Battery cell spacers, battery cells, battery packs, and vehicles
The battery cell spacer addresses insulation and safety issues by isolating the tab from the housing using a housing groove and gap, while also providing gas discharge features to prevent expansion, thus improving battery cell safety and performance.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- ZHEJIANG ZEEKR INTELLIGENT TECH CO LTD
- Filing Date
- 2023-11-03
- Publication Date
- 2026-07-01
AI Technical Summary
Existing battery cell designs face insulation and safety issues due to incomplete closure of the lower plastic, leading to increased short-circuit risks between the tab and the housing, which compromises the battery's insulation and safety.
A battery cell spacer with a housing groove and gap designed to isolate and constrain the tab, maintaining insulating isolation between the tab and the housing, and featuring relief grooves and holes for gas discharge to prevent expansion and explosion.
The spacer effectively improves insulation and safety by isolating the tab from the housing, preventing short circuits and reducing the risk of battery cell expansion, thereby enhancing overall safety and performance.
Smart Images
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Abstract
Description
Technical Field
[0001] This application is filed based on the Chinese patent application with application number 202211716323.1 and filing date December 29, 2022, and the Chinese patent application with application number 202223610839.6 and filing date December 29, 2022, and claims the priority of the above Chinese patent application. The entire content of the above Chinese patent application is hereby incorporated into this application by reference.
[0002] This application relates to the technical field of vehicles, particularly to spacers for battery cells, battery cells, battery packs, and vehicles.
Background Art
[0003] In the related art, a battery cell can include a cover plate, a lower plastic, and a cell, where the lower plastic abuts between the cover plate and the cell.
[0004] In the prior art, in order to meet the welding requirement of the tab, one side edge of the lower plastic cannot be completely closed. Therefore, after the tab is bent, it cannot be effectively isolated from the housing of the battery cell, and then the short - circuit risk between the tab and the housing is increased, resulting in poor insulation and safety of the battery cell.
Summary of the Invention
Problems to be Solved by the Invention
[0005] This application aims to solve at least one of the technical problems existing in the prior art. For this reason, one object of this application is to provide a spacer for a battery cell, which can effectively improve the insulation and safety of the battery cell.
[0006] Another object of this application is to provide a battery cell.
[0007] Another object of this application is to provide a battery pack.
[0008] The final objective of this application is to submit a vehicle.
[0009] The battery cell spacer submitted in this application is The spacer includes a spacer body, the spacer body having a housing groove, a gap provided in the bottom wall of the housing groove, the gap communicating with the housing groove, and the gap being suitable for passing the tab of the battery cell through, so that a part of the structure of the tab is housed in the housing groove.
[0010] The width of the spacer body is D, and the width of the gap is d, satisfying the relationship 3*d ≤ 2*D.
[0011] The battery cell spacer submitted by the embodiment of this application has a housing groove and a gap in the spacer body, and the gap is connected to the housing groove, thereby isolating and shaping the tab through the spacer, and constraining a part of the structure of the tab inside the spacer, thereby maintaining insulating isolation between the tab and the housing of the battery cell, and thereby significantly improving the insulation and safety of the battery cell. By setting the width of the gap to 2 / 3 times or less the width of the spacer body, the insulating effect of the spacer on the tab can be made to the best effect, and it is not possible to avoid the spacer's insulating effect being reduced due to a gap that is too large.
[0012] In some examples of this application, the spacer body further has a relief groove, the relief groove and the housing groove are arranged along the longitudinal direction of the spacer body, and the relief groove is suitable for discharging gas from inside the battery cell.
[0013] In some examples of this application, at least one relief hole is provided in the bottom wall of the relief groove.
[0014] In some examples of this application, the number of relief holes is multiple, and the multiple relief holes are spaced apart along the longitudinal direction of the spacer body. And / or, a plurality of the relief holes are arranged at intervals along the width direction of the spacer body.
[0015] In some examples of this application, the spacer is Including reinforcing ribs, the reinforcing ribs are provided between the receiving groove and the relief groove, and / or, the reinforcing ribs are provided between the relief holes.
[0016] In some examples of this application, the width of the side wall of the relief groove along the longitudinal direction of the spacer body is D1, and the width of the side wall of the relief groove along the width direction of the spacer body is D2, satisfying the relationship D2*0.8≦D1≦D2*1.2, and D1≧0.8mm, D2≧0.8mm.
[0017] In some examples of this application, the width of the reinforcing rib is D3, and the relation D2*0.5 ≤ D3 ≤ D2 is satisfied.
[0018] In some examples of this application, the spacer body further has a mounting groove, the mounting groove being provided at the end of the housing groove that is away from the relief groove.
[0019] In some examples of this application, the length of the spacer body is L, the length of the relief groove is L1, the width of the mounting groove is L2, and the relationship L≦(L1+L2)*3, and L1≧3mm, L2≧3mm are satisfied.
[0020] The battery cell submitted in this application is Cover plate component and Cells and, The battery cell spacer includes a spacer, wherein the spacer is provided between the cover plate component and the cell, and the spacer is the battery cell spacer described above.
[0021] The battery pack submitted in this application is The battery cell spacer described above, and / or includes the battery cell described above.
[0022] The vehicle submitted by this application the spacer for the battery cell described above, and / or the battery cell described above, and / or includes the battery pack described above.
[0023] Additional aspects and advantages of this application are partially shown in the following description, partially will become clear from the following description, or will be understood by the implementation of this application.
Brief Description of Drawings
[0024] [Figure 1] It is a schematic structural diagram of the battery cell provided by the embodiment of this application. [Figure 2] It is a cross-sectional view of the battery cell provided by the embodiment of this application. [Figure 3] It is a partial enlarged view at the A position in FIG. 2. [Figure 4] It is a schematic structural diagram of the spacer provided by the embodiment of this application. [Figure 5] It is a front view of the spacer provided by the embodiment of this application. [Figure 6] It is a cross-sectional view of the spacer provided by the embodiment of this application.
Modes for Carrying Out the Invention
[0025] The following details the embodiments of this application. The examples of the described embodiments are shown in the drawings, where throughout, the same or similar reference numerals denote the same or similar elements, or elements having the same or similar functions. The embodiments described with reference to the following drawings are exemplary and are intended to be used to explain this application, and should not be understood as limiting this application.
[0026] Figure 1 is a schematic diagram of the structure of the battery cell 1 provided by an embodiment of this application, Figure 2 is a cross-sectional view of the battery cell 1 provided by an embodiment of this application, Figure 3 is a localized enlarged view of position A in Figure 2, Figure 4 is a schematic diagram of the structure of the spacer 10 provided by an embodiment of this application, Figure 5 is a front view of the spacer 10 provided by an embodiment of this application, and Figure 6 is a cross-sectional view of the spacer 10 provided by an embodiment of this application. Hereinafter, with reference to Figures 1 to 6, the spacer 10 for the battery cell 1 according to an embodiment of this application will be described, which includes a spacer body 100, the spacer body 100 having a housing groove 110, a gap 120 provided in the bottom wall of the housing groove 110, the gap 120 communicating with the housing groove 110, and the gap 120 being suitable for passing the tab 31 of the battery cell 1 through, so that a part of the structure of the tab 31 is housed in the housing groove 110, the width of the spacer body 100 is D, the width of the gap 120 is d, and the relation 3*d≦2*D is satisfied.
[0027] Specifically, the battery cell 1 may include a cover plate component 20, a cell 30, a spacer 10, and a housing 40, where the cell 30 can be provided inside the housing 40, the spacer 10 can be provided between the cover plate component 20 and the cell 30, and the cover plate component 20 can be fixedly connected to the housing 40, so that the cell 30 and the spacer 10 can be provided closed inside the housing 40, and when provided in this manner, the spacer 10 presses and fixes the cell 30, thereby preventing the cell 30 from being displaced during the process of vibration of the battery cell 1.
[0028] Furthermore, referring to Figure 3, a tab 31 may be provided at one end of the cell 30, one end of which can be electrically connected by welding to the positive and negative electrode plates (not shown in the drawing) inside the cell 30, and the other end of which can be electrically connected by welding to the terminal 50 of the battery cell 1. In this configuration, the cell 30 can be electrically connected to the terminal 50, and consequently, the cell 30 can be electrically connected to an external electrical circuit via the terminal 50, thereby enabling the battery cell 1 to be charged and discharged. The cover plate component 20 may include a cover plate 21 and a lower plastic 22, the height direction of the battery cell may be in the direction indicated by Z in Figure 2, one side surface of the lower plastic 22 can be fixedly connected to the lower surface of the cover plate 21 by adhesive or the like along the height direction of the battery cell 1, and the other side surface of the lower plastic 22 away from the cover plate 21 can be in contact with the spacer 10. In other words, the lower plastic 22 can abut between the spacer 10 and the cover plate 21, and when provided in this manner, the tab 31 can be separated from the cover plate 21 via the lower plastic 22, maintaining an insulating state between them, thereby effectively preventing the tab 31 from contacting the cover plate 21 and causing a short-circuit failure of the battery cell 1.
[0029] Continuing to refer to Figures 4 to 6, the spacer body 100 may have a rectangular structure, the longitudinal direction of the spacer body 100 may be the direction indicated by X in Figure 3, the width direction of the spacer body 100 may be the direction indicated by Y in Figure 3, and the height direction of the spacer body 100 may be the direction indicated by Z in Figure 3. A housing groove 110 can be integrally molded into the spacer body 100, and the longitudinal direction, width direction, and depth direction of the housing groove 110 are parallel to the longitudinal direction, width direction, and height direction of the spacer body 100, respectively. A gap 120 can be integrally molded into the bottom wall of the spacer body 110, and the gap 120 can penetrate the bottom wall of the housing groove 110 along the depth direction of the housing groove 110, and the gap 120 can extend along the longitudinal direction of the housing groove 110. As shown in Figure 3, one end of the tab 31 that is separated from the cell 30 can be welded to the terminal 50 through the gap 120. At the same time, a portion of the structure located between the terminal 50 of the tab 31 and the cell can be bent and housed in the housing groove 110. When provided in this manner, the tab 31 can be isolated and shaped via the spacer 10, and a portion of the structure of the tab 31 can be constrained inside the spacer 10, thereby maintaining insulating isolation between the tab 31 and the housing 40, which significantly improves the insulation and safety of the battery cell 1.
[0030] As shown in Figure 5, the width of the spacer body 100 can be denoted as D, and the width of the gap 120 can be denoted as d. Here, the relationship between the width of the spacer body 100 and the width of the gap 120 can satisfy the following equation: 3*d ≤ 2*D, meaning that the width of the gap 120 may be 2 / 3 times or less of the width of the spacer body 100. When provided in this manner, the insulating effect of the spacer 10 on the tab 31 can be made to the best effect, and it is avoided that the insulating effect of the spacer 10 will be reduced due to the gap 120 being too large.
[0031] The battery cell 1 spacer 10 submitted in the embodiment of this application is provided with a housing groove 110 and a gap 120 in the spacer body 100, and the gap 120 is in communication with the housing groove 110, thereby isolating and shaping the tab 31 through the spacer 10, and a part of the structure of the tab 31 can be confined inside the spacer 10, thereby maintaining insulating isolation between the tab 31 and the housing 40 of the battery cell 1, thereby significantly improving the insulation and safety of the battery cell 1. By setting the width of the gap 120 to 2 / 3 times or less the width of the spacer body 100, the insulating effect of the spacer 10 on the tab 31 can be made to the best effect, and it is avoided that the insulating effect of the spacer 10 will be reduced due to the gap 120 being too large.
[0032] Continuing with reference to Figures 3 to 6, in another embodiment of the present application, the spacer body 100 further has a relief groove 130, the relief groove 130 and the housing groove 110 are arranged along the longitudinal direction of the spacer body 100, and the relief groove 130 is suitable for discharging gas from inside the battery cell 1.
[0033] Specifically, the relief groove 130 and the storage groove 110 can be provided adjacent to each other along the longitudinal direction of the spacer body 100, the relief groove 130 can be integrally molded into the spacer body 100, and the longitudinal, width, and depth directions of the relief groove 130 are parallel to the longitudinal, width, and height directions of the spacer body 100, respectively. When provided in this manner, if a malfunction occurs inside the cell 30 and a large amount of gas is generated, the relief groove 130 can promptly discharge the gas inside the cell 30, thereby effectively preventing the cell 30 from expanding and preventing an explosion accident of the battery cell 1, and effectively reducing the potential safety problems of the battery cell 1.
[0034] Referring further to Figures 3 to 5, in another embodiment of this application, at least one relief hole 140 is provided in the bottom wall of the relief groove 130.
[0035] Specifically, the number of relief holes 140 may be one, two, or more, and the embodiments of this application are not specifically limited thereto. The shape of the relief holes 140 may be circular, elliptical, rectangular, etc., and this application is not specifically limited thereto. The relief holes 140 can penetrate the bottom wall of the relief groove 130 along the depth direction of the relief groove 130. When provided in this manner, if a malfunction occurs inside the cell 30 and a large amount of gas is generated, the relief holes 140 can release the gas inside the cell 30 in a timely manner, thereby effectively preventing the cell 30 from expanding and preventing an explosion accident of the battery cell 1, and effectively reducing the potential safety problems of the battery cell 1.
[0036] Continuing with reference to Figures 4 and 5, in an optional embodiment of the present application, there are multiple relief holes 140, where the multiple relief holes 140 are spaced apart along the longitudinal direction of the spacer body 100 and / or where the multiple relief holes 140 are spaced apart along the width direction of the spacer body 100.
[0037] Specifically, the number of relief holes 140 may be multiple, and the following embodiment will be interpreted and explained using six relief holes 140 as an example. The six relief holes 140 are arranged in a 2x3 configuration on the bottom wall of the relief groove 130. That is, the six relief holes 140 can be arranged in three rows evenly spaced along the longitudinal direction of the relief groove 130, or the six relief holes 140 can be arranged in two rows evenly spaced along the width direction of the relief groove 130. When arranged in this manner, the exhaust speed of the relief holes 140 can be further improved, allowing the gas generated inside the cell 30 to be discharged quickly.
[0038] Further embodiments of the present application, with reference to Figures 4 and 5, include a spacer 10 comprising a reinforcing rib 200, the reinforcing rib 200 being provided between a receiving groove 110 and a relief groove 130, and / or the reinforcing rib 200 being provided between relief grooves 140.
[0039] Specifically, the reinforcing rib 200 can be fixedly connected to the spacer body 100 by integral molding, and the reinforcing rib 200 can be provided extending along the width direction of the spacer body 100, that is, the longitudinal direction of the reinforcing rib 200 can be parallel to the width direction of the spacer body 100. The number of reinforcing ribs 200 may be one, two or more, and the embodiments of this application are not specifically limited thereto, and the following embodiments will be interpreted and explained using three reinforcing ribs 200 as examples. Here, one reinforcing rib 200 can be provided between the receiving groove 110 and the relief groove 130, and the other two reinforcing ribs 200 can be provided spaced apart between two adjacent rows of relief holes 140. When provided in this manner, the reinforcing ribs 200 effectively improve the strength and rigidity of the spacer body 100, preventing the spacer 10 from undergoing shape changes after being subjected to pressure. As a result, the spacer 10 can stably contact the cover plate component 20 and the cell 30, thereby providing effective positional constraint to the cell 30, and preventing the battery cell 1 from displacing the cell 30 during the process of vibration.
[0040] Continuing with reference to Figure 5, in the selectable configuration of this application, the width of the side wall of the spacer body 100 of the relief groove 130 along the longitudinal direction is D1, and the width of the side wall of the spacer body 100 of the relief groove 130 along the width direction is D2, satisfying the relation D2*0.8≦D1≦D2*1.2, and D1≧0.8mm, D2≧0.8mm.
[0041] Specifically, as shown in Figure 5, the width of the side wall of the spacer body 100 along the longitudinal direction of the relief groove 130 can be denoted as D1, and the width of the side wall of the spacer body 100 along the width direction of the relief groove 130 can be denoted as D2. Here, D1 may be 0.8 mm or more, and D2 may be 0.8 mm or more, and the relationship between D1 and D2 can satisfy the following relationship, D2*0.8 ≤ D1 ≤ D2*1.2, that is, D1 can be between 0.8 times D2 and 1.2 times D2. By providing it in this way, the spacer body 100 has excellent strength and hardness, and the spacer 10 is prevented from undergoing shape changes when subjected to pressure.
[0042] Continuing with reference to Figure 5, in some examples of this application, the width of the reinforcing rib 200 is D3, and the relation D2*0.5 ≤ D3 ≤ D2 is satisfied.
[0043] Specifically, the width of the reinforcing rib 200 can be indicated as D3, and D3 can be between 0.5 times D2 and 1.0 times D2. This arrangement ensures that the spacer body 100 has excellent strength and rigidity, and prevents the spacer 10 from undergoing shape changes under pressure.
[0044] Continuing with reference to Figures 4 and 5, in some embodiments of this application, the spacer body 100 further has a mounting groove 150, the mounting groove 150 is provided at the end of the housing groove 110 that is away from the relief groove 130.
[0045] Specifically, the mounting groove 150, the housing groove 110, and the relief groove 130 can be arranged sequentially along the longitudinal direction of the spacer body 100, that is, the mounting groove 150 and the relief groove 130 can be provided at opposite ends of the housing groove 110, where the longitudinal direction of the mounting groove 150 can be parallel to the width direction of the spacer body 100, and multiple mounting holes (not shown in the drawing) can be provided in the mounting groove 150, and when provided in this manner, the spacer 10 can be screw-connected to the cover plate 21 or housing 40 of the battery cell 1 by using bolts (not shown in the drawing) or screws (not shown in the drawing) to pass through and join into the mounting holes.
[0046] Continuing with reference to Figure 5, in several possible realizations of this application, the length of the spacer body 100 is L, the length of the relief groove 130 is L1, the width of the mounting groove 150 is L2, and the relation L≦(L1+L2)*3, and L1≧3mm, L2≧3mm are satisfied.
[0047] Specifically, the length of the spacer body 100 can be denoted as L, the length of the relief groove 130 can be denoted as L1, and the width of the mounting groove 150 can be denoted as L2, where L1 may be 3 mm or more, L2 may be 3 mm or more, and the sum of the length of the relief groove 130 and the width of the mounting groove 150 may be 1 / 3 or more of the length of the spacer body 100. When provided in this manner, the vibration resistance of the spacer 10 can be effectively improved, and at the same time, the spacer 10 can be prevented from pressing on and damaging the cell 30, thereby effectively restricting the position of the cell 30 and preventing the cell 30 from being displaced during the process of the battery cell 1 vibrating.
[0048] Continuing with reference to Figures 1 to 3, the battery cell 1 provided by the embodiment of this application includes a cover plate 20, a cell 30, and a spacer 10, wherein the spacer 10 is provided between the cover plate 20 and the cell 30, and the spacer 10 is the battery cell 1 spacer 10 of the above embodiment. Here, the specific structure and operating principle of the spacer 10 are explained in detail in the above embodiment and are omitted here.
[0049] Specifically, the battery cell 1 may include a cover plate component 20, a cell 30, a spacer 10, and a housing 40, where the cell 30 can be provided inside the housing 40, the spacer 10 can be provided between the cover plate component 20 and the cell 30, and the cover plate component 20 can be fixedly connected to the housing 40, so that the cell 30 and the spacer 10 can be closed off inside the housing 40. When provided in this manner, the spacer 10 presses and fixes the cell 30, so that the battery cell 1 can avoid displacing the cell 30 during the process of vibration. Furthermore, a tab 31 can be provided at one end of the cell 30, one end of which can be electrically connected to the positive and negative electrode plates inside the cell 30 by welding, and the other end of which can be electrically connected to the terminal 50 of the battery cell 1 by welding. When provided in this manner, the cell 30 can be electrically connected to the terminal 50, and thereby the cell 30 can be electrically connected to an external electrical circuit via the terminal 50, thereby enabling the battery cell 1 to be charged and discharged.
[0050] The cover plate component 20 may include a cover plate 21 and a lower plastic 22. One side surface of the lower plastic 22 can be fixedly connected to the lower surface of the cover plate 21 by adhesive or the like along the height direction of the battery cell 1, and the other side surface of the lower plastic 22 that is away from the cover plate 21 can be in contact with the spacer 10. That is, the lower plastic 22 can be in contact between the spacer 10 and the cover plate 21. When provided in this manner, the tab 31 can be separated from the cover plate 21 via the lower plastic 22, maintaining an insulating state between them, thereby effectively preventing the tab 31 from contacting the cover plate 21 and causing a short circuit failure of the battery.
[0051] A battery pack provided by the embodiments of this application (not shown in the drawings) includes a spacer 10 for the battery cell 1 of the above embodiment, and / or the battery cell 1 of the above embodiment. Here, the specific structure and operating principle of the spacer 10 and the battery cell 1 are described in detail in the above embodiment and are omitted here.
[0052] A vehicle provided by an embodiment of this application (not shown in the drawings) includes the spacer 10 for the battery cell 1 of the above embodiment, and / or the battery cell 1 of the above embodiment, and / or the battery pack of the above embodiment. Here, the specific structure and operating principle of the spacer 10, the battery cell 1, and the battery pack are described in detail in the above embodiment and are omitted here.
[0053] Other structures of the battery cell spacer 10 according to the embodiments of this application, such as the positive electrode plate, negative electrode plate, tab 31, terminal 50, and housing 40, and their operation, are known to those skilled in the art and will not be described in detail here.
[0054] In the description of this application, terms such as "center," "vertical," "horizontal," "length," "width," "thickness," "top," "bottom," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," "outside," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate directions or positional relationships based on the drawings. These terms are merely intended to facilitate and simplify the description of this application and do not indicate or imply that the indicated devices or elements have a specific orientation, or that they should be configured and operated in a specific orientation. Therefore, they should not be understood as limiting this application.
[0055] Furthermore, the terms "first" and "second" are used merely to describe the purpose and should not be understood as indicating or suggesting relative importance or specifying the number of technical features being referred to. For this reason, features designated as "first" or "second" may be explicitly or implicitly defined as including one or more such features. In this description, "multiple" means two or more unless otherwise clearly and specifically defined.
[0056] In this application, unless otherwise explicitly stated and limited, terms such as “attached,” “connected,” “connected,” and “fixed” should be interpreted broadly, for example, and may include fixed connections, removable connections or integrations, mechanical connections or electrical connections, direct connections or indirect connections via an intermediary, internal communication between two elements, or interaction relationships between two elements. Those skilled in the art will be able to understand the specific meaning of the above terms depending on the specific situation.
[0057] In this application, unless otherwise explicitly stated and limited, when the first feature is "above" or "below" the second feature, the first and second features may be in direct contact or indirectly in contact through an intermediate mediator. Also, when the first feature is "above," "above," or "on the top surface" of the second feature, the first feature may be directly above or diagonally above the second feature, or the first feature may be at a higher horizontal altitude than the second feature. When the first feature is "below," "below," or "on the bottom surface" of the second feature, the first feature may be directly below or diagonally below the second feature, or the first feature may be at a lower horizontal altitude than the second feature.
[0058] In this specification, references to terms such as “one embodiment,” “several embodiments,” “example,” “specific example,” or “several examples” mean that the specific features, structures, materials, or properties described in the embodiment or example are included in at least one embodiment or example of this application. The exemplary expressions of the above terms in this specification do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or properties described can be combined in appropriate ways in any or more embodiments or examples. Also, a person skilled in the art can combine different embodiments or examples and features of different embodiments or examples described herein, provided they do not conflict with each other.
[0059] Furthermore, although the above has already been explained by illustrating embodiments of this application, these embodiments are illustrative and cannot be understood as limitations on this application, and those skilled in the art can modify, alter, substitute, and transform the embodiments within the scope of this application.
Claims
1. A spacer for battery cells, The spacer body includes a housing groove, the housing groove has a gap in its bottom wall, the gap communicates with the housing groove, and the gap is suitable for passing the tab of the battery cell through, so that a part of the structure of the tab is housed within the housing groove. The width of the spacer body is D, and the width of the gap is d, satisfying the relation 3*d ≤ 2*D. A battery cell spacer, wherein the spacer body further has a relief groove, the relief groove and the housing groove are arranged along the longitudinal direction of the spacer body, the relief groove is suitable for discharging gas from inside the battery cell, both the spacer body and the relief groove have a rectangular structure, and the longitudinal direction, width direction and depth direction of the relief groove are parallel to the longitudinal direction, width direction and height direction of the spacer body, respectively.
2. The battery cell spacer according to claim 1, wherein at least one relief hole is provided in the bottom wall of the relief groove.
3. The number of relief holes is multiple, and the multiple relief holes are arranged at intervals along the longitudinal direction of the spacer body. and / or, the battery cell spacer according to claim 2, wherein a plurality of the relief holes are arranged at intervals along the width direction of the spacer body.
4. The aforementioned spacer is Further including reinforcing ribs, the reinforcing ribs are provided between the receiving groove and the relief groove, and / or the reinforcing rib is provided between the relief holes, the battery cell spacer according to claim 3.
5. The battery cell spacer according to claim 1, wherein the width of the side wall of the relief groove along the longitudinal direction of the spacer body is D1, the width of the side wall of the relief groove along the width direction of the spacer body is D2, and the relation D2 * 0.8 ≤ D1 ≤ D2 * 1.2, and D1 ≥ 0.8 mm, D2 ≥ 0.8 mm.
6. The battery cell spacer according to claim 4, wherein the width of the reinforcing rib is D3, and the relation D2 * 0.5 ≤ D3 ≤ D2.
7. The spacer body further has a mounting groove, the mounting groove is provided at the end of the housing groove that is away from the relief groove, according to claim 1, for a battery cell spacer.
8. The battery cell spacer according to claim 7, wherein the length of the spacer body is L, the length of the relief groove is L1, the width of the mounting groove is L2, and the relation L ≤ (L1 + L2) * 3, and L1 ≥ 3 mm, L2 ≥ 3 mm.
9. It is a battery cell, Cover plate component and Cells and, A battery cell comprising a spacer, wherein the spacer is provided between the cover plate component and the cell, and the spacer is the battery cell spacer described in claim 1.
10. It is a battery pack, Battery cell spacer according to claim 1, and / or a battery pack comprising the battery cell described in claim 9.
11. It is a vehicle, Battery cell spacer according to claim 1, and / or a vehicle comprising the battery cell described in claim 9.