BMS support and battery pack

Abstract

The utility model discloses a BMS support and a battery pack, and belongs to the technical field of lithium ion batteries, the support comprises a first support main body and a second support main body, the first support main body and the second support main body are respectively provided with mounting legs along the two sides of the respective arrangement direction, the mounting legs are used for mounting the first bracket main body and the second bracket main body on a battery box body; bosses are arranged on the surface of the first support body and the surface of the second support body and used for connecting the first support body and the second support body with a BMS component, and the contact area of the bosses and the BMS component is smaller than the surface area of the first support body and the surface area of the second support body. According to the utility model, noise generated by vibration can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of lithium-ion battery technology, specifically to a BMS bracket and battery pack. Background Technology

[0002] With the rapid development of electric vehicles, battery pack technology is also advancing rapidly. As the power source of electric vehicles, batteries need to be controlled by a battery management system (BMS), which is typically fixed inside the battery pack using a BMS bracket.

[0003] For example, Chinese patent document CN217009418U discloses a power battery BMS bracket and battery pack, including a bracket body: a wiring harness fixing structure extends from one end of the bracket body; the other end of the bracket body is fixedly connected to the bracket fixing structure; a BMS fixing structure is provided on the bracket body; wherein, the bracket body is used to set the fixing structure, the bracket fixing structure, and the BMS fixing structure; the wiring harness fixing structure is used to fix the wiring harness; the bracket fixing structure is used to fix the bracket; and the BMS fixing structure is used to fix the BMS. The BMS is fixed to the bracket by studs, and the BMS is directly in contact with and fixed to the bracket body by the studs; however, this fixing method will bring significant vibration and noise. Utility Model Content

[0004] The purpose of this invention is to provide a BMS bracket and battery pack, which solves the problem of significant vibration and noise caused by the direct contact and fixation of the BMS to the bracket body via studs in the prior art.

[0005] To achieve the above objectives, this utility model provides a BMS bracket, including a first bracket body and a second bracket body. The first bracket body and the second bracket body are respectively provided with mounting legs on both sides along their respective arrangement directions. The mounting legs are used to mount the first bracket body and the second bracket body onto a battery box. The surfaces of the first bracket body and the second bracket body are each provided with a boss. The boss is used to connect the first bracket body and the second bracket body to the BMS component. The contact area between the boss and the BMS component is smaller than the surface area of ​​the first bracket body and the second bracket body.

[0006] Through the above technical solution, the BMS component is connected to the first support body and the second support body through the boss. The BMS does not directly contact the first support body and the second support body. When vibration occurs, the contact area between the BMS component and the boss is smaller, that is, the area of ​​the sound source is smaller and the area of ​​sound radiation is smaller, which can reduce noise.

[0007] Furthermore, the first support body and the second support body are separate structures.

[0008] The first and second support bodies can be installed separately, adapting to more complex installation environments and avoiding the limitations of a monolithic structure. The modular structure also reduces material consumption and unnecessary structural connections between the two components.

[0009] Furthermore, the first bracket body includes a wire harness fixing part, which includes a wire harness surface and a mounting surface. The mounting surface and the wire harness surface form an angled structure. The mounting surface is connected to the first bracket body and is used to install a wire harness fixing buckle.

[0010] The mounting surface is fitted with wire harness fixing clips to secure the wire harness in a centralized manner, preventing it from becoming tangled. The mounting surface is parallel to the surface of the first bracket body, while the wire harness surface is folded perpendicularly to the mounting surface. The wire harness surface provides support for the wire harness as it passes through, increasing the tension of the wire harness and preventing it from loosening.

[0011] Furthermore, the mounting surface is provided with a reinforcing groove, which surrounds the mounting surface.

[0012] The reinforcing grooves on the mounting surface can improve the structural strength of the mounting surface. The reinforcing grooves are set around the mounting surface, making the middle part of the mounting surface bulge, thereby improving the pressure-bearing capacity.

[0013] Furthermore, both the wire harness surface and the mounting leg have flanged structures on their edges for the wire harness to pass through.

[0014] The flanged structure blunts the edges of the wire harness surface and the mounting legs, forming a curved edge. This avoids excessively sharp edges from cutting and damaging the wire harness, thus increasing electrical safety.

[0015] Furthermore, the mounting leg includes a connecting part, a wire-passing part, and a fixing part. The wire-passing part is connected to the connecting part, and the fixing part is connected to the wire-passing part. The connecting part and the fixing part are bent towards opposite sides of the wire-passing part, and the fixing part is parallel to the fixing surface.

[0016] The fixing part is parallel to the fixing surface, which facilitates the connection between the fixing part and the fixing surface and increases the connection stability. The connecting part connects the mounting leg to the first bracket body and the second bracket body, and the wire passing part can provide support for the wire harness that is bypassed.

[0017] Furthermore, the connecting part is connected to the first support body and arranged in a gradient, and a reinforcing rib is provided at the connection between the connecting part and the first support body.

[0018] The gradient arrangement creates a height difference between the mounting legs and the main body of the first bracket, providing ample space above the mounting legs for the placement of other components within the battery pack. Reinforcing ribs increase the structural strength of the connection points and improve the installation stability of the main body of the first bracket.

[0019] Furthermore, the first bracket body is provided with a copper busbar pressure strip on one side relative to the wire harness fixing part, and the copper busbar pressure strip is arranged along the length direction of the first bracket body.

[0020] Applying pressure strips to the edges of copper busbars can increase the reliability of copper busbar assembly.

[0021] Furthermore, the second support body has multiple cuts on its left and right sides along its own arrangement direction, and the multiple cuts make the second support body form a structure with continuous left and right bends.

[0022] Furthermore, the protrusion is provided at the location of the continuous left and right bends in the structure.

[0023] Furthermore, the mounting legs are connected at the locations of the continuously bent structures on the left and right sides.

[0024] Through the above technical solutions, multiple cuts can reduce the weight of the second support body. The second support body forms a continuous left-right bending structure, and bosses are set at the bending structure to connect the BMS components. The continuous left-right support points can increase the support and balance for the BMS components. Mounting legs are set at the continuous bending structure to improve the connection stability of the second support body.

[0025] Furthermore, a copper busbar is provided on each of the front and rear sides of the second support body along its arrangement direction, and the copper busbar is arranged perpendicular to the arrangement direction of the second support body.

[0026] The copper busbar pressure strips on the front and rear sides provide an assembly base for the copper busbar assemblies on the front and rear sides, thus ensuring assembly reliability.

[0027] This utility model also provides a battery pack, including a housing, a battery module, a housing cover, a BMS component, and the aforementioned BMS bracket. The BMS component is mounted on the BMS bracket, and the BMS bracket is connected to the housing. The battery module is disposed inside the housing, and the housing cover is connected to the housing and seals the battery module, BMS bracket, and BMS component.

[0028] The BMS bracket houses the BMS components inside the enclosure, reducing noise generated during vibration. The enclosure cover, in conjunction with the enclosure, seals the battery module, BMS bracket, and BMS components, providing protection for the internal components.

[0029] Furthermore, the housing is provided with at least two longitudinal beams, and the BMS bracket is mounted on the longitudinal beams via mounting legs on the left and right sides.

[0030] The longitudinal beams can divide the space within the enclosure, thus separating multiple battery modules and creating gaps between them. These gaps between the longitudinal beams and the battery modules are then used to route copper busbars and signal acquisition lines. Simultaneously, the longitudinal beams serve as BMS supports, improving the space utilization efficiency of the stacked modules.

[0031] Furthermore, the lid is provided with a protrusion, and the BMS bracket and BMS components are respectively arranged below the protrusion, making reasonable use of the space by utilizing the protruding position of the lid.

[0032] Compared with existing known technologies, the technical solution provided by this utility model has the following beneficial effects:

[0033] This utility model discloses a BMS bracket in which the BMS component is connected and fixed to the first bracket body and the second bracket body via a boss. The BMS component does not directly contact the surfaces of the first bracket body and the second bracket body. The contact area between the boss and the BMS component is smaller than the surface area of ​​the first bracket body and the second bracket body. When vibration occurs, because the contact area between the BMS component and the boss is smaller, that is, the area of ​​the sound source is smaller and the area of ​​sound radiation is smaller, it can bring less noise.

[0034] It is obvious that the elements or features described in the above individual embodiments can be used alone or in combination in other embodiments. Attached Figure Description

[0035] The dimensions and scales in the accompanying drawings do not represent the actual dimensions and scales of the product. The drawings are for illustrative purposes only, and some non-essential elements or features have been omitted for clarity.

[0036] Figure 1 This is a schematic diagram of the BMS bracket in an embodiment of this utility model;

[0037] Figure 2 This is a schematic diagram of the structure of the first support body in an embodiment of this utility model;

[0038] Figure 3 This is a schematic diagram of the structure of the second support body in an embodiment of this utility model;

[0039] Figure 4 This is an exploded view of the battery pack in an embodiment of this utility model;

[0040] Figure 5 This is a schematic diagram of the battery pack housing in an embodiment of this utility model.

[0041] Description of Reference Numerals

[0042] 100. First bracket body; 110. Wiring harness fixing part; 111. Wiring harness surface; 112. Mounting surface; 113. Reinforcing groove; 130. Flanged structure; 140. Reinforcing rib; 200. Second bracket body; 210. Cutout; 300. Boss; 400. Mounting leg; 410. Connecting part; 420. Wiring passage part; 430. Fixing part; 500. Copper busbar pressure strip; 600. Box body; 610. Longitudinal beam; 620. Battery module; 630. Box cover; 631. Protrusion; 640. BMS component. Detailed Implementation

[0043] The present invention will now be described in detail with reference to the accompanying drawings. The embodiments described herein are merely preferred embodiments of the present invention. Those skilled in the art can conceive of other ways to implement the present invention based on the preferred embodiments, and such other ways also fall within the scope of the present invention.

[0044] Example

[0045] Reference Figure 1-Figure 5 This embodiment provides a BMS bracket, including a first bracket body 100 and a second bracket body 200. The first bracket body 100 and the second bracket body 200 are respectively provided with mounting legs 400 on both sides along their respective arrangement directions. The mounting legs 400 are used to mount the first bracket body 100 and the second bracket body 200 onto a battery box 600. Both the first bracket body 100 and the second bracket body 200 are provided with bosses 300, which are used to connect the first bracket body 100 and the second bracket body 200 to a BMS component 640. Component 640 does not directly contact the surfaces of the first support body 100 and the second support body 200. The contact area between the boss 300 and the BMS component 640 is smaller than the surface area of ​​the first support body 100 and the second support body 200. In other words, the contact area between the boss 300 and the BMS component 640 is smaller than the surface area of ​​the first support body 100 and the second support body 200. When vibration occurs, because the contact area between the BMS component 640 and the boss 300 is smaller, that is, the area of ​​the sound source is smaller and the area of ​​sound radiation is smaller, the noise generated by vibration can be reduced.

[0046] Preferably, in some embodiments of this application, such as Figure 1 As shown, the first support body 100 and the second support body 200 are separate structures. This separate structure allows the first support body 100 and the second support body 200 to be installed separately, adapting to more complex installation environments and avoiding the limitations of a monolithic structure. The separate structure also reduces material consumption and unnecessary structural connections between the two. It is understood that the first support body 100 and the second support body 200 are sheet metal structures, and while meeting structural strength requirements, they are relatively thin overall.

[0047] Specifically, such as Figure 2 As shown, the first bracket body 100 includes a wire harness fixing part 110, which includes a wire harness surface 111 and a mounting surface 112. The mounting surface 112 and the wire harness surface 111 form an angled structure. The mounting surface 112 is connected to the first bracket body 100 and is used to install wire harness fixing clips, so that the wire harness can be centrally fixed and prevent the wire harness from becoming tangled. Specifically, the mounting surface 112 is parallel to the surface of the first bracket body 100, and the wire harness surface 111 is folded perpendicularly to the mounting surface 112. The wire harness surface 111 provides support for the wire harness, increases the tension of the wire harness, and prevents it from becoming loose.

[0048] Furthermore, the mounting surface 112 is provided with a reinforcing groove 113, which can improve the structural strength of the mounting surface 112. The reinforcing groove 113 is provided around the mounting surface 112, making the middle part of the mounting surface 112 protrude, improving the pressure-bearing capacity and preventing the mounting surface 112 from deforming under pressure. The edges of the wire harness surface 111 and the mounting leg 400 are each provided with a flange structure 130 for the wire harness to pass through. The flange structure 130 blunts the edges of the wire harness surface 111 and the mounting leg 400, forming a curved edge, which can avoid excessively sharp edges from cutting and damaging the wire harness, and increase electrical safety.

[0049] In some embodiments of this application, such as Figure 1 As shown, the mounting leg 400 includes a connecting portion 410, a wire-passing portion 420, and a fixing portion 430. The wire-passing portion 420 is connected to the connecting portion 410, and the fixing portion 430 is connected to the wire-passing portion 420. The connecting portion 410 and the fixing portion 430 are bent towards opposite sides of the wire-passing portion 420, forming a Z-shaped structure. The wire-passing portion 420 is perpendicular to both the connecting portion 410 and the fixing portion 430. The connecting portion 410 connects the mounting leg 400 to the first bracket body 100 and the second bracket body 200, respectively. The wire-passing portion 420 provides support for the bypassed wire harness. The fixing portion 430 is parallel to the fixing surface, facilitating connection between the fixing portion 430 and the fixing surface and increasing connection stability.

[0050] Understandably, the connecting part 410 is connected to the first bracket body 100 and arranged in a gradient. This gradient arrangement creates a height difference between the mounting leg 400 and the first bracket body 100, providing ample space above the mounting leg 400 for the arrangement of other components within the battery pack. A reinforcing rib 140 is provided at the connection between the connecting part 410 and the first bracket body 100. The reinforcing rib 140 increases the structural strength of the connecting part 410 and improves the installation stability of the first bracket body 100. The reinforcing rib 140 is a slightly curved cylinder, with its two ends connected to the first bracket body 100 and the connecting part 410, respectively. A copper busbar pressure strip 500 is provided on one side of the first bracket body 100 opposite to the wire harness fixing part 110, and the copper busbar pressure strip 500 is arranged along the length of the first bracket body 100. The copper busbar pressure strip 500 presses against the edge, increasing the reliability of the copper busbar assembly.

[0051] In some embodiments of this application, such as Figure 3 As shown, the second support body 200 has multiple cutouts 210 on its left and right sides along its own arrangement direction. These cutouts 210 create a structure with continuous left and right bends, reducing the weight of the second support body 200. Bosses 300 are provided at the locations of the continuous left and right bends to connect to the BMS component 640. The continuous left and right support points increase the support and balance of the BMS component 640. Mounting legs 400 are connected at the locations of the continuous left and right bends, improving the connection stability of the second support body 200. A copper busbar pressure strip 500 is provided on each of the front and rear sides of the second support body 200 along its arrangement direction, perpendicular to the arrangement direction of the second support body 200. The copper busbar pressure strips 500 on the front and rear sides provide an assembly base for the copper busbar assemblies on the front and rear sides, ensuring assembly reliability. It should be noted that the copper busbar pressure strip 500 is a long strip structure with grooves.

[0052] Another aspect of this application provides a battery pack, such as Figure 4 and Figure 5 As shown, the system includes a housing 600, a battery module 620, a cover 630, a BMS component 640, and the aforementioned BMS bracket. The BMS component 640 is mounted on the BMS bracket, which is connected to the housing 600. The battery module 620 is disposed inside the housing 600. The cover 630 is connected to the housing 600 and seals the battery module 620, the BMS bracket, and the BMS component 640. The BMS bracket houses the BMS component 640 inside the housing 600, reducing noise generated during vibration. The cover 630, in conjunction with the housing 600, seals the battery module 620, the BMS bracket, and the BMS component 640, providing protection for the internal components.

[0053] Furthermore, at least two longitudinal beams 610 are provided in the enclosure 600, and the BMS bracket is mounted on the longitudinal beams 610 via mounting legs 400 on both sides. The longitudinal beams 610 can divide the space of the enclosure 600, thereby separating multiple battery modules 620 and creating gaps between the battery modules 620. The gaps between the longitudinal beams 610 and the battery modules 620 are used to route copper busbars and signal acquisition lines. Simultaneously, using the longitudinal beams 610 to support the BMS bracket improves the space utilization efficiency of the stacked components inside the battery pack. A protrusion 631 is provided on the cover 630, and the BMS bracket and BMS components 640 are correspondingly positioned below the protrusion 631, making efficient use of the space by utilizing the protruding position of the cover 630's protrusion 631.

[0054] In the description of this utility model, it should be noted that the terms "front," "rear," "left," "right," "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0055] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0056] The scope of protection of this utility model is defined only by the claims. Thanks to the teachings of this utility model, those skilled in the art will readily recognize that alternative structures to the disclosed structure can be used as feasible alternative implementations, and that the disclosed implementations can be combined to produce new implementations, which also fall within the scope of the appended claims.

Claims

1. A BMS bracket, comprising a first bracket body (100) and a second bracket body (200), wherein the first bracket body (100) and the second bracket body (200) are respectively provided with mounting legs (400) on both sides along their respective arrangement directions, the mounting legs (400) being used to mount the first bracket body (100) and the second bracket body (200) onto a battery box; characterized in that, The first support body (100) and the second support body (200) are both provided with bosses (300). The bosses (300) are used to connect the first support body (100), the second support body (200) and the BMS component (640). The contact area between the bosses (300) and the BMS component (640) is smaller than the surface area of ​​the first support body (100) and the second support body (200).

2. A BMS support according to claim 1, characterized in that, The first support body (100) and the second support body (200) are separate structures.

3. A BMS support according to claim 1, characterized in that, The first bracket body (100) includes a wire harness fixing part (110), the wire harness fixing part (110) includes a wire harness surface (111) and a mounting surface (112), the mounting surface (112) and the wire harness surface (111) form an angled structure, the mounting surface (112) is connected to the first bracket body (100), and the mounting surface (112) is used to install wire harness fixing buckles.

4. A BMS support according to claim 3, characterized in that, The mounting surface (112) is provided with a reinforcing groove (113), which surrounds the mounting surface (112).

5. A BMS support according to claim 3, characterized in that, The edges of the wire harness surface (111) and the mounting leg (400) are each provided with a flange structure (130) for the wire harness to pass through.

6. A BMS support according to claim 1, characterized in that, The mounting leg (400) includes a connecting part (410), a wire-passing part (420), and a fixing part (430). The wire-passing part (420) is connected to the connecting part (410), and the fixing part (430) is connected to the wire-passing part (420). The connecting part (410) and the fixing part (430) are bent toward opposite sides of the wire-passing part (420), and the fixing part (430) is parallel to the fixing surface.

7. A BMS support according to claim 6, characterized in that, The connecting part (410) is connected to the first support body (100) and arranged in a gradient. A reinforcing rib (140) is provided at the connection between the connecting part (410) and the first support body (100).

8. A BMS support according to claim 3, characterized in that, The first bracket body (100) is provided with a copper busbar (500) on one side relative to the wire harness fixing part (110), and the copper busbar (500) is arranged along the length direction of the first bracket body (100).

9. A BMS support according to claim 1, characterized in that, The second support body (200) has multiple cuts (210) on its left and right sides along its own arrangement direction, and the multiple cuts (210) make the second support body (200) form a structure with continuous left and right bends.

10. A BMS support according to claim 9, characterized in that, The boss (300) is provided at the location of the continuous left and right bending structure.

11. A BMS support according to claim 9, characterized in that, The mounting leg (400) is connected at the location of the continuous left and right bends.

12. A BMS support according to claim 1, characterized in that, The second support body (200) is provided with a copper busbar (500) on each of its front and rear sides along its arrangement direction. The copper busbar (500) is arranged perpendicular to the arrangement direction of the second support body (200).

13. A battery pack, characterized in that, The device includes a housing (600), a battery module (620), a housing cover (630), a BMS component (640), and a BMS bracket as described in any one of claims 1-12. The BMS component (640) is mounted on the BMS bracket, and the BMS bracket is connected to the housing (600). The battery module (620) is disposed inside the housing (600), and the housing cover (630) is connected to the housing (600) and seals the battery module (620), the BMS bracket, and the BMS component (640).

14. A battery pack according to claim 13, characterized in that, At least two longitudinal beams (610) are provided in the housing (600), and the BMS bracket is installed on the longitudinal beams (610) by the mounting legs (400) on the left and right sides.

15. A battery pack according to claim 14, characterized in that, The box cover (630) is provided with a protrusion (631), and the BMS bracket and BMS component (640) are respectively arranged below the protrusion (631).

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