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 support plate, a battery and a first protection piece, an exhaust through hole on the support plate is covered by the first protection piece, the first protection piece is provided with a weak part which is over against the exhaust through hole, and an explosion-proof valve of the battery is over against the weak part. When a certain battery is subjected to thermal runaway, a mixture sprayed from the explosion-proof valve can break through the weak part and enter the gas collection cavity through the exhaust through holes, and the first protection piece covers other exhaust through holes, so that the first protection piece can prevent the mixture in the gas collection cavity from reversely transferring heat or flowing into other good batteries; the battery pack can effectively prevent thermal runaway from spreading; besides, the shell of the battery is provided with a mounting hole, the anti-explosion valve is arranged in the mounting hole, and an avoiding cavity is formed between the anti-explosion valve and the weak part, namely, the anti-explosion valve cannot be attached to the first protection part, and the first protection part cannot hinder the opening of the anti-explosion valve, so that the pressure of the battery can be smoothly released when the battery is in thermal runaway.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery pack and electrical equipment. Background Technology

[0002] Under stress and thermal stimulation, batteries within a battery pack can experience thermal runaway. During thermal runaway, a large mixture containing molten material at high temperatures is ejected from the explosion-proof valve, generating significant amounts of flammable gases such as methane, hydrogen, and carbon monoxide. The accumulation of these gases within the battery pack can lead to an explosion due to excessive internal pressure. Therefore, battery packs typically have interconnected vents and gas collection chambers to collect the molten material generated during thermal runaway and to expel the resulting gases outside the battery pack, preventing the spread and escalation of thermal runaway. In related battery pack technologies, a protective component is installed between the explosion-proof valve and the vent. If the explosion-proof valve is positioned close to this protective component, it can obstruct the valve's opening, making it more difficult to open and hindering pressure relief during thermal runaway. Utility Model Content

[0003] The primary objective of this invention is to provide a battery pack in which the internal battery can be depressurized smoothly during thermal runaway, and the battery pack can effectively prevent the spread of thermal runaway.

[0004] To achieve the above objectives, this utility model provides a battery pack having a first orientation, including a support plate, a battery, a first protective component, and a housing;

[0005] The support plate is connected to the box body, and the support plate divides the box body into a gas collection chamber and a receiving chamber along the first direction. The support plate has a plurality of exhaust holes that are arranged through the first direction, and the exhaust holes are connected to the gas collection chamber.

[0006] The first protective member is connected to the side of the support plate facing the accommodating cavity. The first protective member covers the exhaust vent. The first protective member has multiple weak points, and one of the weak points is directly opposite one of the exhaust vents.

[0007] The number of batteries is multiple, and the multiple batteries are disposed in the accommodating cavity, with one battery corresponding to one exhaust vent. Each battery includes a housing and an explosion-proof valve. The housing has a mounting hole located on the outer wall of the housing facing the first protective member. The explosion-proof valve is disposed in the mounting hole. In the first direction, the side of the housing facing the first protective member is located between the explosion-proof valve and the first protective member. The housing is connected to the support plate. The explosion-proof valve is directly opposite the weak part, and the explosion-proof valve and the weak part are spaced apart, forming a clearance cavity between the explosion-proof valve and the weak part.

[0008] In a specific embodiment of this utility model, the mounting hole is a stepped hole, and the mounting hole has a first hole segment and a second hole segment arranged and connected along the first direction. The second hole segment is located on the side of the first hole segment away from the support plate, and the explosion-proof valve is disposed in the second hole segment.

[0009] In a specific embodiment of this utility model, the mounting hole further has a third hole segment, the first hole segment, the second hole segment and the third hole segment are arranged and connected along the first direction, the third hole segment is located on the side of the second hole segment away from the first hole segment, and the hole diameters of the first hole segment, the second hole segment and the third hole segment decrease in that order.

[0010] In a specific embodiment of this utility model, the area of ​​the exhaust port is larger than the area of ​​the side of the explosion-proof valve facing the support plate.

[0011] In a specific embodiment of this utility model, the box body includes a bottom plate, a frame, and a cover. The bottom plate, the frame, and the cover are connected along the first direction. The support plate is connected to the frame and is located between the bottom plate and the cover. The air collection cavity is formed between the support plate and the bottom plate, and the receiving cavity is formed between the support plate and the cover.

[0012] The battery pack also includes a second protective component, which is disposed in the gas collection chamber and connected to the base plate. The exhaust vent is directly opposite the second protective component.

[0013] In a specific embodiment of this utility model, in the first direction, the orthographic projection of the explosion-proof valve on the base plate falls within the orthographic projection of the second protective member on the base plate.

[0014] In a specific embodiment of this utility model, in the first direction, the orthographic projection of the first protective member on the base plate falls within the orthographic projection of the second protective member on the base plate.

[0015] In a specific embodiment of this utility model, the battery pack further has a second direction and a third direction, wherein the first direction, the second direction and the third direction intersect each other;

[0016] Multiple batteries are arranged in a battery pack along the second direction;

[0017] The first protective component is strip-shaped, and its length direction is the same as the second direction. The first protective component is located between the battery pack and the support plate.

[0018] The battery pack further includes an adhesive layer, which is located between the battery pack and the support plate in the first direction, and the adhesive layer connects the battery pack and the support plate.

[0019] The first protective member has the adhesive layer on at least one side facing the third direction.

[0020] In a specific embodiment of this utility model, the first protective member is provided with the adhesive layer on both sides in the third-direction direction;

[0021] The battery pack also includes a spacer strip, the length direction of which is the same as the second direction. In the first direction, the spacer strip is located between the battery pack and the support plate, and both ends of the spacer strip are connected to the battery pack and the support plate respectively. In the third direction, the spacer strip is provided on both sides of the first protective member, and the spacer strip is located between the adhesive layers on both sides of the first protective member.

[0022] This utility model also proposes an electrical device, including the battery pack described above.

[0023] The present invention discloses a battery pack and electrical device, which, compared with the prior art, have the following advantages:

[0024] In this utility model, the vent holes on the support plate of the battery pack are covered by a first protective member, and the first protective member has a weak part facing the vent holes. The explosion-proof valve of the battery is facing the weak part. Thus, when a battery experiences thermal runaway, the mixture ejected from the explosion-proof valve will break through the weak part and enter the gas collection chamber through the vent holes. Since the first protective member covers the other vent holes, it can prevent the mixture in the gas collection chamber from transferring heat in the reverse direction or flowing into other good batteries. The battery pack can effectively prevent the spread of thermal runaway.

[0025] In addition, the battery casing is provided with mounting holes, and the explosion-proof valve is located in the mounting holes. In the first direction, the side of the casing facing the first protective member is located between the explosion-proof valve and the first protective member. A clearance cavity is formed between the explosion-proof valve and the weak part. That is, the explosion-proof valve will not be in contact with the first protective member, and the first protective member will not obstruct the opening of the explosion-proof valve, so that the battery can be depressurized smoothly in the event of thermal runaway. Attached Figure Description

[0026] Figure 1 This is a perspective view of the battery pack according to an embodiment of the present invention;

[0027] Figure 2 This is a perspective view of the support plate, battery, and first protective component in accordance with an embodiment of the present invention;

[0028] Figure 3 This is an exploded view of the support plate, battery, first protective component, adhesive layer and spacer strip in an embodiment of this utility model;

[0029] Figure 4 This is an embodiment of the present utility model. Figure 3 Enlarged diagram of A in the middle;

[0030] Figure 5 This is a cross-sectional schematic diagram showing the cooperation of the support plate, battery, first protective component, adhesive layer and spacer strip in an embodiment of this utility model;

[0031] Figure 6 This is an embodiment of the present utility model. Figure 5 Enlarged diagram of B in the diagram;

[0032] Figure 7 This is a cross-sectional schematic diagram of the battery according to an embodiment of the present invention.

[0033] In the diagram, Z represents the first direction; X represents the second direction; Y represents the third direction; 10 represents the housing; 10A represents the bottom plate; 10B represents the frame; 10C represents the cover; 101 represents the gas collection chamber; 102 represents the accommodating chamber; 1 represents the support plate; 103 represents the exhaust vent; 2 represents the battery; 21 represents the housing; 211 represents the mounting hole; 211A represents the first hole segment; 211B represents the second hole segment; 211C represents the third hole segment; 22 represents the explosion-proof valve; 3 represents the first protective component; 301 represents the weak point; 4 represents the second protective component; 5 represents the adhesive layer; 6 represents the spacer strip; 100 represents the clearance cavity; and 200 represents the battery pack. Detailed Implementation

[0034] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0035] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0036] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0037] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0038] In the embodiments of the application, "parallel" refers to a state in which the angle formed by two lines, a line and a surface, or a surface is -1° to 1°. "Perpendicular" refers to a state in which the angle formed by two lines, a line and a surface, or a surface is 89° to 91°. Equal distances, equal angles, or equal areas refer to a state in which the tolerance range is -1% to 1%.

[0039] This application proposes an electrical device that includes a battery pack as described below. The battery pack is used to store and output electrical energy to provide power to the electrical device, which includes, but is not limited to, electric vehicles, drones, and power banks. Since the electrical device uses the battery pack described below, it also has the advantages of the battery pack described below, which will not be elaborated further in this application.

[0040] like Figures 1 to 7 As shown, a preferred embodiment of the present invention provides a battery pack having three perpendicular directions: a first direction Z, a second direction X, and a third direction Y. The battery pack includes a support plate 1, a battery 2, a first protective member 3, and a housing 10. The support plate 1 is connected to the housing 10 and divides the housing 10 along the first direction Z to form a gas collecting chamber 101 and a receiving chamber 102. The support plate 1 has multiple exhaust holes 103 extending through the support plate 1 along the first direction Z, and the exhaust holes 103 communicate with the gas collecting chamber 101. The first protective member 3 is connected to the side of the support plate 1 facing the receiving chamber 102, and covers the exhaust holes 103. The first protective member 3 has multiple weak points 301. Furthermore, a weak point 301 is directly opposite an exhaust vent 103; there are multiple batteries 2, which are disposed in the accommodating cavity 102, and each battery 2 corresponds to an exhaust vent 103; wherein, the battery 2 includes a housing 21 and an explosion-proof valve 22, the housing 21 has a mounting hole 211, the mounting hole 211 is located on the outer wall surface of the housing 21 facing the first protective member 3, the explosion-proof valve 22 is disposed in the mounting hole 211, in the first direction Z, the side of the housing 21 facing the first protective member 3 is located between the explosion-proof valve 22 and the first protective member 3, the housing 21 is connected to the support plate 1, the explosion-proof valve 22 is directly opposite the weak point 301, and the explosion-proof valve 22 and the weak point 301 are spaced apart, and a clearance cavity 100 is formed between the explosion-proof valve 22 and the weak point 301.

[0041] In this embodiment, the housing includes a bottom plate 10A, a frame 10B, and a cover 10C. The bottom plate 10A, the frame 10B, and the cover 10C are connected along the first direction Z. A support plate 1 is connected to the frame 10B and is located between the bottom plate 10A and the cover 10C. A gas collection cavity 101 is formed between the support plate 1 and the bottom plate 10A, and a receiving cavity 102 is formed between the support plate 1 and the cover 10C. The frame 10B has an exhaust channel that communicates with the gas collection cavity 101. The battery pack exhausts the gas generated by the thermal runaway of the battery 2 through the exhaust channel. This is prior art, and this application will not elaborate further on it.

[0042] Specifically, the vent hole 103 on the support plate 1 is covered by the first protective member 3, and the first protective member 3 has a weak part 301 directly opposite the vent hole 103. The explosion-proof valve 22 of the battery 2 is directly opposite the weak part 301. Therefore, when a battery 2 experiences thermal runaway, the mixture ejected from the explosion-proof valve 22 will break through the weak part 301 and enter the gas collecting chamber 101 through the vent hole 103. Since the first protective member 3 covers the other vent holes 103, the first protective member 3 can prevent the mixture in the gas collecting chamber 101 from flowing back into the gas collecting chamber. By directing heat transfer or flowing to other batteries 2 with good heat transfer, the battery pack can effectively prevent the spread of thermal runaway. In addition, the housing 21 of the battery 2 is provided with a mounting hole 211, and the explosion-proof valve 22 is provided in the mounting hole 211. In the first direction Z, the side of the housing 21 facing the first protective member 3 is located between the explosion-proof valve 22 and the first protective member 3. A relief cavity 100 is formed between the explosion-proof valve 22 and the weak part 301. That is, the explosion-proof valve 22 will not be in contact with the first protective member 3, and the first protective member 3 will not obstruct the opening of the explosion-proof valve 22, so that the battery 2 can be depressurized smoothly in the event of thermal runaway.

[0043] The first protective component 3 is provided with grooves, which make a part of the first protective component 3 form a weak part 301; or, the first protective component 3 is provided with a plurality of through holes arranged in a circumferential direction, and the area enclosed by the through holes forms a weak part 301; the weak part 301 of the above two structures can be broken by the material ejected by the thermal runaway of the battery 2.

[0044] Preferably, the support plate 1 also has a liquid cooling channel. In this case, the support plate 1 is used as a liquid cooling plate. The support plate 1 can play a role in thermal management of the battery 2. At the same time, when the battery 2 experiences thermal runaway, the first plate can also reduce the temperature of the material ejected from the battery 2.

[0045] In this embodiment, as Figure 7 As shown, the mounting hole 211 is a stepped hole. The mounting hole 211 has a first hole section 211A and a second hole section 211B arranged and connected along the first direction Z. The second hole section 211B is located on the side of the first hole section 211A away from the support plate 1. The explosion-proof valve 22 is located in the second hole section 211B. At this time, the first hole section 211A constitutes part of the relief cavity 100. Thus, in the first direction Z, the relief cavity 100 has a large space to ensure that the explosion-proof valve 22 can open smoothly.

[0046] Furthermore, such as Figure 7As shown, the mounting hole 211 also has a third hole section 211C. The first hole section 211A, the second hole section 211B, and the third hole section 211C are arranged and connected along the first direction Z. The third hole section 211C is located on the side of the second hole section 211B away from the first hole section 211A. The diameters of the first hole section 211A, the second hole section 211B, and the third hole section 211C decrease. The third hole section 211C is connected to the inside of the housing 21. The explosion-proof valve 22 seals the second hole section 211B. At this time, the part of the housing 21 that forms the third hole section 211C forms a limiting part. The explosion-proof valve 22 is connected to the limiting part. Based on this, when assembling the explosion-proof valve 22, it is inserted into the second hole section 211B from the outside of the housing 21, which is convenient for operation.

[0047] In this application, the mounting hole 211 may also have multiple hole segments. For example, the mounting hole 211 may also include a fourth hole segment. The fourth hole segment is located on the side of the first hole segment 211A away from the second hole segment 211B, and the fourth hole segment is connected to the first hole segment 211A. In this case, the space of the clearance cavity 100 is larger in the first direction Z, which makes the explosion-proof valve 22 open more smoothly.

[0048] In this embodiment, further, such as Figure 5 As shown, the area of ​​the exhaust port 103 is larger than the area of ​​the side of the explosion-proof valve 22 facing the support plate 1. Therefore, the explosion-proof valve 22 will not be blocked by the support plate 1, and the support plate 1 will not obstruct the opening of the explosion-proof valve 22, so that the battery 2 can be depressurized smoothly in the event of thermal runaway.

[0049] In practical applications, when battery 2 experiences thermal runaway and a blowout occurs, high-temperature, high-pressure substances pass through the exhaust port 103 and enter the gas collecting chamber 101. These substances directly impact the chamber wall of the gas collecting chamber 101 opposite the exhaust port 103. Consequently, further... Figure 5 As shown, the battery pack also includes a second protective component 4, which is located within the gas collection chamber 101 and connected to the base plate 10A. The exhaust port 103 faces the second protective component 4. Therefore, after the battery 2 experiences thermal runaway, the high-temperature, high-pressure substances generated will act on the second protective component 4, preventing the base plate 10A from burning through, resulting in a high level of safety for the battery pack. Furthermore, the second protective component 4 reduces the strength and toughness requirements of the base plate 10A, facilitating material selection for the base plate 10A.

[0050] Furthermore, such as Figure 5 and Figure 6 As shown, in the first direction Z, the orthogonal projection of the explosion-proof valve 22 on the base plate 10A falls within the orthogonal projection of the second protective component 4 on the base plate 10A. Therefore, the second protective component 4 has a relatively large protection range and good protection effect.

[0051] Furthermore, such as Figure 5 and Figure 6As shown, in the first direction Z, the orthographic projection of the first protective component 3 on the base plate 10A falls within the orthographic projection of the second protective component 4 on the base plate 10A. At this time, the protection range of the second protective component 4 is larger. The second protective component 4 covers the area that will be impacted as much as possible, which can further reduce the strength and toughness requirements of the base plate 10A. Moreover, the second protective component 4 is set to be relatively larger, which will better mitigate the effects of impact and high temperature, and improve the safety of the battery pack.

[0052] In this embodiment, as Figures 1 to 4 As shown, multiple batteries 2 are arranged in a battery pack 200 along the second direction X; the first protective member 3 is strip-shaped, and the length direction of the first protective member 3 is the same as that of the second direction X. The first protective member 3 is located between the battery pack 200 and the support plate 1; the battery pack also includes an adhesive layer 5. In the first direction Z, the adhesive layer 5 is located between the battery pack 200 and the support plate 1, and the adhesive layer 5 connects the battery pack 200 and the support plate 1; the first protective member 3 has adhesive layers 5 on both sides in the third direction Y; specifically, the strip-shaped first protective member 3 has a simple structure, is easy to process, and has low cost. The advantage of connecting the battery 2 to the support plate 1 through the adhesive layer 5 is that it is easy to assemble and has high connection stability. In addition, the support plate 1 and the battery pack 200 are assembled compactly, which can reduce the space occupied by the support plate 1 and the battery pack 200 in the first direction Z, which is conducive to the compact design of the battery pack.

[0053] In other embodiments, the first protective member 3 has an adhesive layer 5 on one side in the Y direction, in which case the battery 2 can also be stably connected to the support plate 1.

[0054] Specifically, based on the strip-shaped first protective member 3, the second protective member 4 is also strip-shaped. Thus, the second protective member 4 also has the advantages of simple structure, convenient processing and low cost. Moreover, it is easy to realize the structural feature that the orthographic projection of the first protective member 3 on the base plate 10A falls within the orthographic projection of the second protective member 4 on the base plate 10A.

[0055] In this application, there can be multiple battery packs 200, and the multiple battery packs 200 are arranged along the third direction Y. In this case, the number of the first protective member 3 and the second protective member 4 are adapted to the number of battery packs 200.

[0056] Furthermore, such as Figures 3 to 6As shown, the battery pack also includes a spacer strip 6. The length direction of the spacer strip 6 is the same as the second direction X. In the first direction Z, the spacer strip 6 is located between the battery pack 200 and the support plate 1, and both ends of the spacer strip 6 are connected to the battery pack 200 and the support plate 1, respectively. In the third direction Y, spacer strips 6 are provided on both sides of the first protective member 3, and the spacer strip 6 is located between the adhesive layers 5 on both sides of the first protective member 3. Specifically, since the two ends of the spacer strip 6 in the first direction Z are connected to the battery pack 200 and the support plate 1, the thickness of the adhesive layer 5 can be limited by limiting the size of the spacer strip 6 in the first direction Z. Thus, the thickness of the adhesive layer 5 can be kept within a suitable range to ensure that the adhesive layer 5 has good adhesion. Moreover, the first protective member 3 is located between the two spacer strips 6. At this time, the spacer strip 6 can play a positioning role, which facilitates the assembly of the first protective member 3.

[0057] In this application, the first protective component 3 and the second protective component 4 are made of high-temperature resistant and insulating materials, such as mica, polypropylene, ABS plastic, polyethylene, ceramic or other materials commonly used in the art, and this application does not impose any restrictions on them.

[0058] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A battery pack having a first orientation (Z), characterized in that, It includes a support plate (1), a battery (2), a first protective component (3), and a housing (10); The support plate (1) is connected to the box (10), and the support plate (1) divides the box (10) into a gas collection chamber (101) and a receiving chamber (102) along the first direction (Z). The support plate (1) has a plurality of exhaust holes (103) through which the exhaust holes (103) are arranged along the first direction (Z). The exhaust holes (103) are connected to the gas collection chamber (101). The first protective member (3) is connected to the side of the support plate (1) facing the accommodating cavity (102), the first protective member (3) covers the exhaust hole (103), the first protective member (3) has a plurality of weak parts (301), and one of the weak parts (301) is directly opposite one of the exhaust holes (103); The number of batteries (2) is multiple, and the multiple batteries (2) are disposed in the accommodating cavity (102), and each battery (2) corresponds to one exhaust vent (103); wherein, the battery (2) includes a housing (21) and an explosion-proof valve (22), the housing (21) has a mounting hole (211), the mounting hole (211) is located on the outer wall surface of the housing (21) facing the first protective member (3), and the explosion-proof valve (22) is disposed in the mounting hole. (211) In the first direction (Z), the side of the housing (21) facing the first protective member (3) is located between the explosion-proof valve (22) and the first protective member (3). The housing (21) is connected to the support plate (1). The explosion-proof valve (22) is directly opposite the weak part (301), and the explosion-proof valve (22) and the weak part (301) are spaced apart. An avoidance cavity (100) is formed between the explosion-proof valve (22) and the weak part (301).

2. The battery pack according to claim 1, characterized in that, The mounting hole (211) is a stepped hole. The mounting hole (211) has a first hole section (211A) and a second hole section (211B) arranged and connected along the first direction (Z). The second hole section (211B) is located on the side of the first hole section (211A) away from the support plate (1). The explosion-proof valve (22) is disposed in the second hole section (211B).

3. The battery pack according to claim 2, characterized in that, The mounting hole (211) also has a third hole segment (211C), the first hole segment (211A), the second hole segment (211B) and the third hole segment (211C) are arranged and connected along the first direction (Z), the third hole segment (211C) is located on the side of the second hole segment (211B) away from the first hole segment (211A), and the diameters of the first hole segment (211A), the second hole segment (211B) and the third hole segment (211C) decrease in that order.

4. The battery pack according to claim 1, characterized in that, The area of ​​the exhaust port (103) is larger than the area of ​​the side of the explosion-proof valve (22) facing the support plate (1).

5. The battery pack according to claim 1, characterized in that, The housing (10) includes a base plate (10A), a frame (10B), and a cover (10C). The base plate (10A), the frame (10B), and the cover (10C) are connected along the first direction (Z). The support plate (1) is connected to the frame (10B). The support plate (1) is located between the base plate (10A) and the cover (10C). The air collection cavity (101) is formed between the support plate (1) and the base plate (10A). The receiving cavity (102) is formed between the support plate (1) and the cover (10C). The battery pack also includes a second protective member (4), which is disposed in the gas collection chamber (101) and connected to the base plate (10A). The exhaust vent (103) is directly opposite the second protective member (4).

6. The battery pack according to claim 5, characterized in that, In the first direction (Z), the orthographic projection of the explosion-proof valve (22) on the base plate (10A) falls within the orthographic projection of the second protective member (4) on the base plate (10A).

7. The battery pack according to claim 6, characterized in that, In the first direction (Z), the orthographic projection of the first protective member (3) on the base plate (10A) falls within the orthographic projection of the second protective member (4) on the base plate (10A).

8. The battery pack according to claim 1, characterized in that, The battery pack also has a second direction (X) and a third direction (Y), wherein the first direction (Z), the second direction (X), and the third direction (Y) intersect each other; The plurality of said batteries (2) are arranged in a battery pack (200) along the second direction (X); The first protective member (3) is strip-shaped, and the length direction of the first protective member (3) is the same as the second direction (X). The first protective member (3) is located between the battery pack (200) and the support plate (1). The battery pack also includes an adhesive layer (5), which is located between the battery pack (200) and the support plate (1) in the first direction (Z), and the adhesive layer (5) connects the battery pack (200) and the support plate (1). The first protective member (3) has the adhesive layer (5) on at least one side in the third direction (Y).

9. The battery pack according to claim 8, characterized in that, The first protective component (3) has adhesive layers (5) on both sides in the third direction (Y); The battery pack also includes a spacer strip (6), the length direction of which is the same as the second direction (X). In the first direction (Z), the spacer strip (6) is located between the battery pack (200) and the support plate (1), and the two ends of the spacer strip (6) are respectively connected to the battery pack (200) and the support plate (1). In the third direction (Y), the spacer strip (6) is provided on both sides of the first protective member (3), and the spacer strip (6) is located between the adhesive layers (5) on both sides of the first protective member (3).

10. An electrical appliance, characterized in that, Includes the battery pack as described in any one of claims 1-9.

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