WO2023050348A1 - 一种电池单体、电池、用电装置、电池单体的制造方法、设备 - Google Patents
一种电池单体、电池、用电装置、电池单体的制造方法、设备 Download PDFInfo
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- WO2023050348A1 WO2023050348A1 PCT/CN2021/122281 CN2021122281W WO2023050348A1 WO 2023050348 A1 WO2023050348 A1 WO 2023050348A1 CN 2021122281 W CN2021122281 W CN 2021122281W WO 2023050348 A1 WO2023050348 A1 WO 2023050348A1
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- WIPO (PCT)
- Prior art keywords
- protective film
- hole
- battery cell
- electrode assembly
- hook
- Prior art date
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- 229910052742 iron Inorganic materials 0.000 description 2
- 229910000625 lithium cobalt oxide Inorganic materials 0.000 description 2
- BFZPBUKRYWOWDV-UHFFFAOYSA-N lithium;oxido(oxo)cobalt Chemical compound [Li+].[O-][Co]=O BFZPBUKRYWOWDV-UHFFFAOYSA-N 0.000 description 2
- 229910052987 metal hydride Inorganic materials 0.000 description 2
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Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4235—Safety or regulating additives or arrangements in electrodes, separators or electrolyte
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
- H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
-
- 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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
-
- 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
- H01M50/147—Lids or covers
- H01M50/148—Lids or covers characterised by their shape
- H01M50/15—Lids or covers characterised by their shape for prismatic 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
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/46—Separators, membranes or diaphragms characterised by their combination with electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
- H01M50/586—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries inside the batteries, e.g. incorrect connections of electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
- H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
- H01M50/591—Covers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
- H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
- H01M50/593—Spacers; Insulating plates
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/30—Batteries in portable systems, e.g. mobile phone, laptop
-
- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Definitions
- the present application relates to the field of batteries, and in particular to a battery cell, a battery, an electrical device, a method for manufacturing a battery cell, and a cell manufacturing device.
- Chemical battery, electrochemical battery, electrochemical battery or electrochemical cell refers to a type of device that converts the chemical energy of positive and negative active materials into electrical energy through redox reactions.
- the difference from ordinary redox reactions is that the oxidation and reduction reactions are carried out separately, the oxidation is at the negative electrode, the reduction is at the positive electrode, and the gain and loss of electrons are carried out through the external circuit, so a current is formed.
- This is an essential characteristic of all batteries.
- chemical batteries After long-term research and development, chemical batteries have ushered in a variety of varieties and a wide range of applications. Huge installations as large as a building can fit, and types as small as millimeters. The development of modern electronic technology puts high demands on chemical batteries. Every breakthrough in chemical battery technology has brought about revolutionary developments in electronic equipment. Many electrochemical scientists in the world have focused their research and development interests on the field of chemical batteries used as power for electric vehicles.
- lithium-ion battery As a kind of chemical battery, lithium-ion battery has the advantages of small size, high energy density, high power density, many cycle times and long storage time. It has been used in some electronic equipment, electric vehicles, electric toys and electric equipment. Widely used, for example, lithium-ion batteries are currently widely used in mobile phones, notebook computers, battery cars, electric vehicles, electric aircraft, electric ships, electric toy cars, electric toy ships, electric toy planes and electric tools, etc.
- the application of lithium-ion batteries includes three levels: battery cells, battery modules and battery packs. With the continuous development of lithium-ion battery technology, higher requirements are put forward for the performance of lithium-ion batteries. It is hoped that lithium-ion batteries can consider various design factors at the same time.
- the combination method is the hot melt method. Affected by factors such as temperature, pressure, and protective film material, it is easy to cause problems such as over-melting wire drawing and unmelted shedding of the protective film, so that the protective film cannot protect the electrode assembly. Over-melting wire drawing It is easy to cause the defect of the welding explosion point of the end cover.
- This application proposes a battery cell, battery, electrical device, and battery cell manufacturing method and equipment.
- a battery cell including:
- the protective film is used to be sleeved on the outer periphery of the electrode assembly, and the protective film is engaged with the insulator.
- the clamping connection between the protective film and the insulating part is more reliable, which can avoid the phenomenon that the protective film falls off due to poor thermal fusion of the protective film and the insulating part, and then the relative relationship between the protective film and the electrode assembly remains unchanged for a long time, improving The protective performance of the electrode assembly is improved, thereby improving the safety of the battery; on the other hand, the clip connection between the protective film and the insulator saves time and effort in the assembly process and speeds up the production efficiency of the battery.
- the insulator is provided with a hook
- the protective film is provided with a hole corresponding to the hook
- the protective film and the insulating member are engaged with the hook through the hole.
- the clamping structure of the protective film and the insulating part can be designed in various types, and the matching structure of the hook and the hole is adopted, which is not only convenient for design and manufacture, but also convenient for the clamping combination of the protective film and the insulating part, and after the clamping, the protective film and the insulating part It is not easy to separate, which ensures the firmness after the protective film and the insulating part are clamped.
- the insulating member has an outer surface facing the inner wall of the casing, and the hook is disposed on the outer surface.
- the protective film is sleeved on the outer periphery of the electrode assembly, and the hook is set on the outer surface of the insulator, the protective film can be clamped with the insulator after being folded, and the clamping process can be realized quickly without too much adjustment. This makes the process of clamping the protective film and the insulating part easier.
- the outer surface is provided with a groove, and the hook is disposed in the groove.
- the energy density of the battery is a quality standard that the battery manufacturing process always pursues. For this reason, on the one hand, it is necessary to reduce the volume of the battery, and on the other hand, it is necessary to improve the utilization rate of the internal space of the battery. By setting the hook in the groove, it can Occupying the space of the containing cavity is reduced, avoiding the excessively large volume of the shell and not effectively utilizing it, and contributing to improving the energy density of the battery.
- the distance between the outer surface and the corresponding inner wall is J
- the distance between the surface of the hook facing the housing and the corresponding inner wall is K
- J ⁇ K the distance between the surface of the hook facing the housing and the corresponding inner wall
- the insulator, electrode assembly, and protective film need to be loaded into the casing at the same time.
- the hook does not protrude from the outer surface of the insulator, which is beneficial to the insulation of the insulator. Entering into the casing, it is convenient to assemble the battery cells.
- the groove along the thickness direction of the end cap, the groove has a first surface and a second surface oppositely disposed, and the second surface is farther away from the end cap than the first surface, so The hook is arranged on the second surface.
- the hooks can be arranged in different positions in the groove according to actual needs, so as to meet the usage requirements of different types of batteries.
- a higher degree of firmness can be obtained after the protective film is engaged with the insulator.
- the first surface is provided with a blocking portion extending toward the second surface, the blocking portion is spaced apart from the hook, and along the concave direction of the groove, the blocking portion and The protective films are overlapped.
- the gap between the blocking part and the hook is small, and after the protective film is engaged with the insulator, the blocking part forms a limiting structure for the protective film, and the combination with the hook can effectively prevent the protective film from detaching from the hook.
- the groove has a third surface connecting the first surface and the second surface, and the end of the blocking portion toward the second surface extends toward the third surface to form a fold. Bend.
- the bending part can play two functions.
- the bending part forms a guiding structure, which facilitates the edge of the protective film to enter the hook. After the protective film is clamped with the insulating part, it can further Effectively prevent the protective film from detaching from the hook.
- the insulator has a boss protruding toward the electrode assembly, the boss is used to abut against the electrode assembly, and the hook is disposed on the boss.
- the boss is equivalent to increasing the thickness of the insulating part, so there is a large design space on the boss, and the structure of the boss can be reasonably used to design hooks of different structures according to needs.
- the boss along the length direction of the end cover, the boss has two end surfaces, and the groove runs through the two end surfaces.
- the groove As an open structure at both ends, after the protective film and the insulating part are clamped, the protective film and the insulating part are attached, and the protective film does not wrinkle at the clamping part, and the protective film remains flat.
- the height of the part of the protection film located in the groove is H
- the height of the groove is I
- the protective film By limiting the height of the part of the protective film in the groove, after the protective film and the insulating part are clamped, the protective film and the insulating part are attached, the protective film will not wrinkle at the clamping part, and the protective film remains flat .
- the protection film includes two first protection parts disposed opposite to each other along the thickness direction of the electrode assembly and two second protection parts disposed opposite to each other along the length direction of the end cap, the end caps
- the thickness direction of the cover, the thickness direction of the electrode assembly and the length direction of the end cap are perpendicular to each other;
- Each of the second protection parts is provided with an extension part, and the extension part extends to a side of the first protection part away from the electrode assembly, and the hole includes a first hole provided on the first protection part and a second hole provided on the extension part, the second hole partially overlaps with the first hole, so that the second hole and the first hole are engaged with the same hook, or,
- Each of the first protection part is provided with an extension part, and the extension part extends to the side of the second protection part away from the electrode assembly, and the hole includes a first hole provided on the second protection part And a second hole disposed on the extension part, the second hole partially overlaps with the first hole, so that the second hole and the first hole are engaged with the same hook.
- the two first protection parts and the two second protection parts can be combined and connected by means of the hook extension part, so that the various parts of the protective film are combined to form a whole, which is not easy to be separated, and at the same time, the protective film and insulation are strengthened reliability of the connection.
- the insulating member is provided with a hole
- the protective film is provided with a boss corresponding to the hole, and the protective film and the insulating member are snapped together through the boss and the hole.
- the clamping structure of the protective film and the insulating part can be designed in various types.
- the matching structure of the boss and the hole is also convenient for the clamping combination of the protective film and the insulating part. After the protective film is folded, it can be clamped with the insulating part, and the clamping process is fast. Realization, no need to make too many adjustments, making the process of clamping the protective film and the insulating part easier.
- a connecting portion is provided between the boss and the inner wall of the protective film, the hole includes a first section and a second section, and the second section is arranged at a distance from the first section to the On one side of the end cap, at least part of the connecting portion is disposed in the second section, and the boss forms an interference fit relationship with the first section to restrict the boss from detaching from the first section.
- the boss By forming an interference fit relationship between the boss and the first section, after the boss enters the hole, the boss can be prevented from easily detaching from the hole, which ensures the firmness of the protective film and the insulator after clamping.
- a battery including the battery cell described in any one of the above items.
- an electric device comprising the battery cell described in any one of the above, and the battery cell is used to provide electric energy.
- a method for manufacturing a battery cell including:
- a housing is provided, and the end cap is connected with the housing to form a housing cavity for housing the electrode assembly.
- a battery cell manufacturing equipment including:
- An assembly module is used to isolate the end cap from the electrode assembly by the insulating member, the protective film is sleeved on the outer periphery of the electrode assembly, and the protective film is clamped to the insulating member, and the The end cap is connected with the casing to form a housing cavity for housing the electrode assembly.
- Figure 1 shows a schematic structural view of some embodiments of a vehicle using a battery cell of the present application
- Fig. 2 shows a schematic structural view of some embodiments of a battery using a battery cell of the present application
- Fig. 3 shows a schematic perspective view of an exploded state of a battery cell according to some embodiments of the present application
- Fig. 4 shows a schematic perspective view of a battery cell according to some embodiments of the present application
- Fig. 5 shows a schematic perspective view of an insulator according to some embodiments of the present application
- Figure 6 shows an enlarged view of part B in Figure 5;
- Fig. 7 shows a schematic perspective view of a folded state of a protective film according to some embodiments of the present application
- Fig. 8 shows a schematic cross-sectional view of a hook according to some embodiments of the present application
- Fig. 9 shows a schematic cross-sectional view of a hook according to some embodiments of the present application.
- Fig. 10 shows a schematic cross-sectional view of a hook according to some embodiments of the present application
- Fig. 11 shows a schematic cross-sectional view of a hook according to some embodiments of the present application
- Figure 12 shows an enlarged view of part A in Figure 4.
- Fig. 13 shows a schematic cross-sectional view of a hook according to some embodiments of the present application
- Fig. 14 shows a schematic front view of a protective film in an unfolded state according to some embodiments of the present application
- Fig. 15 shows a schematic front view of the unfolded state of the protective film according to some embodiments of the present application
- Fig. 16 shows a schematic perspective view of a battery cell according to some embodiments of the present application.
- Figure 17 shows a schematic perspective view of an insulator according to some embodiments of the present application.
- Fig. 18 shows a schematic perspective view of a folded state of a protective film according to some embodiments of the present application
- Fig. 19 shows a schematic perspective view of a battery cell according to some embodiments of the present application.
- Figure 20 shows a schematic perspective view of an insulator according to some embodiments of the present application.
- Fig. 21 shows a schematic perspective view of a folded state of a protective film according to some embodiments of the present application
- Figure 22 shows a schematic front view of a battery cell according to some embodiments of the present application.
- Figure 23 shows a sectional view along C-C in Figure 22;
- Figure 24 shows an enlarged view of part D in Figure 23;
- Figure 25 shows a schematic perspective view of holes and bosses according to some embodiments of the present application
- Fig. 26 shows a schematic flowchart of a method for manufacturing a battery cell according to some embodiments of the present application
- Fig. 27 shows a schematic structural diagram of a manufacturing device for a battery cell according to some embodiments of the present application.
- first, second and the like in the description and claims of the present application or the above drawings are used to distinguish different objects, rather than to describe a specific sequence or primary-subordinate relationship.
- first and second are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features.
- a feature defined as “first” and “second” may explicitly or implicitly include one or more of these features.
- plural means two or more.
- connection In the description of this application, it should be noted that, unless otherwise clearly stipulated and limited, the terms “installation”, “connection”, “connection” and “attachment” should be understood in a broad sense, for example, it may be a fixed connection, It can also be detachably connected or integrally connected; it can be directly connected or indirectly connected through an intermediary, and it can be internal communication between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application according to specific situations.
- a battery refers to a single physical module comprising one or more battery cells to provide higher voltage and capacity.
- the battery mentioned in this application may include a battery module or a battery pack, and the like.
- Rechargeable batteries are also called secondary batteries (Secondary Battery) or secondary batteries, storage batteries.
- Secondary Battery Secondary Battery
- the manufacturing materials and process of rechargeable batteries are different from those of disposable batteries. Its advantage is that it can be used repeatedly after charging, and the output current load capacity of rechargeable batteries is higher than that of most disposable batteries.
- the common types of rechargeable batteries are: lead-acid batteries, nickel metal hydride batteries and lithium-ion batteries.
- Lithium-ion batteries have the advantages of light weight, large capacity (capacity is 1.5 times to 2 times that of nickel-metal hydride batteries of the same weight), no memory effect, etc., and have a very low self-discharge rate, so even if the price is relatively high, you can still get general application.
- Lithium-ion batteries are also used in pure electric vehicles and hybrid vehicles. Lithium-ion batteries used for this purpose have relatively low capacity, but have larger output, charging current, and some have longer life, but the cost is higher .
- Lithium-ion batteries (referring to: battery cells) mainly rely on lithium ions to move between the positive pole and the negative pole to work.
- Li-ion batteries use an intercalated lithium compound as an electrode material.
- the main positive electrode materials used for lithium-ion batteries are: lithium cobalt oxide (LiCoO2), lithium manganate (LiMn2O4), lithium nickelate (LiNiO2) and lithium iron phosphate (LiFePO4).
- a separator is arranged between the positive pole piece and the negative pole piece to form a thin film structure with three layers of materials.
- the film structure is usually wound or stacked to form an electrode assembly of a desired shape. For example, a thin-film structure of three layers of material in a cylindrical battery is wound into a cylindrical-shaped electrode assembly, while a thin-film structure in a prismatic battery is wound or stacked into an electrode assembly having a roughly rectangular parallelepiped shape.
- a plurality of battery cells may be connected in series and/or in parallel via electrode terminals for various applications.
- the application of battery cells includes three levels: battery cells, battery modules and battery packs.
- the batteries mentioned in this application include battery modules or battery packs.
- a battery module is formed by electrically connecting a certain number of batteries together and putting them in a frame in order to protect the batteries from external shock, heat, vibration, etc.
- the battery pack is the final state of the battery system that goes into an electric vehicle.
- Most of the current battery packs are made by assembling various control and protection systems such as battery management system (BMS) and thermal management components on one or more battery modules.
- BMS battery management system
- thermal management components With the development of technology, the level of the battery module can be omitted, that is, a battery is directly formed from a plurality of battery cells. This improvement has improved the gravimetric energy density and volumetric energy density of the battery while significantly reducing the number of components.
- the protective film (mylar) inside the battery cell is combined with the insulator by hot-melt connection, which is prone to problems such as over-melting wire drawing and unmelted falling off of the protective film, and over-melting wire drawing will lead to welding of the end cap and the shell Explosion point, unmelted falling off will cause the protective film to fail to protect the electrode assembly.
- This application does not need to use hot-melt bonding in the assembly process by setting the protective film and the insulator to clamp, avoiding the hot-melt connection.
- the protective film is over-melted and drawn, and it is not melted and falls off.
- the batteries disclosed in the embodiments of the present application can be used, but not limited to, in electric devices such as vehicles, ships or aircrafts.
- the power supply system composed of the battery cells and batteries disclosed in this application can be used to form the power consumption device, which is beneficial to improve battery performance and battery life.
- the embodiment of the present application provides an electric device using a battery as a power source.
- the electric device can be, but not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, and the like.
- electric toys can include fixed or mobile electric toys, such as game consoles, electric car toys, electric boat toys, electric airplane toys, etc.
- spacecraft can include airplanes, rockets, space shuttles, spaceships, etc.
- a vehicle 6 is taken as an example of an electric device in an embodiment of the present application.
- FIG. 1 is a schematic structural diagram of a vehicle 6 provided by some embodiments of the present application.
- the vehicle 6 can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle.
- the interior of the vehicle 6 is provided with a battery 7 , and the battery 7 may be provided at the bottom, head or tail of the vehicle 6 .
- the battery 7 can be used for power supply of the vehicle 6 , for example, the battery 7 can be used as an operating power source of the vehicle 6 .
- the vehicle 6 may further include a controller 8 and a motor 9 , the controller 8 is used to control the battery 7 to supply power to the motor 9 , for example, for the starting, navigation and working power requirements of the vehicle 6 during driving.
- the battery 7 can not only be used as an operating power source for the vehicle 6 , but can also be used as a driving power source for the vehicle 6 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 6 .
- FIG. 2 is a schematic explosion diagram of a battery 7 provided by some embodiments of the present application.
- the battery 7 includes a case 11 and a battery cell 10 accommodated in the case 11 .
- the box body 11 is used to provide an accommodation space for the battery cell 10 , and the box body 11 can adopt various structures.
- the case body 11 may include an upper cover 1101 and a lower case body 1102, the upper cover 1101 and the lower case body 1102 cover each other, and the upper cover 1101 and the lower case body 1102 jointly define an of accommodation space.
- the lower box 1102 can be a hollow structure with one end open, and the upper cover 1101 can be a plate-shaped structure.
- the upper cover 1101 covers the opening side of the lower box 1102, so that the upper cover 1101 and the lower box 1102 jointly define an accommodation space.
- the upper cover 1101 and the lower box 1102 can also be hollow structures with one side opening, and the opening side of the upper cover 1101 is closed to the opening side of the lower box 1102 .
- the box body 11 formed by the upper cover 1101 and the lower box body 1102 may be in various shapes, such as a cylinder, a cuboid, and the like.
- the battery 7 there may be multiple battery cells 10 , and the multiple battery cells 10 may be connected in series, parallel or mixed.
- the mixed connection means that the multiple battery cells 10 are both connected in series and in parallel.
- a plurality of battery cells 10 can be directly connected in series, in parallel or mixed together, and then the whole of the plurality of battery cells 10 is accommodated in the box 11; of course, the battery 7 can also be a plurality of battery cells 10
- the battery modules are firstly connected in series, parallel or mixed, and then multiple battery modules are connected in series, parallel or mixed to form a whole, and accommodated in the box 11 .
- the battery 7 may also include other structures, for example, the battery 7 may also include a bus component (not shown in the figure), which is used to realize the electrical connection between a plurality of battery cells 10.
- each battery cell 10 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 not limited thereto.
- the battery cell 10 may be in the form of a cylinder, a flat body, a cuboid or other shapes.
- FIG. 3 is a schematic explosion diagram of a battery cell 10 provided by some embodiments of the present application.
- the battery cell 10 refers to the smallest unit constituting the battery 7 .
- the battery cell 10 includes an end cap 1 , an electrode assembly 3 , a casing 5 and other functional components.
- the end cap 1 refers to a component that covers the opening of the casing 5 to isolate the internal environment of the battery cell 10 from the external environment.
- the shape of the end cap 1 can be adapted to the shape of the housing 5 to fit the housing 5 .
- the end cover 1 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the end cover 1 is not easily deformed when it is squeezed and collided, so that the battery cell 10 can have a higher Structural strength and safety performance can also be improved.
- Functional components such as electrode terminals may be provided on the end cap 1 . The electrode terminals can be used for electrical connection with the electrode assembly 3 for outputting or inputting electric energy of the battery cell 10 .
- the material of the end cap 1 can also be various, for example, copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not particularly limited in this embodiment of the present application.
- an insulator 2 can be provided inside the end cover 1 , and the insulator 2 can be used to isolate the electrical connection components in the housing 5 from the end cover 1 to reduce the risk of short circuit.
- the insulating member 2 may be plastic, rubber or the like.
- an interface for monitoring the inside of the cell is also provided on the end cap 1 , and the internal condition of the cell is monitored through the monitoring interface.
- the casing 5 is a component used to cooperate with the end cap 1 to form the internal environment of the battery cell 10 , wherein the formed internal environment can be used to accommodate the electrode assembly 3 , electrolyte and other components.
- the housing 5 and the end cover 1 can be independent components, and an opening can be provided on the housing 5 , and the internal environment of the battery cell 10 can be formed by covering the opening with the end cover 1 .
- the end cover 1 and the housing 5 can also be integrated. Specifically, the end cover 1 and the housing 5 can form a common connection surface before other components are inserted into the housing. When the inside of the housing 5 needs to be encapsulated , then make the end cover 1 cover the housing 5.
- the housing 5 can be in various shapes and sizes, such as cuboid, cylinder, hexagonal prism and so on. Specifically, the shape of the casing 5 can be determined according to the specific shape and size of the electrode assembly 3 .
- the housing 5 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not particularly limited in this embodiment of the present application.
- the electrode assembly 3 is a component in the battery cell 10 that is soaked in the electrolyte solution to undergo an electrochemical reaction.
- the casing 5 may contain one or more electrode assemblies 3 .
- the electrode assembly 3 is mainly formed by winding or laminating a positive electrode sheet and a negative electrode sheet, and a separator is usually provided between the positive electrode sheet and the negative electrode sheet.
- the parts of the positive electrode sheet and the negative electrode sheet with the active material constitute the main body of the electrode assembly 3 , and the parts of the positive electrode sheet and the negative electrode sheet without the active material respectively constitute tabs.
- the positive pole tab and the negative pole tab can be located at one end of the main body together or at two ends of the main body respectively.
- a battery cell 10 including: an end cap 1 and a casing 5, the end cap 1 and the casing 5 form an accommodation chamber; the electrode assembly 3 is housed in In the housing cavity: the insulator 2 is used to isolate the end cap 1 and the electrode assembly 3 , and the protective film 4 is used to be sleeved on the outer periphery of the electrode assembly 3 , and the protective film 4 is clamped with the insulator 2 .
- the protective film 4 and the insulator 2 By arranging the protective film 4 and the insulator 2 to be clamped, it is not necessary to use the hot-melt bonding method during the assembly process. On the one hand, it avoids the wire drawing phenomenon caused by the hot-melt connection, and avoids the wire drawing caused by the hot-melt from affecting the end cover 1 and the shell. Welding quality between 5.
- the snap connection between the protective film 4 and the insulator 2 is more reliable, which can avoid the phenomenon that the protective film 4 falls off due to poor thermal fusion of the protective film 4 and the insulator 2, and the relative relationship between the protective film 4 and the electrode assembly 3 Keeping unchanged for a long time improves the protection performance of the electrode assembly 3, thereby improving battery safety; on the other hand, the clip connection between the protective film 4 and the insulator 2 saves time and effort in the assembly process and speeds up battery production efficiency.
- the battery cell in this embodiment can be in the shape of a cuboid or a cube, and the shape of a cuboid is shown in the drawings.
- the protective film 4 is generally called mylar in the technical field, which is a polyester film.
- the insulator 2 is provided with a hook 203
- the protective film 4 is provided with a hole 408 corresponding to the hook 203
- the protective film 4 and the insulator 2 pass through the hole 408 and The hook 203 is snapped in.
- a plurality of hooks 203 are arranged on the insulating member 2 , and a plurality of holes 408 are arranged on the protective film 4 corresponding to the hooks 203 .
- the insulator 2 is provided with 6 hooks 203 on both sides along the length direction X (X-axis direction in FIG. 5 ) of the end cover 1
- the protective film 4 is provided with 6 holes 408 . According to the different structures of the battery cells, the number of hooks 203 and holes 408 can be increased or decreased.
- the clamping structure of the protective film 4 and the insulating part 2 can be designed in various types, and the matching structure of the hook 203 and the hole 408 is adopted, which is not only convenient for design and manufacture, but also convenient for the clamping combination of the protective film 4 and the insulating part 2, and the clamping Afterwards, the protective film 4 and the insulating member 2 are not easily separated, which ensures the firmness of the protective film 4 and the insulating member 2 after they are snapped together.
- the insulator 2 has a boss 202 protruding toward the electrode assembly 3 , the boss 202 is used to abut against the electrode assembly 3 , and the hook 203 is disposed on the boss 202 .
- the insulator 2 is provided with three bosses 202. According to the structure of the battery cell, the number of bosses 202 can be increased or decreased.
- the interior of the bosses 202 is a hollow structure, which can reduce the The weight of the insulation 2.
- the boss 202 is equivalent to increasing the thickness of the insulator 2, so there is a large design space on the boss 202, and the structure of the boss 202 can be reasonably used to design hooks 203 with different structures according to needs.
- the length of the hole 408 is G
- the length of the hook 203 is F
- F ⁇ G can reserve a movable margin for the hooks 203 in the holes 408 to ensure that each hole 408 can enter the hooks 203 .
- the insulator 2 has an outer surface 2011 facing the inner wall of the housing 5 , and the hook 203 is disposed on the outer surface 2011 .
- each part of the protective film 4 is gradually approaching the outer surface 2011 of the insulator 2 during the folding process, and the hook 203 is arranged on the outer surface 2011 of the insulator 2, After the protective film 4 is folded, it can be clamped with the insulating part 2, and the clamping process can be realized quickly without too many adjustments, so that the process of clamping the protective film 4 and the insulating part 2 is relatively easy.
- a groove 2016 is disposed on the outer surface 2011 , and the hook 203 is disposed in the groove 2016 .
- the groove 2016 is formed by indenting the outer surface 2011 , and the inner space of the groove 2016 can be used for setting the hook 203 .
- the energy density of the battery is a quality standard that the battery manufacturing process always pursues. Therefore, on the one hand, it is necessary to reduce the volume of the battery, and on the other hand, it is necessary to improve the utilization rate of the internal space of the battery.
- By setting the hook 203 in the groove 2016 can reduce the occupied space of the receiving chamber, avoid causing the shell 5 to be too large and not be effectively utilized, and contribute to improving the energy density of the battery.
- the distance between the outer surface 2011 and the corresponding inner wall is J
- the distance between the surface of the hook 203 facing the housing 5 and the corresponding inner wall is K
- J ⁇ K the distance between the surface of the hook 203 facing the housing 5 and the corresponding inner wall
- the insulator 2, the electrode assembly 3, and the protective film 4 need to be loaded into the casing 5 at the same time.
- the hook 203 does not protrude from the insulator.
- the outer surface 2011 of the 2 facilitates the insulator 2 to enter the casing 5, and facilitates the assembly of the battery cells.
- the height of the part of the protection film 4 located in the groove 2016 is H
- the height of the groove 2016 is I
- H ⁇ I is H
- the protective film 4 and the insulating member 2 are bonded, and the protective film 4 will not wrinkle at the clamping place , the protective film 4 remains flat.
- the groove 2016 has a first surface 2012 and a second surface 2014 oppositely disposed, and the second surface 2014
- the hook 203 is disposed on the second surface 2014 farther away from the end cover 1 than the first surface 2012 .
- the hook 203 can be arranged at different positions in the groove 2016 according to actual needs, so as to meet the usage requirements of different types of batteries.
- the hook 203 is disposed on the second surface 2014 , and after the protective film 4 and the insulating member 2 are snapped together, higher firmness can be obtained.
- the hook 203 may be disposed on the third surface 2013 , or as shown in FIG. 11 , the hook 203 may be disposed on the first surface 2012 .
- the first surface 2012 is provided with a blocking portion 2015 extending toward the second surface 2014, the blocking portion 2015 is spaced apart from the hook 203, and along the concave direction of the groove 2016, The blocking portion 2015 is overlapped with the protective film 4 .
- the concave direction of the groove 2016 is the E direction in FIG. 13 .
- the blocking portion 2015 There is a relatively narrow gap between the blocking portion 2015 and the hook 203, and the edge of the protective film 4 enters the groove 2016 from the gap and engages with the hook 203.
- the blocking portion 2015 A limiting structure is formed on the protective film 4 and combined with the hook 203 can effectively prevent the protective film 4 from detaching from the hook 203 .
- the groove 2016 has a third surface 2013 connecting the first surface 2012 and the second surface 2014, and the end of the blocking portion 2015 toward the second surface 2014 is formed by extending toward the third surface 2013. bending part.
- the bending part can play two functions.
- the bending part forms a guiding structure, which facilitates the edge of the protective film 4 to enter the hook 203.
- the protective film 4 and the insulating part 2 After snapping, it can further effectively prevent the protective film 4 from detaching from the hook 203 .
- the boss 202 has two end surfaces, and the groove 2016 runs through the two end surfaces.
- the length direction of the end cover 1 is the X-axis direction in FIG. 5
- the width direction of the end cover 1 is the Y-axis direction in FIG. 5
- the thickness direction of the end cover 1 is the Z-axis direction in FIG. 5 .
- the protective film 4 includes two first protective parts arranged oppositely along the thickness direction of the electrode assembly 3 and two second protective parts arranged oppositely along the length direction of the end cap 1 .
- the protection part, the thickness direction of the end cover 1, the thickness direction of the electrode assembly 3 and the length direction of the end cover 1 are perpendicular to each other; the two first protection parts are respectively the first protection part 401 and the first protection part 402, and the two second protection parts are respectively The two protection parts are respectively the second protection part 403 and the second protection part 404 .
- the first protection part 401 and the first protection part 402 are connected through the third protection part 405 .
- each second protection part 402 is provided with an extension part, one side of the second protection part 403 is provided with a first extension part 406 , and one side of the second protection part 404 is provided with a second extension part 407 ,
- the extension part extends to the side of the first protective part away from the electrode assembly 3 (the side corresponding to the largest surface of the electrode assembly 3)
- the hole 408 includes a first hole 4081 arranged on the first protective part
- the second hole 4082 provided on the extension part the second hole 4082 partially overlaps the first hole 4081, so that the second hole 4082 and the first hole 4081 are engaged with the same hook 203
- the structure can refer to Figure 12 , as shown in FIG. 13 , the first extension portion 406 is located on the side of the first protection portion 401 away from the electrode assembly 3 , and the second hole 4082 partially overlaps the first hole 4081 and engages with the same hook 203 .
- each first protection part is provided with an extension part.
- the two sides of the first protection part 401 are respectively provided with first extension parts 406 , the second extension part 407, after the protective film 4 is folded, the first extension part 406 extends to the side of the second protection part 403 away from the electrode assembly 3 (the surface of the electrode assembly 3 along the width direction Y of the end cap, that is, the electrode assembly 3), the second extension part 407 extends to the side of the second guard part 404 away from the electrode assembly 3, and the hole 408 includes the first hole 4081 provided on the second guard part and the second hole provided on the extension part. 4082 , the second hole 4082 partially overlaps the first hole 4081 , so that the second hole 4082 and the first hole 4081 are engaged with the same hook 203 .
- the two first protection parts and the two second protection parts can be combined and connected by means of the extension part of the hook 203, so that the various parts of the protective film 4 are combined to form a whole, which is not easy to be separated, and at the same time strengthens the protective film. 4.
- the protective film 4 does not need to be provided with an extension part
- the hole 408 includes a first hole 4081 provided on the first guard part and a first hole 4081 provided on the second guard part.
- a hole 4081 after the protective film 4 is folded, the first protection part 401 , the first protection part 402 , the second protection part 403 and the second protection part 404 are engaged with the hook 203 through the first hole 4081 .
- three hooks 203 are arranged on the bosses 202 provided at both ends of the insulator 2 , and the hooks 203 located at both ends of the insulator 2 are respectively connected to the first holes 4081 on the second protection part 403 and the second protection part 404 .
- Cooperate, and the three hooks 203 are provided with avoidance parts, and the bottom surface of the avoidance parts is lower than the outer surface of the hooks 203 .
- the avoidance portion can avoid interference between multiple protective portions of the protective film 4 .
- the insulator 2 is provided with a hole 204
- the protective film 4 is provided with a boss 410 corresponding to the hole 204.
- the protective film 4 and the insulating member 2 pass through the boss 410 and The hole 204 is clamped.
- a plurality of holes 204 are provided on the insulating member 2 , and a plurality of bosses 410 are provided on the protective film 4 corresponding to the holes 204 .
- the insulator 2 is provided with 8 holes 204 on both sides of the length direction X
- the protective film 4 is provided with 8 bosses 410 . According to different structures of battery cells, the number of holes 204 and bosses 410 can be increased or decreased.
- the clamping structure of the protective film 4 and the insulator 2 can be designed in various types.
- the matching structure of the boss 410 and the hole 204 is also convenient for the clamping combination of the protective film 4 and the insulator 2. After the protective film 4 is folded, it can be combined with the insulator. 2 snapping, the snapping process is realized quickly, without too many adjustments, making the snapping process of the protective film 4 and the insulating part 2 relatively easy.
- the bosses 410 are fixed on the inner surface of the protective film 4 and protrude toward the inside of the bosses 202 , and each boss 410 is inserted into a corresponding hole 204 . Since the inside of the boss 202 is hollow, the boss 410 can be inserted into the hole 204.
- a connection portion 411 is provided between the boss 410 and the inner wall of the protective film 4 , the hole 204 includes a first section 2041 and a second section 2042 , and the second section 2042 is arranged on the first section 2042 .
- the section 2041 is away from the side of the end cap 1 , at least part of the connecting portion 411 is disposed in the second section 2042 , and the protrusion 410 forms an interference fit relationship with the first section 2041 to limit the protrusion 410 from the first section 2041 .
- the boss 410 and the first section 2041 form an interference fit relationship, after the boss 410 enters the hole 204, the boss 410 can be prevented from easily detaching from the hole 204, and the protective film 4 and the insulating member 2 can be locked together. firmness.
- the boss 410 may be spherical, cylindrical, prismatic or truncated cone, the first segment 2041 may be circular or polygonal, and the connecting portion 411 may be cylindrical or prismatic.
- the boss 410 is spherical, the connecting part 411 is cylindrical, and the first section 2041 is circular as an example: the diameter of the connecting part 411 is required to be smaller than the diameter of the boss 410, and the width of the second section 2042 is smaller than that of the first section 2041.
- the diameter of the boss 410 is slightly larger than the diameter of the first section 2041.
- a battery is provided, as shown in FIG. 2 , comprising the battery cell 10 described in the first aspect above.
- FIG. 2 a battery is provided, as shown in FIG. 2 , comprising the battery cell 10 described in the first aspect above.
- an electrical device including the battery cell 10 described in the first aspect above, and the battery cell 10 is used to provide electric energy.
- the battery cell 10 is used to provide electric energy.
- a method for manufacturing a battery cell includes:
- Step S1 providing an end cap 1 and an insulator 2;
- Step S2 providing the electrode assembly 3, so that the insulating member 2 isolates the end cap 1 and the electrode assembly 3;
- Step S3 Provide a protective film 4, sleeve the protective film 4 on the outer periphery of the electrode assembly 3, and engage the protective film 4 with the insulating member 2;
- Step S4 Provide the casing 5, and connect the end cap 1 with the casing 5 to form an accommodating cavity for accommodating the electrode assembly 3.
- a battery cell manufacturing equipment 7 is provided. As shown in FIG. 27 , the battery cell manufacturing equipment 12 includes:
- the assembly module 1202 is used to isolate the end cap 1 and the electrode assembly 3 with the insulating member 2, and the protective film 4 is sleeved on the outer periphery of the electrode assembly 3, and the protective film 4 is clamped with the insulating member 2, and the end cap 1 is connected to the casing 5 are connected to form an accommodating cavity for accommodating the electrode assembly 3 .
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Abstract
Description
Claims (18)
- 一种电池单体,其中,包括:端盖(1)和壳体(5),所述端盖(1)和所述壳体(5)形成容纳腔;电极组件(3),容纳于所述容纳腔内;绝缘件(2),用于隔离所述端盖(1)和所述电极组件(3),以及保护膜(4),用于套设于所述电极组件(3)的外周,所述保护膜(4)与所述绝缘件(2)卡接。
- 根据权利要求1所述的电池单体,其中,所述绝缘件(2)设置有卡勾(203),所述保护膜(4)对应所述卡勾(203)设置有孔(408),所述保护膜(4)与所述绝缘件(2)通过所述孔(408)和所述卡勾(203)卡接。
- 根据权利要求2所述的电池单体,其中,所述绝缘件(2)具有面向所述壳体(5)的内壁的外侧面(2011),所述卡勾(203)设置在所述外侧面(2011)上。
- 根据权利要求3所述的电池单体,其中,所述外侧面(2011)设置有凹槽(2016),所述卡勾(203)设置在所述凹槽(2016)内。
- 根据权利要求4所述的电池单体,其中,所述外侧面(2011)与对应的所述内壁的距离为J,所述卡勾(203)面向所述壳体(5)的表面与对应的所述内壁的距离为K,J≤K。
- 根据权利要求4或5所述的电池单体,其中,沿所述端盖(1)的厚度方向,所述凹槽(2016)具有相对设置的第一表面(2012)和第二表面(2014),所述第二表面(2014)相比所述第一表面(2012)远离所述端盖(1),所述卡勾(203)设置于所述第二表面(2014)。
- 根据权利要求6所述的电池单体,其中,所述第一表面(2012)设置有朝向所述第二表面(2014)延伸的阻挡部(2015),所述阻挡部(2015)与所述卡勾(203)间隔设置,沿所述凹槽(2016)的凹陷方向,所述阻挡部(2015)与所述保护膜(4)重叠设置。
- 根据权利要求7所述的电池单体,其中,所述凹槽(2016)具有连接 所述第一表面(2012)和所述第二表面(2014)的第三表面(2013),所述阻挡部(2015)朝向所述第二表面(2014)的端部朝向所述第三表面(2013)延伸形成折弯部。
- 根据权利要求4-8任一项所述的电池单体,其中,所述绝缘件(2)具有朝向所述电极组件(3)凸出的凸台(202),所述凸台(202)用于抵接所述电极组件(3),所述卡勾(203)设置在所述凸台(202)上。
- 根据权利要求9所述的电池单体,其中,沿所述端盖(1)的长度方向,所述凸台(202)具有两个端面,所述凹槽(2016)贯穿两个所述端面。
- 根据权利要求4-10任一项所述的电池单体,其中,所述保护膜(4)位于所述凹槽(2016)内的部分的高度为H,所述凹槽(2016)的高度为I,H<I。
- 根据权利要求2-11任一项所述的电池单体,其中,所述保护膜(4)包括沿所述电极组件(3)的厚度方向相对设置的两个第一防护部以及沿所述端盖(1)的长度方向相对设置的两个第二防护部,所述端盖(1)的厚度方向、所述电极组件(3)的厚度方向与所述端盖(1)的长度方向两两垂直;每一个所述第二防护部设置有延伸部,所述延伸部延伸至所述第一防护部远离所述电极组件(3)的一侧,所述孔(408)包括设置于所述第一防护部的第一孔(4081)以及设置于所述延伸部上的第二孔(4082),所述第二孔(4082)与所述第一孔(4081)部分重叠,以使所述第二孔(4082)与所述第一孔(4081)与同一个卡勾(203)卡接,或者,每一个所述第一防护部设置有延伸部,所述延伸部延伸至所述第二防护部远离所述电极组件(3)的一侧,所述孔(408)包括设置于所述第二防护部的第一孔(4081)以及设置于所述延伸部上的第二孔(4082),所述第二孔(4082)与所述第一孔(4081)部分重叠,以使所述第二孔(4082)与所述第一孔(4081)与同一个卡勾(203)卡接。
- 根据权利要求1所述的电池单体,其中,所述绝缘件(2)设置有孔(204),所述保护膜(4)对应所述孔(204)设置有凸台(410),所述保护膜(4)与所述绝缘件(2)通过所述凸台(410)和所述孔(204)卡接。
- 根据权利要求13所述的电池单体,其中,所述凸台(410)与所述保护膜(4)的内壁之间设置有连接部(411),所述孔(204)包括第一段(2041)和第二段(2042),所述第二段(2042)设置于所述第一段(2041)远离所述端盖(1)的一侧,至少部分所述连接部(411)设置于所述第二段(2042)内,所述凸台(410)与所述第一段(2041)构成过盈配合关系以限制所述凸台(410)脱出所述第一段(2041)。
- 一种电池,其中,包括权利要求1-14任一项所述的电池单体。
- 一种用电装置,其中,包括权利要求1-14任一项所述的电池单体,所述电池单体用于提供电能。
- 一种电池单体的制造方法,包括:提供端盖(1)和绝缘件(2);提供电极组件(3),使所述绝缘件(2)隔离所述端盖(1)和所述电极组件(3);提供保护膜(4),将所述保护膜(4)套设于所述电极组件(3)的外周,并使所述保护膜(4)与所述绝缘件(2)卡接;提供壳体(5),将所述端盖(1)与所述壳体(5)连接形成容纳所述电极组件(3)的容纳腔。
- 一种电池单体的制造设备,包括:提供模块(701),用于提供端盖(1)、壳体(5)、电极组件(3)、绝缘件(2)和保护膜(4);装配模块(702),用于将所述绝缘件(2)隔离所述端盖(1)和所述电极组件(3),所述保护膜(4)套设于所述电极组件(3)的外周,并将所述保护膜(4)与所述绝缘件(2)卡接,将所述端盖(1)与所述壳体(5)连接形成容纳所述电极组件(3)的容纳腔。
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