Support fixing assembly and battery module

Abstract

The utility model belongs to the technical field of batteries, and discloses a bracket fixing assembly and a battery module, the bracket fixing assembly comprises a bracket and a module upper cover; one of the support and the module upper cover is provided with a positioning protrusion, the other of the support and the module upper cover is provided with a positioning groove, and the positioning protrusion is inserted into the positioning groove. The support can be limited to move relative to the module upper cover in the direction parallel to the module upper cover (namely the length and width direction of the support); and buckles are arranged on at least two opposite sides of one of the bracket and the module upper cover, and the bracket is connected with the module upper cover through the buckles, so that the movement of the bracket relative to the module upper cover in the thickness direction can be limited, namely, the movement of the bracket is limited in the length-width direction and the thickness direction of the bracket, and the stability of the CCS assembly in the battery module is further ensured. The influence on the acquisition of voltage and temperature signals caused by excessive pulling of the wire harness on the bracket due to movement of the bracket is avoided, and the safe and reliable operation of the battery module is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a bracket fixing component and a battery module. Background Art

[0002] The CCS (Cell Connection System, integrated busbar) component in the power battery is the core part of the battery safety monitoring center and plays a vital role in the safety performance of the power battery. The CCS component includes a CCS bracket, a busbar, and a collection harness. The CCS bracket is connected to the upper cover of the battery module to fix the position of the CCS component and ensure the stability and safety of the CCS component when the battery module is impacted or vibrated, so as to accurately collect the voltage and temperature signals of the internal battery cells and ensure the safe operation of the battery module.

[0003] In the prior art, the CCS bracket and the upper cover of the module are usually fixed by riveting or by plugging posts and grooves. Fixing the CCS bracket and the upper cover by riveting is difficult to manufacture and fix, and the process is relatively complicated; fixing the CCS bracket and the upper cover by plugging posts and grooves is not stable enough. For example, when the vehicle is driving, the battery module vibrates all the time, and when the road conditions are bad, the battery module is subjected to a greater impact. The CCS bracket and the upper cover cannot be stably fixed by plugging posts and grooves alone, causing the CCS bracket to move, affecting the collection of voltage and temperature signals by the collection harness on the CCS bracket, and the operating safety and reliability of the battery module cannot be guaranteed.

[0004] Therefore, there is an urgent need for a bracket fixing assembly and a battery module to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a bracket fixing component and a battery module, which can improve the connection strength between the CCS bracket and the module upper cover, ensure the stability of the CCS component in the battery module, and ensure the safe operation of the battery module.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] On the one hand, a bracket fixing assembly is provided, comprising a bracket and a module upper cover;

[0008] A positioning protrusion is provided on one of the bracket and the module upper cover, and a positioning groove is provided on the other of the bracket and the module upper cover, and the positioning protrusion is inserted into the positioning groove;

[0009] One of the bracket and the module upper cover is provided with buckles on at least two opposite sides, and the bracket is connected to the module upper cover through the buckles.

[0010] As a preferred solution of the bracket fixing assembly provided by the utility model, the buckle includes a first clamping plate and a second clamping plate connected at an angle, and the first clamping plate and the second clamping plate both extend along the side of the module upper cover;

[0011] One end of the first clamping plate away from the second clamping plate is bent and connected to one of the bracket and the module upper cover, and the second clamping plate is hooked on the other of the bracket and the module upper cover.

[0012] As a preferred solution of the bracket fixing assembly provided by the utility model, a plurality of buckles are arranged at intervals on one side of the bracket or the module upper cover, and the buckle includes a connected cantilever and a hook;

[0013] One end of the cantilever away from the hook is connected to one of the bracket and the module upper cover, and the hook is hooked on the other of the bracket and the module upper cover.

[0014] As a preferred solution of the bracket fixing assembly provided by the utility model, the positioning protrusion is integrally arranged on the bracket, and the positioning protrusion is arranged with a recessed groove on the side facing away from the module upper cover; the module upper cover is integrally provided with a convex structure on the side facing away from the bracket, and the convex structure is arranged with the positioning groove on the side facing the bracket.

[0015] As a preferred solution of the bracket fixing assembly provided by the utility model, a limiting clamping protrusion is provided on one of the outer wall of the positioning protrusion and the inner wall of the positioning groove, and a limiting clamping groove is provided on the other of the outer wall of the positioning protrusion and the inner wall of the positioning groove, and the limiting clamping protrusion is clamped in the limiting clamping groove.

[0016] As a preferred solution of the bracket fixing assembly provided by the utility model, the limit slot is provided on the inner wall of the positioning groove, and the outer wall of the convex structure is provided with a first thickened portion, and the first thickened portion is arranged opposite to the limit slot;

[0017] Alternatively, the limiting slot is provided on the outer wall of the positioning protrusion, and the inner wall of the recessed groove is provided with a second thickened portion, and the second thickened portion is arranged opposite to the limiting slot.

[0018] As a preferred solution of the bracket fixing assembly provided by the utility model, a plurality of the positioning protrusions and the positioning grooves are provided, and the plurality of positioning protrusions and the plurality of positioning grooves are plugged in one-to-one correspondence; the plurality of positioning protrusions are asymmetrically distributed with respect to at least one center line of the bracket.

[0019] As a preferred solution of the bracket fixing assembly provided by the utility model, the cross-sectional area of ​​the positioning protrusion and / or the cross-sectional area of ​​the positioning groove gradually decreases along the plugging direction, and the plugging direction is the direction in which the positioning protrusion is inserted into the positioning groove.

[0020] As a preferred solution of the bracket fixing assembly provided by the utility model, the top and bottom ends of the positioning protrusion are both provided with a first rounded corner;

[0021] And / or, the notch opening and the groove bottom of the positioning groove are both provided with second chamfered corners.

[0022] On the other hand, a battery module is provided, comprising a battery cell and the bracket fixing assembly as described above, wherein a busbar assembly is arranged on a side of the bracket facing the module upper cover, a plurality of battery cells are arranged, and the busbar assembly is electrically connected to the plurality of battery cells.

[0023] Beneficial effects of the utility model:

[0024] The utility model provides a bracket fixing component and a battery module including the bracket fixing component. On the one hand, the bracket and the module upper cover are plug-connected by a positioning protrusion and a positioning groove, which can limit the bracket from moving relative to the module upper cover in a direction parallel to the module upper cover (i.e., the length and width direction of the bracket). On the other hand, the bracket and the module upper cover are fixed by snaps on at least two opposite sides, which improves the connection strength between the bracket and the module upper cover and can limit the bracket from moving relative to the module upper cover in the thickness direction thereof, i.e., the movement of the bracket is limited in both the length and width direction and the thickness direction of the bracket, thereby ensuring the stability of the CCS component in the battery module, avoiding the movement of the bracket to excessively pull the wiring harness on the bracket and thus affecting the collection of voltage and temperature signals, and ensuring the safe and reliable operation of the battery module. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is an axonometric view of a bracket fixing assembly provided in a specific embodiment of the utility model;

[0026] Figure 2 It is a first exploded view of the bracket fixing assembly provided in a specific embodiment of the utility model;

[0027] Figure 3 It is a second exploded view of the bracket fixing assembly provided in the specific embodiment of the utility model;

[0028] Figure 4 It is a side view of a bracket fixing assembly provided in a specific embodiment of the utility model;

[0029] Figure 5 yes Figure 4 A partial enlarged view of the middle A;

[0030] Figure 6 It is a schematic diagram of the structure of the buckle and the bracket provided in the specific embodiment of the utility model;

[0031] Figure 7 It is a schematic diagram of the plug-in connection between the bracket and the module upper cover provided in a specific embodiment of the utility model;

[0032] Figure 8 yes Figure 7 A partial view of

[0033] Fig. 9 It is a top view of the bracket fixing assembly provided in a specific embodiment of the utility model.

[0034] In the figure:

[0035] 1. Bracket; 2. Module cover; 3. Buckle; 4. Busbar; 5. Double-sided tape; 6. Connecting plate;

[0036] 11. Positioning protrusion; 12. Concave groove; 13. Pressure relief hole;

[0037] 111, limit clamping protrusion; 112, first chamfered corner; 121, third chamfered corner;

[0038] 21. Positioning groove; 22. Convex hull structure;

[0039] 211, limit slot; 212, second rounded corner;

[0040] 221, first thickened portion; 222, fourth rounded corner;

[0041] 31. First clamping plate; 32. Second clamping plate; 33. Cantilever; 34. Hook. DETAILED DESCRIPTION

[0042] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0043] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0045] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0046] like Figure 1 , Figure 2 as well as Figure 3 As shown, this embodiment provides a bracket fixing assembly, including a bracket 1 and a module upper cover 2. The bracket 1 can be a bracket 1 of a CCS assembly, and the module upper cover 2 is an upper cover plate of a battery module. The bracket fixing assembly can improve the connection strength between the bracket 1 and the module upper cover 2, ensure the stability of the CCS assembly in the battery module, and ensure the safe operation of the battery module.

[0047] Specifically, see Figures 1 to 3 A positioning protrusion 11 is provided on the bracket 1, and a positioning groove 21 is provided on the module cover 2, and the positioning protrusion 11 is inserted into the positioning groove 21; the module cover 2 and the bracket 1 have a length direction and a width direction that are perpendicular to each other, and the module cover 2 is provided with buckles 3 on both sides opposite to each other along the width direction, and the buckles 3 on both sides are engaged with the corresponding two sides of the bracket 1.

[0048] In the bracket fixing assembly provided in the present embodiment, on the one hand, the bracket 1 and the module upper cover 2 are plug-connected by the positioning protrusion 11 and the positioning groove 21, which can limit the bracket 1 from moving relative to the module upper cover 2 in a direction parallel to the module upper cover 2 (i.e., the length and width direction of the bracket 1); on the other hand, the bracket 1 and the module upper cover 2 are fixed by snap fasteners 3 on at least two opposite sides, which improves the connection strength between the bracket 1 and the module upper cover 2 and can limit the movement of the bracket 1 relative to the module upper cover 2 in its thickness direction, i.e., the movement of the bracket 1 is restricted in both the length and width direction and the thickness direction of the bracket 1, thereby ensuring the stability of the CCS assembly in the battery module, avoiding the movement of the bracket 1 from excessively pulling the wiring harness on the bracket 1 and affecting the collection of voltage and temperature signals, and ensuring the safe and reliable operation of the battery module.

[0049] The side of the bracket 1 facing away from the module upper cover 2 is used to arrange the battery cells. In this embodiment, since the positioning protrusion 11 is protruded on the bracket 1 towards the module upper cover 2, it will not interfere with the battery cells below the bracket 1.

[0050] It is understandable that buckles 3 may also be arranged on the other two sides of the module upper cover 2 to engage with the corresponding sides of the bracket 1 .

[0051] Of course, in other embodiments, the module cover 2 may be provided with a positioning protrusion 11, and the bracket 1 may be provided with a positioning groove 21, so as to achieve the plugging of the bracket 1 and the module cover 2. Similarly, buckles 3 may be provided on at least two opposite sides of the bracket 1, and the buckles 3 on the two sides are engaged with the corresponding two sides of the module cover 2.

[0052] Optionally, the positioning protrusion 11 and the positioning groove 21 are interference fit, and the interference amount is 0.3mm~1mm, for example, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, etc.; the interference fit between the positioning protrusion 11 and the positioning groove 21 makes the two tightly inserted, effectively limiting the relative movement of the bracket 1.

[0053] In some embodiments, see Figure 4 and Figure 5 The buckle 3 includes a first clamping plate 31 and a second clamping plate 32 connected at an angle, and the first clamping plate 31 and the second clamping plate 32 both extend along the side of the module cover 2. One end of the first clamping plate 31 away from the second clamping plate 32 is bent and connected to one of the bracket 1 and the module cover 2, and the second clamping plate 32 is hooked and clamped to the other of the bracket 1 and the module cover 2.

[0054] For example, see Figure 3 , Figure 4 as well as Figure 5The first clamp 31 is bent at one end away from the second clamp 32 and connected to the module cover 2. The second clamp 32 is hooked on the side of the bracket 1 facing away from the module cover 2. The first clamp 31 can contact the side of the battery module box to ensure the sealing of the battery module. The first clamp 31 is connected to the long side of the module cover 2, and the first clamp 31 and the second clamp 32 extend from one end of the module cover 2 to the other end, ensuring that they can be hooked with the bracket 1 in the entire length direction, improving the clamping strength between the module cover 2 and the bracket 1 to prevent loosening.

[0055] Alternatively, the end of the first clamping plate 31 away from the second clamping plate 32 is bent and connected to the bracket 1, and the second clamping plate 32 is hooked and clamped on the side of the module cover 2 facing away from the bracket 1, which can also achieve the clamping connection between the module cover 2 and the bracket 1. Optionally, the first clamping plate 31 is connected to the length side of the bracket 1, and the first clamping plate 31 and the second clamping plate 32 are extended from one end of the bracket 1 to the other end, ensuring that the bracket 1 and the module cover 2 have a high connection strength in the entire length direction to prevent the two from being disengaged.

[0056] In this embodiment, the first clamping plate 31 , the second clamping plate 32 and the module upper cover 2 are integrally formed, for example, by vacuum forming. The first clamping plate 31 after forming can be elastically deformed relative to the module upper cover 2 to achieve hooking the bracket 1 .

[0057] In a new embodiment, a plurality of buckles 3 are arranged at intervals on one side of the bracket 1 or the module upper cover 2, see Figure 6 The buckle 3 includes a connected cantilever 33 and a hook 34. The multiple buckles 3 arranged at intervals can ensure the connection strength between the bracket 1 and the module cover 2, and can also reduce the amount of materials and reduce costs. The end of the cantilever 33 away from the hook 34 is connected to one of the bracket 1 and the module cover 2, and the hook 34 is hooked on the other of the bracket 1 and the module cover 2.

[0058] For example, the cantilever 33 is connected to the module cover 2, and the side surface of the cantilever 33 and the end surface of the module cover 2 are on the same plane, and the hook 34 is hooked on the side of the bracket 1 facing away from the module cover 2; during the hooking process between the hook 34 and the bracket 1, the cantilever 33 is elastically deformed and returns to its original state after the hooking is completed. Alternatively, the cantilever 33 can also be connected to the bracket 1, and the hook 34 is hooked on the module cover 2.

[0059] Exemplarily, the cantilever 33 , the hook 34 and the module upper cover 2 are integrally formed, for example, by vacuum forming. The cantilever 33 after forming can be elastically deformed relative to the module upper cover 2 so as to achieve the hook bracket 1 .

[0060] Optionally, the positioning protrusion 11 is integrally provided on the bracket 1, and a concave groove 12 is formed on the side of the positioning protrusion 11 facing away from the module upper cover 2; a convex bulge structure 22 is integrally provided on the side of the module upper cover 2 facing away from the bracket 1, and a positioning groove 21 is formed on the side of the convex bulge structure 22 facing the bracket 1. That is, the positioning protrusion 11 is concavely formed at a corresponding position on the bracket 1, and a concave groove 12 is formed on the back of the positioning protrusion 11; the convex bulge structure 22 is concavely formed at a corresponding position on the module upper cover 2, and a positioning groove 21 is formed on the back of the convex bulge structure 22. Exemplarily, the positioning protrusion 11 is formed on the bracket 1 by a vacuum forming process, and the positioning groove 21 is formed on the module upper cover 2 by a vacuum forming process, and the forming efficiency is high without the need to increase or reduce additional materials.

[0061] See also Figure 7 and Figure 8 The bracket 1 is inserted into the module upper cover 2 along the insertion direction a shown by the arrow in the figure until the positioning protrusion 11 and the positioning groove 21 are inserted into place. Optionally, the outer wall of the positioning protrusion 11 is provided with a limiting clamping protrusion 111, and the inner wall of the positioning groove 21 is concavely provided with a limiting clamping groove 211. The limiting clamping protrusion 111 is clamped in the limiting clamping groove 211, which can limit the movement of the bracket 1 relative to the module upper cover 2 along its own thickness direction, and further improve the stability of the positioning protrusion 11 and the positioning groove 21 after insertion.

[0062] See also Figure 8 Since the limiting slot 211 is provided on the inner wall of the positioning groove 21, the wall thickness of the convex structure 22 will be reduced. Therefore, a first thickened portion 221 is provided on the outer wall of the convex structure 22. The first thickened portion 221 is arranged opposite to the limiting slot 211 to compensate for the loss of strength of the convex structure 22 due to the opening of the limiting slot 211, so as to prevent the wall surface of the convex structure 22 from being crushed due to the tight fit.

[0063] Exemplarily, the limiting clamping protrusion 111 is disposed on the outer wall of the positioning protrusion 11, and the limiting clamping groove 211 is disposed on the inner wall of the positioning groove 21, so as to ensure that the positioning protrusion 11 and the positioning groove 21 are firmly plugged in the entire circumference. Further, the first thickened portion 221 is disposed on the outer wall of the convex hull structure 22 and directly faces the annular limiting clamping groove 211.

[0064] Alternatively, a limiting card slot 211 may be provided on the outer wall of the positioning protrusion 11, and a limiting card protrusion 111 may be provided on the inner wall of the positioning groove 21, which can also strengthen the insertion of the positioning protrusion 11 and the positioning groove 21. In this case, since the limiting card slot 211 is provided on the outer wall of the positioning protrusion 11, the wall thickness of the positioning protrusion 11 will be reduced, so a second thickened portion is provided on the inner wall of the recessed groove 12, and the second thickened portion is arranged opposite to the limiting card slot 211 to compensate for the loss of strength of the positioning protrusion 11 due to the provision of the limiting card slot 211, and to prevent the positioning protrusion 11 from being deformed due to being squeezed when inserted into the positioning groove 21.

[0065] like Figure 1 , Figure 2 As shown in FIG. 9 , a plurality of positioning protrusions 11 and positioning grooves 21 are provided, and the plurality of positioning protrusions 11 and the plurality of positioning grooves 21 are plugged in one-to-one correspondence to improve the installation stability between the bracket 1 and the module upper cover 2. The plurality of positioning protrusions 11 are asymmetrically distributed relative to at least one center line of the bracket 1, so that the plurality of positioning protrusions 11 constitute a foolproof component to avoid the bracket 1 from being installed in the wrong orientation relative to the module upper cover 2.

[0066] The distribution of the positioning protrusions 11 on the bracket 1 is the same as the distribution of the positioning grooves 21 (convex bulge structures 22) on the module upper cover 2. For example, see Fig. 9 The plurality of convex structures 22 are arranged relative to the module upper cover 2 along the length direction (i.e. Fig. 9 The center lines of the module cover 2 and the bracket 1 are asymmetrically distributed. When the module cover 2 and the bracket 1 are installed upside down, the multiple positioning protrusions 11 cannot be plugged into the multiple positioning grooves 21 one by one.

[0067] See also Figure 8 The cross-sectional areas of the positioning protrusion 11 and the positioning groove 21 gradually decrease along the plug-in direction a, and there is a certain error tolerance when the positioning protrusion 11 is inserted into the positioning groove 21, making the plug-in smoother. Even if there is a slight deviation between the positioning protrusion 11 and the positioning groove 21, they can be plugged into place smoothly.

[0068] Continue reading Figure 8 The top and bottom of the positioning protrusion 11 are both provided with a first rounded corner 112, and the notch and bottom of the positioning groove 21 are both provided with a second rounded corner 212. Further, the bottom and notch of the concave groove 12 are both provided with a third rounded corner 121, and the top and bottom of the convex hull structure 22 are both provided with a fourth rounded corner 222. Such a configuration makes the overall wall thickness of the positioning protrusion 11 more uniform, and the overall wall thickness of the convex hull structure 22 more uniform, avoiding stress concentration at the top and bottom of the two.

[0069] This embodiment also provides a battery module, including a battery cell and the bracket fixing assembly as described above, see Figure 2 and Figure 3 A busbar assembly is provided on the side of the bracket 1 of the bracket fixing assembly facing the module upper cover 2. A plurality of battery cells are provided, and the busbar assembly includes a plurality of busbars 4, and the plurality of busbars 4 are electrically connected to the plurality of battery cells to realize the output of electrical signals. Specifically, the busbar 4 is bonded and fixed to the bracket 1 by double-sided adhesive 5, which is firm and reliable, and quick to install. Two connecting plates 6 are provided on the busbar assembly, and the battery module can be connected to other battery modules or the signal of the battery module can be led to the battery management system through the two connecting plates 6.

[0070] A pressure relief hole 13 is provided on the bracket 1 corresponding to each battery cell, and the pressure relief hole 13 is directly opposite to the pressure relief valve on the battery cell cover.

[0071] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A bracket fixing assembly, characterized in that: It comprises a bracket (1) and a module upper cover (2); A positioning protrusion (11) is provided on one of the bracket (1) and the module upper cover (2), and a positioning groove (21) is provided on the other of the bracket (1) and the module upper cover (2), and the positioning protrusion (11) is inserted into the positioning groove (21); One of the bracket (1) and the module upper cover (2) is provided with buckles (3) on at least two opposite sides, and the bracket (1) and the module upper cover (2) are connected via the buckles (3).

2. The bracket fixing assembly according to claim 1, characterized in that: The buckle (3) comprises a first clamping plate (31) and a second clamping plate (32) connected at an angle, and the first clamping plate (31) and the second clamping plate (32) both extend along the side of the module upper cover (2); One end of the first clamping plate (31) away from the second clamping plate (32) is bent and connected to one of the bracket (1) and the module upper cover (2), and the second clamping plate (32) is hooked on the other of the bracket (1) and the module upper cover (2).

3. The bracket fixing assembly according to claim 1, characterized in that: A plurality of the buckles (3) are arranged at intervals on one side of the bracket (1) or the module upper cover (2), and the buckles (3) include a connected cantilever (33) and a hook (34); One end of the cantilever (33) away from the hook (34) is connected to one of the bracket (1) and the module upper cover (2), and the hook (34) is hooked on the other of the bracket (1) and the module upper cover (2).

4. The bracket fixing assembly according to claim 1, characterized in that: The positioning protrusion (11) is integrally arranged on the bracket (1), and a recessed groove (12) is formed on the side of the positioning protrusion (11) facing away from the module upper cover (2); a convex structure (22) is integrally provided on the side of the module upper cover (2) facing away from the bracket (1), and the positioning groove (21) is formed on the side of the convex structure (22) facing the bracket (1).

5. The bracket fixing assembly according to claim 4, characterized in that: A limiting clamping protrusion (111) is provided on one of the outer wall of the positioning protrusion (11) and the inner wall of the positioning groove (21), and a limiting clamping groove (211) is provided on the other of the outer wall of the positioning protrusion (11) and the inner wall of the positioning groove (21), and the limiting clamping protrusion (111) is clamped in the limiting clamping groove (211).

6. The bracket fixing assembly according to claim 5, characterized in that: The limiting slot (211) is provided on the inner wall of the positioning groove (21), and the outer wall of the convex structure (22) is provided with a first thickened portion (221), and the first thickened portion (221) is arranged opposite to the limiting slot (211); Alternatively, the limiting slot (211) is provided on the outer wall of the positioning protrusion (11), and the inner wall of the recessed groove (12) is provided with a second thickened portion, and the second thickened portion is arranged opposite to the limiting slot (211).

7. The bracket fixing assembly according to any one of claims 1 to 6, characterized in that: A plurality of the positioning protrusions (11) and the positioning grooves (21) are provided, and the plurality of positioning protrusions (11) and the plurality of positioning grooves (21) are plugged in one-to-one correspondence; the plurality of positioning protrusions (11) are asymmetrically distributed relative to at least one center line of the bracket (1).

8. The bracket fixing assembly according to any one of claims 1 to 6, characterized in that: The cross-sectional area of ​​the positioning protrusion (11) and / or the cross-sectional area of ​​the positioning groove (21) gradually decreases along the plugging direction, and the plugging direction is the direction in which the positioning protrusion (11) is inserted into the positioning groove (21).

9. The bracket fixing assembly according to any one of claims 1 to 6, characterized in that: The top and bottom ends of the positioning protrusion (11) are both provided with first rounded corners (112); And / or, the notch opening and the groove bottom of the positioning groove (21) are both provided with a second rounded corner (212).

10. A battery module, characterized in that: It comprises a battery cell and a bracket fixing assembly as described in any one of claims 1 to 9, wherein a bus assembly is arranged on a side of the bracket (1) facing the module upper cover (2), a plurality of battery cells are arranged, and the bus assembly is electrically connected to the plurality of battery cells.

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