Copper bar fixing device and battery pack

Abstract

The invention discloses a copper bar fixing device and a battery pack, and belongs to the technical field of new energy. Since each mounting part in the copper bar fixing device is provided with the accommodating cavity and the inlet end communicated with the accommodating cavity, and the elastic limiting structure is arranged at the inlet end, the elastic limiting structure allows the copper bar to smoothly enter the accommodating cavity through the inlet end, and meanwhile, the copper bar is effectively prevented from sliding out of the accommodating cavity. Therefore, when the copper bar is installed, the installation process can be completed only by pushing the copper bar into the accommodating cavity from the inlet end. By means of the design, a more stable fixing mode is provided for the copper bars, the copper bars located in the containing cavities cannot slide out of the containing cavities through the elastic limiting structures, the fixing firmness is further enhanced, and therefore the overall reliability of the battery pack is improved. In addition, through the design, the installation steps of the copper bar can be simplified, the installation complexity is reduced, and the whole installation process is simpler, more convenient and more efficient.

Description

Technical Field

[0001] The present application relates to the field of new energy technology, and in particular to a copper busbar fixing device and a battery pack. Background Art

[0002] In new energy vehicle battery packs, copper busbars and wiring harnesses play a vital role as key connecting components between high-voltage circuits and low-voltage circuits. Copper busbars are mainly used to connect high-voltage circuits between battery modules. Their fixing method not only affects the spatial layout efficiency of the battery pack, but is also directly related to the reliability and safety of electrical connections under complex working conditions such as vibration and impact.

[0003] At present, copper bars are usually fixed with annular collars. However, since copper bars are usually flat and do not match the shape of the annular collar, this fixing method often fails to ensure the firmness of the copper bars, and is prone to loosening or even falling off, thus affecting the reliability of the battery pack. Summary of the invention

[0004] The embodiment of the present application provides a copper busbar fixing device and a battery pack, which can improve the firmness of the copper busbar fixing in the battery pack. The technical solution is as follows:

[0005] On the one hand, a copper busbar fixing device is provided, comprising:

[0006] A fixing portion and two mounting portions;

[0007] The fixing portion is used to connect with the battery pack box;

[0008] The two mounting parts are respectively connected to two sides of the fixing part;

[0009] Each of the mounting portions extends along the first direction, and each of the mounting portions has a receiving cavity and an entry end, the entry end is located at a side of the mounting portion away from the fixing portion, and the entry end is provided with an elastic limiting structure;

[0010] The elastic limiting structure is used to allow the copper busbar to enter the accommodating cavity and prevent the copper busbar from sliding out of the accommodating cavity.

[0011] Optionally, the elastic limiting structure comprises a first elastic blocking piece and a second elastic blocking piece which are arranged opposite to each other, and the first elastic blocking piece and the second elastic blocking piece are located at the entrance end of the mounting portion;

[0012] The first elastic blocking piece and the second elastic blocking piece are configured to bend under force to avoid the copper bar when the copper bar enters the accommodating cavity, and to return to the original position to block the copper bar after the copper bar is located in the accommodating cavity.

[0013] Optionally, the mounting portion includes a first plate body and a second plate body that are arranged opposite to each other, and a support plate for connecting the first plate body and the second plate body, and the support plate is connected to the fixing portion;

[0014] The first elastic blocking piece is connected to a side of the first plate body away from the support plate and extends toward the second plate body, and the second elastic blocking piece is connected to a side of the second plate body away from the support plate and extends toward the first plate body;

[0015] Wherein, the first plate body, the second plate body, the support plate, the first elastic blocking piece and the second elastic blocking piece are used to enclose the accommodating cavity.

[0016] Optionally, the first elastic blocking piece is perpendicular to the first plate body, and the second elastic blocking piece is perpendicular to the second plate body.

[0017] Optionally, the orthographic projections of the first elastic blocking piece and the second elastic blocking piece on a target plane overlap, and the target plane is a plane parallel to the support plate and perpendicular to the first plate body and the second plate body.

[0018] Optionally, the inner wall of the accommodating cavity has a first recessed portion and a second recessed portion, the first recessed portion is located between the first plate body and the first elastic blocking piece, and the second recessed portion is located between the second plate body and the second elastic blocking piece.

[0019] Optionally, the fixing portion has a plurality of connection holes distributed along the first direction, and the plurality of connection holes include two first connection holes located at the outermost sides, and a plurality of second connection holes located between the two first connection holes;

[0020] The copper busbar fixing device also includes a first fastener, which can pass through the second connecting hole and be connected to the battery pack body.

[0021] Optionally, the copper busbar fixing device further includes a second fastener, and the second fastener can pass through the first connecting hole and be connected to the battery pack box;

[0022] Wherein, the second fastener has an annular collar, and the annular collar is used to fix the wiring harness.

[0023] Optionally, the bottom of the mounting portion has a bearing groove, and a colloid portion located in the bearing groove.

[0024] In another aspect, a battery pack is provided, comprising:

[0025] Box, copper bar fixture and battery module;

[0026] The copper bar fixing device and the battery module are located in the box body, the copper bar fixing device is connected to the box body, the battery module is connected to the copper bar, and the copper bar fixing device is any of the copper bar fixing devices described above.

[0027] The beneficial effects brought by the technical solution provided by the embodiment of the present application include at least:

[0028] Since each mounting portion in the copper busbar fixing device has a accommodating cavity and an entry end connected to the accommodating cavity, and an elastic limiting structure is also provided at the entry end, the elastic limiting structure allows the copper busbar to smoothly enter the accommodating cavity through the entry end, while effectively preventing the copper busbar from slipping out of the accommodating cavity. Therefore, when installing the copper busbar, it is only necessary to push the copper busbar from the entry end into the accommodating cavity to complete the installation process. This design not only provides a more stable fixing method for the copper busbar, but also prevents the copper busbar located in the accommodating cavity from slipping out of the accommodating cavity through the elastic limiting structure, so as to further enhance the firmness of the fixation, thereby improving the overall reliability of the battery pack. In addition, this design can also simplify the installation steps of the copper busbar, reduce the complexity of the installation, and make the entire installation process simpler and more efficient. This not only improves the installation efficiency, but also facilitates subsequent maintenance and replacement work. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 It is a structural schematic diagram of a copper busbar fixing device provided in an embodiment of the present application;

[0031] Figure 2 is a schematic structural diagram of another copper busbar fixing device provided in an embodiment of the present application;

[0032] Figure 3 It is a structural schematic diagram of another copper busbar fixing device provided in an embodiment of the present application;

[0033] Figure 4 is a structural schematic diagram of another copper busbar fixing device provided in an embodiment of the present application;

[0034] Figure 5 is a structural schematic diagram of a copper busbar fixing device provided by another embodiment of the present application;

[0035] Figure 6 It is a structural schematic diagram of another copper busbar fixing device provided in another embodiment of the present application. DETAILED DESCRIPTION

[0036] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below in conjunction with the accompanying drawings.

[0037] Please refer to Figure 1 and Figure 2 , Figure 1 is a schematic structural diagram of a copper busbar fixing device provided in an embodiment of the present application, Figure 2 1 is a schematic diagram of the structure of another copper busbar fixing device provided in an embodiment of the present application. The copper busbar fixing device 000 may include a fixing portion 100 and two mounting portions 200.

[0038] The fixing portion 100 in the copper busbar fixing device 000 can be used to connect with the battery pack box.

[0039] The two mounting parts 200 in the copper busbar fixing device 000 can be connected to the two sides of the fixing part 100. That is, the fixing part 100 is connected to one mounting part 200 on each of its two sides.

[0040] Each mounting portion 200 in the copper busbar fixing device 000 may extend along the first direction X, and each mounting portion 200 may have a receiving cavity C and an entry end K connected to the receiving cavity C, the entry end K may be located on the side of the mounting portion 200 away from the fixing portion 100, and the entry end K may be provided with an elastic limiting structure A. It should be noted that the first direction X is parallel to the extension direction of the copper busbar 001.

[0041] The elastic limiting structure A disposed at the entry end K can be used to allow the copper busbar 001 to enter the accommodating cavity C and prevent the copper busbar 001 from sliding out of the accommodating cavity C.

[0042] In the embodiment of the present application, since each mounting portion 200 in the copper bar fixing device 000 has a receiving cavity C and an entry end K, and an elastic limiting structure A is also provided at the entry end K, the elastic limiting structure A allows the copper bar 001 to smoothly enter the receiving cavity C through the entry end K, and effectively prevents the copper bar 001 from sliding out of the receiving cavity C. Therefore, when installing the copper bar 001, it is only necessary to place the copper bar 001 into the receiving cavity C from the entry end K to complete the installation process. This design not only provides a more stable fixing method for the copper bar 001, but also prevents the copper bar 001 located in the receiving cavity C from sliding out of the receiving cavity C through the elastic limiting structure A, so as to further enhance the firmness of the fixation, thereby improving the overall reliability of the battery pack. In addition, the design can also simplify the installation steps of the copper bar 001, reduce the complexity of the installation, and make the entire installation process simpler and more efficient. This not only improves the installation efficiency, but also facilitates subsequent maintenance and replacement work.

[0043] In summary, an embodiment of the present application provides a copper busbar fixing device, comprising: a fixing portion and two mounting portions. Since each mounting portion in the copper busbar fixing device has a accommodating cavity and an entry end connected to the accommodating cavity, and an elastic limiting structure is also provided at the entry end, the elastic limiting structure allows the copper busbar to smoothly enter the accommodating cavity through the entry end, while effectively preventing the copper busbar from slipping out of the accommodating cavity. Therefore, when installing the copper busbar, the installation process can be completed by simply pushing the copper busbar from the entry end into the accommodating cavity. This design not only provides a more stable fixing method for the copper busbar, but also prevents the copper busbar located in the accommodating cavity from slipping out of the accommodating cavity through the elastic limiting structure, so as to further enhance the firmness of the fixation, thereby improving the overall reliability of the battery pack.

[0044] In addition, this design can also simplify the installation steps of the copper busbar, reduce the installation complexity, and make the entire installation process simpler and more efficient. This not only improves the installation efficiency, but also facilitates subsequent maintenance and replacement work.

[0045] In the examples of this application, please refer to Figure 3 , Figure 3 Schematic diagram of another copper busbar fixing device provided in the embodiment of the present application. Figure 3 As shown, the elastic limiting structure A disposed at the entry end K may include a first elastic blocking piece 201 and a second elastic blocking piece 202 disposed opposite to each other, and the first elastic blocking piece 201 and the second elastic blocking piece 202 may be located at the entry end K of the mounting portion 200. For example, the first elastic blocking piece 201 and the second elastic blocking piece 202 both extend along the first direction X.

[0046] The first elastic blocking piece 201 and the second elastic blocking piece 202 are configured to bend under force to avoid the copper busbar 001 when the copper busbar 001 enters the accommodating cavity C, and reset to block the copper busbar 001 after the copper busbar 001 is located in the accommodating cavity C.

[0047] In this case, when the copper bar 001 is placed into the accommodation cavity C through the entry end K, the copper bar 001 will first contact the first elastic baffle 201 and the second elastic baffle 202. Due to the driving force applied by the copper bar 001, the first elastic baffle 201 and the second elastic baffle 202 will bend into the accommodation cavity C, thereby providing enough space for the copper bar 001 to enter the accommodation cavity C.

[0048] After the copper bar 001 completely enters the accommodation cavity C, the first elastic blocking piece 201 and the second elastic blocking piece 202 will automatically reset without external force, thereby effectively blocking the copper bar 001. In this way, it can be ensured that the copper bar 001 will not easily slip out of the accommodation cavity C even under complex working conditions such as vibration and impact, thereby improving the firmness of the copper bar 001 and further improving the reliability of the battery pack.

[0049] Optional, such as Figure 3 As shown, the mounting portion 200 in the copper busbar fixing device 000 may include a first plate body 203 and a second plate body 204 arranged opposite to each other, and a support plate 205 for connecting the first plate body 203 and the second plate body 204, and the support plate 205 may also be connected to the fixing portion 100. In this way, the two mounting portions 200 in the copper busbar fixing device 000 may be connected to both sides of the fixing portion 100 through the support plate 205, respectively.

[0050] In the present application, the first elastic blocking piece 201 in the elastic limiting structure A can be connected to the side of the first plate body 203 away from the support plate 205 and extend toward the second plate body 204, and the second elastic blocking piece 202 in the elastic limiting structure A can be connected to the side of the second plate body 204 away from the support plate 205 and extend toward the first plate body 203.

[0051] The first plate body 203 , the second plate body 204 , the support plate 205 , the first elastic blocking piece 201 and the second elastic blocking piece 202 are used to enclose the accommodating cavity C.

[0052] In this case, when the copper bar 001 is placed into the accommodation cavity C through the entry end K, it will first contact the first elastic baffle 201 and the second elastic baffle 202. Due to the driving force applied by the copper bar 001, the first elastic baffle 201 is bent toward the inside of the accommodation cavity C around the connection between the first elastic baffle 201 and the first plate 203, and the second elastic baffle 202 is bent toward the inside of the accommodation cavity C around the connection between the second elastic baffle 202 and the second plate 204, thereby providing enough space for the copper bar 001 to smoothly enter the accommodation cavity C.

[0053] After the copper bar 001 completely enters the accommodation cavity C, the first elastic baffle 201 and the second elastic baffle 202 will automatically rebound to the initial position without external force, that is, the first elastic baffle 201 will bend around the connection between the first elastic baffle 201 and the first plate 203 to restore to the original unstressed state, and the second elastic baffle 202 will bend around the connection between the second elastic baffle 202 and the second plate 204 to restore to the original unstressed state. In this way, an effective blocking structure can be formed by the first elastic baffle 201 and the second elastic baffle 202 to prevent the copper bar 001 from slipping out of the accommodation cavity C. This not only ensures the simplicity of the installation process, but also enhances the reliability of the fixation.

[0054] In the embodiments of the present application, Figure 3 As shown, the first elastic blocking piece 201 in the elastic limiting structure A may be perpendicular to the first plate body 203 , and the second elastic blocking piece 202 in the elastic limiting structure A may be perpendicular to the second plate body 204 .

[0055] In this case, since the first elastic baffle 201 is perpendicular to the first plate 203, and the second elastic baffle 202 is perpendicular to the second plate 204, after the copper busbar 001 completely enters the accommodating cavity C, the first elastic baffle 201 and the second elastic baffle 202 will automatically reset to be perpendicular to the first plate 203 and the second plate 204, respectively, thereby forming a tight blocking structure. This vertical reset can more effectively prevent the copper busbar 001 from slipping out of the accommodating cavity C. In addition, the vertical design allows the elastic baffle to achieve an effective limiting function without increasing the additional space requirements. Therefore, the copper busbar fixing device 000 can minimize the volume while ensuring performance, thereby improving the space utilization inside the battery pack, helping to optimize the overall layout and improve energy density.

[0056] Optional, such as Figure 3 As shown, the orthographic projections of the first elastic blocking piece 201 and the second elastic blocking piece 202 in the elastic limiting structure A on the target plane overlap. The target plane is a plane parallel to the support plate 205 and perpendicular to the first plate body 203 and the second plate body 204 .

[0057] In this case, since the orthographic projections of the first elastic blocking piece 201 and the second elastic blocking piece 202 on the target plane overlap, a tighter blocking structure can be formed after the first elastic blocking piece 201 and the second elastic blocking piece 202 are reset. In this way, even if subjected to a large external force or vibration, the copper bar 001 is not easy to slide out of the accommodation cavity C, providing a stronger fixing effect.

[0058] In the embodiments of the present application, Figure 3 As shown, the inner wall of the accommodating cavity C may have a first recessed portion U1 and a second recessed portion U2 , wherein the first recessed portion U1 is located between the first plate 203 and the first elastic blocking piece 201 , and the second recessed portion U2 is located between the second plate 204 and the second elastic blocking piece 202 .

[0059] In this case, the first recessed portion U1 is located between the first plate 203 and the first elastic baffle 201, and the second recessed portion U2 is located between the second plate 204 and the second elastic baffle 202. The design of these recessed portions provides additional operating space for the elastic baffles, so that when the copper bar 001 is placed, the first elastic baffle 201 and the second elastic baffle 202 can be bent more smoothly, effectively avoiding the problem of stagnation or deformation caused by space limitation.

[0060] In addition, the first recessed portion U1 and the second recessed portion U2 not only help to disperse the stress generated by the elastic baffle during the bending process and prevent damage caused by local stress concentration, thereby extending the service life of the elastic baffle, but also improve the reliability of the entire fixing device.

[0061] Figure 4 is a schematic diagram of the structure of another copper busbar fixing device provided in an embodiment of the present application. Figure 4 As shown, the fixing part 100 in the copper busbar fixing device 000 may have a plurality of connection holes distributed along the first direction X, and the plurality of connection holes may include two first connection holes M1 located at the outermost sides, and a plurality of second connection holes M2 located between the two first connection holes M1. For example, the number of the first connection holes M1 and the number of the second connection holes M2 are both two.

[0062] The copper busbar fixing device 000 may further include a first fastener 400 , which can pass through the second connection hole M2 and be connected to the battery pack body.

[0063] In this case, the fixing part 100 is provided with a plurality of connection holes, wherein the first fastener 400 can be passed through the corresponding second connection hole M2 and tightened to achieve a stable connection between the fixing part 100 and the battery pack body. This method not only simplifies the installation process, reduces the complicated alignment and adjustment steps, but also significantly improves the installation efficiency.

[0064] In addition, this stable fixing method ensures that the copper busbar 001 will not be displaced or loosened during use, thereby ensuring the continuous stability and safety of the electrical connection.

[0065] In the examples of this application, please refer to Figure 4 and Figure 5 , Figure 5 000 is a schematic diagram of the structure of a copper busbar fixing device provided in another embodiment of the present application. The copper busbar fixing device 000 may also include a second fastener 300, which can pass through the first connection hole M1 and connect to the battery pack box.

[0066] The second fastener 300 may have an annular collar 301 , and the annular collar 301 is used to fix the wire harness 002 .

[0067] In this case, the copper busbar fixing device 000 can be connected to the battery pack case not only by passing the first fastener 400 through the second connection hole M2, but also by passing the second fastener 300 through the first connection hole M1. In this way, multi-point fixing is achieved by passing the first fastener 400 and the second fastener 300 through different connection holes, which significantly enhances the connection strength between the fixing part 100 and the battery pack case, thereby improving the stability and reliability of the overall structure.

[0068] For example, the installation method can be flexibly adjusted according to specific needs by selecting different fasteners and connecting holes, such as using the first fastener 400 for conventional fixing and using the second fastener 300 for additional reinforcement or fixing at a specific position, or using the second fastener 300 for conventional fixing and using the first fastener 400 for additional reinforcement or fixing at a specific position, thereby improving the flexibility of installing the copper busbar fixing device 000 and the battery pack case.

[0069] In addition, the second fastener 300 has an annular clamp 301, which can be used to fix the wiring harness 002, so that the fixing function of the wiring harness 002 can be integrated into the copper busbar fixing device 000, reducing the need for a separate bracket for fixing the wiring harness 002 and saving space inside the battery pack.

[0070] It should also be noted that, although the above-mentioned copper busbar fixing device 000 integrates multiple functions, the overall device does not increase the additional space requirements. On the contrary, this design, through reasonable layout, realizes more effective fixing of the copper busbar 001 and management of the wiring harness 002 in a limited space, optimizes the space utilization inside the battery pack, and thus improves the overall performance of the battery pack.

[0071] Optional, such as Figure 4 As shown, the second fastener 300 may also have a connecting portion 302, wherein one end of the connecting portion 302 is connected to the annular collar 301, and the other end of the connecting portion 302 can pass through the first connecting hole M1 and connect to the battery pack body. For example, the connecting portion 302 may be a locking member with an external thread.

[0072] In other implementations, the connection portion 302 may also be replaced with a similar snap-on connector, which is not specifically limited in the present application.

[0073] Figure 6 is a schematic diagram of the structure of another copper busbar fixing device provided in another embodiment of the present application. Figure 6 As shown, the bottom of the mounting portion 200 in the copper busbar fixing device 000 may have a bearing groove P, and a colloid portion (not shown) located in the bearing groove P. For example, the colloid portion may be epoxy resin, UV curing glue or other adhesives suitable for industrial applications.

[0074] In this case, not only can the copper bar fixing device 000 and the battery pack case be fixed at multiple points by the first fastener 400 and the second fastener 300, but the connection stability between the copper bar fixing device 000 and the battery pack case can also be further enhanced by the colloid part. This combined design not only provides mechanical fixing strength, but also ensures the firmness and long-term reliability of the connection through the bonding effect of the colloid.

[0075] In addition, the colloid part can provide a buffering effect in a vibration or shock environment, reducing the movement of the copper busbar 001 caused by external vibration. For example, materials such as epoxy resin or UV curing glue have good shock absorption properties and can effectively absorb vibration energy to prevent the copper busbar 001 from shifting or loosening during use. The colloid part can not only absorb vibration, but also provide additional protection when it is impacted, preventing the copper busbar 001 and other electrical components from being damaged, thereby improving the reliability and durability of the overall system.

[0076] In the present application, the fixing part 100 in the copper busbar fixing device 000 and the two mounting parts 200 connected to the two sides of the fixing part 100 are an integrally formed structure. In this way, the assembly error between different parts can be reduced, and the position of each mounting part 200 is ensured to be accurate, thereby improving the overall installation accuracy. At the same time, the one-piece design avoids the seams or weaknesses that may be caused by the traditional multi-component assembly, thereby enhancing the structural strength and stability of the entire fixing device. This enables the copper busbar fixing device 000 to provide more reliable support under complex working conditions such as vibration and impact.

[0077] In summary, the embodiment of the present application provides a copper bar fixing device, comprising: a fixing portion and two mounting portions. Since each mounting portion in the copper bar fixing device has a accommodating cavity and an entry end connected to the accommodating cavity, and an elastic limiting structure is also provided at the entry end, the elastic limiting structure allows the copper bar to smoothly enter the accommodating cavity through the entry end, while effectively preventing the copper bar from slipping out of the accommodating cavity. Therefore, when installing the copper bar, the installation process can be completed by simply pushing the copper bar from the entry end into the accommodating cavity. This design not only provides a more stable fixing method for the copper bar, but also prevents the copper bar located in the accommodating cavity from slipping out of the accommodating cavity through the elastic limiting structure, so as to further enhance the firmness of the fixation, thereby improving the overall reliability of the battery pack. In addition, the design can also simplify the installation steps of the copper bar, reduce the complexity of the installation, and make the entire installation process simpler and more efficient. This not only improves the installation efficiency, but also facilitates subsequent maintenance and replacement work.

[0078] The embodiment of the present application also provides a battery pack, which may include: a box, a copper bar fixing device and a battery module. The copper bar fixing device and the battery module are located in the box, and the copper bar fixing device can be connected to the box, and the battery module is connected to the copper bar, and the copper bar fixing device 000 is any of the copper bar fixing devices 000 described above.

[0079] It should be noted that the terms "first", "second", etc. in the specification and claims of the present disclosure are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present disclosure can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally indicates that the objects associated before and after are in an "or" relationship. The term "plurality" refers to two or more, unless otherwise clearly defined.

[0080] The above description is only an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A copper busbar fixing device, characterized in that: It comprises a fixing portion (100) and two mounting portions (200); The fixing portion (100) is used to be connected to a battery pack box; The two mounting parts (200) are respectively connected to two sides of the fixing part (100); Each of the mounting portions (200) extends along a first direction (X), and each of the mounting portions (200) has a receiving cavity (C) and an entry end (K), the entry end (K) being located on a side of the mounting portion (200) away from the fixing portion (100), and the entry end (K) being provided with an elastic limiting structure (A); The elastic limiting structure (A) is used to allow the copper busbar (001) to enter the accommodating cavity (C) and prevent the copper busbar (001) from sliding out of the accommodating cavity (C).

2. The copper busbar fixing device according to claim 1, characterized in that: The elastic limiting structure (A) comprises a first elastic blocking piece (201) and a second elastic blocking piece (202) which are arranged opposite to each other, wherein the first elastic blocking piece (201) and the second elastic blocking piece (202) are located at an entry end (K) of the mounting portion (200); The first elastic blocking piece (201) and the second elastic blocking piece (202) are configured to bend under force to avoid the copper busbar (001) when it enters the accommodating cavity (C), and to reset to block the copper busbar (001) after it is located in the accommodating cavity (C).

3. The copper busbar fixing device according to claim 2, characterized in that: The mounting portion (200) comprises a first plate body (203) and a second plate body (204) arranged opposite to each other, and a support plate (205) used to connect the first plate body (203) and the second plate body (204), wherein the support plate (205) is connected to the fixing portion (100); The first elastic blocking piece (201) is connected to a side of the first plate body (203) away from the support plate (205), and extends toward the second plate body (204); the second elastic blocking piece (202) is connected to a side of the second plate body (204) away from the support plate (205), and extends toward the first plate body (203); Wherein, the first plate body (203), the second plate body (204), the support plate (205), the first elastic blocking piece (201) and the second elastic blocking piece (202) are used to enclose the accommodating cavity (C).

4. The copper busbar fixing device according to claim 3, characterized in that: The first elastic blocking piece (201) is perpendicular to the first plate body (203), and the second elastic blocking piece (202) is perpendicular to the second plate body (204).

5. The copper busbar fixing device according to claim 4, characterized in that: The orthographic projections of the first elastic blocking piece (201) and the second elastic blocking piece (202) on a target plane overlap, and the target plane is a plane parallel to the support plate (205) and perpendicular to the first plate body (203) and the second plate body (204).

6. The copper busbar fixing device according to claim 3, characterized in that: The inner wall of the accommodating cavity (C) has a first recessed portion (U1) and a second recessed portion (U2), wherein the first recessed portion (U1) is located between the first plate body (203) and the first elastic blocking piece (201), and the second recessed portion (U2) is located between the second plate body (204) and the second elastic blocking piece (202).

7. The copper busbar fixing device according to any one of claims 1 to 6, characterized in that: The fixing portion (100) has a plurality of connection holes distributed along a first direction (X), the plurality of connection holes comprising two first connection holes (M1) located at the outermost sides, and a plurality of second connection holes (M2) located between the two first connection holes (M1); The copper busbar fixing device further comprises a first fastener (400), and the first fastener (400) is capable of passing through the second connection hole (M2) to connect the copper busbar fixing device to the battery pack case.

8. The copper busbar fixing device according to claim 7, characterized in that: The copper busbar fixing device further comprises a second fastener (300), and the second fastener (300) can pass through the first connection hole (M1) and be connected to the battery pack box; The second fastener (300) has an annular collar (301), and the annular collar (301) is used to fix the wiring harness.

9. The copper busbar fixing device according to any one of claims 1 to 6, characterized in that: The bottom of the mounting portion (200) is provided with a bearing groove (P) and a colloid portion located in the bearing groove (P).

10. A battery pack, characterized in that: include: A box body, a copper bar fixing device and a battery module, wherein the copper bar fixing device and the battery module are located in the box body, the copper bar fixing device is connected to the box body, the battery module is connected to the copper bar, and the copper bar fixing device is the copper bar fixing device described in any one of claims 1 to 9.

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