Pole assembly, battery cell and battery pack

Abstract

The present application provides a pole assembly, a battery cell and a battery pack, which relate to the field of power battery technology. The pole assembly is used to connect with the pole tab to form a positive electrode or a negative electrode. The pole assembly includes a first connecting piece, a bracket assembly, a connecting post and an adapter assembly. The outer edge of the bracket assembly is provided with a snap-in groove, which is located on the side of the bracket assembly away from the pole tab. The first connecting piece is connected to the bus bar. The connecting post is arranged inside the bracket assembly, and the connecting post is respectively connected to the first connecting piece and the adapter assembly, and the adapter assembly is connected to the pole tab. The bracket assembly is provided in the snap-in groove, which is located on the side of the bracket assembly away from the pole tab. The first connecting piece is exposed in the snap-in groove, and the first connecting piece is connected to the adapter assembly through the connecting post. The adapter assembly is used to connect with the pole tab, so that when the battery cell is assembled into a battery pack, the bus bar and the first connecting piece can be connected inside the battery pack, which is convenient for assembly.

Description

Technical Field

[0001] The present application relates to the technical field of power batteries, and in particular to a pole assembly, a battery cell and a battery pack. Background Art

[0002] Energy conservation and emission reduction are the keys to the sustainable development of the automotive industry. Electric vehicles have become an important part of the sustainable development of the automotive industry due to their energy-saving and environmental protection advantages. For electric vehicles, battery technology advantages are an important factor in their development.

[0003] In the development of battery technology, the series and parallel connections of single cells in a power battery module are mostly achieved by laser welding an external bus bar to the single cell poles, thereby forming an electrical connection. However, since the external bus bar occupies a large space in the battery module, the assembly operation is not easy. Summary of the Invention

[0004] The purpose of this application is to provide a pole assembly, a battery cell and a battery pack that can be easily connected to a busbar, facilitating assembly.

[0005] To achieve the above objectives, this application adopts the following technical solutions:

[0006] In the first aspect, the present application provides a pole assembly, which is used to connect with the pole lug to form a positive or negative pole. The pole assembly includes a first connecting piece, a bracket assembly, a connecting column and an adapter assembly. The outer edge of the bracket assembly is provided with a snap-in groove, and the snap-in groove is located on the side of the bracket assembly away from the pole lug. The snap-in groove is configured to accommodate a structure of at least a portion of the first connecting piece, and the structure of this portion is used to connect to a bus. The connecting column is configured inside the bracket assembly, and one end of the connecting column is connected to the first connecting piece, and the other end thereof is connected to the adapter assembly, and the adapter assembly is connected to the pole lug.

[0007] In the above implementation process, the bracket assembly is arranged in the snap-in slot, which is located on the side of the bracket assembly away from the pole ear. The first connecting piece is exposed in the snap-in slot, and the first connecting piece is connected to the adapter assembly through the connecting column. The adapter assembly is used to connect with the pole ear, so that when the battery cell is assembled into a battery pack, the bus and the first connecting piece can be connected in the battery pack, which is conducive to assembly.

[0008] In some embodiments, the first connecting piece includes a first connecting body and a second connecting body, the first connecting body is configured inside the bracket assembly, the second connecting body is configured to be connected to the first connecting body, and the second connecting body is exposed in the snap-in slot.

[0009] In the above implementation process, the first connector and the second connector are connected to form a whole, and before the bracket assembly is set on the outer edge of the first connector, the first connector is first connected to the connecting column to facilitate the integrated molding of the first connecting piece and the bracket assembly. Since the second connector is exposed in the snap-in groove, the snap-in groove is located at the outer edge of the bracket assembly, which facilitates the subsequent connection of the second connector and the bus.

[0010] In some embodiments, when the electrode assembly serves as the positive electrode, the first connector is provided with an opening to form a fuse at an outer edge of the opening. By forming a fuse on the first connector, the safety of the product can be improved.

[0011] In some embodiments, the bracket assembly includes a first bracket, a cover plate and a second bracket, the first bracket is provided with the snap-in groove on the side facing away from the second bracket, the cover plate and the second bracket are connected to the first bracket through the connecting column, and the second bracket is located on the side of the cover plate facing away from the first bracket.

[0012] In the above implementation process, the cover plate and the second bracket can form a whole with the first bracket through the connecting column, and when the first connecting piece is connected to the pole ear, the bracket assembly can seal the adapter assembly and the pole ear, which is beneficial to the safe use of the battery cell.

[0013] In some embodiments, a accommodating cavity is provided on the side of the second bracket facing away from the cover plate, and a plurality of limiting ribs are provided in the accommodating cavity. The accommodating cavity is configured to accommodate the structure of at least a portion of the adapter assembly, and the structure of this portion is limited by the limiting ribs.

[0014] In the above implementation process, a limiting rib is set in the accommodating cavity, so that the adapter assembly is limited during the connection between the connecting column and the adapter assembly, which is beneficial to the assembly of the adapter assembly and the connecting column and improves its work efficiency.

[0015] In some embodiments, the pole assembly further includes a sealing ring, which is disposed on an outer edge of the connecting pole to form a seal with the first bracket, the cover plate, and the second bracket.

[0016] In some embodiments, the adapter assembly includes an adapter plate and a second connecting plate, the second connecting plate is configured to be connected to the connecting column, and the adapter plate is located on a side of the second connecting plate away from the connecting column and is connected to the second connecting plate.

[0017] In the above implementation process, the second connecting piece is connected to the first connecting piece through the connecting column, and the adapter piece is arranged on the side of the second connecting piece away from the connecting column, so that when the adapter piece is connected to the pole ear, the first connecting piece and the pole ear can be connected, thereby realizing the charging and discharging of the battery cell.

[0018] In a second aspect, the present application also provides a battery cell, comprising: a pole coil having pole tabs, the pole tabs being located at the left and right ends of the pole coil; and a pole assembly as described in any one of the above items, the adapter component of the pole assembly being configured to be connected to the pole tabs so that the pole assembly forms a positive electrode or a negative electrode.

[0019] In the above implementation process, pole ears are provided at the left and right ends of the pole coil, and the pole assembly is used to connect with the pole ears. When assembling the battery pack, the battery cells can be arranged in the battery pack first, and finally the bus and the pole assembly can be welded, so as to fully utilize the battery pack space and improve the energy density of the product.

[0020] In some embodiments, the battery cell further includes a battery housing configured to accommodate at least a portion of the pole roll.

[0021] Thirdly, the present application also provides a battery pack, comprising: a busbar, a limiting groove being provided on its outer edge; and a battery cell as described in any one of the above items, wherein a plurality of battery cells are provided, the snap-fitting grooves of the pole assembly of the battery cell are adapted to the limiting grooves, and the positive and negative electrodes of the battery cell are both connected to the busbar.

[0022] In the above implementation process, the busbar is provided with a limiting groove adapted to the clamping groove of the pole assembly, which facilitates the clamping of the busbar and the clamping groove, and then the busbar and the pole assembly can be welded, which is beneficial for assembly.

[0023] Other features and advantages of the present application will be described in the following description and, in part, will become apparent from the description or be understood by practicing the embodiments of the present application. The objectives and other advantages of the present application can be achieved and obtained through the structures particularly pointed out in the written description, claims, and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technical users in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 It is a structural schematic diagram of a pole assembly disclosed in an embodiment of the present application.

[0026] Figure 2 This is a front view of a pole assembly disclosed in an embodiment of the present application.

[0027] Figure 3 yes Figure 2 sectional view of .

[0028] Figure 4 This is a structural schematic diagram of a first connecting piece when a pole assembly forms a negative pole, as disclosed in an embodiment of the present application.

[0029] Figure 5 This is a schematic structural diagram of a first connecting piece when a pole assembly forms a positive electrode, as disclosed in an embodiment of the present application.

[0030] Figure 6 This is a structural schematic diagram of a first bracket of a pole assembly disclosed in an embodiment of the present application.

[0031] Figure 7 This is a schematic structural diagram of a second bracket of a pole assembly disclosed in an embodiment of the present application.

[0032] Figure 8 This is a schematic structural diagram of a second connecting piece of a pole assembly disclosed in an embodiment of the present application.

[0033] Figure 9 This is a schematic structural diagram of a battery cell disclosed in an embodiment of the present application.

[0034] Figure 10 This is a schematic structural diagram of a battery pack disclosed in an embodiment of the present application.

[0035] Figure 11 This is a schematic structural diagram of a busbar of a battery pack disclosed in an embodiment of the present application.

[0036] Reference numerals

[0037] 100. Pole assembly; 101. First connecting piece; 1011. First connecting body; 10111. Opening; 10112. Fuse; 1012. Second connecting body; 102. First bracket; 1021. Snap-in groove; 103. Cover plate; 104. Second bracket; 1041. Limiting rib; 105. Sealing ring; 106. Adapter plate; 107. Second connecting piece; 1071. Step surface; 108. Connecting column; 200. Battery cell; 300. Busbar; 301. Limiting groove; 302. Box. DETAILED DESCRIPTION

[0038] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0039] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application as claimed, but merely represents selected embodiments of the present application. All other embodiments derived by a user of ordinary skill in the art based on the embodiments in the present application without creative effort are also within the scope of protection of the present application.

[0040] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0041] In the description of this application, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is typically placed when in use. These terms are intended only to facilitate the description of this application and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0042] Furthermore, terms such as "horizontal" and "vertical" do not necessarily mean that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0043] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Users of ordinary skill in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0044] Example

[0045] Lithium-ion batteries are rechargeable batteries that rely primarily on the movement of lithium ions between the positive and negative electrodes. During charging, lithium ions are deintercalated from the positive electrode and then embedded in the negative electrode through the electrolyte, leaving the negative electrode in a lithium-rich state. The reverse occurs during discharge. In recent years, pure electric vehicles have become a key development direction for electric vehicles due to their ability to achieve true "zero emissions." Lithium-ion batteries, with their excellent performance, have become the ideal power source for this new generation of electric vehicles.

[0046] During the design process, the inventor discovered that the current mainstream power batteries are square-shell cells with poles at both ends. When the power battery is placed in the battery pack, the busbar and the poles need to be welded using welding devices. Due to the space limitations of the battery pack and the market demand for energy density, the reserved space between power batteries is relatively small. If conventional power battery assembly is used, it is difficult to perform laser welding between the busbar and the poles.

[0047] In view of this, if Figure 1-Figure 3 As shown, in the first aspect, the present application provides a pole assembly 100, which is used to connect with the pole ear to form a positive electrode or a negative electrode. The pole assembly 100 includes a first connecting piece 101, a bracket assembly, a connecting column 108 and an adapter assembly. The outer edge of the bracket assembly is provided with a snap-in groove 1021, and the snap-in groove 1021 is located on the side of the bracket assembly away from the pole ear. The snap-in groove 1021 is configured to accommodate a structure of at least a portion of the first connecting piece 101, and the structure of this portion is used to connect to the bus 300. The connecting column 108 is arranged inside the bracket assembly, and one end of the connecting column 108 is connected to the first connecting piece 101, and the other end thereof is connected to the adapter assembly, and the adapter assembly is connected to the pole ear.

[0048] For example, before designing the bracket assembly, it is first necessary to connect and fix the first connecting piece 101 and the connecting column 108, and finally place the whole formed by the first connecting piece 101 and the connecting column 108 into a specific device, and perform integral injection molding on it, so that the bracket assembly is covered on the first connecting piece 101; wherein the connection method between the first connecting piece 101 and the connecting column 108 can be riveting, that is, a mounting hole is provided on the first connecting piece 101, and the mounting hole is used to accommodate a part of the structure of the connecting column 108. Of course, in other embodiments, the connection method between the first connecting piece 101 and the connecting column 108 can also be welding, etc.

[0049] It should be noted that there are two pole assemblies 100, which are located on the left and right sides of the battery cell 200 respectively. When the pole assembly 100 is welded to the pole ear, the snap-in groove 1021 has an upward opening 10111, and the opening 10111 can be used to expose the first connecting piece 101 and weld the bus 300 to the first connecting piece 101.

[0050] In order to ensure good connectivity between the first connecting piece 101, the connecting column 108 and the adapter assembly, the dimensions of both ends of the connecting column 108 can be set to gradually shrink along the middle position, so that a snap-fit ​​groove 1021 is formed between the end of the connecting column 108 and the middle position, and the first connecting piece 101 and the second connecting piece 107 of the adapter assembly can be snap-fitted through the snap-fit ​​groove 1021.

[0051] In the above implementation process, the bracket assembly is arranged in the snap-in groove 1021, and the snap-in groove 1021 is located on the side of the bracket assembly away from the pole ear. The first connecting piece 101 is exposed in the snap-in groove 1021, and the first connecting piece 101 is connected to the adapter assembly through the connecting column 108. The adapter assembly is used to connect with the pole ear, so that when the battery cell 200 is assembled into a battery pack, the bus 300 can be connected to the first connecting piece 101 in the battery pack, which is conducive to assembly.

[0052] like Figure 4 As shown, the first connecting piece 101 includes a first connecting body 1011 and a second connecting body 1012. The first connecting body 1011 is disposed inside the bracket assembly, and the second connecting body 1012 is configured to be connected to the first connecting body 1011. The second connecting body 1012 is exposed in the clamping groove 1021. Exemplarily, the first connecting piece 101 can be bent, for example, the first connecting piece 101 is configured to be L-shaped to form the first connecting body 1011 and the second connecting body 1012, wherein the first connecting body 1011 is distributed in the vertical direction and the second connecting body 1012 is distributed in the left and right direction, so that when the bracket assembly is covered on the first connecting piece 101, the second connecting body 1012 can be protruded on the side of the bracket assembly away from the terminal lug, so as to facilitate welding of the second connecting body 1012 to the busbar 300.

[0053] In the above implementation process, the first connector 1011 and the second connector 1012 are connected to form a whole, and before the bracket assembly is set on the outer edge of the first connector 1011, the first connector 1011 is first connected to the connecting column 108 to facilitate the integrated molding of the first connecting piece 101 and the bracket assembly. Since the second connector 1012 is exposed in the snap-in groove 1021, the snap-in groove 1021 is located at the outer edge of the bracket assembly, which facilitates the subsequent connection of the second connector 1012 with the bus 300.

[0054] like Figure 5 As shown, when the terminal assembly 100 is a positive electrode, the first connector 1011 is provided with an opening 10111, with a fuse 10112 formed at the outer edge of the opening 10111. It should be noted that the opening 10111 can be square or other shapes, and the size of the opening 10111 is not particularly limited and can be set according to the actual situation of the battery cell 200. By forming the fuse 10112 on the first connector 1011, the safety of the product can be improved.

[0055] like Figure 3 、 Figure 6 and Figure 7 As shown, the bracket assembly includes a first bracket 102, a cover plate 103 and a second bracket 104. The first bracket 102 is provided with the snap-in groove 1021 on the side facing away from the second bracket 104. The cover plate 103 and the second bracket 104 are connected to the first bracket 102 through the connecting column 108. The second bracket 104 is located on the side of the cover plate 103 facing away from the first bracket 102.

[0056] Exemplarily, when the pole assembly 100 is welded to the pole tab to form a negative pole, the first bracket 102 and the second bracket 104 are both made of insulating material; when the pole assembly 100 is welded to the pole tab to form a positive pole, the first bracket 102 is made of conductive plastic and the second bracket 104 is made of plastic.

[0057] It can be understood that the structure of the first bracket 102 can be formed as an integral body by connecting the first connecting piece 101 and the connecting column 108 as a whole, and the first bracket 102 can be set to be L-shaped, and the snap-in groove 1021 is located at the outer edge of the first bracket 102. At the same time, a number of limiting columns are arranged at intervals around the opening 10111 of the snap-in groove 1021, and the bus 300 can be limited by the limiting columns.

[0058] In the above implementation process, the cover plate 103 and the second bracket 104 can form a whole with the first bracket 102 through the connecting column 108, and when the first connecting piece 101 is connected to the pole ear, the bracket assembly can form a seal for the adapter assembly and the pole ear, thereby facilitating the safe use of the battery cell 200.

[0059] Please refer to Figure 7 A accommodating cavity is provided on the side of the second bracket 104 facing away from the cover plate 103, and a plurality of limiting ribs 1041 are provided in the accommodating cavity. The accommodating cavity is configured to accommodate a structure of at least a part of the adapter assembly, and the structure of this part is limited by the limiting ribs 1041.

[0060] In the above implementation process, a limiting rib 1041 is set in the accommodating cavity, so that during the connection between the connecting column 108 and the adapter component, the adapter component is limited, which is beneficial to the assembly of the adapter component and the connecting column 108 and improves its work efficiency.

[0061] In some embodiments, the pole assembly 100 further includes a sealing ring 105 , which is disposed on an outer edge of the connecting post 108 to form a seal with the first bracket 102 , the cover plate 103 , and the second bracket 104 .

[0062] like Figure 8 As shown, the adapter assembly includes an adapter plate 106 and a second connecting plate 107. The second connecting plate 107 is configured to be connected to the connecting post 108. The adapter plate 106 is located on a side of the second connecting plate 107 away from the connecting post 108 and is connected to the second connecting plate 107. Exemplarily, a stepped surface 1071 is provided on the second connecting plate 107, and the stepped surface 1071 is used to mate with the connecting post 108. The adapter plate 106 is welded to the second connecting plate 107, and the side of the adapter plate 106 away from the second connecting plate 107 is used to be welded to the tab. The structure of the adapter plate 106 is not particularly limited.

[0063] In the above implementation process, the second connecting piece 107 is connected to the first connecting piece 101 through the connecting column 108, and the adapter piece 106 is arranged on the side of the second connecting piece 107 away from the connecting column 108, so that when the adapter piece 106 is connected to the pole ear, the first connecting piece 101 can be connected to the pole ear, thereby realizing the charging and discharging of the battery cell 200.

[0064] like Figure 9As shown, in the second aspect, the present application also provides a battery cell 200, comprising: a pole coil having pole ears, the pole ears being located at the left and right ends of the pole coil; and a pole assembly 100 as described above, the adapter component of the pole assembly 100 being configured to be connected to the pole ears so that the pole assembly 100 forms a positive electrode or a negative electrode; the battery cell 200 also includes a battery case, which is configured as a structure for accommodating at least a portion of the pole coil.

[0065] In the above implementation process, pole ears are provided at the left and right ends of the pole coil, and the pole assembly 100 is used to connect with the pole ears. When assembling the battery pack, the battery cell 200 can be arranged in the battery pack first, and finally the bus 300 and the pole assembly 100 are welded, so as to fully utilize the battery pack space and improve the energy density of the product.

[0066] like Figure 10-11 As shown, for the third convenience, the present application also provides a battery pack, including: a bus 300, a limiting groove 301 is provided on its outer edge; and the battery cell 200 as described above, wherein a plurality of battery cells 200 are provided, and the snap-in groove 1021 of the pole assembly 100 of the battery cell 200 is adapted to the limiting groove 301, and the positive and negative poles of the battery cell 200 are both connected to the bus 300.

[0067] Exemplarily, the battery pack further includes a housing 302, wherein a plurality of battery cells 200 are disposed within the housing 302, wherein the housing 302 can support the battery, and can also be supported by a liquid cooling plate or other means, which are not specifically limited herein. The battery pack can be used to power electrical equipment, such as an operating power supply for the electrical equipment, etc. The electrical equipment can be an electric toy, an electric tool, an electric vehicle, an electric vehicle, and a spacecraft, etc. When the electrical equipment is a vehicle, the vehicle 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, etc. The battery pack is disposed inside the vehicle, and the battery pack can be disposed at the bottom, head, or tail of the vehicle.

[0068] In the above implementation process, the busbar 300 is provided with a limiting groove 301 adapted to the snap-fit ​​groove 1021 of the pole assembly 100, which facilitates the snap-fitting of the busbar 300 with the snap-fit ​​groove 1021, and then the busbar 300 and the pole assembly 100 can be welded, which is beneficial for assembly.

[0069] The foregoing description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for users skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A pole assembly, characterized in that: The pole assembly is used to connect with the pole tab to form a positive electrode or a negative electrode. The pole assembly includes a first connecting piece, a bracket assembly, a connecting post and an adapter assembly. The outer edge of the bracket assembly is provided with a snap-in groove, the snap-in groove is located on the side of the bracket assembly away from the pole tab, the snap-in groove is configured to accommodate at least a portion of the first connecting piece, and the structure of this portion is used to connect with the busbar. The connecting post is arranged inside the bracket assembly, and one end of the connecting post is connected to the first connecting piece, and the other end thereof is connected to the adapter assembly, and the adapter assembly is connected to the pole tab; The clamping slot has an opening facing upward, and the opening is used to expose the first connecting piece.

2. The pole assembly according to claim 1, characterized in that: The first connecting piece includes a first connecting body and a second connecting body. The first connecting body is configured inside the bracket assembly. The second connecting body is configured to be connected to the first connecting body. The second connecting body is exposed in the clamping groove.

3. The pole assembly according to claim 2, characterized in that: When the pole assembly becomes the positive pole, the first connector is provided with an opening to form a fuse at an outer edge of the opening.

4. The pole assembly according to claim 1, characterized in that: The bracket assembly includes a first bracket, a cover plate and a second bracket. The first bracket is provided with the snap-in groove on the side facing away from the second bracket. The cover plate and the second bracket are connected to the first bracket through the connecting column. The second bracket is located on the side of the cover plate facing away from the first bracket.

5. The pole assembly according to claim 4, characterized in that: A accommodating cavity is provided on the side of the second bracket facing away from the cover plate, and a plurality of limiting ribs are provided in the accommodating cavity. The accommodating cavity is configured to accommodate the structure of at least a part of the adapter assembly, and the structure of this part is limited by the limiting ribs.

6. The pole assembly according to claim 4, characterized in that: The pole assembly further includes a sealing ring, which is disposed on an outer edge of the connecting column and is used to form a seal with the first bracket, the cover plate, and the second bracket.

7. The pole assembly according to claim 1, characterized in that: The adapter assembly includes an adapter plate and a second connecting plate, the second connecting plate is configured to be connected to the connecting column, and the adapter plate is located on a side of the second connecting plate away from the connecting column and is connected to the second connecting plate.

8. A battery cell, characterized in that: include: a pole coil having pole lugs located at the left and right ends of the pole coil; and The pole assembly according to any one of claims 1 to 7, wherein the adapter assembly of the pole assembly is configured to be connected to the tab so that the pole assembly forms a positive electrode or a negative electrode.

9. The battery cell according to claim 8, characterized in that The battery cell further includes a battery case configured as a structure for accommodating at least a portion of the pole roll.

10. A battery pack, characterized in that: include: The busbar has a limiting groove on its outer edge; and The battery cell according to any one of claims 8 to 9, wherein a plurality of the battery cells are provided, the snap-fitting groove of the pole assembly of the battery cell is adapted to the limiting groove, and the positive and negative electrodes of the battery cell are both connected to the busbar.

Images