Battery pack and electric equipment

Abstract

The utility model relates to the technical field of electric vehicle batteries, and discloses a battery pack and electric equipment, the battery pack comprises a frame structure, the frame structure is provided with an accommodating cavity, the frame structure is provided with an anti-explosion valve, a battery module and a transition plate are arranged in the accommodating cavity, the transition plate is provided with a vent hole along a third direction, and the transition plate is arranged on one side of the battery module; the bottom plate is arranged on one side of the frame structure, and the bottom plate and the transition plate are arranged at intervals; the two sides of the first supporting piece and the two sides of the second supporting piece abut against the bottom plate and the transition plate respectively, the second supporting piece and the first supporting piece are arranged in a spaced mode and form an exhaust channel, the exhaust channel is communicated with the vent hole, and the exhaust direction of the exhaust channel faces the anti-explosion valve. The exhaust channel is formed between the first supporting piece and the second supporting piece, after high-temperature gas erupted by the battery module is exhausted to the exhaust channel, the high-temperature gas is limited by the first supporting piece and the second supporting piece and is rapidly exhausted to the anti-explosion valve along the exhaust channel, and rapid exhaust of the gas is achieved.

Description

Technical Field

[0001] This utility model relates to the field of electric vehicle battery technology, specifically to battery packs and electrical equipment. Background Technology

[0002] With the continuous development of new energy sources, the market demand for battery packs will continue to grow. To meet market demand, battery pack technology is constantly innovating, aiming to improve range and reduce costs.

[0003] For battery packs, in addition to requirements for energy density and charging speed, safety performance is also paramount. Therefore, improving battery pack safety is a pressing issue that needs to be addressed in the field of battery pack technology. Utility Model Content

[0004] In view of this, the present invention provides a battery pack and electrical equipment to solve the problem of how to improve the safety performance of the battery pack.

[0005] In a first aspect, this utility model provides a battery pack having intersecting first, second, and third directions, comprising: a frame structure having a receiving cavity, wherein an explosion-proof valve is disposed on the frame structure; a battery module disposed within the receiving cavity; a transition plate disposed within the receiving cavity, wherein a vent is formed along the third direction on the transition plate, the transition plate being disposed on one side of the battery module in the third direction, the vent being adapted to discharge gas emitted by the battery module; a base plate disposed on one side of the frame structure in the third direction, the base plate being spaced apart from the transition plate; a first support member having a rigid structure, wherein the first support member abuts against the base plate and the transition plate on both sides in the third direction respectively; a second support member having an elastic structure, wherein the second support member abuts against the base plate and the transition plate on both sides in the third direction respectively, the second support member being spaced apart from the first support member, and an exhaust channel being formed between the second support member and the first support member, the exhaust channel communicating with the vent, the exhaust direction of the exhaust channel being towards the explosion-proof valve.

[0006] Beneficial effects: An exhaust channel is formed between the first and second support members. After the high-temperature gas emitted by the battery module is discharged into the exhaust channel, it is constrained by the first and second support members on both sides of the channel and rapidly discharged towards the explosion-proof valve. This rapid discharge of the high-temperature gas reduces its time inside the battery pack, minimizing its impact and thus improving the battery pack's safety. The first and second support members are positioned between the base plate and the transition plate, increasing the support strength between them and preventing collisions. The second support member has a certain degree of elasticity, absorbing impacts from the battery module direction and maintaining the battery pack's stability.

[0007] In one optional embodiment, the first support member includes a first abutting portion, a second abutting portion, and a connecting portion. The first abutting portion abuts against the transition plate, the second abutting portion abuts against the base plate, and the two ends of the connecting portion are respectively connected to the first abutting portion and the second abutting portion. The first abutting portion, the second abutting portion, the connecting portion, the second support member, and the base plate together form the exhaust channel.

[0008] Beneficial effects: Dividing the first support member into a first abutting part, a second abutting part, and a connecting part allows for individual manufacturing, simplifies the manufacturing process, and enables adjustments to individual parts as needed, increasing design flexibility.

[0009] In one optional embodiment, the end of the connecting portion connected to the first abutting portion is provided with a first arc-shaped portion, the first arc-shaped portion connecting the connecting portion and the first abutting portion, the concave surface of the first arc-shaped portion facing the exhaust channel, and / or, the end of the connecting portion connected to the second abutting portion is provided with a second arc-shaped portion, the second arc-shaped portion connecting the connecting portion and the second abutting portion, the concave surface of the second arc-shaped portion facing the exhaust channel.

[0010] Beneficial effects: By setting the first arc-shaped part or the second arc-shaped part, a smooth connection between the first abutting part or the second abutting part and the connecting part is achieved, which reduces the flow resistance of high-temperature gas in the exhaust channel and facilitates the rapid discharge of high-temperature gas.

[0011] In one alternative embodiment, the first abutting portion, the second abutting portion, and the connecting portion are integrally formed.

[0012] Beneficial effects: The first abutment part, the second abutment part and the connecting part are integrally molded, the molding operation is simple and the structural strength is high.

[0013] In one alternative embodiment, the second support member is a foam strip.

[0014] In one optional embodiment, along the first direction, a plurality of first support members are spaced apart, a plurality of second support members are spaced apart, the first support members and the second support members are arranged alternately, and a second support member is disposed between any two adjacent first support members, and a first support member is disposed between any two adjacent second support members.

[0015] In one optional embodiment, along the second direction, a plurality of first support members are spaced apart, a plurality of second support members are spaced apart, the first support members and the second support members are arranged alternately, and a second support member is disposed between any two adjacent first support members, and a first support member is disposed between any two adjacent second support members.

[0016] In one optional embodiment, the first support member is provided with a plurality of spaced-apart members along the second direction, and / or the second support member is provided with a plurality of spaced-apart members along the second direction.

[0017] In one alternative implementation, along the third direction, the height of the second support member is greater than the height of the first support member.

[0018] Beneficial effect: Along the thickness direction of the battery pack, the height of the second support is greater than that of the first support, which is beneficial for the second support to absorb compressive stress.

[0019] In one optional embodiment, the battery pack further includes a heat insulation plate disposed on the side of the base plate near the transition plate, the heat insulation plate abutting against the base plate, and a clearance groove provided on the heat insulation plate, the clearance groove being provided corresponding to the positions of the first support member and the second support member.

[0020] Beneficial effects: By installing a heat insulation plate, high-temperature gases are prevented from directly contacting the base plate, thus preventing damage to the base plate from the high-temperature gases and improving the safety of the battery pack.

[0021] In one optional embodiment, the transition plate includes a first plate and a second plate, a flow channel is formed between the first plate and the second plate, the flow channel is adapted for the flow of cooling medium, and the vent hole is disposed through the first plate and the second plate, and the vent hole is disposed separately from the flow channel.

[0022] Beneficial effects: A flow channel for cooling medium is formed between the first plate and the second plate to cool the battery module and at the same time cool the high-temperature gas in the exhaust channel.

[0023] In one alternative implementation, along a first direction, both the first support and the second support are offset from the flow channel.

[0024] Beneficial effects: By misaligning the first and second supports with the flow channel, the support effect is ensured while ensuring that the flow channel does not deform or shrink when the battery pack is subjected to bottom impact, thus ensuring the cooling effect of the transition plate.

[0025] In one optional embodiment, the battery pack further includes a cover disposed on top of the battery module. The cover, the frame structure, and the base plate enclose a mounting cavity, and the battery module, the transition plate, the first support member, and the second support member are disposed within the mounting cavity.

[0026] In one alternative embodiment, the battery pack further includes a protective cover, which is disposed outside the explosion-proof valve, and the protective cover is connected to the frame structure and encloses it to form an exhaust port.

[0027] Beneficial effects: By installing a protective cover on the outside of the explosion-proof valve, the safety of the battery pack is improved, preventing the explosion-proof valve from being accidentally triggered by foreign objects.

[0028] Secondly, this utility model also provides an electrical device, including the aforementioned battery pack. Attached Figure Description

[0029] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0030] Figure 1 This is an exploded view of the battery pack according to an embodiment of the present invention;

[0031] Figure 2 This is a top view of the battery pack according to an embodiment of the present utility model;

[0032] Figure 3 for Figure 2 Schematic diagram of partial section of the middle AA;

[0033] Figure 4 for Figure 3 Enlarged view of point B in the middle;

[0034] Figure 5 This is a schematic diagram of the structure of the first support member according to an embodiment of the present utility model;

[0035] Figure 6 This is a schematic diagram of the structure of the second support member according to an embodiment of the present utility model;

[0036] Figure 7 This is a schematic diagram of the structural arrangement of the first support member and the second support member according to an embodiment of the present utility model;

[0037] Figure 8 This is a schematic diagram of another structural arrangement of the first support member and the second support member in an embodiment of the present utility model.

[0038] Explanation of reference numerals in the attached figures:

[0039] 10. Battery module; 20. Transition plate; 21. First plate; 22. Second plate; 23. Vent hole; 24. Flow channel; 30. Base plate; 40. First support member; 41. First abutment part; 42. Second abutment part; 43. Connecting part; 44. First arc-shaped part; 45. Second arc-shaped part; 50. Second support member; 60. Frame structure; 61. Explosion-proof valve; 70. Heat insulation plate; 80. Cover; 90. Protective cover; 100. Exhaust channel. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0041] The following is combined with Figures 1 to 8 The following describes embodiments of the present invention.

[0042] According to an embodiment of the present invention, in a first aspect, a battery pack is provided, having intersecting first direction X, second direction Y, and third direction Z, including a battery module 10, a transition plate 20, a base plate 30, a first support member 40, a second support member 50, and a frame structure 60. The frame structure 60 has a receiving cavity, and an explosion-proof valve 61 is disposed on the frame structure 60; the battery module 10 is disposed within the receiving cavity; the transition plate 20 is disposed within the receiving cavity, and the transition plate 20 has a vent 23 along the third direction Z, the transition plate 20 being disposed on the side of the battery module 10 in the third direction Z, and the vent 23 being suitable for discharging gas emitted by the battery module 10; the base plate 30 is disposed on the side of the frame structure 60 in the third direction Z, and the base plate 30 and the transition plate 20 are spaced apart; the first support member 40... The first support member 40 is a rigid structure, and it abuts against the base plate 30 and the transition plate 20 on both sides of the third direction Z. The second support member 50 is an elastic structure, and it abuts against the base plate 30 and the transition plate 20 on both sides of the third direction Z. The second support member 50 and the first support member 40 are spaced apart, and an exhaust channel 100 is formed between the second support member 50 and the first support member 40. The exhaust channel 100 is connected to the vent 23, and the exhaust direction of the exhaust channel 100 is towards the explosion-proof valve 61.

[0043] In the battery pack of this embodiment, an exhaust channel 100 is formed between the first support member 40 and the second support member 50. After the high-temperature gas emitted by the battery module 10 is discharged into the exhaust channel 100, the high-temperature gas is restricted by the first support member 40 and the second support member 50 on both sides of the exhaust channel 100 and is quickly discharged towards the explosion-proof valve 61 along the exhaust channel 100, realizing the rapid discharge of high-temperature gas, reducing the time of high-temperature gas inside the battery pack, reducing the impact of high-temperature gas on the battery pack, and thus improving the safety of the battery pack. The first support member 40 and the second support member 50 are disposed between the base plate 30 and the transition plate 20, improving the support strength between the base plate 30 and the transition plate 20 and preventing the base plate 30 and the transition plate 20 from colliding. The second support member 50 has a certain elasticity and can absorb the impact from the direction of the battery module 10 to maintain the stability of the battery pack.

[0044] It should be noted that the battery module 10 includes several individual battery cells. During charging and discharging, high-temperature gas may be generated inside each battery cell, causing an increase in internal pressure. To ensure the safety of the individual battery cells, they expel the high-temperature gas through their own exhaust valves. However, after being ejected from the individual battery cells, the high-temperature gas enters the battery pack and needs to be further discharged through the battery pack's explosion-proof valve 61. To prevent the high-temperature gas from remaining inside the battery pack for too long and to prevent overheating, this embodiment uses a first support member 40 and a second support member 50 to form an exhaust channel 100. The sidewalls of the first and second support members 40 and 50 are used to restrict and guide the gas to flow rapidly towards the explosion-proof valve 61, reducing the time the high-temperature gas spends inside the battery pack.

[0045] Specifically, in this embodiment, the gas ejection direction of the battery module 10 is set towards the bottom of the battery pack.

[0046] It should be noted that the gas ejection direction of the battery module 10 is set towards the bottom of the battery pack, so that the ejection direction of the high-temperature gas is away from the passenger compartment of the car, in order to ensure the safety of the passenger compartment.

[0047] It is understandable that the first support member 40 is a rigid structure, which can ensure the support strength between the base plate 30 and the transition plate 20 and prevent the base plate 30 and the transition plate 20 from colliding.

[0048] It should be noted that vibrations will occur during vehicle movement, which may cause the base plate 30 to collide with the transition plate 20, resulting in damage to the battery pack base plate 30 or the transition plate 20, thus creating a safety hazard.

[0049] In one embodiment, such as Figure 5 As shown, the first support member 40 includes a first abutting part 41, a second abutting part 42, and a connecting part 43. The first abutting part 41 abuts against the transition plate 20, the second abutting part 42 abuts against the base plate 30, and the two ends of the connecting part 43 are respectively connected to the first abutting part 41 and the second abutting part 42. The first abutting part 41, the second abutting part 42, the connecting part 43, the second support member 50, and the base plate 30 together form an exhaust channel 100. Dividing the first support member 40 into the first abutting part 41, the second abutting part 42, and the connecting part 43 allows for individual manufacturing, simplifying the manufacturing process. Furthermore, adjustments can be made to individual parts according to actual needs, increasing design flexibility.

[0050] For details, please refer to Figure 5 In this embodiment, the first abutting part 41 and the second abutting part 42 are arranged parallel and spaced apart, and the two ends of the connecting part 43 are respectively connected to the first abutting part 41 and the second abutting part 42 at a perpendicular angle to form an "I" shaped structure.

[0051] It should be noted that in other alternative embodiments, the connecting part 43 and the first abutting part 41 or the connecting part 43 and the second abutting part 42 can be connected at other angles, but the "I" structure has higher structural strength and stability, so a vertical angle is preferred.

[0052] In one embodiment, such as Figure 5 As shown, the end of the connecting portion 43 connected to the first abutting portion 41 is provided with a first arc-shaped portion 44, which connects the connecting portion 43 and the first abutting portion 41. The concave surface of the first arc-shaped portion 44 faces the exhaust channel 100. The end of the connecting portion 43 connected to the second abutting portion 42 is provided with a second arc-shaped portion 45, which connects the connecting portion 43 and the second abutting portion 42. The concave surface of the second arc-shaped portion 45 faces the exhaust channel 100. By providing the first arc-shaped portion 44 or the second arc-shaped portion 45, a smooth connection between the first abutting portion 41 or the second abutting portion 42 and the connecting portion 43 is achieved, reducing the flow resistance of high-temperature gas in the exhaust channel 100 and facilitating the rapid discharge of high-temperature gas.

[0053] In other alternative embodiments, only the first arcuate portion 44 may be provided, or only the second arcuate portion 45 may be provided.

[0054] In one embodiment, the first abutting part 41, the second abutting part 42, and the connecting part 43 are integrally formed. The integral forming of the first abutting part 41, the second abutting part 42, and the connecting part 43 simplifies the forming process and provides high structural strength.

[0055] In one embodiment, the second support 50 is a foam strip.

[0056] In other alternative embodiments, the second support member 50 may also be other elastic structures such as a spring sheet.

[0057] In one embodiment, such as Figure 7 As shown, along the first direction X, there are several first support members 40 spaced apart, and several second support members 50 spaced apart. The first support members 40 and the second support members 50 are arranged alternately. There is a second support member 50 between any two adjacent first support members 40, and a first support member 40 between any two adjacent second support members 50.

[0058] In another embodiment, such as Figure 8 As shown, along the second direction Y, there are several first support members 40 spaced apart, and several second support members 50 spaced apart. The first support members 40 and the second support members 50 are arranged alternately. There is a second support member 50 between any two adjacent first support members 40, and a first support member 40 between any two adjacent second support members 50.

[0059] In yet another embodiment, the first support member 40 and the second support member 50 may also be arranged in a "rice" - shaped distribution; or, the first support member 40 and the second support member 50 may also be arranged in a "cross" - shaped distribution.

[0060] In one embodiment, as Figure 7 shown, a plurality of first support members 40 are arranged at intervals along the second direction Y, and a plurality of second support members 50 are arranged at intervals along the second direction Y.

[0061] It should be noted that the number of the first support members 40 and the number of the second support members 50 can be adjusted according to actual needs.

[0062] Of course, in other alternative embodiments, it is also possible to only arrange a plurality of first support members 40 at intervals along the second direction Y and only arrange one second support member 50 along the second direction Y; or, it is also possible to only arrange a plurality of second support members 50 at intervals along the second direction Y and only arrange one second support member 50 along the second direction Y.

[0063] In one embodiment, along the third direction Z, the height of the second support member 50 is greater than the height of the first support member 40.

[0064] Specifically, the third direction Z is the thickness direction of the battery pack.

[0065] It is worth noting that along the thickness direction of the battery pack, the height of the second support member 50 being greater than the height of the first support member 40 is beneficial for the second support member to compress and absorb stress.

[0066] In one embodiment, as Figure 4 shown, the battery pack further includes a heat insulation plate 70. The heat insulation plate 70 is arranged on one side of the bottom plate 30 close to the transition plate 20. The heat insulation plate 70 abuts against the bottom plate 30, and a relief groove is arranged on the heat insulation plate 70 at positions corresponding to the first support member 40 and the second support member 50. By arranging the heat insulation plate 70, it is possible to prevent high - temperature gas from directly contacting the bottom plate 30, prevent the bottom plate 30 from being damaged by the influence of high - temperature gas, and improve the safety of the battery pack.

[0067] In one embodiment, as Figure 4 shown, the transition plate 20 includes a first plate body 21 and a second plate body 22. A flow channel 24 is formed between the first plate body 21 and the second plate body 22, and the flow channel is suitable for the circulation of a cooling medium. The vent holes 23 penetrate through the first plate body 21 and the second plate body 22, and the vent holes 23 are arranged in a partitioned manner with respect to the flow channel 24. By forming a flow channel for the circulation of the cooling medium between the first plate body and the second plate body, the cooling of the battery module can be achieved, and at the same time, the high - temperature gas in the exhaust passage 100 can be cooled.

[0068] Specifically, the flow channel 24 is formed in several intervals.

[0069] Specifically, the first plate 21 abuts against the battery module 10 to support the battery module 10 and prevent the battery module 10 from sinking towards the base plate 30.

[0070] It should be noted that the vent 23 is isolated from the flow channel 24 to prevent the cooling medium in the flow channel 24 from leaking out.

[0071] In one embodiment, such as Figure 4 As shown, along the first direction X, the first support member 40 and the second support member 50 are both offset from the flow channel 24.

[0072] It is worth noting that by misaligning the first support member 40 and the second support member 50 with the flow channel 34, the support effect of the support member is ensured, while ensuring that the flow channel 24 will not deform or shrink when the battery pack is subjected to bottom impact, thus ensuring the cooling effect of the transition plate 20.

[0073] In one embodiment, the battery pack further includes a cover 80, which is disposed on the top of the battery module 10. The cover 80, the frame structure 60, and the bottom plate 30 enclose a mounting cavity, and the battery module 10, the transition plate 20, the first support member 40, and the second support member 50 are disposed within the mounting cavity.

[0074] In one embodiment, the battery pack further includes a protective cover 90, which covers the outside of the explosion-proof valve 61. The protective cover 90 is connected to and encloses the frame structure 60 to form an exhaust port. By providing a protective cover 90 on the outside of the explosion-proof valve 61, the explosion-proof valve 61 is prevented from being accidentally activated by foreign objects, thereby improving the safety of the battery pack.

[0075] It should be noted that during vehicle operation, stones or other foreign objects on the road may pass through the vehicle chassis. If the explosion-proof valve 61 is directly exposed on the outside, these objects may accidentally trigger it, posing a safety hazard. In this embodiment, a protective cover 90 is installed over the outside of the explosion-proof valve 61 to prevent stones or other foreign objects from accidentally triggering it, thereby improving the safety of the battery pack.

[0076] According to an embodiment of the present invention, in a second aspect, an electrical device is also provided, including the battery pack described above.

[0077] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the present invention.

Claims

1. A battery pack having intersecting first direction (X), second direction (Y) and third direction (Z), characterized in that, include: A frame structure (60) having a receiving cavity, and an explosion-proof valve (61) is provided on the frame structure (60); A battery module (10) is disposed within the receiving cavity; A transition plate (20) is disposed in the receiving cavity. The transition plate (20) has a vent (23) along the third direction (Z). The transition plate (20) is disposed on one side of the battery module (10) in the third direction (Z). The vent (23) is adapted to discharge the gas emitted by the battery module (10). A base plate (30) is disposed on one side of the frame structure (60) in the third direction (Z), and the base plate (30) and the transition plate (20) are spaced apart; The first support member (40) is a rigid structure, and the first support member (40) abuts against the base plate (30) and the transition plate (20) on both sides of the third direction (Z). The second support member (50) is an elastic structure. The second support member (50) abuts against the base plate (30) and the transition plate (20) on both sides of the third direction (Z). The second support member (50) is spaced apart from the first support member (40). An exhaust channel (100) is formed between the second support member (50) and the first support member (40). The exhaust channel (100) is connected to the vent (23). The exhaust direction of the exhaust channel (100) is towards the explosion-proof valve (61).

2. The battery pack according to claim 1, characterized in that, The first support member (40) includes a first abutting part (41), a second abutting part (42), and a connecting part (43). The first abutting part (41) abuts against the transition plate (20), the second abutting part (42) abuts against the bottom plate (30), and the two ends of the connecting part (43) are respectively connected to the first abutting part (41) and the second abutting part (42). The first abutting part (41), the second abutting part (42), the connecting part (43), the second support member (50), and the bottom plate (30) together form the exhaust channel (100).

3. The battery pack according to claim 2, characterized in that, The connecting part (43) is provided with a first arc-shaped part (44) at one end connected to the first abutting part (41). The first arc-shaped part (44) connects the connecting part (43) and the first abutting part (41). The concave surface of the first arc-shaped part (44) faces the exhaust channel (100). And / or, the connecting part (43) is provided with a second arc-shaped part (45) at one end connected to the second abutting part (42). The second arc-shaped part (45) connects the connecting part (43) and the second abutting part (42). The concave surface of the second arc-shaped part (45) faces the exhaust channel (100).

4. The battery pack according to claim 2, characterized in that, The first abutting part (41), the second abutting part (42) and the connecting part (43) are integrally formed.

5. The battery pack according to claim 2, characterized in that, The second support member (50) is a foam strip.

6. The battery pack according to any one of claims 1-5, characterized in that, Along the first direction (X), there are several first support members (40) spaced apart, and several second support members (50) spaced apart. The first support members (40) and the second support members (50) are arranged alternately. A second support member (50) is arranged between any two adjacent first support members (40), and a first support member (40) is arranged between any two adjacent second support members (50).

7. The battery pack according to claim 6, characterized in that, Along the second direction (Y), there are several first support members (40) spaced apart, and several second support members (50) spaced apart. The first support members (40) and the second support members (50) are arranged alternately. A second support member (50) is arranged between any two adjacent first support members (40), and a first support member (40) is arranged between any two adjacent second support members (50).

8. The battery pack according to any one of claims 1-5, characterized in that, The first support member (40) is provided with a plurality of spaced-apart members along the second direction (Y), and / or the second support member (50) is provided with a plurality of spaced-apart members along the second direction (Y).

9. The battery pack according to any one of claims 1-5, characterized in that, Along the third direction (Z), the height of the second support (50) is greater than the height of the first support (40).

10. The battery pack according to any one of claims 1-5, characterized in that, The battery pack also includes a heat insulation plate (70), which is disposed on the side of the base plate (30) near the transition plate (20). The heat insulation plate (70) abuts against the base plate (30). The heat insulation plate (70) is provided with a clearance groove, which is provided at the positions of the first support member (40) and the second support member (50).

11. The battery pack according to any one of claims 1-5, characterized in that, The transition plate (20) includes a first plate (21) and a second plate (22), and a flow channel (24) is formed between the first plate (21) and the second plate (22). The flow channel (24) is suitable for the flow of cooling medium. The vent (23) is provided through the first plate (21) and the second plate (22), and the vent (23) is separated from the flow channel (24).

12. The battery pack according to claim 11, characterized in that, Along the first direction (X), both the first support member (40) and the second support member (50) are offset from the flow channel.

13. The battery pack according to any one of claims 1-5, characterized in that, The battery pack also includes a cover (80), which is disposed on the top of the battery module (10). The cover (80), the frame structure (60), and the base plate (30) enclose a mounting cavity. The battery module (10), the transition plate (20), the first support member (40), and the second support member (50) are disposed in the mounting cavity.

14. The battery pack according to any one of claims 1-5, characterized in that, The battery pack also includes a protective cover (90), which is placed on the outside of the explosion-proof valve (61). The protective cover (90) is connected to and encloses the frame structure (60) to form an exhaust port.

15. An electrical appliance, characterized in that, The battery pack includes any one of claims 1 to 14.

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