Battery cell and battery
By bonding the tabs to the protrusions and bending them into the receiving grooves in the battery cell, the problem of excessive space occupied by the tabs and PCB board is solved, thereby improving the energy density and capacity of the battery.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-16
- Publication Date
- 2026-03-10
AI Technical Summary
In traditional batteries, the tabs and PCB board occupy too much battery space, affecting the battery's energy density and capacity.
By attaching the tabs to the protrusions and housing the circuit board in the receiving groove, electrical connection is achieved by utilizing the bendable characteristics of the tabs, avoiding multiple folds and reducing the space occupied by the tabs and circuit board.
This improves the energy density and capacity of individual battery cells, meeting the needs of large-capacity batteries.
Smart Images
Figure CN223986615U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of battery technology, and more particularly to a battery cell and a battery. Background Technology
[0002] In the battery manufacturing process, the PCB board is usually electrically connected to the electrode assembly via tabs. After the free end of the PCB board is connected to the tab, the PCB board is placed in the deep pit of the electrode assembly by folding the tab. In traditional batteries, the tab and PCB board often occupy too much battery space, which will affect the energy density and battery capacity of the battery. Utility Model Content
[0003] In view of this, the purpose of this application is to overcome the shortcomings of the prior art and provide a battery cell that can improve the energy density of the battery cell.
[0004] This application also provides a battery.
[0005] To achieve the above objectives, the technical solution adopted in this application is as follows:
[0006] According to a first aspect embodiment of the present application, the battery cell has a first direction and includes: an electrode assembly, the electrode assembly including a cell and a tab, the cell including a body and a protrusion, the protrusion being disposed at one end of the body along the first direction and protruding from the body along the first direction to define a receiving groove between the protrusion and the body, the tab being adhered to the protrusion and at least partially protruding from the protrusion in a direction away from the body along the first direction; and a circuit board, housed in the receiving groove, wherein the tab protruding from the protrusion is bendable at all points and the bending direction of the tab is towards the receiving groove, so that the circuit board is connected to the tab.
[0007] The battery cell of this application has the following advantages:
[0008] In the battery cell of this application, the tab can be bonded to the protrusion to achieve electrical connection between the tab and the cell. At the same time, the circuit board can be housed in the receiving groove to reduce the battery space occupied by the circuit board. Furthermore, since the tab protrudes from the protrusion and can be bent at various points, and the bending direction of the tab is towards the receiving groove to connect the circuit board and the tab, the circuit board can be connected to the tab by bending the tab. At the same time, the tab can be avoided by folding it multiple times, thereby reducing the battery space occupied by the tab and improving the energy density of the battery cell.
[0009] According to the battery cell of the first aspect of this application, the electrode assembly further includes a conductive adhesive layer, the tab is connected to the protrusion through the conductive adhesive layer, the protrusion has a peak surface at one end away from the body along the first direction, and the conductive adhesive layer is located on the side of the peak surface closer to the body along the first direction.
[0010] According to a first aspect embodiment of the present application, the battery cell includes a first connecting portion and a second connecting portion. The first connecting portion is bonded to the protrusion through the conductive adhesive layer. The second connecting portion protrudes from the protrusion and is bent from the peak surface toward the body relative to the first connecting portion. The circuit board is connected to the second connecting portion.
[0011] According to a first aspect embodiment of the present application, the battery cell further has a second direction intersecting the first direction, and the second connecting portion and the groove wall of the receiving groove form a receiving space, and the circuit board is located in the receiving space such that the circuit board is clamped between the second connecting portion and the main body.
[0012] According to a first aspect embodiment of the battery cell, the protrusion is provided with a first groove at one end away from the body along the first direction. The first groove is recessed from the peak surface toward the body. The tab is connected to the first groove. The first connecting portion and the conductive adhesive layer are both located on the side of the first groove closer to the body along the first direction. The second connecting portion protrudes from the first groove along the first direction from the protrusion. The second connecting portion bends relative to the first connecting portion toward the body from the bottom of the first groove.
[0013] According to the battery cell of the first aspect of this application, the battery cell further has a third direction, which intersects with the first direction, the width of the first groove in the third direction is L1, and the width of the tab in the third direction is L2, satisfying: L2 < L1.
[0014] According to the battery cell of the first aspect of this application, the battery cell further has a third direction, which intersects with the first direction. The protrusion is provided with a plurality of second grooves, each of which is recessed from the peak surface toward the main body. The plurality of second grooves are spaced apart along the third direction to define a folding structure between any two adjacent second grooves. The tab is connected to any one of the folding structures, and the folding structure can be bent toward the main body.
[0015] According to the battery cell of the first aspect of this application, in the third direction, the width of the tab is L2, and the farthest distance between any two second grooves is L3, satisfying: L2 < L3.
[0016] According to a first aspect embodiment of the present application, the folding structure is bent toward the main body such that both the circuit board and the folding structure are located within the receiving groove, and the circuit board is located on the side of the folding structure away from the main body along the first direction.
[0017] The battery according to a second aspect embodiment of this application includes: a battery cell as described above.
[0018] The battery of this application has the following advantages:
[0019] In the battery of this application, since the battery cell of the application can have a high energy density, the battery of this application can have a high battery capacity to meet the use requirements of large capacity batteries. Attached Figure Description
[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0021] Figure 1 This shows a front view schematic diagram of the electrode assembly of Embodiment 1 in this application;
[0022] Figure 2 A side view of the electrode assembly of Embodiment 1 in this application is shown.
[0023] Figure 3 A side view of the battery cell of Embodiment 1 in this application is shown.
[0024] Figure 4 This shows a front view schematic diagram of the electrode assembly in Embodiment 2 of this application;
[0025] Figure 5 It shows Figure 4 Enlarged structural diagram at point A;
[0026] Figure 6 This shows a front view schematic diagram of the electrode assembly in Embodiment 3 of this application;
[0027] Figure 7 It shows Figure 6 Enlarged structural diagram at point B;
[0028] Figure 8 A side view of the battery cell of Embodiment 3 in this application is shown.
[0029] Explanation of key component symbols:
[0030] 100 - Electrode assembly; 110 - Battery cell; 111 - Body; 112 - Protrusion; 1121 - Peak surface; 1122 - First groove; 1123 - Second groove; 1124 - Folding structure; 113 - Receiving groove; 114 - Receiving space; 120 - Tab; 121 - First connecting part; 122 - Second connecting part; 130 - Conductive adhesive layer;
[0031] 200 - Circuit board;
[0032] x - First direction; y - Second direction; z - Third direction. Detailed Implementation
[0033] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.
[0034] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.
[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0036] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0037] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0038] Example 1
[0039] Reference Figure 1 , Figure 2 as well as Figure 3 As shown, the battery cell involved in the embodiments of this application has a first direction x, and the battery cell includes: an electrode assembly 100 and a circuit board 200.
[0040] Specifically, the electrode assembly 100 includes a battery cell 110 and a tab 120. The battery cell 110 includes a body 111 and a protrusion 112. The protrusion 112 is disposed at one end of the body 111 along a first direction x and protrudes from the body 111 along the first direction x to define a receiving groove 113 between the protrusion 112 and the body 111. The tab 120 is bonded to the protrusion 112 and at least partially protrudes from the protrusion 112 along the first direction x in a direction away from the body 111. The circuit board 200 is housed in the receiving groove 113. The tab 120 protrudes from the protrusion 112 and can be bent at various points, with the bending direction of the tab 120 facing the receiving groove 113, so that the circuit board 200 is connected to the tab 120.
[0041] It should be noted that the first direction x is Figure 1 , Figure 2 as well as Figure 3 The direction indicated by x in the middle.
[0042] In the battery cell of this application, the tab 120 can be bonded to the protrusion 112 to achieve electrical connection between the tab 120 and the cell 110. At the same time, the circuit board 200 can be housed in the receiving groove 113 to reduce the battery space occupied by the circuit board 200. Furthermore, since the tab 120 can be bent at various points protruding from the protrusion 112, and the bending direction of the tab 120 is towards the receiving groove 113 to connect the circuit board 200 and the tab 120, the circuit board 200 and the tab 120 can be connected by bending the tab 120. At the same time, the tab 120 can be avoided by folding it multiple times to reduce the battery space occupied by the tab, thereby improving the energy density of the battery cell.
[0043] Reference Figure 2 As shown, the electrode assembly 100 also includes a conductive adhesive layer 130. The tab 120 is connected to the protrusion 112 through the conductive adhesive layer 130. The protrusion 112 has a peak surface 1121 at one end away from the main body 111 along the first direction x, and the conductive adhesive layer 130 is located on the side of the peak surface 1121 close to the main body 111 along the first direction x.
[0044] In this embodiment, the tab 120 and the protrusion 112 can be connected by the conductive adhesive layer 130. Since the conductive adhesive layer 130 is located on the side of the peak surface 1121 of the protrusion 112 close to the main body 111 of the cell 110 along the first direction x, when the tab 120 is bent, the conductive adhesive layer 130 can be prevented from interfering with the bending of the tab 120, so that the height of the bent tab 120 in the first direction x can be reduced as much as possible, thereby reducing the battery space occupied by the tab 120 and thus improving the energy density of the battery cell.
[0045] Reference Figure 2 as well as Figure 3 As shown, the tab 120 includes a first connecting portion 121 and a second connecting portion 122. The first connecting portion 121 is bonded to the protrusion 112 by a conductive adhesive layer 130. The second connecting portion 122 protrudes from the protrusion 112 and bends from the peak surface 1121 toward the main body 111 relative to the first connecting portion 121. The circuit board 200 is connected to the second connecting portion 122.
[0046] In this embodiment, the first connecting portion 121 can be bonded to the protrusion 112 by the conductive adhesive layer 130, thereby realizing the electrical connection between the tab 120 and the cell 110. Since the second connecting portion 122 protrudes from the protrusion 112 and bends relative to the first connecting portion 121 toward the main body 111, the circuit board 200 is connected to the second connecting portion 122. Therefore, the circuit board 200 can be placed in the receiving groove 113 by bending the second connecting portion 122, thereby reducing the battery space occupied by the circuit board 200. Also, since the second connecting portion 122 bends relative to the first connecting portion 121 toward the main body 111 from the peak surface 1121, the height of the second connecting portion 122 in the first direction x can be reduced as much as possible when the second connecting portion 122 is bent, thereby reducing the battery space occupied by the tab 120.
[0047] Reference Figure 3 As shown, the battery cell also has a second direction y, which intersects with the first direction x. The second connecting part 122 and the groove wall of the receiving groove 113 enclose a receiving space 114. The circuit board 200 is located in the receiving space 114, so that the circuit board 200 is clamped between the second connecting part 122 and the main body 111.
[0048] It should be noted that the second direction y is Figure 2 as well as Figure 3 The direction indicated by y in the middle.
[0049] In this embodiment, since the circuit board 200 is located within the receiving space 114, the circuit board 200 can be clamped between the second connecting portion 122 and the main body 111. Furthermore, since the second connecting portion 122 can be bent from its peak surface 1121 relative to the first connecting portion 121 towards the main body 111, the height of the receiving space 114 in the first direction x can be reduced. Therefore, when the circuit board 200 is placed within the receiving space 114, the circuit board 200 can lie flat within the receiving space 114. (Refer to...) Figure 3 As shown, the circuit board 200 is placed in the receiving space 114 with the minimum thickness in the first direction x, thereby further reducing the battery space occupied by the circuit board 200.
[0050] Example 2
[0051] Reference Figure 4 , Figure 5 as well as Figure 8As shown, the protrusion 112 has a first groove 1122 at one end away from the main body 111 along the first direction x. The first groove 1122 is recessed from the peak surface 1121 toward the main body 111. The tab 120 is connected to the first groove 1122. The first connecting part 121 and the conductive adhesive layer 130 are both located on the side of the first groove 1122 close to the main body 111 along the first direction x. The second connecting part 122 protrudes from the first groove 1122 along the first direction x and bends toward the main body 111 relative to the first connecting part 121 from the bottom of the first groove 1122.
[0052] In this embodiment, since the tab 120 is connected to the first groove 1122, and the first connecting portion 121 and the conductive adhesive layer 130 are both located on the side of the first groove 1122 close to the main body 111 along the first direction x, and the second connecting portion 122 protrudes from the first groove 1122 along the first direction x from the protrusion 112, the second connecting portion 122 can be bent from the bottom of the first groove 1122 relative to the first connecting portion 121 toward the main body 111. Thus, when the second connecting portion 122 bends toward the main body 111, the distance between the second connecting portion 122 and the main body 111 can be further reduced in the first direction x, thereby further reducing the height of the tab 120 after bending in the first direction x, thereby reducing the battery space occupied by the tab 120.
[0053] Reference Figure 5 As shown, the battery cell also has a third direction z, which intersects with the first direction x. The width of the first groove 1122 in the third direction z is L1, and the width of the tab 120 in the third direction z is L2, satisfying: L2 < L1.
[0054] It should be noted that the third party is z. Figure 1 as well as Figure 4 The direction indicated by z in the middle.
[0055] In this embodiment, if the width L1 of the first groove 1122 in the third direction z and the width L2 of the tab 120 in the third direction z satisfy L2≥L1, then the second connecting part 122 cannot be bent from the bottom of the first groove 1122 relative to the first connecting part 121 toward the main body 111, and thus the height of the tab 120 after bending in the first direction x cannot be further reduced. If the width L1 of the first groove 1122 in the third direction z and the width L2 of the tab 120 in the third direction z satisfy L2<L1, then the second connecting part 122 can be bent from the bottom of the first groove 1122 relative to the first connecting part 121 toward the main body 111, and the height of the tab 120 after bending in the first direction x can be further reduced, thereby further reducing the battery space occupied by the tab 120.
[0056] Specifically, refer to Figure 5 As shown, the depth of the first groove 1122 in the first direction x is L4, which satisfies: 0.1mm≤L4≤5mm.
[0057] In this embodiment, if the depth L4 of the first groove 1122 in the first direction x is greater than 5mm, the depth of the first groove 1122 in the first direction x will be too deep, that is, the reserved height of the protrusion 112 corresponding to the first groove 1122 will be too small. When the tab 120 is bent, the reserved portion of the protrusion 112 corresponding to the first groove 1122 may break. If the depth L4 of the first groove 1122 in the first direction x is less than 0.1mm, that is, the reserved height of the protrusion 112 corresponding to the first groove 1122 will be too large, when the tab 120 is bent, a portion of the bent tab may still protrude from the protrusion 112 along the first direction. When the depth L4 of the first groove 1122 in the first direction x satisfies: 0.1mm≤L4≤5mm, the damage to the protrusion 112 can be reduced, and the battery space occupied by the tab 120 can also be reduced.
[0058] Example 3
[0059] Reference Figure 6 , Figure 7 as well as Figure 8 As shown, the protrusion 112 is provided with a plurality of second grooves 1123, each second groove 1123 being recessed from the peak surface 1121 toward the main body 111. The plurality of second grooves 1123 are spaced apart along the third direction z to define a folding structure 1124 between any two adjacent second grooves 1123. The tab 120 is connected to any one of the folding structures 1124, and the folding structure 1124 can be bent toward the main body 111.
[0060] In this embodiment, since the tab 120 is connected to any one of the folding structures 1124, and the folding structure 1124 can be bent toward the body 111, the tab 120 can be bent toward the body 111 by bending the folding structure 1124 toward the body 111. Since the second groove 1123 is recessed toward the body 111 from the peak surface 1121, when the folding structure 1124 is bent toward the body 111, the distance between the tab 120 and the body 111 can be further reduced in the first direction x, thereby further reducing the height of the tab 120 in the first direction x after bending, thereby reducing the battery space occupied by the tab 120.
[0061] Reference Figure 7 As shown, in the third direction z, the width of the tab 120 is L2, and the farthest distance between any two second grooves 1123 is L3, satisfying: L2 < L3.
[0062] In this embodiment, in the third direction z, if the width L2 of the tab 120 and the farthest distance L3 between any two second grooves 1123 satisfy L2≥L3, then when the tab 120 is bonded to the protrusion 112, the part of the tab 120 located in the second groove 1123 may not be able to bond with the protrusion 112, which will lead to a decrease in the connection stability between the tab 120 and the protrusion 112, or interference between the tab 120 and the protrusion 112 when the folding structure 1124 is bent toward the main body 111. If the width L2 of the tab 120 and the farthest distance L3 between any two second grooves 1123 satisfy L2<L3, the influence of the second groove 1123 on the bonding of the tab 120 can be avoided, and interference between the tab 120 and the protrusion 112 can also be avoided when bending.
[0063] Specifically, refer to Figure 7 As shown, on the third direction z, the distance between any second groove 1123 and the tab 120 is L5, which satisfies: 1mm≤L5≤5mm.
[0064] In this embodiment, if the distance L5 between any second groove 1123 and the tab 120 is less than 1mm, the tab may be damaged during the grooving process. Additionally, the portion of the tab 120 located in the second groove 1123 may not adhere to the protrusion 112. If the distance L5 between any second groove 1123 and the tab 120 is greater than 5mm, bending the tab 120 will cause it to bend more protrusions 112 together, increasing the difficulty of bending the tab 120 and affecting the structural strength of the protrusion 112. When the distance L5 between any second groove 1123 and the tab 120 satisfies 1mm ≤ L5 ≤ 5mm, the adhesion stability between the tab 120 and the protrusion 112 is improved, and the impact on the structural strength of the protrusion 112 is reduced.
[0065] Reference Figure 8 As shown, the folding structure 1124 bends toward the main body 111 and the circuit board 200 and the folding structure 1124 are both located in the receiving groove 113, and the circuit board 200 is located on the side of the folding structure 1124 away from the main body 111 along the first direction x.
[0066] In this embodiment, since the tab 120 can be bent to a position closer to the main body 111, the circuit board 200 and the bent tab 120 can be soldered along the first direction x away from the main body 111. That is, after the tab 120 is bent, both the tab 120 and the circuit board 200 are located in the receiving groove 113, and the tab 120 is located between the circuit board 200 and the main body 111. This further reduces the battery space occupied by the tab 120 and the circuit board 200. At the same time, the circuit board 200 can provide pressure to the tab 120, thereby improving the connection stability between the circuit board 200 and the tab 120.
[0067] The battery involved in the embodiments of this application includes: the above-mentioned battery cell.
[0068] In the battery of this application, since the battery cell of the application can have a high energy density, the battery of this application can have a high battery capacity to meet the use requirements of large capacity batteries.
[0069] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0070] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.
Claims
1. A battery cell, characterized by, The battery cell has a first direction (x), and comprises: An electrode assembly (100) comprising an electrode core (110) and a tab (120), the electrode core (110) comprising a main body (111) and a protrusion (112) arranged at one end of the main body (111) along the first direction (x) and protruding from the main body (111) along the first direction (x) to define a receiving groove (113) between the protrusion (112) and the main body (111), the tab (120) being bonded to the protrusion (112) and protruding from the protrusion (112) at least partially along the first direction (x) away from the main body (111); A circuit board (200) accommodated in the receiving groove (113), each part of the tab (120) protruding from the protrusion (112) can be bent, and the bending direction of the tab (120) is towards the receiving groove (113) so that the circuit board (200) is connected with the tab (120).
2. The battery cell of claim 1, wherein, The electrode assembly (100) further comprises a conductive adhesive layer (130), the tab (120) is connected with the protrusion (112) through the conductive adhesive layer (130), the protrusion (112) has an apex surface (1121) at one end thereof away from the main body (111) along the first direction (x), and the conductive adhesive layer (130) is located at a side of the apex surface (1121) close to the main body (111) along the first direction (x).
3. The battery cell of claim 2, wherein, The tab (120) comprises a first connecting portion (121) and a second connecting portion (122), the first connecting portion (121) is bonded to the protrusion (112) through the conductive adhesive layer (130), the second connecting portion (122) protrudes from the protrusion (112), and the second connecting portion (122) is bent from the first connecting portion (121) towards the main body (111) at the apex surface (1121), and the circuit board (200) is connected with the second connecting portion (122).
4. The battery cell of claim 3, wherein, The battery cell further has a second direction (y) intersecting the first direction (x), the second connecting portion (122) and a groove wall of the receiving groove (113) form a receiving space (114), and the circuit board (200) is located in the receiving space (114) so that the circuit board (200) is clamped between the second connecting portion (122) and the main body (111).
5. The battery cell of claim 3, wherein, The protruding part (112) is provided with a first groove (1122) at one end away from the main body (111) along the first direction (x), the first groove (1122) is recessed from the top peak surface (1121) towards the main body (111), the tab (120) is connected at the first groove (1122), and the first connecting part (121) and the conductive adhesive layer (130) are both located on the side of the first groove (1122) close to the main body (111) along the first direction (x), the second connecting part (122) protrudes from the protruding part (112) at the first groove (1122) along the first direction (x), and the second connecting part (122) is bent towards the main body (111) from the groove bottom of the first groove (1122) relative to the first connecting part (121).
6. The battery cell of claim 5, wherein, The battery monomer also has a third direction (z) intersecting the first direction (x), the width of the first groove (1122) in the third direction (z) is L1, and the width of the tab (120) in the third direction (z) is L2, satisfying: L2 < L1.
7. The battery cell of claim 2, wherein, The battery monomer also has a third direction (z) intersecting the first direction (x), the protruding part (112) is provided with a plurality of second grooves (1123), each of the second grooves (1123) is recessed from the top peak surface (1121) towards the main body (111), and a plurality of the second grooves (1123) are arranged at intervals along the third direction (z) to define a folding structure (1124) between any two adjacent second grooves (1123), the tab (120) is connected to any one of the folding structures (1124), and the folding structure (1124) can be bent towards the main body (111).
8. The battery cell of claim 7, wherein, In the third direction (z), the width of the tab (120) is L2, the farthest distance between any two second grooves (1123) is L3, satisfying: L2 < L3.
9. The battery cell of claim 7, wherein, The folding structure (1124) is bent towards the main body (111) to the circuit board (200) and the folding structure (1124) are both located in the accommodating groove (113), and the circuit board (200) is located on the side of the folding structure (1124) away from the main body (111) along the first direction (x).
10. A battery, characterized by Comprise: The battery monomer of any one of claims 1-9.