A battery module support device and battery pack

Abstract

This utility model discloses a battery module support device and a battery pack, including a first bracket and a second bracket, wherein both the first bracket and the second bracket extend along a first direction and are symmetrically arranged along a second direction. Along the second direction, the opposing sides of the first bracket and the second bracket are provided with bearing grooves, correspondingly forming placement areas for placing battery modules. The battery module includes multiple battery cells spaced apart along the first direction. The outer edge contours of the opposite sides of the first bracket and the second bracket are provided with catenary curved surfaces, which are recessed inwards towards the placement areas along the second direction. Both the first bracket and the second bracket include multiple weight-reducing through holes, which are honeycomb-shaped and spaced apart. Thus, through the honeycomb structure's hollow design and the lightweight catenary structure, overall weight reduction is achieved.

Description

Technical Field

[0001] This utility model relates to the field of electric vehicle technology, specifically to a battery module support device and a battery pack. Background Technology

[0002] GB17761-2024 (the 2024 version of the new national standard) stipulates strict regulations on the weight of the whole vehicle, and the weight of plastic parts should account for less than 5.5% of the total vehicle weight. Therefore, all vehicle manufacturers require that the battery pack use a metal casing and have strict regulations on the weight of the battery pack.

[0003] Currently, battery packs are mainly composed of battery packs, limiting brackets, and cell brackets. The limiting brackets for battery packs are mainly made of PC+ABS (polycarbonate + acrylonitrile-butadiene-styrene copolymer), PP (polypropylene) engineering plastic, and EPP (foamed polypropylene). PC+ABS has a density of 1.16 g / cm3 and high strength, but the product is heavy. PP plastic has a density of 0.92 g / cm3, but has a high shrinkage rate and unstable dimensions. EPP (foamed polypropylene) has a density of 0.025~0.092 g / cm3, but the product has low strength. Overall, it is difficult to meet the requirements of providing sufficient structural support and reducing product weight. Utility Model Content

[0004] To overcome the above-mentioned shortcomings, the purpose of this utility model is to provide a battery module support device to solve the problem mentioned in the background art of difficulty in meeting the requirements of providing sufficient structural support and reducing product weight.

[0005] To achieve the above objectives, the present invention adopts a battery module support device, comprising a first bracket and a second bracket, wherein: Both the first and second supports extend along a first direction and are symmetrically arranged along a second direction. Along the second direction, the opposing sides of both the first and second supports have bearing grooves, forming corresponding placement areas for placing battery modules. The battery module includes multiple battery cells spaced apart along the first direction. The outer edge contours of the opposite sides of the first and second supports have catenary curved surfaces, which are recessed inwards along the second direction near the placement areas. Both the first and second supports include multiple weight-reducing through holes, which are honeycomb-shaped and spaced apart.

[0006] The battery module support device provided by this utility model has a first bracket and a second bracket symmetrically arranged along a second direction. This symmetrical structure allows the battery module to be subjected to more uniform force within the placement area, effectively preventing tilting or damage to the battery module caused by uneven force. The catenary curved surface is recessed towards the placement area along the second direction. This unique curved surface design provides excellent cushioning when the battery module is subjected to external impact, dispersing the impact force, reducing direct impact on the battery module, lowering the risk of damage, and improving the safety of the device. Both the first and second brackets include multiple honeycomb-shaped, spaced weight-reducing through holes. The honeycomb structure features high strength and low weight, significantly reducing the weight of the bracket while ensuring structural strength. Thus, through the hollow design of the honeycomb structure and the lightweight structure of the catenary, the overall lightweight purpose is achieved.

[0007] In some embodiments, along a third direction, the weight reduction through-holes at the bottom layer are correspondingly provided with a plurality of the battery cells, that is, the connection points of two adjacent battery cells are provided with the weight reduction through-holes, and the outer sides of the battery cells at both ends are provided with the weight reduction through-holes.

[0008] Using the above technical solution, the weight-reducing through-holes are located at the cell's connection points and on the outside, areas where heat typically accumulates. By placing through-holes in these critical locations, airflow can be effectively increased, accelerating heat dissipation.

[0009] In some embodiments, each of the weight-reducing through-holes extends along the second direction, and the projected shape along the second direction is a regular hexagon. The spacing d between two adjacent weight-reducing through-holes is 5 mm, and the width m of the weight-reducing through-hole is: m = (wd) / (2 * sin60°), where w is the width of a single cell.

[0010] Using the above technical solution, the hexagonal arrangement of weight-reducing through holes forms a honeycomb structure. The honeycomb structure can maximize structural strength while minimizing material usage, making the bracket more stable when supporting the battery module.

[0011] In some embodiments, both the first bracket and the second bracket are made of EPP material.

[0012] Using the above technical solution, EPP (Expanded Polypropylene) is a high-performance foaming material. EPP material has a very low density, usually between 0.03-0.12 g / cm³. While maintaining structural strength, it can significantly reduce the weight of the bracket, thereby making the battery module support device even lighter overall.

[0013] In some embodiments, a pad is provided at one end of the first bracket and the second bracket along the first direction. The pad is respectively provided on the opposite side of the first bracket and the second bracket and is provided corresponding to the placement interval.

[0014] By adopting the above technical solution, the pad can provide additional support for the battery module, prevent the battery module from shifting or tilting during use, and ensure that the battery module remains stable within the placement area.

[0015] In some embodiments, the top of both the first bracket and the second bracket is provided with a positioning protrusion, and the bottom and the top of the catenary curved surface are provided with a positioning groove, and both the positioning protrusion and the positioning groove extend along the first direction.

[0016] By adopting the above technical solution, the design of the positioning protrusion and positioning groove can ensure the precise alignment of the first bracket and the second bracket during assembly, thereby reducing assembly errors, improving assembly efficiency, and ensuring the stability and consistency of the battery module within the placement area.

[0017] The adopted technical solution also includes a battery pack, comprising a battery module support device, a battery module, and a housing as described in the above embodiments. The battery module is disposed within the placement area and includes multiple battery cells spaced apart along the first direction. The housing is used to house the battery module support device and the battery module.

[0018] By adopting the above technical solution, the battery module support device and the outer shell are integrated to form a unified battery pack structure. This design improves the structural stability of the entire battery pack and reduces displacement of the support and battery module caused by vibration or external forces. The honeycomb design of the weight-reducing through holes and the optimization of the catenary curved surface ensure smooth airflow inside the battery pack, which helps to improve heat dissipation efficiency and ensures that the battery module remains within a suitable temperature range during operation.

[0019] In some embodiments, the housing includes a rectangular shell and a top cover. The rectangular shell has an opening at one end along the first direction and a receiving cavity communicating with the opening. The receiving cavity is adapted to the size of the battery module support device, and a pad in the battery module support device abuts against the bottom of the receiving cavity along the first direction. The top cover closes the opening.

[0020] By adopting the above technical solution, the dimensions of the receiving cavity and the battery module support device are matched, ensuring that the battery module support device can be tightly installed in the rectangular housing. This reduces structural instability caused by loosening or displacement, and improves the reliability of the entire battery pack. The pad is set to abut against the bottom of the receiving cavity along the first direction, providing additional support and ensuring the stability of the battery module support device within the housing. This prevents the battery module from shifting or loosening during use, and improves the overall stability of the battery pack.

[0021] In some embodiments, the inner wall of the rectangular housing is provided with a plurality of positioning protrusions, which extend along the first direction and are correspondingly provided with positioning protrusions and positioning grooves for fixing and limiting the first bracket and the second bracket.

[0022] By employing the above technical solution, the cooperation between the positioning protrusion, the positioning convex part, and the positioning groove can effectively prevent the bracket from shifting or loosening during use, ensuring precise alignment and fixation of the first and second brackets within the rectangular housing. This precise positioning reduces assembly errors, improves assembly efficiency, and ensures the stability and consistency of the battery module within the placement area. Attached Figure Description

[0023] Figure 1 A three-dimensional representation of an embodiment of this utility model Figure 1 ; Figure 2 A three-dimensional representation of an embodiment of this utility model Figure 2 ; Figure 3 This is a schematic diagram of the structure of the first support according to an embodiment of the present invention; Figure 4 for Figure 3 Enlarged view of point A in the middle; In the picture: 1. Battery module support device; 20. First bracket; 21. Second bracket; 22. Bearing groove; 23. Placement area; 24. Catenary curved surface; 25. Weight reduction through hole; 26. Pad block; 27. Positioning protrusion; 28. Positioning groove; 3. Battery module. Detailed Implementation

[0024] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0025] refer to Figures 1 to 4 , Figure 1 This invention illustrates a three-dimensional representation of a battery module support device 1 provided in an embodiment of the present invention. Figure 1 ; Figure 2This invention illustrates a three-dimensional representation of a battery module support device 1 provided in an embodiment of the present invention. Figure 2 ; Figure 3 This diagram shows a structural schematic of the first bracket 20 in a battery module support device 1 provided in an embodiment of the present invention; Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0026] like Figures 1 to 4 As shown, the technical solution provided in this application is a battery module support device 1, including a first bracket 20 and a second bracket 21, wherein both the first bracket 20 and the second bracket 21 are along a first direction ( Figure 1 Extending in the X direction (as shown in the middle), and along the second direction ( Figure 1 (As shown in the X direction) Symmetrically arranged. Along the second direction, the first bracket 20 and the second bracket 21 each have a bearing groove 22 on their opposing sides, forming a corresponding placement area 23 for placing the battery module 3. The battery module 3 includes multiple battery cells spaced apart along the first direction. The outer edge contours of the opposite sides of the first bracket 20 and the second bracket 21 have a catenary curved surface 24, which is recessed inward along the second direction near the placement area 23. Both the first bracket 20 and the second bracket 21 include multiple weight-reducing through holes 25, which are arranged in a honeycomb pattern.

[0027] The battery module support device 1 provided in this application has a first bracket 20 and a second bracket 21 symmetrically arranged along a second direction. This symmetrical structure allows the battery module 3 to be subjected to more uniform force within the placement area 23, effectively preventing the battery module 3 from tilting or being damaged due to uneven force. The catenary curved surface 24 is recessed towards the placement area 23 along the second direction. This unique curved surface design provides good cushioning when the battery module 3 is subjected to external impact, dispersing the impact force, reducing direct impact on the battery module 3, lowering the risk of damage to the battery module 3, and improving the safety of the device. Both the first bracket 20 and the second bracket 21 include multiple honeycomb-shaped, spaced weight-reducing through holes 25. The honeycomb structure has the characteristics of high strength and low weight, which can significantly reduce the weight of the bracket while ensuring the structural strength. Thus, through the hollow design of the honeycomb structure and the lightweight structure of the catenary, the overall lightweight purpose is achieved. Furthermore, the arrangement of the catenary and the weight-reducing through holes 25 facilitates the removal of the battery pack and improves assembly efficiency.

[0028] In some embodiments, reference Figures 1 to 4 Along the third direction ( Figure 1 As shown in the X direction), the weight reduction through-hole 25 at the bottom layer is correspondingly set with multiple battery cells (e.g., Figure 3(Illustrated in the dashed box), that is, the connection between two adjacent cells is provided with a weight reduction through hole 25, and the outer side of the cells at both ends is provided with a weight reduction through hole 25, and the first direction, the second direction and the third direction are perpendicular to each other.

[0029] For example, the weight-reducing through-holes 25 are located at the cell connections and on the outside, where heat typically accumulates. By placing through-holes at these critical locations, airflow can be effectively increased, accelerating heat dissipation. This design significantly improves heat dissipation efficiency, ensuring that the battery module 3 remains within a suitable temperature range during operation, extending the lifespan of the battery module 3, and allowing for observation and identification of the specific locations of multiple cells within the battery module 3.

[0030] In some embodiments, reference Figures 1 to 4 Each weight-reducing through-hole 25 extends along the second direction, and its projection shape along the second direction is a regular hexagon. The spacing d between two adjacent weight-reducing through-holes 25 is 5mm, and the width m of the weight-reducing through-hole 25 is: m = (wd) / (2*sin60°), where w is the width of a single cell.

[0031] For example, the hexagonal arrangement of the weight-reducing through-holes 25 forms a honeycomb structure. This honeycomb structure maximizes structural strength while minimizing material usage, making the support more stable when supporting the battery module 3. Simultaneously, the hexagonal array of the honeycomb structure decomposes external loads into axial pressures in multiple directions, dispersing stress through the synergistic effect between units, thus increasing weight-reduction space compared to other polygonal structures. Specifically, as... Figure 4 As shown, the width w of a single cell is set to 15.55mm, and m = (15.55-5) / (2*sin60°) = 6.09mm.

[0032] In some embodiments, the first bracket 20 and the second bracket 21 are both made of EPP material.

[0033] For example, EPP material can significantly reduce the weight of the bracket while maintaining structural strength, thereby further reducing the overall weight of the battery module support device 1. Furthermore, EPP material has excellent impact resistance, capable of absorbing a large amount of energy when subjected to external impact, thus protecting the battery module 3 from damage. This characteristic allows the EPP bracket to effectively buffer impact forces when the battery module 3 is bumped or dropped, reducing the risk of damage to the battery module 3.

[0034] In some embodiments, reference Figures 1 to 4 Each of the first support 20 and the second support 21 is provided with a pad 26 at one end along the first direction. The pad 26 is respectively provided on the opposite side of the first support 20 and the second support 21 and is provided in correspondence with the placement area 23.

[0035] For example, the pad 26 can provide additional support for the battery module 3, preventing the battery module 3 from shifting or tilting during use, and ensuring that the battery module 3 remains stable within the placement area 23.

[0036] In some embodiments, reference Figures 1 to 4 The first bracket 20 and the second bracket 21 are both provided with positioning protrusions 27 at the top and positioning grooves 28 at the bottom and the top of the catenary curved surface 24. The positioning protrusions 27 and the positioning grooves 28 both extend along the first direction.

[0037] For example, the design of the positioning protrusion 27 and the positioning groove 28 can ensure the precise alignment of the first bracket 20 and the second bracket 21 during assembly, so as to reduce assembly errors, improve assembly efficiency, and ensure the stability and consistency of the battery module 3 within the placement area 23.

[0038] In some embodiments, reference Figures 1 to 4 The provided technical solution also includes a battery pack, comprising a battery module support device 1, a battery module 3, and a housing as described in the above embodiments. The battery module 3 is disposed within the placement section 23 and includes multiple battery cells spaced apart along a first direction. The housing is used to house the battery module support device 1 and the battery module 3.

[0039] For example, the battery module support device 1 is integrated with the housing to form an integrated battery pack structure. This design improves the structural stability of the entire battery pack and reduces displacement of the support and battery module 3 due to vibration or external forces. The honeycomb design of the weight-reducing through-hole 25 and the optimization of the catenary curved surface 24 ensure smooth airflow inside the battery pack, which helps to improve heat dissipation efficiency and ensures that the battery module 3 is kept within a suitable temperature range during operation.

[0040] In some embodiments, reference Figures 1 to 4 The outer casing includes a rectangular shell and a top cover. The rectangular shell has an opening at one end along a first direction and a receiving cavity communicating with the opening. The receiving cavity is adapted to the size of the battery module support device 1, and the pad 26 in the battery module support device 1 is abutted against the bottom of the receiving cavity along the first direction. The top cover is configured to close the opening.

[0041] For example, the receiving cavity is sized to fit the battery module support device 1, ensuring that the battery module support device 1 can be tightly installed within the rectangular housing. This reduces structural instability caused by loosening or displacement, improving the overall reliability of the battery pack. The pad 26 is positioned along the first direction to abut against the bottom of the receiving cavity, providing additional support and ensuring the stability of the battery module support device 1 within the housing. This prevents the battery module 3 from shifting or loosening during use, improving the overall stability of the battery pack.

[0042] In some embodiments, reference Figures 1 to 4 The inner wall of the rectangular shell is provided with multiple positioning protrusions. The positioning protrusions extend along the first direction and are correspondingly arranged with the positioning protrusion 27 and the positioning groove 28, which are used to fix and limit the first bracket 20 and the second bracket 21.

[0043] For example, the engagement of the positioning protrusion with the positioning protrusion 27 and the positioning groove 28 can effectively prevent the bracket from shifting or loosening during use, ensuring precise alignment and fixation of the first bracket 20 and the second bracket 21 within the rectangular housing. This precise positioning can reduce assembly errors, improve assembly efficiency, and ensure the stability and consistency of the battery module 3 within the placement area 23.

[0044] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it. They cannot be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the protection scope of this utility model.

Claims

1. A battery module support device, characterized in that, Includes a first support and a second support, wherein: Both the first bracket and the second bracket extend along a first direction and are symmetrically arranged along a second direction. Along the second direction, the opposing sides of the first bracket and the second bracket are provided with bearing grooves, which correspondingly form placement areas for placing battery modules. The battery modules include multiple cells spaced apart along the first direction. The outer edge contours of the opposite sides of the first bracket and the second bracket are provided with catenary curved surfaces, which are recessed inward along the second direction near the placement area. Both the first bracket and the second bracket include multiple weight-reducing through holes, which are arranged in a honeycomb pattern.

2. The battery module support device according to claim 1, characterized in that, Along the third direction, the weight reduction through holes at the bottom layer are correspondingly provided with multiple battery cells, that is, the connection between two adjacent battery cells is provided with the weight reduction through holes, and the outer side of the battery cells at both ends is provided with the weight reduction through holes.

3. The battery module support device according to claim 2, characterized in that, Each of the weight-reducing through holes extends along the second direction, and the projection shape along the second direction is a regular hexagon; the distance d between two adjacent weight-reducing through holes is 5mm, and the width m of the weight-reducing through hole is: m=(wd) / (2*sin60°), where w is the width of a single cell.

4. The battery module support device according to claim 1, characterized in that, Both the first bracket and the second bracket are made of EPP material.

5. The battery module support device according to claim 1, characterized in that, Both the first bracket and the second bracket have pads at one end along the first direction. The pads are respectively located on the opposite sides of the first bracket and the second bracket and are corresponding to the placement area.

6. The battery module support device according to claim 5, characterized in that, The first bracket and the second bracket are provided with positioning protrusions at the top and positioning grooves at the bottom and the top of the catenary curved surface. The positioning protrusions and the positioning grooves extend along the first direction.

7. A battery pack, characterized in that, The device includes a battery module support device, a battery module, and a housing as described in any one of claims 1 to 6. The battery module is disposed within the placement area and includes a plurality of battery cells, which are spaced apart along the first direction. The housing is used to place the battery module support device and the battery module.

8. The battery pack according to claim 7, characterized in that, The outer casing includes a rectangular shell and a top cover. The rectangular shell has an opening at one end along the first direction and a receiving cavity communicating with the opening. The receiving cavity is adapted to the size of the battery module support device, and the pad in the battery module support device is abutted against the bottom of the receiving cavity along the first direction. The top cover closes the opening.

9. The battery pack according to claim 8, characterized in that, The inner wall of the rectangular housing is provided with a plurality of positioning protrusions. The positioning protrusions extend along the first direction and are correspondingly arranged with the positioning protrusions and positioning grooves, for fixing and limiting the first bracket and the second bracket.

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