Busbar fixing structure and battery pack

Abstract

A busbar fixing structure and a battery pack, the busbar fixing structure comprising a busbar (1) and a plastic fixing member, wherein the thickness of the busbar (1) extends in a Z direction; the plastic fixing member comprises a fixing base (2), a first connector (3) and a second connector (4); the first connector (3) and the second connector (4) are respectively arranged on two sides of the fixing base (2) in the Z direction in a protruding manner; a fixing hole (11) runs through the busbar (1) in the Z direction; the first connector (3) can pass through the fixing hole (11) and is snap-fitted and fixed to the busbar (1); and the second connector (4) can pass through a connecting hole in a battery case or a support and is snap-fitted and fixed to the battery case or the support.

Description

Busbar fixing structure and battery pack

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on August 20, 2024, application number 202422024478.X. The entire contents of the above application are incorporated by reference into this application.

[0002] Technical Field

[0003] The present application relates to the field of battery technology, for example, to a busbar fixing structure and a battery pack including the busbar fixing structure.

[0004] Background Art

[0005] The busbars in the battery pack usually need to be fixed. The conventional fixing method is to use a connector (airplane head or fir tree head) with an industrial cable tie, or an integrated connector cable tie structure. The connector is fixed to the corresponding mounting hole of the box or bracket. The cable tie is fixed along the outer periphery of the busbar cross section and tightened through the cable tie inverted fit structure.

[0006] Technical issues

[0007] The following situations may occur when the busbar is fixed using conventional fixing methods:

[0008] The cable tie itself is a soft fixation method, and after the cable tie is fixed around the bus, there is a gap between the cable tie and the bus, which leads to poor stability of the bus, large shaking amplitude of the bus, and low overall rigidity.

[0009] Technical Solutions

[0010] In a first aspect, a busbar fixing structure is provided, including a busbar, the thickness of which extends along the Z direction, and a plastic fixing part, the plastic fixing part including a fixing seat, a first connecting head and a second connecting head, the first connecting head and the second connecting head being respectively protruded on both sides of the fixing seat along the Z direction, the busbar being provided with a fixing hole passing through the fixing hole and being clamped and fixed to the busbar, and the second connecting head being able to pass through the connecting hole on the battery box or the bracket and being clamped and fixed to the battery box or the bracket.

[0011] In a second aspect, a battery pack is provided, comprising a box body and a battery module installed in the box body, wherein the box body is provided with a connection hole and further comprises the bus fixing structure as described above, wherein the bus of the bus fixing structure is connected to the battery cell of the battery module, and the second connector of the plastic fixing part of the bus fixing structure is snap-engaged with the connection hole.

[0012] Beneficial effects

[0013] The present application designs the plastic fixing as a double connector structure, and at the same time opens a fixing hole on the bus. The two connectors of the plastic fixing can be respectively clamped and fixed with the fixing holes on the bus and the connecting holes on the box or bracket. Compared with the related art of using cable ties and a fir head structure to fix the bus, the bus fixing structure of the present application can improve the fixing stiffness of the bus and prevent the bus from shaking and affecting its installation stability.

[0014] In this application, an insulating annular rubber sleeve is sleeved on the outer periphery of the first connector of the plastic fixing component. The first connector can pass through the fixing hole and make the bus bar abut against the insulating annular rubber sleeve and the first connector respectively. The insulating annular rubber sleeve can provide a certain pre-tightening force for the bus bar, so that the bus bar, the insulating annular rubber sleeve and the plastic fixing component are tightly connected as a whole through the pre-tightening force, thereby greatly improving the fixing stiffness of the bus bar.

[0015] Compared with the cable tie fixation in the related art, the plastic fixing part of the present application only needs to be pressed and installed by aligning the fixing holes on the bus and the connection holes on the box or bracket, without trimming the cable tie, making the fixation of the bus more convenient.

[0016] BRIEF DESCRIPTION OF THE DRAWINGS

[0017] FIG1 is a schematic structural diagram of a busbar fixing structure according to an embodiment of the present application.

[0018] FIG2 is an exploded schematic diagram of the busbar fixing structure according to an embodiment of the present application.

[0019] FIG3 is a schematic top view of the plastic fixing member according to an embodiment of the present application.

[0020] FIG. 4 is a schematic cross-sectional view of the plastic fixing member shown in FIG. 3 along the AA direction.

[0021] In Figure 1-4:

[0022] 1. Busbar; 11. Fixing hole;

[0023] 2. Fixing seat; 21. First abutting portion; 211. First planar portion; 212. First inclined portion; 22. Second abutting portion; 221. Second planar portion; 222. Second inclined portion; 23. Intermediate connecting member; 231. First connecting block; 232. Second connecting block;

[0024] 3. First connector; 31. First connecting body; 32. First clamping portion; 33. First notch;

[0025] 4. Second connector; 41. Second connecting body; 42. Second clamping portion; 43. Second notch;

[0026] 5. Insulating annular rubber sleeve.

[0027] Modes for Carrying Out the Invention

[0028] The technical solutions of the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0029] In the description of this application, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and can refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0030] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first feature being in direct contact with the second feature, or may include the first feature being in contact with the second feature through another feature between them instead of being in direct contact. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0031] In the description of this embodiment, if the terms "upper," "lower," "left," "right," and other directions or positional relationships appear, they are based on the directions or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, if the terms "first," "second," and the like appear, they are used solely for descriptive purposes and do not have any special meaning.

[0032] As shown in Figures 1 to 3, this embodiment provides a busbar fixing structure, including a busbar 1 and a plastic fixing member. The thickness of the busbar 1 extends along the Z direction. The plastic fixing member includes a fixing base 2, a first connector 3, and a second connector 4. The first connector 3 and the second connector 4 are respectively protruded from both sides of the fixing base 2 along the Z direction. The busbar 1 is provided with a fixing hole 11 along the Z direction. The first connector 3 can pass through the fixing hole 11 and be fixedly engaged with the busbar 1. The second connector 4 can pass through the connection hole on the battery box or bracket and be fixedly engaged with the battery box or bracket.

[0033] This embodiment utilizes a dual-connector structure for the plastic fastener. Specifically, a first connector 3 and a second connector 4 are provided on either side of the fixing base 2 along the Z direction. A fixing hole 11 is provided in the busbar 1. The first connector 3 can pass through the fixing hole 11 and be clipped onto the busbar 1. The second connector 4 can pass through a pre-defined connection hole in the battery box or bracket and be clipped onto the battery box or bracket. Compared to the related art method of using cable ties and a fir-tree-shaped structure to secure the busbar 1, the busbar fixing structure of this embodiment improves the fixing rigidity of the busbar 1 and prevents shaking of the busbar 1 that affects its installation stability.

[0034] Among them, the first connector 3 and the second connector 4 can be a fir tree head structure or an airplane head structure. Next, taking the first connector 3 and the second connector 4 using the fir tree head structure as an example, the bus fixing structure of the present application is described in detail.

[0035] Optionally, the busbar 1 may be a copper busbar or an aluminum busbar.

[0036] Optionally, the busbar fixing structure of this embodiment further includes an insulating annular rubber sleeve 5, which is sleeved around the outer periphery of the first connector 3. The first connector 3 can pass through the fixing hole 11 so that the two sides of the busbar 1 along the Z direction abut against the insulating annular rubber sleeve 5 and the first connector 3 respectively, and the side of the insulating annular rubber sleeve 5 away from the busbar 1 abuts against the fixing seat 2. Since the fixing seat 2 is made of plastic, after the insulating annular rubber sleeve 5 is sleeved around the outer periphery of the first connector 3, the first connector 3 is passed through the fixing hole 11 on the busbar 1, so that the busbar 1 is pressed against one side of the insulating annular rubber sleeve 5 along the Z direction and is clamped with the first connector 3. At this time, the insulating annular rubber sleeve 5 can provide a certain pre-tightening force for the busbar 1, so that the busbar 1, the insulating annular rubber sleeve 5 and the plastic fixing are tightly connected as a whole through the pre-tightening force, which greatly improves the fixing rigidity of the busbar.

[0037] In this embodiment, the plastic fixing member is integrally injection-molded.

[0038] In this embodiment, the insulating annular rubber sleeve 5 is made of an elastic insulating flame-retardant material. Optionally, the insulating annular rubber sleeve 5 is made of silicone rubber.

[0039] Optionally, the fixing seat 2 includes a first abutting portion 21, a second abutting portion 22 and an intermediate connecting member 23, the intermediate connecting member 23 is connected to the first abutting portion 21 and the second abutting portion 22 on both sides along the Z direction, the first connecting head 3 is connected to the center position of the first abutting portion 21, the second connecting head 4 is connected to the center position of the second abutting portion 22, the insulating annular rubber sleeve 5 abuts against the side of the first abutting portion 21 close to the bus 1, and when the second connecting head 4 passes through the connecting hole on the battery box or bracket, the battery box or bracket abuts against the second abutting portion 22.

[0040] By spacing the first abutment portion 21 and the second abutment portion 22, the first abutment portion 21 can provide a certain pre-tightening force for the clamping fixation between the bus 1 and the first connector 3, and the second abutment portion 22 can provide a certain pre-tightening force for the clamping fixation between the second connector 4 and the box or bracket.

[0041] Optionally, the first abutting portion 21 has a first planar portion 211 located at a central position and a first inclined portion 212 connected to the outer periphery of the first planar portion 211, and the first inclined portion 212 extends in an inverted umbrella shape in a direction away from the intermediate connecting member 23 at one end away from the first planar portion 211. The second abutting portion 22 has a second planar portion 221 located at a central position and a second inclined portion 222 connected to the outer periphery of the second planar portion 221, and the second inclined portion 222 extends in an umbrella shape in a direction away from the intermediate connecting member 23 at one end away from the second planar portion 221. The first planar portion 211 corresponds to the second planar portion 221, the first planar portion 211 is connected to the first connecting head 3, the second planar portion 221 is connected to the second connecting head 4, the intermediate connecting member 23 is respectively connected to the first inclined portion 212 and the second inclined portion 222, the insulating annular rubber sleeve 5 abuts against the first inclined portion 212, and the battery box or bracket abuts against the second inclined portion 222.

[0042] In this embodiment, the first abutting portion 21 and the second abutting portion 22 are respectively designed to be umbrella-shaped structures, and the first connecting head 3 is connected to the center position of the first planar portion 211 of the first abutting portion 21, and the second connecting head 4 is connected to the center position of the second planar portion 221 of the second abutting portion 22. When the insulating annular rubber sleeve 5 abuts against the first inclined portion 212, the first inclined portion 212 has sufficient deformation space, so that the insulating annular rubber sleeve 5 can provide sufficient pre-tightening force to the bus 1; similarly, when the second connecting head 4 passes through the connecting hole on the box or the bracket, the second inclined portion 222 has sufficient deformation space to provide sufficient pre-tightening force to the box or the bracket.

[0043] Optionally, the intermediate connecting member 23 includes a first connecting block 231 and a second connecting block 232 arranged at intervals along the X direction perpendicular to the Z direction, the first connecting block 231 is parallel to the second connecting block 232, the first connecting block 231 and the second connecting block 232 are symmetrically arranged between the first abutting portion 21 and the second abutting portion 22, the first connecting block 231 and the second connecting block 232 are adjacent to the first planar portion 211 and the second planar portion 221 on both sides along the Z direction, and the first connecting block 231 and the second connecting block 232 are connected to the first inclined portion 212 and the second inclined portion 222 on both sides along the Z direction.

[0044] The first connecting block 231 and the second connecting block 232 are respectively adjacent to the first planar portion 211 and the second planar portion 221 and connected to the first inclined portion 212 and the second inclined portion 222, which can provide sufficient supporting force for the first abutting portion 21 and the second abutting portion 22 to prevent the first inclined portion 212 and the second inclined portion 222 from being excessively deformed and affecting the pre-tightening effect.

[0045] In other embodiments, the intermediate connector 23 may also be a ring-shaped structure, such as a circular ring-shaped structure. When a circular ring-shaped structure is adopted, the outer periphery of the intermediate connector 23 connects the first inclined portion 212 and the second inclined portion 222. In this embodiment, the inner diameter of the insulating annular rubber sleeve 5 is larger than the outer diameter of the first connector 3 and the diameter of the fixing hole 11, and the inner diameter of the insulating annular rubber sleeve 5 is smaller than the outer diameter of the first inclined portion 212. This ensures that there is sufficient contact area between the insulating annular rubber sleeve 5 and the busbar 1 and the first inclined portion 212, thereby improving the pre-tightening effect. The inner diameter of the insulating annular rubber sleeve 5 is larger than the outer diameter of the first connector 3, which allows the insulating annular rubber sleeve 5 to be smoothly sleeved on the outer periphery of the first connector 3.

[0046] Exemplarily, the insulating annular rubber sleeve 5 is a circular ring structure, the outer peripheries of the first planar portion 211 and the first inclined portion 212 are both circular, and the outer peripheries of the second planar portion 221 and the second inclined portion 222 are both circular.

[0047] Exemplarily, the first inclined portion 212 is close to one side of the bus 1 and is located adjacent to an edge position, which is a planar structure parallel to the bus 1. When the bus 1 is clamped and fixed to the first connector 3, the planar structure is in surface contact with the insulating annular rubber sleeve 5, thereby increasing the contact area between the first abutting portion 21 and the insulating annular rubber sleeve 5; the second inclined portion 222 is away from one side of the bus 1 and is located adjacent to an edge position, which is a planar structure parallel to the bus 1. When the second connector 4 is clamped and fixed to the box or bracket through the connecting hole, the planar structure is in surface contact with the box or bracket, thereby increasing the contact area between the second abutting portion 22 and the box or bracket.

[0048] Among them, the first connecting head 3 and the second connecting head 4 are both fir tree head structures. For example, the first connecting head 3 includes a first connecting body 31 and a plurality of first clamping parts 32 arranged around the outer periphery of the first connecting body 31, and the second connecting head 4 includes a second connecting body 41 and a plurality of second clamping parts 42 arranged around the outer periphery of the second connecting body 41. The first connecting body 31 is connected to the center position of the first planar part 211, and the second connecting body 41 is connected to the center position of the second planar part 221; the first connecting body 31 is clearance-matched with the fixing hole 11, and the first connecting head 3 can pass through the fixing hole 11 and make the two side surfaces of the bus 1 along the Z direction respectively abut against the insulating annular rubber sleeve 5 and one of the first clamping parts 32; the second connecting body 41 is clearance-matched with the connecting hole, and the second connecting head 4 can pass through the connecting hole and make the two side surfaces of the battery box or bracket along the Z direction respectively abut against the second inclined part 222 and one of the second clamping parts 42.

[0049] Since the first connector 3 and the second connector 4 adopt a fir head structure, when the first connector 3 passes through the fixing hole 11 on the bus 1, pressure can be applied to the first connector 3 in the direction of the bus 1, so that the two sides of the bus 1 along the Z direction are respectively in contact with the insulating annular rubber sleeve 5 and one of the first clamping parts 32, so as to improve the clamping stability between the first connector 3 and the bus 1; similarly, when the second connector 4 passes through the connecting hole on the box or the bracket, pressure can be applied to the second connector 4 in the direction away from the bus 1, so that the two sides of the box or the bracket along the Z direction are respectively in contact with the second inclined part 222 and one of the second clamping parts 42.

[0050] In this embodiment, the diameter of the first clamping portion 32 along the X direction is larger than the aperture of the fixing hole 11. When the first connector 3 passes through the fixing hole 11 on the busbar 1, the first clamping portion 32 will be squeezed by the fixing hole 11 and deformed. If the gap between the first connecting body 31 and the fixing hole 11 is too small, it will prevent the first connector 3 from passing through the fixing hole 11 smoothly. Similarly, the diameter of the second clamping portion 42 along the X direction is larger than the aperture of the connecting hole. When the second connector 4 passes through the connecting hole on the box or the bracket, the second clamping portion 42 will be squeezed by the connecting hole and deformed. If the gap between the second connecting body 41 and the connecting hole is too small, it will prevent the second connector 4 from passing through the connecting hole smoothly.

[0051] In order to allow the first connector 3 to smoothly pass through the fixing hole 11 and the second connector 4 to smoothly pass through the connecting hole, in this embodiment, notches are respectively provided on the outer peripheries of the first connector 3 and the second connector 4 .

[0052] Optionally, the first clamping portion 32 is provided with a plurality of first notches 33 extending from its edge to the first connecting body 31; by providing the first notches 33, when the first connector 3 is plugged into the fixing hole 11 on the bus 1, the first connector 3 will be squeezed and deformed, and the opening of the first notches 33 can provide the first connector 3 with sufficient deformation space, so that the first connector 3 can smoothly pass through the fixing hole 11; the second clamping portion 42 is provided with a plurality of second notches 43 extending from its edge to the second connecting body 41, and when the second connector 4 passes through the connecting hole on the box or the bracket, the second connector 4 can be squeezed and deformed, and the opening of the second notches 43 can provide the second connector 4 with sufficient deformation space, so that the second connector 4 can smoothly pass through the connecting hole.

[0053] Optionally, one of the first notches 33 extends from the edge of the first clamping portion 32 to the center of the first connecting body 31, and the length of the first notch 33 extends along the Z direction to close to the first planar portion 211; one of the second notches 43 extends from the edge of the second clamping portion 42 to the center of the second connecting body 41, and the length of the second notch 43 extends along the Z direction to close to the second planar portion 221.

[0054] When the first connector 3 passes through the fixing hole 11, the first clamping portion 32 is squeezed and deformed, and at the same time, squeezes the first connecting body 31. In this embodiment, by extending one of the first notches 33 from the edge of the first clamping portion 32 to the center of the first connecting body 31, space is provided for the first connecting body 31 to deform due to the squeezing, thereby reducing the resistance encountered by the first connector 3 when passing through the fixing hole 11. Similarly, when the second connector 4 passes through the connecting hole, the second clamping portion 42 is squeezed and deformed, and at the same time, squeezes the second connecting body 41. In this embodiment, by extending one of the second notches 43 from the edge of the second clamping portion 42 to the center of the second connecting body 41, space is provided for the second connecting body 41 to deform due to the squeezing, thereby reducing the resistance encountered by the second connector 4 when passing through the connecting hole.

[0055] Exemplarily, as shown in Figure 4, the first connecting body 31 is a cylindrical structure, and its end away from the fixing base 2 is similar to a conical structure. The number of first notches 33 is two, and the two first notches 33 are respectively located on both sides of the first connecting head 3 along the radial direction, and one of the first notches 33 extends from the edge of the first clamping portion 32 to the center of the first connecting body 31; similarly, the second connecting body 41 is a cylindrical structure, and its end away from the fixing base 2 is similar to a conical structure. The number of second notches 43 is two, and the two second notches 43 are respectively located on both sides of the second connecting head 4 along the radial direction, and one of the second notches 43 extends from the edge of the second clamping portion 42 to the center of the second connecting body 41.

[0056] In this embodiment, the length of the first connecting body 31 and the length of the second connecting body 41 along the Z direction can be determined according to actual conditions. For example, the arrangement density of the first clamping portions 32 along the Z direction can be determined according to the thickness of the busbar 1, and the arrangement density of the second clamping portions 42 along the Z direction can be determined according to the thickness of the plate body where the connection hole is provided in the box or bracket. The details will not be repeated here.

[0057] Compared with the cable tie fixation in the related art, the plastic fixing member of this embodiment only needs to be aligned with the fixing hole 11 on the bus 1 and the connection hole on the box or bracket and pressed to install, without trimming the cable tie, making the bus 1 more convenient to fix.

[0058] The plastic fixing member of this embodiment can be made into standard parts of different sizes for selection and use, that is, a standard part of corresponding size is designed for each of the fixing holes 11 and the connecting holes of different size ranges.

[0059] The plastic fixing member of this embodiment is not limited to being used for fixing the busbar 1 , but is also applicable to fixing other thin plate parts with similar structures.

[0060] This embodiment also provides a battery pack, including a box body, a battery module installed in the box body, and a bus fixing structure as described in the above embodiment. The box body is provided with a connection hole, the bus of the bus fixing structure is connected to the battery cell of the battery module, and the second connector 4 of the plastic fixing part of the bus fixing structure is snap-fitted into the connection hole.

[0061] In other embodiments, when the bus 1 is too long, multiple fixing holes 11 need to be opened on the bus 1, and a plastic fixing piece is clamped and fixed at each fixing hole 11. When the number of connection holes on the box is insufficient or the position of the connection hole opening is limited, it is also necessary to fix the bracket in the box, open a connection hole on the bracket, and clamp and fix the second connector 4 of the plastic fixing piece through the connection hole on the bracket.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the various embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A busbar fixing structure, comprising a busbar, the thickness of which extends along the Z direction, and also comprising a plastic fixing member, the plastic fixing member comprising a fixing seat, a first connecting head and a second connecting head, the first connecting head and the second connecting head are respectively protruded on both sides of the fixing seat along the Z direction, the busbar is penetrated by a fixing hole along the Z direction, the first connecting head can pass through the fixing hole and be fixed to the busbar by clamping, and the second connecting head can pass through the connecting hole on the battery box or the bracket and be fixed to the battery box or the bracket by clamping.

2. The bus fixing structure according to claim 1 further includes an insulating annular rubber sleeve, which is sleeved on the outer periphery of the first connector, and the first connector can pass through the fixing hole and make the two sides of the bus along the Z direction respectively abut against the insulating annular rubber sleeve and the first connector, and the side of the insulating annular rubber sleeve away from the bus abuts against the fixing seat.

3. The busbar fixing structure according to claim 2, wherein: The fixing seat includes a first abutting portion, a second abutting portion and an intermediate connecting member, the intermediate connecting member is respectively connected to the first abutting portion and the second abutting portion on both sides along the Z direction, the first connecting head is connected to the center position of the first abutting portion, the second connecting head is connected to the center position of the second abutting portion, the insulating annular rubber sleeve abuts against a side of the first abutting portion close to the bus, and when the second connecting head passes through the connecting hole on the battery box or the bracket, the battery box or the bracket abuts against the second abutting portion.

4. The busbar fixing structure according to claim 3, wherein: The first abutting portion comprises a first plane portion located at a central position and a first inclined portion connected to the periphery of the first plane portion, an end of the first inclined portion away from the first plane portion extends in an inverted umbrella shape toward a direction away from the intermediate connecting member, the second abutting portion comprises a second plane portion located at a central position and a second inclined portion connected to the periphery of the second plane portion, an end of the second inclined portion away from the second plane portion extends in an umbrella shape toward a direction away from the intermediate connecting member, the first plane portion corresponds to the second plane portion, the first plane portion is connected to the first connecting head, the second plane portion is connected to the second connecting head, the intermediate connecting member is respectively connected to the first inclined portion and the second inclined portion, the insulating annular rubber sleeve abuts against the first inclined portion, and the battery box or the bracket abuts against the second inclined portion.

5. The busbar fixing structure according to claim 4, wherein: The intermediate connecting member includes a first connecting block and a second connecting block arranged at intervals along an X direction perpendicular to the Z direction, the first connecting block is parallel to the second connecting block, the first connecting block and the second connecting block are symmetrically arranged between the first abutting portion and the second abutting portion, the first connecting block and the second connecting block are adjacent to the first planar portion and the second planar portion on both sides along the Z direction, and the first connecting block and the second connecting block are connected to the first inclined portion and the second inclined portion on both sides along the Z direction.

6. The busbar fixing structure according to claim 4, wherein: The inner diameter of the insulating annular rubber sleeve is respectively larger than the outer diameter of the first connector and the diameter of the fixing hole, and the inner diameter of the insulating annular rubber sleeve is smaller than the outer diameter of the first inclined portion.

7. The busbar fixing structure according to any one of claims 4 to 6, wherein: The first connecting head and the second connecting head are both of fir tree head structure, the first connecting head includes a first connecting body and a plurality of first clamping parts arranged around the outer circumference of the first connecting body, the second connecting head includes a second connecting body and a plurality of second clamping parts arranged around the outer circumference of the second connecting body, the first connecting body is connected to the center position of the first plane part, and the second connecting body is connected to the center position of the second plane part; the first connecting body is gap-matched with the fixing hole, the first connecting head can pass through the fixing hole and make the two side surfaces of the busbar along the Z direction respectively abut against the insulating annular rubber sleeve and one of the first clamping parts; the second connecting body is gap-matched with the connecting hole, the second connecting head can pass through the connecting hole and make the two side surfaces of the battery box or the bracket along the Z direction respectively abut against the second inclined part and one of the second clamping parts.

8. The busbar fixing structure according to claim 7, wherein: The first clamping portion is provided with a plurality of first notches extending from its edge to the first connecting body, and the second clamping portion is provided with a plurality of second notches extending from its edge to the second connecting body.

9. The busbar fixing structure according to claim 8, wherein: One of the first notches extends from the edge of the first clamping portion to the center of the first connecting body, and the length of the first notch extends along the Z direction to close to the first planar portion; one of the second notches extends from the edge of the second clamping portion to the center of the second connecting body, and the length of the second notch extends along the Z direction to close to the second planar portion.

10. A battery pack, comprising a box body and a battery module installed in the box body, and also comprising a bus fixing structure as described in any one of claims 1 to 9, the box body is provided with a connecting hole, the bus of the bus fixing structure is connected to the battery cell of the battery module, and the second connector of the plastic fixing part of the bus fixing structure is snap-fitted into the connecting hole.

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