Battery pack, side plate assembly of battery pack, box body and vehicle

Abstract

The utility model provides a battery pack and a side plate assembly thereof, a box body and a vehicle, the side plate assembly of the battery pack comprises: a side plate, the side plate is used for forming a first side wall of the box body of the battery pack, the first side wall extends along the length direction of the box body, and the side plate comprises a first surface facing a battery cell; and the reinforcing piece is installed on the first surface, and the reinforcing piece extends in the length direction of the side plate so as to be used for improving the structural strength of the side plate. According to the battery pack, the reinforcing pieces are arranged on the side plates of the battery pack, so that the structural strength of the combined side plate assembly is greatly improved, and the side plate assembly is used as the first side wall of the box body, so that the technical problem that the first side wall is easily extruded by the expansion battery core and then is deformed in the related technology can be solved.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to battery packs and their side panel assemblies, housings, and vehicles. Background Technology

[0002] The main power source for electric vehicles is the battery pack. During the operation of an electric vehicle, it will encounter various complex working conditions. In order to cope with the complex working conditions and further improve the safety performance of electric vehicles, the structural strength requirements of the battery pack are also higher.

[0003] In related technologies, battery packs typically include battery cells and side plates, with multiple side plates surrounding the battery cells to protect them. Because battery cells heat up and expand after multiple charge-discharge cycles, their outer surfaces can easily press against the side plates, applying pressure and causing deformation. Ultimately, this prevents the side plates from providing adequate protection and securing the battery cells, thus posing a significant safety hazard to the battery pack. Utility Model Content

[0004] The embodiments of this utility model provide a battery pack and its side plate assembly, housing, and vehicle, which can improve the technical problem of easy deformation of the side plate of the battery pack in related technologies.

[0005] In a first aspect, embodiments of the present invention provide a side panel assembly for a battery pack, the side panel assembly comprising:

[0006] A side panel, the side panel forming a first sidewall of the housing of the battery pack, the first sidewall extending along the length of the housing, the side panel including a first surface facing the battery cell; and,

[0007] A reinforcing member is mounted on the first surface and extends along the length of the side plate to improve the structural strength of the side plate.

[0008] In one embodiment, the reinforcement is welded to the first surface.

[0009] In one embodiment, the distance between the edge of the reinforcing member and the edge of the side plate is H, where H ≥ 6 mm.

[0010] In one embodiment, the length of the reinforcing member is D, and the length of the side plate is L, where 0.7L≤D≤0.9L.

[0011] In one embodiment, the thickness of the reinforcing member is d, where 1mm ≤ d ≤ 3mm.

[0012] In one embodiment, the reinforcing member includes at least two first reinforcing members, the first reinforcing members being plate-shaped, and the at least two first reinforcing members being spaced apart from each other and arranged in parallel.

[0013] In one embodiment, the side plate includes a first plate and a second plate stacked together, the first plate being located on the side of the second plate facing the battery cell, and the side of the first plate facing the battery cell being a first surface.

[0014] In one embodiment, the side panel includes a long side extending along the length direction of the side panel, and at least one of the long side panels is provided with a flange.

[0015] In one embodiment, the reinforcing member includes at least one second reinforcing member, the second reinforcing member having weight-reducing holes.

[0016] In one embodiment, the side plate includes a main body and at least one connecting portion. One side surface of the main body in the thickness direction is the first surface, and the connecting portion is provided at least one end of the main body in the length direction. The connecting portion is bent and connected to the main body.

[0017] In one embodiment, the housing includes a second sidewall extending along the width direction of the housing, the connecting portion is provided with a connecting structure, and the connecting portion is connected to the second sidewall through the connecting structure.

[0018] Secondly, embodiments of the present invention provide a battery pack housing, including the side panel assembly described in the foregoing embodiments.

[0019] Thirdly, embodiments of this utility model provide a battery pack, comprising:

[0020] The enclosure described in the foregoing embodiments; and,

[0021] A battery cell module, at least partially disposed within the housing, the battery cell module comprising a plurality of battery cells.

[0022] Fourthly, embodiments of the present invention provide a vehicle including the battery pack described in the foregoing embodiments.

[0023] The beneficial effects of the embodiments of this utility model are as follows:

[0024] This invention significantly improves the structural strength of the assembled side panel assembly by installing reinforcing members on the side panel of the battery pack. Using the side panel assembly as the first side wall of the housing addresses the technical problem in related technologies where the first side wall is easily deformed by the pressure of expanding battery cells. Furthermore, unlike related technologies where reinforcing ribs are stamped onto the side panel, this invention eliminates the need for additional stamping dies, saving on side panel production costs. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a perspective view of the battery pack provided in an embodiment of the present invention;

[0027] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0028] Figure 3 This is an exploded view of the battery pack provided in an embodiment of this utility model;

[0029] Figure 4 This is a front view of the side panel assembly provided in an embodiment of the present invention;

[0030] Figure 5 yes Figure 4 Enlarged view of point B in the middle;

[0031] Figure 6 This is a left view of the reinforcing member provided in an embodiment of this utility model;

[0032] Figure 7 This is a perspective view of the side panel assembly provided in an embodiment of the present utility model;

[0033] Figure 8 yes Figure 7 Enlarged view of point C in the middle;

[0034] Figure 9 This is a three-dimensional schematic diagram of the side plate provided in an embodiment of this utility model;

[0035] Figure 10 This is a three-dimensional schematic diagram of the side plate provided in an embodiment of this utility model;

[0036] Figure 11 Figure 10 Enlarged view at point D;

[0037] Figure 12 This is a front view of the side panel assembly provided in an embodiment of this utility model.

[0038] The labels in the diagram are as follows:

[0039] 1. Side panel assembly;

[0040] 11. Side plate; 111. First surface; 112. Long side; 113. First plate; 114. Second plate; 115. Flanged edge; 116. Main body; 117. Connecting part; 1171. Connecting structure; 12. Reinforcing member; 121. First reinforcing member; 122. Second reinforcing member; 1221. Weight reduction hole;

[0041] 2. Battery pack;

[0042] 21. Housing; 211. First side wall; 212. Second side wall; 22. Battery cell module; 221. Battery cell;

[0043] H1, the length direction of the box;

[0044] H2, the length direction of the side panel;

[0045] H3, thickness direction of the main body;

[0046] H4, the width direction of the box. Detailed Implementation

[0047] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present utility model and are not intended to limit the present utility model. In the present utility model, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0048] According to the first aspect of this application, referring to Figures 1-4 This disclosure provides a side panel assembly 1 for a battery pack 2, comprising:

[0049] Side plate 11, side plate 11 for forming a first side wall 211 of the housing 21 of battery pack 2, the first side wall 211 extending along the length direction H1 of housing 21, side plate 11 including a first surface 111 facing the battery cell 221; and,

[0050] A reinforcing member 12 is mounted on the first surface 111 and extends along the length direction H2 of the side plate 11 to improve the structural strength of the side plate 11.

[0051] The battery pack 2 typically includes multiple battery cells 221. To secure and protect these cells, they are usually housed within the cavity of a housing 21, which is formed by multiple side walls, including a first side wall 211 extending along the length H1 of the housing 21. During repeated charging and discharging, the battery cells 221 are prone to thermal expansion, which can compress the first side wall 211, making it susceptible to deformation. Therefore, in this embodiment, a reinforcing member 12 is installed on the side plate 11 to form a side plate assembly 1 with greater structural strength as the first side wall 211. This reduces the probability of the side plate assembly 1 deforming under the pressure of the battery cells 221, thereby improving the safety performance of the battery pack 2 made using the side plate assembly 1 in this embodiment.

[0052] The side plate 11 can be made of metals such as aluminum, iron, and copper, or alloys such as steel. In this embodiment, aluminum alloy is used to make the side plate 11. Since aluminum alloy is easy to process and has high strength and rigidity, it can provide reliable mechanical support and protection for the battery pack 2. At the same time, aluminum alloy has a relatively low density. Using aluminum alloy to make the side plate 11 can effectively reduce the overall weight of the battery pack 2. For electric vehicles and other electrical equipment, this can reduce energy consumption during driving and increase the vehicle's driving range.

[0053] The reinforcing member 12 is used to strengthen the structural strength of the side plate 11, enabling the side plate 11 to withstand greater pressure from the battery cell 221 without deformation, thereby improving the service life of the battery pack 2. Specifically, the shape of the reinforcing member 12 can be selected according to design requirements. For example, in this embodiment, the side plate 11 is rectangular, so the reinforcing member 12 is set as a strip and is arranged along the length direction H2 of the side plate 11. On the one hand, this makes a portion of the side plate 11 thicker, thereby enhancing the side plate 11's ability to resist external forces such as bending, stretching, and compression; on the other hand, when the expanding battery cell 221 squeezes the side plate 11, the reinforcing member 12 preferentially bears the pressure and distributes the pressure to various parts of the side plate 11, thereby avoiding pressure concentration that could deform the side plate 11. The reinforcing member 12 can also be set as a right angle and placed at the corner of the side plate 11, thereby enhancing the structural strength of the side plate 11 at corners and edges; the reinforcing member 12 can also be set as a grid or other irregular shape, and this utility model does not limit this.

[0054] Furthermore, unlike reinforcing structures such as stamped reinforcing ribs, the connection between the reinforcing member 12 and the side plate 11 in this invention can be a non-removable fixed connection such as riveting or interference fit, or a detachable fixed connection such as bolt connection, snap-fit, or pin connection. For example, threaded holes can be made at corresponding positions on the side plate 11 and the reinforcing member 12, allowing the user to fix the side plate 11 and the reinforcing member 12 together with bolts. This provides high connection strength, simple operation, and the detachable nature makes the reinforcing member 12 and the side plate 11 easy to clean and replace, thereby improving the material reuse rate.

[0055] This invention significantly improves the structural strength of the assembled side panel assembly 1 by installing a reinforcing member 12 on the side panel 11 of the battery pack 2. Using the side panel assembly 1 as the first side wall 211 of the housing 21 addresses the technical problem in related technologies where the first side wall 211 is easily deformed by the pressure of the expanding battery cells 221. Furthermore, unlike related technologies where reinforcing ribs are stamped onto the side panel 11, this invention eliminates the need for additional stamping dies, saving on the production cost of the side panel 11.

[0056] In some embodiments, refer to Figure 4 The reinforcing member 12 is welded to the first surface 111.

[0057] Welding increases the connection strength between the reinforcing member 12 and the side plate 11, enabling it to withstand greater external forces and thus improving the service life of the manufactured battery pack 2. Furthermore, compared to bolted connections, welding eliminates the need to reserve installation space at the connection point 117 between the reinforcing member 12 and the side plate 11, resulting in a more compact structure for the battery pack 2 and consequently increasing its volumetric energy density. Preferably, this invention employs resistance welding to connect the reinforcing member 12 and the side plate 11, utilizing the resistance heat generated when current passes through the weldment. This method results in a faster welding process, a smaller heat-affected zone, and improved production efficiency and product yield for the side plate 11.

[0058] In some embodiments, refer to Figure 4 and Figure 5 The distance between the edge of the reinforcing member 12 and the edge of the side plate 11 is H, where H ≥ 6 mm.

[0059] During use, the battery pack 2 may be subjected to external forces such as vibration and impact, which can easily damage the internal battery cells 221. Therefore, it is necessary to inject expanding foam into the battery pack 2 to absorb and disperse these external forces, reduce damage to the battery cells 221, and extend their service life. The injection point of the expanding foam is selected at the edge of the battery pack 2, that is, at the edge of the side plate 11, so that the expanding foam can flow smoothly into the module. If the distance between the upper edge of the reinforcing member 12 and the upper edge of the side plate 11 is less than 6mm, the injection port of the expanding foam is easily blocked by the reinforcing member 12, preventing the expanding foam from being smoothly injected into the battery pack 2 from the edge of the side plate 11, thus affecting the normal production of the battery pack 2.

[0060] If the distance H between the lower edge of the reinforcing member 12 and the lower edge of the side plate 11 is less than 6mm, it will easily interfere with the welding of the casing 21 in the battery pack 2. During the assembly of the battery pack 2, the casing 21 is usually connected together by welding multiple plate-shaped components. If the lower edge of the reinforcing member 12 is too close to the edge of the side plate 11, it will increase the difficulty of welding, affect the welding quality, and lead to problems such as discontinuous welds, weak welds, or even missed welds, which will greatly reduce the structural strength and safety of the battery pack 2. If the casing 21 is welded first, the welding of the reinforcing member 12 will be more difficult and will easily affect the welding quality between the reinforcing member 12 and the side plate 11. As for the distance between the left and right ends of the reinforcing member 12 and the left and right ends of the side plate 11, in order to reduce the production difficulty and prevent the reinforcing member 12 from being too long due to production errors, the length of the reinforcing member 12 is usually shorter than that of the side plate 11. That is, the distance between the left edge of the reinforcing member 12 and the left edge of the side plate 11 is greater than 6mm, and the distance between the right edge of the reinforcing member 12 and the right edge of the side plate 11 is also greater than 6mm.

[0061] Therefore, in this embodiment, the distance H between the edge of the reinforcing member 12 and the edge of the side plate 11 is ≥ 6mm. For example, H is set to 7mm. This ensures that the foaming adhesive is smoothly injected into the battery pack 2 and reduces the probability that the reinforcing member 12 will affect the welding quality of the battery pack 2. This reduces the negative impact of the reinforcing member 12 during the manufacturing process of the battery pack 2 and ensures the structural strength and safety performance of the battery pack 2. H can also be 6mm, 7mm, 8mm, 9mm, 10mm, etc., and this embodiment does not limit it.

[0062] In some embodiments, refer to Figure 4 The relationship between the length D of the reinforcing member 12 and the length L of the side plate 11 is: 0.7L≤D≤0.9L.

[0063] If the length D of the reinforcing member 12 is greater than 0.9L, the reinforcing member 12 is prone to redundancy, meaning that the reinforcing member 12 is placed in areas where additional strength is not required, increasing material costs and the weight of the battery pack 2. Furthermore, due to errors, the length of the reinforcing member 12 may exceed the length of the side plate 11, making it impossible to install the reinforcing member 12 on the side plate 11, thus reducing the production efficiency and product yield of the battery pack 2. If the length D of the reinforcing member 12 is less than 0.7L, the reinforcing member 12 cannot effectively cover areas with large deformation zones, and therefore cannot provide sufficient structural strength reinforcement. This reduces the deformation resistance of the side plate 11, making it prone to deformation under the pressure of the battery cell 221, thereby reducing the safety performance and service life of the battery pack 2.

[0064] Therefore, in this embodiment, the length D of the reinforcing member 12 is set to a range of 0.7L to 0.9L. For example, D can be set to 0.8L. Since the deformation of the side plate 11 is usually in the middle part, a reinforcing member 12 with a length of 0.8L can better cover the deformation area, ensuring that the reinforcing member 12 can play a sufficient reinforcing role and avoiding the situation where the side plate 11 is easily deformed due to its short length. At the same time, the reinforcing member 12 of this length can reduce the probability of excessive redundant parts, and while meeting the anti-deformation requirements, it can reduce the material cost and weight of the reinforcing member 12 and improve the overall performance of the battery pack 2. D can also be 0.7L, 0.72L, 0.74L, 0.76L, 0.78L, 0.85L, 0.9L, etc., and this embodiment does not limit it.

[0065] In some embodiments, refer to Figure 6 The thickness of the reinforcing member 12 is d, where 1mm ≤ d ≤ 3mm.

[0066] If the thickness d of the reinforcing member 12 is less than 1 mm, the structural strength of the reinforcing member 12 itself is low, and its resistance to the compressive force from the battery cell 221 is poor, thus failing to effectively prevent the deformation of the side plate 11. If the thickness d of the reinforcing member 12 is greater than 3 mm, the distance between the reinforcing member 12 and the battery cell 221 is close. At this time, the reinforcing member 12 is prone to contact or compression with the insulation layer on the battery cell 221 under the action of external force, thereby damaging the insulation layer, reducing its insulation performance, or even causing safety accidents such as short circuits.

[0067] Therefore, in this embodiment, the thickness d of the reinforcing member 12 is set to a range of 1mm to 3mm. For example, the thickness of the reinforcing member 12 is set to 2mm, so that the reinforcing member 12 can provide sufficient strength and rigidity to prevent deformation of the side plate 11, while avoiding the risk of damaging the insulation layer of the battery cell 221 due to excessive thickness. d can also be 1.2mm, 1.4mm, 1.6mm, 1.8mm, 2.5mm, 3mm, etc., and this embodiment does not limit it.

[0068] In some embodiments, refer to Figure 4 and Figure 7 The reinforcing member 12 includes at least two first reinforcing members 12, which are plate-shaped and are spaced apart and arranged in parallel.

[0069] In this embodiment, the first reinforcing member 12 is set to a regular plate shape, which makes the first reinforcing member 12 easy to process and install. Moreover, the plate structure can provide a more effective reinforcement for the side plate 11 with a small thickness, thereby preventing the side plate assembly 1 from deforming during use.

[0070] Furthermore, compared to a single, uniform reinforcing member 12 with the same coverage area, two parallel, spaced-apart first reinforcing members 12 can distribute pressure to all parts of the side plate 11 more quickly without increasing mass, thereby improving the side plate 11's resistance to deformation. Therefore, in this embodiment, by employing at least two plate-shaped, parallel-spaced first reinforcing members 12, the structural strength of the side plate assembly 1 is improved while minimizing its mass, thus extending the service life of the battery pack 2. Simultaneously, the installation steps for the parallel-spaced first reinforcing members 12 are relatively simple, significantly improving the pressure dispersion effect and further enhancing the side plate assembly 1's resistance to deformation.

[0071] In some embodiments, refer to Figure 4 , Figure 7 and Figure 8 The side plate 11 includes a first plate 113 and a second plate 114 stacked together. The first plate 113 is located on the side of the second plate 114 facing the battery cell 221, and the side of the first plate 113 facing the battery cell 221 is the first surface 111.

[0072] There are various ways to connect the first plate 113 and the second plate 114, such as bonding, welding, bolting, and snap-fitting. Stacking the first plate 113 and the second plate 114 together improves the structural strength and deformation resistance of the side plate 11. The materials of the first plate 113 and the second plate 114 can be the same or different; this invention does not impose any restrictions. Preferably, both the first plate 113 and the second plate 114 are made of aluminum alloy, which provides high structural strength while being lightweight, thereby reducing the weight of the battery pack 2 and improving its range. The first plate 113 is closer to the battery cell 221 than the second plate 114. In this case, the first surface 111 is the side of the first plate 113 closest to the battery cell 221. The reinforcing member 12 is installed on the first plate 113 to avoid occupying space on the outer surface of the battery pack 2, preventing the battery pack 2 from being unable to be properly assembled into the electrical equipment.

[0073] In some embodiments, refer to Figures 9-11 The side panel 11 includes a long side 112 extending along the length direction H2 of the side panel 11, and at least one long side 112 is provided with a flange 115.

[0074] The flange 115 is a bent structure located at the edge of the side plate 11. Its bending direction, degree of bending, and height can be selected according to design requirements. The flange 115 can be integrally formed with the side plate 11, making the connection between the flange 115 and the side plate 11 tighter. It can also be fixedly connected to the side plate 11 by welding, bonding, or other methods. The flange 115 is located along the length H2 of the side plate 11 on its long side 112. When the side plate 11 is subjected to uneven pressure, the bent flange 115 can provide additional bending moment to resist the deformation of the side plate 11, thereby improving the bending resistance of the side plate 11. For example, during the use of the battery pack 2, the expanding cells 221 usually compress the central area of ​​the side plate 11, causing the side plate 11 to tend to bulge outwards. At this time, the bent flange 115 can effectively resist the deformation tendency of the side plate 11, allowing the side plate 11 to withstand greater loads without deformation. Preferably, the flange 115 is set as a continuous and uninterrupted strip, so that the anti-torsional deformation effect of the flange 115 is maximized.

[0075] In some embodiments, refer to Figure 9 and Figure 12 The reinforcing member 12 includes at least one second reinforcing member 12, which is provided with a weight reduction hole 1221.

[0076] By creating weight-reducing holes 1221 on the second reinforcing member 12, the second reinforcing member 12 can effectively distribute pressure while also having a smaller mass. Furthermore, the second reinforcing member 12 is now a single unit, eliminating the need for multiple fixings during installation compared to multiple first reinforcing members 12, thus simplifying the installation process. The size, position, and number of weight-reducing holes 1221 can be customized according to design requirements. For example, three U-shaped weight-reducing holes 1221 can be spaced at intervals along the length of the reinforcing member 12, dividing the reinforcing member 12 into two symmetrical upper and lower parts at the weight-reducing holes 1221. This achieves a similar anti-deformation effect in the length direction H2 of the side plate 11 as two parallel reinforcing members 12 are spaced at intervals. Moreover, the connection between the upper and lower parts of the reinforcing member 12 further enhances its anti-deformation effect in the width direction of the side plate 11, thereby further improving the stability of the side plate 11.

[0077] In some embodiments, refer to Figures 9-11 The side plate 11 includes a main body 116 and at least one connecting part 117. One side surface of the main body 116 in the thickness direction H3 is a first surface 111. At least one end of the main body 116 in the length direction is provided with a connecting part 117, and the connecting part 117 is bent and connected to the main body 116.

[0078] There are various ways to connect the connecting part 117 to the main body 116, including welding, bonding, snap-fitting, bolting, etc. The main body 116 can be connected to other structures in the battery pack 2's housing 21 through the connecting part 117, thereby improving the ease of assembly and sealing of the housing 21. At the same time, the connecting part 117 can also effectively transfer loads and prevent the side plate 11 from loosening or deforming at the connection with other structures, thereby extending the service life of the housing 21.

[0079] In some embodiments, refer to Figure 2 , Figure 10 and Figure 11 The housing 21 includes a second side wall 212 extending along the width direction H4 of the housing 21. The connecting part 117 is provided with a connecting structure 1171, and the connecting part 117 is connected to the second side wall 212 through the connecting structure 1171.

[0080] For example, the connecting structure 1171 can be a threaded hole, and the second sidewall 212 also has a threaded hole at the corresponding position, so that the connecting part 117 and the second sidewall 212 can be connected by screws; the connecting structure 1171 can also be a snap-fit ​​structure, and can be connected to the corresponding slot on the second sidewall 212; the connecting structure 1171 can also be a through hole, an adhesive layer, or other structures, and this utility model does not limit these. By setting the connecting structure 1171, the installation steps of the side panel assembly 1 are simplified, making the connection between the side panel 11 and the second sidewall 212 more convenient, thereby improving the production efficiency of the battery pack 2.

[0081] According to a second aspect of this disclosure, a housing 21 for a battery pack 2 is provided, with reference to... Figure 1 and Figure 2 The housing 21 includes the side panel assembly 1 described in the foregoing embodiments. Since the housing 21 includes the aforementioned side panel assembly 1, it possesses all the beneficial effects of the aforementioned side panel assembly 1, which will not be repeated here.

[0082] According to a third aspect of this disclosure, a battery pack 2 is provided, with reference to... Figure 1 and Figure 2 ,include:

[0083] The housing 21 in the aforementioned embodiments; and,

[0084] The battery cell module 22 is at least partially disposed within the housing 21, and the battery cell module 22 includes a plurality of battery cells 221. Since the battery pack 2 includes the aforementioned housing 21, the battery pack 2 has all the beneficial effects of the aforementioned housing 21, which will not be elaborated further here.

[0085] According to a third aspect of this disclosure, a vehicle is provided that includes the aforementioned battery pack 2, and therefore the vehicle possesses all the beneficial effects of the aforementioned battery pack 2, which will not be elaborated further here. The vehicle may be a gasoline-powered vehicle, a plug-in hybrid electric vehicle, or a new energy vehicle, etc., and this application does not specifically limit it in this regard.

[0086] The embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A side panel assembly for a battery pack, characterized in that, include: A side panel, the side panel forming a first sidewall of the housing of the battery pack, the first sidewall extending along the length of the housing, the side panel including a first surface facing the battery cell; and, A reinforcing member is mounted on the first surface and extends along the length of the side plate to improve the structural strength of the side plate.

2. The side panel assembly according to claim 1, characterized in that, The reinforcing member is welded to the first surface.

3. The side panel assembly according to claim 2, characterized in that, The distance between the edge of the reinforcing member and the edge of the side plate is H, where H ≥ 6 mm.

4. The side panel assembly according to claim 1, characterized in that, The length of the reinforcing member is D, and the length of the side plate is L, where 0.7L≤D≤0.9L.

5. The side panel assembly according to claim 1, characterized in that, The thickness of the reinforcing member is d, where 1mm ≤ d ≤ 3mm.

6. The side panel assembly according to claim 1, characterized in that, The reinforcing member includes at least two first reinforcing members, each of which is plate-shaped, and the at least two first reinforcing members are spaced apart from each other and arranged in parallel.

7. The side panel assembly according to any one of claims 1-6, characterized in that, The side plate includes a first plate and a second plate stacked together. The first plate is located on the side of the second plate facing the battery cell, and the side of the first plate facing the battery cell is the first surface.

8. The side panel assembly according to any one of claims 1-6, characterized in that, The side panel includes a long side extending along the length direction of the side panel, and at least one of the long side panels is provided with a flange.

9. The side panel assembly according to any one of claims 1-6, characterized in that, The reinforcing member includes at least one second reinforcing member, which has weight-reducing holes.

10. The side panel assembly according to any one of claims 1-6, characterized in that, The side plate includes a main body and at least one connecting part. One side surface of the main body in the thickness direction is the first surface. The connecting part is provided at least one end of the main body in the length direction. The connecting part is bent and connected to the main body.

11. The side panel assembly according to claim 10, characterized in that, The enclosure includes a second sidewall extending along the width direction of the enclosure, and the connecting part is provided with a connecting structure, and the connecting part is connected to the second sidewall through the connecting structure.

12. A battery pack housing, characterized in that, Includes the side panel assembly as described in any one of claims 1 to 11.

13. A battery pack, characterized in that, include: The housing as described in claim 12; as well as, A battery cell module, at least partially disposed within the housing, the battery cell module comprising a plurality of battery cells.

14. A vehicle, characterized in that, Includes the battery pack as described in claim 12.

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