A battery pack

Abstract

This application discloses a battery pack, which includes several battery groups. The frame and base plate of the housing form a space for accommodating the battery groups. A heat exchange plate is provided at the bottom of the battery groups. The heat exchange plate includes rigid and flexible components stacked together, forming a heat exchange channel between the rigid and flexible components. Coolant is introduced into the heat exchange channel to achieve heat exchange and cooling of the battery groups. The flexible component is located on the side of the heat exchange plate closer to the base plate, and the rigid component is located on the side of the heat exchange plate away from the base plate. The elastic modulus of the base plate is greater than that of the flexible component, which improves the impact resistance of the base plate. The absolute value of the difference between the elastic modulus of the base plate and the elastic modulus of the flexible component is ΔF. The minimum distance between the base plate and the flexible component is A, where ΔF×A ranges from 35 to 2350. In this way, the base plate has a certain deformation space in the event of an impact, so as to reduce the impact deformation of the base plate on the heat exchange plate and improve the cooling effect on the battery groups.

Description

Technical Field

[0001] This application relates to the field of battery pack technology, and more specifically, to a battery pack. Background Technology

[0002] In existing technologies, the battery pack of new energy vehicles is usually located in the bottom area of ​​the vehicle, and the heat exchange components in the battery pack are usually located at the bottom of the battery pack to cool the battery pack during operation. However, during vehicle operation, foreign objects on the road often collide with the vehicle floor, which can easily cause deformation of the floor and the heat exchange plates of the heat exchange components. This can obstruct the flow of coolant within the heat exchange plates and affect the cooling effect on the battery pack.

[0003] In summary, how to reduce the impact deformation of the heat exchange plates in the battery pack and improve the cooling effect of the battery pack is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] In view of this, the purpose of this application is to provide a battery pack that reduces the impact deformation of the heat exchange plate in the battery pack and improves the cooling effect on the battery pack.

[0005] To achieve the above objectives, this application provides the following technical solution:

[0006] A battery pack includes a plurality of battery packs. The battery pack includes: a housing, the housing including a frame and a base plate, the frame and the base plate forming a receiving space for accommodating the battery packs; a heat exchange plate disposed at the bottom of the battery packs, the heat exchange plate including a rigid member and a flexible member stacked together, a heat exchange channel forming between the rigid member and the flexible member, the flexible member being located on the side of the heat exchange plate closer to the base plate, and the rigid member being located on the side of the heat exchange plate away from the base plate; the elastic modulus of the base plate is greater than the elastic modulus of the flexible member, and the absolute value of the difference between the elastic modulus of the base plate and the elastic modulus of the flexible member is ΔF; the minimum distance between the base plate and the flexible member is A, wherein ΔF×A ranges from 35 to 2350.

[0007] The battery pack provided in this application includes several battery packs, and also includes a housing. The frame and base plate of the housing form a housing space for accommodating the battery packs. A heat exchange plate is provided at the bottom of the battery packs. The heat exchange plate includes rigid and flexible components stacked together, with heat exchange channels formed between the rigid and flexible components. Coolant is introduced into the heat exchange channels to achieve heat exchange and cooling of the battery packs. The flexible components are located on the side of the heat exchange plate closer to the base plate, and the rigid components are located on the side of the heat exchange plate away from the base plate. The elastic modulus of the base plate is greater than that of the flexible components, so that the rigidity of the base plate is... The rigidity and strength of the base plate are greater than those of the flexible component, which improves the impact resistance of the base plate and reduces the deformation of the base plate during impact. The absolute value of the difference between the elastic modulus of the base plate and the elastic modulus of the flexible component is ΔF, and the minimum distance between the base plate and the flexible component is A. The range of ΔF×A is 35-2350. In this way, the base plate has a certain deformation space when it is impacted, so as to reduce the impact deformation of the base plate on the heat exchange plate, reduce the impact deformation of the heat exchange plate in the battery pack, and improve the cooling effect of the battery pack. Attached Figure Description

[0008] To more clearly illustrate the technical solutions in the embodiments of this application 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 embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0009] Figure 1 This is a schematic diagram of the overall structure of the battery pack provided in the embodiments of this application;

[0010] Figure 2 This is a schematic diagram of the battery pack disassembly structure provided in an embodiment of this application;

[0011] Figure 3 This is a schematic diagram of the structure of a cooling plate provided in an embodiment of this application;

[0012] Figure 4 for Figure 3 The image shows a front view of a cold-rolled steel plate along the horizontal X direction;

[0013] Figure 5 for Figure 3 The image shows a front view of a cold plate along the horizontal Y direction;

[0014] Figure 6 This is a schematic diagram of another cooling plate provided in an embodiment of this application;

[0015] Figure 7 for Figure 6 Another cold plate is shown as a front view along the horizontal X direction.

[0016] Explanation of reference numerals in the attached figures:

[0017] 100-battery pack;

[0018] 200 - Box body, 210 - Frame, 220 - Base plate;

[0019] 300-Heat exchange plate, 310-Rigid component, 311-Second part, 320-Flexible component, 330-Heat exchange channel;

[0020] 400 - Support component. Detailed Implementation

[0021] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. The terminology used in the following embodiments is for the purpose of describing specific embodiments only and is not intended to be a limitation of this application. As used in the specification and appended claims of this application, the singular expressions "a," "an," "the," "the," "the," and "this" are intended to also include expressions such as "one or more," unless the context clearly indicates otherwise.

[0023] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0024] The "multiple" mentioned in the embodiments of this application refers to two or more. It should be noted that in the description of the embodiments of this application, terms such as "first" and "second" are used only for the purpose of distinguishing descriptions and should not be construed as indicating or implying relative importance, nor should they be construed as indicating or implying order.

[0025] The terms "parallel" and "perpendicular" used in this application refer to "basically parallel" and "basically perpendicular" in practical operation. "Basically parallel" can be understood as parallelism with a certain degree of error, and similarly, "basically perpendicular" can be understood as perpendicularity with a certain degree of error.

[0026] like Figures 1-7 As shown in the embodiment of this application, the battery pack includes a plurality of battery packs 100. The battery pack also includes: a housing 200, which includes a frame 210 and a bottom plate 220, the frame 210 and the bottom plate 220 forming a receiving space for accommodating the battery packs 100; and a heat exchange plate 300, which is disposed at the bottom of the battery packs 100. The heat exchange plate 300 includes a rigid member 310 and a flexible member 320 stacked together, with a heat exchange channel 330 formed between the rigid member 310 and the flexible member 320, so as to achieve heat exchange and cooling of the battery packs 100 by passing coolant through the heat exchange channel 330. The flexible member 320 is located on the heat exchange plate 300 near the bottom plate 220. On one side of the 20, the rigid member 310 is located on the heat exchange plate 300 away from the base plate 220. The elastic modulus of the base plate 220 is greater than that of the flexible member 320, making the rigidity and strength of the base plate 220 greater than that of the flexible member 320. This improves the impact resistance of the base plate 220 and reduces its deformation upon impact. The absolute value of the difference between the elastic modulus of the base plate 220 and the flexible member 320 is ΔF, and the range of ΔF is 35 GPa-235 GPa. The minimum distance between the base plate 220 and the flexible member 320 is A, where ΔF × A ranges from 35 to 2350. This design allows the base plate 220 a certain deformation space in the event of an impact, reducing the impact deformation of the base plate 220 on the heat exchange plate 300, thus reducing the impact deformation of the heat exchange plate 300 in the battery pack and improving the cooling effect on the battery pack 100.

[0027] Meanwhile, by setting the range of △F×A to 35-2350, excessive spacing between the base plate 220 and the flexible component 320 is avoided. If the range of △F×A is too large, it will occupy too much space in the height of the battery pack, reducing space utilization. If the range of △F×A is too small, when the base plate 220 is deformed by impact, it is easy for the base plate 220 to interfere with the flexible heat exchange channel 330, causing the heat exchange channel 330 to deform, narrowing the flow channel available for the heat exchange medium, and reducing heat exchange efficiency. Therefore, by setting the range of △F×A to 35-2350, the space occupied by the battery pack in the height direction is reduced, the space utilization of the battery pack is improved, and the heat exchange efficiency of the battery pack 100 is ensured.

[0028] It should be noted that the purpose of the enclosure 200 is to provide installation space for the battery pack 100, the battery management system (BMS), the cooling system, electrical connection components, etc., and to fix these components inside the enclosure 200 through reasonable structural design, so as to ensure that they maintain a relatively stable position during the operation of the battery pack and avoid damage to components or loosening of connections due to vibration, impact or other factors.

[0029] The enclosure can be cast from materials such as steel plates and aluminum alloys, or lightweight materials such as glass fiber reinforced composite materials and carbon fiber reinforced composite materials.

[0030] It should be noted that the base plate 220 is the main load-bearing component of the battery pack, which usually refers to the structural component installed at the bottom of the battery pack, used to support and fix the battery pack 100, BMS, cooling system and other components inside the battery pack.

[0031] The base plate 220 can be made of various materials, such as aluminum alloy, steel, stainless steel and other high-strength materials.

[0032] It should be noted that the heat exchange plate 300 is a component for regulating battery temperature. The heat exchange plate 300 has an internal heat exchange channel 330 for circulating the heat exchange medium. The heat exchange medium can be a gas (air), a liquid (such as water, alcohol, refrigerant, oil, etc.), or a solid (such as thermally conductive adhesive, thermally conductive solder paste, etc.). The heat exchange channel 330 has an inlet and an outlet for the heat exchange medium. The heat exchange medium can enter the heat exchange channel 330 through the inlet, and after heat exchange with the battery cells, it is discharged through the outlet, thus achieving heat exchange with the battery cells.

[0033] It should be noted that the rigid component 310 is made of a material with a certain hardness and strength (such as stainless steel). In this way, the entire heat exchange plate 300 has sufficient structural strength to stably bear and support the battery, and is not easily deformed when the battery is squeezed or impacted. This allows the battery pack 100 to have higher structural strength, and the overall safety performance of the battery pack can also be improved.

[0034] The rigid component 310 can be made of various materials, including but not limited to: copper, iron, aluminum, stainless steel, aluminum alloy, etc.

[0035] It should be noted that the flexible component 320 is made of a material with good deformation and low elastic modulus, such as aluminum-plastic film. In this way, when the bottom guard plate 220 is subjected to ball impact and the deformation is recoverable, even if the deformed part of the bottom guard plate 220 is squeezed into the heat exchange channel 330 and deformed, the heat exchange channel 330 will also return to its original shape after the bottom guard plate 220 returns to its original shape, which alleviates the deformation problem of the heat exchange channel 330 to a certain extent.

[0036] However, if the deformation of the base plate 220 is severe and irreversible, and the deformed part is directly opposite the heat exchange channel 330, the heat exchange channel 330 will always be in a deformed state, the flow area will be reduced, which will also affect the heat exchange efficiency. In addition, the surface of the flexible part 320 will always be in frictional contact with the deformed part of the base plate 220, which will easily cause the flexible part 320 to wear or even be damaged, resulting in the heat exchange medium flowing out, affecting the heat exchange effect, and also creating a significant safety hazard.

[0037] It should be noted that the rigid component 310 is a flat plate, and the flexible component 320 has a groove. By hot pressing or gluing the rigid component 310 and the flexible component 320 together, a heat exchange channel 330 is formed between the rigid component 310 and the flexible component 320, so that the heat exchange medium is introduced into the heat exchange channel 330 to achieve heat exchange and cooling of the battery pack 100.

[0038] In this application, the thickness of the rigid component 310 is 0.5mm-3mm to ensure that the rigid component 310 has sufficient strength to support the battery pack 100. At the same time, if the thickness of the rigid component 310 is too large, it will occupy too much space and affect the space utilization rate. If the thickness of the rigid component 310 is too small, the structural strength of the rigid component 310 will be insufficient, and it will be prone to deformation and denting, which will reduce the distance between the heat exchange channel 330 and the base plate 220, making the heat exchange channel 330 susceptible to impact. Therefore, the thickness of the rigid component 310 is set to 0.5mm-3mm to ensure that the rigid component 310 has sufficient strength and at the same time reduce the space occupied by the rigid component 310.

[0039] In this application, the rigid component 310 can be either an aluminum plate or a steel plate. The rigid component 310 is provided with a second part 311, and there are multiple second parts 311 arranged in a row on the rigid component 310. By providing the second part 311, the overall weight of the rigid component 310 is reduced, thereby reducing the weight of the heat exchange plate 300 and improving the overall lightweight of the battery pack.

[0040] In some embodiments, such as Figures 3-5 As shown, the second part 311 is a recessed groove formed on the rigid member 310, so as to reduce the thickness of the rigid member 310 in the area where the groove is located, thereby reducing the weight of the rigid member 310.

[0041] like Figure 4 As shown, the projection of the trough on the base plate 220 does not coincide with the projection of the heat exchange channel 330 on the base plate 220 at least partially, so as to reduce the impact of opening the trough on the sealing of the heat exchange channel 330 and ensure the normal flow of coolant in the heat exchange channel 330.

[0042] In this application, the thickness of the trough is 0.1mm-1.5mm to ensure that the rigid component 310 still maintains its overall strength after the trough is opened, and at the same time, to ensure that the area of ​​the rigid component 310 after the trough is opened can still guarantee the sealing of the heat exchange channel 330.

[0043] In some other embodiments, such as Figures 6-7 As shown, the second part 311 is a through hole penetrating the rigid member 310, and the projection of the through hole on the base plate 220 does not coincide with the projection of the heat exchange channel 330 on the base plate 220, so as to avoid the impact of opening the through hole on the sealing performance of the heat exchange channel 330, and to ensure the normal flow of coolant in the heat exchange channel 330. At the same time, by opening the through hole, the weight of the rigid member 310 is further reduced, and the overall weight of the battery pack is further improved.

[0044] In this application, the thickness of the flexible component 320 is 0.05mm-0.2mm. If the flexible component 320 is too thick, it will occupy too much space and affect the space utilization rate; if the flexible component 320 is too thin, it will be easily damaged. Therefore, the thickness of the flexible component 320 is set to 0.05mm-0.2mm to ensure that the flexible component 320 has sufficient strength to support the coolant, thereby improving the cooling effect on the battery pack 100 and reducing the space occupied by the flexible component 320.

[0045] In this application, the elastic modulus of the flexible component 320 is 5GPa-15GPa, so that the flexible component 320 has a certain rigidity and strength, reducing the phenomenon of obstruction of the heat exchange channel 330 in the event of impact. If the elastic modulus of the flexible component 320 is too large, it will not be easy to recover after the heat exchange channel 330 is deformed, which will affect the flow of the heat exchange medium in the heat exchange channel 330 and thus affect the heat exchange effect. Therefore, the elastic modulus of the flexible component 320 is set to 5GPa-15GPa to further ensure the cooling effect of the battery pack 100.

[0046] In this application, such as Figure 4 and Figure 7 As shown, a receiving cavity is formed between the flexible member 320 and the base plate 220, and a heat exchange channel 330 is provided on the flexible member 320. The heat exchange channel 330 protrudes towards the side where the receiving cavity is located, so that the receiving cavity can accommodate the heat exchange channel 330. By placing the heat exchange channel 330 in the receiving cavity, the space utilization rate is improved.

[0047] like Figure 4 and Figure 7 As shown, the minimum distance between the heat exchange channel 330 and the base plate 220 is A, where A ranges from 1mm to 10mm, so that the base plate 220 has a certain deformation space, while avoiding excessive deformation space that would cause the battery pack to occupy too much space in the height direction, thereby improving the space utilization rate of the battery pack.

[0048] In this application, the thickness of the base plate 220 is 1mm-8mm to improve the rigidity of the base plate 220 and its impact resistance, while avoiding the base plate 220 being too thick so that the battery pack occupies too much space in the height direction.

[0049] In this application, the elastic modulus of the base plate 220 is 50GPa-240GPa, so that the base plate 220 has high rigidity and strength, further improving the impact resistance of the base plate 220, and further reducing the deformation of the heat exchange plate 300 by impact.

[0050] like Figure 4 , Figure 7 As shown, this application provides a support member 400 within the accommodating cavity formed by the flexible member 320 and the base plate 220. The projection of the support member 400 on the base plate 220 does not coincide with the projection of the heat exchange channel 220 on the base plate 220. This is to provide support for the base plate 220 in the event of an impact, thereby reducing the deformation of the base plate 220 and avoiding the influence of the support member 400 on the heat exchange channel 330, thus ensuring the normal flow of coolant within the heat exchange channel 330.

[0051] In some embodiments, the support member 400 is made of a rigid material, and both ends of the support member 400 along its axial direction are fixedly connected to the base plate 220 and the flexible member 320, respectively. The axial direction of the support member 400 is consistent with the projection direction of the base plate 220, so as to improve the impact resistance of the base plate 220 through the rigid support member 400 and further reduce the deformation of the flexible member 320, so as to ensure the cooling effect of the battery pack 100.

[0052] In some other embodiments, the support member 400 is made of a flexible material, and at least one end of the support member 400 along its axial direction is fixedly connected to the base plate 220 or the flexible member 320, so as to buffer the impact stress through the flexible support member 400, thereby reducing the deformation of the flexible member 320 when the base plate 220 is impacted, and ensuring the cooling effect of the battery pack 100.

[0053] In this application, the projection of the second part 311 of the rigid member 310 on the base plate 220 is at least partially non-overlapping with the projection of the support member 400 on the base plate 220, so as to reduce the impact force transmitted by the support member 400 to the second part 311 by the staggered distribution between the second part 311 and the support member 400.

[0054] It should be noted that the horizontal X direction mentioned below refers to the length direction of the battery pack 100, and the horizontal Y direction refers to the arrangement direction of the battery pack 100. Furthermore, the horizontal X direction and the horizontal Y direction are perpendicular to the thickness direction of the base plate 220.

[0055] In this application, the spacing between adjacent second parts 311 in the horizontal X direction is 8mm-50mm, so that the rigid member 310 is lightweight while ensuring that the rigid member 310 has sufficient strength to support the battery pack 100, so as to ensure the normal operation of the battery pack.

[0056] In this application, such as Figure 4 As shown, in the case of the second part 311 being a trough, the overlap distance between the trough and the heat exchange channel 330 in the horizontal X direction is 0mm-5mm, in order to reduce the impact of the thinning of the trough area on the heat exchange channel 330, so as to ensure the normal flow of coolant in the heat exchange channel 330.

[0057] In this application, such as Figure 7 As shown, when the second part 311 is a through hole, the distance between the through hole and the heat exchange channel 330 in the horizontal X direction is 3mm-10mm. This ensures that the surrounding area of ​​the heat exchange channel 330 allows for a seal between the flexible component 320 and the rigid component 310, guaranteeing the sealing effect of the heat exchange channel 330. Since the flexible component 320 and the rigid component 310 are connected by hot pressing or welding, if the distance between the through hole and the heat exchange channel 330 is too small, the connection dimension between the surrounding area of ​​the heat exchange channel 330 and the rigid component 310 will be too small, resulting in the rigid component... The connection strength between rigid component 310 and flexible component 320 is poor, which can easily lead to connection failure and cause the heat exchange medium to flow out. If the distance between the through hole and the heat exchange channel 330 is too large, the area of ​​the through hole will be reduced, thereby reducing the weight reduction effect of rigid component 310 and making the overall weight of the battery pack too large. Therefore, the distance between the through hole and the heat exchange channel 330 is set to 3mm-10mm in the horizontal X direction to ensure the weight reduction effect of rigid component 310, while ensuring the sealing and fixation between rigid component 310 and flexible component 320, and ensuring the stable flow of heat exchange medium.

[0058] In this application, at least two heat exchange channels 330 are formed between the rigid member 310 and the flexible member 320. In the horizontal X direction, the distance between adjacent heat exchange channels 330 is 15mm-50mm to improve the uniformity of heat exchange and cooling of the battery pack 100.

[0059] In this application, in order to further improve the impact resistance of the base plate 220, there are multiple support members 400, and the multiple support members 400 are distributed in sequence at intervals to improve the overall impact resistance of the base plate 220.

[0060] like Figure 5 As shown, in the horizontal Y direction, the length of the second part 311 is 20mm-200mm, so as to reduce the weight of the rigid member 310 while ensuring the supporting strength of the rigid member 310.

[0061] In this application, the distance between adjacent second parts 311 in the horizontal Y direction is 10mm-100mm, so as to reduce the weight of the rigid member 310 through the second part 311 while ensuring the supporting strength of the rigid member 310.

[0062] In this application, in the horizontal Y direction, the support member 400 extends along the extension direction of the heat exchange channel 330, and in the horizontal Y direction, the length of the support member 400 is 10mm-300mm, so as to increase the contact area between the support member 400 and the flexible member 320 and the base plate 220, so as to further improve the support effect of the support member 400.

[0063] In this application, the spacing between adjacent support members 400 in the horizontal Y direction is 80mm-300mm, so that there is an installation distance between adjacent support members 400, which facilitates the installation and fixing of the support members 400.

[0064] In this application, the battery pack 100 is located on top of the rigid member 310 so that the rigid member 310 supports the battery pack 100. Along the length direction of the battery pack 100, the ratio of the total length of all the second parts 311 that coincide with the bottom surface of the battery pack 100 to the bottom surface length of the battery pack 100 is less than 0.2-0.6, so as to ensure that the rigid member 311 has sufficient strength to support the battery pack 100.

[0065] In some embodiments, the flexible component 320 can be an aluminum-plastic film, which has high barrier properties, good cold stamping formability, puncture resistance, electrolyte stability, and electrical insulation to ensure the stable operation of the flexible component 320.

[0066] In some other embodiments, the flexible member 320 may also be a layered structure, and the flexible member 320 includes a first layer, a second layer and a third layer stacked in sequence; wherein, the first layer is close to the rigid member 310, and both the first layer and the third layer are anti-corrosion layers to improve the anti-corrosion performance of the flexible member 310, and the second layer is a metal layer to improve the stiffness of the flexible member 310.

[0067] In some embodiments, the anti-corrosion layer is one or more of a polypropylene material layer, a polyphenylene sulfide material layer, a polyphthalamide material layer, and a polyethylene material layer, in order to improve the anti-corrosion performance of the flexible component 310.

[0068] In some embodiments, the metal layer may be made of aluminum alloy, copper alloy, or titanium alloy to improve the structural strength of the flexible component 320.

[0069] In the battery pack provided by this application embodiment, when the base plate 220 is impacted, since the absolute value of the difference between the elastic modulus of the base plate 220 and the elastic modulus of the flexible member 320 is ΔF, and the minimum distance between the base plate 220 and the flexible member 320 is A, where ΔF×A ranges from 35 to 2350, the base plate 220 has a certain deformation space when impacted, so as to reduce the impact deformation of the base plate 220 on the heat exchange plate 300, reduce the impact deformation of the heat exchange plate 300 in the battery pack, and improve the cooling effect of the battery pack.

[0070] The above description of the embodiments enables those skilled in the art to make or use this application. 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 this application. Therefore, this application 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, characterized in that, The battery pack includes several battery modules, and the battery pack includes: The housing includes a frame and a base plate, the frame and the base plate forming a housing space for accommodating the battery pack; A heat exchange plate is disposed at the bottom of the battery pack. The heat exchange plate includes rigid and flexible components stacked together. A heat exchange channel is formed between the rigid and flexible components. The flexible component is located on the side of the heat exchange plate closer to the bottom plate, and the rigid component is located on the side of the heat exchange plate away from the bottom plate. The elastic modulus of the base plate is greater than that of the flexible component, and the absolute value of the difference between the elastic modulus of the base plate and the elastic modulus of the flexible component is ΔF. The minimum distance between the base plate and the flexible component is A, where ΔF×A ranges from 35 to 2350.

2. The battery pack according to claim 1, characterized in that, The thickness of the rigid component is 0.5mm-3mm.

3. The battery pack according to claim 2, characterized in that, The rigid component is either an aluminum plate or a steel plate. The rigid component is provided with a second part, and there are multiple second parts arranged in a row on the rigid component.

4. The battery pack according to claim 3, characterized in that, The second part is a recessed groove formed on the rigid member.

5. The battery pack according to claim 4, characterized in that, The projection of the settling trough on the bottom plate does not coincide at least partially with the projection of the heat exchange channel on the bottom plate.

6. The battery pack according to claim 4, characterized in that, The thickness of the settling tank is 0.1mm-1.5mm.

7. The battery pack according to claim 3, characterized in that, The second part is a through hole penetrating the rigid member, and the projection of the through hole on the base plate does not coincide with the projection of the heat exchange channel on the base plate.

8. The battery pack according to claim 3, characterized in that, The thickness of the flexible component is 0.05mm-0.2mm.

9. The battery pack according to claim 8, characterized in that, The elastic modulus of the flexible component is 5 GPa-15 GPa.

10. The battery pack according to claim 8, characterized in that, A receiving cavity is formed between the flexible component and the base plate. A heat exchange channel is provided on the flexible component, and the heat exchange channel protrudes toward the side where the receiving cavity is located.

11. The battery pack according to claim 10, characterized in that, The minimum distance between the heat exchange channel and the base plate is A, and the range of A is 1mm-10mm.

12. The battery pack according to claim 1, characterized in that, The thickness of the base plate is 1mm-8mm.

13. The battery pack according to claim 12, characterized in that, The elastic modulus of the base plate is 50 GPa-240 GPa.

14. The battery pack according to claim 10, characterized in that, A support member is provided inside the cavity, and the projection of the support member on the base plate does not coincide with the projection of the heat exchange channel on the base plate.

15. The battery pack according to claim 14, characterized in that, The projection of the second part on the rigid member onto the base plate does not at least partially overlap with the projection of the support member onto the base plate.

16. The battery pack according to claim 3, characterized in that, In the horizontal X direction, the spacing between adjacent second parts is 8mm-50mm.

17. The battery pack according to claim 3, characterized in that, The second part is a recessed groove formed on the rigid member; In the horizontal X direction, the overlap distance between the settling tank and the heat exchange channel is 0mm-5mm.

18. The battery pack according to claim 3, characterized in that, The second part is a through hole penetrating the rigid member; In the horizontal X direction, the distance between the through hole and the heat exchange channel is 3mm-10mm.

19. The battery pack according to claim 1, characterized in that, The rigid member and the flexible member form at least two heat exchange channels; In the horizontal X direction, the spacing between adjacent heat exchange channels is 15mm-50mm.

20. The battery pack according to claim 14, characterized in that, There are multiple support members, and the multiple support members are distributed sequentially at intervals.

21. The battery pack according to claim 14, characterized in that, The distance between the support member and the side beam of the frame is 15mm-50mm.

22. The battery pack according to claim 3, characterized in that, In the horizontal Y direction, the second part extends along the extension direction of the heat exchange channel.

23. The battery pack according to claim 3, characterized in that, In the horizontal Y direction, the length of the second part is 20mm-200mm.

24. The battery pack according to claim 3, characterized in that, In the horizontal Y direction, the distance between adjacent second parts is 10mm-100mm.

25. The battery pack according to claim 14, characterized in that, In the horizontal Y direction, the support extends along the extension direction of the heat exchange channel.

26. The battery pack according to claim 3, characterized in that, The battery pack is located on top of the rigid member; Along the length of the battery pack, the ratio of the total length of all the second parts that coincide with the bottom surface of the battery pack to the length of the bottom surface of the battery pack is less than 0.2-0.

6.

27. The battery pack according to claim 1, characterized in that, The flexible component has a layered structure, comprising a first layer, a second layer, and a third layer stacked sequentially. The first layer is close to the rigid component, both the first and third layers are anti-corrosion layers, and the second layer is a metal layer.

28. The battery pack according to claim 27, characterized in that, The metal layer is made of one of the following materials: aluminum alloy, copper alloy, or titanium alloy.

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