Battery pack and electric device

Abstract

The battery pack comprises a box body and a plurality of batteries arranged in the box body, the box body comprises two oppositely arranged first side beams, the length direction of the first side beam is parallel to the arrangement direction of the plurality of batteries, and the surface of the first side beam away from the plurality of batteries is provided with a convex rib extending along the length direction of the first side beam; the battery pack further comprises a plurality of bearing frames located on the surface of the first side beam away from the plurality of batteries, and the plurality of bearing frames are connected with the first side beam and the convex rib. In this way, the convex rib can share part of the weight of the battery pack, and the connection area between the plurality of bearing frames and the first side beam is increased, so that the connection between the battery pack and the electrical equipment can be effectively improved.

Description

Technical Field

[0001] This disclosure relates to the field of battery technology, and in particular to a battery pack and an electrical device having the same. Background Technology

[0002] Battery packs, used for storing and providing electrical energy, are widely used in various devices. When battery packs are used in these devices, they need to be securely mounted. However, during use, harsh operating conditions or environments can damage the connection between the battery pack and the device, affecting the stability of the connection. Utility Model Content

[0003] In view of this, the present disclosure provides a battery pack and an electrical device having the same, which aims to at least improve the problem of unstable connection between the battery pack and the device.

[0004] On one hand, this disclosure provides a battery pack, which includes a housing and a plurality of batteries arranged in the housing. The housing includes two opposing first side beams, the length direction of which is parallel to the arrangement direction of the plurality of batteries. A protruding ridge extending along the length direction of the first side beams is provided on the surface of the first side beams opposite to the plurality of batteries. The battery pack also includes a plurality of support frames located on the surface of the first side beams opposite to the plurality of batteries, and the plurality of support frames are connected to the first side beams and the protruding ridges.

[0005] On the other hand, this disclosure also provides an electrical device that includes the battery pack described above.

[0006] According to the battery pack and electrical equipment provided in this disclosure, a protruding rib extending along the length of the first side beam is provided on the surface of the first side beam opposite to the multiple batteries; and multiple support frames are connected to the first side beam and the protruding rib. In this way, not only can the protruding rib share part of the weight of the battery pack, but it also increases the connection area between the multiple support frames and the first side beam. Even under the condition of strong vibration of the battery pack, it can effectively prevent the connection from breaking, and effectively improve the stability of the connection between the battery pack and the electrical equipment. Attached Figure Description

[0007] It should be understood that the following figures only illustrate certain embodiments of this disclosure and should not be construed as limiting the scope.

[0008] It should be understood that the same or similar reference numerals are used in the accompanying drawings to denote the same or similar elements.

[0009] It should be understood that the accompanying drawings are only schematic, and the dimensions and scales of the elements in the drawings are not necessarily precise.

[0010] Figure 1 This is a schematic diagram of the casing of an exemplary battery pack.

[0011] Figure 2 for Figure 1 The diagram shows the structure of the box from one perspective.

[0012] Figure 3 for Figure 1 The diagram shows the structure of the box from another perspective.

[0013] Figure 4 This is a schematic diagram of an exemplary first support frame.

[0014] Figure 5 for Figure 4 The diagram shows a schematic representation of the first support frame from a certain perspective.

[0015] Figure 6 for Figure 4 The diagram shows the structure of the first support frame from another perspective.

[0016] Figure 7 This is a schematic diagram of an exemplary second support frame.

[0017] Figure 8 for Figure 7 The diagram shows the structure of the second support frame from one perspective.

[0018] Explanation of reference numerals in the attached drawings: 10, enclosure; 101, electrical compartment; 102, battery compartment; 11, first side beam; 111, protruding ridge; 12, second side beam; 20, support frame; 21, first support frame; 211, first part; 212, second part; 213, groove; 214, first cavity; 215, second cavity; 216, positioning hole; 217, bolt hole; 22, second support frame; 221, first part; 222, second part; 223, groove; 224, first cavity; 225, second cavity; 226, lifting hole; 227, bolt hole; 30, grounding terminal. Detailed Implementation

[0019] Numerous specific details are set forth below to provide an understanding of the structure, function, and use of the embodiments described and illustrated in the specification and figures. It is to be understood that the embodiments described and illustrated herein are non-limiting examples, and thus it will be appreciated that the particular structural and functional details disclosed herein are representative and exemplary. Variations and changes may be made to these embodiments without departing from the scope of the claims.

[0020] In related technologies, when a battery pack is used as an energy storage device or a power supply device in equipment, it needs to be connected and fixed to the corresponding equipment to install the battery pack onto the equipment. For example, when a battery pack is used in a vehicle to provide power to the vehicle, it needs to be fixedly installed into the vehicle. Currently, the method of fixing the battery pack into the vehicle is usually to connect the side beams of the battery pack housing to a support frame, and then connect the support frame to the vehicle to fix the battery pack in the corresponding vehicle.

[0021] When connecting the side beams of the battery pack housing to the support frame, the common method is to connect the support frame to the outer surface of the side beams. This results in a plane-to-plane connection between the side beams and the support frame. In other words, the connection surface between the side beams and the support frame is a plane parallel to the direction of the battery pack's weight. When the battery pack experiences severe vibrations, this connection surface will suffer a significant impact. This is especially true for heavy vehicles such as trucks, where the battery pack's own mass, combined with the intense vibrations during vehicle operation, subjects the connection surface to even greater impact forces. This leads to a very high risk of fracture at the connection surface between the side beams and the support frame, making it difficult to guarantee the stability of the connection between the battery pack and the vehicle.

[0022] The inventors discovered that the cause of the above problems is that the connection surface between the side beam of the battery pack box and the support frame is a plane parallel to the direction of the battery pack's gravity.

[0023] To address the aforementioned problems, the inventors made numerous attempts and ultimately creatively proposed the following technical solution: A protruding rib extending along the length of the first side beam is provided on the outer surface of the first side beam of the battery pack housing; and multiple support frames are connected to the first side beam and the protruding rib. This not only allows the protruding rib to share part of the battery pack's weight but also increases the connection area between the multiple support frames and the first side beam, so the connection surface between the first side beam and the support frames is no longer just a plane parallel to the direction of the battery pack's gravity. Therefore, even under conditions of strong vibration to the battery pack, breakage at the connection point can be effectively prevented, significantly improving the stability of the connection between the battery pack and the electrical equipment.

[0024] <Example Battery Pack>

[0025] This disclosure provides a battery pack comprising a housing 10 and a plurality of batteries arranged within the housing 10. The housing 10 includes two opposing first side beams 11, the length direction of which is parallel to the arrangement direction of the batteries. A protruding rib 111 extending along the length direction of the first side beams 11 is provided on the surface of the first side beams 11 opposite to the batteries. The battery pack also includes a plurality of support frames 20 located on the surface of the first side beams 11 opposite to the batteries, and connected to the first side beams 11 and the protruding rib 111. For ease of understanding, the battery pack provided in this disclosure will be described in detail below with reference to the accompanying drawings.

[0026] See Figures 1 to 3 ,in, Figure 1 This is a schematic diagram of the structure of a battery pack housing provided in this embodiment. Figure 2 for Figure 1 A schematic diagram of the structure of the box shown in the image from one perspective; Figure 3 for Figure 1 The diagram shows the structure of the housing from another perspective. In the diagram, the X-axis can be defined, for example, as the length direction of the battery pack, which is also the length direction of the housing and the direction in which the multiple batteries are arranged; the Y-axis can be defined, for example, as the width direction of the battery pack, which is also the width direction of the housing; and the Z-axis can be defined, for example, as the height direction of the battery pack, which is also the height direction of the housing.

[0027] It should be noted that the accompanying drawings of this embodiment only show a portion of the battery pack's casing structure. For example, Figures 1 to 3 The diagram only shows the structure of the lower housing (the portion of the housing used to support the weight of multiple batteries), but this does not mean that the housing of the battery pack described in this embodiment does not include other housing structures, such as a "top cover". The battery pack described in this disclosure will be described below with reference to the structure of the lower housing shown in the figure.

[0028] like Figures 1 to 3 As shown, the battery pack includes a housing 10, which includes two opposing first side beams 11 and two opposing second side beams 12. The two first side beams 11 and the two second side beams 12 are connected in sequence to form the receiving space of the housing 10. Multiple battery banks (not shown in the figure) can be arranged sequentially along the length of the housing 10 in the receiving space of the housing 10, for example. Multiple battery cells can be combined into a battery pack, for example, by connecting them in series and / or in parallel.

[0029] The surface of the first side beam 11 facing away from the multiple batteries can be understood as the outer side surface of the first side beam 11. A protruding rib 111 extending along the length of the first side beam 11 is provided on the outer side surface of the first side beam 11. The length of the protruding rib 111 can be equal to or slightly less than the length of the first side beam 11, so that the protruding rib 111 can be as close as possible to the length of the first side beam 11 to better support the weight of the battery pack. It is understood that the protruding rib 111 extends a certain distance away from the first side beam 11 in the width direction of the battery pack to facilitate the connection of the support frame 20 to the protruding rib 111.

[0030] See also Figure 1 The battery pack also includes multiple support frames 20, which are spaced apart along the length of the first side beam 11. The multiple support frames 20 on the two first side beams 11 are symmetrical to each other, so that the two first side beams 11 can be subjected to balanced forces when the battery pack is connected to the vehicle through the support frames 20.

[0031] Each support frame 20 is connected to the first side beam 11 and the protruding rib 111. Specifically, the surface of each support frame 20 facing the first side beam 11 is connected to the outer surface of the first side beam 11 and the outer surface of the protruding rib 111, respectively. Thus, the connection surface between the support frame 20 and the first side beam 11 is no longer merely a plane parallel to the direction of the battery pack's gravity, but also includes the connection surface between the protruding rib 111 and the support frame 20. This not only increases the connection area between the support frame 20 and the first side beam 11, improving the stability of the connection between the multiple support frames 20 and the housing; but also, since the protruding rib 111 has a surface extending away from the first side beam 11 in the width direction of the battery pack—for example, it can be understood that the protruding rib 111 has upper and lower surfaces in the height direction of the battery pack—the lower surface of the protruding rib 111 can share a portion of the battery pack's weight after the support frame 20 is connected to the upper and lower surfaces of the protruding rib 111. In other words, the weight of the battery pack acts not only on the connection surface between the first side beam 11 and the support frame 20, but also on the connection surface between the lower surface of the protrusion 111 and the support frame 20. Therefore, even if the battery pack is subjected to relatively severe vibrations, the stability of the connection between the multiple support frames 20 and the first side beam 11 and the protrusion 111 can be ensured, effectively improving the problem of connection breakage and enhancing the stability of the connection between the battery pack and the vehicle.

[0032] Preferably, the protruding rib 111 and the first side beam 11 are integrally formed, which can improve the strength between the first side beam 11 and the protruding rib 111 and avoid the possibility of breakage at the connection point when the protruding rib 111 and the first side beam 11 are separate structures. At the same time, the orthogonal projection of the protruding rib 111 on the first side beam 11 is located in the central area of ​​the first side beam 11. In this way, the protruding rib 111 can more effectively support the weight of the battery pack and avoid the protruding rib 111 being set too high or too low.

[0033] In one optional embodiment, the area of ​​the surface of the first side beam 11 facing away from the plurality of batteries is S1, in mm. 2 The area of ​​the orthographic projection of the protruding ridge 111 onto the first side beam 11 is S2, in mm. 2 14.46% ≤ S2 / S1 ≤ 26.16%. The orthographic projection of the protruding ridge 111 meets this range, which ensures that the protruding ridge 111 itself has relatively high strength and can support part of the weight of the battery pack; it also controls the size of the protruding ridge 111 within a reasonable range, avoiding the protruding ridge 111 being too large, which would lead to an excessively large battery pack size and weight, and adversely affect the energy density of the battery pack.

[0034] Optionally, the ratio of S2 / S1 can be 15%, 16%, 18%, 20%, 21%, 22%, 23%, 24%, or 25%, etc. In use, the ratio of S2 / S1 can be adaptively adjusted according to factors such as the weight of the battery pack and the size of the first side beam 11, and is not limited to the ratios listed above.

[0035] Furthermore, in the height direction of the first side beam 11, each support frame 20 is arranged axially symmetrically about the protrusion 111. That is, in the height direction of the first side beam 11, the portion of each support frame 20 above the protrusion 111 and the portion below the protrusion 111 have the same shape and size. Thus, the connection area between the portion of each support frame 20 above the protrusion 111 and the portion below the protrusion 111 and the first side beam 11 is equal, resulting in the same connection strength. This allows the two parts of the support frame 20 to be subjected to balanced forces, further improving the stability of the connection between the support frame 20 and the first side beam 11.

[0036] As described above, multiple support frames 20 are arranged at intervals on the first side beam 11 along its length. As an optional implementation, such as... Figure 2 As shown, the spacing between at least some of the adjacent support frames 20 is not equal.

[0037] Specifically, such as Figure 3As shown, the housing 10 includes a battery compartment 102 and an electrical compartment 101. Multiple batteries are arranged in the battery compartment 102. The electrical compartment 101 is used to house electrical connectors such as the BMS, enabling connections between the multiple batteries and external circuits.

[0038] For example, the distance between two adjacent support frames 20 near the battery compartment 102 is d1 (mm); the distance between two adjacent support frames 20 near the electrical compartment 101 is d2 (mm); d1 < d2. That is, the distance between some adjacent support frames 20 near the battery compartment 102 can be set smaller; the distance between some adjacent support frames 20 near the electrical compartment 101 can be set larger. Thus, a denser arrangement of support frames 20 near the battery compartment 102 allows them to support greater weight; a sparser arrangement allows them to support relatively less weight. Even if the battery compartment 102 is heavier than the electrical compartment 101, the battery pack can still be evenly stressed, preventing tilting due to the greater weight of the battery compartment 102.

[0039] Preferably, the value of d1 ranges from 50mm to 200mm, and the value of d1 can be, for example, 60mm, 70mm, 80mm, 90mm, 100mm, 120mm, 160mm, or 180mm. The value of d2 ranges from 200mm to 350mm, and the value of d2 can be, for example, 220mm, 230mm, 250mm, 260mm, 280mm, 300mm, 320mm, or 340mm.

[0040] In use, the sizes of d1 and d2 can be determined comprehensively based on factors such as the length of the first side beam 11, the weight of the batteries contained in the battery compartment 102, and the size of the electrical compartment 101, as long as it ensures that the battery pack is subjected to uniform force and does not tilt. This application does not impose specific limitations on the sizes of d1 and d2.

[0041] In one optional embodiment, the length of the first side beam 11 is L1 (mm), and the length of the second side beam 12 is L2 (mm), where 2.6 ≤ L1 / L2 ≤ 3.847. When the lengths of the first side beam 11 and the second side beam 12 of the battery pack meet the above-mentioned proportional range, or when the mass of the battery pack meets the above-mentioned range, a protrusion 111 can be provided on the first side beam 11 to achieve the connection between the multiple support frames 20 and the first side beam 11. Therefore, even when the length of the first side beam 11 is large, there is a high connection strength between the multiple support frames 20, the first side beam 11, and the protrusion 111, which can effectively achieve a stable connection between the battery pack and electrical equipment such as vehicles.

[0042] like Figure 2 and Figure 3 As shown, as an optional implementation, a grounding terminal 30 can be provided on the protruding rib 111, and the grounding terminal 30 is positioned between two support frames 20 with a distance of d2 on the protruding rib 111. The grounding terminal 30 can be understood, for example, as a through hole opened on the protruding rib 111 to ground multiple batteries inside the battery pack. By placing the grounding terminal 30 on the protruding rib 111, since the protruding rib 111 has a large dimension in the width direction of the housing 10, placing the grounding terminal 30 on the protruding rib 111 will not significantly affect the strength of the housing 10. At the same time, placing the grounding terminal 30 between two support frames 20 with a distance of d2 can reduce mutual interference between the grounding terminal 30 and adjacent support frames 20, improving the convenience of operations related to the grounding terminal 30 and the support frames 20.

[0043] In one alternative embodiment, the support frame 20 includes an integrally formed first part and a second part. The first part is disposed close to the first side beam 11, and the second part is disposed away from the first side beam 11. A groove is provided on the side of the first part facing the first side beam 11, and the groove is fitted onto the protrusion 111 to realize the connection between the first part and the protrusion 111.

[0044] Furthermore, the first portion has a first surface and a second surface on the side facing the first side beam 11. The first surface is located within the groove, and the second surface is located outside the groove. The periphery of the first surface is connected to the protrusion 111, and the periphery of the second surface is connected to the outer surface of the first side beam 11. This achieves the connection between the first portion and the first side beam 11 and the protrusion 111.

[0045] It should be noted that the first and second parts mentioned above are two artificially divided parts, and they do not have strict boundaries. In use, the division of the first and second parts can be adaptively adjusted according to the structural characteristics and functions of each part of the support frame 20. The division of the first and second parts does not constitute a special limitation on this disclosure.

[0046] The following will combine Figures 4 to 8 The structure of the multiple support frames 20 is described in detail:

[0047] The multiple support frames 20 include multiple first support frames 21 and multiple second support frames 22. For example, the first support frames 21 may be provided with positioning holes 216, and the second support frames 22 may be provided with lifting holes 226. That is, the first support frames 21 can be used to fix the battery pack and also for positioning the battery pack during installation; the second support frames 22 can be used to fix the battery pack and also for lifting the battery pack during manufacturing or installation.

[0048] Multiple first support frames 21 and multiple second support frames 22 are staggered along the length of the first side beam 11. This staggered arrangement can be understood, for example, as the first support frames 21 and second support frames 22 being arranged in a regular pattern such as "ABAB" or "ABBABB"; or it can be understood as the first support frames 21 and second support frames 22 being arranged in an irregular pattern. The specific staggered arrangement of the first support frames 21 and second support frames 22 is not limited here, as long as it allows the first support frames 21 and second support frames 22 to perform their positioning and lifting functions.

[0049] See Figures 4 to 6 The relevant structural features of the first support frame 21 are shown. For example... Figure 4 As shown, the first support frame 21 includes an integrally formed first part 211 and a second part 212. The first part 211 is located close to the first side beam 11, and the second part 212 is located away from the first side beam 11. A groove 213 is provided on the side of the first part 211 facing the first side beam 11, and this groove 213 is fitted onto the protrusion 111. It can be understood that the groove 213 and the protrusion 111 are matched. That is, the shape and size of the groove 213 are the same as the shape and size of the protrusion 111, or the shape of the groove 213 is the same as the shape of the protrusion, and the size of the groove 213 is slightly larger than the size of the protrusion 111. Thus, when the groove 213 is fitted onto the protrusion 111, not only can the groove 213 and the protrusion 111 fit together, but the remaining surface of the first part 211 facing the first side beam 11 can also contact the outer surface of the first side beam 11, thereby achieving the connection between the first support frame 21 and the first side beam 11 and the protrusion 111.

[0050] Preferably, multiple support frames 20 are welded to the first side beam 11, and multiple support frames 20 are welded to the protruding rib 111.

[0051] For details, please refer to Figure 1 and Figure 4The first portion 211, facing the first side beam 11, has, for example, a first surface and a second surface. The first surface can be understood as the surface located within the groove 213, or as the inner wall of the groove 213; the second surface can be understood, for example, as the surface located outside the groove 213, that is, the surface of the first portion 211 facing the first side beam 11 excluding the groove 213. The periphery of the first surface is welded to the protrusion 111 to achieve welding between the groove 213 and the protrusion 111; the periphery of the second surface is welded to the outer surface of the first side beam 11. Thus, the first support frame 21 can achieve welding to the first side beam 11 and the protrusion 111 through its first portion 211.

[0052] There is a connecting surface parallel to the direction of battery pack gravity between the second surface and the outer surface of the first side beam 11; there is also a connecting surface between the first surface and the protrusion 111. Taking the shape of the protrusion 111 as square as an example: the groove 213 is also a U-shaped groove adapted to this square shape, and the first surface has three parts. The first part and the second part can be understood as two surfaces opposite each other inside the groove 213, and the third part can be understood as the surface adjacent to the first part and the second part. The periphery of the inner wall of the groove 213 can be welded to its corresponding first part, second part and third part respectively. After welding, the connecting surface between the first surface and the protrusion 111 will include two connecting surfaces perpendicular to the direction of battery pack gravity and one connecting surface parallel to the direction of battery pack gravity. Among them, the two connecting surfaces perpendicular to the direction of the battery pack's gravity can be understood as "added welding surfaces," which not only improve the stability of the welding between the first support frame 21 and the first side beam 11, but also at least one of the two connecting surfaces perpendicular to the direction of the battery pack's gravity can bear part of the battery pack's gravity, reducing the impact of the battery pack on the welding surface during vibration to a certain extent, and further improving the stability of the welding between the first support frame 21, the first side beam 11, and the protruding rib 111.

[0053] See Figure 4 and Figure 6 As an optional implementation, in the height direction of the first side beam 11, the height of the first portion 212 is h1 (in mm), and the height of the second portion 212 is h2 (in mm), where h1 > h2. Setting the first portion 212 to a larger height increases the welding area between the first portion 212 and the first side beam 11, thereby improving the welding strength between the first portion 212 and the first side beam 11 and ensuring the stability of the connection between the battery pack and the first support frame 21.

[0054] Preferably, the value of h1 ranges from 80mm to 104mm, and can be, for example, 85mm, 88mm, 90mm, 95mm, 98mm, 100mm, or 102mm. The value of h2 ranges from 131mm to 155mm, and can be, for example, 135mm, 138mm, 140mm, 145mm, 148mm, 150mm, or 152mm. In use, the sizes of h1 and h2 can be adjusted according to the weight of the battery pack and the dimensions of the first side beam 11, and are not limited to the values ​​listed above.

[0055] Optionally, the height of the first side beam 11 is H, in mm, with a range of 40% ≤ h1 / H ≤ 74.3%. The height H of the first side beam 11 can be understood, for example, as the distance between the top and bottom surfaces of the first side beam 11 along its height direction. The height h1 of the first part 211 can be understood, for example, as the distance between the top and bottom surfaces of the first part 211 along its height direction. The height h1 of the first part satisfying the above range ensures that the welding area between the first part 211 and the first side beam 11 is sufficiently large, thus providing sufficient welding strength. Simultaneously, it prevents the height of the first part from being excessively high, which could adversely affect the energy density of the battery pack.

[0056] The h1 / H ratio can be 52%, 55%, 58%, 60%, 62%, 63%, or 64%, etc. In use, the h1 / H ratio can be adjusted based on factors such as the battery pack's mass and size, and is not limited to the ratios listed above.

[0057] The value of H ranges from 140mm to 200mm. For example, H can be 145mm, 150mm, 155mm, 160mm, 170mm, 180mm, or 190mm. During use, the value of H can be adjusted adaptively according to the battery pack's capacity and other requirements, and is not limited to the values ​​listed above.

[0058] In one alternative embodiment, the strength of the second portion 212 is greater than that of the first portion 211. The first support frame 21 can be connected to electrical equipment such as a vehicle, for example, via the second portion 212. By setting a portion of the first portion 212 to have greater strength, the connection strength between the second portion 212 and the electrical equipment such as the vehicle can be correspondingly improved, ensuring the stability of the connection between the battery pack and the electrical equipment such as the vehicle.

[0059] For example Figure 4 and Figure 6As shown, the first part 211 and the second part 212 are made of the same material. The first part 211 can include multiple first cavities 214, which are evenly arranged along the height direction of the first side beam. The second part 212 includes a second cavity 215, which extends through the second part 212 along the length direction of the first side beam 11. This not only increases the strength of the second part 212 but also minimizes the overall weight of the first support frame 21, thus facilitating the lightweighting of the battery pack and increasing its energy density. Simultaneously, the even arrangement of the multiple first cavities 214 along the height direction of the first side beam 11 within the first part 211 ensures uniform strength at all locations, preventing weaker areas from causing failure. The shapes of the first cavities 214 and the second cavity 215 can be adaptively adjusted based on processing conditions and the shape of the first side beam 11; this application does not specifically limit the shapes of the first cavities 214 and the second cavity 215.

[0060] As shown above, the first support frame 21 is provided with positioning holes 216. Figure 5 As shown, the positioning hole 216 can, for example, be located at the center of the surface of the first support frame 21 facing away from the first side beam 11. That is, the positioning hole 216 is located on the outer surface of the second part 212 and at the center of that surface. Alternatively, the positioning hole 216 can be a circular hole. Thus, when the battery pack is fixedly installed on electrical equipment such as a vehicle, the relative positions of the multiple support frames 20 and the connectors on the vehicle or other electrical equipment can be accurately positioned by the location and shape of the positioning hole 216, thereby improving the accuracy and efficiency of the operation.

[0061] See also Figure 5 Multiple bolt holes 217 can be provided on the second part 212 of the first support frame 21, through which the first support frame 21 can be connected to electrical equipment such as vehicles. The multiple bolt holes 217 can be evenly arranged around the positioning holes 216, for example, so that the force can be evenly distributed at various positions of the first support frame 21, thereby improving the stability of the connection between the first support frame 21 and electrical equipment such as vehicles.

[0062] See Figures 7 to 8The diagram illustrates the structural features of the second support frame 22. The second support frame 22 includes an integrally formed first portion 221 and a second portion 222. The first portion 221 is disposed near the first side beam 11, and the second portion 222 is disposed away from the first side beam 11. The first portion 221 includes a plurality of first cavities 224, which are evenly arranged inside the first portion 221 along the height direction of the first side beam 11. The second portion includes a second cavity 225, which extends through the second portion 222 along the length direction of the first side beam 11. The second support frame 22 is welded to the first side beam 11 and the protrusion 111 via the first portion 221; the second support frame 22 is connected to electrical equipment such as vehicles via the second portion 222.

[0063] As described above, the second support frame 22 is provided with lifting holes 226. For example... Figure 8 As shown, the lifting hole 226 can, for example, be located in the central region of the surface of the second support frame 22 facing away from the first side beam 11. That is, the lifting hole 226 is located on the outer surface of the second part 222 and at the center of that surface. The lifting hole 226 can, for example, be configured as an approximately "convex" shaped hole, that is, the lower part of the lifting hole 226 is an elongated hole, and the upper part is an approximately semi-circular hole. In this way, the length of the lower part of the lifting hole 226 can be greater than the length of the upper part. When using a lifting structure such as a hook to lift the battery pack, the hook can enter from the lower part of the lifting hole 226; as the hook moves upward, the hook will eventually enter the upper part of the lifting hole 226. Thus, the lower part of the lifting hole 226 facilitates the entry of the hook into 226; at the same time, the upper part of the lifting hole 226 can also limit the hook during lifting, preventing the hook from shifting within the lifting hole 226 during the lifting process. Furthermore, the lifting hole 226 is connected to the second cavity 225, which can increase the depth of the lifting structure such as the hook entering the lifting hole 226 and improve the stability between the lifting hole 226 and the lifting structure such as the hook.

[0064] See also Figure 8 Multiple bolt holes 227 can also be provided on the second part 222 of the second support frame 22. The connection between the second support frame 22 and electrical equipment such as vehicles can be realized through the multiple bolt holes 227. For example, the multiple bolt holes 227 can be evenly arranged around the lifting hole 226 so that the force can be evenly distributed at various positions of the second support frame 22, thereby improving the stability of the connection between the second support frame 22 and electrical equipment such as vehicles.

[0065] The technical features of the first part 221, the second part 222, the first cavity 224 and the second cavity 225 in the second support frame 22 are similar to the corresponding technical features in the first support frame 21. Please refer to the above description of the corresponding technical features in the first support frame 21. They will not be repeated here.

[0066] <Example Electrical Equipment>

[0067] This disclosure also provides an electrical device including the battery pack described above. This electrical device can be found in numerous technical fields, such as energy storage devices, electric ships, aircraft, laptops, power tools, electric bicycles, electric motorcycles, electric vehicles, military equipment, and aerospace. Among these, electric vehicles can be, for example, passenger cars, trucks, and engineering vehicles.

[0068] It should be noted that the elements described in the above specific embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0069] It should be understood that multiple components and / or parts can be provided by a single integrated component or part. Alternatively, a single integrated component or part can be divided into multiple separate components and / or parts. The use of the public designation "a" or "an" to describe a component or part is not intended to exclude other components or parts.

[0070] It should be understood that although terms such as “first” or “second” may be used in this disclosure to describe various elements (such as the first side beam and the second side beam), these elements are not defined by these terms, which are only used to distinguish one element from another.

[0071] The basic principles of this disclosure have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this disclosure are merely examples and not limitations, and should not be considered as essential features of each embodiment of this disclosure. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the scope of this disclosure to the necessity of employing the aforementioned specific details for implementation.

[0072] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A battery pack, characterized in that, The device includes a housing (10) and a plurality of batteries arranged inside the housing (10). The housing (10) includes two opposing first side beams (11). The length direction of the first side beams (11) is parallel to the arrangement direction of the plurality of batteries. The surface of the first side beams (11) facing away from the plurality of batteries is provided with a protruding rib (111) extending along the length direction of the first side beams (11). The battery pack also includes a plurality of support frames (20) located on the surface of the first side beam (11) opposite to the plurality of batteries, and the plurality of support frames (20) are connected to the first side beam (11) and the protrusion (111).

2. The battery pack as described in claim 1, characterized in that, The protruding ridge (111) is integrally formed with the first side beam (11).

3. The battery pack as described in claim 1, characterized in that, The orthographic projection of the protruding ridge (111) onto the first side beam (11) is located in the central region of the first side beam (11).

4. The battery pack as described in claim 1, characterized in that, The area of ​​the surface of the first side beam (11) facing away from the plurality of batteries is S1, in mm. 2 The area of ​​the orthographic projection of the protruding ridge (111) onto the first side beam (11) is S2, in mm. 2 14.46% ≤ S2 / S1 ≤ 26.16%.

5. The battery pack as described in claim 4, characterized in that, The plurality of support frames (20) are arranged at intervals along the length direction of the first side beam (11).

6. The battery pack as described in claim 5, characterized in that, The spacing between at least some of the adjacent support frames (20) is not equal.

7. The battery pack as described in claim 6, characterized in that, The enclosure (10) includes an electrical compartment (101). The distance between two adjacent support frames (20) arranged away from the electrical compartment (101) is d1, in mm; the distance between two adjacent support frames (20) arranged close to the electrical compartment (101) is d2, in mm; d1 < d2.

8. The battery pack as described in claim 7, characterized in that, The protruding rib (111) is provided with a grounding terminal (30), and the grounding terminal (30) is located on the protruding rib (111) between two adjacent support frames (20) with a distance of d2.

9. The battery pack as claimed in claim 1, characterized in that, In the height direction of the first side beam (11), each of the plurality of support frames (20) is arranged axially symmetrically about the protrusion (111).

10. The battery pack as claimed in claim 9, characterized in that, The support frame (20) includes an integrally formed first part and a second part, the first part being close to the first side beam (11) and the second part being away from the first side beam (11); The first part has a groove on the side facing the first side beam (11), and the groove is fitted onto the protruding rib (111).

11. The battery pack as claimed in claim 10, characterized in that, The plurality of support frames (20) are welded to the first side beam (11), and the plurality of support frames (20) are welded to the protruding rib (111).

12. The battery pack as claimed in claim 11, characterized in that, The first part has a first surface and a second surface on the side facing the first side beam (11), the first surface being the surface located inside the groove (213), and the second surface being the surface located outside the groove (213); The periphery of the first surface is welded to the protruding ridge (111), and the periphery of the second surface is welded to the first side beam (11).

13. The battery pack as claimed in claim 10, characterized in that, In the height direction of the first side beam (11), the height of the first part is h1 in mm, and the height of the second part is h2 in mm, where h1 > h2.

14. The battery pack as claimed in claim 13, characterized in that, The height of the first side beam (11) is H, in mm, and 40% ≤ h1 / H ≤ 74.3%.

15. The battery pack as claimed in claim 10, characterized in that, The strength of the second part is greater than that of the first part.

16. The battery pack as claimed in claim 15, characterized in that, The first part includes a plurality of first cavities arranged along the height direction of the first side beam (11); the second part includes a second cavity that extends through the second part along the length direction of the first side beam (11).

17. The battery pack as claimed in claim 16, characterized in that, The plurality of support frames (20) include a plurality of first support frames (21) and a plurality of second support frames (22), which are arranged in an alternating manner; The plurality of first support frames (21) are provided with positioning holes (216), and the plurality of second support frames (22) are provided with lifting holes (226).

18. The battery pack as claimed in claim 17, characterized in that, The positioning hole (216) is located at the center of the surface of the plurality of first support frames (21) opposite to the first side beam (11), and the positioning hole (216) is a circular hole.

19. The battery pack as claimed in claim 17, characterized in that, The lifting hole (226) is located in the central region of the surface of the plurality of second support frames (22) opposite to the first side beam (11), and the lifting hole (226) is in communication with the second cavity.

20. The battery pack as claimed in claim 1, characterized in that, The box body (10) also includes two oppositely arranged second side beams (12), the two second side beams (12) are connected to the two first side beams (11) in sequence, the length of the first side beam (11) is L1 in mm, the length of the second side beam (12) is L2 in mm, and 2.6≤L1 / L2≤3.

847.

21. The battery pack as claimed in claim 7, characterized in that, The value of d1 ranges from 50mm to 200mm.

22. The battery pack as claimed in claim 7, characterized in that, The value of d2 ranges from 200mm to 350mm.

23. The battery pack as claimed in claim 13, characterized in that, The value of h1 ranges from 80 mm to 104 mm.

24. The battery pack as claimed in claim 13, characterized in that, The value of h2 ranges from 131 mm to 155 mm.

25. The battery pack as claimed in claim 14, characterized in that, The value of H ranges from 140mm to 200mm.

26. An electrical appliance, characterized in that, Includes the battery pack as described in any one of claims 1 to 25.

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