WO2024016452A1 - Séparateur, élément de batterie, moule de pressage à chaud, batterie et dispositif électrique - Google Patents

Séparateur, élément de batterie, moule de pressage à chaud, batterie et dispositif électrique Download PDF

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Publication number
WO2024016452A1
WO2024016452A1 PCT/CN2022/118487 CN2022118487W WO2024016452A1 WO 2024016452 A1 WO2024016452 A1 WO 2024016452A1 CN 2022118487 W CN2022118487 W CN 2022118487W WO 2024016452 A1 WO2024016452 A1 WO 2024016452A1
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WIPO (PCT)
Prior art keywords
adhesive layer
battery
separator
present application
adhesive
Prior art date
Application number
PCT/CN2022/118487
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English (en)
Chinese (zh)
Inventor
刘桓基
Original Assignee
宁德时代新能源科技股份有限公司
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Publication of WO2024016452A1 publication Critical patent/WO2024016452A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/20—Adhesives in the form of films or foils characterised by their carriers
    • C09J7/29—Laminated material
    • 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
    • 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
    • H01M10/054—Accumulators with insertion or intercalation of metals other than lithium, e.g. with magnesium or aluminium
    • 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
    • H01M50/409—Separators, membranes or diaphragms characterised by the material
    • H01M50/449—Separators, membranes or diaphragms characterised by the material having a layered 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

  • This application relates to the field of battery technology, and in particular to a separator, a battery cell, a hot pressing mold, a battery and an electrical device.
  • batteries are widely used in electronic equipment, such as mobile phones, laptops, battery cars, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, electric tools, etc. .
  • the battery cell includes an anode plate, a separator and a cathode plate.
  • the separator is located between the anode plate and the cathode plate. The separator separates the anode and cathode plates to prevent direct contact between the anode and cathode to cause a short circuit in the battery.
  • the battery will emit heat during use, and the separator will shrink when heated, which can easily cause the positive and negative poles of the battery to come into direct contact and cause a short circuit in the battery.
  • one object of the present application is to provide a separator, a battery cell, a hot-pressing mold, a battery, and an electrical device to solve the problem of a short circuit in the battery caused by thermal shrinkage of the separator.
  • An embodiment of the first aspect of the present application provides a separator.
  • the separator includes: a base material having two first areas and a second area. The second area is located between the two first areas in the width direction of the base material. ;
  • the second adhesive layer is disposed on the two opposite surfaces of each of the two first areas of the base material along the thickness direction. The adhesive force of the second adhesive layer is greater than or equal to 1N/m and less than or equal to 1N/m. Equal to 40N/m.
  • the second adhesive layer on the separator Arrange the second adhesive layer on the separator. After the pole pieces are made, stack or curl the pole pieces.
  • the second adhesive layer on the separator will be laminated. Both surfaces of the base material have the second adhesive layer. This stacking
  • the separators that are together can be bonded together through their own second adhesive layer to fix the separators and avoid battery short circuit due to shrinkage of the separators.
  • the adhesive force of the second adhesive layer is greater than or equal to 1N/m and less than or equal to 40N/m, which ensures the adhesive force of the second adhesive layer and prevents the separator from coming off.
  • the adhesive force of the second adhesive layer is greater than or equal to 5 N/m and less than or equal to 40 N/m.
  • the adhesive force of the second adhesive layer is further limited to ensure the adhesion between the separators and achieve effective fixation of the separators.
  • the width of the second adhesive layer is less than or equal to 20 mm in the width direction of the substrate. Ensure that there is a second adhesive layer on the base material that can be used to fix the diaphragm, and at the same time, avoid the width of the second adhesive layer being too wide, which will affect the size of the diaphragm.
  • the width of the second adhesive layer is greater than or equal to 7 mm and less than or equal to 11 mm in the width direction of the substrate. Further limiting the width of the second adhesive layer not only ensures the fixing effect on the diaphragm, but also avoids affecting the size of the diaphragm.
  • the separator further includes: a first insulating layer disposed on two opposite surfaces of the second region of the substrate along the thickness direction, and the first insulating layer includes adhesive glue and ceramic slurry.
  • the first insulating layer is used to ensure the insulation of the separator and prevent the cathode and anode plates from being in direct contact and causing a battery short circuit.
  • Ceramic slurry is a commonly used insulating material with good insulation properties. The adhesive glue and ceramic slurry are mixed to ensure that the ceramic slurry can be bonded to the base material.
  • the separator further includes: a second insulating layer, which is disposed on two opposite surfaces of the base material in the thickness direction and completely covers both surfaces of the base material. In the thickness direction of the base material, the second insulating layer is located Between the second adhesive layer and the base material, the second insulating layer includes adhesive glue and ceramic slurry.
  • the second insulating layer is used to ensure the insulation of the separator and prevent the cathode and anode plates from being in direct contact and causing a battery short circuit.
  • Ceramic slurry is a commonly used insulating material with good insulation properties. The adhesive glue and ceramic slurry are mixed to ensure that the ceramic slurry can be bonded to the base material.
  • the second embodiment of the present application provides a battery cell.
  • the battery cell includes a pole piece and the separator in the above embodiment.
  • the second adhesive layers of the two separators located on both sides of the same pole piece are fixed together.
  • the separators stacked together can be bonded together through a second adhesive layer to fix the separators.
  • the separator in the battery cell can be effectively fixed.
  • the separator will not shrink, so that the separator can separate the cathode and anode tabs and avoid direct contact between the cathode and anode tabs to cause a battery short circuit.
  • the second adhesive layer fixed together is located on both sides of the active material layer of the pole piece in the width direction of the separator substrate. This prevents the second adhesive layer from affecting the active material layer and thus affecting the performance of the battery.
  • a third embodiment of the present application provides a hot-pressing mold.
  • the hot-pressing mold is used to produce the battery cell in the above embodiment.
  • the hot-pressing mold includes: a first splint; at least two first bumps; at least two first bumps;
  • the first protrusions are all located on the same first surface of the first plywood, and in the width direction of the first plywood, some of the at least two first protrusions are disposed close to a certain side of the first surface, and the other part is disposed close to The other side of the first surface is provided, wherein one side and the other side are opposite sides of the first surface, so that when making the battery cell, the positions of at least two first bumps are in line with the second The position of the adhesive layer corresponds.
  • pressure can be applied to the diaphragm and the pole piece through the first bump on the first plywood.
  • the second adhesive layer on the diaphragm is thermally compounded and bonded together to prevent The diaphragm shrinks at high temperatures.
  • the hot pressing mold further includes: a second plywood, opposite to the first plywood; at least two second protrusions, the at least two second protrusions are located on the same second surface of the second plywood, and the One surface is opposite to the second surface, and the positions of at least two second bumps correspond to the positions of at least two first bumps.
  • the first bump and the second bump on the hot pressing mold simultaneously apply pressure to the diaphragm and the pole piece. Under the action of heat, the second adhesive layer on the diaphragm is thermally compounded and bonded together to prevent the diaphragm from shrinking at high temperatures. .
  • An embodiment of the fourth aspect of the present application provides a battery.
  • the battery includes at least two battery cells in the above embodiment.
  • An embodiment of the fifth aspect of the present application provides an electric device.
  • the electric device includes the battery in the above embodiment, and the battery is used to provide electric energy.
  • Figure 1 is a schematic structural diagram of a vehicle according to some embodiments of the present application.
  • Figure 2 is a schematic diagram of the exploded structure of a battery according to some embodiments of the present application.
  • Figure 3 is a schematic diagram of the exploded structure of a battery cell according to some embodiments of the present application.
  • Figure 4 is a top view of a current collector provided by some embodiments of the present application.
  • Figure 5 is a schematic cross-sectional view of a current collector provided by some embodiments of the present application.
  • Figure 6 is a schematic cross-sectional view of a current collector provided by some embodiments of the present application.
  • Figure 7 is a schematic cross-sectional view of a current collector provided by some embodiments of the present application.
  • Figure 8 is a top view of the pole piece provided by some embodiments of the present application.
  • Figure 9 is a schematic cross-sectional view of a pole piece provided by some embodiments of the present application.
  • Figure 10 is a schematic diagram of the pole piece manufacturing process provided by some embodiments of the present application.
  • Figure 11 is a top view of a separator provided by some embodiments of the present application.
  • Figure 12 is a cross-sectional view of a separator provided by some embodiments of the present application.
  • Figure 13 is a cross-sectional view of a separator provided by some embodiments of the present application.
  • Figure 14 is a cross-sectional view of a pole piece provided by some embodiments of the present application.
  • Figure 15 is a cross-sectional view of a pole piece provided by some embodiments of the present application.
  • Figure 16 is a cross-sectional view of the cooperation between the pole piece and the diaphragm provided by some embodiments of the present application;
  • Figure 17 is a structural diagram of a hot pressing mold provided by some embodiments of the present application.
  • Figure 18 is a structural diagram of the hot pressing mold provided by some embodiments of the present application from another perspective;
  • Figure 19 is a front view of a hot pressing mold provided by some embodiments of the present application.
  • FIG. 20 is a cross-sectional view along the C-C plane in FIG. 19 .
  • an embodiment means that a particular feature, structure or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application.
  • the appearances of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those skilled in the art understand, both explicitly and implicitly, that the embodiments described herein may be combined with other embodiments.
  • multiple refers to more than two (including two).
  • multiple groups refers to two or more groups (including two groups), and “multiple pieces” refers to It is more than two pieces (including two pieces).
  • Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles and electric cars, as well as in many fields such as military equipment and aerospace. . As the application fields of power batteries continue to expand, their market demand is also constantly expanding.
  • the temperature of the battery will increase during use. As the temperature of the battery increases, the battery may short-circuit.
  • a separator is arranged between the anode and cathode tabs in the battery cell. The separator separates the anode and cathode tabs.
  • the temperature of the battery will inevitably increase, and the separator will heat up after being heated. It will shrink. After the separator shrinks, it cannot effectively separate the cathode and anode plates, causing direct contact between the anode and cathode plates, causing the battery to short-circuit.
  • the pole piece includes a current collector and an active material arranged on the current collector.
  • the applicant designed a current collector and a separator after in-depth research, and arranged them on both The first adhesive layer and the second adhesive layer fix the separator through the first adhesive layer or the second adhesive layer. Even if the battery temperature rises, the separator cannot move after being heated, which can effectively separate the cathode plates. and anode plates to avoid battery short circuit due to separator shrinkage.
  • the battery cells disclosed in the embodiments of the present application can be used in, but are not limited to, electrical devices such as vehicles, ships, or aircrafts.
  • the power supply system of the electrical device composed of the battery cells and batteries disclosed in this application can be used to improve the stability of battery performance and battery life.
  • Embodiments of the present application provide an electrical device that uses a battery as a power source.
  • the electrical device may be, but is not limited to, a mobile phone, a tablet, a laptop, an electric toy, an electric tool, a battery car, an electric vehicle, a ship, a spacecraft, etc.
  • electric toys can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, electric airplane toys, etc.
  • spacecraft can include airplanes, rockets, space shuttles, spaceships, etc.
  • an electric device 1000 according to an embodiment of the present application is used as an example.
  • FIG. 1 is a schematic structural diagram of a vehicle 1000 provided by some embodiments of the present application.
  • the vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc.
  • the battery 100 is disposed inside the vehicle 1000 , and the battery 100 may be disposed at the bottom, head, or tail of the vehicle 1000 .
  • the battery 100 may be used to power the vehicle 1000 , for example, the battery 100 may serve as an operating power source for the vehicle 1000 .
  • the vehicle 1000 may also include a controller 200 and a motor 300 .
  • the controller 200 is used to control the battery 100 to provide power to the motor 300 , for example, for starting, navigating and driving the vehicle 1000 .
  • the battery 100 can not only be used as an operating power source for the vehicle 1000 , but also can be used as a driving power source for the vehicle 1000 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000 .
  • FIG. 2 is an exploded view of the battery 100 provided by some embodiments of the present application.
  • the battery 100 includes a case 10 and battery cells 20 , and the battery cells 20 are accommodated in the case 10 .
  • the box 10 is used to provide an accommodation space for the battery cells 20, and the box 10 can adopt a variety of structures.
  • the box 10 may include a first part 101 and a second part 102 , the first part 101 and the second part 102 cover each other, and the first part 101 and the second part 102 jointly define a space for accommodating the battery cells 20 of accommodation space.
  • the second part 102 may be a hollow structure with one end open, and the first part 101 may be a plate-like structure.
  • the first part 101 covers the open side of the second part 102 so that the first part 101 and the second part 102 jointly define a receiving space.
  • the first part 101 and the second part 102 may also be hollow structures with one side open, and the open side of the first part 101 is covered with the open side of the second part 102.
  • the box 10 formed by the first part 101 and the second part 102 can be in various shapes, such as a cylinder, a cuboid, etc.
  • the battery 100 there may be a plurality of battery cells 20, and the plurality of battery cells 20 may be connected in series, in parallel, or in mixed connection.
  • Mixed connection means that the plurality of battery cells 20 are connected in series and in parallel.
  • the plurality of battery cells 20 can be directly connected in series or in parallel or mixed together, and then the whole composed of the plurality of battery cells 20 can be accommodated in the box 10 ; of course, the battery 100 can also be a plurality of battery cells 20 First, the battery modules are connected in series, parallel, or mixed to form a battery module, and then multiple battery modules are connected in series, parallel, or mixed to form a whole, and are accommodated in the box 10 .
  • the battery 100 may also include other structures.
  • the battery 100 may further include a bus component for realizing electrical connections between multiple battery cells 20 .
  • Each battery cell 20 may be a secondary battery or a primary battery; it may also be a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but is not limited thereto.
  • the battery cell 20 may be in the shape of a cylinder, a flat body, a rectangular parallelepiped or other shapes.
  • FIG. 3 is an exploded structural diagram of a battery cell 20 provided in some embodiments of the present application.
  • the battery cell 20 refers to the smallest unit that constitutes the battery.
  • the battery cell 20 includes an end cover 201 , a housing 202 , a battery cell assembly 203 and other functional components.
  • the end cap 201 refers to a component that covers the opening of the case 202 to isolate the internal environment of the battery cell 20 from the external environment.
  • the shape of the end cap 201 can be adapted to the shape of the housing 202 to fit the housing 202 .
  • the end cap 201 can be made of a material with a certain hardness and strength (such as aluminum alloy). In this way, the end cap 201 is less likely to deform when subjected to extrusion and collision, so that the battery cell 20 can have better performance. With high structural strength, safety performance can also be improved.
  • Functional components such as electrode terminals 2011 may be provided on the end cap 201 .
  • the electrode terminal 2011 may be used to electrically connect with the battery cell assembly 203 for outputting or inputting electrical energy of the battery cell 20 .
  • the end cap 201 may also be provided with a pressure relief mechanism for releasing the internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold.
  • the end cap 201 can also be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which are not particularly limited in the embodiment of the present application.
  • an insulating member may also be provided inside the end cover 201, and the insulating member may be used to isolate the electrical connection components in the housing 202 from the end cover 201 to reduce the risk of short circuit.
  • the insulating member may be plastic, rubber, etc.
  • the housing 202 is a component used to cooperate with the end cover 201 to form an internal environment of the battery cell 20 , wherein the formed internal environment can be used to accommodate the battery cell assembly 203 , electrolyte, and other components.
  • the housing 202 and the end cover 201 may be independent components, and an opening may be provided on the housing 202.
  • the end cover 201 covers the opening at the opening to form the internal environment of the battery cell 20.
  • the end cap 201 and the shell 202 can also be integrated. Specifically, the end cap 201 and the shell 202 can form a common connection surface before other components are put into the shell. When it is necessary to encapsulate the inside of the shell 202 When the end cap 201 is closed, the housing 202 is closed.
  • the housing 202 can be of various shapes and sizes, such as rectangular parallelepiped, cylinder, hexagonal prism, etc. Specifically, the shape of the housing 202 can be determined according to the specific shape and size of the battery cell assembly 203 .
  • the housing 202 can be made of a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which are not particularly limited in the embodiment of the present application.
  • the battery cell assembly 203 is a component in the battery cell 20 where electrochemical reactions occur.
  • One or more battery cell assemblies 203 may be contained within the housing 202 .
  • the battery cell assembly 203 is mainly formed by winding or stacking an anode electrode sheet and a cathode electrode sheet, and a separator is usually provided between the anode electrode sheet and the cathode electrode sheet.
  • the portions of the anode and cathode plates that contain active material constitute the main body of the battery cell assembly, and the portions of the anode and cathode plates that do not contain active material each constitute the battery tab 2031 .
  • the anode tab and the cathode tab can be located together at one end of the main body or respectively at both ends of the main body.
  • the anode active material and the cathode active material react with the electrolyte, and the battery tabs 2031 are connected to the electrode terminals to form a current loop.
  • FIG. 4 is a top view of a current collector provided by some embodiments of the present application
  • FIG. 5 is a schematic cross-sectional view of a current collector provided by some embodiments of the present application.
  • the embodiment of the present application provides a current collector 11 including a current collector body 111 and a first adhesive layer 112 .
  • the current collector body 111 has an active material area 1111, a tab area 1112 and a glue coating area 1113.
  • the tab area 1112 is located on one side of the active material area 1111, and the glue coating area 1113 is located between the active material area 1111 and the tab area 1112.
  • the first adhesive layer 112 is disposed in the glue coating area 1113.
  • the adhesive force of the first adhesive layer 112 is greater than or equal to 1 Newton per meter (N/m) and less than or equal to 40 N/m.
  • the first adhesive layer 112 is For bonding to the separator of the battery cell.
  • the current collector 11 refers to a structure or part that collects current.
  • the main function of the current collector 11 is to connect the powdery active materials through coating. , the current generated by the active material is collected and output, and the electrode current is input to the active material.
  • the current collector body 111 is the carrier of the current collector 11, which mainly refers to a metal foil in a lithium-ion battery.
  • the current collector body 111 of the anode plate is usually made of aluminum foil.
  • Aluminum foil has serious corrosion problems at low potentials and is mainly used for anode plates.
  • the current collector body 111 of the cathode plate is usually made of copper foil. Since copper foil is easily oxidized at a higher potential, it is mainly used for cathode plates with lower potential.
  • the active material area 1111 is used for arranging the active material layer 12
  • the glue coating area 1113 is used for arranging the first adhesive layer 112
  • the tab area 1112 is used for arranging the tabs 13 .
  • the active material area 1111 is quadrilateral, and the glue-coating areas 1113 are located on opposite sides of the active material area 1111. That is, the current collector body 111 has two glue-coating areas 1113, one of which is located on the active material area 1113. Between material area 1111 and tab area 1112.
  • the first adhesive layer 112 is located in the glue coating area 1113, that is, the first adhesive layer 112 is located on opposite sides of the active material area 1111.
  • the adhesive force of the first adhesive layer 112 is greater than or equal to 1 N/m and less than or equal to 40N/m, ensuring the adhesive force of the first adhesive layer 112.
  • the adhesive force can be measured by a tensile tester.
  • the first adhesive layer 112 is arranged on the current collector 11, and the current collector 11 is applied to the pole piece 1.
  • the first adhesive layer 112 can be used to The pole piece 1 and the diaphragm 2 are bonded to fix the diaphragm 2. In this way, even if the temperature of the battery rises, when the separator 2 is heated, both sides of the separator 2 are fixed, and the separator 2 will not shrink, so that the separator 2 can separate the cathode pole piece and the anode pole piece, and avoid the cathode pole piece and the anode pole piece. Direct contact causes the battery to short circuit.
  • the adhesive force of the first adhesive layer 112 is greater than or equal to 1 N/m and less than or equal to 40 N/m, ensuring the adhesive force of the first adhesive layer 112 , that is, ensuring that the first adhesive layer 112 and the separator 2 to prevent the first adhesive layer 112 from shrinking too much when heated, causing the diaphragm 2 to detach from the first adhesive layer 112 and failing to fix the diaphragm 2 .
  • the adhesive force of the first adhesive layer 112 is greater than or equal to 5 N/m and less than or equal to 40 N/m.
  • the adhesive force of the first adhesive layer 112 is 5 N/m, or the adhesive force of the first adhesive layer 112 is 10 N/m, or the adhesive force of the first adhesive layer 112 is 20 N/m. , or the adhesive force of the first adhesive layer 112 is 30 N/m, or the adhesive force of the first adhesive layer 112 is 40 N/m.
  • the adhesive force of the first adhesive layer 112 can be other values, which is not limited by this application.
  • the adhesive force of the first adhesive layer 112 is further limited to ensure the adhesion between the first adhesive layer 112 and the separator 2 and achieve effective fixation of the separator 2 .
  • the width L1 (L2) of the first adhesive layer 112 is less than or equal to 20 millimeters (mm).
  • the arrangement direction A of the glue coating area 1113 and the active material area 1111 is also the extending direction of one side of the current collector body 111 .
  • the arrangement direction A of the glue coating area 1113 and the active material area 1111 is the width direction of the current collector body 111.
  • the glue coating area 1113 and the active material area 1111 The arrangement direction A may be the length direction of the current collector body 111 .
  • the width of the first adhesive layer 112 on the side of the current collector 11 where the tab area 1112 is located is L1
  • the width of the first adhesive layer 112 on the side opposite to the tab area 1112 of the current collector 11 is L1.
  • the width is L2. L1 and L2 may or may not be equal.
  • L1 is 8mm and L2 is 10mm; or both L1 and L2 are 12mm.
  • Limiting the width L1 (L2) of the first adhesive layer 112 to less than or equal to 20 mm not only ensures that the first adhesive layer 112 on the current collector 11 can be used to fix the separator 2, but also prevents the width of the first adhesive layer 112 from being too wide. , causing the width of the glue coating area 1113 to be too wide, causing the width of the active material area 1111 to be too narrow, thus affecting the capacitance of the battery cell.
  • the width L1 (L2) of the first adhesive layer 112 is greater than or equal to 7 mm and less than or equal to 11 mm.
  • the width L1 (L2) of the first adhesive layer 112 is 7 mm, or the width L1 (L2) of the first adhesive layer 112 is 8 mm, or the width L1 (L2) of the first adhesive layer 112 is 9 mm. , or the width L1 (L2) of the first adhesive layer 112 is 10 mm, or the width L1 (L2) of the first adhesive layer 112 is 11 mm.
  • the width L1 (L2) of the first adhesive layer 112 can be other values, which is not limited by this application.
  • the width L1 (L2) of the first adhesive layer 112 is further limited to be greater than or equal to 7 mm and less than or equal to 11 mm, which not only ensures the fixation effect of the current collector 11 on the separator 2, but also avoids affecting the capacitance of the battery cells.
  • the material for preparing the first adhesive layer 112 includes adhesive glue, and the ratio of the mass of the adhesive glue to the total mass of the first adhesive layer 112 is greater than or equal to 10% and less than or equal to 50%. .
  • the adhesive glue ensures the adhesive force of the first adhesive layer 112 .
  • the mass of the adhesive glue accounts for 10% of the total mass of the first adhesive layer 112; the mass of the adhesive glue accounts for 20% of the total mass of the first adhesive layer 112; the mass of the adhesive glue accounts for 10% of the total mass of the first adhesive layer 112; The mass of the adhesive layer 112 accounts for 30% of the total mass of the first adhesive layer 112 ; the mass of the adhesive glue accounts for 40% of the total mass of the first adhesive layer 112 ; and the mass of the adhesive glue accounts for 50% of the total mass of the first adhesive layer 112 .
  • the mass proportion of the adhesive glue in the first adhesive layer 112 is increased to ensure the adhesion of the current collector 11 to the separator 2 so that the current collector 11 can effectively fix the separator 2 .
  • Figure 6 is a schematic cross-sectional view of a current collector provided by some embodiments of the present application.
  • the first adhesive layer 112 includes ceramic slurry and adhesive glue; or, Figure 7 is a schematic diagram of the present application. Some embodiments provide a schematic cross-sectional view of a current collector. Refer to FIG. 7 .
  • the first adhesive layer 112 includes a stacked ceramic slurry layer 1121 and an adhesive layer 1122 .
  • the ceramic slurry layer 1121 is located between the current collector body 111 and the adhesive layer 1122 . between the glue layers 1122.
  • the battery capacity loss caused by internal spontaneous reactions is the battery's self-discharge.
  • the battery's self-discharge will cause the battery capacity loss.
  • a layer of ceramic slurry can be applied to the edge of the current collector 11 to reduce battery self-discharge.
  • the ceramic slurry and the adhesive glue are first mixed and then applied on the glue coating area 1113 of the current collector body 111 .
  • the first adhesive layer 112 includes a stacked ceramic slurry layer 1121 and an adhesive glue layer 1122, a layer of ceramic slurry layer 1121 can be first applied to the glue coating area 1113 of the current collector body 111, and then An adhesive layer 1122 is coated on the ceramic slurry layer 1121 .
  • the adhesive glue is evenly distributed in the first adhesive layer 112 to ensure that the first adhesive layer 112 is in contact with the diaphragm 2
  • the adhesion enables the pole piece 1 to effectively fix the diaphragm 2.
  • the first adhesive layer 112 includes a stacked ceramic slurry layer 1121 and an adhesive glue layer 1122, the effect of bonding the separator 2 can be achieved without changing the original formula of the ceramic slurry layer 1121.
  • the adhesive glue includes polyvinylidene fluoride, polyvinylidene fluoride-hexafluoropropylene mixture, polyvinylidene fluoride-chlorotrifluoroethylene mixture, polytetrafluoroethylene, polymethylmethacrylate , at least one of polyacrylonitrile and polyethylene oxide.
  • the adhesive may include one, two, three or even more of the above materials, which is not limited in this application.
  • the adhesive glue includes polyvinylidene fluoride, or the adhesive glue includes polyvinylidene fluoride and a polyvinylidene fluoride-hexafluoropropylene mixture, or the adhesive glue includes polyvinylidene fluoride, polytetrafluoroethylene, polymethylmethacrylate Methyl acrylate, polyacrylonitrile and polyethylene oxide.
  • the adhesive material is made of high-adhesion glue, which reduces the production cost and ensures the adhesion of the first adhesive layer 112 .
  • the present application provides a pole piece 1 .
  • Figure 8 is a top view of a pole piece provided by some embodiments of the present application.
  • Figure 9 is a schematic cross-sectional view of a pole piece provided by some embodiments of the present application.
  • the pole piece 1 includes a current collector 11 and an active material layer 12 and the tab 13, and the current collector 11 is any current collector 11 in the above embodiments.
  • the first adhesive layer 112 of the current collector 11 is located between the active material layer 12 and the tab 13 , and between the active material layer 12 and the tab area 1112 .
  • the active material layer 12 is arranged in the active material area 1111 of the current collector 11; and the tab 13 is arranged in the tab area of the current collector 11.
  • the active material layer 12 is located in the active material area 1111.
  • the active material is a part of the battery constituting materials and directly affects the performance of the battery.
  • the active material layer 12 of the anode plate is composed of adhesive, conductive agent, anode material, etc.; the active material layer 12 of the cathode plate is composed of adhesive, graphite carbon powder, etc.
  • the liquid active material is coated on the current collector 11 , and after drying and solidifying, the active material becomes a solid active material, thereby bonding to the current collector 11 to form the active material layer 12 .
  • the tab 13 is a metal conductor that leads out the cathode and anode from the battery cell.
  • the anode of the battery is made of aluminum material
  • the cathode is made of nickel material
  • the cathode is also made of copper-nickel-plated material. They are made of film and The metal strip is composed of two parts.
  • FIG. 10 is a schematic diagram of the pole piece manufacturing process provided by some embodiments of the present application. As shown in FIG. 4 and FIG. 10 , when making the pole piece 1 , both sides of the current collector 11 have tab areas 1112 . After the active material layer 12 and the first adhesive layer 112 are formed on the current collector body 111 , It will be cut to form pole pieces.
  • cutting is performed along the cutting line B in FIG. 10 , thus forming a pole piece, so as to obtain multiple continuous pole pieces of a battery cell. Since both opposite ends of the pole piece have the first adhesive layer 112, and the first adhesive layer 112 is cut during cutting, it will not affect the active material layer 12 and reduce the occurrence of burrs or burrs on the pole piece 1. bump phenomenon and improve production yield. At the same time, the adhesive glue in the first adhesive layer 112 can ensure that the pole piece 1 can be effectively bonded to the diaphragm 2 .
  • the pole piece 1 provided by the embodiment of the present application can effectively fix the separator 2, avoid battery short circuit caused by the shrinkage of the separator 2, reduce the occurrence of burrs or bumps on the pole piece 1, and improve the production yield.
  • FIG. 11 is a top view of a separator provided by some embodiments of the present application
  • Figure 12 is a cross-sectional view of a separator provided by some embodiments of the present application.
  • the separator 2 includes a base material 21 and a second adhesive layer 22 .
  • the base material 21 has two first regions 211 and one second region 212. In the width direction C of the base material 21, the second region 212 is located between the two first regions 211; the second adhesive layer 22 is provided on The adhesive force of the second adhesive layer 22 on the two first areas 211 of the base material 21 on two opposite surfaces along the thickness direction of each first area 211 is greater than or equal to 1 N/m and less than or equal to 40 N/m.
  • the separator 2 refers to a layer of isolation material between the anode plate and the cathode plate. It is a very critical part of the battery and has a direct impact on the safety and cost of the battery. Its main function is to isolate the anode and cathode and make the electrons in the battery It cannot pass freely, allowing ions in the electrolyte to pass freely between the cathode and anode.
  • the base material 21 is used to support the second adhesive layer 22.
  • the base material 21 can be a single-layer polyethylene, a single-layer polypropylene, a double-layer polyethylene, a double-layer polypropylene, or a multi-layer polyethylene. Multiple layers of polypropylene or laminates of polyethylene and polypropylene.
  • the base material 21 can be made of other materials, which is not limited by this application.
  • the second adhesive layer 22 includes adhesive glue, thereby ensuring the adhesive force of the second adhesive layer 22 .
  • the adhesive glue includes polyvinylidene fluoride, polyvinylidene fluoride-hexafluoropropylene mixture, polyvinylidene fluoride-chlorotrifluoroethylene mixture, polytetrafluoroethylene, polymethylmethacrylate , at least one of polyacrylonitrile and polyethylene oxide.
  • the adhesive may include one, two, three or even more of the above materials, which is not limited in this application.
  • the pole piece 1 is laminated or curled.
  • the second adhesive layer 22 on the diaphragm 2 will be laminated, and both surfaces of the base material 21 have the second adhesive layer.
  • the separators 2 stacked together can be bonded together through their own second adhesive layer 22, thereby fixing the separator 2 and preventing the battery from short-circuiting due to shrinkage of the separator 2.
  • the adhesive force of the second adhesive layer 22 is greater than or equal to 1 N/m and less than or equal to 40 N/m, which ensures the adhesive force of the second adhesive layer 22 and prevents the separator 2 from coming off.
  • the adhesive force of the second adhesive layer 22 is greater than or equal to 5 N/m and less than or equal to 40 N/m.
  • the adhesive force of the second adhesive layer 22 is 5 N/m, or the adhesive force of the second adhesive layer 22 is 10 N/m, or the adhesive force of the second adhesive layer 22 is 20 N/m. , or the adhesive force of the second adhesive layer 22 is 30N/m, or the adhesive force of the second adhesive layer 22 is 40N/m.
  • the adhesive force of the second adhesive layer 22 can be other values, which is not limited by this application.
  • the adhesive force of the second adhesive layer 22 is further limited to ensure the adhesion between the second adhesive layers 22 and achieve effective fixation of the separator 2 .
  • the width L3 (L4) of the second adhesive layer 22 is less than or equal to 20 mm.
  • Limiting the width L3 (L4) of the second adhesive layer 22 to less than or equal to 20 mm not only ensures that the second adhesive layer 22 on the base material 21 can be used to fix the diaphragm 2, but also prevents the width of the second adhesive layer 22 from being too wide. , affecting the size of diaphragm 2.
  • the widths of the second adhesive layer 22 on both sides of the base material 21 are L3 and L4 respectively.
  • L3 and L4 may or may not be equal.
  • L3 is 5mm and L4 is 8mm; or both L3 and L4 are 9mm.
  • the width L3 (L4) of the second adhesive layer 22 is greater than or equal to 7 mm and less than or equal to 11 mm.
  • the width L3 (L4) of the second adhesive layer 22 is 7 mm, or the width L3 (L4) of the second adhesive layer 22 is 8 mm, or the width L3 (L4) of the second adhesive layer 22 is 9 mm. , or the width L3 (L4) of the second adhesive layer 22 is 10 mm, or the width L3 (L4) of the second adhesive layer 22 is 11 mm.
  • the width L3 (L4) of the second adhesive layer 22 can be other values, which is not limited by this application.
  • the width L3 (L4) of the second adhesive layer 22 is further limited to be greater than or equal to 7 mm and less than or equal to 11 mm, which not only ensures the fixing effect on the diaphragm 2, but also prevents the second adhesive layer 22 from being too wide, making the diaphragm 2 occupy less space.
  • the ratio is too large, thus affecting the energy density of the battery.
  • the separator 2 further includes a first insulating layer 23.
  • the first insulating layer 23 is disposed on two opposite surfaces of the second region 212 of the base material 21 along the thickness direction.
  • the first insulating layer 23 23 including adhesive glue and ceramic slurry.
  • the first insulating layer 23 is used to ensure the insulation of the separator 2 and prevent the cathode plate and the anode plate from being in direct contact and causing a short circuit in the battery.
  • Ceramic slurry is a commonly used insulating material with good insulation properties. The adhesive glue and ceramic slurry are mixed to ensure that the ceramic slurry can be bonded to the base material 21 .
  • the second adhesive layer 22 and the first insulating layer 23 are formed in the same layer.
  • the second adhesive layer 22 and the first insulating layer 23 are both made on the base material 21 through a microgravure roller.
  • the area corresponding to the rolling surface of the microgravure roller has the slurry to be coated.
  • the microgravure roller is on the base material. 21. Apply the slurry to the corresponding area after rolling.
  • adhesive glue can be placed in the area corresponding to the first area 211 on the rolling surface of the microgravure roller, and adhesive glue and The mixture of ceramic slurry is then rolled on the substrate 21 by a microgravure roller to form the second adhesive layer 22 and the first insulating layer 23 respectively.
  • the second adhesive layer 22 and the first insulating layer 23 are made in the same layer, which can reduce the number of manufacturing steps and improve work efficiency.
  • FIG. 13 is a cross-sectional view of a separator provided by some embodiments of the present application.
  • the separator 2 further includes a second insulating layer 24 , and the second insulating layer 24 is disposed on the base material 21 along the thickness. The two opposite surfaces in the direction completely cover the two surfaces of the base material 21. In the thickness direction of the base material 21, the second insulating layer 24 is located between the second adhesive layer 22 and the base material 21.
  • the second insulating layer 24 Includes adhesives and ceramic slurries.
  • the second adhesive layer 22 and the second insulating layer 24 can be made in layers. For example, a layer of the second insulating layer 24 is first made on the base material 21 , and then a layer of the second insulating layer 24 is made on the first area 211 of the base material 21 . Two adhesive layers 22.
  • the second insulating layer 24 is used to ensure the insulation of the separator 2 and prevent the cathode plate and the anode plate from being in direct contact and causing a short circuit in the battery.
  • Ceramic slurry is a commonly used insulating material with good insulation properties. The adhesive glue and ceramic slurry are mixed to ensure that the ceramic slurry can be bonded to the base material 21 .
  • the embodiment of the present application provides a battery cell, which includes the pole piece in the above embodiment and/or the separator in the above embodiment.
  • one of the cathode electrode piece and the anode electrode piece of the battery cell adopts the electrode piece in the above embodiment.
  • both the cathode pole piece and the anode pole piece of the battery cell can adopt the pole pieces in the above embodiments.
  • the separator 2 can be effectively fixed. After the separator 2 is heated, the separator 2 will not shrink, so that the separator 2 can separate the cathode pole piece and the anode pole piece, avoiding the cathode pole piece and the anode. Direct contact between the pole pieces causes a short circuit in the battery.
  • Figure 14 is a cross-sectional view of a pole piece provided by some embodiments of the present application. Referring to Figure 14, when the battery cell includes the above-mentioned pole piece 1, the first adhesive layer of the pole piece 1 112 is fixed with diaphragm 2.
  • the pole piece 1 and the separator 2 can be bonded through the first adhesive layer 112 to fix them together to fix the separator 2 .
  • the separator 2 will not shrink, so that the separator 2 can separate the cathode pole piece and the anode pole piece, and avoid the cathode pole piece and the anode pole piece. Direct contact causes the battery to short circuit.
  • Figure 15 is a cross-sectional view of a pole piece provided by some embodiments of the present application.
  • the cathode pole piece 14 and the anode pole piece 15 of the battery cell both adopt the pole pieces in the above embodiments.
  • the separator 2 is located between the cathode pole piece 14 and the anode pole piece 15, and the first adhesive layer 112 of the cathode pole piece 14 and the first adhesive layer 112 of the anode pole piece 15 are both fixed to the separator 2.
  • the first adhesive layer 112 of the cathode plate 14 and the first adhesive layer 112 of the anode plate 15 are both bonded to the separator 2 to increase the fixing effect on the separator 2 .
  • Figure 16 is a cross-sectional view of the cooperation between the pole piece and the separator provided in some embodiments of the present application.
  • the battery cell includes the separator 2 in the above embodiment, it is located on the same pole piece 1
  • the second adhesive layers 22 of the two diaphragms 2 on both sides are fixed together.
  • the second adhesive layer 22 on the separator 2 will be stacked, so that the stacked separators 2 can be bonded together through the second adhesive layer 22 to fix the separator 2. Avoid battery short circuit due to shrinkage of separator 2.
  • the second adhesive layer 22 fixed together is located on both sides of the active material layer 12 of the pole piece 1 in the width direction of the current collector 11 .
  • the second adhesive layer 22 is located on both sides of the active material layer 12 of the pole piece 1 to prevent the second adhesive layer 22 from affecting the active material layer 12 and thereby affecting the performance of the battery.
  • the embodiments of the present application provide a hot-pressing mold 3 for producing battery cells.
  • Figure 17 is a structural diagram of the hot-pressing mold provided by some embodiments of the present application.
  • Figure 18 is a hot-pressing mold provided by some embodiments of the present application.
  • Structural diagram from another perspective Figure 19 is a front view of the hot pressing mold provided by some embodiments of the present application, and
  • Figure 20 is a cross-sectional view of the C-C plane in Figure 19.
  • the hot pressing mold 3 includes a first clamping plate 31 and at least two first bumps 32 .
  • the at least two first bumps 32 are located on the same first surface of the first clamping plate 31 , and in the width direction of the first clamping plate 31 , a part of the at least two first bumps 32 is close to a certain part of the first surface. One side is provided, and the other part is provided close to the other side of the first surface, where one side and the other side are opposite sides of the first surface, so that at least two first protrusions are formed when making the battery cell.
  • the position of the block 32 corresponds to the position of the first adhesive layer 112 .
  • the first clamping plate 31 and the first bump 32 may be integrally formed, or the first bump 32 may be bonded to the first surface of the first clamping plate 31 .
  • the hot-pressing mold 3 includes two first bumps 32 , and the two first bumps 32 are located on opposite sides of the first surface, so that the structure of the hot-pressing mold 3 is simpler.
  • the hot pressing mold 3 may include a plurality of first bumps 32 , and the first bumps 32 located on the same side of the first surface are arranged along the length direction of the first clamping plate 31 .
  • the positions of at least two first bumps 32 correspond to the positions of the first adhesive layer 112 , and the at least two first bumps 32 are To bond the first adhesive layer 112 and the diaphragm 2 together.
  • Pressure can be applied to the diaphragm 2 and the pole piece 1 through the first bump 32 on the first clamping plate 31.
  • the first adhesive layer 112 and the second adhesive layer 22 on the diaphragm 2 are thermally combined and bonded. together to prevent diaphragm 2 from shrinking at high temperatures.
  • the hot pressing mold 3 also includes a second clamping plate 33 and at least two second protrusions 34.
  • the second clamping plate 33 is opposite to the first clamping plate 31; the at least two second protrusions 34 are located on the second plying plate 33.
  • the same second surface of the clamping plate 33 has a one-to-one correspondence with the positions of the at least two second bumps 34 and the positions of the at least two first bumps 32 .
  • the second clamping plate 33 and the second protrusion 34 can be integrally formed, or the second protrusion 34 can be bonded to the second surface of the second plying plate 33 .
  • the hot-pressing mold 3 includes two second bumps 34 , and the two second bumps 34 are located on opposite sides of the second surface, so that the structure of the hot-pressing mold 3 is simpler.
  • the hot pressing mold 3 may include a plurality of second bumps 34 , and the second bumps 34 located on the same side of the second surface are arranged along the length direction of the second clamping plate 33 .
  • the first bump 32 and the second bump 34 on the hot pressing mold 3 simultaneously exert pressure on the separator 2 and the pole piece 1. Under the action of heat, the first adhesive layer 112 and the second adhesive layer 22 on the diaphragm 2 are thermally combined and bonded together to prevent the diaphragm 2 from shrinking at high temperatures.
  • the positions of at least two first bumps 32 correspond to the positions of the second adhesive layer 22 , and the at least two first bumps 32 are The second adhesive layer 22 of the diaphragm 2 is bonded together to prevent the diaphragm 2 from shrinking at high temperature.
  • Embodiments of the present application provide a battery, including at least two battery cells in any embodiment.
  • Batteries can be used in, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, battery cars, electric vehicles, ships, spacecraft, etc.
  • electric toys can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, electric airplane toys, etc.
  • spacecraft can include airplanes, rockets, space shuttles, spaceships, etc.
  • the battery cells By using the battery cells in the embodiments of the present disclosure, it can be ensured that the battery 100 is not prone to short circuit and has high safety.
  • Embodiments of the present application provide an electrical device.
  • the electrical device includes a battery in any embodiment, and the battery is used to provide electrical energy.
  • Electric devices can be, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, battery cars, electric vehicles, ships, spacecraft, etc.
  • electric toys can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, electric airplane toys, etc.
  • spacecraft can include airplanes, rockets, space shuttles, spaceships, etc.
  • the present application provides a pole piece 1.
  • the pole piece 1 includes a current collector 11, a first adhesive layer 112, an active material layer 12 and a pole tab 13.
  • the current collector 11 includes a current collector body 111.
  • the current collector body 111 has an active material area 1111, a tab area 1112 and a glue coating area 1113.
  • the tab area 1112 is located on one side of the active material area 1111, and the glue application area 1113 is located in the active material area.
  • the first adhesive layer 112 is provided in the glue coating area 1113, and the adhesive force of the first adhesive layer 112 is greater than or Equal to 5N/m and less than or equal to 40N/m.
  • the width of the first adhesive layer 112 is greater than or equal to 7 mm and less than or equal to 11 mm.
  • the first adhesive layer 112 includes adhesive glue, and the ratio of the mass of the adhesive glue to the total mass of the first adhesive layer 112 is greater than or equal to 10% and less than or equal to 50%.
  • the first adhesive layer 112 includes a stacked ceramic slurry layer 1121 and an adhesive layer 1122 .
  • the ceramic slurry layer 1121 is located between the current collector body 111 and the adhesive layer 1122 .
  • the active material layer 12 is disposed in the active material region 1111 of the current collector.
  • the tab 13 is disposed in the tab area 1112 of the current collector. The first adhesive layer 112 of the pole piece 1 and the diaphragm 2 are fixed together.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Secondary Cells (AREA)

Abstract

La présente invention concerne un séparateur, un élément de batterie, un moule de pressage à chaud, une batterie et un dispositif électrique. La présente demande appartient au domaine technique des batteries. Le séparateur comprend un substrat et des secondes couches de liaison. Le substrat présente deux premières régions et une seconde région ; dans la direction de la largeur du substrat, la seconde région est située entre les deux premières régions ; les secondes couches de liaison sont disposées sur deux surfaces opposées, dans une direction d'épaisseur, de l'une ou l'autre des deux premières régions du substrat ; et la force de liaison des secondes couches de liaison est supérieure ou égale à 1 N/m et inférieure ou égale à 40 N/m. Les secondes couches de liaison sont disposées sur le séparateur ; après que des plaques d'électrode sont complètement fabriquées, les plaques d'électrode sont empilées ou incurvées, et ainsi les secondes couches de liaison sur le séparateur sont empilées ; et les deux surfaces du substrat sont pourvues des secondes couches de liaison, de telle sorte que des séparateurs empilés ensemble peuvent être liés ensemble au moyen de leurs propres secondes couches de liaison, de façon à fixer les séparateurs, ce qui évite ainsi un court-circuit de batterie provoqué par le retrait des séparateurs.
PCT/CN2022/118487 2022-07-19 2022-09-13 Séparateur, élément de batterie, moule de pressage à chaud, batterie et dispositif électrique WO2024016452A1 (fr)

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CN202221853206.5 2022-07-19
CN202221853206.5U CN217589312U (zh) 2022-07-19 2022-07-19 隔膜、电池单体、热压模具、电池和用电装置

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Citations (6)

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Publication number Priority date Publication date Assignee Title
CN108232092A (zh) * 2017-12-26 2018-06-29 惠州Tcl金能电池有限公司 隔膜、锂离子电池及其制造方法
CN111162323A (zh) * 2019-12-30 2020-05-15 东莞维科电池有限公司 一种卷绕式锂离子电芯及其制备方法
CN111564593A (zh) * 2020-06-04 2020-08-21 江苏星源新材料科技有限公司 隔膜、隔膜卷、电芯以及动力锂电池
CN211404608U (zh) * 2019-11-29 2020-09-01 无锡恩捷新材料科技有限公司 一种耐热粘结性低成本的涂布膜
CN114597590A (zh) * 2022-03-14 2022-06-07 华鼎国联四川动力电池有限公司 一种涂边特种隔膜及其应用
CN114725623A (zh) * 2020-12-22 2022-07-08 华为技术有限公司 电池、电子设备、移动装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108232092A (zh) * 2017-12-26 2018-06-29 惠州Tcl金能电池有限公司 隔膜、锂离子电池及其制造方法
CN211404608U (zh) * 2019-11-29 2020-09-01 无锡恩捷新材料科技有限公司 一种耐热粘结性低成本的涂布膜
CN111162323A (zh) * 2019-12-30 2020-05-15 东莞维科电池有限公司 一种卷绕式锂离子电芯及其制备方法
CN111564593A (zh) * 2020-06-04 2020-08-21 江苏星源新材料科技有限公司 隔膜、隔膜卷、电芯以及动力锂电池
CN114725623A (zh) * 2020-12-22 2022-07-08 华为技术有限公司 电池、电子设备、移动装置
CN114597590A (zh) * 2022-03-14 2022-06-07 华鼎国联四川动力电池有限公司 一种涂边特种隔膜及其应用

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