Spacer, battery cell, and vehicle

Abstract

The present application provides a spacer, a battery cell, and a vehicle. The spacer comprises a spacer body and a traction member; the spacer body comprises a first side wall, a second side wall, and a base; the base is separately connected to the first side wall and the second side wall to define a pressure relief recess; the traction member is formed in the pressure relief recess and is fixedly connected to the spacer body; and a traction force can be applied to the traction member so as to drive the spacer to move.

Description

Spacer, battery cell and vehicle

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed with the China Patent Office on December 6, 2023, with application number 202323329922.0, the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The embodiments of the present application relate to, but are not limited to, the field of battery assembly technology, and specifically, relate to, but are not limited to, a spacer, a battery cell, and a vehicle. Background Art

[0004] During the process of assembling the battery cell into the shell, the negative electrode cover is generally pushed into the shell by a push rod.

[0005] Summary of the Invention

[0006] The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims. The present application provides a spacer, a battery cell, and a vehicle.

[0007] In the first aspect, the present application provides a spacer, comprising a spacer body and a traction member; the spacer body comprises a first side wall, a second side wall and a base, and the base is respectively connected to the first side wall and the second side wall to form a pressure relief groove; the traction member is formed in the pressure relief groove and is fixedly connected to the spacer body, and the traction member can be applied with traction force to drive the spacer to move.

[0008] In some embodiments, the traction member includes a traction rib fixedly connected to at least one of the first side wall, the second side wall, and the base.

[0009] In some embodiments, the traction member includes a traction rib and a reinforcement member connected to each other, and the reinforcement member is fixedly connected to at least one of the first side wall, the second side wall and the base.

[0010] In some embodiments, the traction bar is fixedly connected to the reinforcement member.

[0011] In some embodiments, the traction rib is protruded on the first reinforcement member.

[0012] In some embodiments, the traction rib includes a first traction portion and a second traction portion that are coaxially arranged, and the first traction portion and the second traction portion are respectively protruded on both sides of the first reinforcement.

[0013] In some embodiments, the spacer body has a first opening, with the plane where the opening end of the first opening is located being the first surface, and the distance between the surface of the traction rib away from the first surface and the first surface is greater than the thickness of the traction rib.

[0014] In some embodiments, the first side wall and the second side wall are spaced apart along a first direction, and the traction ribs also extend along the first direction.

[0015] In some embodiments, the spacer body further includes at least one second reinforcement member formed in the pressure relief groove, the second reinforcement member is fixedly connected to the first side wall and the second side wall, and the second reinforcement member is spaced apart from the first reinforcement member.

[0016] In some embodiments, the base is provided with at least one pressure relief hole, and the shape of the pressure relief hole includes: waist-shaped, circular, elliptical, and / or rectangular.

[0017] In some embodiments, the base is further provided with a glue injection hole.

[0018] In some embodiments, the base is further provided with a hollow area, and the hollow area corresponds to the area where the traction reinforcement is located.

[0019] In some embodiments, the spacer body also includes a bottom wall, which is respectively connected to the first side wall and the second side wall to form a receiving groove. The bottom wall is provided with a gap, and the gap is connected to the receiving groove to allow the pole ear of the power core to pass through the gap and be partially accommodated in the receiving groove.

[0020] In some embodiments, the spacer body further includes a mounting groove for mounting the spacer on the battery cell, and a mounting hole is provided on the bottom wall of the mounting groove, and the mounting hole is used for screws and bolts to pass through.

[0021] In a second aspect, the present application provides a battery cell, comprising:

[0022] A spacer as described in any of the above items; and

[0023] A battery cell, wherein a tab is extended from one end of the battery cell, and at least a portion of the tab is accommodated in the spacer.

[0024] In some embodiments, the tab includes: a positive tab extending from one end of the positive electrode cover plate of the battery cell, and a negative tab extending from one end of the negative electrode cover plate of the battery cell, wherein the spacer is arranged between the battery cell and the positive electrode cover plate, and the positive tab is accommodated in a receiving groove in the body of the spacer.

[0025] In a third aspect, the present application provides a vehicle comprising the spacer described in any one of the above items.

[0026] The present application provides a spacer that can be assembled on the battery cell of a single battery. When assembling the battery cell into the housing, the operator can connect a traction device to the traction member of the spacer, and apply traction force to the traction member through the traction device to move the spacer, drive the battery cell to move, and thus pull the battery cell into the housing. In this way, compared to the solution of pushing the battery cell into the housing by pushing the negative electrode cover plate with a push rod, the technical solution of the present application can effectively reduce the risk of damage to the battery cell due to excessive thrust. Other aspects can be understood after reading and understanding the drawings and detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic diagram of the battery cell before assembly.

[0028] Figure 2 is a schematic diagram of the battery cell assembly.

[0029] Figure 3 is a schematic diagram of the battery cell after assembly.

[0030] FIG4 is a schematic diagram of the battery cell of the present application before assembly.

[0031] FIG5 is a schematic diagram of the battery cell assembly of the present application.

[0032] FIG6 is a schematic diagram of the assembled battery cell of the present application.

[0033] FIG7 is a schematic diagram of a battery cell before assembly shown in another embodiment of the present application.

[0034] FIG8 is a schematic diagram of a battery cell assembly according to another embodiment of the present application.

[0035] FIG9 is a schematic diagram of a battery cell after assembly shown in another embodiment of the present application.

[0036] FIG10 is a schematic structural diagram of a battery unit according to an embodiment of the present application.

[0037] FIG11 is a schematic structural diagram of a spacer ring shown in an embodiment of the present application.

[0038] FIG12 is a schematic structural diagram of the spacer ring shown from another perspective of the present application.

[0039] FIG13 is a schematic structural diagram of the spacer ring shown from another perspective of the present application.

[0040] FIG14 is a partial cross-sectional structural diagram of FIG13.

[0041] FIG15 is a schematic diagram of the exploded structure of a battery cell unit according to an embodiment of the present application.

[0042] Explanation of the accompanying reference numerals: 10, spacer; 11, spacer body; 111, first side wall; 112, second side wall; 113, bottom wall; 114, gap; 115, accommodating groove; 116, mounting groove; 117, mounting hole; 118, interval; 12, base; 121, pressure relief groove; 122, pressure relief hole; 123, hollow area; 124, glue injection hole; 13, second reinforcement; 15, first opening; 16, traction member; 161, traction rib; 1611, first traction part; 1612, second traction part; 162, first reinforcement; 20, traction device; 30, battery cell; 31, positive electrode ear; 32, negative electrode ear; 33, positive electrode top patch; 34, negative electrode top patch; 35, positive electrode cover plate; 36, negative electrode cover plate; 37, insulating film; 40, shell; 50, push rod. DETAILED DESCRIPTION

[0043] Exemplary embodiments are described in detail herein, with examples illustrated in the accompanying drawings. When the following description refers to the drawings, identical numerals in different figures represent identical or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of apparatuses and methods consistent with certain aspects of the present application.

[0044] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. Unless otherwise defined, technical or scientific terms used in this application should have the ordinary meaning understood by a person of ordinary skill in the art to which this application belongs. The terms "first," "second," and similar terms used in this application do not denote any order, quantity, or importance, but are simply used to distinguish different components. Similarly, terms such as "a" or "an" do not denote a quantitative limitation, but rather indicate the presence of at least one. If only "a" is referred to, this will be separately stated. "Multiple" or "several" means two or more. Unless otherwise indicated, terms such as "front," "rear," "lower," and / or "upper," "top," and "bottom" are used for convenience of description only and are not limited to a single position or spatial orientation. Terms such as "include" or "comprising" mean that the elements or objects listed before "include" or "comprising" include the elements or objects listed after "include" or "comprising" and their equivalents, and do not exclude other elements or objects. The words “connected” or “connected” and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0045] As shown in Figures 1 to 3, a single battery cell includes a battery cell 30, an aluminum casing 40, and a negative electrode cover 36 mounted on the negative electrode of the battery cell 30. When assembling the battery cell 30 into the aluminum casing 40, an operator generally uses a push rod 50 to push the negative electrode cover 36 to indirectly push the battery cell 30, thereby assembling the battery cell 30 into the aluminum casing 40. However, during the process of assembling the battery cell 30 into the aluminum casing 40, only the push rod 50 pushes the negative electrode cover 36, and the contact point between the battery cell 30 and the negative electrode cover 36 is subjected to high force, which can easily damage the battery cell 30.

[0046] In view of this, the present invention provides a spacer 10, a battery cell, and a vehicle. The spacer 10, the battery cell, and the vehicle are described in detail below with reference to the accompanying drawings. The features of the following embodiments and implementations can be combined with each other unless there is any conflict.

[0047] Referring to Figures 4 to 15, an embodiment of the present application provides a spacer 10, which can be applied to the battery cell 30 of the battery cell. As shown in Figure 11, the spacer 10 includes a spacer body 11 and a traction member 16. The spacer body 11 includes a first side wall 111, a second side wall 112 and a base 12. The base 12 is connected to the first side wall 111 and the second side wall 112 respectively. The first side wall 111, the second side wall 112 and the base 12 are surrounded by a pressure relief groove 121; the traction member 16 is formed in the pressure relief groove 121 and is fixedly connected to the spacer body 11. The traction member 16 can be applied with traction to drive the spacer 10 to move.

[0048] Thus, when assembling the battery cell 30 into the housing 40, the operator can connect the pulling device 20 to the pulling member 16 of the spacer 10 and use the pulling device 20 to pull the battery cell 30 into the housing 40. Compared to the scheme of pushing the battery cell 30 into the housing 40 by pushing the negative electrode cover 36 with the push rod 50, the risk of damage to the battery cell 30 caused by excessive thrust is reduced. In addition, the pulling member 16 formed in the pressure relief groove 121 can also enhance the structural strength of the pressure relief groove 121 and improve the pressure relief groove 121's ability to resist deformation.

[0049] The specific assembly process of the battery cell 30 can be seen in Figures 4, 5, and 6. The operator simply pulls the traction member 16 of the spacer 10 using the traction device 20 to assemble the battery cell 30 into the housing 40. In another embodiment, referring to Figures 7, 8, and 9, the operator can simultaneously pull the traction member 16 of the spacer 10 using the traction device 20 while using the push rod 50 to push the negative electrode cover 36 of the single cell to assemble the battery cell 30 into the housing 40. It should be understood that the above are only two assembly methods described in this embodiment, and in fact, the present application is not limited to the above assembly methods.

[0050] Refer to Figures 11, 12, 13, 14, and 15. In one embodiment, the traction member 16 includes a connected traction rib 161 and a first reinforcement member 162. The first reinforcement member 162 is fixedly connected to the first side wall 111 and the second side wall 112. The traction rib 161 is connected to the first reinforcement member 162. When the traction device 20 pulls the traction rib 161, the first reinforcement member 162 provides sufficient support for the traction rib 161, preventing it from breaking. Furthermore, the traction rib 161 has a simple structure and is easy to process, making it relatively easy to use in industry. Furthermore, in this embodiment, the first reinforcement member 162 also connects the first and second side walls 111, 112, thereby maximizing the structural strength of the spacer body 11 and the pressure relief groove 121. In another embodiment (not shown), the first reinforcement member 162 may be fixedly connected to only one of the first and second side walls 111, 112, or the first reinforcement member 162 may be fixedly connected to the base 12. In yet another embodiment (not shown), the pulling member 16 may include only the pulling ribs 161, which may be fixedly connected to the first side wall 111 and / or the second side wall 112, or may be fixedly connected to the base 12. In other embodiments (not shown), the spacer body 11 may further include an upper wall and a lower wall, wherein the upper wall, the lower wall, the first side wall 111, and the second side wall 112 form a frame, and the pulling ribs 161 may be fixedly connected to the upper wall and / or the lower wall.

[0051] The first reinforcement 162 has various structures and shapes, and can be block-shaped, plate-shaped, spherical, linear, etc. The traction reinforcement 161 can be strip-shaped, square-shaped, spherical, etc., but is not limited thereto.

[0052] In the embodiment shown in FIG. 11 , the first reinforcement member 162 is a flat plate-shaped structure. The first reinforcement member 162 extends along the Z direction and the Y direction shown in FIG. 11 , and is perpendicular to both the first side wall 111 and the second side wall 112 .

[0053] In one embodiment, the traction bar 161 is fixedly connected to the first reinforcement member 162. In other words, the traction bar 161 can extend upward (eg, in the X direction) from the first reinforcement member 162 to facilitate connection with the traction device 20.

[0054] In some embodiments, the traction bar 161 is protruded from the first reinforcement member 162. In this way, while ensuring that the traction bar 161 can be connected to the traction device 20, it also occupies as little space in the pressure relief groove 121 as possible, facilitating the overall layout design of the spacer 10.

[0055] In one embodiment, the traction rib 161 includes a coaxially arranged first traction portion 1611 and a second traction portion 1612, which are respectively protruded from opposite sides of the first reinforcement member 162 along the X-axis. As shown in FIG13 , the first traction portion 1611 is protruded above the first reinforcement member 162 (e.g., along the positive direction of the X-axis), and the second traction portion 1612 is protruded below the first reinforcement member 162 (e.g., along the negative direction of the X-axis).

[0056] In this way, the traction device 20 can be simultaneously engaged with the first traction part 1611 and the second traction part 1612 of the traction bar 161. On the premise of ensuring the rigidity of the traction bar 161, the traction area of ​​the traction bar 161 and the traction device 20 is increased, making the traction device 20 more stable during the process of pulling the spacer 10.

[0057] In one embodiment, the first pulling portion 1611 and the second pulling portion 1612 are symmetrically arranged about the plane where the first reinforcement member 162 is located. This arrangement enables the first pulling portion 1611 and the second pulling portion 1612 to be subjected to substantially equal forces, thereby ensuring that the spacer 10 is subjected to a more uniform force during the pulling process, thereby preventing movement deviation.

[0058] In one embodiment, the first sidewall 111 and the second sidewall 112 are spaced apart along a first direction (the Y direction shown in FIG. 11 ), and the traction ribs 161 also extend along the first direction. It will be readily understood that this also increases the traction area between the traction ribs 161 and the traction device 20, making the traction device 20 more stable during the pulling of the spacer 10.

[0059] In some embodiments, the traction rib 161 further securely connects the first sidewall 111 and the second sidewall 112 to further enhance the structural strength of the spacer body 11 and the pressure relief groove 121. In another embodiment, the traction rib 161 may securely connect one of the first sidewall 111 and the second sidewall 112.

[0060] To enhance the strength of the traction bar 161 and ensure a larger traction area between the traction bar 161 and the traction device 20, facilitating traction, in one specific embodiment, as shown in FIG14 , the thickness L1 of the first reinforcement member 162 (the X-axis dimension of the first reinforcement member 162 ) can be between 1 mm and 10 mm, i.e., L1 is greater than or equal to 1 mm and less than or equal to 10 mm, to provide better support for the traction bar 161. The thickness L4 of the traction bar 161 (the Z-axis dimension of the traction bar 161 ) can be equal to the thickness of the first reinforcement member 162 , i.e., L4 is greater than or equal to 1 mm and less than or equal to 10 mm, to enhance the strength of the traction bar 161 itself. Of course, the above-mentioned thickness restrictions for the traction bar 161 and the first reinforcement member 162 are examples of the present application and are not intended to limit the present application. For example, the thickness of the first reinforcement member 162 and the traction bar 161 can be 0.9 mm, 10 mm, 11 mm, 12 mm, 15 mm, etc., but are not limited thereto.

[0061] In some embodiments, the spacer body 11 has a first opening 15 facing outward (i.e., away from the battery cell 30, for example, in the positive Z direction). The plane where the open end of the first opening 15 is located is the first surface. The distance between the inner surface of the traction rib 161 and the first surface is greater than the thickness of the traction rib 161. In other words, the distance between the surface of the traction rib 161 away from the first surface and the first surface is greater than the thickness of the traction rib 161. In other words, the traction rib 161 needs to have a distance from the first surface where the first opening 15 is located that meets the above conditions. This prevents the traction rib 161 from protruding from the first surface due to deformation or other factors during the pulling process, thereby improving stability during the pulling process.

[0062] In one embodiment, as shown in FIG12 , the base 12 is provided with at least one pressure relief hole 122 so that the pressure relief groove 121 can be connected to the battery cell 30 . The number of pressure relief holes 122 can be one or more, and the shape of the pressure relief holes 122 can be waist-shaped, circular, elliptical, and / or rectangular, etc. When a fault occurs inside the battery cell 30 and a large amount of gas is generated, the pressure relief groove 121 can discharge the gas inside the battery cell 30 in a timely manner through the pressure relief hole 122, thereby effectively preventing the battery cell 30 from expanding and preventing the battery cell from exploding, thereby effectively reducing the safety risks of the battery cell. Therefore, it is easy to understand that the pressure relief groove 121 will withstand a large gas pressure when discharging gas. Therefore, the above-mentioned traction ribs 161 and the first reinforcement member 162 are arranged in the pressure relief groove 121 to strengthen the strength of the pressure relief groove 121 and prevent it from being damaged by the gas pressure.

[0063] In the embodiment shown in Figures 11 and 12, the pressure relief holes 122 are provided in multiple rows, and the multiple rows of pressure relief holes 122 are spaced apart along the second direction (X direction). Each row of pressure relief holes 122 includes multiple pressure relief holes 122, and the shape of the pressure relief holes 122 is a waist-shaped hole, but is not limited thereto. Waist-shaped holes usually have a smaller outlet diameter and a larger internal space, which allows the gas to be released through the orifice in a relatively uniform manner. Compared with holes of other shapes, waist-shaped holes can better control the flow of gas and reduce the pressure difference generated when the gas is released, thereby improving the pressure relief effect. The base 12 is also provided with a glue injection hole 124, so the size of the pressure relief holes 122 in the area corresponding to the glue injection hole 124 is set to be smaller than the size of the pressure relief holes 122 in other areas.

[0064] In one embodiment, the base 12 further includes a hollowed-out area 123, corresponding to the area where the traction bar 161 is located. This hollowed-out area 123 facilitates the traction of the traction bar 161 by the traction device 20. Furthermore, the hollowed-out area 123 communicates with the battery cell 30 and the pressure relief groove 121, serving a similar function to the pressure relief hole 122 and further enhancing the pressure relief capacity of the pressure relief groove 121. In some embodiments, a spacer 118 is provided between the traction bar 161 and the base 12, further facilitating the connection between the traction device 20 and the traction bar 161.

[0065] In one embodiment, as shown in FIG11 , the spacer 10 further includes at least one second reinforcement member 13, which connects the first side wall 111 and the second side wall 112. The first reinforcement member 162 and the second reinforcement member 13 are arranged parallel to and spaced apart from each other, with the spacing between the first reinforcement member 162 and the second reinforcement member 13 being greater than a predetermined spacing. It will be readily understood that a greater number of reinforcement members can further enhance the structural strength of the spacer body 11. Therefore, while enhancing the structural strength of the spacer body 11, setting the spacing between the first reinforcement member 162 and the second reinforcement member 13 greater than a predetermined spacing can prevent interference between the second reinforcement member 13 and the traction device 20.

[0066] It should be noted that the preset interval needs to be set according to the model and size of the traction device 20. Therefore, the embodiment of the present application does not limit the specific value of the preset interval, and those skilled in the art can make specific arrangements based on actual conditions.

[0067] In some embodiments, there may be multiple second reinforcement members 13 , which are spaced apart along the second direction (eg, the X direction), and one second reinforcement member 13 may be provided between two adjacent rows of pressure relief holes 122 .

[0068] In the embodiment shown in FIG. 11 and FIG. 12 , the second reinforcement member 13 may also be a flat plate structure. Two second reinforcement members 13 are provided, and the first reinforcement member 162 is located between the two second reinforcement members 13 .

[0069] In one embodiment, the spacer body 11 further includes a bottom wall 113, which is respectively connected to the first side wall 111 and the second side wall 112 to form a receiving groove 115. The bottom wall 113 is provided with a gap 114, which is connected to the receiving groove 115 to allow the tab of the power core 30 to pass through the gap 114 and be partially received in the receiving groove 115. In some embodiments, the bottom wall 113 is not a fully enclosed surface, and there is a gap 114 on the bottom wall 113. By receiving part of the tab structure in the receiving groove 115, the tab can be separated from the shell 40, so that the tab and the shell 40 remain insulated, thereby effectively preventing battery short circuit failure caused by contact between the tab and the shell 40, and improving the safety of the battery cell.

[0070] In one embodiment, the shape of the receiving groove 115 can be consistent with the shape of the spacer body 11, that is, the receiving groove 115 can be rectangular. In one embodiment, the spacer body 11 also includes a mounting groove 116 for mounting the spacer 10 on the battery cell 30. The bottom wall 113 of the mounting groove 116 is provided with a mounting hole 117, which can be used to pass screws and bolts.

[0071] The present application also provides a single battery cell, including the spacer 10 described in any of the above embodiments. The single battery cell further includes a battery cell 30, a cover plate, and an aluminum housing 40. The battery cell 30 and the spacer 10 are located within the housing 40. A tab extends from one end of the battery cell 30, partially contained within the spacer 10, and connected to the cover plate through the spacer 10.

[0072] It should be noted that, depending on the design of the battery cell, the tabs can be led out at one end of the battery cell 30 or at both ends of the battery cell 30. Therefore, a spacer 10 can be set at one end of the battery cell 30 or at both ends of the battery.

[0073] Referring to Figure 15 , in one embodiment, a single battery cell includes a cell 30, a housing 40, a positive electrode cover 35, a negative electrode cover 36, a positive electrode top patch 33, and a negative electrode top patch 34. The cell 30 has a positive tab 31 extending from the end where the positive electrode cover 35 is mounted, and a negative tab 32 extending from the end where the negative electrode cover 36 is mounted. A spacer 10 is disposed between the cell 30 and the positive electrode cover 35. The positive tab 31 passes through a gap 114 in the spacer 10 and is received within a receiving groove 115 therein. The positive electrode top patch 33 is attached to the positive electrode cover 35, and the negative electrode top patch 34 is attached to the negative electrode cover 36.

[0074] An insulating film 37 is attached to the outer surface of the battery cell 30. The material of the insulating film 37 can be Mylar (polyester film), but is not limited to this. By providing the above-mentioned spacer 10, the friction resistance between the deformation of the insulating film 37 and the inner wall of the shell 40 can also be reduced, thereby avoiding the risk of scratching the insulating film 37.

[0075] An embodiment of the present application further provides a vehicle, comprising the spacer 10 and a single battery as described in any of the above embodiments.

[0076] The above descriptions are only some embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A spacer, comprising a spacer body and a traction member,wherein the spacer body comprises a first side wall, a second side wall, and a base; the base is connected with the first side wall and the second side wall, respectively, to form a pressure relief groove; andthe traction member is formed in the pressure relief groove and is fixedly connected to the spacer body, and the traction member is configured to be applied with a traction force to drive the spacer to move.

2. The spacer according to claim 1, wherein the traction member comprises a traction rib, and the traction rib is fixedly connected to at least one of the first side wall, the second side wall, or the base.

3. The spacer according to claim 1, wherein the traction member comprises a traction rib and a first reinforcing member connected to each other, and the first reinforcing member is fixedly connected to at least one of the first side wall, the second side wall, or the base.

4. The spacer according to claim 3, wherein the traction rib is fixedly connected to the first reinforcing member.

5. The spacer according to claim 4, wherein the traction rib is protrusively provided on the first reinforcing member.

6. The spacer according to claim 3, wherein the traction rib comprises a first traction portion and a second traction portion coaxially arranged; andthe first traction portion and the second traction portion are respectively protrusively provided on two sides of the first reinforcing member.

7. The spacer according to any one of claims 2-6, wherein the spacer body has a first opening, a plane where an open end of the first opening is located serves as a first surface, and a distance between the first surface and a surface of the traction rib away from the first surface is greater than a thickness of the traction rib.

8. The spacer according to any one of claims 2-7, wherein the first side wall and the second2024392546   16 Jun 2026side wall are spaced apart in a first direction; andthe traction rib extends in the first direction.

9. The spacer according to any one of claims 2-8, wherein the spacer body further comprises at least one second reinforcing member formed in the pressure relief groove; andthe at least one second reinforcing member is fixedly connected to the first side wall and the second side wall, and the at least one second reinforcing member is spaced apart from the first reinforcing member.

10. The spacer according to any one of claims 2-9, wherein the base is provided with at least one pressure relief hole; anda shape of the at least one pressure relief hole comprises at least one of a waist shape, a circle, an ellipse, or a rectangle.

11. The spacer according to claim 10, wherein the base is further provided with a glue injection hole.

12. The spacer according to any one of claims 2-11, wherein the base is further provided with a hollow region, and the hollow region corresponds to a region where the traction rib is located.

13. The spacer according to any one of claims 2-12, wherein the spacer body further comprises a bottom wall;the bottom wall is connected to the first side wall and the second side wall respectively to form an accommodating groove; andthe bottom wall is provided with a gap, and the gap is in communication with the accommodating groove to enable a tab of a cell to pass through the gap, and the tab is partially accommodated in the accommodating groove.

14. The spacer according to any one of claims 2-13, wherein the spacer body further comprises a mounting groove for mounting the spacer to the cell; andthe bottom wall of the mounting groove is provided with a mounting hole, and the mounting hole is used for a screw and a bolt to pass through.

15. A battery unit comprising:2024392546   16 Jun 2026a spacer according to any one of claims 1-12; anda cell, wherein a tab is led out from one end of the cell, and at least part structure of the tab is accommodated in the spacer.

16. The battery unit according to claim 15, wherein the spacer body further comprises a bottom wall;the bottom wall is connected to the first side wall and the second side wall respectively to form an accommodating groove; andthe bottom wall is provided with a gap, and the gap is in communication with the accommodating groove to enable a tab of a cell to pass through the gap, and the tab is partially accommodated in the accommodating groove.

17. The battery unit according to claim 16, wherein the spacer body further comprises a mounting groove for mounting the spacer to the cell; andthe bottom wall of the mounting groove is provided with a mounting hole, and the mounting hole is used for a screw and a bolt to pass through.

18. The battery unit according to claim 15, wherein the tab comprises:a positive tab led out from an end of a positive electrode cover of the cell, anda negative tab led out from an end of a negative electrode cover of the cell; andwherein the spacer is between the cell and the positive electrode cover, and the positive tab is accommodated in an accommodating groove in the spacer body.

19. The battery unit according to claim 16 or 17, wherein the tab comprises:a positive tab led out from an end of a positive electrode cover of the cell, anda negative tab led out from an end of a negative electrode cover of the cell; andwherein the spacer is between the cell and the positive electrode cover, and the positive tab is accommodated in the accommodating groove.

20. A vehicle, comprising a spacer according to any one of claims 1-14.

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