Battery pack and electric equipment

Abstract

The utility model relates to the field of batteries, and particularly discloses a battery pack and electric equipment. Wherein the battery pack has a first direction, and the battery pack comprises a box body which is provided with an accommodating cavity; the fire extinguishing device further comprises a single battery and a storage device, the single battery and the storage device are distributed in the containing cavity in the first direction, and a storage cavity used for containing a fire extinguishing agent is formed in the storage device. Wherein the storage device is provided with a side sealing wall facing the single battery, at least part of the side sealing wall is arranged to be a fusing part which can be melted after being heated, and the fusing part is in contact communication with the liquid storage cavity; the single battery is provided with an anti-explosion valve, and the anti-explosion valve is arranged towards the fusing part in the first direction. When the single battery is in thermal runaway, high-temperature flames are discharged from the anti-explosion valve and are jetted towards the fusing part, and the fusing part is fused through under the action of the high-temperature flames, so that the fire extinguishing agent in the storage cavity is jetted out to extinguish fire and cool the interior of the battery pack, the spreading of thermal runaway is reduced, and the safety performance of the battery pack during thermal runaway is effectively improved.

Description

Technical Field

[0001] The present application relates to the field of secondary batteries, and in particular to a battery pack and an electrical device. Background Art

[0002] The battery pack is a core component in the new energy field, and its safety performance should be given enough attention. When the single battery in the battery pack is in thermal runaway, it will generate high temperature, flames, solid, liquid and gas impurities, etc., and generally will be released from the explosion-proof valve of the single battery, causing the battery pack to burn and explode.

[0003] Although pressure relief valves and pressure relief channels are designed in the battery pack in the existing related technologies, it is still difficult to effectively reduce the risk of high-temperature runaway or spread caused by thermal runaway of the single battery. The high-temperature flame generated by thermal runaway still has the potential to ignite vehicles and other new energy equipment, posing a major safety hazard to users.

[0004] Application Contents

[0005] The present application provides a battery pack and electrical equipment to solve or reduce the safety risks such as combustion caused by thermal runaway of single cells in the existing related technologies.

[0006] The present application provides a battery pack having a first direction, comprising:

[0007] A box body having a containing cavity;

[0008] A single cell and a storage device, wherein the single cell and the storage device are distributed in the accommodating cavity along the first direction, and the storage device has a storage cavity for containing a fire extinguishing agent;

[0009] Wherein, the storage container has a side sealing wall facing the single battery, at least part of the side sealing wall is configured as a fuse part that can be melted by heat, and the fuse part is in contact and communication with the liquid storage cavity; the single battery is provided with an explosion-proof valve, and the explosion-proof valve is arranged in the first direction toward the fuse part.

[0010] To implement the above technical solution, when a single cell thermally runs away, high-temperature flames, electrolyte and other impurities are discharged from the explosion-proof valve and sprayed toward the fuse part. The fuse part is melted through by the high-temperature flame, so that the fire extinguishing agent in the storage cavity is sprayed out from the corresponding area of ​​the fuse part after the melting, thereby extinguishing the fire and cooling the inside of the battery pack to reduce the spread of thermal runaway and effectively improve the safety performance of the battery pack during thermal runaway.

[0011] In an optional example, a restraining member is provided on the side sealing wall, and a restraining channel is provided on the restraining member along the first direction, and the area defined by the edge of the positive projection of the restraining channel on the side sealing wall at least partially overlaps with the area defined by the fuse portion.

[0012] By implementing the above technical solution, when a single cell thermally runs away, a high-temperature flame will burst out from the explosion-proof valve, and subsequently be restricted by the constraint channel to more efficiently contact the fuse part, thereby more efficiently melting through the fuse part, thereby ensuring that the fire extinguishing agent in the storage cavity flows out effectively, quickly curbing the spread of thermal runaway and ensuring safety.

[0013] In an optional example, the restraining member is provided with a pressure relief port, and the pressure relief port is communicated with the restraining channel.

[0014] By implementing the above technical solution, when a single cell thermally runs away, the solid and liquid impurities ejected from the explosion-proof valve can flow out and diffuse from the pressure relief port, reducing the situation where the solid and liquid impurities cover the fuse part, so as to tend to make the high-temperature flame contact the fuse part more directly and efficiently, thereby efficiently melting through the fuse part, so that the fire extinguishing agent can be ejected from the melted area to quickly extinguish the fire.

[0015] In an optional example, the restraining member includes a plurality of baffles, which are arranged in a ring-shaped manner and spaced apart from each other. The plurality of baffles together form the restraining channel, and the intervals between adjacent baffles form the pressure relief port.

[0016] In an optional example, a flame retardant sheet is provided on the side sealing wall, the restraint member is arranged on the side of the flame retardant sheet away from the side sealing wall, a first through hole is opened on the flame retardant sheet along the first direction, and the first through hole is connected to the restraint channel.

[0017] To implement the above technical solution, taking into account the processing technology issues, the entire material of the storage device may be a fuse part that can be melted by heat during manufacturing, for example, the material is PE material. At this time, using a flame retardant sheet and opening a first through hole in the flame retardant sheet can effectively limit the contact area between the high-temperature flame and the storage device to the area defined by the first through hole, thereby ensuring that the high-temperature flame can efficiently and locally melt through the fuse part, reducing the area of ​​the melt-through region, and allowing the fire extinguishing agent to be ejected from the melt-through region at a relatively high speed, so as to achieve the effect of efficiently extinguishing fire or curbing the spread of thermal runaway.

[0018] In an optional example, a heat exchange plate is further included, which is arranged in the accommodating cavity, the heat exchange plate is clamped between the storage device and the single battery, a heat exchange channel is provided in the heat exchange plate, a second through hole is opened on the heat exchange plate along the first direction, and the second through hole is connected to the constraint channel.

[0019] In an optional example, it further includes a support plate disposed in the accommodating cavity, wherein the support plate is disposed on a side of the storage device away from the single battery;

[0020] The support plate is recessed in the first direction away from the single battery to form a receiving groove, the reservoir is embedded in the receiving groove, the heat exchange plate and the support plate are fitted to enclose the receiving groove to form a pressure relief channel, and the pressure relief channel is connected to the constraint channel.

[0021] In an optional example, a buffer is further provided on a side of the support plate facing the heat exchange plate, and the buffer abuts against the heat exchange plate.

[0022] By implementing the above technical solution, the buffer component can play a role in buffering and blocking the transfer of high temperature.

[0023] In an optional example, the reservoir is provided with a liquid inlet, the liquid inlet is connected to a liquid inlet pipe, and the liquid inlet pipe is provided with a pressure reducing valve.

[0024] To implement the above technical solution, the pressure reducing valve can maintain the pressure of the liquid inlet pipe entering the liquid inlet port, thereby ensuring that the pressure of the fire extinguishing agent entering the storage is maintained within a stable pressure range. When the single battery thermally runs away and the high-temperature flame ejected from the explosion-proof valve melts through the fuse, it can ensure that the fire extinguishing agent ejected from the storage chamber is maintained within a certain pressure range, thereby effectively performing the fire extinguishing operation.

[0025] On the other hand, the present application also provides an electrical device, which includes: the battery pack mentioned above.

[0026] One of the above technical solutions has the following advantages or beneficial effects:

[0027] 1. When a single battery cell is in thermal runaway, high-temperature flames, electrolyte and other impurities are discharged from the explosion-proof valve and sprayed toward the fuse part. The fuse part is melted through by the high-temperature flame, so that the fire extinguishing agent in the storage cavity is sprayed out from the corresponding area of ​​the fuse part after melting through, thereby extinguishing the fire and cooling the inside of the battery pack to reduce the spread of thermal runaway and effectively improve the safety performance of the battery pack during thermal runaway;

[0028] 2. Through the setting of the restraint parts and the restraint channels, when a single cell thermally runs away, a high-temperature flame will be ejected from the explosion-proof valve, and will be restricted by the restraint channels to contact the fuse more efficiently, thereby more efficiently melting through the fuse, thereby ensuring that the fire extinguishing agent in the storage cavity flows out effectively, quickly curbing the spread of thermal runaway and ensuring safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The technical solution and other beneficial effects of the present application will be made apparent by describing in detail the specific implementation methods of the present application in conjunction with the accompanying drawings.

[0030] Figure 1 is an overall structural diagram of the battery pack provided in Example 1 of the present application;

[0031] Figure 2 is an overall exploded structural diagram of the battery pack provided in Example 1 of the present application;

[0032] Figure 3 is a cross-sectional view provided in Example 1 of the present application for showing the internal structure of a battery pack;

[0033] Figure 4 This is provided in Example 1 of the present application Figure 3 A partial enlarged view of part A;

[0034] Figure 5 It is an exploded structural diagram provided in Example 1 of the present application, mainly used to show the structure of the heat exchange plate;

[0035] Figure 6 It is an exploded structural diagram provided in Example 1 of the present application, mainly used to show the support plate structure;

[0036] Figure 7 It is an exploded structural diagram provided in Example 1 of the present application and mainly used to show the structure of the restraint member;

[0037] Figure 8 This is provided in Example 1 of the present application Figure 7 A partial enlarged view of part B;

[0038] Fig. 9 This is provided in Example 1 of the present application Figure 7 A partial enlarged view of part C.

[0039] Reference numerals: 1, box body; 11, accommodating cavity; 1a, box body; 1b, cover body;

[0040] 2. Single battery; 21. Explosion-proof valve; 211. First projection;

[0041] 3. Storage; 31. Side sealing wall; 311. Fusing part; 32. Storage cavity; 3a. Liquid inlet; 3b. Liquid outlet; 3m. Diverter; 3n. Collector;

[0042] 4. Constraints; 41. Constraint passage; 42. Pressure relief port;

[0043] 5. flame retardant sheet; 51. first through hole; 511. second projection;

[0044] 6, heat exchange plate; 61, heat exchange channel; 62, second through hole; 6a, top plate; 6b, bottom plate; 6b1, heat exchange inlet; 6b2, heat exchange outlet;

[0045] 7. Support plate; 71. Accommodation groove; 72. Pressure relief channel;

[0046] 8. Buffer; 9. Liquid inlet pipe; 10. Pressure reducing valve;

[0047] Z, first direction;

[0048] 100. Thermal conductive adhesive layer. DETAILED DESCRIPTION

[0049] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0050] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the term "and / or" in this article is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article, unless otherwise specified, generally indicates that the associated objects before and after are in an "or" relationship.

[0051] The following is combined with Figure 1-9 The present application is further described.

[0052] Reference Figure 1 and Figure 2 , is a battery pack provided by the present application, the battery pack has a first direction Z, and includes a box body 1, the box body 1 includes a box body 1a and a cover body 1b, the box body 1a is provided with an opening in the first direction Z, and the cover body 1b is covered on the opening along the first direction Z to form a closed accommodating cavity 11. In other optional embodiments, the cover body 1b is not limited to being connected to the box body 1a along the first direction Z.

[0053] Reference Figure 2 and Figure 3 The battery pack also includes a single cell 2, a heat exchange plate 6, a storage 3 and a support plate 7 distributed in sequence in the accommodating cavity 11 along the first direction Z. The single cell 2 refers to a basic unit that can realize the mutual conversion of chemical energy and electrical energy. There are multiple single cells 2, and each single cell 2 is provided with an explosion-proof valve 21 on one side facing the heat exchange plate 6 in the first direction Z. Each single cell 2 is provided with a positive pole column and a negative pole column, and the positive pole column and the negative pole column protrude out of the shell of the single cell 2 on the side away from the heat exchange plate 6 in the first direction Z. When the single cell 2 is thermally runaway, solid and liquid impurities, high-temperature flames or high-temperature gases in the single cell 2 are ejected from the explosion-proof valve 21.

[0054] Reference Figure 4 and Figure 5, mainly introduces the relevant details of the heat exchange plate 6. The heat exchange plate 6 includes a top plate 6a and a bottom plate 6b arranged in sequence along the first direction Z, and the bottom plate 6b is located on the side of the top plate 6a away from the single battery 2 in the first direction Z. The bottom plate 6b is recessed in the direction away from the top plate 6a to provide a heat exchange channel 61, and the top plate 6a and the bottom plate 6b are fitted and fixedly connected to close the heat exchange channel 61. A heat exchange inlet 6b1 and a heat exchange outlet 6b2 are provided on the heat exchange plate 6 to facilitate the circulation of the heat exchange medium. Specifically, in this embodiment, the heat exchange inlet 6b1 and the heat exchange outlet 6b2 are located on the same side of the heat exchange plate 6. In other optional examples, the heat exchange inlet 6b1 and the heat exchange outlet 6b2 may also be located on different sides of the heat exchange plate 6. In addition, a plurality of second through holes 62 are formed on the heat exchange plate 6 along the first direction Z, and the second through holes 62 correspond to the explosion-proof valves 21 one by one. When the single battery 2 is in thermal runaway, the high-temperature flame in the single battery 2 is convenient to be ejected through the second through holes 62 and finally ejected onto the storage 3. The heat exchange plate 6 mainly controls the temperature of the single battery 2, and the second through holes 62 are provided to facilitate the smooth ejection of the material in the explosion-proof valve 21 when thermal runaway occurs.

[0055] It should be noted that the position where the second through hole 62 penetrates the heat exchange plate 6 should be to avoid the area of ​​the heat exchange channel 61, that is, the second through hole 62 and the heat exchange channel 61 are not connected to each other. In order to improve the heat exchange effect, a layer of heat conductive adhesive layer 100 is set between the heat exchange plate 6 and the single battery 2, which can be seen in Figure 2 The thermal conductive adhesive layer 100 also needs to reserve a hole corresponding to the explosion-proof valve 21 area for the material in the single cell 2 to be ejected when the single cell 2 has thermal runaway.

[0056] Reference Figure 4 , Figure 6-Figure 9 , mainly introduces the relevant detailed settings of the storage 3 and the support plate 7.

[0057] Reference Figure 4 and Figure 6 , the support plate 7 is arranged on the side of the storage 3 away from the single battery 2. The support plate 7 is recessed away from the single battery 2 in the first direction Z to provide a receiving groove 71, the notch of the receiving groove 71 faces the single battery 2, and the storage 3 is at least partially embedded in the receiving groove 71. A buffer 8 is also provided on the side of the support plate 7 facing the heat exchange plate 6, and the buffer 8 abuts against the heat exchange plate 6. In this embodiment, the buffer 8 is configured as a foam sheet with a flame retardant effect. The buffer 8 can play a role in buffering and blocking the conduction and spread of high-temperature flames. The heat exchange plate 6, the buffer 8 and the support plate 7 are arranged to abut against each other so as to enclose the receiving groove 71 to form a pressure relief channel 72. The solid and liquid impurities, high-temperature gases and flames in the single battery 2 are ejected from the explosion-proof valve 21, can be dispersed along the pressure relief channel 72, and finally discharged from the pressure relief valve of the battery pack to reduce safety risks.

[0058] Reference Figure 4 , Figure 7 and Figure 8 The storage 3 has a side sealing wall 31 facing the single battery 2, at least part of the side sealing wall 31 is configured as a heat-meltable fuse 311, the fuse 311 is in contact and communication with the storage cavity 32, and the fuse 311 is arranged opposite to the explosion-proof valve 21 in the first direction Z. Specifically, the fuse 311 is configured to be made of PE material in this embodiment, which can be melted at a temperature above 120 degrees Celsius.

[0059] The above setting ensures that when the single cell 2 thermally runs away, high-temperature flames, electrolyte and other impurities are discharged from the explosion-proof valve 21 and sprayed toward the fuse part 311. The fuse part 311 is melted through by the high-temperature flame, so that the fire extinguishing agent in the storage cavity 32 is sprayed out from the corresponding area of ​​the fuse part 311 after the melt-through, thereby extinguishing the fire and cooling the inside of the battery pack to reduce the spread of thermal runaway and effectively improve the safety performance of the battery pack during thermal runaway.

[0060] It should be noted that, considering the cost of manufacturing and the difficulty of the process, in other optional embodiments, the entire storage 3 can be set to PE material. The fire extinguishing agent in this embodiment is a coolant. In other optional embodiments, the fire extinguishing agent can also be other media that can effectively extinguish fires, such as dry powder foam, etc. In an optional embodiment, the storage cavity 32 of the storage 3 and the heat exchange channel 61 in the heat exchange plate 6 can be interconnected. For example, the coolant is supplied from the outside, and the coolant passes through the storage cavity 32 and the heat exchange channel 61 at the same time. At this time, the fire extinguishing agent should have multiple functions of liquid cooling, liquid heating and fire extinguishing.

[0061] Reference Figure 7 and Figure 8 More specifically, the storage 3 includes a diverter 3m and a collector 3n. Specifically, in this embodiment, the diverter 3m is configured to be flat, and the collector 3n is configured to be cylindrical. The diverter 3m is connected to the collector 3n, and the storage chamber 32 is provided in both the diverter 3m and the collector 3n. The diverter 3m is embedded in the receiving groove 71, and the side sealing wall 31 is provided on the diverter 3m. A liquid inlet 3a is provided at one end of the collector 3n, and a liquid outlet 3b is provided at the other end. The liquid inlet 3a is connected to a liquid inlet pipe 9, and a pressure reducing valve 10 is provided on the liquid inlet pipe 9. The pressure reducing valve 10 can maintain the pressure of the liquid inlet pipe 9 entering the liquid inlet port 3a, thereby ensuring that the pressure of the fire extinguishing agent entering the storage 3 is maintained within a stable pressure range. When the single battery 2 thermally runs away and the high-temperature flame ejected from the explosion-proof valve 21 melts through the fuse 311, it can ensure that the fire extinguishing agent ejected from the storage chamber 32 is maintained within a certain pressure range, and the fire extinguishing operation is effectively performed.

[0062] Reference Figure 4 , Figure 7-Figure 9In an optional example, a restraining member 4 is provided on the side sealing wall 31, and a restraining channel 41 is provided on the restraining member 4 along the first direction Z, and the area defined by the edge of the orthographic projection of the restraining channel 41 on the side sealing wall 31 at least partially overlaps with the area defined by the fuse 311. The above setting enables that when the single battery 2 is in thermal runaway, the high-temperature flame sprays out from the explosion-proof valve 21, and is subsequently restricted by the restraining channel 41 to contact the fuse 311 more efficiently, thereby more efficiently melting the fuse 311, thereby ensuring that the fire extinguishing agent in the storage cavity 32 flows out effectively, quickly curbing the spread of thermal runaway, and ensuring safety.

[0063] In an optional example, the restraining member 4 is provided with a pressure relief port 42, which is in communication with the restraining channel 41. The axis of the pressure relief port 42 intersects with the first direction Z. The above setting enables, when the single battery 2 is in thermal runaway, the solid and liquid impurities ejected from the explosion-proof valve 21 can flow out and diffuse from the pressure relief port 42, reducing the situation where the solid and liquid impurities cover the fuse 311, so as to tend to make the high-temperature flame contact the fuse 311 more directly and efficiently, thereby efficiently melting through the fuse 311, so that the fire extinguishing agent is ejected from the melt-through area to quickly extinguish the fire.

[0064] More specifically, the restraining member 4 includes a plurality of baffles which are arranged in a ring-shaped manner and spaced apart from each other. The plurality of baffles together form a restraining channel 41 , and the intervals between adjacent baffles form a pressure relief port 42 .

[0065] It should be noted that in other optional embodiments, the structural form of the restraining member 4 can be a fixed block with a restraining channel 41 or the restraining member 4 is an integral sleeve structure, as long as the restraining member 4 forms a restraining channel 41 capable of restraining high-temperature gas or high-temperature flame, rather than being limited to the structure of two baffles in this embodiment.

[0066] In an optional example, a flame retardant sheet 5 is provided on the side sealing wall 31, and a restraining member 4 is provided on the side of the flame retardant sheet 5 away from the side sealing wall 31. A first through hole 51 is provided on the flame retardant sheet 5 along the first direction Z, and the first through hole 51 is connected to the restraining channel 41. This setting is made in consideration of the processing technology. When manufacturing the storage 3, the entire material may be a fuse 311 that can be melted by heat, for example, a PE material. At this time, the flame retardant sheet 5 is used and the first through hole 51 is provided in the flame retardant sheet 5. The contact area between the high-temperature flame and the storage 3 can be effectively limited to the area limited by the first through hole 51, thereby ensuring that the high-temperature flame can efficiently and locally melt through the fuse 311, reducing the area of ​​the melt-through area, so that the fire extinguishing agent can be ejected from the melt-through area at a relatively high speed, so as to achieve the effect of efficient fire extinguishing or curbing the spread of thermal runaway.

[0067] It should be noted that, refer to Figure 8In this embodiment, the explosion-proof valve 21 is projected on the side sealing wall 31 as a first projection 211, and the area defined by the projection edge of the first through hole 51 on the side sealing wall 31 is a second projection 511. In this embodiment, the areas of the fuse 311, the first projection 211, and the second projection 511 are reduced in sequence. However, it does not mean that the area size relationship of the fuse 311, the explosion-proof valve 21, and the first through hole 51 should be limited. As long as it is ensured that the high-temperature flame or gas ejected from the explosion-proof valve 21 can be finally ejected onto the fuse 311 along the constraint channel 41, and finally the fuse 311 is partially melted through. At this time, the fire extinguishing agent in the storage cavity 32 can be ejected from the melted area to carry out the fire extinguishing or cooling process, reduce the spread of thermal runaway, and ensure the safety performance of the battery pack.

[0068] On the other hand, the present application also provides an electric device, which includes the battery pack described above, wherein the electric device mainly refers to new energy vehicles, but it does not exclude that it may also be other devices that use the single battery 2, such as electrical tools, equipment, etc.

[0069] The above description is only a partial implementation method of the embodiments of the present application and does not constitute any form of limitation on the application. The protection scope of the embodiments of the present application is not limited thereto. Any simple modifications, equivalent changes and modifications that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the embodiments of the present application should be covered within the protection scope of the embodiments of the present application.

Claims

1. A battery pack, characterized in that: The battery pack has a first direction (Z), and the battery pack includes: A box body (1) having a containing cavity (11); A single cell (2) and a storage (3), wherein the single cell (2) and the storage (3) are distributed in the accommodating cavity (11) along the first direction (Z), and the storage (3) has a storage cavity (32) for containing a fire extinguishing agent; The storage container (3) has a side sealing wall (31) facing the single battery (2), at least part of the side sealing wall (31) is configured as a fuse (311) that can be melted by heat, and the fuse (311) is in contact and communication with the storage cavity (32); the single battery (2) is provided with an explosion-proof valve (21), and the explosion-proof valve (21) is arranged in the first direction (Z) toward the fuse (311).

2. The battery pack according to claim 1, characterized in that: A restraining member (4) is provided on the side sealing wall (31), and a restraining channel (41) is provided on the restraining member (4) along the first direction (Z), and an area defined by an edge of an orthographic projection of the restraining channel (41) on the side sealing wall (31) at least partially overlaps with an area defined by an orthographic projection of the explosion-proof valve (21) on the side sealing wall (31).

3. The battery pack according to claim 2, characterized in that: The restraining member (4) is provided with a pressure relief port (42), and the pressure relief port (42) is communicated with the restraining channel (41).

4. The battery pack according to claim 3, characterized in that: The restraining member (4) comprises a plurality of baffles, which are arranged in a ring-shaped manner at intervals, and the plurality of baffles together form the restraining channel (41), and the intervals between adjacent baffles form the pressure relief port (42).

5. The battery pack according to claim 2, characterized in that: A flame retardant sheet (5) is provided on the side sealing wall (31), the restraining member (4) is arranged on a side of the flame retardant sheet (5) away from the side sealing wall (31), a first through hole (51) is provided on the flame retardant sheet (5) along the first direction (Z), and the first through hole (51) is connected to the restraining channel (41).

6. The battery pack according to any one of claims 1 to 5, characterized in that: The storage container (3) is provided with a liquid inlet (3a), the liquid inlet (3a) is connected to a liquid inlet pipe (9), and the liquid inlet pipe (9) is provided with a pressure reducing valve (10).

7. The battery pack according to claim 2, characterized in that: The invention also comprises a heat exchange plate (6) which is arranged in the accommodating cavity (11), the heat exchange plate (6) being sandwiched between the storage device (3) and the single battery (2), the heat exchange plate (6) being provided with a heat exchange channel (61), the heat exchange plate (6) being provided with a second through hole (62) extending through the heat exchange plate (6) along the first direction (Z), the second through hole (62) being connected to the restraining channel (41).

8. The battery pack according to claim 7, characterized in that: It also includes a support plate (7) arranged in the accommodating cavity (11), wherein the support plate (7) is arranged on a side of the storage (3) away from the single battery (2); The support plate (7) is provided with a receiving groove (71) in the first direction (Z) away from the single battery (2); the storage device (3) is embedded in the receiving groove (71); the heat exchange plate (6) and the support plate (7) are arranged in a close fit to enclose the receiving groove (71) to form a pressure relief channel (72); and the pressure relief channel (72) is connected to the restraining channel (41).

9. The battery pack according to claim 8, characterized in that: A buffer component (8) is also provided on a side of the support plate (7) facing the heat exchange plate (6), and the buffer component (8) is in contact with the heat exchange plate (6).

10. An electrical device, characterized in that: include: A battery pack as claimed in any one of claims 1 to 9.

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