Battery cell, battery, power consumption device, and method and device for manufacturing battery cell

Abstract

Embodiments of the present application provide a battery cell (20), a battery (100), a power consuming device, and a method and apparatus (500) for manufacturing the battery cell (20). The battery cell (20) includes an adapter piece (24), an electrode assembly (23) including a main body (231) and a tab (232) extending from the main body (231), the tab (232) including a root segment (2321) connected to the main body (231) and a connecting segment (2322) connected to the adapter piece (24), and a protective film (26) including a first adhesive region (261), a second adhesive region (262), and a non-adhesive region (263) located between the first adhesive region (261) and the second adhesive region (262), wherein the first adhesive region (261) is adhered to the main body (231), the second adhesive region (262) is adhered to the connecting segment (2322), and the non-adhesive region (263) covers the root segment (2321). This battery cell (20) can have an improved service life.

Description

[Technical field]

[0001] The present application relates to the field of battery technology, and in particular to battery cells, batteries, power consuming devices, and methods and devices for manufacturing battery cells. [Background technology]

[0002] Energy conservation and reducing pollutant emissions are key to the sustainable development of the automotive industry, and electric vehicles have become an important part of this due to their energy-saving and environmental advantages. Battery technology is a key element in the development of electric vehicles.

[0003] In the development of battery technology, besides improving the safety of the battery, the service life is also an issue that cannot be ignored. Therefore, how to improve the service life of the battery is one of the technical problems that need to be solved urgently in battery technology. Summary of the Invention

[0004] The objective of the present application is to provide a battery cell, a battery, a power consuming device, and a manufacturing method and device for a battery cell, which can improve the service life of the battery cell.

[0005] The present application is realized by the following technical solutions:

[0006] According to a first aspect, the present application provides a battery cell. The battery cell includes: An adapter piece, an electrode assembly including a body and a tab extending from the body, the tab including a root segment connected to the body and a connecting segment connected to the adapter piece; A protective film including a first adhesive region, a second adhesive region, and a non-adhesive region located between the first adhesive region and the second adhesive region, wherein the first adhesive region is adhered to the body and the second adhesive region is adhered to the connection segment, and the non-adhesive region covers the root segment.

[0007] According to the battery cell of the embodiment of the present application, the non-adhesive area of ​​the protective film covers the root segment of the tab, and when the protective film is adhered to the electrode assembly, the non-adhesive area can reduce the pulling force of the protective film on the root segment of the tab, reduce the cracking of the tab, ensure the overcurrent capability of the tab, and prevent the tab from breaking the protective film after being cracked and causing a short circuit, thereby improving the service life of the battery cell.

[0008] According to some embodiments of the present application, the non-stick region extends beyond the boundary between the root segment and the body.

[0009] In the above embodiment, the boundary of one side of the non-adhesive region extends beyond the boundary between the root segment and the body, so that the non-adhesive region covers the boundary between the root segment and the body, and since the portion of the root segment that is connected to the body is a weak portion of the root segment, when the non-adhesive region covers the root segment and part of the body, the probability of the tab cracking when the tab is adhered to the protective film can be reduced.

[0010] According to some embodiments of the present application, the non-sticky region extends beyond the boundary between the root segment and the connecting segment so as to cover a portion of the connecting segment.

[0011] In the above embodiment, the boundary of the non-adhesive region at the end connected to the second adhesive region exceeds the boundary between the root segment and the connecting segment, so that the non-adhesive region covers the boundary between the root segment and the connecting segment, thereby reducing the probability of the boundary between the root segment and the connecting segment cracking when the tab is adhered to the protective film.

[0012] According to some embodiments of the present application, an area of ​​the connecting segment covered by the non-adhesive region is S1, and a total area of ​​the connecting segments is S2, satisfying 1 / 3≦S1 / S2≦2 / 3.

[0013] In the above embodiment, the percentage range in which the non-adhesive area covers the connection segment can reduce the protective film from pulling on the boundary between the root segment and the connection segment when adhering to the protective film, reduce the probability of the boundary between the root segment and the connection segment cracking when adhering to the protective film, ensure that the second adhesive area and the connection segment have a relatively large connection area, and ensure the stability of the connection between the protective film and the connection segment.

[0014] According to some embodiments of the present application, a portion of the second adhesive area is adhered to the connection segment and another portion of the second adhesive area is adhered to the adapter piece.

[0015] In the above embodiment, the second adhesive region is adhered to the connecting segment and the adapter piece, which increases the stability of the connection between the tab and the adapter piece and ensures that the protective film is firmly adhered to the electrode assembly and the adapter piece.

[0016] According to some embodiments of the present application, the electrode assembly includes a first end face and a first side face, the first end face being perpendicular to the first side face, the tab protruding from the first end face, and the protective film extending to the first side face.

[0017] In the above embodiment, the first side is connected to the edge of the first end face, and the protective film extends from the first end face to the first side, so that the protective film and the body have a relatively large connection area, which increases the stability of the connection between the protective film and the body and ensures that the protective film is firmly connected to the body.

[0018] According to some embodiments of the present application, the first adhesive region includes a first segment adhered to the first side surface and a second segment adhered to the first end surface.

[0019] In the above embodiment, the first segment is adhered to the first side surface and the second segment is adhered to the first end surface, so that the first adhesive region has connection positions on two surfaces of the electrode assembly, which enhances the stability of the connection between the first adhesive region and the main body and ensures that the first adhesive region is firmly connected to the main body.

[0020] According to some embodiments of the present application, the dimension of the first segment in a direction perpendicular to the first end face is L1, and the dimension of the first side in a direction perpendicular to the first end face is L2, satisfying 1 / 7≦L1 / L2≦1 / 5.

[0021] In the above embodiment, the range of the ratio of the dimension of the first segment to the first side surface in the direction perpendicular to the first end face can ensure the connection strength between the first segment and the first side surface.

[0022] According to some embodiments of the present application, the root segment is provided with a bend such that the adapter piece is parallel to the first end surface.

[0023] In the above embodiment, a folding point is provided in the root segment so that the adapter piece is parallel to the first end face, thereby reducing the space between the main body and the adapter piece, reducing the mounting space occupied by the tab, and improving the energy density of the battery cell.

[0024] According to some embodiments of the present application, the protective film includes a protective film body and a cover member, the protective film body having an adhesive surface, the cover member covering a portion of the adhesive surface to form the non-adhesive region, and the portion of the adhesive surface not covered by the cover member forming the first adhesive region and the second adhesive region.

[0025] In the above embodiment, the protective film body may be a tape, and the cover member covers the protective film body to form a non-adhesive area, which has a simple structure and is easy to process.

[0026] According to a second aspect, the present application provides a battery, the battery including the battery cell according to the above embodiment.

[0027] According to a third aspect, the present application provides a power consumer device, the power consumer device comprising a battery cell for providing electrical energy according to any of the above embodiments.

[0028] According to a fourth aspect, the present application provides a method for manufacturing a battery cell, the method comprising: providing an adapter piece; providing an electrode assembly including a body and a tab extending from the body, the tab including a root segment connected to the body and a connecting segment; providing a protective film including a first adhesive region, a second adhesive region, and a non-adhesive region located between the first adhesive region and the second adhesive region; connecting the connecting segment to the adapter piece, adhering the first adhesive region to the body, adhering the second adhesive region to the connecting segment, and covering the root segment with the non-adhesive region.

[0029] According to a fifth aspect, the present application provides a battery cell manufacturing apparatus, the manufacturing apparatus comprising: a providing module for providing an adapter piece, providing an electrode assembly, and providing a protective membrane, the electrode assembly including a body and a tab extending from the body, the tab including a root segment connected to the body and a connecting segment, and the protective membrane including a first adhesive region, a second adhesive region, and a non-adhesive region located between the first adhesive region and the second adhesive region; an assembly module for connecting the connection segment to the adapter piece, adhering the first adhesive region to the body, adhering the second adhesive region to the connection segment, and covering the root segment with the non-adhesive region.

[0030] The above description is only an outline of the technical solution of the present application. In order to make the technical means of the present application more clearly understood, the present application can be implemented in accordance with the content of the specification, and the above and other objectives, features and advantages of the present application more clearly understood, the following particularly cites specific embodiments of the present application for description. [Brief description of the drawings]

[0031] In order to more clearly describe the technical solutions of the embodiments of the present application, the following briefly introduces the drawings that need to be used in the embodiments of the present application, it is obvious that the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on the drawings without making creative efforts. The drawings are not drawn to scale. [Figure 1] 1 is a structural schematic diagram of a vehicle according to some embodiments of the present application. [Diagram 2] FIG. 2 is an exploded structural schematic diagram of a battery according to some embodiments of the present application. [Diagram 3] FIG. 2 is an exploded structural schematic diagram of a battery cell according to some embodiments of the present application. [Figure 4] 1 is a cross-sectional view of a battery cell according to some embodiments of the present application. [Diagram 5] 1 is a first schematic diagram of an electrode assembly and an adapter piece connected together according to some embodiments of the present application. FIG. [Figure 6] FIG. 13 is a second schematic diagram of the connection of an electrode assembly and an adapter piece according to some embodiments of the present application. [Figure 7] 1 is a schematic diagram of a connection between a protective film and a connecting segment according to some embodiments of the present application. [Figure 8] 1 is a schematic diagram of a connection between a second adhesive region and a connecting segment according to some embodiments of the present application. [Figure 9] 1 is a schematic diagram of the connection of an electrode assembly and a protective film according to some embodiments of the present application. [Figure 10] 1 is a structural schematic diagram of a protective film according to some embodiments of the present application. [Figure 11]4 is a structural schematic diagram of a protective film according to some other embodiments of the present application. FIG. [Figure 12] 1 is a structural schematic diagram of an electrode assembly according to some embodiments of the present application. [Figure 13] FIG. 2 is a schematic diagram of the connection of two electrode assemblies according to some embodiments of the present application. [Figure 14] 1 is a schematic flow chart of a method for manufacturing a battery cell according to some embodiments of the present application. [Figure 15] FIG. 1 is a schematic block diagram of a battery cell manufacturing apparatus according to some embodiments of the present application. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0032] The following describes in detail the embodiments of the technical solution of the present application in conjunction with the drawings. The following embodiments are only used to more clearly explain the technical solution of the present application, and are only used as examples, which cannot limit the protection scope of the present application.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art of the present application, and the terms used herein are merely for describing specific embodiments and are not intended to limit the present application, and the terms "including" and "having" and any variations thereof in the specification and claims of this application and the description of the drawings above are intended to cover the non-exclusive "including".

[0034] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are used only to distinguish different objects, and cannot be understood as indicating or implying a relative importance, or implicitly indicating the number, a particular order, or a hierarchical relationship of the indicated technical features. In the description of the embodiments of the present application, "plurality" means two or more, unless expressly and specifically limited.

[0035] An "embodiment" referred to in this specification means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. Appearances of this phrase in various places in the specification do not necessarily all refer to the same embodiment, nor are they mutually exclusive independent or alternative embodiments from other embodiments. Those skilled in the art will understand, both explicitly and implicitly, that the embodiments described herein can be combined with other embodiments.

[0036] In the description of the embodiments of the present application, the term "and / or" merely describes the relationship between related objects and indicates that three relationships may exist, for example, A and / or B may represent three cases: A alone, a combination of A and B, and B alone. In addition, the character " / " in this specification generally indicates that the related objects before and after are in an "or" relationship.

[0037] In describing the embodiments of the present application, the term "multiple" refers to two or more (including two); similarly, "multiple sets" refers to two or more (including two sets); and "multiple sheets" refers to two or more (including two sheets).

[0038] In the description of the embodiments of the present application, the orientations or positional relationships indicated by technical terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial direction", "radial direction", "circumferential direction", etc. are orientations or positional relationships shown based on the drawings, and are merely for the convenience and simplification of the description of the embodiments of the present application, and do not indicate or imply that the referred devices or elements must have a specific orientation and be configured and operated in a specific orientation, and therefore should not be understood as limitations on the present application.

[0039] In the description of the embodiments of the present application, unless otherwise clearly defined or limited, the technical terms "attached", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, may be a fixed connection, a detachable connection, or may be integrated, may be a mechanical connection, may be an electrical connection, may be a direct connection, may be an indirect connection through an intermediate medium, may be a communication between two elements, or may be a relationship of interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present application according to the specific circumstances.

[0040] A battery, as referred to in this application, is a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, a battery, as referred to in this application, may include a battery module, a battery pack, or the like.

[0041] The battery cell includes an electrode assembly and an electrolyte, and the electrode assembly is composed of a positive electrode plate, a negative electrode plate, and a separator. The battery cell is mainly operated by the movement of metal ions between the positive electrode plate and the negative electrode plate. The positive electrode plate includes a positive electrode collector and a positive electrode active material layer, and the positive electrode active material layer is applied to the surface of the positive electrode collector, and the collector on which the positive electrode active material layer is not applied protrudes from the collector on which the positive electrode active material layer has already been applied, and the collector on which the positive electrode active material layer is not applied is a positive electrode tab. Taking a lithium ion battery as an example, the material of the positive electrode collector may be aluminum, and the positive electrode active material may be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganate, etc. The negative electrode plate includes a negative electrode collector and a negative electrode active material layer, the negative electrode active material layer is applied to the surface of the negative electrode collector, the collector on which the negative electrode active material layer is not applied protrudes from the collector on which the negative electrode active material layer has already been applied, and the collector on which the negative electrode active material layer is not applied is a negative electrode tab. The material of the negative electrode collector may be copper, and the negative electrode active material may be carbon or silicon, etc. In order to ensure that melting does not occur even when a large current is passed, the number of positive electrode tabs is multiple and stacked, and the number of negative electrode tabs is multiple and stacked. The material of the separator may be PP (polypropylene) or PE (polyethylene), etc.

[0042] In this application, the electrode assembly includes a body and a tab extending from the body, the tab having a root segment and a connecting segment, the root segment being connected to the body and the connecting segment being adapted to be connected to an adapter piece.

[0043] The development of battery technology requires simultaneous consideration of a wide range of design factors, such as performance parameters like energy density, discharge capacity, and charge / discharge ratio, as well as the service life of the battery.

[0044] There are many factors that affect the service life of a battery cell, such as environmental temperature, damage to components during assembly (e.g., tab cracking), lithium precipitation, etc. According to the inventor's research, there are many factors that can cause tab cracking during battery production, such as tab welding, tab bending process, and tab taping process. Furthermore, according to the inventor's research, tab cracking is likely to occur when the tab is taped after being welded to the adapter piece.

[0045] During battery production, after the tab is welded to the adapter piece, a protective film (e.g., tape) needs to be attached to the front and back of the tab in order to prevent the battery from short-circuiting. Currently, when an automatic taping machine is taping, the taping mechanism sucks up a protective film of a certain dimension, and sequentially covers the edge of the large surface of the electrode assembly, the separator on the end surface of the electrode assembly, the root segment of the tab, and the connection segment of the tab. In order to ensure the adhesion effect between the protective film and the tab, the root segment of the tab is generally rolled to ensure that the protective film is tightly attached to the tab. Since the root segment of the tab is the weak part of the tab, when the tab is rolled during taping, the protective film applies a pulling force to the tab, and the tab is subjected to the pulling force of the protective film, which makes the tab easily crack. After the tab is cracked, the overcurrent capacity of the tab is reduced, the temperature of the battery cell is easily increased, and some of the cracked tabs are easily broken into the protective film, which further causes a short circuit and affects the service life of the battery cell.

[0046] In view of this, in order to solve the problem of the tab cracking, the inventors have conducted extensive research and have designed a battery cell including an adapter piece, an electrode assembly, and a protective film. The electrode assembly includes a body and a tab extending from the body, and the tab includes a root segment connected to the body and a connecting segment connected to the adapter piece. The protective film includes a first adhesive region, a second adhesive region, and a non-adhesive region located between the first adhesive region and the second adhesive region, where the first adhesive region is bonded to the body, the second adhesive region is bonded to the connecting segment, and the non-adhesive region covers the root segment to prevent the root segment from being adhered.

[0047] In such a battery cell, because the non-adhesive area covers the root segment, when the protective film is attached to the electrode assembly, the non-adhesive area and the root segment do not pull against each other, reducing the tensile force that the protective film exerts on the root segment, reducing the occurrence of tab cracking, ensuring the overcurrent capacity of the tab, and preventing the tab from breaking the protective film and causing a short circuit after cracking, thereby improving the service life of the battery cell.

[0048] In the present application, the battery cell may include a lithium ion secondary battery, a lithium ion primary battery, a lithium-sulfur battery, a sodium lithium ion battery, a sodium ion battery, or a magnesium ion battery, etc., and the embodiments of the present application are not limited thereto.

[0049] The battery cells disclosed in the embodiments of the present application may be used in, but are not limited to, power consumption devices such as vehicles, ships, and aircraft. A power supply system including the battery cells disclosed in the present application and constituting the power consumption device may be used.

[0050] An embodiment of the present application provides a power consumption device that uses a battery as a power source, and the power consumption device may be, but is not limited to, a mobile phone, a tablet computer, a notebook computer, an electric toy, an electric tool, an electric bicycle, an electric motorcycle, an electric car, a ship, a spacecraft, etc. Here, the electric toy may include a stationary or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, an electric plane toy, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, a spaceship, etc.

[0051] For convenience of explanation, the following embodiment will be described taking as an example that the power consuming device of one embodiment of the present application is a vehicle.

[0052] Referring to FIG. 1, FIG. 1 is a structural schematic diagram of a vehicle 1000 according to some embodiments of the present application. The vehicle 1000 may be a gasoline vehicle, a gas vehicle, or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle, a range extender vehicle, etc. A battery 100 is installed inside the vehicle 1000, and the battery 100 may be installed at the bottom, head, or tail of the vehicle 1000. The battery 100 may be used to supply power to the vehicle 1000, for example, the battery 100 may be used as an operating power source for the circuit system of the vehicle 1000, for example, for the startup, navigation, and operating power consumption needs during driving of the vehicle 1000.

[0053] The vehicle 1000 may further include a controller 200 and a motor 300, where the controller 200 is used to control the battery 100 to supply power to the motor 300, for example for startup, navigation, and operating power consumption needs of the vehicle 1000 during driving.

[0054] In some embodiments of the present application, the battery 100 is not only used as an operating power source for the vehicle 1000, but can also provide driving power to the vehicle 1000 in place of, or in place of, gasoline or natural gas as a driving power source for the vehicle 1000.

[0055] Referring to FIG. 2, FIG. 2 is an exploded structural schematic diagram of a battery 100 according to some embodiments of the present application. The battery 100 includes a housing 10 and a battery cell 20 housed in the housing 10. Here, the housing 10 is used to provide a housing space for the battery cell 20, and the housing 10 may adopt various structures. In some embodiments, the housing 10 may include a first part 11 and a second part 12, the first part 11 and the second part 12 are covered with each other, and the first part 11 and the second part 12 jointly define a housing space for housing the battery cell 20. The second part 12 may be a hollow structure with one end open, and the first part 11 may be a plate-like structure, and the first part 11 is covered with the open side of the second part 12 so that the first part 11 and the second part 12 jointly define the housing space. The first portion 11 and the second portion 12 may each have a hollow structure with one side open, and the open side of the first portion 11 is placed over the open side of the second portion 12 .

[0056] In the battery 100, the battery cell 20 may be multiple, and the multiple battery cells 20 may be connected in series, parallel, or series-parallel. The series-parallel connection means that the multiple battery cells 20 may be connected in series or parallel. The multiple battery cells 20 may be directly connected in series, parallel, or series-parallel, and then the entire battery cell 20 may be housed in the housing 10. Of course, the battery 100 may be formed by first connecting the multiple battery cells 20 in series, parallel, or series-parallel to form a battery module, and the multiple battery modules may be further connected in series, parallel, or series-parallel to form an integrated battery module and housed in the housing 10. The battery 100 may further include other structures. For example, the battery 100 may further include a bus bar member for achieving electrical connection between the multiple battery cells 20.

[0057] Here, each battery cell 20 may be a secondary battery or a primary battery, and may be, but is not limited to, a lithium-sulfur battery, a sodium ion battery, or a magnesium ion battery.

[0058] 3, which is a schematic exploded view of a battery cell 20 according to some embodiments of the present application. The battery cell 20 is a minimum unit constituting a battery 100. As shown in FIG. 3, the battery cell 20 includes an end cap 21, a housing 22, an electrode assembly 23, an adapter piece 24, and an electrode terminal 25.

[0059] The end cap 21 is a member that covers the opening of the housing 22 to isolate the internal environment of the battery cell 20 from the external environment. Without being limited thereto, the shape of the end cap 21 may be adapted to the shape of the housing 22 and fitted into the housing 22. Optionally, the end cap 21 may be made of a material (e.g., aluminum alloy) having a certain hardness and strength, so that the end cap 21 is less likely to deform when subjected to a pressing impact, and the battery cell 20 can have higher structural strength and improve safety performance. The end cap 21 may 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 value. The material of the end cap 21 may be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application are not particularly limited thereto. In some embodiments, an insulating member may be further provided inside the end cap 21, and the insulating member may be used to isolate the end cap 21 from the electrical connection members in the housing 22 so as to reduce the risk of short circuit. Illustratively, the insulating member may be plastic, rubber, or the like.

[0060] The housing 22 is an assembly for fitting into the end cap 21 to form an internal environment of the battery cell 20, and the formed internal environment may be used to accommodate the electrode assembly 23, the electrolyte, and other components. The housing 22 and the end cap 21 may be independent members, or an opening may be provided in the housing 22, and the end cap 21 may be placed over the opening to form the internal environment of the battery cell 20. Without being limited thereto, the end cap 21 and the housing 22 may be integrated, specifically, the end cap 21 and the housing 22 may first form a common connection surface before other components enter the housing, and the end cap 21 may be placed over the housing 22 when it is necessary to package the inside of the housing 22. The shape of the housing 22 may be determined according to the specific shape and size of the electrode assembly 23. The material of the housing 22 may be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application are not particularly limited thereto.

[0061] The electrode assembly 23 is a component where an electrochemical reaction occurs in the battery cell 20. One or more electrode assemblies 23 may be included in the housing 22. The electrode assembly 23 is mainly formed by winding or stacking a positive electrode plate and a negative electrode plate, and a separator is generally provided between the positive electrode plate and the negative electrode plate. The parts of the positive electrode plate and the negative electrode plate that have active materials constitute the body 231 of the electrode assembly 23, and the parts of the positive electrode plate and the negative electrode plate that do not have active materials constitute the tabs 232, respectively. The positive electrode tabs and the negative electrode tabs may both be located at one end of the body 231, or may be located at both ends of the body 231, respectively. During charging and discharging of the battery 100, the positive electrode active material and the negative electrode active material react with the electrolyte, and the tabs 232 are connected to the electrode terminals 25 by the adapter pieces 24 to form a current circuit.

[0062] The electrode terminal 25 is installed on the end cap 21 , and the electrode terminal 25 is electrically connected to the electrode assembly 23 by the adapter piece 24 , and is used to output or input electrical energy of the battery cell 20 .

[0063] According to some embodiments of the present application, referring to FIG. 4 and further to FIG. 5, FIG. 4 is a cross-sectional view of a battery cell 20 according to some embodiments of the present application, FIG. 5 is a first connection schematic diagram of an electrode assembly 23 and an adapter piece 24 according to some embodiments of the present application, and FIG. 5 is a schematic diagram before the tab 232 is bent after the tab 232 is connected to the adapter piece 24. The present application provides a battery cell 20. As shown in FIG. 4 and FIG. 5, the battery cell 20 includes an adapter piece 24, an electrode assembly 23, and a protective film 26. The electrode assembly 23 includes a body 231 and a tab 232 extending from the body 231, and the tab 232 includes a root segment 2321 connected to the body 231 and a connection segment 2322 connected to the adapter piece 24. The protective film 26 includes a first adhesive region 261, a second adhesive region 262, and a non-adhesive region 263 located between the first adhesive region 261 and the second adhesive region 262, where the first adhesive region 261 is adhered to the main body 231, the second adhesive region 262 is adhered to the connecting segment 2322, and the non-adhesive region 263 covers the root segment 2321.

[0064] FIG. 5 is a schematic diagram of protective film 26 adhered to tab 232 before tab 232 is bent; to facilitate description of non-adhesive region 263, in the drawing, a first boundary line F1 is the boundary line between first adhesive region 261 and non-adhesive region 263, and a second boundary line F2 is the boundary line between non-adhesive region 263 and second adhesive region 262.

[0065] The adapter piece 24 is a conductive member and is used to realize an electrical connection between the tab 232 and the electrode terminal 25 so that electrical energy of the electrode assembly 23 is conducted out by the electrode terminal 25 when the battery cell 20 is discharged, or electrical energy is introduced into the electrode assembly 23 by the electrode terminal 25 when the battery cell 20 is charged.

[0066] The electrode assembly 23 includes a positive electrode plate 237 and a negative electrode plate 238, and the positive electrode plate 237 and the negative electrode plate 238 are wound to form a wound structure. A separator 239 is installed between the positive electrode plate 237 and the negative electrode plate 238 to separate the positive electrode plate 237 and the negative electrode plate 238. The electrode assembly 23 is a flat body, and one tab 232 is installed for each turn of the electrode plate, and the tab 232 is located on one side of the winding axis of the electrode assembly 23 in the thickness direction Z of the electrode assembly 23. For example, as shown in FIG. 5, in the thickness direction Z of the electrode assembly 23, multiple layers of tabs 232 are installed in the lower half of the electrode assembly 23. For convenience of description, unless otherwise specified, the tab 232 in the embodiments of the present application is a general term for multiple layers of tabs 232.

[0067] The connection segment 2322 of the tab 232 is electrically connected to the adapter piece 24, for example, the connection segment 2322 is welded to the adapter piece 24, or the connection segment 2322 is connected to the adapter piece 24 by a conductive paste. Optionally, the connection segment 2322 is welded to the adapter piece 24 to ensure the connection strength between the connection segment 2322 and the adapter piece 24.

[0068] The protective film 26 is a member for protecting the tabs 232 to prevent an internal short circuit from occurring in the battery cell 20. The protective film 26 may be an insulating tape.

[0069] The non-adhesive region 263 is a region of the protective film 26 that does not have adhesiveness, and when the protective film 26 is fitted to the tab 232, the non-adhesive region 263 covers the root segment 2321 of the tab 232 to shield the root segment 2321, but the non-adhesive region 263 does not apply a pulling force to the root segment 2321. The purpose of rolling the protective film 26 after the protective film 26 is connected to the tab 232 is to make the protective film 26 adhere to the tab 232, and since the non-adhesive region 263 and the root segment 2321 are not bonded together, the action force of the roll is received only by the protective film 26, and when the protective film 26 is pulled, the pulling force is not easily transmitted to the root segment 2321, and the tab 232 is not easily torn.

[0070] The non-adhesive region 263 is located between the first adhesive region 261 and the second adhesive region 262, in other words, the first adhesive region 261 and the second adhesive region 262 are located on opposite sides of the non-adhesive region 263, and for example, the first adhesive region 261, the non-adhesive region 263, and the second adhesive region 262 may be distributed in order along the extending direction of the protective film 26, which may be the extending direction of the tab 232. The protective film 26 covers the entire tab 232 and extends beyond the tab 232 to provide protection for the tab 232.

[0071] According to the battery cell 20 of the embodiment of the present application, the non-adhesive region 263 of the protective film 26 covers the root segment 2321 of the tab 232. When the protective film 26 is bonded to the electrode assembly 23, the non-adhesive region 263 is not bonded to the root segment 2321. This reduces the tensile force that the protective film 26 exerts on the root segment 2321 of the tab 232, reduces the occurrence of cracking of the tab 232, ensures the overcurrent capability of the tab 232, and prevents the cracked tab 232 from breaking the protective film 26 and causing a short circuit, thereby improving the service life of the battery cell 20.

[0072] 6, which is a second connection schematic diagram of the electrode assembly 23 and the adapter piece 24 according to some embodiments of the present application, after the tab 232 is connected to the adapter piece 24 and before the tab 232 is bent. Optionally, according to some embodiments of the present application, the non-adhesive region 263 extends beyond the boundary between the root segment 2321 and the body 231, as shown in FIGS. 5 and 6.

[0073] The non-adhesive region 263 has two opposing ends, one end connected to the first adhesive region 261 and the other end connected to the second adhesive region 262. Because the first adhesive region 261 is adhered to the body 231, the root segment 2321 of the tab 232 is connected to the body 231, and when the non-adhesive region 263 crosses the boundary between the root segment 2321 and the body 231, this means that the end of the non-adhesive region 263 connected to the first adhesive region 261 crosses the boundary between the root segment 2321 and the body 231.

[0074] When the end of non-adhesive region 263 connected to first adhesive region 261 covers the boundary between root segment 2321 and main body 231, non-adhesive region 263 covers root segment 2321 and part of main body 231, and since the portion of root segment 2321 connected to main body 231 is a weak portion of root segment 2321, when non-adhesive region 263 covers root segment 2321 and part of main body 231, the probability of tab 232 cracking when tab 232 is adhered to protective film 26 can be reduced.

[0075] According to some embodiments of the present application, optionally, non-adhesive region 263 extends beyond the boundary between root segment 2321 and connecting segment 2322 and covers a portion of connecting segment 2322, as shown in FIGS.

[0076] The non-adhesive region 263 has two opposing ends, where one end is connected to the second adhesive region 262. Because the second adhesive region 262 is adhered to the connecting segment, the non-adhesive region 263 extends beyond the boundary between the root segment 2321 and the connecting segment 2322, meaning that the end of the non-adhesive region 263 connected to the second adhesive region 262 extends beyond the boundary between the root segment 2321 and the connecting segment 2322, i.e., the non-adhesive region 263 covers the boundary between the root segment 2321 and the connecting segment 2322.

[0077] By covering the boundary between the root segment 2321 and the connecting segment 2322, the non-adhesive region 263 protects the boundary between the root segment 2321 and the connecting segment 2322, and reduces the probability of the boundary between the root segment 2321 and the connecting segment 2322 cracking when the tab 232 is adhered to the protective film 26.

[0078] 7, which is a schematic diagram of the connection of the protective film 26 and the connecting segment 2322 according to some embodiments of the present application. Optionally, according to some embodiments of the present application, as shown in FIG. 7, the area of ​​the connecting segment 2322 covered by the non-adhesive region 263 is S1, and the total area of ​​the connecting segment 2322 is S2, satisfying 1 / 3≦S1 / S2≦2 / 3.

[0079] The area of ​​the connecting segment 2322 covered by the non-adhesive region 263 is S1, that is, the area of ​​the portion of the non-adhesive region 263 covering the connecting segment 2322 is S1. S1 / S2 is S1 divided by S2, and represents the ratio of S1 to S2. The smaller the value of S1 / S2, the smaller the area of ​​the connecting segment 2322 covered by the non-adhesive region 263. In this case, the area of ​​the non-adhesive region 263 covering the boundary between the root segment 2321 and the connecting segment 2322 is smaller, and the protective effect of the root segment 2321 and the connecting segment 2322 is relatively poor. The larger the value of S1 / S2, the larger the area of ​​the connecting segment 2322 covered by the non-adhesive region 263, and the smaller the adhesive area between the connecting segment 2322 and the second adhesive region 262, which affects the connection strength between the second adhesive region 262 and the connecting segment 2322.

[0080] The range of the ratio between the area of ​​the connecting segment 2322 covered by the non-adhesive region 263 and the total area of ​​the connecting segment 2322 can reduce the pulling of the protective film 26 at the boundary between the root segment 2321 and the connecting segment 2322 when it is adhered to the protective film 26, reduce the probability of the boundary between the root segment 2321 and the connecting segment 2322 cracking when it is adhered to the protective film 26, ensure that the second adhesive region 262 and the connecting segment 2322 have a relatively large connection area, and ensure the stability of the connection between the protective film 26 and the connecting segment 2322.

[0081] Alternatively, S1 / S2=1 / 2, which not only ensures that the area of ​​the connecting segment 2322 covered by the non-adhesive region 263 is relatively large, but also ensures that the second adhesive region 262 is firmly connected to the connecting segment 2322.

[0082] 8, which is a schematic diagram of a connection between the second adhesive region 262 and the connecting segment 2322 according to some embodiments of the present application. Optionally, according to some embodiments of the present application, one portion of the second adhesive region 262 is attached to the connecting segment 2322 and another portion is attached to the adapter piece 24, as shown in FIG.

[0083] One portion of the second adhesive region 262 is adhered to the connecting segment 2322, and another portion is adhered to the adapter piece 24. In other words, both ends of the second adhesive region 262 are adhered to the connecting segment 2322 and the adapter piece 24, respectively, such that the second adhesive region 262 covers the end of the tab 232 that is away from the body 231, and the second adhesive region 262 has an extended extension length.

[0084] The second adhesive area 262 is adhered to the connection segment 2322 and the adapter piece 24, and the second adhesive area 262 covers the end of the tab 232, prevents the multi-layer tab 232 from loosening, increases the stability of the connection between the tab 232 and the adapter piece 24, and ensures that the protective film 26 is firmly adhered to the electrode assembly 23 and the adapter piece 24.

[0085] 9, Fig. 9 is a schematic diagram of the connection of the electrode assembly 23 and the protective membrane 26 according to some embodiments of the present application, and Fig. 9 is a schematic diagram of the tab 232 after it is connected to the adapter piece 24 and before it is bent. According to some embodiments of the present application, optionally, as shown in Fig. 9, the electrode assembly 23 includes a first end face 233 and a first side face 234, the first end face 233 is perpendicular to the first side face 234, the tab 232 protrudes from the first end face 233, and the protective membrane 26 extends to the first side face 234.

[0086] The electrode assembly 23 has a wound structure and is a flat body, and has a thickness direction Z and a width direction. The electrode assembly 23 further includes a second end surface 235, where the second end surface 235 and the first end surface 233 are two opposing surfaces in the width direction of the electrode assembly 23, and the first end surface 233 is an end surface from which the tab 232 of the electrode assembly 23 extends.

[0087] The electrode assembly 23 further includes a second side surface 236, the first side surface 234 and the second side surface 236 being two opposing surfaces in the thickness direction Z of the electrode assembly 23 and extending along the thickness direction Z of the electrode assembly 23, and the root segment 2321 of the tab 232 approaches the second side surface 236 and moves away from the first side surface 234. The first side surface 234 and the second side surface 236 are both connected to the first end surface 233 and the second end surface 235, the first side surface 234 is disposed perpendicular to the first end surface 233, the second side surface 236 is disposed perpendicular to the first end surface 233, the first side surface 234 is connected to an edge of the first end surface 233, and the second side surface 236 is connected to an edge of the first end surface 233.

[0088] By the protective film 26 extending from the first end face 233 to the first side face 234, the protective film 26 and the body 231 have a relatively large connection area, which increases the stability of the connection between the protective film 26 and the body 231 and ensures that the protective film 26 is firmly connected to the body 231.

[0089] According to some embodiments of the present application, optionally, as shown in FIG. 9, the first adhesive area 261 includes a first segment 2611 adhered to the first side surface 234 and a second segment 2612 adhered to the first end surface 233.

[0090] When the first segment 2611 and the second segment 2612 are placed adjacent to each other and the first adhesive area 261 is adhered to the body 231, the first segment 2611 is adhered to the first side 234 and the second segment 2612 is adhered to the first end face 233, so that the first adhesive area 261 has connection positions on two surfaces of the electrode assembly 23, which enhances the stability of the connection between the first adhesive area 261 and the body 231 and ensures that the first adhesive area 261 is firmly connected to the body 231.

[0091] According to some embodiments of the present application, optionally, as shown in FIG. 9 , the dimension of the first segment 2611 in a direction perpendicular to the first end surface 233 is L1, and the dimension of the first side surface 234 in a direction perpendicular to the first end surface 233 is L2, satisfying 1 / 7≦L1 / L2≦1 / 5.

[0092] The dimension L1 of the first segment 2611 in a direction perpendicular to the first end face 233 is the length of the projection of the first segment 2611 along a direction perpendicular to the first end face 233 in a plane perpendicular to the first end face 233, i.e., the extension length of the first segment 2611 on the first side 234.

[0093] The dimension L2 of the first side surface 234 in a direction perpendicular to the first end surface 233 is the dimension of the electrode assembly 23 in the width direction of the first side surface 234. L1 / L2 is L1 divided by L2 and represents the ratio of L1 to L2.

[0094] When 1 / 7≦L1 / L2≦1 / 5, the connection strength between the first segment 2611 and the first side surface 234 can be ensured. When L1 / L2 is too large, the dimension of the first segment 2611 in the direction perpendicular to the first end surface 233 is too large, which increases the cost. When L1 / L2 is too small, the dimension of the first segment 2611 in the direction perpendicular to the first end surface 233 is too small, which affects the stability of the connection between the first segment 2611 and the first side surface 234.

[0095] Optionally, L1 / L2=1 / 6 to ensure the stability of the connection between the first segment 2611 and the first side 234.

[0096] According to some embodiments of the present application, as shown in FIG. 4, the root segment 2321 is optionally provided with a bend 2323 such that the adapter piece 24 is parallel to the first end surface 233 .

[0097] Fold point 2323 is the bend that is formed in root segment 2321 after tab 232 is bent.

[0098] By providing the bending point 2323 at the root segment 2321, the adapter piece 24 is parallel to the first end face 233, the space between the main body 231 and the adapter piece 24 is reduced, the mounting space occupied by the tab 232 is reduced, and the energy density of the battery cell 20 is improved.

[0099] 10, which is a structural schematic diagram of the protective film 26 according to some embodiments of the present application. According to some embodiments of the present application, optionally, as shown in FIG. 10, the protective film 26 includes a protective film body 264 and a cover member 265, the protective film body 264 has an adhesive surface 2641, the cover member 265 covers a part of the adhesive surface 2641 to form a non-adhesive area 263, and the part of the adhesive surface 2641 that is not covered by the cover member 265 forms a first adhesive area 261 and a second adhesive area 262.

[0100] The protective film main body 264 has an adhesive surface 2641, and the protective film main body 264 may be a tape. The cover member 265 is used to be covered by the adhesive surface 2641, and the surface of the cover member 265 facing the adhesive surface 2641 may or may not have adhesiveness. When the surface of the cover member 265 facing the adhesive surface 2641 has adhesiveness, the cover member 265 may be a tape that increases the connection strength between the cover member 265 and the protective film main body 264.

[0101] The surface of the cover member 265 facing away from the adhesive surface 2641 is not adhesive, and after the cover member 265 covers the adhesive surface 2641, the cover member 265 is adhered to the protective film main body 264, and the area of ​​the protective film main body 264 covered by the cover member 265 forms a non-adhesive area 263.

[0102] In the above embodiment, the protective film body 264 may be a tape, and the cover member 265 covers the protective film body 264 to form the non-adhesive region 263, which has a simple structure and is easy to process. The tape may have a structure in which an adhesive is applied to one side, and the material thereof may be, but is not limited to, polychloroethylene, polyethylene, polypropylene, polyethylene terephthalate, etc.

[0103] 11, which is a structural schematic diagram of a protective film 26 according to another embodiment of the present application. According to some embodiments of the present application, optionally, as shown in FIG. 11, the protective film 26 includes a substrate 266 and an adhesive layer 267, the adhesive layer 267 is applied to both sides of the same surface of the substrate 266 to form a first adhesive region 261 and a second adhesive region 262, and the region of the substrate 266 where the adhesive layer 267 is not applied forms a non-adhesive region 263.

[0104] The substrate 266 may be made of materials such as, but not limited to, polychloroethylene, polyethylene, polypropylene, and polyethylene terephthalate.

[0105] 12, which is a structural schematic diagram of the electrode assembly 23 according to some embodiments of the present application. According to some embodiments of the present application, optionally, the electrode assembly 23 includes two tabs 232, one tab 232 is a positive electrode tab and another tab 232 is a negative electrode tab, and the two tabs 232 may extend from one end of the body 231 as shown in FIG. 9, or the two tabs 232 may extend from both ends of the body 231 as shown in FIG.

[0106] 13, which is a schematic diagram of two electrode assemblies 23 connected together according to some embodiments of the present application. Optionally, according to some embodiments of the present application, as shown in FIG. 13, the battery cell 20 includes two electrode assemblies 23 each connected to one adapter piece 24.

[0107] According to some embodiments of the present application, the present application further provides a battery 100 including the battery cell 20 described in any one of the above embodiments.

[0108] According to some embodiments of the present application, the present application further provides a power consumer device, the power consumer device including a battery cell 20 for providing electrical energy for the power consumer device, as described in any one of the above embodiments.

[0109] The power consuming device may be any one of the devices or systems described above that utilizes the battery 100 .

[0110] 9 , according to some embodiments of the present application, the present application provides a battery cell 20 including an adapter piece 24, an electrode assembly 23, and a protective film 26. The electrode assembly 23 includes a body 231 and a tab 232 extending 231 from the body, the body 231 including a first end surface 233 and a first side surface 234, the tab 232 protruding from the first end surface 233, the tab 232 including a root segment 2321 connected to the body 231 and a connection segment 2322 welded to the adapter piece 24. The protective film 26 includes a first adhesive area 261, a second adhesive area 262, and a non-adhesive area 263 located between the first adhesive area 261 and the second adhesive area 262, the first adhesive area 261 includes a first segment 2611 adhered to the first side surface 234 and a second segment 2612 adhered to the first end face 233, the second adhesive area 262 is adhered to the connection segment 2322 and the adapter piece 24, the non-adhesive area 263 covers the root segment 2321, and both ends of the non-adhesive area 263 extend beyond the boundary between the root segment 2321 and the main body 231 and the boundary between the root segment 2321 and the connection segment 2322, respectively.

[0111] The non-adhesive region 263 of the protective film 26 covers the root segment 2321 of the tab 232, and reduces the tensile force that the protective film 26 applies to the root segment 2321 of the tab 232 when the protective film 26 is adhered to the electrode assembly 23, reducing the occurrence of cracking of the tab 232 and ensuring the overcurrent capability of the tab 232. It is also possible to prevent the cracked tab 232 from breaking the protective film 26 and causing a short circuit, thereby improving the service life of the battery cell 20. Furthermore, the non-adhesive region 263 is formed by covering the protective film 26 with a cover member 265.

[0112] 14 is a schematic flow chart of a method for manufacturing a battery cell according to some embodiments of the present application. According to some embodiments of the present application, the present application provides a method for manufacturing a battery cell. As shown in FIG. 14, the method for manufacturing a battery cell may include the following steps:

[0113] At 401, an adapter piece 24 is provided.

[0114] At 402 , an electrode assembly 23 is provided that includes a body 231 and a tab 232 extending from the body 231 , the tab 232 including a root segment 2321 connected to the body 231 and a connecting segment 2322 .

[0115] At 403, a protective film 26 is provided that includes a first adhesive region 261, a second adhesive region 262, and a non-adhesive region 263 located between the first adhesive region 261 and the second adhesive region 262.

[0116] At 404 , the connecting segment 2322 is connected to the adapter piece 24 , the first adhesive region 261 is adhered to the body 231 , the second adhesive region 262 is adhered to the connecting segment 2322 , and the non-adhesive region 263 covers the root segment 2321 .

[0117] 15 is a schematic block diagram of a battery cell manufacturing equipment 500 according to some embodiments of the present application. According to some embodiments of the present application, the present application provides a battery cell manufacturing equipment 500. As shown in FIG. 15, the battery cell manufacturing equipment 500 includes a providing module 501 and an assembling module 502. The providing module 501 is used to provide an adapter piece 24, provide an electrode assembly 23, and provide a protective film 26. The electrode assembly 23 includes a body 231 and a tab 232 extending from the body 231, the tab 232 includes a root segment 2321 connected to the body 231 and a connecting segment 2322, and the protective film 26 includes a first adhesive region 261, a second adhesive region 262, and a non-adhesive region 263 located between the first adhesive region 261 and the second adhesive region 262. The assembly module 502 is used to connect the connection segment 2322 to the adapter piece 24, adhere the first adhesive area 261 to the body 231, adhere the second adhesive area 262 to the connection segment 2322, and cover the base segment 2321 with the non-adhesive area 263.

[0118] Although the present application has been described with reference to the preferred embodiments, various modifications may be made thereto and equivalents may be substituted for parts without departing from the scope of the present application. In particular, the respective technical features mentioned in each embodiment may be combined in any manner, provided no structural conflict occurs. The present application is not limited to the specific embodiments disclosed in the specification, but includes all technical solutions falling within the scope of the claims. [Explanation of symbols]

[0119] 100-battery, 10-casing, 11-first portion, 12-second portion, 20-battery cell, 21-end cap, 22-housing, 23-electrode assembly, 231-body, 232-tab, 2321-root segment, 2322-connection segment, 2323-fold point, 233-first end, 234-first side, 235-second end, 236-second side, 237-positive plate, 238-negative plate, 239-separator 26-adapter piece, 24-electrode terminal, 25-electrode terminal, 26-protective film, 261-first adhesive region, 2611-first segment, 2612-second segment, 262-second adhesive region, 263-non-adhesive region, 264-protective film body, 2641-adhesive surface, 265-cover member, 266-substrate, 267-adhesive layer, F1-first boundary line, F2-second boundary line, Z-thickness direction, 200-controller, 300-motor, 1000-vehicle

Claims

1. A battery cell, An adapter piece, an electrode assembly including a body and a tab extending from the body, the tab including a root segment connected to the body and a connecting segment connected to the adapter piece; a protective film including a first adhesive region, a second adhesive region, and a non-adhesive region located between the first adhesive region and the second adhesive region, the first adhesive region being adhered to the body, the second adhesive region being adhered to the connecting segment, and the non-adhesive region covering the root segment; Including a battery cell.

2. The battery cell of claim 1 , wherein the non-adhesive area extends beyond the boundary between the root segment and the body.

3. The battery cell according to claim 1 or 2, wherein the non-adhesive region extends beyond a boundary between the root segment and the connection segment so as to cover a portion of the connection segment.

4. 4. The battery cell according to claim 3, wherein an area of ​​the connection segments covered by the non-adhesive regions is S1, a total area of ​​the connection segments is S2, and 1 / 3≦S1 / S2≦2 / 3 is satisfied.

5. The battery cell of claim 3 , wherein a portion of the second adhesive area is adhered to the connection segment and another portion of the second adhesive area is adhered to the adapter piece.

6. 6. The battery cell of claim 1, wherein the electrode assembly includes a first end face and a first side face, the first end face being perpendicular to the first side face, the tab protruding from the first end face, and the protective film extending to the first side face.

7. The battery cell of claim 6 , wherein the first adhesive region includes a first segment adhered to the first side surface and a second segment adhered to the first end surface.

8. 8. The battery cell of claim 7, wherein the dimension of the first segment in a direction perpendicular to the first end face is L1, and the dimension of the first side face in a direction perpendicular to the first end face is L2, satisfying 1 / 7≦L1 / L2≦1 / 5.

9. The battery cell of any one of claims 6 to 8, wherein the root segment is provided with a bend such that the adapter piece is parallel to the first end surface.

10. The battery cell according to any one of claims 1 to 9, wherein the protective film includes a protective film main body and a cover member, the protective film main body having an adhesive surface, the cover member covers a portion of the adhesive surface to form the non-adhesive region, and the portion of the adhesive surface not covered by the cover member forms the first adhesive region and the second adhesive region.

11. A battery comprising the battery cell according to any one of claims 1 to 10.

12. 11. A power consumption device comprising a battery cell according to any one of claims 1 to 10, the battery cell being for providing electrical energy.

13. A method for manufacturing a battery cell, comprising: providing an adapter piece; providing an electrode assembly including a body and a tab extending from the body, the tab including a root segment connected to the body and a connecting segment; providing a protective film including a first adhesive region, a second adhesive region, and a non-adhesive region located between the first adhesive region and the second adhesive region; connecting the connecting segment to the adapter piece, adhering the first adhesive area to the body, adhering the second adhesive area to the connecting segment, and covering the root segment with the non-adhesive area; A method for manufacturing a battery cell, comprising:

14. A battery cell manufacturing device comprising: a providing module for providing an adapter piece, providing an electrode assembly, and providing a protective membrane, the electrode assembly including a body and a tab extending from the body, the tab including a root segment connected to the body and a connecting segment, and the protective membrane including a first adhesive region, a second adhesive region, and a non-adhesive region located between the first adhesive region and the second adhesive region; an assembly module for connecting the connection segment to the adapter piece, adhering the first adhesive area to the body, adhering the second adhesive area to the connection segment, and covering the root segment with the non-adhesive area; Battery cell manufacturing equipment, including:

Images