Battery monomer and battery pack

Abstract

The utility model provides a battery monomer and a battery pack, and relates to the technical field of batteries. Each battery monomer comprises an electrode assembly and an insulating support part, the electrode assembly is formed by winding a first pole piece, a second pole piece and an isolating layer, the electrode assembly is provided with a first bending area and a second bending area, and the insulating support part is arranged in the electrode assembly and is positioned between the first bending area and the second bending area; the insulating supporting piece comprises a main body part and at least one abutting part, the abutting part is connected with the end of the main body part, the abutting part abuts against the electrode assembly and is located in the bending area, and the size of the abutting part is gradually decreased in the direction from the main body part to the bending area. According to the battery monomer provided by the invention, supporting force can be provided for the parts, in the bending area, of the first pole piece and the second pole piece through the insulating supporting piece, so that the condition that a gap between the pole pieces in the bending area is easy to be too large is improved, and the risk of thermal runaway of the battery monomer is reduced.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery cell and a battery pack. Background Technology

[0002] The information disclosed in this background section is intended only to enhance the understanding of the general background of this disclosure and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art.

[0003] Battery cells are an important component of battery packs. The electrode assembly of battery cells is usually manufactured using two types of processes: winding and stacking. For electrode assemblies manufactured using the winding process, large gaps are easily generated between the electrodes in the bending area formed by winding, which increases the risk of thermal runaway of the battery cell. Utility Model Content

[0004] In view of this, the purpose of this application is to provide a battery cell and a battery pack, which aims to solve the technical problem of how to reduce the risk of thermal runaway in a battery cell.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0006] In a first aspect, embodiments of this application provide a single battery cell, comprising:

[0007] An electrode assembly having intersecting first and third directions, the electrode assembly including a first electrode, a second electrode and an insulating layer, the first electrode, the second electrode and the insulating layer being wound to form the electrode assembly, the electrode assembly having a first bending region and a second bending region along the first direction;

[0008] An insulating support is disposed within the electrode assembly and located between the first bending region and the second bending region. The insulating support includes a main body and at least one abutting portion. The abutting portion is connected to the end of the main body along the first direction. The abutting portion abuts against the electrode assembly and is located in the bending region. The dimension of the abutting portion gradually decreases from the main body towards the bending region along the third direction.

[0009] In one embodiment of the first aspect, the abutting portion is provided with inclined support surfaces on two opposite sides along the third direction, the abutting portion is provided with support surfaces on two opposite sides along the first direction, the support surfaces are connected to the two inclined support surfaces provided opposite to each other along the third direction, and the support surfaces are abutted against the electrode assembly.

[0010] In one embodiment of the first aspect, the support surface is an arc surface, and the support surface is convex in the direction of the first direction toward the bending area.

[0011] In one embodiment of the first aspect, the number of abutting portions is two, and the two abutting portions are connected to both ends of the main body portion along the first direction.

[0012] In one embodiment of the first aspect, the isolation layer includes a first isolation layer and a second isolation layer, the first isolation layer being located within the electrode assembly, the first isolation layer and the second isolation layer being disposed opposite to each other along the third direction, and the first isolation layer and the second isolation layer being respectively connected to the main body portion.

[0013] In one embodiment of the first aspect, the insulating support further includes an adhesive layer disposed on two opposite sides of the main body portion along the third direction, the adhesive layer being bonded to the first insulating layer and the second insulating layer respectively.

[0014] In one embodiment of the first aspect, the electrode assembly further has a second direction intersecting the first direction and the third direction respectively, and a wetting channel is provided through the main body along the second direction, the wetting channel communicating with the interior of the electrode assembly.

[0015] In one embodiment of the first aspect, the number of the wetting channels is multiple, and the multiple wetting channels are spaced apart along the first direction.

[0016] In one embodiment of the first aspect, the main body is provided with an impregnation hole on at least one side along the third direction, the impregnation hole is in communication with the impregnation channel, and the number of the impregnation holes is multiple, the multiple impregnation holes are spaced apart along the second direction.

[0017] Secondly, embodiments of this application provide a battery pack including the battery cells described in any of the embodiments of the first aspect above.

[0018] The beneficial effects of this application are as follows:

[0019] This application provides a battery cell in which an insulating support is provided within the electrode assembly. The insulating support includes a main body and at least one abutting portion, which is connected to the end of the main body. The size of the abutting portion gradually decreases from the main body towards the bending area of ​​the electrode assembly. The abutting portion abuts against the electrode assembly and is located in the bending area. In this way, the insulating support provides support for the first and second electrodes in the bending area, improving the situation where the gap between the electrodes is easily too large at the bending area, thereby reducing the risk of thermal runaway in the battery cell.

[0020] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0021] 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.

[0022] Figure 1 This diagram shows a schematic view of the electrode assembly of a battery cell in the prior art.

[0023] Figure 2 This illustration shows a schematic diagram of the assembly structure of the electrode assembly and insulating support in one embodiment of this application.

[0024] Figure 3 A three-dimensional assembly structure diagram of the electrode assembly and insulating support member in one embodiment of this application is shown;

[0025] Figure 4 This paper shows a schematic diagram of the electrode assembly from one perspective in one embodiment of the present application;

[0026] Figure 5 This paper shows a schematic diagram of the insulating support member from one perspective in one embodiment of the present application;

[0027] Figure 6 It shows Figure 5 Enlarged structural diagram of region A in the middle;

[0028] Figure 7 It shows Figure 5 Schematic diagram of the cross section at point BB;

[0029] Figure 8 A three-dimensional structural schematic diagram of an insulating support member in one embodiment of this application is shown.

[0030] Explanation of key component symbols:

[0031] Explanation of key component symbols in the prior art: 200 - electrode assembly; 210 - first electrode; 220 - second electrode; d - gap;

[0032] Explanation of key component symbols in this application: 110 - Electrode assembly; 111 - First electrode; 112 - Second electrode; 113 - Insulation layer; 1131 - First insulation layer; 1132 - Second insulation layer; 120 - Insulating support; 1201 - Main body; 1202 - Abutting part; 1211 - Immersion channel; 1212 - Immersion hole; 122 - Inclined support surface; 123 - Support surface; N1 - First bending area; N2 - Second bending area; M - Straight area; X - First direction; Y - Second direction; Z - Third direction. Detailed Implementation

[0033] The embodiments of this application are described in detail below. Examples of the 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," "second," etc., 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. Therefore, 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," "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, the term "and / or" indicates that three relationships can exist. For example, A and / or B can represent three cases: A alone, A and B simultaneously, and B alone. Additionally, the character " / " generally indicates that the preceding and following objects have an "or" relationship.

[0038] 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.

[0039] Battery cells are an important component of battery packs. The electrode components of battery cells are typically manufactured using two methods: winding and stacking.

[0040] like Figure 1 As shown, for the electrode assembly 200 manufactured by the winding process, the inventors discovered during the research and development process that, in the production process of existing battery cells, when the electrode assembly 200 is subjected to external forces (such as equipment vibration, personnel operation, inter-process transfer, etc.), a large gap d is easily generated between the first electrode 210 and the second electrode 220 in its bending area, which leads to the precipitation of metal ions at this location. As the number of battery cell cycles increases, it is easy for the battery cell to experience thermal runaway.

[0041] To address the aforementioned technical problems, firstly, embodiments of this application provide a single battery cell, relating to the field of battery technology, primarily used in battery packs, to be indirectly applied in electrical devices such as new energy vehicles, ships, and spacecraft, or in energy storage devices such as energy storage containers and energy storage power stations. Of course, the single battery cell provided in this embodiment can also be directly applied to electrical devices or energy storage devices without using a battery pack; no specific limitations are placed on the application scenarios of the single battery cell.

[0042] like Figures 2 to 4 As shown, the battery cell provided in this embodiment includes an electrode assembly 110 and an insulating support 120.

[0043] The electrode assembly 110 has intersecting first direction X and third direction Z. The electrode assembly 110 includes a first electrode 111, a second electrode 112, and an insulating layer 113. The first electrode 111, the second electrode 112, and the insulating layer 113 are wound to form the electrode assembly 110. The electrode assembly 110 has a first bending region N1 and a second bending region N2 along the first direction X. An insulating support member 120 is disposed within the electrode assembly 110 and located between the first bending region N1 and the second bending region N2. The insulating support member 120 includes a main body portion 1201 and at least one abutting portion 1202. The abutting portion 1202 is connected to the end of the main body portion 1201 along the first direction X. The abutting portion 1202 abuts against the electrode assembly 110 and is located in the bending region. The size of the abutting portion 1202 along the third direction Z gradually decreases from the main body portion 1201 towards the bending region.

[0044] For example, the first electrode 111 is a positive electrode and the second electrode 112 is a negative electrode. Of course, the first electrode 111 can also be a negative electrode and the second electrode 112 can be a positive electrode. There is no specific limitation on the type of electrode. In the battery cell provided in this embodiment, the first electrode 111 is a positive electrode and the second electrode 112 is a negative electrode.

[0045] For example, the isolation layer 113 may be a diaphragm or other layered structure with insulation and semi-permeability, and there is no specific limitation on the type of isolation layer 113.

[0046] For example, there are two abutment portions 1202, and the two abutment portions 1202 are connected to both ends of the main body portion 1201 along the first direction X. Of course, there may also be only one abutment portion 1202, and there is no specific limitation on the number of abutment portions 1202 here.

[0047] It is understood that the battery cell provided in this embodiment has an insulating support 120 provided within the electrode assembly 110. The insulating support 120 includes a main body 1201 and at least one abutment portion 1202. The abutment portion 1202 is connected to the end of the main body 1201, and the size of the abutment portion 1202 gradually decreases from the main body 1201 towards the bending area of ​​the electrode assembly 110. The abutment portion 1202 abuts against the electrode assembly 110 and is located in the bending area. In this way, the insulating support 120 can provide support force to the first electrode 111 and the second electrode 112 in the bending area, thereby improving the situation where the gap between the electrodes is easily too large at the bending area, reducing the possibility of metal ion precipitation, and thus reducing the risk of thermal runaway of the battery cell.

[0048] like Figure 4As shown, it should be noted that the first bending region N1 and the second bending region N2 of the electrode assembly 110 mentioned above are the two parts that are bent relative to the two ends of the straight region M. That is, the electrode assembly 110 has a first bending region N1, a second bending region N2 and a straight region M, and the straight region M is connected between the first bending region N1 and the second bending region N2 along the first direction X.

[0049] In addition, the insulating support 120 can be made of materials such as polypropylene (PP) and polyethylene (PE), so that the insulating support 120 has insulation properties to reduce the risk of short circuit in the electrode assembly 110, and has a certain degree of rigidity and elasticity to better support the electrode assembly 110 and thus improve the situation where the gap between the electrodes is too large.

[0050] like Figures 4 to 6 As shown, in one embodiment, the abutment portion 1202 is provided with inclined support surfaces 122 on two opposite sides along the third direction Z, and the abutment portion 1202 is provided with support surfaces 123 on two opposite sides along the first direction X. The support surfaces 123 are connected to the two inclined support surfaces 122 that are provided opposite to each other along the third direction Z, and the support surfaces 123 are abutted against the electrode assembly 110.

[0051] It is understandable that, since the abutment portion 1202 is provided with inclined support surfaces 122 on two opposite sides along the third direction Z, the size of the abutment portion 1202 along the third direction Z gradually decreases from the main body portion 1201 toward the bending area, that is, the abutment portion 1202 has a certain slope. This can reduce the possibility of the electrode assembly 110 being damaged by the pressure of the abutment portion 1202 during the hot and cold pressing process, thereby further reducing the risk of thermal runaway of the battery cell.

[0052] Of course, for the above embodiment, a conical abutment portion 1202 can also be used, which can also make the dimension of the abutment portion 1202 gradually decrease from the main body portion 1201 towards the bending area along the third direction Z.

[0053] like Figures 4 to 6 As shown, the support surface 123 is further curved, and the support surface 123 is convex in the direction of the first direction X towards the bending area.

[0054] For example, the arc surface can be a circular arc surface, an elliptical arc surface, etc., without any specific limitations.

[0055] It is understandable that since the abutment portion 1202 has arc surfaces that protrude toward the bending area on two opposite sides along the first direction X, the abutment portion 1202 is not too sharp, which can further reduce the possibility of the electrode assembly 110 being damaged by the pressure of the abutment portion 1202 during the hot and cold pressing process.

[0056] like Figures 2 to 4 As shown, in one embodiment, the isolation layer 113 includes a first isolation layer 1131 and a second isolation layer 1132. The first isolation layer 1131 is located inside the electrode assembly 110. The first isolation layer 1131 and the second isolation layer 1132 are disposed opposite to each other along the third direction Z. The first isolation layer 1131 and the second isolation layer 1132 are respectively connected to the main body 1201.

[0057] It should be noted that the "first isolation layer 1131 is located inside the electrode assembly 110, and the first isolation layer 1131 and the second isolation layer 1132 are arranged opposite each other along the third direction Z" mentioned above means that at the starting position of the winding of the electrode assembly 110, the first isolation layer 1131 and the second isolation layer 1132 are arranged opposite each other along the third direction Z.

[0058] It is understandable that by connecting the first insulating layer 1131 and the second insulating layer 1132 to the main body 1201 of the insulating support member 120, the rigidity of the electrode assembly 110 can be enhanced, thereby reducing the occurrence of electrode wrinkling due to the electrode assembly 110 being too soft.

[0059] Furthermore, the insulating support 120 also includes an adhesive layer, which is disposed on two opposite sides of the main body 1201 along the third direction Z, and is bonded to the first isolation layer 1131 and the second isolation layer 1132 respectively.

[0060] For example, the adhesive layer can be an adhesive layer, a double-sided adhesive layer, etc. The main components of the adhesive layer are adhesive and solvent for dissolving the adhesive. The adhesive can be polyvinylidene fluoride (PVDF), polytetrafluoroethylene (PTFE), etc., without specific limitations.

[0061] It is understandable that by providing adhesive layers on two opposite sides of the main body 1201 along the third direction Z, and bonding the adhesive layers to the first isolation layer 1131 and the second isolation layer 1132 respectively, the first isolation layer 1131 and the second isolation layer 1132 can be connected to the insulating support member 120 respectively. This can enhance the hardness of the electrode assembly 110 and reduce the occurrence of electrode wrinkling due to the electrode assembly 110 being too soft.

[0062] Of course, in the above embodiment, the first isolation layer 1131 and the second isolation layer 1132 can also be thermally fused to the main body 1201, which can also achieve the connection of the first isolation layer 1131 and the second isolation layer 1132 to the insulating support member 120.

[0063] like Figure 4 , Figure 5 and Figure 7 As shown, in one embodiment, the electrode assembly 110 also has a second direction Y that intersects the first direction X and the third direction Z respectively. A wetting channel 1211 is provided through the main body 1201 along the second direction Y, that is, the wetting channel 1211 penetrates the main body 1201 along the second direction Y. At the same time, the wetting channel 1211 communicates with the inside of the electrode assembly 110.

[0064] It is understandable that since the main body 1201 is provided with a wetting channel 1211 through the second direction Y, and the wetting channel 1211 is connected to the inside of the electrode assembly 110, the electrolyte can quickly reach the inside of the electrode assembly 110 through the wetting channel 1211 during the liquid injection process, thus shortening the time for the electrode assembly 110 to be wetted by the electrolyte.

[0065] It should be noted that when the battery cell includes a casing and a cover plate, the casing has a receiving cavity, the electrode assembly 110 and the insulating support 120 are disposed in the receiving cavity, the cover plate is connected to the casing to seal the receiving cavity, and the wetting channel 1211 is disposed opposite to the cover plate along the second direction Y, so that after the electrolyte is injected from the injection hole of the cover plate, it can reach the interior of the electrode assembly 110 more quickly through the wetting channel 1211 for wetting.

[0066] like Figure 8 As shown, further, there are multiple wetting channels 1211, and the multiple wetting channels 1211 are arranged at intervals along the first direction X.

[0067] It is understandable that by providing multiple wetting channels 1211 at intervals along the first direction X, each wetting channel 1211 can independently guide the electrolyte into the interior of the electrode assembly 110, thereby improving the wetting efficiency of the electrolyte.

[0068] like Figure 5 and Figure 7 As shown, further, an impregnation hole 1212 is provided on one side of the main body 1201 along the third direction Z and / or an impregnation hole 1212 is provided on the other side of the main body 1201 along the third direction Z, that is, an impregnation hole 1212 is provided on at least one side of the main body 1201 along the third direction Z, and the impregnation hole 1212 is connected to the impregnation channel 1211.

[0069] It is understandable that during the electrolyte injection process, the electrolyte first enters the interior of the electrode assembly 110 through the wetting channel 1211, then contacts the isolation layer 113 through the wetting hole 1212, and then contacts the first electrode 111 and the second electrode 112 through the pores on the isolation layer 113, so as to wet the electrode assembly 110.

[0070] like Figure 5 , Figure 7 and Figure 8 As shown, further, there are multiple wetting holes 1212, which are spaced apart along the second direction Y.

[0071] It is understood that by providing multiple wetting holes 1212 at intervals along the second direction Y, each wetting hole 1212 can independently guide the electrolyte from the wetting channel 1211 into the interior of the electrode assembly 110, thereby improving the wetting efficiency of the electrolyte.

[0072] like Figure 5 As shown, in one embodiment, the main body 1201 has a dimension of T along the third direction Z, which satisfies: 0.2mm≤T≤0.4mm.

[0073] For example, the dimension T of the main body 1201 along the third direction Z can be any value of 0.2mm, 0.2mm, 0.25mm, 0.3mm, 0.31mm, 0.4mm or any value within a range of any two of these, without any specific limitation.

[0074] It should be noted that during the research and development process, the inventors discovered that for lithium-ion battery cells, if the dimension T of the main body 1201 along the third direction Z is too small, although it can effectively improve the lithium-ion deposition, it is prone to electrode wrinkling, usually occurring at the electrode in the straight area M. However, because the distance between the second electrode 112 (negative electrode) and the first electrode 111 (positive electrode) along the first direction X in the bending area is relatively large, purple spots are prone to appear on the second electrode 112 (negative electrode). If the dimension T of the main body 1201 along the third direction Z is too large (greater than 0.4 mm), it will cause a large distance between the second electrode 112 (negative electrode) and the first electrode 111 (positive electrode) along the first direction X, resulting in purple spots.

[0075] It is understandable that by controlling the dimension T of the main body 1201 of the insulating support 120 along the third direction Z within the range of 0.2mm to 0.4mm, the wrinkling of the electrode sheet and the appearance of purple spots can be effectively improved.

[0076] Secondly, embodiments of this application provide a battery pack including the battery cells in any of the embodiments of the first aspect described above.

[0077] It is understood that since the battery pack provided in this embodiment has the battery cell in any of the embodiments of the first aspect, it has all the beneficial effects of the battery cell, which will not be described in detail here.

[0078] To better illustrate the beneficial effects of the embodiments of this application, the performance test results of a single lithium-ion battery cell are provided in the table below.

[0079]

[0080] I. Test Methods: 1. Under room temperature (25±3°C), perform cyclic testing on the battery cells using FC / 1C charge / discharge cycles. After 500 cycles, disassemble the battery cells and observe for lithium ion deposition (lithium plating) or other problems. 2. The dimension T of the main body 1201 along the third direction Z can be measured using vernier calipers, CCD thickness gauges, height gauges, pin gauges, or micrometers.

[0081] II. Test Conclusions: In test group 1, without the use of insulating support 120, lithium plating and purple spots appeared in the bending area of ​​electrode assembly 110; in test groups 2 to 6, with the use of insulating support 120, lithium plating did not appear in the bending area of ​​electrode assembly 110. Among them, the T value of test group 2 was 0.1 mm, the T value of test group 6 was 0.5 mm, and purple spots appeared. The T values ​​of test groups 3 to 5 were in the range of 0.2 mm to 0.4 mm, and no purple spots appeared.

[0082] 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.

[0083] 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 in that, include: An electrode assembly (110) has intersecting first direction (X) and third direction (Z). The electrode assembly (110) includes a first electrode (111), a second electrode (112), and an insulating layer (113). The first electrode (111), the second electrode (112), and the insulating layer (113) are wound to form the electrode assembly (110). The electrode assembly (110) has a first bending region (N1) and a second bending region (N2) along the first direction (X). An insulating support (120) is disposed within the electrode assembly (110) and located between the first bending region (N1) and the second bending region (N2). The insulating support (120) includes a main body (1201) and at least one abutting portion (1202). The abutting portion (1202) is connected to the end of the main body (1201) along the first direction (X). The abutting portion (1202) abuts against the electrode assembly (110) and is located in the bending region. The dimension of the abutting portion (1202) along the third direction (Z) gradually decreases from the main body (1201) toward the bending region.

2. The battery cell according to claim 1, characterized in that, The abutment portion (1202) is provided with inclined support surfaces (122) on two opposite sides along the third direction (Z), and the abutment portion (1202) is provided with support surfaces (123) on two opposite sides along the first direction (X). The support surfaces (123) are connected to the two inclined support surfaces (122) provided opposite to each other along the third direction (Z), and the support surfaces (123) are abutted against the electrode assembly (110).

3. The battery cell according to claim 2, characterized in that, The support surface (123) is an arc surface, and the support surface (123) is convex along the first direction (X) towards the bending area.

4. The battery cell according to claim 1, characterized in that, The number of abutting parts (1202) is two, and the two abutting parts (1202) are connected to the two ends of the main body part (1201) along the first direction (X).

5. The battery cell according to claim 1, characterized in that, The isolation layer (113) includes a first isolation layer (1131) and a second isolation layer (1132). The first isolation layer (1131) is located inside the electrode assembly (110). The first isolation layer (1131) and the second isolation layer (1132) are disposed opposite to each other along the third direction (Z). The first isolation layer (1131) and the second isolation layer (1132) are respectively connected to the main body (1201).

6. The battery cell according to claim 5, characterized in that, The insulating support (120) further includes an adhesive layer disposed on two opposite sides of the main body (1201) along the third direction (Z), and the adhesive layer is bonded to the first isolation layer (1131) and the second isolation layer (1132) respectively.

7. The battery cell according to any one of claims 1 to 6, characterized in that, The electrode assembly (110) also has a second direction (Y) that intersects the first direction (X) and the third direction (Z) respectively. A wetting channel (1211) is provided through the second direction (Y) on the main body (1201), and the wetting channel (1211) communicates with the inside of the electrode assembly (110).

8. The battery cell according to claim 7, characterized in that, The number of the wetting channels (1211) is multiple, and the multiple wetting channels (1211) are spaced apart along the first direction (X).

9. The battery cell according to claim 7, characterized in that, The main body (1201) is provided with an impregnation hole (1212) on at least one side along the third direction (Z). The impregnation hole (1212) is connected to the impregnation channel (1211). There are multiple impregnation holes (1212), and the multiple impregnation holes (1212) are spaced apart along the second direction (Y).

10. A battery pack, characterized in that, Includes the battery cell according to any one of claims 1 to 9.

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