WO2022205193A1 - 电池 - Google Patents

电池 Download PDF

Info

Publication number
WO2022205193A1
WO2022205193A1 PCT/CN2021/084702 CN2021084702W WO2022205193A1 WO 2022205193 A1 WO2022205193 A1 WO 2022205193A1 CN 2021084702 W CN2021084702 W CN 2021084702W WO 2022205193 A1 WO2022205193 A1 WO 2022205193A1
Authority
WO
WIPO (PCT)
Prior art keywords
region
layer
metal plate
battery
length
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2021/084702
Other languages
English (en)
French (fr)
Inventor
董宇洋
闫东阳
曾巧
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ningde Amperex Technology Ltd
Original Assignee
Ningde Amperex Technology Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ningde Amperex Technology Ltd filed Critical Ningde Amperex Technology Ltd
Priority to EP21870551.5A priority Critical patent/EP4095993A4/en
Priority to PCT/CN2021/084702 priority patent/WO2022205193A1/zh
Priority to JP2022520104A priority patent/JP2023523113A/ja
Priority to US17/709,907 priority patent/US20220320638A1/en
Publication of WO2022205193A1 publication Critical patent/WO2022205193A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • 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
    • H01M50/172—Arrangements of electric connectors penetrating the casing
    • H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
    • H01M50/178—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for pouch or flexible bag cells
    • 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
    • H01M50/543—Terminals
    • H01M50/547—Terminals characterised by the disposition of the terminals on the cells
    • H01M50/55—Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
    • 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
    • H01M50/543—Terminals
    • H01M50/552—Terminals characterised by their shape
    • H01M50/553—Terminals adapted for prismatic, pouch or rectangular cells
    • 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
    • H01M50/117—Inorganic material
    • H01M50/119—Metals
    • 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
    • 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
    • H01M50/126—Primary casings; Jackets or wrappings characterised by the material having a layered structure comprising three or more layers
    • H01M50/129—Primary casings; Jackets or wrappings characterised by the material having a layered structure comprising three or more layers with two or more layers of only organic material
    • 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
    • H01M50/183—Sealing members
    • H01M50/184—Sealing members characterised by their shape or structure
    • 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 energy storage devices, and in particular, to a battery.
  • Electrochemical energy storage occupies more and more positions in the future energy storage field due to its high energy density, long life, and fast response speed. to a larger proportion.
  • the tabs protruding from the head of the cell protrude from the packaging bag, and this structure will cause the problem of reduced air tightness of the packaging bag.
  • An object of the present application is to provide a battery capable of suppressing the occurrence of a phenomenon in which the airtightness of the case is lowered due to the arrangement of the first metal plate and the second metal plate.
  • a battery including a first electrode, a second electrode, a first layer, and a case.
  • the first electrode includes a first conductor having a first surface and a second surface, and a first metal plate connected to the first surface of the first conductor.
  • the second electrode includes a second electrical conductor having a third side and a fourth side, and a second metal plate connected to the third side of the second electrical conductor.
  • the first layer includes insulating material and is connected to the first surface of the first metal plate and the third surface of the second metal plate.
  • the casing includes a first part and a second part, and covers the first electrode, the second electrode and at least a part of the first layer through the first part and the second part, and at least a part of the first part is connected with the first layer.
  • the sealing of the first electrode and the second electrode in the casing can be realized, and the arrangement of the first metal plate and the second metal plate can be suppressed.
  • the phenomenon that the airtightness of the casing is reduced due to the plate occurs; and by providing the first layer covering the first metal plate and the second metal plate, the relative positions of the first metal plate and the second metal plate are fixed, and when an external force is applied, the relative positions of the first and second metal plates are fixed.
  • the first metal plate and the second metal plate are not easy to incline, and it is possible to avoid the situation that the sealing performance is affected by the inclination.
  • the first layer having the monolithic form prevents the first and second parts of the housing between the first and second metal plates from coming into direct contact, so that the height difference is small everywhere in the sealing area, Further improve sealing.
  • the first layer includes a first region connected to the first portion and a second region connected to the second region and away from the housing.
  • the first layer is partially exposed to the outside of the casing, which can avoid the risk of the casing edge being compressed during packaging, which is conducive to sealing.
  • the first layer further includes a third region connected to the second region and covered by the housing.
  • the length of the first region is smaller than the length of the second region.
  • the length of the first region is greater than the length of the second region. The shorter the length of the second region, the less influence it has on subsequent packaging.
  • the length of the third region is smaller than the length of the second region. The shorter the length of the third region, the less the inner space of the housing is occupied by the electrode assembly, and the energy density can be improved.
  • the length of the third region is greater than the length of the second region.
  • the first layer includes a first area connected to the first portion and a third area connected to the first area and covered by the housing.
  • the length of the first layer is less than the length of the housing.
  • the first layer is formed by stacking one or more layers of material in a third direction perpendicular to the first surface of the first metal plate.
  • the first layer is disposed away from the first electrical conductor.
  • the battery further includes a second layer including an insulating material, and the second layer is connected to both the second surface of the first metal plate and the fourth surface of the second metal plate.
  • the first layer and the second layer are connected.
  • the first layer includes a fourth region located between the first metal plate and the second metal plate, the fourth region when viewed in a third direction perpendicular to the first surface of the first metal plate The area is connected to the second layer.
  • the first layer further includes a fifth region located on one side of the first metal plate and facing away from the fourth region, and a sixth region located on one side of the second metal plate and facing away from the fourth region, in At least one of the fifth region and the sixth region is connected to the second layer when viewed in a third direction perpendicular to the first surface of the first metal plate.
  • the first layer when viewed in a third direction perpendicular to the first surface of the first metal plate, the first layer is connected to the second layer at least in the first region.
  • the first layer when viewed in a third direction perpendicular to the first surface of the first metal plate, the first layer is connected to the second layer at least in the second region.
  • the first layer includes a first region connected to the first portion and a third region covered by the housing and away from the first region.
  • the first layer when viewed along a third direction perpendicular to the first surface of the first metal plate, the first layer is connected to the second layer at least in the third region.
  • the first layer includes at least one of polyethylene, polypropylene, phenolic resin, melamine resin, unsaturated polyester resin, epoxy resin, silicone resin, and polyurethane.
  • the second layer includes at least one of polyethylene, polypropylene, phenolic resin, melamine resin, unsaturated polyester resin, epoxy resin, silicone resin, and polyurethane.
  • the first layer may pass visible light.
  • the second layer may pass visible light.
  • FIG. 1 is a side view of a battery provided by an embodiment of the present application.
  • FIG. 2 is a schematic front view of the battery shown in FIG. 1;
  • FIG. 3 is a schematic view of the back of the battery shown in FIG. 1;
  • FIG. 4 is a schematic diagram of a partial structure of the battery shown in FIG. 1;
  • FIG. 5 is a cross-sectional view of the battery shown in FIG. 4 along V-V;
  • FIG. 6 is a cross-sectional view of a battery according to another embodiment of the application.
  • FIG. 7 is a cross-sectional view of the battery shown in FIG. 4 along VII-VII;
  • FIG. 8 is a cross-sectional view of the battery shown in FIG. 4 along VIII-VIII;
  • FIG. 9 is a schematic structural diagram of a first layer according to an embodiment of the application.
  • FIG. 10 is a schematic diagram of a partial structure of a battery according to another embodiment of the present application.
  • FIG. 11 is a cross-sectional view of the battery shown in FIG. 10 along XI-XI;
  • FIG. 12 is a schematic diagram of a partial structure of a battery according to another embodiment of the present application.
  • FIG. 13 is a cross-sectional view of the battery shown in FIG. 12 along XIII-XIII;
  • FIG. 14 is a schematic structural diagram of the battery of Comparative Example 1 of the present application.
  • the third side 221a is the third side 221a
  • the first conductor 211 The first conductor 211
  • the third area 33 is the third area 33
  • the third floor 210 The third floor 210
  • spatially relative terms such as “on” and the like, may be used herein for convenience of description to describe the relationship of one element or feature to another element(s) or feature(s) as illustrated in the figures. It will be understood that, in addition to the orientation depicted in the figures, spatially relative terms are intended to encompass different orientations of the device or apparatus in use or operation. For example, if the device in the figures is turned over, elements described as “above” or “over” other elements or features would then be oriented “below” or “beneath” the other elements or features. Thus, the exemplary term “upper” can include both an orientation of above and below. It will be understood that, although the terms first, second, third, etc.
  • the X-direction refers to the direction extending from the first region of the first layer to the second region
  • the Y-direction refers to the direction extending from the first metal plate to the second metal plate
  • the Z-direction refers to the direction from the first metal plate to the second metal plate.
  • the three directions of X, Y, and Z are perpendicular to each other.
  • an embodiment of the present application provides a battery 100 , including a casing 10 , an electrode assembly 20 , an electrolyte (not shown), a first layer 30 and a second layer 40 .
  • the housing 10 includes a first part 11 and a second part 12 which are oppositely arranged.
  • the shapes of the first part 11 and the second part 12 are matched.
  • the first portion 11 includes a first region 11a and a second region 11b which are connected to each other.
  • the first area 11a is connected with the second part 12, and the three sides of the second area 11b are surrounded by the first area 11a.
  • the second region 11b covers the electrode assembly 20 when viewed from the Z direction.
  • the second portion 12 includes a third area 12a and a fourth area 12b that are connected to each other.
  • the third area 12a is connected with the first part 11, and the third area 12a is surrounded by three sides of the fourth area 12b.
  • the fourth region 12b covers the electrode assembly 20 when viewed from the Z direction.
  • the second area 11b of the first part 11 and the fourth area 12b of the second part 12 together form a receiving cavity 14 for receiving the electrolyte, part of the electrode assembly 20 and at least a part of the first layer 30 and the second layer 40 .
  • the casing 10 may be a packaging bag packaged with a packaging film, that is, the battery 100 is a soft-pack battery.
  • the encapsulation film used to form the case 10 includes a protective layer, a metal layer and an encapsulation layer stacked in sequence, the encapsulation layer is close to the electrode assembly 20 , and the protective layer is far away from the electrode assembly 20 .
  • the material of the protective layer is polymer resin, which is used to protect the metal layer and prevent the metal layer from being damaged due to external force, and at the same time, it can prevent air infiltration in the external environment, and maintain the interior of the battery 100 in a water-free and oxygen-free environment.
  • the material of the metal layer is metal, such as aluminum, steel, etc., for preventing the penetration of moisture in the external environment and preventing the battery 100 from being damaged by external force.
  • the material of the encapsulation layer is a polymer, such as polypropylene, polyamide, etc., which is used to encapsulate the encapsulation film to prevent the encapsulation film from being dissolved or swelled by the organic solvent in the electrolyte.
  • the encapsulation layer is also used to prevent the electrolyte in the electrolyte. Contact with the metal layer causes the metal layer to corrode.
  • the encapsulating film can be folded in half, and then a certain temperature and pressure can be applied to the surface of the encapsulating film folded in half using a heat-sealing head for heat sealing, so that the encapsulating layers of the encapsulating film are melted and connected.
  • the innermost layer of the case 10 is an encapsulation layer.
  • the battery 100 is not limited to a soft-pack battery, but can also be a steel case battery or an aluminum case battery, etc., which is not limited in this application.
  • the electrode assembly 20 includes a first metal plate 214 and a second metal plate 224 . Both the first metal plate 214 and the second metal plate 224 protrude from one end of the housing 10 to connect external elements.
  • the first metal plate 214 includes a first surface 214 a facing the first portion 11 and a second surface 214 b facing the second portion 12 .
  • the second metal plate 224 includes a third surface 224 a facing the first part 11 and a fourth surface 224 b facing the second part 12 .
  • the first layer 30 is in the form of a sheet, which covers at least a portion of the first surface 214a of the first metal plate 214 and at least a portion of the third surface 224a of the second metal plate 224, and is connected to the first surface 214a, the third surface 224a and the third surface 224a of the second metal plate 224. At least a part of the first part 11 is all connected.
  • the material of the first layer 30 includes an insulating material selected from at least one of polyethylene, polypropylene, phenolic resin, melamine resin, unsaturated polyester resin, epoxy resin, silicone resin and polyurethane.
  • the adhesion between the first layer 30 and the metal plate is higher than that between the shell 10 and the metal plate. Since the metal plate only undergoes a short heating and pressing process during the packaging process, if the shell 10 and the metal plate are not connected
  • the first layer 30 is arranged between the plates, and there may be a gap between the metal plate and the casing 10, or there is a greater possibility of separation in the subsequent life cycle, which seriously affects the sealing performance.
  • the materials of the first layer 30 and the encapsulation layer of the casing 10 can both be polymers, with relatively close melting points, better bonding degree under high temperature and pressure environment, and improved sealing performance.
  • the second layer 40 is in the form of a sheet, which covers at least a portion of the second surface 214b of the first metal plate 214 and at least a portion of the fourth surface 224b of the second metal plate 224, and is in contact with the second surface 214b, the fourth surface 224b and At least a portion of the second portion 12 is all connected.
  • the material of the second layer 40 includes an insulating material selected from at least one of polyethylene, polypropylene, phenolic resin, melamine resin, unsaturated polyester resin, epoxy resin, silicone resin and polyurethane.
  • the first layer 30 can pass visible light and the second layer 40 can pass visible light.
  • the electrode assembly 20 includes a first electrode 21 , a second electrode 22 and a separator 23 , and the separator 23 is disposed between the first electrode 21 and the second electrode 22 .
  • the isolation film 23 serves to prevent the first electrode 21 and the second electrode 22 from directly contacting, thereby preventing the electrode assembly 20 from being short-circuited.
  • the electrolyte is used to wet the first electrode 21 , the second electrode 22 and the separator 23 .
  • the electrode assembly 20 is a wound structure, that is, the first electrode 21 , the separator 23 and the second electrode 22 are stacked and wound in sequence to form the electrode assembly 20 .
  • the electrode assembly 20 may also be a laminated structure, that is, the first electrode 21 , the isolation film 23 and the second electrode 22 are stacked in sequence to form the electrode assembly 20 , which is not limited in this application.
  • the first electrode 21 includes a first conductor 211 , a first conductive material layer 212 , a first tab 213 and a first metal plate 214 .
  • the first conductor 211 includes a first surface 211a and a second surface 211b disposed opposite to each other. Both the first side 211 a and the second side 211 b include a region where the first conductive material layer 212 is provided and a region away from the first conductive material layer 212 .
  • the material of the first conductive material layer 212 may be an active material, for example, one or more of electrochemically active materials selected from LiCoO 2 , LiFeP0 4 and the like that can deintercalate lithium ions.
  • the first tab 213 is welded to the first surface 211 a of the first conductor 211 and connected to the first surface 214 a of the first metal plate 214 .
  • the first tab 213 may be formed by extending outward from one end of the first surface 211 a located in the region away from the first conductive material layer 212 and connected to the first surface 214 a of the first metal plate 214 .
  • Application is not limited.
  • One end of the first metal plate 214 is connected to the first tab 213 , and the other end of the first metal plate 214 extends out of the casing 10 from one end of the casing 10 .
  • the first metal plate 214 is connected to the first electrode 21 in the casing 10 , and when viewed from the Z direction, the first metal plate 214 extends to the outside of the casing 10 through the first area 11 a in the second area 11 b .
  • the battery provided by another embodiment of the present application is different from the battery shown in FIG. 5 in that the first electrode body 21 includes a plurality of first tabs 213 , and each first tab 213 is separated from the One end of the first surface 211 a of the region of the first conductive material layer 212 is formed to extend outward, and is connected to the first surface 214 a of the first metal plate 214 through the adapter plate 24 .
  • the second electrode 22 includes a second conductor 221 , a second conductive material layer 222 , a second tab 223 and a second metal plate 224 .
  • the second conductor 221 includes a third surface 221a and a fourth surface 221b which are oppositely disposed. Both the third side 221 a and the fourth side 221 b include a region where the second conductive material layer 222 is provided and a region away from the second conductive material layer 222 .
  • the material of the second conductive material layer 222 may be an active material, for example, one or more electrochemically active materials selected from graphite, soft carbon, hard carbon, Li 4 Ti 5 0 12 and the like that can intercalate lithium ions.
  • the second tab 223 is formed by extending outward from one end located away from the third surface 221 a of the second conductive material layer 222 , and is connected to the third surface 224 a of the second metal plate 224 .
  • the second tab 223 can be welded on the third surface 221a of the second conductor 221, which is not limited in the present application.
  • One end of the second metal plate 224 is connected to the second tab 223 , and the other end of the second metal plate 224 protrudes out of the casing 10 from one end of the casing 10 .
  • the second metal plate 224 is connected to the second electrode 22 in the case 10 , and when viewed from the Z direction, the second metal plate 224 extends to the outside of the case 10 through the first region 11 a in the second region 11 b .
  • the case 10 covers a part of the first electrode 21 , a part of the second electrode 22 , at least a part of the first layer 30 and at least a part of the second layer 40 through the first part 11 and the second part 12 .
  • the first layer 30 includes a first region 31 connected to the first portion 11 located in the first region 11 a , a second region 31 connected to the first region 31 and located outside the housing 10 The area 32 and the third area 33 connected to the first area 31 and located in the receiving cavity 14 .
  • the first region 31 is an orthographic projection of the first layer 30 along the Z direction that coincides with the first region 11a of the first part 11, and is sandwiched between the first region 11a and the second region 11a of the first part 11 in the Z direction
  • the area between the third areas 12a of the part 12; the second area 32 is connected to the first area 31 in the first layer 30 and is farther away from the shell than the end point 11aa of the first part 11 in the X direction when viewed from the Z direction
  • the third region 33 is the region of the first layer 30 that is connected to the first region 31 and is closer to the interior of the housing 10 than the end point 11aa of the first portion 11 in the X direction when viewed from the Z direction.
  • the length of the first region 31 is greater than the length of the second region 32
  • the length of the third region 33 is greater than the length of the first region 31 .
  • the length of the first layer 30 is less than the length of the casing 10 .
  • the length of the first layer 30 is less than the length of the second region 11b.
  • the first layer 30 and the second layer 40 both cover the first metal plate 214 and the second metal plate 224, and both extend along the Y direction and the direction opposite to the Y direction for a certain amount distance.
  • the first layer 30 also includes a fourth region 34 located between the first metal plate 214 and the second metal plate 224, a fifth region 35 located on one side of the first metal plate 214 and facing away from the fourth region 34, and a second region 35 located on the side of the first metal plate 214 One side of the metal plate 224 and the sixth region 36 facing away from the fourth region 34 .
  • the first layer 30 and the first metal plate 214 have a first overlapping portion 30a that overlaps
  • the first layer 30 and the second metal plate 224 have a second overlapping portion 30b that overlaps.
  • the first overlapping portion 30a includes part of the first area 31, part of the second area 32 and part of the third area 33 covering the first surface 214a
  • the second overlapping part 30b includes part of the first area 31, part of the third area 31 covering the third surface 224a.
  • the second area 32 and part of the third area 33 The fourth area 34 connects the first overlapping portion 30a and the second overlapping portion 30b.
  • the fifth region 35 is connected to the side of the first overlapping portion 30 a facing away from the fourth region 34 .
  • the sixth region 36 is connected to the side of the second overlapping portion 30b facing away from the fourth region 34 .
  • the fourth area 34 and the first area 31, the second area 32 and the third area 33 respectively have overlapping first overlapping areas 34a, second overlapping areas 34b and third overlapping areas 34c.
  • the fifth area 35 has a fourth overlapping area 35a, a fifth overlapping area 35b and a sixth overlapping area 35c with the first area 31, the second area 32 and the third area 33, respectively, and the sixth area 36 and the first area 31 , the second area 32 and the third area 33 respectively have overlapping seventh overlapping area 36a, eighth overlapping area 36b and ninth overlapping area 36c.
  • the first layer 30 and the second layer 40 have connected portions.
  • the fourth region 34 is connected to the second layer 40 and at least one of the fifth region 35 and the sixth region 36 is connected to the second layer 40 when viewed in the Z direction. In some embodiments, both the fifth region 35 and the sixth region 36 are connected to the second layer 40 .
  • the fourth area 34 is connected to the second layer 40 at at least one of the first overlapping area 34a, the second overlapping area 34b and the third overlapping area 34c
  • the fifth area 35 is connected to the second layer 40 at the fourth overlapping area 35a, the fifth overlapping area 34c
  • the second layer 40 is connected to the second layer 40 at at least one of the overlapping area 35b and the sixth overlapping area 35c
  • the sixth area 36 is connected to at least one of the seventh overlapping area 36a, the eighth overlapping area 36b and the ninth overlapping area 36c.
  • the second layer 40 is connected.
  • the fourth region 34 covers one sidewall of the first metal plate 214 connecting the first surface 214a and the second surface 214b and one sidewall of the second metal plate 224 connecting the third surface 224a and the fourth surface 224b
  • the fifth region 35 covers the other side wall of the first metal plate 214
  • the sixth region 36 covers the other side wall of the second metal plate 224, that is, the first layer 30 and the two sides of the first metal plate 214 and the second metal plate 224
  • the walls are in close contact with each other, whereby the occurrence of a phenomenon in which the airtightness of the casing 10 is lowered due to the arrangement of the first metal 214 and the second metal plate 224 here can be suppressed.
  • the second layer 40 is in intimate contact with both sidewalls of the first metal plate 214 and the second metal plate 224 .
  • the first layer 30 is connected to the second layer 40 in the first region 31 when viewed along the Z direction. In other embodiments, the first layer 30 is connected to the second layer 40 at the second region 32 when viewed in the Z direction.
  • the first layer 30 is formed by stacking one or more layers of materials along the Z direction.
  • the first layer 30 is formed from a stack of two layers of materials, including a substrate 301 and an adhesive layer 303 .
  • the material of the base material 301 may be at least one of polyethylene terephthalate, polyimide, and polyamideimide.
  • the material of the adhesive layer 303 may be at least one of polyethylene, polypropylene, phenolic resin, melamine resin, unsaturated polyester resin, epoxy resin, silicone resin and polyurethane.
  • the adhesive layer 303 is adhered to the first metal plate and the second metal plate, and the base material 301 and the encapsulation layer of the housing 10 have a welded part.
  • the length of the first region 31 is smaller than the length of the second region 32 .
  • the length of the first region 31 is greater than the length of the third region 33 .
  • the present application realizes the sealing of the first electrode 21 and the second electrode 22 in the casing 10 by arranging the first layer 30/the second layer 40 between the first metal plate 214/the second metal plate 224 and the casing 10; And by arranging the first layer 30 and the second layer 40 that both cover the first metal plate 214 and the second metal plate 224, the relative positions of the first metal plate 214 and the second metal plate 224 are fixed, so that when an external force is applied The first metal plate 214 and the second metal plate 224 are not easy to incline, which can avoid the situation that the sealing performance is affected by the inclination.
  • first layer 30 and the second layer 40 having the monolithic form prevent the first part 11 and the second part 12 of the case 10 between the first metal plate 214 and the second metal plate 224 from being in direct contact, so that the The height difference between places in the sealing area is small, which further improves the sealing performance.
  • Both the first layer and the second layer are connected with the first metal plate and the second metal plate for gluing, and then the first metal plate and the second metal plate are respectively welded with the first tab and the second tab, wherein The order of the gluing process and the welding process can be interchanged.
  • the first electrode, the second electrode and the separator are wound together to obtain an electrode assembly.
  • liquid injection, chemical formation, and packaging are performed to make the battery as shown in FIG. 2 .
  • the difference from Embodiment 1 is that, referring to FIG. 13 , the two third layers 210 are respectively connected to the first metal plate 214 and the second metal plate 224 for adhesive bonding.
  • the third layer 210 includes an insulating material.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

本申请公开了一种电池，包括第一电极、第二电极、第一层和壳体。第一电极包括具有第一面和第二面的第一导电体以及与第一导电体的第一面相连接的第一金属板。第二电极包括具有第三面和第四面的第二导电体以及与第二导电体的第三面相连接的第二金属板。第一层包括绝缘材料并与第一金属板的第一表面和第二金属板的第三表面相连接。壳体包括第一部分和第二部分，并通过第一部分和第二部分覆盖第一电极、第二电极以及第一层的至少一部分，第一部分的至少一部分与第一层相连接。

Description

电池 技术领域
本申请涉及储能装置领域，尤其是涉及一种电池。
背景技术
当前能源存储手段主要存在电化学储能、机械储能与电磁储能三种方向，而电化学储能因为其高能量密度、长寿命、响应速度快等特征，在未来储能领域占据着越来越大的比例。软包装电池中，由电芯头部伸出的极耳从包装袋伸出，此结构会造成包装袋气密性下降的问题。
发明内容
本申请的一个目的在于提出一种电池，其可抑制因配置第一金属板和第二金属板导致壳体气密性下降的现象发生。
本申请一些实施例提供一种电池，该电池包括第一电极、第二电极、第一层和壳体。第一电极包括具有第一面和第二面的第一导电体以及与第一导电体的第一面相连接的第一金属板。第二电极包括具有第三面和第四面的第二导电体以及与第二导电体的第三面相连接的第二金属板。第一层包括绝缘材料并与第一金属板的第一表面和第二金属板的第三表面相连接。壳体包括第一部分和第二部分，并通过第一部分和第二部分覆盖第一电极、第二电极以及第一层的至少一部分，第一部分的至少一部分与第一层相连接。
本申请通过设置位于第一金属板/第二金属板和壳体之间的第一层，实现壳体内第一电极和第二电极的密封，且可抑制因配置第一金属板和第二金属板导致壳体气密性下降的现象发生；且通过设置覆盖第一金属板和第二金属板的第一层，使第一金属板和第二金属板的相对位置被固定，在受到外力时第一金属板和第二金属板不易倾斜，可避免因倾斜而影响密封性的情况。另外，具有整片形态的第一层使位于第一金属板和第二金属板之间的壳体的第一部分和第二部分不会直接接触，从而封印区中各处的高度差较小，进一步提高密封性。
根据本申请的一些实施例，第一层包括与第一部分相连接的第一区域以及与第二区域相连接且离开壳体的第二区域。通过设置离开壳体的第二区域，使第一层部分外露于壳体外，可避免壳体边缘在封装时压空的风险，利于密封。
根据本申请的一些实施例，第一层还包括与第二区域相连接且被壳体覆盖的第三区域。通过设置第三区域，使第一层从封印区向内延伸，可避免因第一层未从封印区向壳体内部延伸而导致的有效封印宽度变窄的风险。
根据本申请的一些实施例，在第一层中，沿自第一区域向第二区域延伸的第一方向，第一区域的长度小于第二区域的长度。
根据本申请的一些实施例，在第一层中，沿自第一区域向第二区域延伸的第一方向，第一区域的长度大于第二区域的长度。第二区域的长度越短，其对后续的封装影响越少。
根据本申请的一些实施例，在第一层中，沿自第一区域向第二区域延伸的第一方向，第三区域的长度小于第二区域的长度。第三区域的长度越短，使得电极组件占用壳体的内部空间越少，可提高能量密度。
根据本申请的一些实施例，在第一层中，沿自第一区域向第二区域延伸的第一方向，第三区域的长度大于第二区域的长度。
根据本申请的一些实施例，第一层包括与第一部分相连接的第一区域以及与第一区域相连接且被壳体覆盖的第三区域。
根据本申请的一些实施例，沿第一金属板向第二金属板延伸的第二方向，第一层的长度小于壳体的长度。
根据本申请的一些实施例，第一层由一层或多层材料沿与第一金属 板的第一表面垂直的第三方向堆叠形成。
根据本申请的一些实施例，第一层离开第一导电体设置。
根据本申请的一些实施例，电池还包括含有绝缘材料的第二层，第二层与第一金属板的第二表面和第二金属板的第四表面均相连接。
根据本申请的一些实施例，第一层和第二层相连接。
根据本申请的一些实施例，第一层包括位于第一金属板和第二金属板之间的第四区域，在沿与第一金属板的第一表面垂直的第三方向观察时，第四区域与第二层相连接。
根据本申请的一些实施例，第一层还包括位于第一金属板的一侧且背离第四区域的第五区域以及位于第二金属板的一侧且背离第四区域的第六区域，在沿与第一金属板的第一表面垂直的第三方向观察时，第五区域和第六区域中至少一者与第二层相连接。
根据本申请的一些实施例，在沿与第一金属板的第一表面垂直的第三方向观察时，第一层至少在第一区域与第二层相连接。
根据本申请的一些实施例，在沿与第一金属板的第一表面垂直的第三方向观察时，第一层至少在第二区域与第二层相连接。
根据本申请的一些实施例，第一层包括与第一部分相连接的第一区域以及被壳体覆盖且离开第一区域的第三区域。
根据本申请的一些实施例，在沿与第一金属板的第一表面垂直的第三方向观察时，第一层至少在第三区域与第二层相连接。
根据本申请的一些实施例，第一层包括聚乙烯、聚丙烯、酚醛树脂、三聚氰胺树脂、不饱和聚酯树脂、环氧树脂、有机硅树脂和聚氨酯中至少一种。
根据本申请的一些实施例，第二层包括聚乙烯、聚丙烯、酚醛树脂、三聚氰胺树脂、不饱和聚酯树脂、环氧树脂、有机硅树脂和聚氨酯中至少一种。
根据本申请的一些实施例，第一层可通过可视光。
根据本申请的一些实施例，第二层可通过可视光。
附图说明
本申请的上述和/或附加的方面和优点从结合下面附图对实施例的描述中将变得明显和容易理解，其中：
图1为本申请一实施例提供的电池的侧视图；
图2为图1所示的电池的正面示意图；
图3为图1所示的电池的背面示意图；
图4为图1所示的电池的局部结构示意图；
图5为图4所示的电池沿V-V的剖视图；
图6为本申请另一实施例的电池的剖视图；
图7为图4所示的电池沿VII-VII的剖视图；
图8为图4所示的电池沿VIII-VIII的剖视图；
图9为本申请一实施例的第一层的结构示意图；
图10为本申请另一实施例的电池的局部结构示意图；
图11为图10所示的电池沿XI-XI的剖视图；
图12为本申请另一实施例的电池的局部结构示意图；
图13为图12所示的电池沿XIII-XIII的剖视图；
图14为本申请对比例1的电池的结构示意图。
主要元件符号说明
电池                                      100
壳体                                      10
电极组件                                  20
第一层                                    30
第二层                                    40
第一部分                                  11
第二部分                              12
收容腔                                14
第一金属板                            214
第二金属板                            224
第一表面                              214a
第二表面                              214b
第三表面                              224a
第四表面                              224b
第一电极                              21
第一面                                211a
第二面                                211b
第三面                                221a
第四面                                221b
第二电极                              22
隔离膜                                23
第一导电体                            211
第一导电材料层                        212
第一极耳                              213
转接板                                24
第二导电体                            221
第二极耳                              223
第二导电材料层                        222
第一区域                              31
第二区域                              32
第一区                                11a
第二区                                11b
第三区                                12a
第四区                                12b
第三区域                              33
第四区域                              34
第五区域                              35
第六区域                              36
基材                                  301
胶粘剂层                              303
第三层                                210
端点                                  11aa
第一重叠部分                          30a
第二重叠部分                          30b
第一重叠区域                          34a
第二重叠区域                          34b
第三重叠区域                          34c
第四重叠区域                          35a
第五重叠区域                          35b
第六重叠区域                          35c
第七重叠区域                          36a
第八重叠区域                          36b
第九重叠区域                          36c
具体实施方式
下面对本申请实施例中的技术方案进行清楚、详细地描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。除非另有定义，本文所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同。在本申请的说明书中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本申请。
下文，将详细地描述本申请的实施方式。但是，本申请可体现为许多不同的形式，并且不应解释为限于本文阐释的示例性实施方式。而是，提供这些示例性实施方式，从而使本申请透彻的和详细的向本领域技术人员传达。
另外，为了简洁和清楚，在附图中，各种组件、层的尺寸或厚度可被放大。遍及全文，相同的数值指相同的要素。如本文所使用，术语“及/或”、“以及/或者”包括一个或多个相关列举项目的任何和所有组合。另外，应当理解，当要素A被称为“连接”要素B时，要素A可直接连接至要素B，或可能存在中间要素C并且要素A和要素B可彼此间接连接。
进一步，当描述本申请的实施方式时使用“可”指“本申请的一个或多个实施方式”。
本文使用的专业术语是为了描述具体实施方式的目的并且不旨在限制本申请。如本文所使用，单数形式旨在也包括复数形式，除非上下文另外明确指出。应进一步理解，术语“包括”，当在本说明书中使用时，指存在叙述的特征、数值、步骤、操作、要素和/或组分，但是不排除存在或增加一个或多个其他特征、数值、步骤、操作、要素、组分和/或其组合。
空间相关术语，比如“上”等可在本文用于方便描述，以描述如图中阐释的一个要素或特征与另一要素(多个要素)或特征(多个特征)的关系。应理解，除了图中描述的方向之外，空间相关术语旨在包括设备或装置在使用或操作中的不同方向。例如，如果将图中的设备翻转，则描述为在其他要素或特征“上方”或“上”的要素将定向在其他要素或特征的“下方”或“下面”。因此，示例性术语“上”可包括上面和下面的方向。应理解，尽管术语第一、第二、第三等可在本文用于描述各种要素、组分、区域、层和/或部分，但是这些要素、组分、区域、层和/或部分不应受这些术语的限制。这些术语用于区分一个要素、组分、区域、层或部分与另一要素、组分、区域、层或部分。因此，下面讨论的第一要素、组分、区域、层或部分可称为第二要素、组分、区域、层或部分，而不背离示例性实施方式的教导。
本申请中，X方向指的是自第一层的第一区域向第二区域延伸的方向，Y方向指的是自第一金属板向第二金属板延伸的方向，Z方向指的是与第一金属板的第一表面相垂直的方向，X、Y、Z三个方向相互垂直。
请参阅图1至图3，本申请一实施例提供一种电池100，包括壳体10、电极组件20、电解液(图未示)、第一层30和第二层40。
壳体10包括相对设置的第一部分11和第二部分12。第一部分11和第二部分12的形状相配合。第一部分11包括相互连接的第一区11a和第二区11b。第一区11a与第二部分12相连接，第二区11b的三侧边被第一区11a包围。从Z方向观察时，第二区11b覆盖电极组件20。第二部分12包括相互连接的第三区12a和第四区12b。第三区12a与第一部分11相连接，第四区12b的三侧边被第三区12a包围。从Z方向观察时，第四区12b覆盖电极组件20。第一部分11的第二区11b和第二部分12的第四区12b共同形成一收容腔14，用于收容电解液、部分电极组件20以及第一层30和第二层40的至少一部分。壳体10可以采用封装膜封装得到的包装袋，即电池100为软包电池。
在一些实施例中，用于形成壳体10的封装膜包括依次叠设的保护层、金属层和封装层，封装层靠近电极组件20，而保护层远离电极组件20。保护层的材质为高分子树脂，用于保护金属层，避免金属层因外力作用破损，同时能够阻止外部环境的空气渗透，维持电池100内部处于无水无氧的环境。金属层的材质为金属，例如为铝、钢等，用于阻止外部环境的水分渗透，并防止外力对电池100造成损伤。封装层的材质为聚合物，例如为聚丙烯、聚酰胺等，用于对封装膜进行封装，防止封装膜被电解液中的有机溶剂溶解或溶胀，封装层还用于阻止电解液中的电解质与金属层接触而导致金属层被腐蚀。制备壳体10时，可将封装膜对折，然后利用热封封头在对折后的封装膜表面施加一定的温度和压力 进行热封，使封装膜的封装层熔融相连接。此时，壳体10的最内层为封装层。在另一些实施例中，电池100并不限于软包电池，还可以为钢壳电池或铝壳电池等，本申请并不作限制。
电极组件20包括第一金属板214和第二金属板224。第一金属板214和第二金属板224均从壳体10的一端穿出，以连接外部元件。第一金属板214包括面向第一部分11的第一表面214a和面向第二部分12的第二表面214b。第二金属板224包括面向第一部分11的第三表面224a和面向第二部分12的第四表面224b。
第一层30为片状，其覆盖第一金属板214的第一表面214a的至少一部分和第二金属板224的第三表面224a的至少一部分，并与第一表面214a、第三表面224a和第一部分11的至少一部分均相连接。第一层30的材质包括绝缘材料，该绝缘材料选自聚乙烯、聚丙烯、酚醛树脂、三聚氰胺树脂、不饱和聚酯树脂、环氧树脂、有机硅树脂和聚氨酯中至少一种。
第一层30与金属板的贴合度较壳体10与金属板的贴合度高，由于金属板在封装过程中只经过较短时间的加热和加压过程，如果不在壳体10和金属板之间设置第一层30，金属板与壳体10之间可能存在空隙，或有较大的可能在后续的生命周期中发生分离，严重影响密封性。且第一层30和壳体10的封装层的材料均可为聚合物，熔点较为接近，在高温加压环境下结合度较好，可提高密封性。
第二层40为片状，其覆盖第一金属板214的第二表面214b的至少一部分和第二金属板224的第四表面224b的至少一部分，并与第二表面214b、第四表面224b和第二部分12的至少一部分均相连接。第二层40的材质包括绝缘材料，该绝缘材料选自聚乙烯、聚丙烯、酚醛树脂、三聚氰胺树脂、不饱和聚酯树脂、环氧树脂、有机硅树脂和聚氨酯中至少一种。
在一些实施方式中，第一层30可通过可视光，第二层40可通过可视光。
请参阅图5，电极组件20包括第一电极21、第二电极22和隔离膜23，隔离膜23设置于第一电极21和第二电极22之间。隔离膜23用于防止第一电极21和第二电极22直接接触，从而防止电极组件20短路。电解液用于浸润第一电极21、第二电极22和隔离膜23。图5中，电极组件20为卷绕结构，即，第一电极21、隔离膜23和第二电极22依次层叠卷绕形成电极组件20。在另一些实施例中，电极组件20也可以为叠片结构，即，第一电极21、隔离膜23和第二电极22依次层叠形成电极组件20，本申请并不作限制。
第一电极21包括第一导电体211、第一导电材料层212、第一极耳213和第一金属板214。第一导电体211包括相对设置的第一面211a和第二面211b。第一面211a和第二面211b均包括设有第一导电材料层212的区域和离开第一导电材料层212的区域。第一导电材料层212的材质可为活性材料，例如可为选自LiCoO 2、LiFeP0 4等可脱嵌锂离子的电化学活性物质中的一种或几种。第一极耳213焊接于第一导电体211的第一面211a上，并与第一金属板214的第一表面214a相连接。在其他实施方式中，第一极耳213可由位于离开第一导电材料层212的区域的第一面211a的一端向外延伸形成，并与第一金属板214的第一表面214a相连接，本申请并不作限制。第一金属板214的一端与第一极耳213相连接，其另一端从壳体10的一端伸出壳体10外。第一金属板214在壳体10内与第一电极21相连接，在从Z方向观察时，第一金属板214在第二区11b通过第一区11a延伸至壳体10外。
请参阅图6，本申请另一实施方式提供的电池，其与图5所示电池的区别在于：第一电极体21包括多个第一极耳213，每个第一极耳213由位于离开第一导电材料层212的区域的第一面211a的一端向外延伸形成，并通过转接板24与第一金属板214的第一表面214a相连接。
请参阅图7，第二电极22包括第二导电体221、第二导电材料层222、第二极耳223和第二金属板224。第二导电体221包括相对设置的第三面221a和第四面221b。第三面221a和第四面221b均包括设有第二导电材料层222的区域和离开第二导电材料层222的区域。第二导电材料层222的材质可为活性材料，例如可为选自石墨、软碳、硬碳、Li 4Ti 50 12等可嵌锂离子的电化学活性物质中的一种或几种。第二极耳223由位于离开第二导电材料层222的第三面221a的一端向外延伸形成，并与第二金属板224的第三表面224a相连接。在其他实施方式中，第二极耳223可焊接于第二导电体221的第三面221a上，本申请并不作限制。第二金属板224的一端与第二极耳223相连接，其另一端从壳体10的一端伸出壳体10外。第二金属板224在壳体10内与第二电极22相连接，在从Z方向观察时，第二金属板224在第二区11b通过第一区11a延伸至壳体10外。
壳体10通过第一部分11和第二部分12覆盖第一电极21的一部分、第二电极22的一部分、第一层30的至少一部分和第二层40的至少一部分。
请参阅图4、图5和图7，第一层30包括与位于第一区11a的第一部分11相连接的第一区域31、与第一区域31相连接且位于壳体10外的第二区域32和与第一区域31相连接且位于收容腔14中的第三区域33。具体的，第一区域31为第一层30中沿Z方向的正投影与第一部分11的第一区11a相重合，且在Z方向上夹设于第一部分11的第一区11a和第二部分12的第三区12a之间的区域；第二区域32为第一层30中与第一区域31相连，且从Z方向观察时相较第一部分11在X方向上的端点11aa更远离壳体10的区域；第三区域33为第一层30中与第一区域31相连，且从Z方向观察时相较第一部分11在X方向上的端点11aa更靠近壳体10内部的区域。在一些实施方式中，在第一层30中，沿X方向，第一区域31的长度大于第二区域32的长度，第三区域33的长度大于第一区域31的长度。第二区域32的长度越短，其对后续的封装影响越少。沿Y方向，第一层30的长度小于壳体10的长度。在一些实施方式中，沿Y方向，第一层30的长度小于第二区11b的长度。
请参阅图4和图8，在Y方向上，第一层30和第二层40均覆盖第一金属板214和第二金属板224，且均沿Y方向和与Y方向相反的方向延伸一定距离。第一层30还包括位于第一金属板214和第二金属板224之间的第四区域34、位于第一金属板214的一侧且背离第四区域34的第五区域35以及位于第二金属板224的一侧且背离第四区域34的第六区域36。在沿Z方向观察时，第一层30与第一金属板214具有相重叠的第一重叠部分30a，第一层30与第二金属板224具有相重叠的第二重叠部分30b。第一重叠部分30a包括覆盖第一表面214a的部分第一区域31、部分第二区域32和部分第三区域33，第二重叠部分30b包括覆盖第三表面224a的部分第一区域31、部分第二区域32和部分第三区域33。第四区域34连接第一重叠部分30a和第二重叠部分30b。第五区域35与第一重叠部分30a背离第四区域34的一侧相连接。第六区域36与第二重叠部分30b背离第四区域34的一侧相连接。在沿Z方向观察时，第四区域34与第一区域31、第二区域32和第三区域33分别具有相重叠的第一重叠区域34a、第二重叠区域34b和第三重叠区域34c，第五区域35与第一区域31、第二区域32和第三区域33分别具有相重叠的第四重叠区域35a、第五重叠区域35b和第六重叠区域35c，第六区域36与第一区域31、第二区域32和第三区域33分别具有相重叠的第七重叠区域36a、第八重叠区域36b和第九重叠区域36c。第一层30和第二层40具有相连接的部分。在一些实施方式中，在沿Z方向观察时，第四区域34与第二层40相连接，第五区域35和第六区域36中至少一者与第二层40相连接。在一些实施方式中，第五区域35和第六区域36均与第二层40相连接。其中，第四区域34在第一重叠区域34a、第二 重叠区域34b和第三重叠区域34c中至少一者处与第二层40相连接，第五区域35在第四重叠区域35a、第五重叠区域35b和第六重叠区域35c中至少一者处与第二层40相连接，第六区域36在第七重叠区域36a、第八重叠区域36b和第九重叠区域36c中至少一者处与第二层40相连接。第四区域34覆盖第一金属板214上连接第一表面214a和第二表面214b的一个侧壁以及第二金属板224上连接第三表面224a和第四表面224b的一个侧壁，第五区域35覆盖第一金属板214的另一个侧壁，第六区域36覆盖第二金属板224的另一个侧壁，即第一层30与第一金属板214和第二金属板224的两个侧壁均紧密接触，由此可抑制因为在此处配置第一金属214和第二金属板224带来的壳体10气密性下降的现象发生。在一些实施方式中，第二层40与第一金属板214和第二金属板224的两个侧壁均紧密接触。
在另一些实施方式中，在沿Z方向观察时，第一层30在第一区域31与第二层40相连接。在另一些实施方式中，在沿Z方向观察时，第一层30在第二区域32与第二层40相连接。
请参阅图9，第一层30由一层或多层材料沿Z方向堆叠形成。在一些实施方式中，第一层30由两层材料堆叠形成，包括基材301和胶粘剂层303。基材301的材料可以为聚对苯二甲酸乙二醇酯、聚酰亚胺、聚酰胺酰亚胺中至少一种。胶粘剂层303的材料可以为聚乙烯、聚丙烯、酚醛树脂、三聚氰胺树脂、不饱和聚酯树脂、环氧树脂、有机硅树脂和聚氨酯中至少一种。胶粘剂层303与第一金属板和第二金属板相粘接，基材301与壳体10的封装层具有相熔接的部分。
请参阅图10和图11，在一些实施方式中，在第一层30中，沿X方向，第一区域31的长度小于第二区域32的长度。
请参阅图11和图12，在一些实施方式中，在第一层30中，沿X方向，第一区域31的长度大于第三区域33的长度。第三区域33的长度越短，使得电极组件20占用壳体10的内部空间越少，可提高能量密度。
本申请通过设置位于第一金属板214/第二金属板224和壳体10之间的第一层30/第二层40，实现壳体10内第一电极21和第二电极22的密封；且通过设置均覆盖第一金属板214和第二金属板224的第一层30和第二层40，使第一金属板214和第二金属板224的相对位置被固定，使得在受到外力时第一金属板214和第二金属板224不易倾斜，可避免因倾斜而影响密封性的情况。另外，具有整片形态的第一层30和第二层40使位于第一金属板214和第二金属板224之间的壳体10的第一部分11和第二部分12不会直接接触，从而封印区中各处的高度差较小，进一步提高密封性。
以下通过具体实施例和对比例对本申请作详细说明。
实施例1
将第一层和第二层均与第一金属板和第二金属板连接进行贴胶，然后将第一金属板和第二金属板分别与第一极耳和第二极耳进行焊接，其中贴胶工序和焊接工序的顺序可交换。接着将第一电极、第二电极和隔离膜一起卷绕得到电极组件。然后进行注液、化成、封装，制成如图2所示的电池。
对比例1
与实施例1不同之处在于，请参照图13，将两个第三层210分别与第一金属板214和第二金属板224连接进行贴胶。第三层210包括绝缘材料。
每组实施例和对比例的电池各取100个进行测试，然后统计每组电池的成品优率，并将结果记录于表1中。
表1
  成品优率
实施例1 98％
对比例1 87％
从表1数据可知，实施例1的成品优率高于对比例1，其通过使第一层30和第二层40均与第一金属板214和第二金属板224相连接，将第一金属板214和第二金属板224的相对位置固定，在受到外力的情况下，该种技术方案抑制第一金属板214和第二金属板224倾斜的效果较好，从而提高密封性，提高了成品优率。而对比例1中，两个第三层210分别贴在第一金属板214和第二金属板224上，在受到外力的情况下，该种技术方案防止第一金属板214和第二金属板224倾斜的效果不够(如图13所示)，从而影响密封性，降低了成品优率。
以上所揭露的仅为本申请较佳实施方式而已，当然不能以此来限定本申请，因此依本申请所作的等同变化，仍属本申请所涵盖的范围。

Claims (24)

  1. 一种电池，包括第一电极、第二电极、第一层和壳体，其特征在于：
    所述第一电极包括具有第一面和第二面的第一导电体以及与所述第一导电体的第一面相连接的第一金属板；
    所述第二电极包括具有第三面和第四面的第二导电体以及与所述第二导电体的第三面相连接的第二金属板；
    所述第一层包括绝缘材料并与所述第一金属板的第一表面和所述第二金属板的第三表面相连接；
    所述壳体包括第一部分和第二部分，并通过所述第一部分和所述第二部分覆盖所述第一电极、所述第二电极以及所述第一层的至少一部分，所述第一部分的至少一部分与所述第一层相连接。
  2. 如权利要求1所述的电池，其特征在于，所述第一层包括与所述第一部分相连接的第一区域以及与所述第一区域相连接且离开所述壳体的第二区域。
  3. 如权利要求1所述的电池，其特征在于，所述第一层包括与所述第一部分相连接的第一区域以及与所述第一区域相连接且被所述壳体覆盖的第三区域。
  4. 如权利要求2所述的电池，其特征在于，所述第一层还包括与所述第一区域相连接且被所述壳体覆盖的第三区域。
  5. 如权利要求2所述的电池，其特征在于，在所述第一层中，沿自所述第一区域向所述第二区域延伸的第一方向，所述第一区域的长度小于所述第二区域的长度。
  6. 如权利要求2所述的电池，其特征在于，在所述第一层中，沿自所述第一区域向所述第二区域延伸的第一方向，所述第一区域的长度大于所述第二区域的长度。
  7. 如权利要求4所述的电池，其特征在于，在所述第一层中，沿自所述第一区域向所述第二区域延伸的第一方向，所述第三区域的长度小于所述第二区域的长度。
  8. 如权利要求4所述的电池，其特征在于，在所述第一层中，沿自所述第一区域向所述第二区域延伸的第一方向，所述第三区域的长度大于所述第二区域的长度。
  9. 如权利要求1所述的电池，其特征在于，沿所述第一金属板向所述第二金属板延伸的第二方向，所述第一层的长度小于所述壳体的长度。
  10. 如权利要求1所述的电池，其特征在于，所述第一层由一层或多层材料沿与所述第一金属板的第一表面垂直的第三方向堆叠形成。
  11. 如权利要求1所述的电池，其特征在于，所述第一层离开所述第一导电体设置。
  12. 如权利要求1所述的电池，其特征在于，所述电池还包括含有绝缘材料的第二层，所述第二层与所述第一金属板的第二表面和所述第二金属板的第四表面均相连接。
  13. 如权利要求12所述的电池，其特征在于，所述第一层和所述第二层相连接。
  14. 如权利要求13所述的电池，其特征在于，所述第一层包括位于所述第一金属板和所述第二金属板之间的第四区域，在沿与所述第一金属板的第一表面垂直的第三方向观察时，所述第四区域与所述第二层相连接。
  15. 如权利要求14所述的电池，其特征在于，所述第一层还包括位于所述第一金属板的一侧且背离所述第四区域的第五区域以及位于所述第二金属板的一侧且背离所述第四区域的第六区域，在沿与所述第一金属板的第一表面垂直的第三方向观察时，所述第五区域和所述第六区域中至少一者与所述第二层相连接。
  16. 如权利要求13所述的电池，其特征在于，所述第一层包括与所述第一部分相连接的第一区域以及与所述第一区域相连接且离开所述壳体的第二区域。
  17. 如权利要求16所述的电池，其特征在于，在沿与所述第一金属板的第一表面垂直的第三方向观察时，所述第一层至少在所述第一区域与所述第二层相连接。
  18. 如权利要求16所述的电池，其特征在于，在沿与所述第一金属板的第一表面垂直的第三方向观察时，所述第一层至少在所述第二区域与所述第二层相连接。
  19. 如权利要求13所述的电池，其特征在于，所述第一层包括与所述第一部分相连接的第一区域以及与所述第一区域相连接且被所述壳体覆盖的第三区域。
  20. 如权利要求19所述的电池，其特征在于，在沿与所述第一金属板的第一表面垂直的第三方向观察时，所述第一层至少在所述第三区域与所述第二层相连接。
  21. 如权利要求1所述的电池，其特征在于，所述第一层包括聚乙烯、聚丙烯、酚醛树脂、三聚氰胺树脂、不饱和聚酯树脂、环氧树脂、有机硅树脂和聚氨酯中至少一种。
  22. 如权利要求12所述的电池，其特征在于，所述第二层包括聚乙烯、聚丙烯、酚醛树脂、三聚氰胺树脂、不饱和聚酯树脂、环氧树脂、有机硅树脂和聚氨酯中至少一种。
  23. 如权利要求1所述的电池，其特征在于，所述第一层可通过可视光。
  24. 如权利要求12所述的电池，其特征在于，所述第二层可通过可视光。
PCT/CN2021/084702 2021-03-31 2021-03-31 电池 Ceased WO2022205193A1 (zh)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP21870551.5A EP4095993A4 (en) 2021-03-31 2021-03-31 BATTERY
PCT/CN2021/084702 WO2022205193A1 (zh) 2021-03-31 2021-03-31 电池
JP2022520104A JP2023523113A (ja) 2021-03-31 2021-03-31 電池
US17/709,907 US20220320638A1 (en) 2021-03-31 2022-03-31 Battery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2021/084702 WO2022205193A1 (zh) 2021-03-31 2021-03-31 电池

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US17/709,907 Continuation US20220320638A1 (en) 2021-03-31 2022-03-31 Battery

Publications (1)

Publication Number Publication Date
WO2022205193A1 true WO2022205193A1 (zh) 2022-10-06

Family

ID=83448377

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2021/084702 Ceased WO2022205193A1 (zh) 2021-03-31 2021-03-31 电池

Country Status (4)

Country Link
US (1) US20220320638A1 (zh)
EP (1) EP4095993A4 (zh)
JP (1) JP2023523113A (zh)
WO (1) WO2022205193A1 (zh)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000353504A (ja) * 1999-06-10 2000-12-19 Yuasa Corp ラミネートパック電池
JP2002260603A (ja) * 2001-03-02 2002-09-13 Asahi Kasei Corp ラミネート外装密閉電池
CN104094449A (zh) * 2012-01-31 2014-10-08 凸版印刷株式会社 二次电池用电极端子
CN108886117A (zh) * 2016-12-16 2018-11-23 大日本印刷株式会社 金属端子用粘接性膜和电池
CN110447120A (zh) * 2017-03-10 2019-11-12 远景Aesc能源元器件有限公司 锂离子电池

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5021961B2 (ja) * 2006-06-16 2012-09-12 Ｎｅｃエナジーデバイス株式会社 ラミネート電池およびその製造方法
KR100917734B1 (ko) * 2007-07-19 2009-09-21 삼성에스디아이 주식회사 파우치형 리튬 이차전지
JP4835742B2 (ja) * 2009-02-20 2011-12-14 ソニー株式会社 電池および電池パック
JP5510410B2 (ja) * 2011-08-02 2014-06-04 株式会社Ｇｓユアサ 電池
EP3010069B1 (en) * 2013-06-14 2018-11-07 Automotive Energy Supply Corporation Secondary battery
KR102211525B1 (ko) * 2014-06-17 2021-02-02 삼성에스디아이 주식회사 코너 폴딩부를 갖는 이차 전지
JP6405856B2 (ja) * 2014-10-01 2018-10-17 住友電気工業株式会社 リード部材およびリード部材の製造方法
JP6413682B2 (ja) * 2014-11-17 2018-10-31 住友電気工業株式会社 リード部材および電池
JP6497994B2 (ja) * 2015-03-17 2019-04-10 セイコーインスツル株式会社 電気化学セルの製造方法
WO2017010046A1 (ja) * 2015-07-10 2017-01-19 パナソニックＩｐマネジメント株式会社 捲回型電池
JP2017134960A (ja) * 2016-01-27 2017-08-03 Fdk株式会社 ラミネート型蓄電素子およびラミネート型蓄電素子の製造方法
JP6868399B2 (ja) * 2017-01-12 2021-05-12 Fdk株式会社 ラミネート型蓄電素子
JP6876425B2 (ja) * 2016-12-21 2021-05-26 Fdk株式会社 ラミネート型蓄電素子
CN112086585B (zh) * 2019-06-14 2023-09-26 东莞新能德科技有限公司 电池

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000353504A (ja) * 1999-06-10 2000-12-19 Yuasa Corp ラミネートパック電池
JP2002260603A (ja) * 2001-03-02 2002-09-13 Asahi Kasei Corp ラミネート外装密閉電池
CN104094449A (zh) * 2012-01-31 2014-10-08 凸版印刷株式会社 二次电池用电极端子
CN108886117A (zh) * 2016-12-16 2018-11-23 大日本印刷株式会社 金属端子用粘接性膜和电池
CN110447120A (zh) * 2017-03-10 2019-11-12 远景Aesc能源元器件有限公司 锂离子电池

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP4095993A4 *

Also Published As

Publication number Publication date
EP4095993A1 (en) 2022-11-30
US20220320638A1 (en) 2022-10-06
JP2023523113A (ja) 2023-06-02
EP4095993A4 (en) 2023-11-29

Similar Documents

Publication Publication Date Title
US20230187792A1 (en) Rechargable battery cell
CN113097436B (zh) 电池
US10587010B2 (en) Rechargeable battery and rechargeable battery module
KR102143625B1 (ko) 미실링부를 갖는 파우치 타입 이차 전지
US8778531B2 (en) Pouch-type lithium polymer battery and method for manufacturing the same
CN102097611B (zh) 二次电池
US8795864B2 (en) Lithium polymer battery
EP3817082B1 (en) Pouch case and the method of manufacturing the pouch type secondary battery including the same
KR102143627B1 (ko) 파우치 타입 이차 전지
KR101596269B1 (ko) 안전성이 향상된 신규한 구조의 전지셀
US9450217B2 (en) Pouch battery and manufacturing method thereof
US10333127B2 (en) Rechargeable battery module
CN113725523B (zh) 电池单体及电池模组
KR101011807B1 (ko) 개선된 구조의 상단 실링부를 포함하고 있는 이차전지
CN116231185A (zh) 二次电池
CN116404171A (zh) 二次电池
KR102926306B1 (ko) 안전성이 향상된 파우치형 전지 셀 및 이를 포함하는 전지 모듈
KR20150115358A (ko) 전극조립체 및 이를 포함하는 이차 전지
KR20200008877A (ko) 이차 전지
KR102890293B1 (ko) 이차전지 및 이를 포함하는 디바이스
EP4531191A1 (en) Rechargeable battery
WO2022205193A1 (zh) 电池
CN117766948A (zh) 二次电池
WO2022196460A1 (ja) 電気化学セル
JP7056466B2 (ja) 蓄電モジュール

Legal Events

Date Code Title Description
ENP Entry into the national phase

Ref document number: 2022520104

Country of ref document: JP

Kind code of ref document: A

WWE Wipo information: entry into national phase

Ref document number: 202217019535

Country of ref document: IN

ENP Entry into the national phase

Ref document number: 2021870551

Country of ref document: EP

Effective date: 20220331

NENP Non-entry into the national phase

Ref country code: DE