离结构;
180、支撑块;181、第二通孔。
具体实施方式
为了使本申请所要解决的技术问题、技术方案及有益效果更加清楚明白,以下结合附图及实施例,对本申请进行进一步详细说明。应当理解,此处所描述的具体实施例仅仅用以解释本申请,并不用于限定本申请。
在本申请实施例的描述中,术语“多个”指的是两个以上(包括两个)。
在本申请实施例的描述中,除非另有明确的规定和限定,技术术语“安装”“相连”“连接”“固定”等术语应做广义理解,例如,可以是固定连接,也可以是可拆卸连接,或成一体;也可以是机械连接,也可以是电连接;可以是直接相连,也可以通过中间媒介间接相连,可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言,可以根据具体情况理解上述术语在本申请实施例中的具体含义。
需要理解的是,术语“长度”、“宽度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系,仅是为了便于描述本申请和简化描述,而不是指示或暗示所指的电池单体或元件必须具有特定的方位、以特定的方位构造和操作,因此不能理解为对本申请的限制。
此外,术语“第一”、“第二”仅用于描述目的,而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此,限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征。在本申请的描述中,“多个”的含义是两个或两个以上,除非另有明确具体的限定。
本申请实施例中,电池单体可以为二次电池,二次电池是指在电池单体放电后可通过充电的方式使活性材料激活而继续使用的电池单体。电池单体可以为锂离子电池、钠离子电池、钠钾离子电池、锂金属电池钠金属电池、钾硫电池、镁离子电池、镍氢电池、镍镐电池、铅蓄电池等,本申请实施例对此并不限定。
作为示例,电池单体可以为圆柱形电池单体、棱柱电池单体、软包电池单体或其它形状的电池单体,棱柱电池单体包括方壳电池单体、刀片形申池单体、多棱柱电池,多棱柱电池例如为六棱柱电池等。
电池单体一般包括电极组件。电极组件包括正极、负极以及隔离件。在电池单体充放电过程中,活性离子(例如锂离子)在正极和负极之间往返嵌入和脱出。隔离件设置在正极和负极之间,可以起到防止正负极短路的作用同时可以使活性离子通过。
在一些实施例中,正极可以为正极片,正极片可以包括正极集流体以及设置在正极集流体至少一个表面的正极活性材料。
作为示例,正极集流体具有在其自身厚度方向相对的两个表面,正极活性材料设置在正极集流体相对的两个表面的任意一者或两者上。
作为示例,正极集流体可采用金属箔片或复合集流体。例如,作为金属箔片,可采用银表面处理的铝或不锈钢、不锈钢、铜、铝、镍、炭精电极、碳、镍或铁等。复合集流体可包括高分子材料基层和金属层。复合集流体可通过将金属材料(铝、铝合金、镍、镍合金、钦、钦合金、银及银合金等)形成在高分子材料基材(如聚丙烯、聚对苯二甲酸乙二醇酯、聚对苯二甲酸丁二醇酯、聚苯乙烯、聚乙烯等的基材)上而形成。
作为示例,正极活性材料可包括以下材料中的至少一种:含锂磷酸盐理过渡金属氧化物及其各自的改性化合物。但本申请并不限定于这些材料还可以使用其他可被用作电池正极活性材料的传统材料。这些正极活性材料可以仅单独使用一种,也可以将两种以上组合使用。其中,含锂磷酸盐的示例可包括但不限于磷酸铁锂(如LiFePO4(也可以简称为LFP))、磷酸铁锂与碳的复合材料、磷酸锰锂(如LiMnPO4)、磷酸锰锂与碳的复合材料、磷酸锰铁锂、磷酸锰铁锂与碳的复合材料中的至少一种。
在一些实施例中,正极可以采用泡沫金属。泡沫金属可以为泡沫镍、泡沫铜、泡沫铝、 泡沫合金、或泡沫碳等。泡沫金属作为正极时,泡沫金属表面可以不设置正极活性材料,当然也可以设置正极活性材料。作为示例,在泡沫金属内还可以填充或/和沉积有锂源材料、钾金属或钠金属,锂源材料为锂金属和/或富锂材料。
在一些实施例中,负极可以为负极片,负极片可以包括负极集流体。
作为示例,负极集流体可采用金属箔片、泡沫金属或复合集流体。例如,作为金属箔片,可以采用银表面处理的铝或不锈钢、不锈钢、铜、铝、镍、炭精电极、用碳、镍或钛等。复合集流体可包括高分子材料基层和金属层泡沫金属可以为泡沫镍、泡沫铜、泡沫铝、泡沫合金或泡沫碳等。复合集流体可通过将金属材料(铜、铜合金、镍、镍合金、钛、钛合金、银及银合金等)形成在高分子材料基材(如聚丙烯、聚对苯二甲酸乙二醇酯、聚对苯二甲酸丁二醇酯、聚苯乙烯、聚乙烯等的基材)上而形成。作为示例,负极集流体可采用金属箔片或复合集流体。例如,作为金属箔片,可以采用银表面处理的铝或不锈钢、不锈钢、铜、铝、镍、炭精电极、用碳、镍或钛等。复合集流体可包括高分子材料基层和金属层。复合集流体可通过将金属材料(铜、铜合金、镍、镍合金、铁、钛合金、银及银合金等)形成在高分子材料基材(如聚丙烯、聚对苯二甲酸乙二醇醋、聚对苯二甲酸丁二醇酯、聚苯乙烯、聚乙烯等的基材)上而形成。
作为示例,负极片可以包括负极集流体以及设置在负极集流体至少一个表面上的负极活性材料。
作为示例,负极集流体具有在其自身厚度方向相对的两个表面,负极活性材料设置在负极集流体相对的两个表面中的任意一者或两者上。
作为示例,负极活性材料可采用本领域公知的用于电池单体的负极活性材料。作为示例,负极活性材料可包括以下材料中的至少一种:人造石墨、天然石墨、软炭、硬炭、硅基材料、锡基材料和钛酸锂等。
在一些实施例中,负极可以采用泡沫金属。泡沫金属可以为泡沫镍、泡沫铜、泡沫铝、泡沫合金、或泡沫碳等。泡沫金属作为负极片时,泡沫金属表面可以不设置负极活性材料,当然也可以设置负极活性材料。
作为示例,在负极集流体内还可以填充或/和沉积有锂源材料、钾金属或钠金属,锂源材料为锂金属和/或富锂材料。
在一些实施例中,正极集流体的材料可以为铝,负极集流体的材料可以为铜。
在一些实施方式中,电极组件还包括隔离件,隔离件设置在正极和负极之间。
在一些实施方式中,隔离件为隔离膜。本申请对隔离膜的种类没有特别的限制,可以选用任意公知的具有良好的化学稳定性和机械稳定性的多孔结构隔离膜。
作为示例,隔离膜的主要材质可选自玻璃纤维、无纺布、聚乙烯、聚丙烯、聚偏二氟乙烯及陶瓷中的至少一种。
在一些实施方式中,隔离件为固态电解质。固态电解质设于正极和负极之间,同时起到传输离子和隔离正负极的作用。
在一些实施方式中,电池单体还包括电解质,电解质在正、负极之间起到传导离子的作用。本申请对电解质的种类没有具体的限制,可根据需求进行选择。电解质可以是液态的、凝胶态的或固态的。
在一些实施方式中,电极组件为卷绕结构。正极片、负极片卷绕成卷绕结构。
在一些实施方式中,电极组件为叠片结构。
作为示例,正极片、负极片可分别设置多个,多个正极片和多个负极片交替层叠设置。
作为示例,正极片可设置多个,负极片折叠形成多个层叠设置的折看段,相邻的折叠段之间夹持一个正极片。
作为示例,正极片和负极片均折叠形成多个层叠设置的折叠段。
作为示例,隔离件可设置多个,分别设置在任意相邻的正极片或负极片之间。
作为示例,隔离件可连续地设置,通过折叠或者卷绕方式设置在任意相邻的正极片或负极片之间。
在一些实施方式中,电极组件的形状可以为圆柱状,扁平状或多棱柱状等。
在一些实施方式中,电极组件设有极耳,极耳可以将电流从电极组件导出,极耳包括正极耳和负极耳。
在一些实施方式中,电池单体可以包括外壳。外壳用于封装电极组件及电解质等部件。
在一种示例中,外壳包括壳体和端盖组件,壳体具有开口,端盖组件盖合在壳体的开口处,以与壳体构成内腔,外壳可以为钢壳、铝壳、塑料壳、复合金属壳、或铝塑膜等。
端盖组件包括顶盖和顶盖贴片,顶盖贴片设置在顶盖远离壳体的一侧。顶盖上安装有电极端子,电极端子包括正极端子和负极端子,正极耳与正极端子连接,负极耳与负极端子连接。极耳与电极端子之间通过转接片连接。转接片用于防止在电极组件短路或过充过放时损坏电池或烧毁其他部件,从而能够保证电池使用的安全。
在电极组件与壳体之间设置有隔离结构,外壳的外侧贴覆有保护膜。
在一些实施方式中,外壳上设置有泄压机构,泄压机构用于泄放电池单体的内部压力。作为示例,电池单体的内部压力或温度达到预定阈值时致动以泄放内部压力或温度。当电池单体的内部压力或温度达到预定阈值时,泄压机构执行动作或者泄压机构中设有的薄弱结构被破坏,从而形成可供内部压力或温度泄放的开口或通道。该阈值设计根据设计需求不同而不同。所述阈值可能取决于电池单体中的正极片、负极片、电解质和隔离件中一种或几种的材料。作为示例,泄压机构可以与外壳一体成型。作为示例,泄压机构也可以与外壳分体设置并连接本申请中所提到的“致动”是指泄压机构产生动作或被激活至一定的状态,从而使得电池单体的内部压力及温度得以被泄放。泄压机构产生的动作可以包括但不限于:泄压机构中的部件移动形成排气通道、泄压机构中的至少一部分破裂、破碎、被撕裂或者打开,等等。泄压机构在致动时,电池单体的内部的高温高压物质作为排放物会从致动的部位向外排出。以此方式能够在可控压力或温度的情况下使电池单体发生泄压及泄温,从而避免潜在的更严重的事故发生。本申请实施例中所提到的来自电池单体的排放物包括但不限于:电解质、被溶解或分裂的正负极片、隔离件的碎片、反应产生的高温高压气体、火焰等。
本申请的实施例所提到的电池可以包括一个或多个电池单体以提供更高的电压和容量的单一的物理模块。电池单体有多个时,多个电池单体通过汇流部件串联、并联或混联。
在一些实施例中,电池可以为电池模块,电池单体有多个时,多个电池单体排列并固定形成一个电池模块。
在一些实施例中,电池可以为电池包,电池包包括箱体和电池单体,电池单体或电池模块容纳于箱体中。
在一些实施例中,箱体可以作为车辆的底盘结构的一部分。例如,箱体的部分可以成为车辆的地板的至少一部分,或者,箱体的部分可以成为车辆的横梁和纵梁的至少一部分。
在一些实施例中,电池可以为储能装置。储能装置包括储能集装箱、储能电柜等。
近些年,新能源汽车有了飞跃式的发展,在电动汽车领域,动力电池作为电动汽车的动力源,起着不可替代的重要作用。电池由箱体和容纳于箱体内的多个电池单体组成。其中,电池作为新能源汽车核心零部件不论在安全性方面,还是循环使用寿命上均有着较高的要求。
相关设计中,为了实现隔离结构两侧的气流流通,或者为了便于隔离结构的定位安装,在隔离结构上设置有通孔,通孔的设置在隔离结构的两侧形成了通道,使得电极组件一侧的粉末(例如阳极粉末)经由通孔能够移动到隔离结构另一侧,粉末与位于隔离结构另一侧的外壳接触易使得电池单体发生短路或腐蚀的现象。示例性地,隔离结构包括绝缘膜和底托板,绝缘膜和底托板上均设置有通孔,且绝缘膜上的通孔和底托板上的通孔相对设置,以用于进行绝缘膜和底托板的定位操作,便于进行绝缘膜和底托板的连接。但是在完成绝缘膜和底托板的连接后,绝缘膜上的通孔和底托板上的通孔连通以形成通道,使得粉末由电极组件一侧经由通道移动至隔离结构的另一侧,与外壳接触,从而易使得电池单体发生短路,影响电池单体的使用稳定性。
基于以上考虑,为了解决上述问题,设计了一种电池单体。电池单体包括外壳、电极组件、隔离结构和绝缘片,隔离结构位于电极组件与外壳的第一壁之间,隔离结构上设置有第一通孔,绝缘片遮盖第一通孔。由于第一通孔被遮挡,因此使得电极组件一侧的粉末经由通孔能够移动到隔离结构另一侧。
本实施例提供的电池单体能够用于电池,电池能够用于用电装置,用电装置包括但不限于:手机、便携式设备、笔记本电脑、电瓶车、电动车辆、轮船、航天器、电动玩具和电动工具等等,例如,航天器包括飞机、火箭、航天飞机和宇宙飞船等等,电动玩具包括固定式或移动式的电动玩具,例如,游戏机、电动车辆玩具、电动轮船玩具和电动飞机玩具等等,电动工具包括金属切削电动工具、研磨电动工具、装配电动工具和铁道用电动工具,例如,电钻、电动砂轮机、电动扳手、电动螺丝刀、电锤、冲击电钻、混凝土振动器和电创。用电装置包括但不限于:手机、便携式设备、笔记本电脑、电瓶车、电动车辆、轮船、航天器、电动玩具和电动工具等等,例如,航天器包括飞机、火箭、航天飞机和宇宙飞船等等,电动玩具包括固定式或移动式的电动玩具,例如,游戏机、电动车辆玩具、电动轮船玩具和电动飞机玩具等等,电动工具包括金属切削电动工具、研磨电动工具、装配电动工具和铁道用电动工具,例如,电钻、电动砂轮机、电动扳手、电动螺丝刀、电锤、冲击电钻、混凝土振动器和电刨。
请参阅图1和图2,为方便描述,本示例中的以车辆作为用电装置1为例,车辆可以为燃油汽车、燃气汽车或新能源汽车,新能源汽车可以是纯电动汽车、混合动力汽车或增程序汽车等。车辆的内部可以设置驱动机构30控制机构20以及电池10,驱动机构30可以为马达等,控制机构20用来控制电池10为驱动机构30供电。例如,在车辆的底部或车头或车尾可以设置电池10。电池10可以用于车辆的其他设备供电,例如,电池10可以作为车辆的操作电源,用于车辆的电路系统,例如,用于车辆的启动、导航和运行时的工作用电需求。在另一示例中,电池10不仅仅可以作为车辆的操作电源,还可以作为车辆的驱动电 源,替代或部分地替代燃油或天然气为车辆提供驱动动力。本示例中的车辆采用上述电池10,通过提升电池10的可靠性,能够有助于提高用电装置1的可靠性。
请参阅图3至图8,本实施例提供了一种电池单体100包括外壳110、电极组件120、隔离结构170和绝缘片160,其中,外壳110具有内腔,且外壳110具有第一壁111,电极组件120设于内腔,隔离结构170设于第一壁111与电极组件120之间,隔离结构170位于第一壁111与电极组件120之间的部分上设置有第一通孔150,绝缘片160包括第一部分161,第一部分161遮盖第一通孔150。
外壳110形成电池单体100的外部壳体结构,外壳110至少局部中空以形成内腔,外壳110具有第一壁111,第一壁111为外壳110的其中一个壁面,第一壁111可以为外壳110的底壁、顶壁或侧壁中的至少一个。外壳110可以为铝壳或其他材质。
在一些示例中,外壳110包括壳体和端盖组件,壳体外侧贴有保护膜104,壳体具有开口,端盖组件盖合在壳体的开口处,以与壳体构成内腔,壳体可以为钢壳、铝壳、塑料壳、复合金属壳、或铝塑膜等。第一壁111可以位于壳体上,也可以位于端盖组件上。电极组件120安装在内腔,电极组件120可以为卷绕式结构,也可以为叠片式结构。电极组件120,电极组件120可以通过壳体的开口放入内腔。电极组件120包括极耳122,极耳122包括正极耳和负极耳。端盖组件包括顶盖102和顶盖贴片101,顶盖贴片101设置在顶盖102远离壳体的一侧。顶盖102上安装有端子,电极端子包括正极端子和负极端子,正极耳与正极端子连接,负极耳与负极端子连接。极耳122与电极端子之间通过转接片103连接。转接片103用于防止在电极组件120短路或过充过放时损坏电池10或烧毁其他部件,从而能够保证电池使用的安全。
电极组件120安装于内腔,电极组件120可以为卷绕式结构,也可以为叠片式结构。电极组件120可以通过外壳110上的开口放入外壳110的内腔。
隔离结构170安装于内腔,并至少部分位于第一壁111与电极组件120之间,隔离结构170用于在第一壁111与电极组件120之间产生阻挡,以使电极组件120不能接触到第一壁111。隔离结构170可为绝缘材质制成。
由于隔离结构170阻隔在电极组件120与外壳110的第一壁111之间,因此可以降低电极组件120短路的可能性,有助于提升电池单体100的可靠性。由于隔离结构170的阻挡,即使外壳110产生一定的变形,隔离结构170也能够对第一壁111与电极组件120进行隔离,进而降低电极组件120与第一壁111相接触而导致的短路等问题。
隔离结构170可采用绝缘材质制成。
本示例中的隔离结构170至少部分位于第一壁111与电极组件120之间,隔离结构170上设置有第一通孔150,第一通孔150设置在隔离结构170位于第一壁111与电极组件120之间的区域。第一通孔150贯穿隔离结构170设置。第一通孔150可用于隔离结构170在装配过程中的定位,例如,第一通孔150可用于供定位结构穿过,以通过定位结构对隔离结构170的安装位置进行定位,以便于隔离结构170的安装;或者,在隔离结构170包括多个部件时,第一通孔150贯穿其中至少两个部件,第一通孔150供定位结构穿过,以对于隔离结构170中贯穿设置有第一通孔150的至少两个部件进行对位,以便于隔离结构170自身的装配。
在本实施例中附图中,电池单体100的长度方向以X方向示出,宽度方向以Y方向示 出,高度方向以Z方向示出。X方向、Y方向和Z方向两两垂直,X方向、Y方向和Z方向并非指向于单一方向或单一位置的方向,平行于X方向的方向即均称之为X方向,平行于Y方向即均称之为Y方向,平行于Z方向即均称之为Z方向。
示例性地,X方向与Y方向均平行于第一壁111,第一通孔150沿Z方向贯穿隔离结构170。
绝缘片160的第一部分161用于遮盖第一通孔150,以隔断第一通孔150两侧的流通,从而可在一定程度上减少甚至避免电极组件120一侧的粉末经由第一通孔150移动至第一壁111一侧。示例性地,第一部分161可设置在隔离结构170靠近于第一壁111的一侧,并遮盖第一通孔150;第一部分161可设置在隔离结构170靠近于电极组件120的一侧,并遮盖第一通孔150;或者,第一部分161还可至少部分伸入至第一通孔150内,以对第一通孔150进行封堵,从而遮盖第一通孔150。第一通孔150用于隔离结构170的定位安装,在隔离结构170完成定位后,在第一通孔150处遮盖第一部分161,从而阻隔第一通孔150的流通。第一部分161遮盖第一通孔150指的是第一部分161与第一通孔150的投影重叠,或者说,在平行于第一壁111的平面内,第一通孔150的投影完全位于第一部分161的投影内。
在该种设置方式中,电极组件120位于外壳110内,隔离结构170位于外壳110的第一壁111与电极组件120之间,由于绝缘片160遮盖第一通孔150,因此绝缘片160的设置可在一定程度上降低电极组件120一侧的粉末通过第一通孔150移动至第一壁111一侧的概率,从而可提升电池单体100的可靠性。
绝缘片160可采用膜层结构,其厚度相对较小,占用空间较小。示例性地,绝缘片160的厚度可为0.01mm-0.5mm,例如,绝缘片160的厚度可为0.01mm、0.02mm、0.03mm、0.04mm、0.05mm、0.1mm、0.12mm、0.15mm、0.18mm、0.2mm、0.25mm、0.3mm、0.35mm、0.4mm、0.42mm、0.48mm、0.5mm等。绝缘片160的厚度即为绝缘片160面向隔离结构170的一侧与相对的另一侧之间的垂直距离。位于第一壁111与隔离结构170之间的第一部分161的厚度即为第一部分161在Z方向上的尺寸。在该尺寸范围内,绝缘片160具有足够的结构强度,以阻挡粉末或液体通过,从而遮盖第一通孔150,且该尺寸范围内,绝缘片160的厚度相对较小,占用空间较小,且质量较轻。
在一种可能的设计中,隔离结构170设置有多个第一通孔150,绝缘片160遮盖所有第一通孔150。
为实现更为稳定的定位,在隔离结构170上设置有多个第一通孔150,多个第一通孔150均设置在隔离结构170位于第一壁111和电极组件120之间的区域,且多个第一通孔150间隔设置。多个第一通孔150能够供多个定位结构穿过,以通过多个定位结构对于隔离结构170进行定位,定位效果更好,稳定性更高。在定位完成后,使得绝缘片160遮盖所有第一通孔150,因此使得在电池单体100装配完成后,所有的第一通孔150均被绝缘片160遮挡,从而使得任何一个第一通孔150均被阻隔,以避免粉末经由某一个或多个第一通孔150移动到隔离结构170的另一侧。在该种设置方式中,由于绝缘片160将所有第一通孔150均进行遮盖,因此在第一通孔150的数量为多个的情况下降低了电极组件120一侧的粉末通过第一通孔150移动至第一壁111一侧的概率。
在一种可选实施方式中,绝缘片160的数量与第一通孔150的数量相等,绝缘片160 与第一通孔150一一对应设置,绝缘片160遮盖对应的第一通孔150;或者,绝缘片160的数量为一个,一个绝缘片160遮盖所有第一通孔150。
也即是说,在第一通孔150的数量为多个的情况下,绝缘片160的数量可以为一个或多个,如图9至图14所示,当绝缘片160的数量为一个时,绝缘片160能遮挡所有第一通孔150。如图7和图8、图15至图17所示,当绝缘片160的数量为多个时,一个绝缘片160可用于遮挡一个或几个第一通孔150。
示例性地,第一通孔150的数量为四个,绝缘片160的数量可为一个、两个、三个或四个,绝缘片160的数量为一个时,该绝缘片160遮挡四个第一通孔150。当绝缘片160的数量为两个时,可以通过一个绝缘片160遮挡一个第一通孔150,另一个绝缘片160遮挡三个第一通孔150,或者两个绝缘片160中,每个绝缘片160都分别遮挡两个第一通孔150。当绝缘片160的数量为三个时,其中一个绝缘片160遮挡两个第一通孔150,另外两个绝缘片160分别遮挡一个第一通孔150。当绝缘片160的数量为四个时,每个绝缘片160对应遮挡一个第一通孔150。
如图7和图8所示,在一种可选实施方式中,绝缘片160的数量与第一通孔150的数量相等,绝缘片160与第一通孔150一一对应设置,绝缘片160遮盖对应的第一通孔150。示例性地,第一通孔150的数量为两个时,绝缘片160的数量为两个,一个绝缘片160的第一部分161遮盖一个第一通孔150,另一个绝缘片160的第一部分161遮盖另一个第一通孔150。在该种设置方式中,由于一个绝缘片160仅需遮挡一个第一通孔150即可,因此绝缘片160的尺寸相对较小,减小绝缘片160的占用空间。
绝缘片160可为绝缘胶带(例如绝缘蓝胶)、绝缘膜130(例如绝缘蓝膜)或其他能够起到绝缘效果的材料制成。
在一种可能的设计中,第一部分161可采用热熔的方式与隔离结构170连接,并遮盖在第一通孔150处。
或者,在另一种可能的设计中,第一部分161粘贴在第一通孔150的开口处。
由于第一通孔150贯穿隔离结构170,因此第一通孔150具有两个开口,其中一个开口邻近于第一壁111,另一个开口邻近于电极组件120。绝缘片160的第一部分161可粘贴在第一通孔150临近于第一壁111的开口处,也可粘贴在第一通孔150邻近于电极组件120的开口处。
在该种设置方式中,第一部分161通过粘贴的方式固定在隔离结构170上,且覆盖第一通孔150,粘贴的方式便于固定第一部分161,且可使得第一部分161与隔离结构170之间的连接更为紧密,遮挡效果更好。
第一部分161可本身具有胶层,例如,绝缘片160为绝缘胶带,其一侧为无胶表面,另一侧为有胶表面,绝缘片160的有胶表面一侧粘贴在隔离结构170上,且绝缘片160的第一部分161遮盖第一通孔150。或者,第一部分161可本身不具有胶层,而是通过胶质粘贴在隔离结构170上。
绝缘片160可位于隔离结构170远离第一壁111而靠近电极组件120的一侧,也可位于隔离结构170面向第一壁111而远离电极组件120的一侧。在一些示例中,第一部分161位于隔离结构170面向第一壁111的一侧。在该种设置方式中,在进行装配的过程中,可先将电极组件120与隔离结构170相连,然后将第一部分161遮盖在隔离结构170上,将 第一部分161设置在隔离结构170面向第一壁111的一侧,便于在隔离结构170与电极组件120连接后进行第一部分161与隔离结构170的连接操作。由于第一部分161设置在隔离结构170面向第一壁111的一侧,因此在将第一部分161与隔离结构170固定连接时,操作空间更大,便于操作。
在一种可能的设计中,如图4、图9、图12和图15所示,隔离结构170包括隔挡板140和绝缘膜130,隔挡板140位于电极组件120与第一壁111之间,绝缘膜130的至少部分位于电极组件120与第一壁111之间,第一通孔150包括相对设置且连通的第一孔段151和第二孔段152,第一孔段151设置于绝缘膜130,第二孔段152设置于隔挡板140,第一部分161遮盖在第一孔段151远离第二孔段152的一侧开口或第二孔段152远离第一孔段151的一侧开口处。
绝缘膜130包覆在电极组件120的外侧,且绝缘膜130的至少部分位于电极组件120与第一壁111之间,隔挡板140位于电极组件120与第一壁111之间。隔挡板140可设置在绝缘膜130与电极组件120之间,隔挡板140也可设置在绝缘膜130与第一壁111之间。
第一通孔150包括第一孔段151和第二孔段152,第一孔段151与第二孔段152相对设置且相互连通,第一孔段151设置在绝缘膜130上,第一孔段151贯穿绝缘膜130,第二孔段152设置在隔挡板140上,第二孔段152贯穿隔挡板140。第一孔段151的截面形状可与第二孔段152的截面形状相同或不相同,第一孔段151和第二孔段152可分别为圆孔、椭圆孔、跑道孔、多边形孔等形状。第一孔段151的截面形状和第二孔段152的截面形状均为在平行于第一壁111的截面中的形状。
在该种设置方式中,由于绝缘膜130上设置有第一孔段151,隔挡板140上设置有第二孔段152,因此绝缘膜130和隔挡板140可通过第一孔段151与第二孔段152实现定位,在进行绝缘膜130和隔挡板140的定位过程中,将定位就结构先穿过第一孔段151然后伸入第二孔段152,或者将定位结构先穿过第二孔段152然后伸入第一孔段151,通过定位结构与第一孔段151之间的配合实现定位结构与绝缘膜130之间的相对限位,通过定位结构与第二孔段152之间的配合实现定位结构与隔挡板140之间的相对定位,由于同一个定位结构依次穿设于第一孔段151和第二孔段152,因此通过该定位结构使得绝缘膜130和隔挡板140相对定位。第一部分161遮盖在第一孔段151远离第二孔段152的一侧,或,第一部分161遮盖在第二孔段152远离第一孔段151的一侧,由于第一孔段151与第二孔段152连通,因此遮盖第一孔段151和第二孔段152那个任一者,即可通过第一部分161将第一通孔150的连通阻断。由于第一通孔150用于绝缘膜130与隔挡板140的定位安装,因此在绝缘膜130与隔挡板140连接之后,无需再使用第一通孔150,因而在绝缘膜130与隔挡板140连接之后进行第一部分161的连接,将第一部分161遮盖在第一孔段151或者第二孔段152处,从而将第一通孔150遮盖。
在一种可能的设置中,如图3、图4和图6所示,绝缘膜130包括第一膜层131和第二膜层132,第一膜层131位于电极组件120与第一壁111之间,第二膜层132包覆在电极组件120的至少部分周向侧面,第一膜层131和第二膜层132可为独立结构而后连接在一起,也可为一体结构。在第一膜层131与第二膜层132为独立结构时,第二膜层132可为一体式结构也可为分体结构,第二膜层132为分体结构时,第二膜层132包括多个子膜层,不同子膜层分别包覆在电极组件120的不同侧面的外侧,相邻的子膜层的边缘连接。
示例性地,绝缘膜130为一整张膜层,也即第一膜层131和第二膜层132为一体结构,在折叠后包覆在电极组件120的多个侧面,位于电极组件120与第一壁111之间的部分即为第一膜层131,围设包覆在电极组件120外侧一周的部分即为第二膜层132。
如图12至图17所示,在一种可能的设计中,绝缘片160仅包括第一部分161。
或者,在另一种可能的设计中,绝缘膜130折叠包裹于电极组件120,并于电极组件120的侧边形成相互交叠或者相互连接的第一折边132a和第二折边132b,绝缘片160包括第二部分162,第二部分162固定第一折边132a和第二折边132b,第一部分161与第二部分162相连。
示例性地,如图6所示,图6中虚线即为折叠印痕,绝缘膜130为一整张膜层,第二膜层132分为两部分,分别称为第一子膜层和第二子膜层,第一子膜层和第二子膜层分别位于第一膜层131的相对两侧,在X方向上,第一子膜层的两侧分别设置有第一折边132a,第二子膜层的两侧分别设置有第二折边132b,第一折边132a与第二折边132b一一对应设置,在折叠后,其中过一个第一折边132a与其中一个第二折边132b存在部分重叠区域,第二部分162固定该第一折边132a和第二折边132b。另一个第一折边132a与另一个第二折边132b存在部分重叠区域,第二部分162固定该第一折边132a和第二折边132b。
在该种设置方式中,绝缘片160不仅可遮盖第一通孔150,还能够固定第一折边132a和第二折边132b。由于绝缘片160包括相连的第一部分161和第二部分162,因此绝缘片160与隔离结构170之间的接触面积增大了,提高了绝缘片160与隔离结构170之间的连接稳定性。
当第一折边132a和第二折边132b的数量分别有多个时,绝缘片160的数量可为一个或多个,当绝缘片160的数量为一个时,第一部分161的数量为一个,第二部分162的数量与第一折边132a的数量相同,各第二部分162均与同一个第一部分161相连。示例性地,第一折边132a和第二折边132b的数量均为两个,如图9和图10所示,绝缘片160的数量为一个,第一部分161的数量为一个,第二部分162的数量为两个,两个第二部分162分别用于固定对应的一组第一折边132a和第二折边132b。
当绝缘片160的数量为多个且小于第一折边132a的数量时,一个绝缘片160包括一个第一部分161和若干第二部分162,第二部分162的数量小于第一折边132a的数量,多个绝缘片160的第二部分162的数量和与第一折边132a的数量相等。不同绝缘片160的第二折边132b的数量可相同也可不同。例如,第一折边132a的数量为四个,则第二折边132b的数量为四个,绝缘片160的数量为两个时,可其中一个绝缘片160包括一个第一部分161和三个第二部分162,另一个绝缘片160包括一个第一部分161和一个第二部分162,也可两个绝缘片160均包括一个第一部分161和两个第二部分162。
当绝缘片160的数量与第一折边132a的数量相同时,绝缘片160包括一个第一部分161和一个第二部分162,示例性地,如图4和图5所示,第一折边132a的数量为两个,绝缘片160的数量为两个,每个绝缘片160均包括一个第一部分161和一个第二部分162,其中一个第二部分162固定其中一个第一折边132a和一个第二折边132b,另一个第二部分162固定另一个第一折边132a和另一个第二折边132b。
第二部分162可贴覆在绝缘膜130上,以固定第一折边132a和第二折边132b,也即是说,第二部分162与第一折边132a和第二折边132b之间通过胶粘的方式连接。第一折边 132a与第二折边132b存在部分重叠区域,第二部分162的部分粘贴在第一折边132a上,部分粘贴在第二折边132b上,从而固定第一折边132a和第二折边132b。由于第一折边132a与第二折边132b存在部分重叠区域,因此可提高第一折边132a与第二折边132b对于电极组件120的包覆效果。
在一种可能的设计中,在第一方向上,第二部分162与隔离结构170的第一方向上间隔设置的两个边缘中的至少一个边缘间隔设置,第一方向平行于第一壁111的宽度方向。第一方向为Y方向。第二部分162与隔离结构170的至少一个边缘间隔设置,在第一方向上,隔离结构170的一个侧面具有相对的两个边缘,第二部分162可与其中一个边缘间隔设置,或者,第二部分162与隔离结构170的两个边缘之间均具有间隔。
在该种设置方式中,由于第二部分162与隔离结构170的至少一个边缘间隔设置,也即是说,在第一方向上,第二部分162的尺寸小于隔离结构170的尺寸,便于将第二部分162平整贴覆在绝缘膜130上,减小第二部分162的占用空间。
在一种可能的设计中,在第一方向上,第二部分162与隔离结构170的两侧边缘之间的距离相等。也即是说,在隔离结构170的一侧面中,第二部分162居中设置,在第一折边132a与第二折边132b的接缝位于电极组件120的非边缘区域的情况下,第二部分162可对于第一折边132a和第二折边132b均起到较好的固定作用。在该种设置方式中,第二部分162粘贴在绝缘膜130的中部区域,便于固定第一折边132a和第二折边132b。同时,由于将第二部分162设置在隔离结构170的一侧的中部区域,因此第二部分162的两侧边缘均贴合在隔离结构170的该侧面,便于提高第二部分162的贴合平整度。
在一些实施方式,第一部分161和第二部分162等宽,也即是说,在第一方向上,第一部分161的尺寸与第二部分162的尺寸相等。示例性地,绝缘片160为矩形条状结构,其在隔离结构170的一侧粘贴第一折边132a和第二折边132b后,弯折后粘贴在隔离结构170朝向第一壁111的一侧,且遮盖第一通孔150。粘贴在第一折边132a和第二折边132b的部分即为第二部分162,粘贴在隔离结构170面向第一壁111的部分即为第一部分161。
在一些实施方式中,如图7和图8所示,在第一方向上,外壳110的宽度为W1,第二部分162的宽度为W2,0.1≤W2/W1≤0.9。外壳110的宽度即为在第一方向上外壳110的尺寸,第二部分162的宽度即为在第一方向上第二部分162的尺寸。也即是说,第二部分162的宽度最小为外壳110宽度的0.1倍,第二部分162的宽度最大为外壳110宽度的0.9倍。由上可知,第二部分162的宽度设置范围与外壳110的宽度相关。在该种设置方式中,第二部分162的宽度可根据外壳110的宽度进行设定,由于第二部分162的宽度在外壳110的宽度的0.1倍或以上,因此第二部分162的宽度足以满足固定第一折边132a和第二折边132b。由于第二部分162的宽度在外壳110的宽度的0.9倍或以下,因此第二部分162可以完全平铺设置在隔离结构170的侧面,平整度较高,占用空间较小。示例性地,第二部分162的宽度可为外壳110的宽度的0.1倍、0.2倍、0.3倍、0.4倍、0.5倍、0.6倍、0.7倍、0.8倍、0.9倍等。示例性地,在外壳110的宽度为100mm时,第二部分162的宽度范围为10mm-90mm,例如10mm、15mm、20mm、25mm、35mm、40mm、48mm、50mm、60mm、70mm、78mm、80mm、90mm等。
在一些实施方式中,0.25≤W2/W1≤0.75。也即是说,第二部分162的宽度最小为外壳110宽度的0.25倍,如此可以增加与第一折边132a和第二折边132b的接触面积,从而提高 对于第一折边132a和第二折边132b的固定效果;第二部分162的宽度最大为外壳110宽度的0.75倍,如此在第二部分162的宽度在满足固定第一折边132a和第二折边132b的基础上,占用空间较小。示例性地,第二部分162的宽度可为外壳110的宽度的0.1倍、0.2倍、0.3倍、0.4倍、0.5倍、0.6倍、0.7倍、0.8倍、0.9倍等。示例性地,在外壳110的宽度为100mm时,第二部分162的宽度范围为25mm-75mm,例如25mm、28mm、30mm、37mm、42mm、47mm、52mm、55mm、65mm、72mm或75mm等。
在一些实施方式中,如图8所示,沿电极组件120的高度方向,第二部分162的尺寸为10mm-80mm。也即是说,在Z方向上,第二部分162的尺寸为10mm-80mm,示例性地,第二部分162可为10mm、20mm、25mm、30mm、35mm、40mm、45mm、55mm、60mm、65mm、70mm、75mm或80mm等。在该种设置方式中,第二部分162的高度可足以满足固定第一折边132a和第二折边132b。
在一些实施例中,沿电极组件120的高度方向,第二部分162的尺寸为15mm-50mm。也即是说,在Z方向上,第二部分162的尺寸为15mm-50mm。示例性地,第二部分162可为15mm、17mm、22mm、27mm、32mm、38mm、42mm、48mm或50mm等。在该种设置方式中,第二部分162与第一折边132a和第二折边132b的接触面积相对更大,对于第一折边132a和第二折边132b的固定效果相对更好,同时在满足固定第一折边132a和第二折边132b的基础上,第二部分162在隔离结构170的侧面占用空间相对较小。
在一些实施例中,隔离结构170包括隔挡板140和绝缘膜130,隔挡板140位于电极组件120与第一壁111之间,绝缘膜130的至少部分位于电极组件120与第一壁111之间,第一通孔150包括相对设置且连通的第一孔段151和第二孔段152,第一孔段151设置于绝缘膜130,第二孔段152设置于隔挡板140。示例性地,第一通孔150的数量为两个,则第一孔段151的数量为两个,且第二孔段152的数量为两个,两个第一孔段与两个第二孔段一一相对设置,且一一相对连通,在第一孔段151远离第二孔段152的一侧开口或第二孔段152远离第一孔段151的一侧开口处均遮盖有第一部分161。
在一种具体实施方式中,隔挡板140上仅设置有两个孔,隔挡板140上的两个孔均为第一孔段151;绝缘膜130上仅设置有两个孔,绝缘膜130上的两个孔均为第二孔段152。也即是说,隔挡板140上有且仅有两个孔,该两个孔均为第一孔段151,在隔挡板140上,除了第一孔段151之外,不再设置有其他任何贯穿隔挡板140的孔。在绝缘膜130上有且仅有两个孔,该两个孔均为第二孔段152,在绝缘膜130上,除了第二孔段152之外,不再设置有其他任何贯穿绝缘膜130的孔。第一孔段151和第二孔段152可用于实施隔挡板140和绝缘膜130的定位,两个第一孔段151和两个第二孔段152可提供较好的定位精度。在完成隔挡板140和绝缘膜130的定位后,第一孔段151和第二孔段152中至少一者被第一部分161遮盖,也即使得由第一孔段151和第二孔段152连通形成的第一通孔150被遮盖,第一部分161将隔挡板140和绝缘膜130上的孔全部遮盖,从而使得隔挡板和绝缘片对于电极组件一侧的粉末的阻挡效果更好。
如图18和图19所示,在一种可能的设计中,隔离结构170还包括支撑块180,隔挡板140设置于绝缘膜130与第一壁111之间,支撑块180设置于隔挡板140面向第一壁111的一侧;在一种设置方式中,支撑块180设置在隔挡板140上未设置有第一通孔150的区域;在另一种设置方式中,支撑块180设置有第二通孔181,至少一个支撑块180的第二通孔 181与第一通孔150相对设置,第一部分161遮盖在第二通孔181上。
支撑块180的数量为一个或多个,当支撑块180的数量为一个时,支撑块180的可设置在隔挡板140上设置有第一通孔150的区域,也可设置在隔挡板140上未设置有第一通孔150的区域,当支撑块180设置在隔挡板140上设置有第一通孔150的区域时,支撑块180上设置有与第一通孔150相连通的第二通孔181。当支撑块180设置在隔挡板140上未设置有第一通孔150的区域时,支撑块180上可设置有第二通孔181,也可不设置有第二通孔181。当支撑块180的数量为多个时,所有支撑块180均可设置在隔挡板140上设置有第一通孔150的区域,也可均设置在隔挡板140上未设置有第一通孔150的区域,还可存在部分支撑块180设置在隔挡板140上设置有第一通孔150的区域,另外部分支撑块180设置在隔挡板140上未设置有第一通孔150的区域。当所有支撑块180均设置在设置有第一通孔150的区域时,所有支撑块180上均设置有第二通孔181,第二通孔181与第一通孔150一一对应连通,第一部分161遮盖在所有第二通孔181上。当支撑块180中仅部分设置在隔挡板140上设置有第一通孔150的区域时,遮盖第一通孔150的支撑块180上设置有第二通孔181,以通过第二通孔181与第一通孔150连通,而其他未设置在第一通孔150处的支撑块180上可设置有第二通孔181,也可不设置有第二通孔181。当所有支撑块180均设置在隔挡板140上不设置有第一通孔150的区域时,支撑块180上可不设置有第二通孔181,也可设置有第二通孔181。
在一种可行设置方式中,在隔挡板140上间隔设置有两个第一通孔150,且设置有四个支撑块180,四个支撑块180中,两个支撑块180分别设置在两个第一通孔150处,两个支撑块180设置在未设置有第一通孔150的区域,四个支撑块180均设置有第二通孔181,与第一通孔150相对设置的支撑块180上的第二通孔181与对应的第一通孔150相对设置且连通。由于四个支撑块180均设置有第二通孔181,因此四个支撑块180可采用相同结构,便于生产制造。
由于隔离结构170上设置有支撑块180,支撑块180可提高隔离结构170的结构强度。当支撑块180设置在未设置有第一通孔150的区域时,第一部分161遮盖第一通孔150即可,当支撑块180设置在与第一通孔150相对的区域时,由于支撑块180上设置有第二通孔181,第二通孔181与第一通孔150相对,因此可通过第一部分161对于第二通孔181的遮盖,实现第一部分161对于第一通孔150的遮盖,从而减少电极组件120一侧的粉末经由第一通孔150移动到第一壁111一侧的概率。
在一些示例中,支撑块180与隔挡板140之间可通过热熔连接,隔挡板140与绝缘膜130之间可通过热熔连接。
如图18和图19所示,在一些示例中,隔挡板140上设置有两个第一通孔150,隔挡板140沿宽度方向的中心线为P1,两个第一通孔150均设置在靠近于隔挡板140的宽度方向的一个侧边的区域,也即是说,两个第一通孔150均位于P1的同一侧。支撑块180的数量为四个,两个支撑块180设置有第二通孔181,该两个支撑块180均设置在与第一通孔150相对的位置,且支撑块180上的第二通孔181与第一通孔150连通。另两个支撑块180未设置有第二通孔181,且另两个支撑块180设置在未设置有第一通孔150的区域。绝缘片160的数量为两个,其中一个绝缘片160的第一部分161粘贴在位于隔挡板140沿长度方向一侧的两个支撑块180远离隔挡板140的表面,第一部分161遮盖其中一个支撑块180上 的第二通孔181。另一个绝缘片160的第一部分161粘贴在位于隔挡板140沿长度方向另一侧的两个支撑块180远离隔挡板140的表面,第一部分161遮盖其中一个支撑块180上的第二通孔181。
图20和图21所示,在一些示例中,隔挡板140上设置有两个第一通孔150,隔挡板140沿宽度方向的中心线为P1,两个第一通孔150均设置在靠近于隔挡板140的宽度方向的一个侧边的区域,也即是说,两个第一通孔150均位于P1的同一侧。支撑块180的数量为四个,两个支撑块180设置有第二通孔181,该两个支撑块180均设置在与第一通孔150相对的位置,且支撑块180上的第二通孔181与第一通孔150连通。另两个支撑块180未设置有第二通孔181,且另两个支撑块180设置在未设置有第一通孔150的区域。绝缘片160的数量为两个,其中一个绝缘片160的第一部分161粘贴在位于隔挡板140沿长度方向一侧的设置有第二通孔181的支撑块180远离隔挡板140的表面,第一部分161遮盖第二通孔181。另一个绝缘片160的第一部分161粘贴在位于隔挡板140沿长度方向另一侧的设置有第二通孔181的支撑块180远离隔挡板140的表面,第一部分161遮盖第二通孔181。
如图22和图23所示,在一些示例中,隔挡板140上设置有两个第一通孔150,隔挡板140沿宽度方向的中心线为P1,两个第一通孔150均设置在靠近于隔挡板140的宽度方向的一个侧边的区域,也即是说,两个第一通孔150均位于P1的同一侧。支撑块180的数量为四个,两个支撑块180设置有第二通孔181,该两个支撑块180均设置在与第一通孔150相对的位置,且支撑块180上的第二通孔181与第一通孔150连通。另两个支撑块180未设置有第二通孔181,且另两个支撑块180设置在未设置有第一通孔150的区域。绝缘片160的数量为一个,该绝缘片160的第一部分161沿X方向的两侧分别粘贴在设置有第二通孔181的两个支撑块180上,且该绝缘片160的第一部分161遮盖两个第二通孔181。
如图24和图25所示,在一些示例中,隔挡板140上设置有两个第一通孔150,隔挡板140沿宽度方向的中心线为P1,两个第一通孔150的中心点均位于P1上,也即使说,两个第一通孔150在隔挡板140的宽度方向上居中设置,支撑块180的数量为四个,四个支撑块180均未设置有第二通孔181,且四个支撑块180均设置在未设置有第一通孔150的区域,也即第一通孔150不会被任何一个支撑块180遮挡。绝缘片160的数量为一个,绝缘片160的第一部分161贴在隔挡板140上,且该绝缘片160的第一部分161沿X方向的两侧分别遮盖两个第二通孔181。
如图26和图27所示,在一些示例中,隔挡板140上设置有两个第一通孔150,隔挡板140沿宽度方向的中心线为P1,两个第一通孔150的中心点均位于P1上,也即使说,两个第一通孔150在隔挡板140的宽度方向上居中设置,支撑块180的数量为四个,四个支撑块180均未设置有第二通孔181,且四个支撑块180均设置在未设置有第一通孔150的区域,也即第一通孔150不会被任何一个支撑块180遮挡。绝缘片160的数量为两个,两个绝缘片160间隔贴覆在隔挡结构上,两个绝缘片160的第一部分161分别遮盖两个第一通孔150。
如图18、图24和图26所示,在一种设置方式中,在隔挡板140上设置有第三通孔1411,第三通孔1411沿Z方向贯穿隔挡板140,第三通孔1411可以连通隔挡板140在Z方向上的相对的两个表面,从而使得隔挡板140在Z方向上的两侧的气流可以相互流动,进而增加电池单体内的气流流通路径,提升电池单体内的气流流通性能。同时,在隔挡板140上设置第三通孔1411,还可以减轻隔挡板140的重量,从而使得电池单体的重量更轻。
在一种设置方式中,隔挡板140上的第三通孔1411的数量为多个,多个第三通孔1411均设置在隔挡板140的中部区域,多个第三通孔1411可在隔挡板140上阵列分布,而在X方向上,第一通孔150设置在多个第三通孔1411形成的阵列区域的两侧。
各第三通孔1411的截面尺寸均小于第一通孔150的截面尺寸,当第一通孔150包括第一孔段151和第二孔段152时,第一孔段151和第二孔段152的截面尺寸可相等也可不相等,在第一孔段151和第二孔段152的截面尺寸不相等的情况下,第三通孔1411的截面尺寸小于第一孔段151和第二孔段152中截面尺寸更小的一者的截面尺寸。也即是说,相对于第一通孔150,第三通孔1411的尺寸相对较小。
本实施例在上述电池单体100的基础上,还提出一种电池10的示例。电池10包括如上述任一实施例提供的电池单体100。
电池10可以为电池10模块,电池单体100有多个时,多个电池单体100排列并固定形成一个电池10模块。
电池10还可以为电池10包,电池10包包括箱体200和电池单体100,电池单体100或电池10模块容纳于箱体200内。其中,箱体200用于为电池单体100或电池10模块提供容纳空间,箱体200可以独立于用电装置1的其他结构,或者箱体200可以为用电装置1中其他结构的一部分。示例性地,当用电装置1为车辆时,箱体200可以为车辆的底盘的一部分,例如,箱体200的部分可以成为车辆的地板的至少一部分,或者,箱体200的部分可以成为车辆的横梁和纵梁的至少一部分。
在电池10包中,电池单体100可以是多个,多个电池单体100之间可串联或并联或混联,混联是指多个电池单体100中既有串联又有并联。多个电池单体100之间可直接串联或并联或混联在一起,再将多个电池单体100构成的整体容纳于箱体200内;当然,电池10也可以是多个电池单体100先串联或并联或混联组成电池10模块形式,多个电池10模块再串联或并联或混联形成一个整体,并容纳于箱体200内。
电池10还可以包括其他结构,例如,该电池10还可以包括汇流部件,用于实现多个电池单体100之间的电连接。
可以理解的是,本示例中近视对包括上述电池单体100的电池10进行阐述,电池10还可以包括其他功能部件,在此不再赘述。
由于电池10包括上述实施例提供的电池单体100,因此电池10至少包括上述电池单体100的所有技术效果,在此不再赘述。
本实施例提供了一种用电装置1,其包括上述实施例中的电池10,电池10用于提供电能。
由于用电装置1包括上述电池10,因此至少具有上述电池10的全部有益效果,在此不再赘述。
用电装置1可以为但不限于手机、平板、笔记本电脑、电动玩具、电动工具、电瓶车、电动汽车、轮船、航天器等等。其中,电动玩具可以包括固定式或移动式的电动玩具,例如,游戏机、电动汽车玩具、电动轮船玩具和电动飞机玩具等等,航天器可以包括飞机、火箭、航天飞机和宇宙飞船等等。
以下实施例为了方便说明,以本申请一实施例的一种用电装置1为车辆为例进行说明。车辆可以为燃油汽车、燃气汽车或新能源汽车,新能源汽车可以是纯电动汽车、混合动力 汽车或增程式汽车等。车辆的内部设置有电池10,电池10可以设置在车辆的底部或头部或尾部。电池10可以用于车辆的供电,例如,电池10可以作为车辆的操作电源。车辆还可以包括控制器和马达,控制器用来控制电池10为马达供电,例如,用于车辆的启动、导航和行驶时的工作用电需求。
在本申请一些实施例中,电池10不仅可以作为车辆的操作电源,还可以作为车辆的驱动电源,代替或部分地代替燃油或天然气为车辆提供驱动动力。
如图3至图8所示,在本实施例的一种具体实施方式中,提供了一种电池单体100,电池单体100包括外壳110、电极组件120、隔离结构170和绝缘片160。其中,外壳110具有内腔,且外壳110具有第一壁111,第一壁111具体为外壳110的底壁,第一壁111平行于X方向和Y方向。电极组件120与隔离结构170均安装于内腔,隔离结构170的至少部分位于第一壁111与电极组件120之间,隔离结构170上设置有第一通孔150,第一通孔150设置在隔离结构170位于第一壁111与电极组件120之间的区域,第一通孔150沿Z方向贯穿隔离结构170设置。隔离结构170包括隔挡板140和绝缘膜130,绝缘膜130包覆在电极组件120的外侧,且绝缘膜130的至少部分位于电极组件120与第一壁111之间。具体地,绝缘膜130包括第一膜层131和第二膜层132,第一膜层131位于电极组件120与第一壁111之间,第二膜层132包覆在电极组件120的至少部分周向侧面,第一膜层131和第二膜层132为一体结构。具体地,绝缘膜130为一整张膜层,第二膜层132分为两部分,分别称为第一子膜层和第二子膜层,第一子膜层和第二子膜层分别位于第一膜层131的相对两侧,在X方向上,第一子膜层的两侧分别设置有第一折边132a,第二子膜层的两侧分别设置有第二折边132b,第一折边132a与第二折边132b一一对应设置,在折叠后,其中一个第一折边132a与其中一个第二折边132b存在部分重叠区域,另一个第一折边132a与另一个第二折边132b存在部分重叠区域。绝缘片160的数量与第一折边132a的数量向相同,在本实施例中,第一折边132a的数量为两个,绝缘片160的数量也为两个,每个绝缘片160均包括一个第一部分161和一个第二部分162,在Y方向上,第一部分161和第二部分162的尺寸相等。其中一个第二部分162固定其中一个第一折边132a和一个第二折边132b,另一个第二部分162固定另一个第一折边132a和另一个第二折边132b。在Y轴方向上,第二部分162与隔离结构170的两侧边缘之间的距离相等,第二部分162与第一折边132a和第二折边132b之间通过胶粘的方式连接,如此,以在第一折边132a与第二折边132b的接缝位于电极组件120的非边缘区域的情况下,第二部分162可对于第一折边132a和第二折边132b均起到较好的固定作用。隔挡件设置于绝缘膜130与第一壁111之间,具体设置于绝缘膜130的第一膜层131与第一壁111之间。第一通孔150包括第一孔段151和第二孔段152,第一孔段151与第二孔段152相对设置且相互连通,第一孔段151设置在绝缘膜130的第一膜层131上,第一孔段151贯穿绝缘膜130的第一膜层131,第二孔段152设置在隔挡板140上,第二孔段152贯穿隔挡板140。第一通孔150的数量与绝缘片160的数量相等,在本实施例中,绝缘片160的数量为两个,第一通孔150的数量也为两个。第一个绝缘片160的第一部分161遮盖一个第一通孔150,另一个绝缘片160的第一部分161遮盖另一个第一通孔150。具体地,第一部分161遮盖在对应的第一通孔150的第二孔段152远离第一孔段151的一侧,也即第一部分161粘贴于隔挡板140面向第一壁111的一侧,并遮盖对应的第一孔段151。
如图18和图19所示,在本实施例的另一种具体实施方式中,提供了一种电池单体100,电池单体100包括外壳110、电极组件120、隔离结构170和绝缘片160。其中,外壳110具有内腔,且外壳110具有第一壁111,第一壁111具体为外壳110的底壁,第一壁111平行于X方向和Y方向。电极组件120与隔离结构170均安装于内腔,隔离结构170的至少部分位于第一壁111与电极组件120之间,隔离结构170上设置有第一通孔150,第一通孔150设置在隔离结构170位于第一壁111与电极组件120之间的区域,第一通孔150沿Z方向贯穿隔离结构170设置。隔离结构170包括隔挡板140、绝缘膜130和支撑块180。绝缘膜130包覆在电极组件120的外侧,且绝缘膜130的至少部分位于电极组件120与第一壁111之间。具体地,绝缘膜130包括第一膜层131和第二膜层132,第一膜层131位于电极组件120与第一壁111之间,第二膜层132包覆在电极组件120的至少部分周向侧面,第一膜层131和第二膜层132为一体结构。具体地,绝缘膜130为一整张膜层,第二膜层132分为两部分,分别称为第一子膜层和第二子膜层,第一子膜层和第二子膜层分别位于第一膜层131的相对两侧,在X方向上,第一子膜层的两侧分别设置有第一折边132a,第二子膜层的两侧分别设置有第二折边132b,第一折边132a与第二折边132b一一对应设置,在折叠后,其中一个第一折边132a与其中一个第二折边132b存在部分重叠区域,另一个第一折边132a与另一个第二折边132b存在部分重叠区域。绝缘片160的数量与第一折边132a的数量向相同,在本实施例中,第一折边132a的数量为两个,绝缘片160的数量也为两个,每个绝缘片160均包括一个第一部分161和一个第二部分162,在Y方向上,第一部分161和第二部分162的尺寸相等。其中一个第二部分162固定其中一个第一折边132a和一个第二折边132b,另一个第二部分162固定另一个第一折边132a和另一个第二折边132b。隔挡件设置于绝缘膜130与第一壁111之间,具体设置于绝缘膜130的第一膜层131与第一壁111之间,支撑块180设置于隔挡板140面向第一壁111的一侧。支撑块180设置有第二通孔181,至少一个支撑块180的第二通孔181与第一通孔150相对设置,第一部分161遮盖在第二通孔181上。第一通孔150包括第一孔段151和第二孔段152,第一孔段151与第二孔段152相对设置且相互连通,第一孔段151设置在绝缘膜130的第一膜层131上,第一孔段151贯穿绝缘膜130的第一膜层131,第二孔段152设置在隔挡板140上,第二孔段152贯穿隔挡板140。第一孔段151和第二孔段152一一对应设置,第二通孔181与对应的第一通孔150的第二孔段152一一对应设置。具体地,隔挡板140上设置有两个第一通孔150的第二孔段152,隔挡板140沿宽度方向的中心线为P1,两个第二孔段152均设置在靠近于隔挡板140的宽度方向的一个侧边的区域,也即是说,两个第一通孔150均位于P1的同一侧。支撑块180的数量为四个,两个支撑块180设置有第二通孔181,该两个支撑块180均设置在与第一通孔150相对的位置,且支撑块180上的第二通孔181与第一通孔150连通。另两个支撑块180未设置有第二通孔181,且另两个支撑块180设置在未设置有第一通孔150的区域。绝缘片160的数量为两个,其中一个绝缘片160的第一部分161粘贴在位于隔挡板140沿长度方向一侧的两个支撑块180远离隔挡板140的表面,第一部分161遮盖其中一个支撑块180上的第二通孔181。另一个绝缘片160的第一部分161粘贴在位于隔挡板140沿长度方向另一侧的两个支撑块180远离隔挡板140的表面,第一部分161遮盖其中一个支撑块180上的第二通孔181。在本实施例中,隔挡板140沿Z轴方向贯穿设置有第三通孔1411,第三通孔1411的数量为多个,多个第三通孔1411间隔分布在 两个第一通孔150之间。
最后应说明的是:以上各实施例仅用以说明本申请的技术方案,而非对其限制;尽管参照前述各实施例对本申请进行了详细的说明,本领域的普通技术人员应当理解:其依然可以对前述各实施例所记载的技术方案进行修改,或者对其中部分或者全部技术特征进行等同替换;而这些修改或者替换,并不使相应技术方案的本质脱离本申请各实施例技术方案的范围,其均应涵盖在本申请的权利要求和说明书的范围当中。尤其是,只要不存在结构冲突,各个实施例中所提到的各项技术特征均可以任意方式组合起来。本申请并不局限于文中公开的特定实施例,而是包括落入权利要求的范围内的所有技术方案。

Claims (17)

  1. 一种电池单体,其特征在于,包括:
    外壳,所述外壳具有内腔,所述外壳具有第一壁;
    电极组件,设于所述内腔;
    隔离结构,所述隔离结构至少部分设于所述第一壁与所述电极组件之间,所述隔离结构位于所述第一壁与所述电极组件的部分设置有第一通孔;以及,
    绝缘片,所述绝缘片包括第一部分,所述第一部分遮盖所述第一通孔。
  2. 如权利要求1所述的电池单体,其特征在于,所述隔离结构设置有多个所述第一通孔,所述绝缘片遮盖所有所述第一通孔。
  3. 如权利要求2所述的电池单体,其特征在于,所述绝缘片的数量与所述第一通孔的数量相等,所述绝缘片与所述第一通孔一一对应设置,所述绝缘片遮盖对应的所述第一通孔;或者,所述绝缘片的数量为一个,一个所述绝缘片遮盖所有所述第一通孔。
  4. 如权利要求1所述的电池单体,其特征在于,所述第一部分粘贴在所述第一通孔的开口处。
  5. 如权利要求1-4任一项所述的电池单体,其特征在于,所述第一部分位于所述隔离结构面向所述第一壁的一侧。
  6. 如权利要求1-5任一项所述的电池单体,其特征在于,所述隔离结构包括隔挡板和绝缘膜,所述隔挡板位于所述电极组件与所述第一壁之间,所述绝缘膜的至少部分位于所述电极组件与所述第一壁之间,所述第一通孔包括相对设置且连通的第一孔段和第二孔段,所述第一孔段设置于所述绝缘膜,所述第二孔段设置于所述隔挡板,所述第一部分遮盖在所述第一孔段远离所述第二孔段的一侧开口或所述第二孔段远离所述第一孔段的一侧开口处。
  7. 如权利要求6所述的电池单体,其特征在于,所述绝缘膜折叠包裹于所述电极组件,并于所述电极组件的侧边形成相互交叠的第一折边和第二折边,所述绝缘片包括第二部分,所述第二部分固定所述第一折边和所述第二折边,所述第一部分与所述第二部分相连。
  8. 如权利要求7所述的电池单体,其特征在于,在第一方向上,所述第二部分与所述隔离结构的第一方向上间隔设置的两个边缘中的至少一个边缘间隔设置,所述第一方向平行于所述第一壁的宽度方向。
  9. 如权利要求8所述的电池单体,其特征在于,在所述第一方向上,所述第二部分与所述隔离结构的两侧边缘之间的距离相等。
  10. 如权利要求9所述的电池单体,其特征在于,在所述第一方向上,所述外壳的宽度为W1,所述第二部分的宽度为W2,0.1≤W2/W1≤0.9。
  11. 如权利要求10所述的电池单体,其特征在于,0.25≤W2/W1≤0.75。
  12. 如权利要求7所述的电池单体,其特征在于,沿所述电极组件的高度方向,所述第二部分的尺寸为10mm-80mm。
  13. 如权利要求12所述的电池单体,其特征在于,沿所述电极组件的高度方向,所述第二部分的尺寸为15mm-50mm。
  14. 如权利要求6所述的电池单体,其特征在于,所述隔挡板上仅设置有两个孔,所 述隔挡板上的两个孔均为所述第一孔段;所述绝缘膜上仅设置有两个孔,所述绝缘膜上的两个孔均为所述第二孔段,两个所述第一孔段与两个所述第二孔段一一相对设置。
  15. 如权利要求6-14任一项所述的电池单体,其特征在于,所述隔离结构还包括支撑块,所述隔挡板设置于所述绝缘膜与所述第一壁之间,所述支撑块设置于所述隔挡板面向所述第一壁的一侧;
    所述支撑块设置于所述隔挡板上未设置有所述第一通孔的区域;或,
    所述支撑块设置有第二通孔,至少一个所述支撑块的第二通孔与所述第一通孔相对设置,所述第一部分遮盖在所述第二通孔上。
  16. 一种电池,其特征在于,包括如权利要求1-15任一项所述的电池单体。
  17. 一种用电装置,其特征在于,所述用电装置包括如权利要求16所述的电池,所述电池用于提供电能。
PCT/CN2023/118648 2023-03-31 2023-09-13 电池单体、电池及用电装置 Ceased WO2024198251A1 (zh)

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CN118738751A (zh) 2024-10-01
JP2026502102A (ja) 2026-01-21

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