Fixing device for fixing copper bar and battery device

Abstract

The application provides a fixing device for fixing copper bars and a battery device. The fixing device comprises a fixing member with a fixing cavity, a first clamping member with a first clamping cavity and a second clamping member with a second clamping cavity. The fixing cavity penetrates the fixing member along a first direction, the first clamping member is arranged in the fixing cavity, and the first clamping cavity penetrates the first clamping member along the first direction; the first clamping cavity is used for clamping a first copper bar; the second clamping member is arranged in the fixing cavity and is arranged in a second direction and a third direction, which are different from the first direction, from the first clamping member; the second clamping cavity penetrates the second clamping member along the first direction; and the second clamping cavity is used for clamping a second copper bar. The first direction, the second direction and the third direction are perpendicular to each other. The application can improve the stability of the copper bars, prevent the copper bars from being deformed and improve the safety of the battery pack.

Description

Technical Field

[0001] This application relates to the field of fixing device technology, and in particular to a fixing device for fixing copper busbars and a battery device. Background Technology

[0002] With the rapid development of new energy vehicles, the power battery pack, as its core component, has placed higher demands on safety, reliability, and structural design. Inside the battery pack, the copper busbar, as a key conductive structural component, undertakes the task of current transmission between modules, between modules and electrical components, and between modules and high-voltage connectors.

[0003] However, the relevant technologies usually use ordinary clips for fixing, which makes the copper busbar unstable and prone to deformation or even breakage, reducing the safety performance of the battery pack. Utility Model Content

[0004] In view of the above problems, this application provides a fixing device and a battery device for fixing copper busbars, which can improve the stability of copper busbars, prevent copper busbars from deforming, and improve the safety of battery packs.

[0005] To achieve the above objectives, the embodiments of this application provide the following technical solutions:

[0006] In a first aspect, embodiments of this application provide a fixing device for fixing copper busbars, the fixing device being used for mounting on a battery pack, comprising:

[0007] A fastener having a fixed cavity, the fixed cavity penetrating the fastener along a first direction;

[0008] A first engaging member having a first engaging cavity is disposed within the fixed cavity, the first engaging cavity extending through the first engaging member along the first direction; wherein, the first engaging cavity is used to engage a first copper busbar;

[0009] A second engaging member having a second engaging cavity is disposed within the fixed cavity and is offset from the first engaging member in both the second and third directions; the second engaging cavity extends through the second engaging member along the first direction; wherein, the second engaging cavity is used to engage the second copper busbar;

[0010] The first direction, the second direction, and the third direction are all perpendicular to each other.

[0011] In one possible implementation, the fastener includes a first fastener and a second fastener, wherein in the third direction, the second fastener is connected to the first fastener and together with the first fastener to form the fastening cavity;

[0012] The first engaging member is disposed on the first fixing member, and the second engaging member is disposed on the second fixing member.

[0013] In one possible implementation, the fixing device includes a first limiting member located within the fixing cavity, the first limiting member having a first limiting cavity;

[0014] The first limiting member is disposed on the second fixing member, and the first limiting cavity and the first engaging cavity are disposed opposite to each other in the third direction.

[0015] In one possible implementation, the fixing device includes a second limiting member located within the fixing cavity, the second limiting member having a second limiting cavity;

[0016] The second limiting member is disposed on the first fixing member, and the second limiting cavity and the second engaging cavity are disposed opposite to each other in the third direction.

[0017] In one possible implementation, the first limiting member and the second limiting member are arranged in a centrally symmetrical manner with respect to the center of the fixed cavity;

[0018] The first limiting member includes a first limiting plate and a second limiting plate that are spaced apart along the second direction.

[0019] In one possible implementation, the first engaging member and the second engaging member are arranged in a centrally symmetrical manner with respect to the center of the fixing cavity;

[0020] The first engaging component includes a first engaging plate and a second engaging plate symmetrically arranged relative to a third direction, with the first engaging plate forming an acute angle with the third direction.

[0021] In one possible implementation, the second fixing member is slidably mounted on the first fixing member so that the second fixing member slides along the first direction.

[0022] In one possible implementation, the fixing device further includes at least one connector disposed on one side of the fixing member in a second direction for connection with the battery pack;

[0023] The connector includes a connecting post and at least two elastic claws, the at least two elastic claws being connected to the end of the connecting post opposite to the fixing member.

[0024] In one possible implementation, the fixing device further includes at least one wire harness fixing member disposed on the surface of the second fixing member opposite to the first fixing member.

[0025] Secondly, embodiments of this application provide a battery pack, including a battery pack, a first copper busbar, a second copper busbar, and the fixing device for fixing the copper busbar as described in the first aspect; the first copper busbar and the second copper busbar are respectively electrically connected to the battery pack;

[0026] The fixing device is installed on the battery pack, the first copper busbar passes through the fixing device and is engaged in the first engaging member, and the second copper busbar passes through the fixing device and is engaged in the second engaging member.

[0027] This application provides a fixing device for fixing copper busbars and a battery pack. By setting a first locking member and a second locking member in the fixing cavity, the second locking member and the first locking member are staggered in both the second and third directions, so that the first locking member and the second locking member are located at different heights and in different horizontal directions. In this way, the first locking member and the second locking member can fix the first copper busbar and the second copper busbar located at different heights, which greatly simplifies the internal structure of the battery, makes the internal space layout more reasonable and orderly, helps to improve the integration and heat dissipation efficiency of the battery pack, and further improves the overall performance and reliability of the battery pack.

[0028] In addition, the fixing device of this application can greatly improve the stability of the copper busbar fixing, effectively avoid the deformation or even breakage of the copper busbar due to unstable buckles, significantly improve the safety performance of the battery pack during use, and reduce the risk of safety accidents caused by copper busbar failure.

[0029] In addition to the technical problems solved by the embodiments of this application, the technical features constituting the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions described above, other technical problems solved by the fixing device and battery device for fixing copper busbars provided by the embodiments of this application, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further explained in detail in the specific implementation. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 A perspective view of the fixing device provided in the embodiments of this application;

[0032] Figure 2 A side view of the fixing device provided in an embodiment of this application;

[0033] Figure 3 A front view of the fixing device provided in an embodiment of this application;

[0034] Figure 4 An exploded view of the fixing device provided in the embodiments of this application.

[0035] Explanation of reference numerals in the attached figures:

[0036] 100: Fixing component; 110: First fixing component; 120: Second fixing component; 130: Fixing cavity;

[0037] 200: First locking component; 210: First locking cavity; 220: First locking plate; 230: Second locking plate;

[0038] 300: Second locking component; 310: Second locking cavity;

[0039] 400: First limiting component; 410: First limiting cavity; 420: First limiting plate; 430: Second limiting plate;

[0040] 500: Second limiting component; 510: Second limiting cavity;

[0041] 600: Connector; 610: Connecting post; 620: Flexible claw; 630: Support plate;

[0042] 700: Wire harness fastener. Detailed Implementation

[0043] As described in the background section, the relevant technologies typically use ordinary clips for fixing. This results in poor clip stability, which in turn affects the stability of the copper busbars, causing them to deform or even break, thus reducing the safety performance of the battery pack. Furthermore, when there are multiple copper busbars, such as two, their different heights mean that ordinary clips cannot simultaneously secure both busbars. Therefore, multiple clips are required, leading to a chaotic internal battery structure and increasing the safety risks of the battery pack.

[0044] To address the aforementioned technical problems, this application provides a fixing device and a battery device for fixing copper busbars. By providing a first locking member and a second locking member within the fixing cavity, with the second locking member and the first locking member being staggered in both a second and a third direction, the first locking member and the second locking member are located at different heights and in different horizontal directions. In this way, the first locking member and the second locking member can be used to fix the first copper busbar and the second copper busbar located at different heights, greatly simplifying the internal structure of the battery, making the internal space layout more reasonable and orderly, helping to improve the integration and heat dissipation efficiency of the battery pack, and further improving the overall performance and reliability of the battery pack.

[0045] In addition, the fixing device of this application can greatly improve the stability of the copper busbar fixing, effectively avoid the deformation or even breakage of the copper busbar due to unstable buckles, significantly improve the safety performance of the battery pack during use, and reduce the risk of safety accidents caused by copper busbar failure.

[0046] To make the above-mentioned objectives, features, and advantages of the embodiments of this application more apparent and understandable, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0047] Please refer to Figures 1 to 4 This application provides a fixing device for mounting on a battery pack, thereby fixing the copper busbars of the battery pack to improve the stability of the copper busbars.

[0048] Please refer to Figure 2 The fixing device includes a fixing member 100, which has a fixing cavity 130 extending through the fixing member 100 along a first direction, such that the fixing cavity 130 is a through cavity extending along the first direction. The first direction can be the length direction of the fixing member 100, i.e. Figure 1 In the X direction.

[0049] The fixing device also includes a first engaging member 200, which is disposed within the fixing cavity 130 and has a first engaging cavity 210 for engaging the first copper busbar. The first engaging cavity 210 extends along a first direction and penetrates the first engaging member 200.

[0050] The fixing device also includes a second engaging member 300, which is disposed within the fixing cavity 130 and is offset from the first engaging member 200 in both the second and third directions; wherein the first, second, and third directions are mutually perpendicular. The second direction is the width direction of the fixing member 100, i.e. Figure 1 The Y-direction is the height direction of the fixing part 100, that is... Figure 1 In the Z-direction.

[0051] The second engaging component 300 has a second engaging cavity 310, which extends through the second engaging component 300 along a first direction; the second engaging cavity 310 is used to engage the second copper busbar.

[0052] In this embodiment, the second snap-fit ​​component 300 and the first snap-fit ​​component 200 are staggered in both the second and third directions, so that the first snap-fit ​​component 200 and the second snap-fit ​​component 300 are located at different heights and in different horizontal directions. In this way, the first snap-fit ​​component 200 and the second snap-fit ​​component 300 can be used to fix the first copper busbar and the second copper busbar located at different heights, which greatly simplifies the internal structure of the battery device, makes the internal space layout more reasonable and orderly, helps to improve the integration and heat dissipation efficiency of the battery pack, and further improves the overall performance and reliability of the battery pack.

[0053] In addition, the fixing device of this application can greatly improve the stability of the copper busbar fixing, effectively avoid the deformation or even breakage of the copper busbar due to unstable buckles, significantly improve the safety performance of the battery pack during use, and reduce the risk of safety accidents caused by copper busbar failure.

[0054] This application embodiment also defines the dimensions of the fastener 100. For example, the length of the fastener 100 is L, the width of the fastener 100 is W, and the height of the fastener 100 is H. Wherein, 1 ≤ L / W ≤ 1.5, 2 ≤ L / H ≤ 3.

[0055] In addition, the fixing device is made of plastic, such as PP, PC, ABS, etc., and its molding process is injection molding.

[0056] It should be noted that the fastener 100 can be an integral structure or a split structure. For example, the fastener 100 includes a first fastener 110 and a second fastener 120. In the third direction, the second fastener 120 is connected to the first fastener 110 and together with the first fastener 110 forms a fixing cavity 130.

[0057] The first snap-fit ​​component 200 is mounted on the first fixing component 110, and the second snap-fit ​​component 300 is mounted on the second fixing component 120. This allows for the first snap-fit ​​component 200 to be installed on the first fixing component 110 first, and the second snap-fit ​​component 300 on the second fixing component 120 first, before assembling the first fixing component 110 and the second fixing component 120. This facilitates the installation of the first snap-fit ​​component 200 and the second snap-fit ​​component 300, significantly improving the assembly efficiency of the fixing device and shortening its production cycle.

[0058] It should be noted that the first fixing member 110 and the second fixing member 120 can be either fixedly connected or detachably connected. For example, the second fixing member 120 is slidably mounted on the first fixing member 110, allowing the second fixing member 120 to slide along a first direction. The second fixing member 120 can move along the first direction, thereby opening the fixing cavity 130. This allows for easy assembly and disassembly of the copper busbar even in situations with limited space.

[0059] The first fixing member 110 and the second fixing member 120 can slide using a slide rail and a slider. For example, please refer to... Figure 2 and Figure 4 The first fixing member 110 has a guide protrusion 111 on the side facing the fixing cavity 130. The second fixing member 120 has a guide groove 121 on the side facing away from the fixing cavity 130, and the guide protrusion 111 slides in the guide groove 121. Both the guide protrusion 111 and the guide groove 121 extend along a first direction. This improves the stability of the second fixing member 120 during sliding.

[0060] In some embodiments, the first engaging member 200 and the second engaging member 300 have the same structure, and the first engaging member 200 and the second engaging member 300 are centrally symmetrical with respect to the center of the fixing cavity 130.

[0061] The first engaging component 200 includes a first engaging plate 220 and a second engaging plate 230, which are symmetrically arranged with respect to a third direction, wherein the angle between the first engaging plate 220 and the third direction is an acute angle. Thus, the first engaging cavity 210 formed by the first engaging plate 220 and the second engaging plate 230 gradually decreases in size along the direction from the first fixing member 110 to the second fixing member 120, resulting in a smaller opening width. When the first copper busbar is engaged in the first engaging cavity 210, it can prevent the first copper busbar from detaching from the first engaging cavity, ensuring that the first copper busbar is always stably fixed within the engaging cavity. This guarantees the stability and reliability of the internal circuit connection of the battery pack and reduces the risk of electrical faults caused by loosening or detachment of the copper busbar. Correspondingly, the structure and beneficial effects of the second engaging component 300 are the same as those of the first engaging component 200, and will not be described in detail here.

[0062] In some embodiments, the fixing device includes a first limiting member 400 located within the fixing cavity 130, the first limiting member 400 having a first limiting cavity 410.

[0063] The first limiting member 400 is disposed on the second fixing member 120, and the first limiting cavity 410 and the first engaging cavity 210 are disposed opposite each other in a third direction. In other words, the first limiting cavity 410 is located directly above the first engaging cavity 210.

[0064] In this way, if the first copper busbar, which is engaged in the first engagement cavity 210, is jolted during use and moves along a third direction, the first copper busbar can still be engaged in the first limiting cavity 410 of the first limiting member 400. This can prevent the first copper busbar from moving in the second direction, thereby preventing the first copper busbar and the second copper busbar from contacting each other, preventing the first copper busbar and the second copper busbar from forming a short circuit, and thus improving the electrical safety of the battery device.

[0065] Furthermore, the fixing device also includes a second limiting member 500, which is located within the fixing cavity 130 and fixedly connected to the first fixing member 110. The second limiting member 500 has a second limiting cavity 510, which is disposed opposite to the second engaging cavity 310 in a third-dimensional direction, i.e., the second limiting cavity 510 is located directly below the second engaging cavity 310.

[0066] In this way, if the second copper busbar, which is engaged in the second engagement cavity 310, is jolted during use and moves along a third direction, the first copper busbar can still be engaged in the second limiting cavity 510 of the second limiting member 500. This can prevent the second copper busbar from moving in the second direction, thereby preventing the first copper busbar and the second copper busbar from contacting each other, preventing the first copper busbar and the second copper busbar from forming a short circuit, and thus improving the electrical safety of the battery device.

[0067] It should be noted that the first limiting member 400 and the second fixing member 120, and the second limiting member 500 and the first fixing member 110, can be connected by adhesive or be a one-piece molded structure. This can improve the stability of the entire fixing device.

[0068] In some embodiments, the first limiting member 400 and the second limiting member 500 are centrally symmetrically arranged with respect to the center of the fixing cavity 130; the first limiting member 400 includes a first limiting plate 420 and a second limiting plate 430 spaced apart along a second direction. The height directions of the first limiting plate 420 and the second limiting plate 430 are both parallel to the third direction. This simplifies the structure of the first limiting member 400 and the second limiting member 500.

[0069] In some embodiments, the fixing device further includes at least one connector 600, which is disposed on one side of the fixing member 100 in the second direction for connection with the battery pack.

[0070] For example, at least one connector 600 is disposed on one side of the first fastener 110 in the second direction. The number of connectors 600 can be one, two, or even more. The following embodiments all use two connectors 600 as an example, with the two connectors 600 arranged at intervals along the first direction.

[0071] The connector 600 includes a connecting post 610 and at least two elastic claws 620. One end of the connecting post 610 is connected to the first fixing member 110, and at least two elastic claws 620 are connected to the ends of the connecting post 610 that are away from the first fixing member 110, and there is an acute angle between the elastic claws 620 and the connecting post 610.

[0072] When the connector 600 is snap-fitted to the battery pack, for example, if the battery pack has snap-fit ​​holes, during the insertion of the connector 600 into the snap-fit ​​holes, at least two elastic claws 620 can generate a certain pre-tightening force, ensuring a tight fit between the connector 600 and the battery pack. This tight connection effectively prevents the connector 600 from loosening or falling off due to vibration, impact, or other factors during battery pack use, ensuring the stability and reliability of the connection between the connector 600 and the battery pack. Simultaneously, the snap-fit ​​structure typically has a certain elastic deformation capacity, which can absorb and buffer external forces to a certain extent, further improving the reliability of the connection.

[0073] The connector 600 provided in this embodiment further includes two support plates 630, which are spaced apart along a third direction and located on both sides of the connecting post 610. The distance between the two support plates 630 in the third direction gradually increases in the direction away from the first fixing member 110. In this way, the two support plates 630 can also abut against the battery pack to improve the connection strength between the fixing device and the battery pack.

[0074] Please refer to Figure 1 and Figure 3 In some embodiments, the fixing device further includes at least one wire harness fixing member 700, which is disposed on the surface of the second fixing member 120 opposite to the first fixing member 110. This can be used to fix high-voltage or low-voltage wire harnesses. This arrangement improves the neatness of the battery device's wire harness, thereby enhancing the safety of the battery device. It also improves the adaptability of the fixing device.

[0075] This application also provides a battery device, including a battery pack (not shown in the figure), a first copper busbar (not shown in the figure), a second copper busbar (not shown in the figure), and a fixing device for fixing the copper busbar as described in any of the above embodiments; the first copper busbar and the second copper busbar are respectively electrically connected to the battery pack.

[0076] The fixing device is installed on the battery pack. The first copper busbar passes through the fixing device and is engaged in the first engaging member. The second copper busbar passes through the fixing device and is engaged in the second engaging member.

[0077] In this way, the first and second copper busbars located at different heights can be fixed using the first and second clamping components 200 and 300, which greatly simplifies the internal structure of the battery device, makes the internal space layout more reasonable and orderly, helps to improve the integration and heat dissipation efficiency of the battery pack, and further enhances the overall performance and reliability of the battery pack.

[0078] It should be noted that the mounting positions of the fixing device and the battery pack can be freely set. They can be installed in reverse or on the side to accommodate two copper busbars on different planes but with the same extension direction.

[0079] The various embodiments or implementation methods described in this specification are presented in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other.

[0080] It should be noted that the terms "one embodiment," "embodiment," "exemplary embodiment," "some embodiments," etc., mentioned in the specification indicate that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0081] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A fixing device for fixing copper busbars, characterized in that, The fixing device is used for mounting to the battery pack, and the fixing device includes: A fastener having a fixed cavity, the fixed cavity penetrating the fastener along a first direction; A first engaging member having a first engaging cavity is disposed within the fixed cavity, the first engaging cavity extending through the first engaging member along the first direction; wherein, the first engaging cavity is used to engage a first copper busbar; A second engaging member having a second engaging cavity is disposed within the fixed cavity and is offset from the first engaging member in both the second and third directions; the second engaging cavity extends through the second engaging member along the first direction; wherein, the second engaging cavity is used to engage the second copper busbar; Wherein, the first direction, the second direction, and the third direction are perpendicular to each other.

2. The fixing device for fixing copper busbars according to claim 1, characterized in that, The fastener includes a first fastener and a second fastener. In the third direction, the second fastener is connected to the first fastener and together with the first fastener to form the fastening cavity. The first engaging member is disposed on the first fixing member, and the second engaging member is disposed on the second fixing member.

3. The fixing device for fixing copper busbars according to claim 2, characterized in that, The fixing device includes a first limiting member located within the fixing cavity, the first limiting member having a first limiting cavity; The first limiting member is disposed on the second fixing member, and the first limiting cavity and the first engaging cavity are disposed opposite to each other in the third direction.

4. The fixing device for fixing copper busbars according to claim 3, characterized in that, The fixing device includes a second limiting member located within the fixing cavity, the second limiting member having a second limiting cavity; The second limiting member is disposed on the first fixing member, and the second limiting cavity and the second engaging cavity are disposed opposite to each other in the third direction.

5. The fixing device for fixing copper busbars according to claim 4, characterized in that, The first limiting member and the second limiting member are arranged symmetrically with respect to the center of the fixed cavity; The first limiting member includes a first limiting plate and a second limiting plate that are spaced apart along the second direction.

6. The fixing device for fixing copper busbars according to any one of claims 1-5, characterized in that, The first engaging member and the second engaging member are arranged symmetrically with respect to the center of the fixing cavity; The first engaging component includes a first engaging plate and a second engaging plate symmetrically arranged relative to a third direction, with the first engaging plate forming an acute angle with the third direction.

7. The fixing device for fixing copper busbars according to any one of claims 2-5, characterized in that, The second fixing member is slidably mounted on the first fixing member so that the second fixing member slides along the first direction.

8. The fixing device for fixing copper busbars according to any one of claims 1-5, characterized in that, The fixing device further includes at least one connector, which is disposed on one side of the fixing member in the second direction and is used to connect to the battery pack; The connector includes a connecting post and at least two elastic claws, the at least two elastic claws being connected to the end of the connecting post opposite to the fixing member.

9. The fixing device for fixing copper busbars according to any one of claims 2-5, characterized in that, The fixing device further includes at least one wire harness fixing member, which is disposed on the surface of the second fixing member opposite to the first fixing member.

10. A battery device, characterized in that, It includes a battery pack, a first copper busbar and a second copper busbar, and a fixing device for fixing the copper busbar as described in any one of claims 1-9; the first copper busbar and the second copper busbar are respectively electrically connected to the battery pack; The fixing device is installed on the battery pack, the first copper busbar passes through the fixing device and is engaged in the first engaging member, and the second copper busbar passes through the fixing device and is engaged in the second engaging member.

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