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 PDFInfo
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- 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
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- Prior art keywords
- hole
- holes
- battery cell
- isolation structure
- electrode assembly
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/14—Primary casings; Jackets or wrappings for protecting against damage caused by external factors
- H01M50/145—Primary casings; Jackets or wrappings for protecting against damage caused by external factors for protecting against corrosion
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
- H01M50/586—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries inside the batteries, e.g. incorrect connections of electrodes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/121—Organic material
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/124—Primary casings; Jackets or wrappings characterised by the material having a layered structure
- H01M50/1243—Primary casings; Jackets or wrappings characterised by the material having a layered structure characterised by the internal coating on the casing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/131—Primary casings; Jackets or wrappings characterised by physical properties, e.g. gas permeability, size or heat resistance
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/30—Arrangements for facilitating escape of gases
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/35—Gas exhaust passages comprising elongated, tortuous or labyrinth-shaped exhaust passages
- H01M50/358—External gas exhaust passages located on the battery cover or case
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/471—Spacing elements inside cells other than separators, membranes or diaphragms; Manufacturing processes thereof
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/471—Spacing elements inside cells other than separators, membranes or diaphragms; Manufacturing processes thereof
- H01M50/474—Spacing elements inside cells other than separators, membranes or diaphragms; Manufacturing processes thereof characterised by their position inside the cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/471—Spacing elements inside cells other than separators, membranes or diaphragms; Manufacturing processes thereof
- H01M50/477—Spacing elements inside cells other than separators, membranes or diaphragms; Manufacturing processes thereof characterised by their shape
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2200/00—Safety devices for primary or secondary batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy 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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- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
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Abstract
Description
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。
Claims (17)
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 如权利要求10所述的电池单体,其特征在于,0.25≤W2/W1≤0.75。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
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| EP23929825.0A EP4618207A4 (en) | 2023-03-31 | 2023-09-13 | BATTERY COMPONENT, BATTERY AND ELECTRICAL DEVICE |
| KR1020257026086A KR20250130831A (ko) | 2023-03-31 | 2023-09-13 | 배터리 셀, 배터리 및 전기 장치 |
| JP2025534477A JP2026502102A (ja) | 2023-03-31 | 2023-09-13 | 電池セル、電池及び電気装置 |
| CN202380054716.7A CN119547236A (zh) | 2023-03-31 | 2023-09-13 | 电池单体、电池及用电装置 |
| US19/277,420 US20250349947A1 (en) | 2023-03-31 | 2025-07-23 | Battery cell, battery and electric device |
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| CN202310341097.1A CN118738751A (zh) | 2023-03-31 | 2023-03-31 | 电池单体、电池及用电装置 |
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| PCT/CN2023/118648 Ceased WO2024198251A1 (zh) | 2023-03-31 | 2023-09-13 | 电池单体、电池及用电装置 |
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| JP (1) | JP2026502102A (zh) |
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| CN222355394U (zh) * | 2023-12-05 | 2025-01-14 | 湖北亿纬动力有限公司 | 绝缘组件及动力电池 |
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| CN102067355A (zh) * | 2008-06-13 | 2011-05-18 | 丰田自动车株式会社 | 电池 |
| JP2020017376A (ja) * | 2018-07-24 | 2020-01-30 | 株式会社豊田自動織機 | 蓄電装置及び蓄電装置の製造方法 |
| CN212967787U (zh) * | 2020-10-13 | 2021-04-13 | 厦门海辰新能源科技有限公司 | 一种动力电池底托板及其动力电池 |
| CN215816261U (zh) * | 2021-09-30 | 2022-02-11 | 厦门海辰新能源科技有限公司 | 电池和用电设备 |
| CN218385339U (zh) * | 2022-07-21 | 2023-01-24 | 宁德时代新能源科技股份有限公司 | 电池单体、电池及用电设备 |
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| JP6507612B2 (ja) * | 2014-12-11 | 2019-05-08 | 株式会社Gsユアサ | 蓄電素子 |
| CN107394063B (zh) * | 2016-05-16 | 2023-06-06 | 宁德时代新能源科技股份有限公司 | 二次电池 |
| KR102857146B1 (ko) * | 2021-07-29 | 2025-09-10 | 컨템포러리 엠퍼렉스 테크놀로지 (홍콩) 리미티드 | 배터리 셀 및 그 제조방법과 제조 시스템, 배터리 및 전기장치 |
| HUE071288T2 (hu) * | 2021-07-29 | 2025-08-28 | Contemporary Amperex Technology Hong Kong Ltd | Akkumulátorcella, gyártási eljárás és ehhez való gyártási rendszer, akkumulátor és elektromos berendezés |
| CN218300181U (zh) * | 2022-06-24 | 2023-01-13 | 华为数字能源技术有限公司 | 电化学装置及电子设备 |
| CN220122029U (zh) * | 2023-03-31 | 2023-12-01 | 宁德时代新能源科技股份有限公司 | 电池单体、电池及用电装置 |
| CN219476941U (zh) * | 2023-05-04 | 2023-08-04 | 宁德时代新能源科技股份有限公司 | 电池单体、电池及用电装置 |
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2023
- 2023-03-31 CN CN202310341097.1A patent/CN118738751A/zh active Pending
- 2023-06-19 WO PCT/CN2023/101153 patent/WO2024198114A1/zh not_active Ceased
- 2023-09-13 EP EP23929825.0A patent/EP4618207A4/en active Pending
- 2023-09-13 JP JP2025534477A patent/JP2026502102A/ja active Pending
- 2023-09-13 CN CN202380054716.7A patent/CN119547236A/zh active Pending
- 2023-09-13 WO PCT/CN2023/118648 patent/WO2024198251A1/zh not_active Ceased
- 2023-09-13 KR KR1020257026086A patent/KR20250130831A/ko active Pending
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| CN102067355A (zh) * | 2008-06-13 | 2011-05-18 | 丰田自动车株式会社 | 电池 |
| JP2020017376A (ja) * | 2018-07-24 | 2020-01-30 | 株式会社豊田自動織機 | 蓄電装置及び蓄電装置の製造方法 |
| CN212967787U (zh) * | 2020-10-13 | 2021-04-13 | 厦门海辰新能源科技有限公司 | 一种动力电池底托板及其动力电池 |
| CN215816261U (zh) * | 2021-09-30 | 2022-02-11 | 厦门海辰新能源科技有限公司 | 电池和用电设备 |
| CN218385339U (zh) * | 2022-07-21 | 2023-01-24 | 宁德时代新能源科技股份有限公司 | 电池单体、电池及用电设备 |
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Also Published As
| Publication number | Publication date |
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| CN119547236A (zh) | 2025-02-28 |
| EP4618207A1 (en) | 2025-09-17 |
| US20250349947A1 (en) | 2025-11-13 |
| KR20250130831A (ko) | 2025-09-02 |
| EP4618207A4 (en) | 2026-04-01 |
| WO2024198114A1 (zh) | 2024-10-03 |
| CN118738751A (zh) | 2024-10-01 |
| JP2026502102A (ja) | 2026-01-21 |
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