Electric vehicles and battery packs

Abstract

This utility model discloses a battery pack, including a housing and a battery disposed within the housing. The housing includes a first frame extending along the length direction of the battery pack. The height of the first frame is h1 mm, and the height of the battery is h2 mm, with h1 / h2 ranging from 0.3 to 1. Along the length direction of the battery pack, the length of the first frame is L mm. Along the width direction of the battery pack, the distance between the first frame and the battery is d mm, with L / d ranging from 7 to 60. This utility model's battery pack improves the buffering capacity of the battery pack when subjected to collisions, reduces the probability of battery deformation when the battery pack is subjected to external force, and ensures the energy density of the battery pack. This utility model also discloses an electric vehicle.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to an electric vehicle and battery pack. Background Technology

[0002] Battery packs, as energy storage devices, are being used more and more widely in daily life and industry.

[0003] The battery pack includes a housing and batteries housed within the housing, with the housing protecting the batteries. The housing includes a base plate and a frame connected together. During use, the frame of the housing is susceptible to impact deformation, which can compress the batteries, causing short circuits and other problems, ultimately leading to battery failure. Utility Model Content

[0004] In view of this, the present invention provides a battery pack that improves the buffering capacity of the battery pack when it is subjected to a collision, reduces the probability of the battery deforming when the battery pack is subjected to an external force collision, and ensures the energy density of the battery pack.

[0005] This utility model also provides an electric vehicle.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A battery pack includes a housing and a battery disposed within the housing. The housing includes a first frame extending along the length direction of the battery pack. The height of the first frame is h1 mm, and the height of the battery is h2 mm. The ratio of h1 / h2 is in the range of 0.3-1. Along the length direction of the battery pack, the length of the first frame is L mm. Along the width direction of the battery pack, the distance between the first frame and the battery is d mm. The ratio of L / d is in the range of 7-60.

[0008] As can be seen from the above technical solution, the battery pack provided by this utility model, by limiting the range of the ratio of the height of the first frame to the height of the battery, and simultaneously limiting the range of the ratio of the length of the first frame to the distance between the first frame and the battery, makes the buffering effect good when the first frame is deformed by collision, and the buffering space between the first frame and the battery appropriate. This reduces the probability of the battery deforming when the battery pack is impacted by external force, reduces the possibility of battery failure due to collision, improves the energy density and space utilization of the battery pack, and is conducive to the lightweighting of the battery pack.

[0009] This utility model also provides an electric vehicle, including a battery pack, wherein the battery pack is the aforementioned battery pack.

[0010] The electric vehicle of this utility model includes the aforementioned battery pack, and therefore has the advantages of the aforementioned battery pack, which will not be repeated here. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are 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.

[0012] Figure 1 A schematic diagram of the structure of the housing and battery after installation at one angle according to an embodiment of the present invention;

[0013] Figure 2 for Figure 1 A schematic diagram of the casing and battery installation from another angle provided in the embodiment;

[0014] Figure 3 for Figure 2 A schematic diagram of the cross-sectional structure at position AA in the middle;

[0015] Figure 4 for Figure 2 A cross-sectional view of the BB position;

[0016] Figure 5 for Figure 1 A schematic diagram of the structure of the casing and battery after installation at another angle, provided in the embodiment;

[0017] Figure 6 for Figure 4 A partially enlarged structural diagram of the location of the reinforcing member;

[0018] Figure 7 A structural schematic diagram of the housing and battery after installation at one angle, according to another embodiment of the present invention;

[0019] Figure 8 This is a schematic diagram of the structure of the box provided in one embodiment of the present utility model;

[0020] Figure 9 This is a schematic diagram of the structure of the box provided in another embodiment of the present utility model.

[0021] in:

[0022] 1. Box body,

[0023] 101. First frame; 102. Reinforcing member; 103. Second reinforcing beam; 104. Separating beam; 105. Second frame; 106. First reinforcing beam; 107. Electrical cavity; 108. Base plate; 109. Battery cavity.

[0024] 2. Battery. Detailed Implementation

[0025] This utility model discloses a battery pack that improves the buffering capacity of the battery pack when it is subjected to a collision, reduces the probability of the battery deforming when the battery pack is subjected to an external force collision, and ensures the energy density of the battery pack.

[0026] This utility model also provides an electric vehicle.

[0027] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] A battery pack includes a battery assembly, a battery management system (BMS), a thermal management system, an electrical connection system (high-voltage / low-voltage connectors, wiring harnesses, etc.), structural components, and protective parts. These components are housed within a casing and sealed with a cover, forming a complete functional unit capable of directly outputting electrical energy. The battery assembly is composed of multiple individual cells connected in series and / or parallel.

[0029] The battery pack casing is a closed or semi-closed structure made of materials such as metal and plastic. It serves as the physical carrier of the battery pack, and its design and manufacturing must meet the safety, reliability, and functionality requirements of the battery pack in different usage scenarios. The casing includes a base plate and a frame connected to the base plate. The frame is the frame structure of the casing, providing support, protection, and connection. The frame can be formed by splicing multiple beams together. The frame typically includes four sub-frames, which are joined end-to-end to form an enclosed space. This enclosed space is sealed by a cover plate and a base plate to form a cavity for housing the batteries. The frame can be made of various materials, such as aluminum alloy, copper alloy, steel, and plastic. The frame can be rectangular, circular, polygonal, etc., with no specific limitation. The interior of the frame can be a solid structure or contain cavities.

[0030] A battery can store chemical energy and controllably convert it into electrical energy. In recyclable batteries, the active materials can be reactivated by charging after discharge, allowing for continued use. A battery consists of a casing and battery cells housed within the casing.

[0031] See Figures 1 to 9The battery pack of this utility model includes a housing 1 and a battery 2 disposed within the housing 1. The housing 1 includes a first frame 101 extending along the length direction of the battery pack. The height of the first frame 101 is h1 mm, and the height of the battery 2 is h2 mm, with h1 / h2 ranging from 0.3 to 1. Along the length direction of the battery pack (X-direction), the length of the first frame 101 is L mm. Along the width direction of the battery pack (Y-direction), the distance between the first frame 101 and the battery 2 is d mm, with L / d ranging from 7 to 60. The length direction of the battery pack corresponds to the vehicle's driving direction. The housing 1 includes a base plate 108 and a frame structure connected to the upper surface of the base plate 108. The frame structure includes the first frame 101. The base plate 108 supports the battery 2 and the frame structure. The frame structure and the base plate 108 enclose a battery cavity 109 for placing the battery 2 and an electrical cavity 107 for placing the electrical system. The battery 2 is fixedly placed within the battery cavity 109. The battery cavity 109 and the electrical cavity 107 are separated by a partition beam 104. The two ends of the partition beam 104 are respectively connected to the two first frame frames 101.

[0032] The space formed by the distance between the first frame 101 and the battery 2 serves as a buffer space when the housing 1 is impacted. If the value of h1 / h2 is too small, the buffering effect of the first frame 101 is poor when it deforms upon impact, and the battery 2 is prone to deformation upon impact. If the value of h1 / h2 is too large, the energy density of the battery pack is low, which is not conducive to the lightweight design of the battery pack. If the value of L / d is too large, the strength of the first frame 101 is poor, the buffer space between the first frame 101 and the battery 2 is small, the first frame 101 is prone to deformation upon impact, and the deformation of the first frame 101 can easily affect the battery 2, causing the battery 2 to fail. If the value of L / d is too small, although it can improve the strength of the first frame 101 and reduce the probability of battery failure due to collision deformation of the battery 2, the space utilization of the battery pack is low and the energy density is low. The value of h1 / h2 can be any value from 0.3, 0.5, 0.7, 0.8, 0.9, 1, etc., or a value between any two values. The value of L / d can be any one of 7, 15, 30, 40, 50, 60, etc., or a value between any two values.

[0033] The battery pack of this utility model limits the range of the ratio of the height of the first frame 101 to the height of the battery 2, and simultaneously limits the range of the ratio of the length L of the first frame 101 to the distance d between the first frame 101 and the battery 2. This results in a good buffering effect when the first frame 101 is deformed by a collision, and an appropriate buffering space between the first frame 101 and the battery 2. This reduces the probability of the battery 2 deforming when the battery pack is impacted by external forces, reduces the possibility of the battery 2 failing due to a collision, improves the energy density and space utilization of the battery pack, and avoids the battery pack becoming too heavy.

[0034] Specifically, h1 ranges from 50 to 160, h2 ranges from 60 to 200, L ranges from 1300 to 2400, and d ranges from 38 to 200.

[0035] To further improve the safety performance of battery 2 when the battery pack is subjected to impact, the battery pack of this utility model also includes a first reinforcing beam 106. The first reinforcing beam 106 is disposed between the first frame 101 and the battery 2, so that when the first frame 101 is deformed by impact, it will not directly impact or contact the battery 2, thus further protecting the battery 2. The bottom of the first reinforcing beam 106 is in contact with or welded to the base plate 108. The first reinforcing beam 106 can be a solid plate or a hollow plate; there is no limitation here, and different plates are selected according to different applications.

[0036] To improve the structural compactness of the battery arrangement, the first reinforcing beam 106 is arranged parallel to the first frame 101, with a distance of emm between the first reinforcing beam 106 and the first frame 101, and a distance of fmm between the first reinforcing beam 106 and the battery 2. Figure 7 As shown, e > f. By limiting the distance e between the first reinforcing beam 106 and the first frame 101, the distance between the first reinforcing beam 106 and the first frame 101 is kept within a suitable range, preventing the first reinforcing beam 106 and the first frame 101 from deforming simultaneously upon impact, thus improving the buffering capacity. The distance f between the first reinforcing beam 106 and the battery 2 can be 0 or greater than 0. When the distance f between the first reinforcing beam 106 and the battery 2 is 0, as shown... Figure 1 and Figure 2 As shown, the side of battery 2 is in direct contact with the first reinforcing beam 106; otherwise, a gap is set between them, such as... Figure 7 As shown. Further, the distance e between the first reinforcing beam 106 and the first frame 101 ranges from 20 to 120, and the distance f ranges from 3 to 50. Specifically, the value of e can be any value from 20, 50, 80, 100, 120, or any value between any two values. The value of f can be any value from 3, 15, 25, 50, or any value between any two values.

[0037] In one embodiment, f is greater than 0, resulting in gaps between the first reinforcing beam 106 and the first frame 101, and between the first reinforcing beam 106 and the battery 2, thus providing a two-stage buffering effect for the battery pack. In another embodiment, the first reinforcing beam 106 abuts against the battery 2. Although this structure provides a poorer buffering effect, the first reinforcing beam 106 can limit the position of the battery 2, improving the structural stability of the battery 2 within the battery pack.

[0038] The thickness of the first frame 101 is b mm, where b ranges from 15 to 40 mm, preferably from 22 to 30 mm. By limiting the thickness b of the first frame 101, both buffering capacity and energy density of the battery pack are ensured. If the thickness b of the first frame 101 is too large, although its strength is better and it can improve the buffering capacity during a collision, it will affect the energy density of the battery pack. If the thickness b of the first frame 101 is too small, although it is beneficial for battery weight reduction and improving the energy density of the battery pack, its strength is low and its impact resistance is poor.

[0039] In one embodiment, the distance between the first reinforcing beam 106 and the battery 2 is f mm, and the range of f / d is 0.1-0.7. Setting f / d within this range ensures both the width of the buffer space between the first reinforcing beam 106 and the battery 2, and the width of the buffer space between the first frame 101 and the battery 2, thus improving the battery pack's impact resistance while avoiding excessive impact on the battery pack's energy density. If the value of f / d is too large, although it can improve the buffering capacity of the buffer space between the first reinforcing beam 106 and the battery 2, the width of the buffer space between the first frame 101 and the battery 2 will be too small, resulting in poor buffering capacity; if the value of f / d is too small, the width of the buffer space between the first frame 101 and the battery 2 will be too large, which is detrimental to ensuring the battery pack's energy density. Specifically, the width of the buffer space between the first frame 101 and the battery 2 is d mm, and the width of the buffer space between the first reinforcing beam 106 and the battery 2 is f mm.

[0040] To improve cushioning strength, at least one reinforcing member 102 is provided between the first reinforcing beam 106 and the first frame 101. One end of the reinforcing member 102 is connected to the first frame 101, and the other end is connected to the first reinforcing beam 106. The bottom end of the reinforcing member 102 can contact the base plate 108 or be spaced apart from the base plate 108. Figure 4 and Figure 6 The image shows the bottom end of the reinforcing member 102 in contact with the base plate 108. When the bottom end of the reinforcing member 102 is in contact with the base plate 108, the cushioning capability is better. The bottom end of the reinforcing member 102 can be welded to the base plate 108.

[0041] Furthermore, one or more reinforcing members 102 can be provided. The sum of the dimensions of all reinforcing members 102 on one side along the length of the battery pack is a mm, a / L ranges from 0.05 to 0.4, and a ranges from 100 to 500. Specifically, the value of a / L can be any value among 0.05, 0.1, 0.2, 0.4, etc., or a value between any two values, and the value of a can be any value among 100, 200, 300, 400, 500, etc., or a value between any two values. All reinforcing members 102 on one side refers to the reinforcing members 102 connected to a first frame 101. The dimension of one reinforcing member 102 along the length of the battery pack is a1 mm, such as... Figure 7 As shown, n reinforcing members 102 are connected to the first frame 101 on one side, where n is a number greater than or equal to 1, and a = n × a1. When the number of reinforcing members 102 is greater than 1, the multiple reinforcing members 102 are evenly arranged between the first reinforcing beam 106 and the first frame 101. The range of a / L is set within the above range to ensure the buffer strength of the battery pack while avoiding excessive weight. If the value of a / L is too large, the weight of the battery pack will be too large, which is not conducive to the lightweighting of the battery; if the value is too small, the impact resistance will be poor, and the buffer strength of the battery pack will be poor. In this embodiment, the range of L / d is 10-60.

[0042] In one specific embodiment, the first reinforcing beam 106 has at least one reinforcing member 102 at its center along the length of the battery pack, thereby supporting the most deformable center position of the first frame 101 and improving the buffering capacity of the first frame 101. In this embodiment, it is required that the number of reinforcing members 102 connected to one side of the first frame 101 is odd, such as... Figure 7 As shown, there are 9 reinforcing members 102 connected to the first frame 101 on one side.

[0043] Furthermore, multiple reinforcing members 102 are provided, and the multiple reinforcing members 102 are symmetrically arranged about the center position of the first reinforcing beam 106 along the length direction of the battery pack, so that the deformation resistance of the first frame 101 and the first reinforcing beam 106 about the center symmetrical position is similar.

[0044] In one embodiment of this utility model, in order to improve the buffering capacity of the first frame 101 along the width direction of the battery pack, the reinforcing member 102 is arranged parallel to the width direction of the battery pack, such as... Figure 7 and Figure 8 As shown. In another embodiment, the angle between the direction of the reinforcing member 102 and the length direction of the battery pack is an acute angle, such as... Figure 9As shown, this improves the buffering capacity of the first frame 101 along the width and length directions of the battery pack. Furthermore, the adjacent reinforcing members 102 are positioned opposite each other, thereby further improving the structural strength of the battery pack.

[0045] The angle between the direction of the reinforcing member 102 and the length direction of the battery pack ranges from 30° to 80°. Setting the angle between the direction of the reinforcing member 102 and the length direction of the battery pack within this range ensures the impact resistance of the first frame 101 along both the width and length directions of the battery pack. If the angle is too small, the impact resistance of the first frame 101 along the width direction of the battery pack is poor; if the angle is too large, the impact resistance of the first frame 101 along the length direction of the battery pack is inadequate.

[0046] To further improve the structural strength of the first frame 101, the battery pack of this utility model also includes a second reinforcing beam 103. The second reinforcing beam 103 is disposed on the surface of the first frame 101 away from the battery 2, and the second reinforcing beam 103 extends along the length direction of the battery pack.

[0047] To protect the battery 2 inside the battery pack, the height h1 of the first frame 101 is greater than the height h2 of the battery 2. To ensure the energy density of the battery pack, the difference between h1 and h2 cannot be too large. Therefore, the difference needs to be limited. Specifically, the range of h1-h2 is 0.1-70. If the value of h1-h2 is too large, it will affect the energy density of the battery pack; if the value is too small, it will be difficult to ensure the safety of the battery 2 inside the battery pack.

[0048] To avoid interference from the first reinforcing beam 106 with the busbar and wiring harness components above the battery 2, the height h3 of the first reinforcing beam 106 needs to be limited. h3 is in mm, and the height h3 of the first reinforcing beam 106 needs to be less than the height h2 of the battery 2. The height h3 of the first reinforcing beam 106 refers to the distance between the surface of the first reinforcing beam 106 away from the base plate 108 and the base plate 108. If h3 is too small, it will affect the impact resistance of the first reinforcing beam 106; if h3 is too large, it will affect the placement of components such as the busbar above the battery 2.

[0049] Furthermore, the range of h3 / h2 is 0.7-1, specifically taking any value from 0.7, 0.8, 0.9, 1, or any two values ​​in between. Specifically, h3 ranges from 55-180. A h3 / h2 value within this range not only prevents the first reinforcing beam 106 from affecting the installation of components above the battery 2, but also ensures the first reinforcing beam 106's resistance to collision deformation. Preferably, the height of the first reinforcing beam 106 is the same as the height of the reinforcing member 102, both being h3. If the h3 / h2 value is too small, the strength of the first reinforcing beam 106 is low, resulting in poor buffering effect; if the value is too large, it interferes with other components.

[0050] In one embodiment, the larger surfaces of the battery 2 are positioned close to the first frame 101. The larger surfaces of the battery 2 refer to the two opposite surfaces with the largest area on the side of the battery 2. Because the larger surfaces of the battery 2 have a larger area, the larger surfaces close to the first frame 101 have lower strength and are more prone to deformation upon impact. In this case, the range of L / d is 7-55.

[0051] In another embodiment, the non-large surface side of the battery 2 is disposed close to the first frame 101. Since the non-large surface area of ​​the battery 2 is small, the surface close to the first frame 101 has greater strength and is less prone to deformation when subjected to impact.

[0052] To form a closed frame structure housing 1 for accommodating the battery 2, the housing 1 further includes a second side frame 105 extending along the width direction of the battery pack. Two second side frames 105 are provided, with the ends of the first side frame 101 respectively connected to the two second side frames 105. The housing 1 also includes a partition beam 104, the ends of which are connected to the first side frame 101. Specifically, the partition beam 104 is arranged parallel to the second side frame 105. One end of a first reinforcing beam 106 is connected to the second side frame 105, and the other end is connected to the partition beam 104. The first reinforcing beam 106 is welded to the second side frame 105 and the partition beam 104.

[0053] To ensure the cushioning performance of the second frame 105 of the battery pack, the distance between the second frame 105 and the battery 2 is cmm, such as... Figure 7 As shown, the range of c is 2-100. By limiting the range of the distance c between the second frame 105 and the battery 2, the distance between the second frame 105 and the battery 2 is kept within a suitable range. This prevents the deformation of the second frame 105 from directly affecting the battery 2 when it is subjected to collision deformation, thereby improving the battery pack's anti-collision buffering capability and ensuring that the energy density of the battery pack is within a suitable range. If the value of c is too large, it will affect the energy density of the battery pack; if the value is too small, the buffering capability at the position of the second frame 105 will be poor.

[0054] To ensure the strength of the first reinforcing beam 106, its thickness is g mm, where g ranges from 10 to 40 mm, preferably 15 to 30 mm. By limiting the thickness g of the first reinforcing beam 106, it is possible to ensure both sufficient strength to guarantee buffering capacity and the energy density of the battery pack. If the thickness g of the first reinforcing beam 106 is too large, although its strength is better and it can improve the buffering capacity during a collision, it will affect the energy density of the battery pack; if the thickness g of the first reinforcing beam 106 is too small, although it is beneficial for battery weight reduction and improving the energy density of the battery pack, its strength is low and its impact resistance is poor.

[0055] The battery pack of this invention is less prone to deformation when subjected to impact during use, greatly reducing the probability of battery failure due to deformation and extending its service life.

[0056] This utility model also provides an electric vehicle, including a battery pack, which is the battery pack described above, and therefore has the advantages of the battery pack described above, which will not be repeated here.

[0057] In the description of this solution, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this solution, "multiple" means two or more, unless otherwise explicitly specified.

[0058] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0059] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A battery pack, comprising a housing and a battery disposed within the housing, characterized in that, The housing includes a first frame extending along the length of the battery pack. The height of the first frame is h1 mm, the height of the battery is h2 mm, and the range of h1 / h2 is 0.3-1. Along the length of the battery pack, the length of the first frame is L mm. Along the width of the battery pack, the distance between the first frame and the battery is d mm, and the range of L / d is 7-60.

2. The battery pack according to claim 1, characterized in that, It also includes a first reinforcing beam, which is disposed between the first frame and the battery.

3. The battery pack according to claim 2, characterized in that, The housing also includes a second frame extending along the width direction of the battery pack, with the end of the first frame connected to the second frame; The box also includes a partition beam, one end of which is connected to the first frame, and one end of the first reinforcing beam is connected to the second frame, and the other end is connected to the partition beam.

4. The battery pack according to claim 2, characterized in that, The first reinforcing beam is arranged parallel to the first frame, the distance between the first reinforcing beam and the first frame is e mm, and the distance between the first reinforcing beam and the battery is f mm, where e > f.

5. The battery pack according to claim 4, characterized in that, The range of e is 20-120, and the range of f is 3-50.

6. The battery pack according to claim 2, characterized in that, The distance between the first reinforcing beam and the battery is f mm, and the range of f / d is 0.1-0.

7.

7. The battery pack according to claim 2, characterized in that, The first reinforcing beam abuts against the battery.

8. The battery pack according to claim 2, characterized in that, At least one reinforcing member is provided between the first reinforcing beam and the first frame; One end of the reinforcing member is connected to the first frame, and the other end is connected to the first reinforcing beam.

9. The battery pack according to claim 8, characterized in that, The sum of the dimensions of all the reinforcing members on one side along the length of the battery pack is a mm, and the a / L ranges from 0.05 to 0.

4.

10. The battery pack according to claim 9, characterized in that, The range of L / d is 10-60.

11. The battery pack according to claim 8, characterized in that, The first reinforcing beam has at least one reinforcing member at its center along the length direction of the battery pack.

12. The battery pack according to any one of claims 8-11, characterized in that, The reinforcing members are provided in multiple ways, and the multiple reinforcing members are symmetrically arranged about the center position of the first reinforcing beam along the length direction of the battery pack.

13. The battery pack according to claim 8, characterized in that, The reinforcing member is arranged parallel to the width direction of the battery pack.

14. The battery pack according to claim 8, characterized in that, The angle between the direction in which the reinforcing member is positioned and the length direction of the battery pack is an acute angle.

15. The battery pack according to claim 14, characterized in that, The acute angle is in the range of 30-80°.

16. The battery pack according to claim 1, characterized in that, It also includes a second reinforcing beam, which is disposed on the surface of the first frame away from the battery; The second reinforcing beam extends along the length of the battery pack.

17. The battery pack according to claim 1, characterized in that, The range of h1-h2 is 0.1-70.

18. The battery pack according to claim 2, characterized in that, The height of the first reinforcing beam is h3mm, where h3 < h2.

19. The battery pack according to claim 18, characterized in that, The range of h3 / h2 is 0.7-1.

20. The battery pack according to claim 1, characterized in that, The battery is positioned close to the first frame on its larger side, and the L / d range is 7-55.

21. The battery pack according to claim 1, characterized in that, The non-large side of the battery is positioned close to the first frame.

22. The battery pack according to claim 3, characterized in that, The distance between the second frame and the battery is c mm, where c ranges from 2 to 100.

23. The battery pack according to claim 2, characterized in that, The thickness of the first reinforcing beam is g mm, where g ranges from 10 to 40.

24. The battery pack according to claim 1, characterized in that, The thickness of the first frame is b mm, where b ranges from 15 to 40 mm.

25. The battery pack according to claim 1, characterized in that, The range of h1 is 50-160, the range of h2 is 60-200, the range of L is 1300-2400, and the range of d is 38-200.

26. An electric vehicle, comprising a battery pack, characterized in that, The battery pack is the battery pack according to any one of claims 1-25.

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