Spacer, battery unit and vehicle

Abstract

The present invention provides a spacer, a battery unit, and a vehicle, the spacer including a spacer body and a traction member, the spacer body including a first side wall, a second side wall, and a base, the base connected to the first side wall and the second side wall to form a pressure relief groove, the traction member formed in the pressure relief groove and fixedly connected to the spacer body, and the traction member being capable of moving the spacer by applying a traction force to the traction member.

Description

[Technical Field]

[0001] This application claims priority from a Chinese patent application filed with the China Patent Office on December 6, 2023, bearing application number 202323329922.0, the entire contents of which are incorporated herein by reference.

[0002] FIELD OF THE INVENTION Embodiments of the present invention relate to, but are not limited to, the field of battery mounting technology, and specifically relate to, but are not limited to, spacers, battery units, and vehicles. [Background technology]

[0003] When the cell is installed in the housing, the negative electrode cover is typically pushed by a push rod to insert the cell into the housing. Summary of the Invention

[0004] The following is a summary of the subject matter described in detail in the present invention. This summary does not limit the scope of the claims. The present invention provides a spacer, a battery unit, and a vehicle.

[0005] In a first aspect, the present invention provides a spacer including a spacer body and a traction member, wherein the spacer body includes a first side wall, a second side wall, and a base, the base being connected to the first side wall and the second side wall, respectively, to form a pressure relief groove, the traction member being formed within the pressure relief groove and fixedly connected to the spacer body, and the traction member being capable of moving the spacer by applying a traction force to the traction member.

[0006] In some embodiments, the traction member includes a traction rib, the traction rib fixedly connected to at least one of the first sidewall, the second sidewall, and the base.

[0007] In some embodiments, the traction member includes a traction rib and a first reinforcing member connected together, the first reinforcing member fixedly connected to at least one of the first sidewall, the second sidewall, and the base.

[0008] In some embodiments, the traction rib is fixedly connected to the first reinforcing member.

[0009] In some embodiments, the traction rib is protruding from the first reinforcing member.

[0010] 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 protruding from both sides of the first reinforcing member.

[0011] In some embodiments, the spacer body has a first opening, a plane on which an open end of the first opening is located is a first surface, and a distance from a surface of the traction rib away from the first surface to the first surface is greater than a thickness of the traction rib.

[0012] In some embodiments, the first sidewall and the second sidewall are spaced apart along a first direction, and the traction rib extends along the first direction.

[0013] In some embodiments, the spacer body further includes at least one second reinforcing member formed within the pressure relief groove, the second reinforcing member fixedly connected to the first side wall and the second side wall, and the second reinforcing member and the first reinforcing member being spaced apart.

[0014] In some embodiments, the base includes at least one pressure relief hole, the shape of the pressure relief hole including oval, circular, elliptical, and / or rectangular.

[0015] In some embodiments, the base further comprises an adhesive injection hole.

[0016] In some embodiments, the base further comprises a hollow area, the hollow area corresponding to an area where the traction rib is located.

[0017] In some embodiments, the spacer body further includes a bottom wall, the bottom wall being connected to the first side wall and the second side wall, respectively, to form an accommodating groove, the bottom wall having a gap therein, the gap communicating with the accommodating groove such that the tab of the cell passes through the gap and is partially accommodated within the accommodating groove.

[0018] In some embodiments, the spacer body further includes a mounting groove for mounting the spacer to a cell, and a mounting hole is provided in a bottom wall of the mounting groove, through which a screw or bolt can pass.

[0019] In a second aspect, the present invention provides a battery unit including any one of the spacers described above and a cell having a tab drawn out from one end thereof, A battery unit is provided in which at least a portion of the structure of the tab is housed within the spacer.

[0020] In some embodiments, the tabs include a positive electrode tab extending from one end of a positive electrode cover of the cell and a negative electrode tab extending from one end of a negative electrode cover of the cell, the spacer being provided between the cell and the positive electrode cover, and the positive electrode tab being received in a receiving groove in the body of the spacer.

[0021] In a third aspect, the present invention provides a vehicle including any of the spacers described above.

[0022] The present invention provides a spacer that can be attached to a cell of a battery unit. When installing the cell into a housing, an operator can connect a traction device to the traction member of the spacer and use the traction device to apply a traction force to the traction member to move the spacer and move the cell, thereby towing the cell into the housing. In this way, compared to a technical solution in which a push rod is used to push the negative electrode cover and push the cell into the housing, the technical solution of the present invention can effectively reduce the risk of damaging the cell due to excessive thrust. Other points will become apparent from reading and understanding the drawings and detailed description. [Brief explanation of the drawings]

[0023] [Figure 1] FIG. 1 is a schematic diagram of the cell before installation. [Figure 2] FIG. 1 is a schematic view of the cell during installation. [Figure 3] FIG. 1 is a schematic diagram of the cell after installation. [Figure 4] FIG. 1 is a schematic diagram of a cell of the present invention before installation. [Figure 5] FIG. 1 is a schematic view of a cell of the present invention during installation. [Figure 6] FIG. 2 is a schematic view of the cell of the present invention after installation. [Figure 7] FIG. 10 is a schematic diagram of a cell of another embodiment of the present invention before installation. [Figure 8] FIG. 10 is a schematic view of another embodiment of the cell of the present invention during installation. [Figure 9] FIG. 10 is a schematic diagram of a cell according to another embodiment of the present invention after installation. [Figure 10] 1 is a structural schematic diagram of a battery unit according to an embodiment of the present invention; [Figure 11] 1 is a structural schematic diagram of a spacer according to an embodiment of the present invention; [Figure 12] 10 is a structural schematic diagram of a spacer according to another aspect of the present invention. FIG. [Figure 13] 10 is a structural schematic diagram of a spacer according to another aspect of the present invention. FIG. [Figure 14] FIG. 14 is a schematic diagram of a partial cross-sectional structure of FIG. [Figure 15] 1 is a schematic diagram of an exploded structure of a cell unit according to an embodiment of the present invention; DETAILED DESCRIPTION OF THE INVENTION

[0024] Illustrative embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description refers to the drawings, identical numerals in different drawings refer to identical or similar elements unless otherwise noted. The embodiments described in the following illustrative examples do not represent all embodiments consistent with the present invention. On the contrary, they are merely examples of apparatus and methods consistent with some aspects of the present invention.

[0025] The terms used herein are merely for the purpose of describing particular embodiments and are not intended to limit the present invention. Unless otherwise defined, technical or scientific terms used herein have the common meanings understood by those skilled in the art to which the present invention pertains. The terms "first," "second," and similar terms used herein do not denote any order, number, or importance, but are used to distinguish between different components. Similarly, similar terms such as "a" or "1" do not denote a numerical limitation, but rather indicate the presence of at least one, and when referring to only "one," this is otherwise explained. "Multiple" or "several" refer to two or more. Unless otherwise specified, similar terms such as "front," "rear," "lower," and / or "upper," "top," "bottom," etc. are used for descriptive purposes only and do not limit the present invention to one location or one spatial orientation. Regarding similar terms such as "comprise" or "having," it is meant that the elements or objects following "comprise" or "having" include the elements or objects listed before "comprise" or "having" and their equivalents, and do not exclude other elements or objects. "Connected" or "coupled" and similar terms are not restricted to physical or mechanical connections, but can also include electrical connections, whether direct or indirect.

[0026] 1 to 3, the battery unit includes a cell 30, an aluminum housing 40, and a negative electrode cover 36 attached to the negative electrode of the cell 30. When installing the cell 30 in the aluminum housing 40, an operator typically uses a push rod 50 to push the negative electrode cover 36, thereby indirectly pushing the cell 30, thereby installing the cell 30 in the aluminum housing 40. However, because the negative electrode cover 36 is pushed only by the push rod 50 when installing the cell 30 in the aluminum housing 40, force is applied to the position where the cell 30 and the negative electrode cover 36 come into contact, making the cell 30 susceptible to damage.

[0027] In view of this, the embodiments of the present invention provide a spacer 10, a battery unit, and a vehicle. The spacer 10, the battery unit, and the vehicle will be described in detail below with reference to the drawings. Where not inconsistent, the features in the following embodiments and embodiments may be combined with each other.

[0028] As shown in Figures 4 to 15, an embodiment of the present invention provides a spacer 10, which can be applied to a cell 30 of a battery unit. 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. A pressure relief groove 121 is formed by the first side wall 111, the second side wall 112, and the base 12. The traction member 16 is formed in the pressure relief groove 121 and fixedly connected to the spacer body 11. The traction member 16 can apply a traction force to move the spacer 10.

[0029] In this way, when installing the cell 30 in the housing 40, the operator can connect the traction device 20 to the traction member 16 of the spacer 10 and use the traction device 20 to pull the cell 30 into the housing 40, which reduces the risk of damaging the cell 30 due to excessive thrust compared to a technical solution in which the push rod 50 pushes the negative electrode cover 36 to push the cell 30 into the housing 40. In addition, because the traction member 16 is formed within the pressure relief groove 121, it can also strengthen the structural strength of the pressure relief groove 121 and improve the resistance of the pressure relief groove 121 to deformation.

[0030] 4, 5, and 6 show a specific installation process for the cells 30, in which the operator uses only the traction device 20 to pull the traction member 16 of the spacer 10 and install the cells 30 into the housing 40. In another embodiment, referring to FIGS. 7, 8, and 9, the operator uses the traction device 20 to pull the traction member 16 of the spacer 10 and, at the same time, uses the push rod 50 to push the negative cover 36 of the battery unit to install the cells 30 into the housing 40. It should be understood that the above are only two installation methods according to this embodiment, and in fact, the present invention is not limited to the above installation methods.

[0031] See Figures 11, 12, 13, 14, and 15. In one embodiment, the traction member 16 includes a traction rib 161 and a first reinforcing member 162 connected to each other. The first reinforcing 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 reinforcing member 162. When the traction device 20 pulls the traction rib 161, the first reinforcing member 162 can support the traction rib 161 with a constant force, preventing the traction rib 161 from being torn. The traction rib 161 has a simple structure, is easy to process, and is easily applicable in industry. In this embodiment, the first reinforcing member 162 is further connected to the first side wall 111 and the second side wall 112, which greatly improves the structural strength of the spacer body 11 and the pressure relief groove 121. In another embodiment (not shown), the first reinforcing member 162 may be fixedly connected to only one of the first side wall 111 and the second side wall 112, and the first reinforcing member 162 may be fixedly connected to the base 12. In another embodiment (not shown), the traction member 16 may include only the traction rib 161, and the traction rib 161 may be fixedly connected to the first side wall 111 and / or the second side wall 112, and may be fixedly connected to the base 12. In another embodiment (not shown), the spacer body 11 may further include an upper wall and a lower wall, and a frame is formed by the upper wall, the lower wall, the first side wall 111, and the second side wall 112, and the traction rib 161 may be fixedly connected to the upper wall and / or the lower wall.

[0032] The first reinforcing member 162 may have various structures and shapes, and may be block-shaped, plate-shaped, spherical, linear, etc. The shape of the traction rib 161 may be, but is not limited to, a strip-shaped rib, a square rib, a spherical rib, etc.

[0033] In the embodiment shown in Figure 11, the first reinforcing member 162 has a flat structure, and the first reinforcing member 162 extends along the Z direction and the Y direction shown in Figure 11, respectively, and is perpendicular to both the first side wall 111 and the second side wall 112.

[0034] In one embodiment, the traction ribs 161 are fixedly connected to the first reinforcing member 162. That is, the traction ribs 161 may extend upward (e.g., in the X direction) from the first reinforcing member 162 to facilitate connection with the traction device 20.

[0035] In some embodiments, the traction rib 161 is protruded from the first reinforcing member 162. In this way, the traction rib 161 can ensure connection with the traction device 20, and occupies as little space as possible within the pressure relief groove 121, which is convenient for the layout design of the entire spacer 10.

[0036] In one embodiment, the traction rib 161 includes a first traction portion 1611 and a second traction portion 1612 that are coaxially arranged, and the first traction portion 1611 and the second traction portion 1612 are respectively protruded from both sides of the first reinforcing member 162 along the X-axis. As shown in Fig. 13, the first traction portion 1611 is protruded from the upper side of the first reinforcing member 162 (e.g., in the positive direction of the X-axis), and the second traction portion 1612 is protruded from the lower side of the first reinforcing member 162 (e.g., in the negative direction of the X-axis).

[0037] In this way, the traction device 20 can simultaneously engage with both the first traction portion 1611 and the second traction portion 1612 of the traction rib 161, thereby increasing the traction area between the traction rib 161 and the traction device 20 while ensuring the rigidity of the traction rib 161, and improving stability when the traction device 20 pulls the spacer 10.

[0038] In one embodiment, the first traction portion 1611 and the second traction portion 1612 are arranged symmetrically with respect to the plane on which the first reinforcing member 162 is located. This arrangement allows the forces received by the first traction portion 1611 and the second traction portion 1612 to be approximately equal, so that the force is applied relatively evenly during the process of tensioning the spacer 10, and movement deviation can be avoided.

[0039] In one embodiment, the first side wall 111 and the second side wall 112 are spaced apart along a first direction (the Y direction shown in FIG. 11 ), and the traction rib 161 extends along the first direction, which can increase the traction area between the traction rib 161 and the traction device 20 and improve stability when the traction device 20 pulls the spacer 10.

[0040] In some embodiments, the traction rib 161 is further fixedly connected to the first side wall 111 and the second side wall 112, further enhancing the structural strength of the spacer body 11 and the pressure relief groove 121. In other embodiments, the traction rib 161 may be fixedly connected to one of the first side wall 111 and the second side wall 112.

[0041] In one specific embodiment, as shown in FIG. 14 , to improve the strength of the traction rib 161, ensure a large traction area between the traction rib 161 and the traction device 20, and facilitate traction, the thickness L1 (the dimension in the X direction of the first reinforcing member 162) may be 1 mm to 10 mm, i.e., L1 is 1 mm or more and 10 mm or less, providing better support for the traction rib 161. The thickness L4 (the dimension in the Z direction of the traction rib 161) of the traction rib 161 may be equal to the thickness of the first reinforcing member 162, i.e., L4 is 1 mm or more and 10 mm or less, in order to improve the strength of the traction rib 161 itself. Of course, the above limitations on the thickness of the traction rib 161 and the first reinforcing member 162 are merely examples of the present invention and do not limit the present invention. For example, the thicknesses of the first reinforcing member 162 and the traction rib 161 may be, but are not limited to, 0.9 mm, 10 mm, 11 mm, 12 mm, 15 mm, etc.

[0042] In some embodiments, the spacer body 11 has a first opening 15 facing outward (i.e., away from the cell 30, e.g., in the positive Z direction), and the plane on which the opening 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 from the surface of the traction rib 161 away from the first surface to the first surface is greater than the thickness of the traction rib 161. That is, the distance from the traction rib 161 to the first surface on which the first opening 15 is located must satisfy the above condition, which prevents the traction rib 161 from protruding from the first surface due to deformation or the like during traction, thereby improving stability during the traction process.

[0043] 12 , the base 12 is provided with at least one pressure relief hole 122 to allow the pressure relief groove 121 to communicate with the cell 30. The number of pressure relief holes 122 may be one or more, and the shape of the pressure relief hole 122 may be oval, circular, elliptical, and / or rectangular, etc. If a malfunction occurs inside the cell 30 and a large amount of gas is generated, the pressure relief groove 121 can timely release the gas inside the cell 30 through the pressure relief hole 122, effectively avoiding expansion of the cell 30, preventing explosion of the battery unit, and effectively reducing safety risks of the battery unit. Therefore, as can be seen, the pressure relief groove 121 is subjected to large gas pressure when releasing gas. Therefore, providing the traction rib 161 and the first reinforcing member 162 in the pressure relief groove 121 can strengthen the strength of the pressure relief groove 121 and make it less susceptible to damage caused by gas pressure.

[0044] In the embodiment shown in FIGS. 11 and 12 , the pressure relief holes 122 are arranged in multiple rows, spaced apart along the second direction (X direction). Each row of the pressure relief holes 122 includes multiple pressure relief holes 122. The pressure relief holes 122 are oval, but not limited to, in shape. Oval holes typically have a small outlet diameter and a large internal space, allowing gas to be discharged relatively uniformly through the holes. Compared with holes of other shapes, oval holes can better control the gas flow, reducing the pressure difference that occurs when gas is discharged and improving the pressure relief effect. The base 12 further includes an adhesive injection hole 124, and the size of the pressure relief holes 122 in the area corresponding to the adhesive injection hole 124 is set smaller than the size of the pressure relief holes 122 in other areas.

[0045] In one embodiment, the base 12 further includes a hollow region 123, which corresponds to the region where the traction rib 161 is located. The hollow region 123 makes it easier for the traction device 20 to traction the traction rib 161, and the hollow region 123 communicates with the cells 30 and the pressure relief groove 121, respectively, and therefore functions almost the same as the pressure relief holes 122, thereby further improving the pressure relief ability of the pressure relief groove 121. In some embodiments, a gap 118 is further provided between the traction rib 161 and the base 12, which makes it easier to connect the traction device 20 and the traction rib 161.

[0046] 11 , the spacer 10 further includes at least one second reinforcing member 13, the second reinforcing member 13 being connected to the first side wall 111 and the second side wall 112. The first reinforcing member 162 and the second reinforcing member 13 are arranged parallel to each other with a gap therebetween, and the gap between the first reinforcing member 162 and the second reinforcing member 13 is set to be greater than a predetermined gap. As can be seen, the greater the number of reinforcing members, the greater the structural strength of the spacer body 11 can be. Therefore, under the premise of improving the structural strength of the spacer body 11, by setting the gap between the first reinforcing member 162 and the second reinforcing member 13 to be greater than a predetermined gap, interference between the second reinforcing member 13 and the traction device 20 can be avoided.

[0047] In addition, since the predetermined interval needs to be specifically set according to the model number and size of the traction device 20, the embodiment of the present invention does not limit the specific value of the predetermined interval, and those skilled in the art can specifically set it according to the actual situation.

[0048] In some embodiments, a plurality of second reinforcing members 13 may be provided, and the plurality of second reinforcing members 13 may be provided at intervals along the second direction (e.g., the X direction), and one second reinforcing member 13 may be provided between two adjacent rows of pressure relief holes 122.

[0049] In the embodiment shown in Figures 11 and 12, the second reinforcing member 13 may have a flat structure, two second reinforcing members 13 are provided, and the first reinforcing member 162 is located between the two second reinforcing members 13.

[0050] In one embodiment, the spacer body 11 further includes a bottom wall 113, which is connected to the first side wall 111 and the second side wall 112, respectively, to form an accommodating groove 115. The bottom wall 113 has a gap 114 that communicates with the accommodating groove 115, allowing the tab of the cell 30 to pass through the gap 114 and be partially accommodated in the accommodating groove 115. In some embodiments, the bottom wall 113 is not a completely closed surface, but has a gap 114. By accommodating a portion of the structure of the tab in the accommodating groove 115, the tab and the housing 40 are separated and kept in an insulated state, which effectively prevents short-circuit failure of the battery due to contact between the tab and the housing 40 and improves the safety of the battery unit.

[0051] In one embodiment, the shape of the receiving groove 115 may be the same as the shape of the spacer body 11, i.e., the receiving groove 115 may be rectangular. In one embodiment, the spacer body 11 further includes a mounting groove 116 for mounting the spacer 10 to the cell 30, and the bottom wall 113 of the mounting groove 116 is provided with a mounting hole 117 through which a screw or bolt can pass.

[0052] An embodiment of the present invention further provides a battery unit including the spacer 10 of any of the above embodiments. The battery unit further includes a cell 30, a cover, and an aluminum housing 40. The cell 30 and the spacer 10 are positioned within the housing 40, with a tab extending from one end of the cell 30, a portion of the tab structure being housed within the spacer 10, and the tab passing through the spacer 10 and connected to the cover.

[0053] Depending on the design of the battery unit, the tabs may be pulled out from one end of the cell 30 or from both ends of the cell 30, so a spacer 10 may be provided at one end of the cell 30 or at both ends of the battery.

[0054] 15 , in one embodiment, the battery unit 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 electrode tab 31 drawn out at one end where the positive electrode cover 35 is attached, and a negative electrode tab 32 drawn out at one end where the negative electrode cover 36 is attached. A spacer 10 is provided between the cell 30 and the positive electrode cover 35, and the positive electrode tab 31 passes through a gap 114 in the spacer 10 and is accommodated in an accommodating groove 115 of the spacer 10. 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.

[0055] An insulating film 37 is attached to the outer surface of the cell 30, and the material of the insulating film 37 may be Mylar (polyester film), but is not limited to this. By providing the above-mentioned spacer 10, deformation of the insulating film 37 and frictional resistance with the inner wall of the housing 40 can be reduced, and the risk of damage to the insulating film 37 can be avoided.

[0056] An embodiment of the present invention further provides a vehicle including the spacer 10 according to any of the above embodiments and a battery unit.

[0057] The above are merely some embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included within the protection scope of the present invention. [Explanation of symbols]

[0058] 10, spacer; 11, spacer body; 111, first side wall; 112, second side wall; 113, bottom wall; 114, gap; 115, receiving groove; 116, mounting groove; 117, mounting hole; 118, spacing; 12, base; 121, pressure relief groove; 122, pressure relief hole; 123, hollow area; 124, adhesive injection hole; 13, second reinforcing member; 15, first opening; 16, traction member; 161, traction rib; 1611, first traction portion; 1612, second traction portion; 162, first reinforcing member; 20, traction device; 30, cell; 31, positive electrode tab; 32, negative electrode tab; 33, positive electrode top patch; 34, negative electrode top patch; 35, positive electrode cover; 36, negative electrode cover; 37, insulating film; 40, housing; 50, push rod.

Claims

1. A spacer (10) comprising 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), and the base (12) is connected to the first side wall (111) and the second side wall (112), respectively, to form 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), and the traction member (16) is capable of moving the spacer (10) by applying a traction force thereto. A spacer characterized by:

2. The traction member (16) includes a traction rib (161), the traction rib (161) being fixedly connected to at least one of the first side wall (111), the second side wall (112), and the base (12).

2. The spacer according to claim 1.

3. the traction member (16) includes a traction rib (161) and a first reinforcing member (162) connected together, the first reinforcing member (162) being fixedly connected to at least one of the first side wall (111), the second side wall (112), and the base (12); 2. The spacer according to claim 1.

4. The traction rib (161) is fixedly connected to the first reinforcing member (162).

4. The spacer according to claim 3.

5. The traction rib (161) is provided in a protruding manner on the first reinforcing member (162).

5. The spacer according to claim 4.

6. The traction rib (161) includes a first traction portion (1611) and a second traction portion (1612) that are coaxially arranged, The first traction portion (1611) and the second traction portion (1612) are respectively provided on both sides of the first reinforcing member (162) in a protruding manner.

4. The spacer according to claim 3.

7. The spacer body (11) has a first opening (15), and a plane on which an open end of the first opening (15) is located is defined as a first surface, and a distance from a surface of the traction rib (161) away from the first surface to the first surface is greater than a thickness of the traction rib (161).

7. The spacer according to claim 2, wherein the spacer is a spacer having a thickness of 100 nm or less.

8. The first side wall (111) and the second side wall (112) are spaced apart along a first direction, The traction rib (161) extends along the first direction. The spacer according to any one of claims 2 to 7.

9. The spacer body (11) further includes at least one second reinforcing member (13) formed within the pressure relief groove (121); The second reinforcing member (13) is fixedly connected to the first side wall (111) and the second side wall (112), and the second reinforcing member (13) and the first reinforcing member (162) are spaced apart. The spacer according to any one of claims 2 to 8.

10. The base (12) is provided with at least one pressure relief hole (122); The shape of the pressure relief hole (122) includes oval, circular, elliptical, and / or rectangular. The spacer according to any one of claims 2 to 9.

11. The base (12) is further provided with an adhesive injection hole (124).

11. The spacer according to claim 10.

12. The base (12) is further provided with a hollow area (123), the hollow area (123) corresponding to the area where the traction rib (161) is located. A spacer according to any one of claims 2 to 11.

13. The spacer body (11) further includes a bottom wall (113); The bottom wall (113) is connected to the first side wall (111) and the second side wall (112) respectively to form a receiving groove (115); The bottom wall (113) is provided with a gap (114), which communicates with the receiving groove (115) so that the tab of the cell (30) passes through the gap (114) and is partially received in the receiving groove (115). A spacer according to any one of claims 2 to 12.

14. The spacer body (11) further includes a mounting groove (116) for mounting the spacer (10) to a cell (30); The bottom wall (113) of the mounting groove (116) is provided with a mounting hole (117) through which a screw or bolt can pass. A spacer according to any one of claims 2 to 13.

15. A battery unit including the spacer (10) according to any one of claims 1 to 14 and a cell (30) having a tab drawn out from one end thereof, At least a portion of the structure of the tab is housed within the spacer (10). A battery unit characterized by:

16. The tab a positive electrode tab (31) pulled out from one end of the positive electrode cover (35) of the cell (30); a negative electrode tab (32) extending from one end of the negative electrode cover (36) of the cell (30); The spacer (10) is provided between the cell (30) and the positive electrode cover (35), and the positive electrode tab (31) is accommodated in an accommodating groove (115) in the body of the spacer (10).

16. The battery unit according to claim 15.

17. A spacer (10) according to any one of claims 1 to 14, A vehicle characterized by:

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