Battery pack and electric equipment

Abstract

The utility model relates to the technical field of batteries, and discloses a battery pack and electric equipment, the battery pack comprises a cover plate, a frame, a bottom plate, a heat management plate and an exhaust plate; the bottom plate, the frame and the cover plate are connected along a first direction; the heat management plate and the exhaust plate are both arranged between the bottom plate and the cover plate, the heat management plate and the exhaust plate are both connected with the frame, the heat management plate and the exhaust plate are connected in the second direction, the heat management plate is provided with an exhaust hole penetrating in the first direction, and the exhaust plate is provided with a pressure relief area; the frame has an exhaust channel; wherein a gas collection cavity is formed among the heat management plate, the exhaust plate and the bottom plate, the exhaust hole and the pressure relief area are communicated with the gas collection cavity, the gas collection cavity is communicated with the exhaust channel through the pressure relief area, and the pressure relief area is arranged on the exhaust plate instead of the heat management plate, so that the processing difficulty of the heat management plate can be reduced, and the integrity of the heat management plate is kept; the overall strength of the heat management plate is ensured, and the structural reliability of the battery pack is high.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery pack and electrical equipment. Background Art

[0002] Under the action of stress and heat stimulation, the batteries in the battery pack will experience thermal runaway. When the batteries experience thermal runaway, a large amount of mixture will be ejected from the explosion-proof valve, which is mixed with high-temperature molten substances and will produce a large amount of high-temperature flammable gases such as methane, hydrogen, carbon monoxide, etc. A large amount of such high-temperature flammable gases will accumulate in the battery pack, which will cause the battery pack to explode due to excessive internal pressure. Therefore, the battery pack needs to construct an effective exhaust path to discharge the high-temperature gas generated by the thermal runaway of the battery to the outside of the battery pack to ensure the safety of the battery pack; in the related art, the exhaust path of the battery pack is composed of a base plate, a liquid cooling plate and a frame, wherein a collection is formed between the base plate and the liquid cooling plate. Air cavity, the edge where the liquid cooling plate is connected to the frame is provided with an air leakage hole, an exhaust channel is formed in the frame, and the air collecting cavity is connected to the exhaust channel through the air leakage hole to form an exhaust path. However, since there is a liquid cooling flow channel in the liquid cooling plate, and the edge where the liquid cooling plate is connected to the frame is the gathering place of the liquid cooling flow channels, the density of the liquid cooling flow channels there is greater than that in the middle area of ​​the liquid cooling plate. Therefore, an air leakage hole is opened at the edge where the liquid cooling plate is connected to the frame. The air leakage hole needs to be staggered with the liquid cooling flow channel, which is difficult to process. In addition, opening an air leakage hole between dense liquid cooling flow channels will reduce the strength of the liquid cooling plate to a certain extent, thereby reducing the structural reliability of the battery pack. Utility Model Content

[0003] The primary purpose of the present invention is to provide a battery pack with relatively high structural reliability.

[0004] To achieve the above-mentioned object, the present invention provides a battery pack having a first direction and a second direction intersecting each other, comprising a cover plate, a frame, a bottom plate, a thermal management plate, an exhaust plate, and a battery;

[0005] The bottom plate, the frame, and the cover plate are connected along the first direction;

[0006] The heat management plate and the exhaust plate are both arranged between the bottom plate and the cover plate, and are both connected to the frame. The heat management plate and the exhaust plate are connected along the second direction. The heat management plate has an exhaust hole passing through along the first direction, and the exhaust plate has a pressure relief area.

[0007] The frame has an exhaust channel;

[0008] A receiving cavity is formed between the heat management plate and the cover plate, and the battery is arranged in the receiving cavity; a gas collecting cavity is formed between the heat management plate, the exhaust plate and the bottom plate, the exhaust hole and the pressure relief area are both connected to the gas collecting cavity, and the gas collecting cavity is connected to the exhaust channel through the pressure relief area.

[0009] In a specific embodiment of the present invention, the frame includes an exhaust beam, and a side of the exhaust beam facing away from the bottom plate is connected to the cover plate;

[0010] The exhaust beam has a first connecting surface and a second connecting surface, the first connecting surface and the second connecting surface are both provided on the side of the exhaust beam facing the bottom plate, and the second connecting surface is located on the side of the first connecting surface close to the accommodating cavity;

[0011] The exhaust beam has the exhaust channel, the air inlet of the exhaust channel is located on the second connecting surface, and the air outlet of the exhaust channel is located on the surface of the exhaust beam facing away from the accommodating cavity;

[0012] The first connecting surface is connected to the bottom plate, and the second connecting surface is connected to a side of the heat management plate facing away from the bottom plate and a side of the exhaust plate facing away from the bottom plate;

[0013] The pressure relief area penetrates the exhaust plate along the first direction, and the pressure relief area corresponds to the air inlet of the exhaust channel.

[0014] In a specific embodiment of the present invention, the frame includes an exhaust beam, and a side of the exhaust beam facing away from the bottom plate is connected to the cover plate;

[0015] The exhaust beam has a first connecting surface and a second connecting surface, the first connecting surface and the second connecting surface are both provided on the side of the exhaust beam facing the bottom plate, and the second connecting surface is located on the side of the first connecting surface close to the accommodating cavity;

[0016] The exhaust beam has the exhaust channel, the air inlet of the exhaust channel is located on the second connecting surface, and the air outlet of the exhaust channel is located on the surface of the exhaust beam facing away from the accommodating cavity;

[0017] The pressure relief area is a through hole that passes through the exhaust plate along the first direction, and the pressure relief area corresponds to the air inlet of the exhaust channel;

[0018] The first connecting surface is connected to the bottom plate;

[0019] in,

[0020] The second connecting surface is connected to a surface of the heat management plate facing away from the bottom plate;

[0021] or,

[0022] The second connecting surface is connected to a surface of the exhaust plate facing away from the bottom plate.

[0023] In a specific embodiment of the present invention, the exhaust beam further has a third connecting surface, the third connecting surface faces the side where the heat management plate is located, and the third connecting surface connects the first connecting surface and the second connecting surface;

[0024] In the second direction, an end surface of the exhaust plate facing away from the heat management plate is connected to the third connection surface.

[0025] In a specific embodiment of the present invention, the exhaust beam includes a beam body, a connecting plate, and an exhaust seat, wherein the connecting plate is connected to a side of the beam body facing the accommodating cavity, the beam body has the first connecting surface and the third connecting surface, the connecting plate has the second connecting surface, and one end of the exhaust seat is connected to an end of the connecting plate away from the bottom plate, and the other end is connected to a side of the connecting plate close to the accommodating cavity;

[0026] The connecting plate, the exhaust seat and the beam body form the exhaust channel, and the air outlet of the exhaust channel is located on a surface of the beam body facing away from the heat management plate.

[0027] In a specific embodiment of the present invention, the bottom plate includes a plate body and a connection frame. In the first direction, one end of the connection frame is connected to the frame, and the other end is connected to the plate body.

[0028] In a specific embodiment of the present invention, there are multiple batteries, each of which includes a first explosion-proof valve. The battery is arranged in the accommodating cavity, multiple batteries are connected to the thermal management plate, and there are multiple exhaust holes, and the first explosion-proof valve corresponds to the exhaust holes one by one.

[0029] In a specific embodiment of the present invention, the battery pack further includes a spacer having a weak portion, and the spacer is provided between each of the batteries and the thermal management plate, wherein the spacer covers the exhaust hole, and the weak portion faces the first explosion-proof valve.

[0030] In a specific embodiment of the present invention, the battery pack further includes a second explosion-proof valve, which is connected to the frame and seals the air outlet of the exhaust channel.

[0031] The present invention also provides an electrical device, comprising the battery pack as described above.

[0032] The battery pack and electrical equipment of the present invention have the following advantages compared with the prior art:

[0033] In the battery pack of the present invention, the thermal management plate and the exhaust plate are connected along the second direction, and an air collecting cavity is formed between the thermal management plate, the exhaust plate and the bottom plate. The thermal management plate has an exhaust hole connected to the air collecting cavity, and the exhaust plate has a pressure relief area, the frame has an exhaust channel, and the air collecting cavity is connected to the exhaust channel through the pressure relief area, wherein the exhaust hole, the air collecting cavity, the pressure relief area, and the exhaust channel constitute the exhaust path of the battery pack. Since the pressure relief area is provided on the exhaust plate instead of the thermal management plate, the processing difficulty of the thermal management plate can be reduced, the integrity of the thermal management plate can be maintained, the overall strength of the thermal management plate can be ensured, and the structural reliability of the battery pack is relatively high. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is an exploded view of a battery pack according to an embodiment of the present invention;

[0035] Figure 2 This is an embodiment of the utility model Figure 1 A is an enlarged schematic diagram;

[0036] Figure 3 This is a structural diagram of a battery according to an embodiment of the present utility model;

[0037] Figure 4 This is a first structural diagram of the combination of the cover plate, frame, bottom plate, thermal management plate, exhaust plate, battery and second explosion-proof valve in the embodiment of the utility model;

[0038] Figure 5 This is a second structural diagram of the combination of the cover plate, frame, bottom plate, thermal management plate, exhaust plate, battery and second explosion-proof valve in an embodiment of the present invention.

[0039] In the figure, Z, first direction; X, second direction; 1, cover plate; 2, frame; 21, exhaust beam; 201, exhaust channel; 202, first connecting surface; 203, second connecting surface; 204, third connecting surface; 211, beam body; 212, connecting plate; 213, exhaust seat; 3, bottom plate; 31, plate body; 32, connecting frame; 4, thermal management plate; 401, exhaust hole; 5, exhaust plate; 501, pressure relief area; 6, battery; 61, first explosion-proof valve; 7, diaphragm; 71, weak part; 8, second explosion-proof valve; 10, gas collecting cavity; 20, accommodating cavity. DETAILED DESCRIPTION

[0040] The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0041] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, the meaning of "multiple" refers to two or more, unless otherwise clearly and specifically defined.

[0042] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections, direct connections, or indirect connections through an intermediate medium; they can refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0043] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0044] In the examples, "parallel" refers to the state where the angle formed between two lines, between a line and a plane, or between two planes is between -1° and 1°. Furthermore, "perpendicular" refers to the state where the angle formed between two lines, between a line and a plane, or between two planes is between 89° and 91°. Equal distances, equal angles, or equal areas refer to the state where the tolerance range is between -1% and 1%.

[0045] The present application proposes an electrical device, which includes a battery pack as described below, wherein the battery pack is used to store and output electrical energy to provide power for the electrical device, and the electrical device includes but is not limited to electric vehicles, drones, mobile power supplies, etc.; since the electrical device adopts the battery pack described below, the electrical device also has the advantages of the battery pack described below, and the present application does not elaborate on this.

[0046] like Figures 1 to 5 As shown, a battery pack according to a preferred embodiment of the present invention has a first direction Z and a second direction X perpendicular to each other, and includes a cover plate 1, a frame 2, a bottom plate 3, a heat management plate 4, an exhaust plate 5 and a battery 6; the bottom plate 3, the frame 2 and the cover plate 1 are connected along the first direction Z; the heat management plate 4 and the exhaust plate 5 are both arranged between the bottom plate 3 and the cover plate 1, and the heat management plate 4 and the exhaust plate 5 are both connected to the frame 2, and the heat management plate 4 and the exhaust plate 5 are connected along the second direction X, the heat management plate 4 has an exhaust hole 401 passing through along the first direction Z, and the exhaust plate 5 has a pressure relief area 501; the frame 2 has an exhaust channel 201; wherein, a accommodating cavity 20 is formed between the heat management plate 4 and the cover plate 1, and the battery 6 is arranged in the accommodating cavity 20; a gas collecting cavity 10 is formed between the heat management plate 4, the exhaust plate 5 and the bottom plate 3, the exhaust hole 401 and the pressure relief area 501 are both connected to the gas collecting cavity 10, and the gas collecting cavity 10 is connected to the exhaust channel 201 through the pressure relief area 501.

[0047] Specifically, the thermal management plate 4 and the exhaust plate 5 are connected along the second direction X, and an air collecting cavity 10 is formed between the thermal management plate 4, the exhaust plate 5 and the bottom plate 3. The thermal management plate 4 has an exhaust hole 401 connected to the air collecting cavity 10, and the exhaust plate 5 has a pressure relief area 501. The frame 2 has an exhaust channel 201, and the air collecting cavity 10 is connected to the exhaust channel 201 through the pressure relief area 501. Among them, the exhaust hole 401, the air collecting cavity 10, the pressure relief area 501, and the exhaust channel 201 constitute the exhaust path of the battery pack. Since the pressure relief area 501 is provided on the exhaust plate 5 instead of the thermal management plate 4, the processing difficulty of the thermal management plate 4 can be reduced, the integrity of the thermal management plate 4 can be maintained, the overall strength of the thermal management plate 4 can be ensured, and the structural reliability of the battery pack is relatively high.

[0048] In the present application, the frame 2 is formed by connecting at least three side beams. As one of the implementation methods of the present application, the frame 2 includes four side beams, and the four side beams are connected to form a rectangular frame 2. At this time, the battery pack is a rectangular parallelepiped.

[0049] The thermal management plate 4 has a flow channel. The function of the thermal management plate 4 is to perform thermal management on the battery 6. For example, by introducing a circulating coolant into the flow channel to take away the heat generated by the battery 6, the heat generated by the battery 6 is cooled. This is a prior art and this application will not elaborate on it in detail.

[0050] like Figure 4 As shown, the frame 2 includes an exhaust beam 21, and the exhaust beam 21 is connected to the cover plate 1 on one side facing away from the bottom plate 3; the exhaust beam 21 is one of the side beams of the frame 2, and the exhaust beam 21 has a first connecting surface 202 and a second connecting surface 203, and the first connecting surface 202 and the second connecting surface 203 are both arranged on the side of the exhaust beam 21 facing the bottom plate 3, and the second connecting surface 203 is located on the side of the first connecting surface 202 close to the accommodating cavity 20; the exhaust beam 21 has an exhaust channel 201, and the air inlet of the exhaust channel 201 is located on the second connecting surface 203, and the air outlet of the exhaust channel 201 is located on the exhaust beam 21 facing away from the accommodating cavity 20 on one side; the first connecting surface 202 is connected to the bottom plate 3, and the second connecting surface 203 is connected to the side of the heat management plate 4 facing away from the bottom plate 3 and the side of the exhaust plate 5 facing away from the bottom plate 3; wherein, the pressure relief area 501 is a through hole penetrating the exhaust plate 5 along the first direction Z, and the pressure relief area 501 is opposite to the air inlet of the exhaust channel 201; specifically, since the second connecting surface 203 is connected to the heat management plate 4 and the exhaust plate 5, that is, the connection between the heat management plate 4 and the exhaust plate 5 is also connected to the second connecting surface 203, thereby, the connection strength between the heat management plate 4 and the exhaust plate 5 can be improved, so that the battery pack has higher structural reliability.

[0051] In addition, since the second connecting surface 203 is facing the side where the bottom plate 3 is located, the second connecting surface 203 can play a role in limiting the exhaust plate 5 and the thermal management plate 4. In actual application, the gas generated by the thermal runaway of the battery 6 will enter the exhaust channel 201 from the pressure relief hole. As a result, the thermal management plate 4 and the exhaust plate 5 will be affected by the gas pressure. The exhaust plate 5 and the thermal management plate 4 are connected by the second connecting surface 203. The thermal management plate 4 and the exhaust plate 5 will not move back to the bottom plate 3 due to the action of the gas pressure. The installation stability of the thermal management plate 4 and the exhaust plate 5 is high, which can further improve the structural reliability of the battery pack.

[0052] In other embodiments, the second connection surface 203 is connected to the side of the heat management plate 4 facing away from the base plate 3, or the second connection surface 203 is connected to the side of the exhaust plate 5 facing away from the base plate 3, which can stably connect the heat management plate 4 or the exhaust plate 5. This application does not impose any restrictions on this.

[0053] Regarding the pressure relief zone 501, in some embodiments, the end of the exhaust plate 5 facing the exhaust beam 21 has a gap with the third connecting surface 204 described below, and the gap is opposite to the air inlet of the exhaust channel 201. Based on this, the gas collecting cavity 10 can also be connected to the exhaust channel 201; in other embodiments, the end of the exhaust plate 5 facing the exhaust beam 21 has a notch, and the notch passes through the exhaust plate 5 along the first direction Z. The notch constitutes the pressure relief zone 501, and the notch is opposite to the air inlet of the exhaust channel 201. Based on this, the gas collecting cavity 10 can also be connected to the exhaust channel 201.

[0054] Further, such as Figure 4 As shown, the exhaust beam 21 further has a third connecting surface 204, which faces the side where the heat management plate 4 is located, and the third connecting surface 204 connects the first connecting surface 202 and the second connecting surface 203; in the second direction X, the end surface of the exhaust plate 5 facing away from the heat management plate 4 is connected to the third connecting surface 204, that is, the exhaust plate 5 is connected to the exhaust beam 21 in both the first direction Z and the second direction X. As a result, the exhaust plate 5 has a larger connection area for connecting with the exhaust beam 21, and the installation stability of the exhaust plate 5 is higher, which can further improve the structural reliability of the battery pack.

[0055] Optionally, the exhaust beam 21 is in the shape of a rectangular parallelepiped as a whole, which has a simple structure and is easy to process.

[0056] In other embodiments, Figure 5 As shown, the exhaust beam 21 includes a beam body 211, a connecting plate 212 and an exhaust seat 213. The connecting plate 212 is connected to the side of the beam body 211 facing the accommodating cavity 20. The beam body 211 has a first connecting surface 202 and a third connecting surface 204. The connecting plate 212 has a second connecting surface 203. The exhaust seat 213 is provided on the side of the connecting plate 212 away from the bottom plate 3, and one end of the exhaust seat 213 is connected to the end of the connecting plate 212 away from the bottom plate 3, and the other end is connected to the side of the beam body 211 close to the accommodating cavity 20; wherein, the connecting plate 212, the exhaust seat 213 and the beam body 211 The exhaust channel 201 is enclosed, and the air outlet of the exhaust channel 201 is located on the side of the beam body 211 facing away from the heat management plate 4; at this time, the beam body 211 is a rectangular parallelepiped as a whole. The advantage of this structure is that by forming an exhaust cavity in the exhaust seat 213 and the beam body 211, the thickness of the beam body 211 can be reduced as much as possible while ensuring the strength of the exhaust beam 21, and it will not affect the construction of the exhaust cavity, so that the exhaust cavity still has enough space for exhaust, which not only ensures the strength of the exhaust beam 21, but also reduces the weight of the exhaust beam 21, which is beneficial to the lightweight design of the battery pack.

[0057] In the present application, the heat management plate 4 and the exhaust plate 5 are fixedly connected by gluing or riveting, which has a simple structure, is easy to process and has high connection stability.

[0058] In this application, if Figure 4 and Figure 5As shown, the base plate 3 includes a plate body 31 and a connecting frame 32. In the first direction Z, one end of the connecting frame 32 is connected to the frame 2, and the other end is connected to the plate body 31. The advantage of this structure of the base plate 3 is that the plate body 31 and the connecting frame 32 form a gas collecting groove, and the gas collecting cavity 10 is constructed by the gas collecting groove and the thermal management plate 4 and the exhaust plate 5. Compared with the flat base plate 3, it can increase the space of the gas collecting cavity 10, so that the gas collecting cavity 10 has a larger capacity, which is conducive to the reasonable construction of the exhaust path; of course, the present application does not exclude the base plate 3 from being flat, and it only needs to meet the exhaust requirements of the battery pack, and the present application does not impose any restrictions on this.

[0059] In this application, if Figure 3 and Figure 4 As shown, there are multiple batteries 6, and multiple batteries 6 are arranged in an array to form a rectangular battery pack. The battery 6 includes a first explosion-proof valve 61. The battery 6 is arranged in the accommodating cavity 20. The multiple batteries 6 are connected to the thermal management plate 4. There are multiple exhaust holes 401, and the first explosion-proof valve 61 corresponds to the exhaust holes 401 one by one. Specifically, the first explosion-proof valve 61 of the battery 6 is set back to the cover plate 1. When a battery pack with this structure is applied to an electric vehicle, the first explosion-proof valve 61 is back to the passenger compartment. Therefore, if the battery 6 thermally runs away, the first explosion-proof valve 61 sprays the mixture back to the passenger compartment, which can reduce the impact on the passenger compartment.

[0060] Among them, such as Figure 1 and Figure 2 As shown, the battery pack also includes a spacer 7, which has a weak portion 71. A spacer 7 is provided between each battery 6 and the thermal management plate 4, wherein the spacer 7 covers the exhaust hole 401, and the weak portion 71 is opposite the first explosion-proof valve 61; specifically, the material of the spacer 7 can be an insulating material or a high-temperature resistant material such as mica, polypropylene, polyethylene, ABS plastic, ceramic sheet, etc., and this application is not limited thereto. In actual application, when the battery 6 thermally runs away, the mixed substance ejected from the first explosion-proof valve 61 will break through the above-mentioned weak portion 71, and then enter the gas collecting cavity 10 through the corresponding exhaust hole 401, wherein the function of the spacer 7 is to prevent the mixed substance generated by the thermal runaway of the battery 6 from affecting the adjacent normal battery 6 from the adjacent exhaust hole 401 after entering the gas collecting cavity 10, thereby preventing the thermal runaway from spreading.

[0061] In some embodiments, the weak portion 71 may be a notch, where the strength of the notch is relatively low and is easily broken; in other embodiments, such as Figure 2As shown, the spacer 7 has a plurality of through holes, which are arranged around the center of the spacer 7. The provision of the through holes weakens the strength of the central area of ​​the spacer 7, so that the central area of ​​the spacer 7 forms the above-mentioned weak portion 71. The mixed material ejected by the thermal runaway of the battery 6 will disconnect the position between two adjacent through holes in the spacer 7. As a result, the mixed material can smoothly pass through the weak portion 71 and the exhaust hole 401 into the gas collecting cavity 10.

[0062] In this application, if Figure 4 and Figure 5 As shown, the battery pack also includes a second explosion-proof valve 8, which is connected to the frame 2 and seals the air outlet of the exhaust channel 201. Therefore, when the battery 6 thermally runs away, it ejects combustible gas at the first explosion-proof valve 61. The combustible gas enters the gas collecting cavity 10 through the exhaust hole 401, and then enters the exhaust channel 201 through the pressure relief area 501 and breaks open the second explosion-proof valve 8 to be discharged outside the battery pack, which can effectively prevent gas from accumulating in the battery pack.

[0063] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and replacements can be made without departing from the technical principles of the present invention. These improvements and replacements should also be regarded as the scope of protection of the present invention.

Claims

1. A battery pack having a first direction (Z) and a second direction (X) intersecting each other, characterized in that: It comprises a cover plate (1), a frame (2), a bottom plate (3), a heat management plate (4), an exhaust plate (5) and a battery (6); The bottom plate (3), the frame (2), and the cover plate (1) are connected along the first direction (Z); The heat management plate (4) and the exhaust plate (5) are both arranged between the bottom plate (3) and the cover plate (1); the heat management plate (4) and the exhaust plate (5) are both connected to the frame (2); and the heat management plate (4) and the exhaust plate (5) are connected along the second direction (X); the heat management plate (4) has an exhaust hole (401) penetrating along the first direction (Z); and the exhaust plate (5) has a pressure relief area (501); The frame (2) has an exhaust channel (201); A receiving cavity (20) is formed between the heat management plate (4) and the cover plate (1), and the battery (6) is arranged in the receiving cavity (20); a gas collecting cavity (10) is formed between the heat management plate (4), the exhaust plate (5) and the bottom plate (3); the exhaust hole (401) and the pressure relief area (501) are both connected to the gas collecting cavity (10), and the gas collecting cavity (10) is connected to the exhaust channel (201) through the pressure relief area (501).

2. The battery pack according to claim 1, wherein: The frame (2) comprises an exhaust beam (21), and the exhaust beam (21) is connected to the cover plate (1) on a side facing away from the bottom plate (3); The exhaust beam (21) has a first connecting surface (202) and a second connecting surface (203), the first connecting surface (202) and the second connecting surface (203) are both provided on the side of the exhaust beam (21) facing the bottom plate (3), and the second connecting surface (203) is located on a side of the first connecting surface (202) close to the accommodating cavity (20); The exhaust beam (21) has the exhaust channel (201), the air inlet of the exhaust channel (201) is located on the second connecting surface (203), and the air outlet of the exhaust channel (201) is located on a surface of the exhaust beam (21) facing away from the accommodating cavity (20); The first connecting surface (202) is connected to the base plate (3), and the second connecting surface (203) is connected to a side of the heat management plate (4) facing away from the base plate (3) and a side of the exhaust plate (5) facing away from the base plate (3); The pressure relief area (501) is a through hole that penetrates the exhaust plate (5) along the first direction (Z), and the pressure relief area (501) corresponds to the air inlet of the exhaust channel (201).

3. The battery pack according to claim 1, wherein: The frame (2) comprises an exhaust beam (21), and the exhaust beam (21) is connected to the cover plate (1) on a side facing away from the bottom plate (3); The exhaust beam (21) has a first connecting surface (202) and a second connecting surface (203), the first connecting surface (202) and the second connecting surface (203) are both provided on the side of the exhaust beam (21) facing the bottom plate (3), and the second connecting surface (203) is located on a side of the first connecting surface (202) close to the accommodating cavity (20); The exhaust beam (21) has the exhaust channel (201), the air inlet of the exhaust channel (201) is located on the second connecting surface (203), and the air outlet of the exhaust channel (201) is located on a surface of the exhaust beam (21) facing away from the accommodating cavity (20); The pressure relief area (501) is a through hole that penetrates the exhaust plate (5) along the first direction (Z), and the pressure relief area (501) corresponds to the air inlet of the exhaust channel (201); The first connecting surface (202) is connected to the bottom plate (3); in, The second connecting surface (203) is connected to a surface of the heat management plate (4) facing away from the bottom plate (3); or, The second connecting surface (203) is connected to a surface of the exhaust plate (5) facing away from the bottom plate (3).

4. The battery pack according to claim 2, wherein: The exhaust beam (21) further has a third connecting surface (204), the third connecting surface (204) faces the side where the heat management plate (4) is located, and the third connecting surface (204) connects the first connecting surface (202) and the second connecting surface (203); In the second direction (X), the end surface of the exhaust plate (5) facing away from the heat management plate (4) is connected to the third connection surface (204).

5. The battery pack according to claim 4, characterized in that: The exhaust beam (21) comprises a beam body (211), a connecting plate (212) and an exhaust seat (213); the connecting plate (212) is connected to a side of the beam body (211) facing the accommodating cavity (20); the beam body (211) has the first connecting surface (202) and the third connecting surface (204); the connecting plate (212) has the second connecting surface (203); one end of the exhaust seat (213) is connected to an end of the connecting plate (212) away from the bottom plate (3), and the other end is connected to a side of the beam body (211) close to the accommodating cavity (20); The connecting plate (212), the exhaust seat (213) and the beam body (211) enclose the exhaust channel (201), and the air outlet of the exhaust channel (201) is located on a surface of the beam body (211) facing away from the heat management plate (4).

6. The battery pack according to claim 1, wherein: The bottom plate (3) comprises a plate body (31) and a connection frame (32). In the first direction (Z), one end of the connection frame (32) is connected to the frame (2), and the other end is connected to the plate body (31).

7. The battery pack according to claim 1, wherein: There are multiple batteries (6), each of which includes a first explosion-proof valve (61). Multiple batteries (6) are connected to the heat management plate (4). There are multiple exhaust holes (401), and the first explosion-proof valve (61) corresponds to the exhaust holes (401) in a one-to-one manner.

8. The battery pack according to claim 7, characterized in that: The battery pack further comprises a spacer (7), the spacer (7) having a weak portion (71), and the spacer (7) is provided between each battery (6) and the thermal management plate (4), wherein the spacer (7) covers the exhaust hole (401), and the weak portion (71) faces the first explosion-proof valve (61).

9. The battery pack according to claim 1, wherein: The battery pack further comprises a second explosion-proof valve (8), which is connected to the frame (2) and seals the air outlet of the exhaust channel (201).

10. An electrical device, characterized in that: Comprising a battery pack as described in any one of claims 1-9.

Images