Insulating part, cover plate assembly and battery monomer

Abstract

The utility model provides an insulating part, a cover plate assembly and a battery monomer, and relates to the technical field of batteries. The insulating part is applied to a single battery and comprises a body, the body is provided with a first surface, two grooves are formed in the first surface at intervals, and a through hole is formed in the bottom of each groove; wherein each groove and the through hole communicated with the groove are configured to be matched with the electrode output parts of the battery monomers, and the electrode output parts in the two grooves are respectively a positive electrode output part and a negative electrode output part. According to the battery, the two grooves are formed in the insulating part, and the two grooves are matched with the positive electrode output part and the negative electrode output part of the single battery body respectively, so that the insulating isolation requirement between the two electrode output parts of the single battery body and the cover plate can be met through one-time insulating part assembling. Therefore, the number of parts of the battery monomer can be reduced, and the assembly steps of the battery monomer are simplified, so that the assembly efficiency of the battery monomer can be improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to an insulating member, a cover plate assembly and a battery cell. Background Art

[0002] The battery cell includes a shell, a cover plate assembly and an electrode assembly. Among them, the cover plate assembly includes a cover plate, a pole, an insulating member that insulates the pole from the outer surface of the cover plate, and a lower plastic that insulates the inner surface of the cover plate from the core package. In the related art, in order to facilitate the output of the positive and negative poles on the same side of the battery cell, the positive pole and the negative pole are arranged on the same cover plate. Correspondingly, it is necessary to configure a positive insulating member and a negative insulating member respectively to insulate and isolate the positive pole and the negative pole from the cover plate. During assembly, the positive insulating member and the negative insulating member need to be assembled to the cover plate in sequence. In this way, not only are there more battery cell parts, but there are also more installation steps involved, which leads to lower battery cell assembly efficiency. Utility Model Content

[0003] The present application provides an insulating member, a cover plate assembly and a battery cell, which can improve the assembly efficiency of the battery cell.

[0004] In a first aspect, the present application provides an insulating member, which is applied to a battery cell. The insulating member includes a body, the body having a first surface, two grooves arranged at intervals on the first surface, and a through hole provided at the bottom of each groove; wherein each groove and the through hole connected thereto are configured to cooperate with the electrode output member of the battery cell, and the electrode output members in the two grooves are respectively a positive electrode output member and a negative electrode output member.

[0005] In one embodiment, the insulating member further includes an isolation block protruding from the first surface, and the isolation block is located between the two grooves.

[0006] In one embodiment, a weight-reducing groove is provided on a side of the isolation block facing away from the first surface.

[0007] In one embodiment, the weight-reducing groove is a through groove, the extending direction of the through groove is parallel to the first surface, and the two grooves are respectively located on both sides of the extending direction of the through groove.

[0008] In one embodiment, a first plug-in structure is provided at the bottom of each groove, and the first plug-in structure is configured to be plugged with the electrode output member of the battery cell matched therewith.

[0009] In one embodiment, the first plug-in structure is a column, and the column is configured to be inserted into the positive output member of the battery cell.

[0010] In one embodiment, the body further has a second surface disposed opposite to the first surface, and a second plug-in structure is disposed on the second surface. The second plug-in structure is configured to be plugged with a cover plate of the battery cell.

[0011] In one embodiment, the second plug-in structure includes an insert ring, one end of the insert ring is connected to the second surface, and the other end is configured to be inserted into the cover plate of the battery cell.

[0012] In one embodiment, the second plug-in structure further includes a plurality of plug-in blocks, which are spaced apart around the circumference of the plug-in ring, and the adjacent two side walls of the plug-in blocks are respectively connected to the second surface and the outer circumference of the plug-in ring, and the side of the plug-in block facing away from the second surface is configured to be inserted into the cover plate of the battery cell.

[0013] In one embodiment, there are two second plug-in structures, and the two second plug-in structures are respectively arranged in a one-to-one correspondence with the two grooves.

[0014] In one embodiment, two electrode mounting holes are provided on the cover plate of the battery cell, and the two second plug-in structures are configured to be inserted into the two mounting holes respectively; wherein the two mounting holes are configured to cooperate with the positive output component and the negative output component respectively.

[0015] In the second aspect, the present application provides a cover plate assembly, which includes a cover plate, a lower plastic part, two current collecting parts with opposite polarities, two electrode output parts with opposite polarities and the aforementioned insulating part; the cover plate is provided with two mounting holes; the lower plastic part is provided on one side of the cover plate; the insulating part is provided on the other side of the cover plate, and the notch of the groove is provided away from the cover plate, and the two through holes are respectively connected to the two mounting holes; the current collecting parts are both located on the side of the lower plastic part away from the cover plate; one end of the two electrode output parts is respectively connected to the current collecting parts of the corresponding polarity, and the other end is respectively matched with a groove, and the middle part is passed through the corresponding through hole and the mounting hole.

[0016] In one embodiment, the electrode output component includes a pole and a pressing block, the pressing block cooperates with the groove, one end of the pole is connected to the positive electrode current collector, and the other end passes through the mounting hole and the through hole and is connected to the pressing block.

[0017] In a third aspect, the present application provides a battery cell comprising a shell, an electrode assembly and the aforementioned cover assembly; the shell has a receiving cavity; the electrode assembly is arranged in the receiving cavity; the cover is covered at the opening of the shell to close the receiving cavity, and the two current collecting parts are respectively connected to the positive electrode sheet and the negative electrode sheet of the electrode assembly.

[0018] Beneficial effects of the embodiments of the present application:

[0019] In this application, by providing two grooves on an insulating member, and aligning them with the positive and negative output members of the battery cell, respectively, the insulation isolation requirements between the two electrode output members and the cover plate of the battery cell can be met through a single insulating member assembly. This reduces the number of battery cell components, simplifies the assembly steps of the battery cell, and improves battery cell assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 This is a schematic structural diagram of a first insulating member provided in an embodiment of the present application;

[0022] Figure 2 is a schematic structural diagram of a second insulating member provided in an embodiment of the present application;

[0023] Figure 3 yes Figure 2 a side view of the insulating member shown;

[0024] Figure 4 This is a schematic structural diagram of a third insulating member provided in an embodiment of the present application;

[0025] Figure 5 is a schematic structural diagram of an insulating member from another perspective provided by an embodiment of the present application;

[0026] Figure 6 is a structural schematic diagram of an insulating member from another perspective provided by an embodiment of the present application;

[0027] Figure 7 is an exploded view of a cover plate assembly provided in an embodiment of the present application;

[0028] Figure 8 is a cross-sectional view of a cover plate assembly provided in an embodiment of the present application;

[0029] Figure 9 yes Figure 8 Enlarged view of point A in the middle;

[0030] Figure 10 It is a schematic structural diagram of a battery cell provided in an embodiment of the present application.

[0031] Description of reference numerals:

[0032] 001-insulation parts;

[0033] 011-body; 111-first surface; 112-groove; 113-through hole; 114-second surface;

[0034] 012-Isolation block; 121-Weight reduction slot;

[0035] 013-first plug-in structure;

[0036] 014-second plug-in structure; 141-plug ring; 142-plug block;

[0037] 002-cover assembly; 021-cover; 212-mounting hole; 022-lower plastic part; 023-current collector; 024-electrode output part; 241-pole; 242-pressing block; 025-sealing ring;

[0038] 003-battery cell; 031-casing. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.

[0040] The terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the specified features. In the description of this application, "plurality" means two or more, unless otherwise specifically specified.

[0041] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections, electrical connections, or mutual communication; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0042] The terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0043] See also Figure 1 , Figure 1 It is a structural schematic diagram of an insulating member 001 provided in an embodiment of the present application. In a first aspect, an embodiment of the present application provides an insulating member 001, which is applied to a battery cell.

[0044] Specifically, the insulating member 001 includes a main body 011, which has a first surface 111, and two grooves 112 are arranged on the first surface 111 at intervals, and a through hole 113 is provided at the bottom of each groove 112; wherein, each groove 112 and the through hole 113 connected thereto are configured to cooperate with the electrode output member 024 of the battery cell, and the electrode output members 024 in the two grooves 112 are respectively the positive electrode output member and the negative electrode output member.

[0045] The electrode output element 024 can be an integrally formed T-shaped terminal or a combination of a terminal and a pressure block. One end of the positive and negative electrode output elements are connected to the positive and negative current collector plates, respectively, and the other ends are connected to the positive and negative electrode connection bars, respectively, to output the internal current of the battery cell.

[0046] Exemplarily, the insulating member 001 is a plastic member.

[0047] It can be understood that the shape and size of the groove 112 are consistent with the shape and size of the part on the electrode output component 024 that cooperates with it. For example, the part on the electrode output component 024 that cooperates with it is a cubic block structure, or a cylindrical structure, or a polygonal prism structure. Correspondingly, the groove 112 is a rectangular groove, a cylindrical groove, and a polygonal groove in sequence.

[0048] In this embodiment, two grooves 112 are provided on an insulating member 001, and the two grooves 112 respectively mate with the positive and negative output members of the battery cell. Thus, a single assembly of the insulating member 001 can meet the insulation isolation requirements between the two electrode output members 024 of the battery cell and the cover plate 021. This reduces the number of battery cell components, simplifies the assembly steps, and improves battery cell assembly efficiency.

[0049] See also Figure 2 , Figure 21 is a schematic structural diagram of another insulating member 001 provided in an embodiment of the present application. In one embodiment, the insulating member 001 further includes an isolation block 012 . The isolation block 012 is protruded from the first surface 111 and is located between the two grooves 112 .

[0050] Specifically, see Figure 3 , Figure 3 yes Figure 2 In the side view of the insulating member 001 shown, in the direction perpendicular to the first surface 111 , the height dimension of the isolation block 012 is H1 , and the height dimension of the body 011 is H0 , which satisfies: 45% H0 ≤ H1 ≤ 65% H0 .

[0051] In this embodiment, by providing an isolation block 012 between the two grooves 112, the electrical isolation between the positive and negative output components within the two grooves 112 is enhanced, thereby effectively preventing accidental contact between the positive and negative output components and thus preventing short circuits. This effectively improves the reliability of the battery cell.

[0052] See also Figure 4 , Figure 4 This is a schematic diagram of the structure of a third type of insulating member 001 provided in an embodiment of the present application. In one embodiment, a weight-reducing groove 121 is provided on the side of the isolation block 012 facing away from the first surface 111. This reduces the material used for the isolation block 012, thereby controlling the material cost of the insulating member 001 and, in turn, lowering the manufacturing cost of the battery cell.

[0053] See also Figure 4 In one embodiment, the weight-reducing groove 121 is a through groove extending parallel to the first surface 111, with two recesses 112 located on either side of the through groove. This provides a buffer space for the electrode output member 024 to expand due to heat, preventing two electrode output members 024 of opposite polarity from abutting each other after thermal expansion. This reduces the stress on related components and improves the reliability of the battery cell.

[0054] See also Figure 1 In one embodiment, a first plug-in structure 013 is provided at the bottom of each groove 112 , and the first plug-in structure 013 is configured to be plugged with the electrode output member 024 of the battery cell that cooperates with it.

[0055] In this embodiment, by providing a first plugging structure 013 plugged into the electrode output member 024 of the battery cell, the area of ​​the connection surface between the electrode output member 024 and the insulating member 001 can be increased, thereby improving the reliability of the connection between the electrode output member 024 and the insulating member 001.

[0056] See also Figure 1In one embodiment, the first plug-in structure 013 is a column, which is configured to be inserted into the electrode output member 024 of the battery cell. In this way, the first plug-in structure 013 is simple, thereby reducing its molding difficulty and facilitating manufacturing.

[0057] Specifically, four first plug-in structures 013 are provided in each groove 112. Each groove 112 is a rectangular groove, and the four plug-in structures are respectively located at the four corners of the groove 112.

[0058] See also Figure 5 , Figure 5 The embodiment of the present application provides a structural diagram of the insulating member 001 from another perspective. In one embodiment, the body 011 further has a second surface 114 disposed opposite to the first surface 111. The second surface 114 is provided with a second plug-in structure 014. The second plug-in structure 014 is configured to plug into the cover plate 021 of the battery cell.

[0059] In this embodiment, by providing a second plugging structure 014 plugged into the cover plate 021 of the battery cell, the area of ​​the connection surface between the cover plate 021 and the insulating member 001 can be increased, thereby improving the reliability of the connection between the cover plate 021 and the insulating member 001.

[0060] See also Figure 5 In one embodiment, the second plug-in structure 014 includes an insert ring 141. One end of the insert ring 141 is connected to the second surface 114, and the other end is configured to be inserted into the cover plate 021 of the battery cell. This creates an axisymmetric structure between the insulating member 001 and the cover plate 021, ensuring uniform force distribution between the insulating member 001 and the cover plate 021. This improves the force distribution at the mating portion, thereby enhancing the reliability of the battery cell.

[0061] See also Figure 6 , Figure 6 This is a schematic diagram of the structure of the insulating member 001 from another perspective provided in an embodiment of the present application. In one embodiment, the second plug-in structure 014 further includes a plurality of plug-in blocks 142. These plug-in blocks 142 are spaced apart around the circumference of the insert ring 141, with adjacent side walls of the plug-in blocks 142 respectively connected to the second surface 114 and the outer circumference of the insert ring 141. The side of the plug-in block 142 facing away from the second surface 114 is configured to be inserted into the cover plate 021 of the battery cell.

[0062] In one embodiment, there are two second plug-in structures 014 , and the two second plug-in structures 014 are respectively disposed in a one-to-one correspondence with the two grooves 112 .

[0063] In one embodiment, the battery cell cover 021 is provided with two mounting holes 212, and the two second plug-in structures 014 are configured to be respectively inserted into the two mounting holes 212. The two mounting holes 212 are configured to respectively cooperate with the positive output component and the negative output component.

[0064] In this embodiment, by plugging the second plug-in structure 014 into the mounting hole 212 on the cover plate 021, there is no need to provide an additional slot hole on the cover plate 021 for plugging with the second plug-in structure 014, thereby reducing the difficulty of molding the cover plate 021 and improving the manufacturing efficiency of the cover plate 021.

[0065] See also Figure 7 and Figure 8 , Figure 7 is an exploded view of the cover assembly 002 provided in an embodiment of the present application. Figure 8 It is a cross-sectional view of the cover assembly 002 provided in an embodiment of the present application. Accordingly, an embodiment of the present application also provides a cover assembly 002. The cover assembly 002 includes a cover 021, a lower plastic part 022, two current collecting parts 023 with opposite polarities, two electrode output parts 024 with opposite polarities and the aforementioned insulating part 001. The cover 021 is provided with two mounting holes 212. The lower plastic part 022 is provided on one side of the cover 021. The insulating part 001 is provided on the other side of the cover 021, and the notch of the groove 112 is provided away from the cover 021, and the two through holes 113 are respectively connected to the two mounting holes 212. The current collecting parts 023 are both located on the side of the lower plastic part 022 away from the cover 021. One end of the two electrode output members 024 is connected to the current collecting member 023 of the corresponding polarity, and the other end is matched with a groove 112 , and the middle part thereof is passed through the corresponding through hole 113 and the mounting hole 212 .

[0066] It can be understood that the cover assembly 002 further includes a sealing ring 025, which is disposed in the mounting hole 212 and seals the fitting gap between the mounting hole 212 and the electrode output member 024. Figure 9 As shown, Figure 9 yes Figure 8 Enlarged view of point A in the middle.

[0067] Among them, the two current collectors 023 with opposite polarities are respectively the positive current collector 023 connected to the positive electrode sheet and the negative current collector 023 connected to the negative electrode sheet; correspondingly, the two electrode output members 024 with opposite polarities are respectively the positive output member connected to the positive current collector 023 and the negative output member connected to the negative current collector 023.

[0068] In this embodiment, by using the aforementioned insulating member 001, the two grooves 112 can respectively mate with the positive and negative output members of the battery cell. Thus, the insulation isolation requirements between the two electrode output members 024 of the battery cell and the cover plate 021 can be met through a single assembly of the insulating member 001. This reduces the number of battery cell components, simplifies the assembly steps of the cover plate assembly 002, and improves the assembly efficiency of the cover plate assembly 002.

[0069] In one embodiment, the electrode output member 024 includes a post 241 and a pressing block 242, which fits into the groove 112. One end of the post 241 is connected to the positive current collector 023, and the other end passes through the mounting hole 212 and the through hole 113 and then connects to the pressing block 242.

[0070] In this way, during assembly, the pole 241 is first welded to the current collector 023, and then the side of the pole 241 away from the current collector 023 is passed through the mounting hole 212 and the through hole 113 and welded to the pressing block 242. This can avoid interference or obstruction of the cover plate 021 when welding the current collector 023 to the pole 241, thereby improving the ease of welding between the pole 241 and the current collector 023.

[0071] In one embodiment, the current collector 023 has a C-shaped structure, with one side configured to connect to the electrode assembly of the battery cell and the other side connected to the corresponding electrode output member 024. This allows the current collecting length of the current collector 023 to be controlled, thereby reducing the internal resistance of the cap plate assembly 002 and improving the current handling capacity of the cap plate assembly 002.

[0072] See also Figure 10 , Figure 10 Figure 1 is a schematic diagram of the structure of a battery cell 003 provided in an embodiment of the present application. Accordingly, the present application provides a battery cell 003 comprising a housing 031, an electrode assembly, and the aforementioned cover plate 021 assembly 002. Housing 031 has a receiving cavity. The electrode assembly is disposed within the receiving cavity. Cover plate 021 fits over the opening of housing 031 to seal the receiving cavity. Two current collectors 023 are connected to the positive and negative electrode sheets of the electrode assembly, respectively.

[0073] It can be understood that the electrode assembly includes a positive electrode sheet, a separator and a negative electrode sheet stacked in sequence.

[0074] Optionally, the battery cell 003 is a cylindrical battery with an outer diameter of 30 mm to 60 mm, for example, 46 mm. The height of the electrode output member 024 beyond the cover plate 021 can be 2 mm to 4.5 mm. The area of ​​the electrode output member 024 for welding with the connecting bar can be 100 mm. 2 ~300mm 2 .

[0075] In addition, in cylindrical batteries, the electrode assembly includes a positive electrode sheet, a separator, and a negative electrode sheet that are stacked and wound in sequence. It is understood that in order to ensure that the positive and negative tabs of the wound electrode assembly are located on either side of the end face of the electrode assembly without interfering with each other, the tabs of the positive and negative electrodes are formed by die-cutting. This allows the tabs of the positive and negative electrodes to cross, thereby forming a layout structure in which the positive and negative tab regions are located on either side of the end face of the electrode assembly during winding.

[0076] It can be understood that the negative electrode current collector 023 is made of copper, and its thickness can be 0.3 mm to 1 mm; the positive electrode current collector 023 is made of aluminum, and its thickness can be 0.2 mm to 1.5 mm.

[0077] In addition, after the cylindrical battery adopts the positive and negative poles output at the same end, an insulating support is provided between the electrode assembly and the bottom wall of the accommodating cavity, and a coding glue is provided on the outer peripheral surface of the electrode assembly.

[0078] In this embodiment, by using the aforementioned cover plate 021 assembly 002, the two grooves 112 can respectively mate with the positive and negative output components of the battery cell 003. This allows the insulation isolation requirements between the two electrode output components 024 of the battery cell 003 and the cover plate 021 to be met through assembly with a single insulating member 001. This reduces the number of components in the battery cell 003, simplifies the assembly steps for the battery cell 003, and improves the assembly efficiency of the battery cell 003.

[0079] In addition, compared with the structure in which the positive and negative electrodes are output from the two ends of the battery cell 003 respectively, in the embodiment of the present application, by outputting the positive and negative electrodes at the same end, the cover plate 021 of one of the electrodes can be omitted, thereby further reducing the number of components of the battery cell 003 to control its manufacturing cost; and, by outputting the positive and negative electrodes at the same end, the length of the output row of the battery module composed of the battery cell 003 can also be shortened to improve the current flow capacity; at the same time, the positive and negative electrode current collectors 023 and the positive and negative electrode output components can also share the same height space to control the volume of the battery cell 003 and improve the space utilization within the battery cell 003.

[0080] The above is a detailed introduction to the embodiments of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. At the same time, for those skilled in the art, based on the ideas of the present application, there may be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. An insulating member, applied to a battery cell, characterized in that: The insulating member includes a body having a first surface, two grooves are arranged at intervals on the first surface, and a through hole is arranged at the bottom of each groove; Each of the grooves and the through hole communicating therewith are configured to cooperate with the electrode output member of the battery cell, and the electrode output members in the two grooves are respectively a positive electrode output member and a negative electrode output member.

2. The insulating member according to claim 1, wherein The insulating member further includes an isolation block protruding from the first surface and located between the two grooves.

3. The insulating member according to claim 2, wherein: A weight-reducing groove is provided on a side of the isolation block facing away from the first surface.

4. The insulating member according to claim 3, wherein: The weight-reducing groove is a through groove, the extension direction of the through groove is parallel to the first surface, and the two grooves are respectively located on both sides of the extension direction of the through groove.

5. The insulating member according to any one of claims 1 to 4, characterized in that: A first plug-in structure is provided at the bottom of each groove, and the first plug-in structure is configured to be plugged with the electrode output component of the battery cell matched therewith.

6. The insulating member according to claim 5, wherein: The first plug-in structure is a column, and the column is configured to be inserted into the electrode output member of the battery cell.

7. The insulating member according to any one of claims 1 to 4, characterized in that: The body further has a second surface disposed opposite to the first surface. The second surface is provided with a second plug-in structure configured to be plugged with the cover plate of the battery cell.

8. The insulating member according to claim 7, wherein: The second plug-in structure includes an insert ring, one end of which is connected to the second surface, and the other end of which is configured to be inserted into the cover plate of the battery cell.

9. The insulating member according to claim 8, wherein The second plug-in structure also includes a plurality of plug-in blocks, which are arranged at intervals around the circumference of the plug-in ring, and the adjacent two side walls of the plug-in blocks are respectively connected to the second surface and the outer circumference of the plug-in ring, and the side of the plug-in block facing away from the second surface is configured to be inserted into the cover plate of the battery cell.

10. The insulating member according to claim 7, wherein There are two second plug-in structures, and the two second plug-in structures are arranged in a one-to-one correspondence with the two grooves.

11. The insulating member according to claim 7, wherein Two mounting holes are provided on the cover plate of the battery cell, and the two second plug-in structures are configured to be respectively inserted into the two mounting holes, wherein the two mounting holes are configured to cooperate with the positive output component and the negative output component respectively.

12. A cover plate assembly, characterized in that: include: The cover plate is provided with two mounting holes; a lower plastic part, arranged on one side of the cover; The insulating member according to any one of claims 1 to 11, arranged on the other side of the cover plate, the notch of the groove is arranged away from the cover plate, and the two through holes are respectively connected to the two mounting holes; Two current collecting members with opposite polarities are both located on a side of the lower plastic member facing away from the cover plate; Also, two electrode output members with opposite polarities, one end of each of the electrode output members is connected to the current collecting member of the corresponding polarity, the other end is respectively matched with one of the grooves, and the middle part thereof is passed through the corresponding through hole and the mounting hole.

13. The cover plate assembly according to claim 12, wherein: The electrode output component includes a pole and a pressing block. The pressing block cooperates with the groove. One end of the pole is connected to the current collector, and the other end passes through the mounting hole and the through hole and is connected to the pressing block.

14. A battery cell, characterized in that: include: a housing having a receiving cavity; an electrode assembly, disposed in the accommodating cavity; And, according to the cover plate assembly as described in claim 12 or 13, the cover plate is covered on the opening of the shell to close the accommodating cavity, and the two current collecting members are respectively connected to the positive electrode sheet and the negative electrode sheet of the electrode assembly.

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