Battery, battery pack and electric device

Abstract

The utility model provides a battery, a battery pack and a power utilization device, and relates to the technical field of batteries, and the provided battery comprises a shell, a top cover, an anti-explosion valve, a motor assembly, an insulating film and a bottom supporting plate; an opening is formed in the surface of one end of the shell in the height direction, and an explosion-proof opening is formed in the surface of the other end of the shell; the top cover is used for covering the opening; the anti-explosion valve is mounted at the anti-explosion opening of the shell; the electrode assembly is arranged in the accommodating cavity; the insulating film wraps the electrode assembly; the bottom supporting plate is arranged in the containing cavity and located on the side, facing the anti-explosion valve, of the insulating film. The bottom supporting plate comprises a body and a weak part arranged on the body, and the thickness of the weak part is smaller than that of the body in the height direction. The provided battery pack comprises the battery, and the electric device comprises the battery or the battery pack. According to the battery provided by the invention, gas can be quickly guided to the anti-explosion valve when thermal runaway of the battery occurs, so that the technical effects of protecting the battery and preventing the battery from being damaged are achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a battery, a battery pack and a power utilization device. BACKGROUND

[0002] The application field of power batteries mainly includes electric vehicles, electric two-wheel vehicles, electric ships, unmanned aerial vehicles and the like. The battery pack includes a plurality of battery monomers, and each battery monomer structure mainly includes a top cover, a shell (usually an aluminum shell), an electrode assembly (usually a roll core) and an insulating film. An opening is arranged on one side surface of the shell, the electrode assembly is placed into the shell after being wrapped by the insulating film from the opening of the shell, and the top cover is used for covering and sealing the opening at the top of the shell and is welded with the shell to form a sealed whole. When the internal temperature of the power battery is too high or the pressure is too large, the battery will have an internal chemical reaction, thereby generating gas, continuously increasing the pressure in the battery and causing damage to the battery. In the most serious case, the battery may explode. To avoid such a situation, an explosion-proof valve is arranged in the power battery, and the valve is used to disperse the pressure generated in the battery to the outside, thereby ensuring the safety of the battery.

[0003] When the explosion-proof valve of the battery is installed on the top cover, double failures of electrical insulation and thermal runaway are prone to occur in the case of battery abuse or extreme conditions. With the gradual improvement of the safety performance requirements for power batteries, the design of thermal and electrical separation is becoming more and more common.

[0004] In the prior art, the common thermal and electrical separation design is to cancel the explosion-proof valve on the top cover and to arrange the explosion-proof valve at the bottom of the shell, so as to realize the function of mutual non-interference of electrical connection and thermal runaway eruption in the case of battery abuse. However, arranging the explosion-proof valve at the bottom of the shell has the following problems: the bottom of the insulating film is tightly attached to the inner surface of the shell due to the weight of the electrode assembly (roll core), which will cause the explosion-proof valve port to be blocked, affect the pressure relief function of the explosion-proof valve and exist a safety hazard. Practical new type content

[0005] The present application provides a battery, a battery pack and a power utilization device, which alleviates the technical problems in the prior art that the explosion-proof valve is arranged at the bottom of the shell of the battery monomer, the bottom of the insulating film is tightly attached to the inner surface of the shell due to the weight of the electrode assembly (roll core), the explosion-proof valve port is blocked, and the pressure relief function of the explosion-proof valve is affected, and achieves the technical effect of protecting the battery monomer.

[0006] To achieve the above object, the main technical scheme adopted by the embodiments of the present application includes:

[0007] In a first aspect, an embodiment of the present application provides a battery, which has a height direction and includes a shell, a top cover, an explosion-proof valve, a motor assembly, an insulating film and a bottom support plate; the shell has a accommodating cavity, and along the height direction, one end surface of the shell is provided with an opening, and the end surface of the shell facing away from the opening is provided with an explosion-proof opening; the top cover is used to seal the opening; the explosion-proof valve is installed in the explosion-proof opening of the shell; the electrode assembly is provided in the accommodating cavity; the insulating film is provided in the accommodating cavity and wraps the electrode assembly; the bottom support plate is provided in the accommodating cavity, and the bottom support plate is located on the side of the insulating film facing the explosion-proof valve.

[0008] The bottom supporting plate includes a main body and a weak portion provided on the main body. Along the height direction, the thickness of the weak portion is smaller than the thickness of the main body.

[0009] In the battery provided in the embodiments of the present application, providing a weak portion on the bottom support plate is equivalent to reducing the structural strength of the bottom support plate. When the battery suffers thermal failure, a large amount of high-pressure gas will impact and tear the weak portion, quickly diverting the high-pressure gas to the explosion-proof valve, thereby quickly depressurizing the battery and achieving the technical effect of protecting the battery. It should be understood that in the present application, because the weak portion is easily torn under the impact of a large amount of high-pressure gas, the crack of the torn portion can be rapidly expanded to divert the gas to the explosion-proof valve. Therefore, the weak portion has multiple specific locations on the bottom support plate that can be set, including but not limited to setting the weak portion in the central area of ​​the bottom support plate.

[0010] Optionally, the weak portion is a groove provided in the body, and along the height direction, the bottom wall thickness of the groove is T, satisfying 0.01mm≤T≤0.3mm.

[0011] Optionally, the groove is recessed from a side facing the top cover to a side facing the explosion-proof valve.

[0012] Optionally, the weak portion is a toothed cutter line provided on the bottom support plate, and the distance between each two adjacent breakpoints of the toothed cutter line is D, satisfying 0.5mm≤D≤5mm.

[0013] Optionally, the weak portion includes a groove provided in the body and a toothed line provided inside the groove; along the height direction, the bottom wall thickness of the groove is T, satisfying 0.01mm≤T≤0.3mm; the spacing between each two adjacent breakpoints of the toothed line is D, satisfying 0.5mm≤D≤5mm.

[0014] Optionally, the cross-section of the weak portion perpendicular to the height direction is in the shape of an ellipse, an X-shape, a cross-shape, an I-shape, or any one of the shapes of the explosion-proof valve.

[0015] Optionally, the weak part at least partially overlaps the explosion-proof valve in the orthographic projection on the surface of the shell on which the explosion-proof valve is located, which can reduce the flow time of the high-pressure gas, and create more favorable conditions for the high-pressure gas to be quickly sprayed from the explosion-proof valve.

[0016] Optionally, the weak part covers the entire explosion-proof valve in the orthographic projection on the surface of the shell on which the explosion-proof valve is located, or the edge of the weak part is aligned with the edge of the explosion-proof valve, or the weak part partially overlaps the explosion-proof valve in the orthographic projection on the surface of the shell on which the explosion-proof valve is located.

[0017] Optionally, part of the weak part extends to the edge of the bottom support plate, and when the bottom support plate is impacted by the high-pressure gas inside the battery, the weak part will be quickly torn from the edge of the bottom support plate to further improve the pressure relief effect.

[0018] Optionally, at least one exhaust hole is arranged on the body of the bottom support plate, so that the high-pressure gas around the electrode assembly 3 can be discharged to the explosion-proof valve through the exhaust hole, thereby assisting in accelerating the pressure relief.

[0019] Optionally, the battery further has a length direction perpendicular to the height direction, and the exhaust hole at least includes a side hole close to both ends of the length direction of the battery, so as to timely guide the gas on both sides of the electrode assembly 3 to relieve pressure.

[0020] In a second aspect, the embodiments of the present application provide a battery pack, which comprises the battery according to any one of the foregoing embodiments.

[0021] In a third aspect, the embodiments of the present application further provide a power utilization device, which comprises the battery according to any one of the foregoing first aspect or the battery pack according to the foregoing second aspect. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the description of the embodiments or the prior art. Obviously, the drawings described below are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without any creative effort.

[0023] Figure 1 The overall structure of the battery provided by the embodiments of the present application is shown in the axonometric view;

[0024] Figure 2 The overall structure of the first optional structure of the battery provided by the embodiments of the present application is shown in the exploded view;

[0025] Figure 3A schematic axonometric diagram of the overall structure of the bottom support plate in the first optional structure of the battery provided in an embodiment of the present utility model;

[0026] Figure 4 A schematic diagram of an optional structure in which the weak portion passes through the bottom support plate and a side hole is provided on the bottom support plate body in the first optional structure of the battery provided in an embodiment of the present utility model;

[0027] Figure 5 A schematic diagram of an optional structure of the first optional structure of the battery provided by an embodiment of the present utility model, in which the weak portion is a toothed knife line and a side hole is provided on the bottom support plate body;

[0028] Figure 6 A schematic diagram of an optional structure in which the cross section of the weak portion is "X"-shaped and a side hole is provided on the bottom support plate body in the first optional structure of the battery provided in an embodiment of the present utility model;

[0029] Figure 7 A schematic diagram of an optional structure in which the cross section of the weak portion of the first optional structure of the battery provided by an embodiment of the present utility model is in the shape of a cross and a side hole is provided on the bottom support plate body;

[0030] Figure 8 A schematic diagram of an optional structure in which the cross section of the weak portion of the first optional structure of the battery provided by an embodiment of the present utility model is in the shape of an "I" and a side hole is provided on the bottom support plate body;

[0031] Figure 9 for Figure 8 Based on the structure shown, a schematic diagram of an optional structure in which other exhaust holes are provided on the bottom support plate body;

[0032] Figure 10 A schematic diagram of an optional structure in which the weak portion of the battery provided in the first optional structure of the embodiment of the present utility model is shaped like an explosion-proof valve and a side hole is provided on the bottom support plate body;

[0033] Figure 11 for Figure 10 The local structural cross-section of area A in the middle;

[0034] Figure 12 A schematic diagram of an optional structure of a first optional structure of a battery provided by an embodiment of the present utility model, wherein the weak portion includes a groove and a toothed line, and a side hole is provided on the bottom support plate body;

[0035] Figure 13 for Figure 4 or Figure 10 Based on the structure shown, a schematic diagram of an optional structure in which other exhaust holes are provided on the bottom support plate body;

[0036] Figure 14The overall structure explosion schematic diagram of the second optional structure of the battery provided by the embodiment of the present application in one view;

[0037] Figure 15 The overall structure explosion schematic diagram of the second optional structure of the battery provided by the embodiment of the present application in another view;

[0038] Figure 16 The optional structure schematic diagram of the first bottom supporting plate and the second bottom supporting plate of the insulating film in the second optional structure of the battery provided by the embodiment of the present application, the opposite side edges of which are spaced apart from each other;

[0039] Figure 17 The optional structure schematic diagram of the first bottom supporting plate and the second bottom supporting plate of the insulating film in the second optional structure of the battery provided by the embodiment of the present application, the opposite side edges of which are spaced apart from each other;

[0040] Figure 18 The optional structure schematic diagram of the first bottom supporting plate and the second bottom supporting plate of the insulating film in the second optional structure of the battery provided by the embodiment of the present application, the opposite side edges of which are spaced apart from each other; Figure 17 The partial structure sectional view of the B area in the middle;

[0041] Figures 19-23 The optional structure schematic diagram of the first bottom supporting plate and the second bottom supporting plate of the insulating film in the second optional structure of the battery provided by the embodiment of the present application, the opposite side edges of which are spaced apart from each other;

[0042] Icon: 100-battery; 1-housing; 101-first end face; 11-receiving cavity; 111-opening; 112-explosion-proof opening; 2-top cover; 3-electrode assembly; 4-insulating film; 5-bottom supporting plate; 51-first bottom supporting plate; 5101-first side edge; 5101'-first lapping edge; 5102-positioning hole; 511-first edge recess; 52-second bottom supporting plate; 5201-second side edge; 5201'-second lapping edge; 5202-positioning column; 521-second edge recess; 501-weak part; 5011-first slot side edge; 5012-second slot side edge; 502-body; 503-butting weak part; 504-exhaust hole; 5041-side hole; 6-explosion-proof valve; Z-height direction; X-length direction; Y-width direction. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme of the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0044] Unless otherwise defined, all technical and scientific terms used in the present application have the same meanings as those commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the use of the terms "including," "comprising," or "having" in the description of the application herein is not intended to exclude or require the presence of any

[0045] Reference herein to an "embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive or alternative embodiments. It is expressly understood that the described embodiments of the application are merely example structures selected for the purposes of explanation to aid those of ordinary skill in the art in their understanding of the application.

[0046] In the description of the application, it is necessary to explain that, unless otherwise explicitly specified and limited, the terms "set", "install", "connect" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0047] "Multiple" appearing in the present application means more than two (including two).

[0048] In the related art, when the explosion-proof valve 6 of the power battery 100 is installed on the top cover 2, the double failure of electrical insulation and thermal runaway is prone to occur when the battery 100 is misused or in extreme cases, and as the safety performance requirements of the power battery 100 gradually increase, to avoid reducing the risk of double failure of the design scheme, the design of thermal-electric separation is becoming more and more common.

[0049] The common thermal-electric separation design is to cancel the explosion-proof valve 6 on the top cover 2, and to set the explosion-proof valve 6 at the bottom of the shell 1, so as to realize the function of mutual non-interference of electrical connection and thermal runaway eruption under the misuse of the battery 100. However, there are the following problems in setting the explosion-proof valve 6 at the bottom of the shell 1: the bottom of the insulating film 4 is tightly attached to the inner surface of the shell 1 due to the weight of the electrode assembly 3 (winding core), which will cause the explosion-proof valve 6 to be blocked, affect the pressure relief function of the explosion-proof valve 6, and exist a safety hazard.

[0050] In view of this, the present embodiment provides a battery 100, with reference to Figure 1The battery 100 has a height direction Z, a length direction X perpendicular to the height direction Z, and a width direction Y also perpendicular to the height direction Z and perpendicular to the length direction X.

[0051] Specifically, referring to Figures 1-3 and Figure 14 and Figure 15 The battery 100 includes a shell 1, a top cover 2, an explosion-proof valve 6, an electrode assembly 3, an insulating film 4, and a bottom support plate 5. The shell 1 has a receiving cavity 11, and one end surface of the shell 1 is provided with an opening 111 in the height direction Z. An end surface of the shell 1 opposite to the opening 111 is provided with an explosion-proof opening 112. The top cover 2 is used to cover and seal the opening 111 of the shell 1. The explosion-proof valve 6 is installed on the explosion-proof opening 112 of the shell 1 (the explosion-proof opening 112 is installed on the first end surface 101 of the shell 1). The electrode assembly 3 is arranged in the receiving cavity 11 of the shell 1. The insulating film 4 is arranged in the receiving cavity of the shell 1 and wraps the electrode assembly 3. The bottom support plate 5 is also arranged in the receiving cavity 11 of the shell 1, and the bottom support plate 5 is located on the side of the insulating film 4 facing the explosion-proof valve 6. The bottom support plate 5 is arranged in the shell in a direction perpendicular to the height of the shell, but the plate surface of the bottom support plate 5 does not necessarily extend in a direction perpendicular to the height of the shell, and can be parallel or slightly inclined to the inner surface of the shell where the explosion-proof valve is arranged. The bottom support plate 5 can be flat or uneven.

[0052] Further, referring to Figures 1-13 The battery 100 provided by the embodiment of the present application has a bottom support plate 5, which includes a body 502 and a weak part 501 arranged on the body 502. In the height direction Z, the thickness of the weak part 501 is smaller than the thickness of the body 502.

[0053] The battery 100 provided by the embodiment of the present application has a weak part 501 arranged on the body 502 of the bottom support plate 5, which is equivalent to reducing the structural strength of the bottom support plate 5. When the battery is in thermal failure, a large amount of high-pressure gas will impact and tear the weak part 501, quickly guiding the high-pressure gas to the explosion-proof valve, thereby quickly relieving the pressure of the battery and achieving the technical effect of protecting the battery. It should be understood that, in the present application, since the weak part 501 is easily torn under the impact of a large amount of high-pressure gas, the crack of the torn part can be quickly expanded to guide the flow to the explosion-proof valve 6. Therefore, the weak part 501 has multiple specific positions that can be arranged on the bottom support plate 5, including but not limited to arranging the weak part 501 at the center area of the plate surface of the bottom support plate 5.

[0054] In some embodiments, the weakened portion 501 is at least partially through the bottom support plate 5 in the height direction Z of the battery 100, for example, completely through to form a large hole, or first form a groove, and then form a hole or a toothed line inside the groove to form a partially through and partially not-through structure; when the battery 100 is thermally failed, a large amount of high-pressure gas can easily flow out from the through-hole area of the weakened portion 501 through the bottom support plate 5, and when the high-pressure gas flow is relatively large, the high-pressure gas can also tear the edge of the through-hole of the weakened portion 501 through the bottom support plate 5 and quickly flow out.

[0055] In some embodiments, the weakened portion 501 is not through the bottom support plate 5 in the height direction Z of the battery 100, for example, is a groove provided on the body 502; when the battery 100 is thermally failed, a large amount of high-pressure gas will impact the weakened portion 501, and since the weakened portion 501 destroys the structural integrity of the bottom support plate 5, the weakened portion 501 will be easily torn by the high-pressure gas and quickly guide the high-pressure gas to the explosion-proof valve 6.

[0056] In some embodiments of the present application, as shown in Figure 10 and Figure 11 , the weakened portion 501 is a groove, and in the height direction Z, the bottom wall thickness T of the groove (i.e., the residual thickness of the body 502 of the bottom support plate 5 at the groove) satisfies 0.01mm≤T≤0.3mm, which is a preferred size range obtained by the applicant after many tests. In the test process, the bottom support plate 5 with the same body thickness, the same groove cross-sectional shape, and different groove bottom wall thickness T is selected, and is assembled with the same shell 1, top cover 2, electrode assembly 3, and insulating film 4 to form a plurality of batteries 100, and is given the same internal pressure for pressure relief test. It is found that when T<0.01mm, the weakened portion 501 (at the groove) is torn and damaged during the process; when T>0.3mm, the weakened portion 501 (at the groove) is not easily torn under the impact of internal pressure, which will affect the pressure relief, and the preferred 0.01mm≤T≤0.3mm is the ideal thickness of the groove bottom wall.

[0057] In the above embodiments, the orientation of the groove can be positive, negative, or positive and negative staggered pressing in the height direction of the battery 100, and when the groove is recessed from the side facing the top cover 2 to the side facing the explosion-proof valve 6, it is more conducive to the flow of gas to the weakened portion 501.

[0058] In some embodiments of the present application, as shown in Figure 5As shown, the weak portion 501 is a serrated line, and the spacing between each two adjacent breakpoints of the serrated line is D, satisfying 0.5mm≤D≤5mm. The selection of this spacing is the preferred size range determined by the applicant after multiple tests. During the test, bottom support plates 5 with the same base thickness, the same weak portion 501 shape, and different adjacent breakpoint spacings D were selected and assembled with the same housing 1, top cover 2, electrode assembly 3, and insulating film 4 to form multiple batteries 100. The same internal pressure was applied and a pressure relief test was performed. The results showed that when 0.5mm≤D≤5mm; when D<0.5mm, the weak portion 501 has already torn and broken during the manufacturing process; when D>5mm, the weak portion 501 is not easily torn under the impact of internal pressure, affecting pressure relief. The preferred spacing of 0.5mm≤D≤5mm is the ideal spacing between adjacent breakpoints of the serrated line of the weak portion 501.

[0059] In some specific embodiments of the present application, Figure 12 As shown, the weak portion 501 includes a groove and a perforated line within the groove. Along the height direction Z, with the groove's bottom wall thickness T as 0.01mm≤T≤0.3mm, the spacing between adjacent breakpoints in the perforated line, D, satisfies 0.5mm≤D≤5mm. This specific embodiment combines the groove and perforated line structures, making the weak portion 501 more susceptible to tearing by high-pressure gas, further enhancing the pressure relief effect.

[0060] In the embodiment of the present application, the weak portion 501 can be an uninterrupted continuous structure or a discontinuous structure consisting of a plurality of discontinuous thin-walled areas or holes.

[0061] In the embodiment of the present application, there are a variety of optional specific shapes for the cross section of the weak portion 501 perpendicular to the height direction Z. For example, in a specific embodiment, Figure 6 As shown, the cross section of the weak portion 501 is in an "X" shape. In a specific embodiment, as shown in FIG. Figure 7 As shown, the cross section of the weak portion 501 is in the shape of a cross. In a specific embodiment, as shown in FIG. Figure 8 and Figure 9 As shown, the cross section of the weak portion 501 is in the shape of an I. Figure 4 、 Figure 10 and Figure 11 As shown, the cross section of the weak portion 501 is oval or the shape of the explosion-proof valve 6. The number of the weak portions 501 provided on the bottom supporting plate 5 can be 1, 2 or more, and this application does not impose any limitation.

[0062] In an embodiment of the present application, with respect to the specific setting position of the explosion-proof valve 6 on the bottom support plate 5, the weak portion 501 can be set at a position away from the explosion-proof valve 6, and the high-pressure gas flows out from the weak portion 501 and then flows toward the explosion-proof valve 6 along the gap between the bottom support plate 5 and the inner wall of the shell 1. Alternatively, the orthographic projection of at least a portion of the weak portion 501 on the surface of the side of the shell 1 where the explosion-proof valve 6 is provided (i.e., the first end face 101) coincides with the explosion-proof valve 6. When the orthographic projection of at least a portion of the weak portion 501 on the surface of the side of the shell 1 where the explosion-proof valve 6 is provided (i.e., the first end face 101) coincides with the explosion-proof valve 6, the circumferential flow time of the high-pressure gas can be saved, creating more favorable conditions for the high-pressure gas to be quickly ejected from the explosion-proof valve 6.

[0063] In one specific embodiment, the orthographic projection of the weak portion 501 on the surface of the housing 1 on which the explosion-proof valve 6 is provided (i.e., the first end surface 101) covers the entire explosion-proof valve 6. In one specific embodiment, the edge of the weak portion 501 is aligned with the edge of the explosion-proof valve 6 (i.e., the outer contour of the weak portion 501 is in the shape of the explosion-proof valve 6, and its orthographic projection on the surface of the housing 1 on which the explosion-proof valve 6 is provided (i.e., the first end surface 101) completely overlaps with the explosion-proof valve 6). In one specific embodiment, the orthographic projection of the weak portion 501 on the surface of the housing 1 on which the explosion-proof valve 6 is provided (i.e., the first end surface 101) partially overlaps with the explosion-proof valve 6. When the orthographic projection of the weak portion 501 on the surface of the housing 1 on which the explosion-proof valve 6 is provided (i.e., the first end surface 101) covers the entire explosion-proof valve 6, or when the edge of the weak portion 501 is aligned with the edge of the explosion-proof valve 6, the rapid diversion effect on high-pressure gas is more prominent.

[0064] In an optional embodiment of the present application, the weak portion 501 extends to the edge of the bottom support plate 5, that is, a portion of the edge of the weak portion 501 is the edge of the bottom support plate 5. In this way, when the weak portion 501 is impacted by the high-pressure gas inside the battery 100, the weak portion 501 will be quickly torn from the edge of the bottom support plate 5 to further improve the pressure relief effect. It should be understood that when the weak portion 501 is completely surrounded by the main body 502, that is, when the edges of the weak portion 501 have a relatively large structural strength, under the impact of high-pressure gas, the first rupture position can only be from the inside of the weak portion 501. Obviously, it will be easier to tear directly from the edge of the weak portion 501.

[0065] In addition, if Figure 13 As shown, in some specific embodiments, at least one exhaust hole 504 is provided on the body 502 of the bottom support plate 5, so that the high-pressure gas around the electrode assembly 3 can be discharged to the explosion-proof valve 6 through these exhaust holes 504, thereby assisting in accelerating the pressure relief. The best arrangement is to evenly distribute multiple exhaust holes 504 around the weak part 501 on the body 502 of the bottom support plate 5. Figures 4-13As shown, the exhaust holes 504 at least include side holes 5041 close to both ends of the battery 100 in the length direction X, so as to timely guide and release the gas on at least both sides of the electrode assembly 3.

[0066] In addition, in the embodiment of the present application, the bottom support plate 5 can be as follows Figures 1-13 The entire plate structure shown can also be formed by splicing two or more bottom support plates. The following provides a specific embodiment of the splicing:

[0067] Reference Figure 1 as well as Figures 14-18 , provides a battery 100, including a shell 1, a top cover 2, an explosion-proof valve 6, an electrode assembly 3, an insulating film 4 and a bottom support plate 5; the shell 1 has a accommodating cavity 11, and along the height direction Z, one end surface of the shell 1 is provided with an opening 111, and the end surface of the shell 1 facing away from the opening 111 is provided with an explosion-proof opening 112; the top cover 2 is used to cover the opening 111 of the shell 1; the explosion-proof valve 6 is installed in the explosion-proof opening 112 of the shell 1; the electrode assembly 3 and the insulating film 4 are arranged in the accommodating cavity 11 of the shell 1; the insulating film 4 wraps the electrode assembly 3; the bottom support plate 5 is also arranged in the accommodating cavity 11 of the shell 1, and the bottom support plate 5 is located on the side of the insulating film 4 facing the explosion-proof valve 6.

[0068] The bottom supporting plate 5 includes a first bottom supporting plate 51 and a second bottom supporting plate 52. The first bottom supporting plate 51 and the second bottom supporting plate 52 are arranged opposite to each other in a plane perpendicular to the height direction Z. The first bottom supporting plate 51 and the second bottom supporting plate 52 respectively include a main body 502 and a weak portion 501 provided on the main body 502. Along the height direction Z, the thickness of the weak portion 501 is less than the thickness of the main body 502. The orthographic projection of at least part of the weak portion 501 on the surface of one side of the shell 1 where the explosion-proof valve 6 is provided (i.e., the first end face 101) coincides with the explosion-proof valve 6.

[0069] The first bottom support plate 51 and the second bottom support plate 52 are provided with a weak portion 501, which is equivalent to reducing the structural strength of the two bottom support plates. Figure 19 As shown, the bottom support plate 5 is penetrated along the height direction Z of the battery 100, that is, a large through-hole structure. In other specific embodiments, the weak portion 501 partially penetrates the bottom support plate 5 and partially does not penetrate the bottom support plate 5. For example, Figure 21 As shown, a groove is first provided, and then a toothed line is provided inside the groove. In these two embodiments, when the battery 100 fails due to heat, a large amount of high-pressure gas will easily flow out from the weak portion 501. When the high-pressure gas flow rate is relatively large, it can also tear the edge of the through hole of the weak portion 501 and flow out quickly. In some specific embodiments, the weak portion 501 is as shown in FIG. Figure 20As shown, the bottom support plate 5 does not penetrate along the height direction Z of the battery 100, for example, it is a groove provided in the body 502. When the battery 100 suffers thermal failure, a large amount of high-pressure gas will impact the weak portion 501. Since the weak portion 501 destroys the structural integrity of the single bottom support plate, it will be easily torn by the impact of the high-pressure gas, thereby quickly discharging the high-pressure gas to the explosion-proof valve 6. In the embodiment of the present application, the weak portion 501 can be an uninterrupted continuous structure or a discontinuous structure composed of multiple intermittent thin-walled areas or holes.

[0070] There are many optional specific shapes for the cross section of the weak portion 501 of a single bottom support plate perpendicular to the height direction Z. For example, in a specific embodiment, Figure 19 and Figure 20 As shown, the cross section of the weak portion 501 is a "U"-shaped structure provided on a single bottom support plate. When the weak portion 501 is provided opposite to another single bottom support plate, a larger elliptical structure will be formed. In a specific embodiment, as shown in FIG. Figure 22 As shown, the cross section of the weak portion 501 is a "T"-shaped structure provided on a single bottom support plate. When the cross section is provided opposite to another single bottom support plate, if the cross section can be opposite to the weak portion 501 of the other single bottom support plate, an "I"-shaped structure will be formed. In a specific embodiment, as shown in FIG. Figure 23 As shown, the cross-section of the weak portion 501 is a "V"-shaped structure provided on a single bottom support plate. When the weak portion 501 is arranged opposite to another single bottom support plate, if it can be positioned opposite to the weak portion 501 of the other single bottom support plate, an "X"-shaped structure will be formed. The cross-section of the weak portion 501 can also be set to imitate the shape of the explosion-proof valve 6 or other shapes. The number of weak portions 501 provided on a single bottom support plate can be one, two, or more, and this application does not impose any restrictions.

[0071] The battery 100 provided in this embodiment is provided with the above-mentioned weak portion 501 , so that the flow can be diverted through the weak portion 501 , thereby allowing the battery 100 to release pressure quickly, thereby achieving the function of protecting the battery 100 .

[0072] In addition, the battery 100 provided by the embodiment has two oppositely arranged bottom supporting plates (a first bottom supporting plate 51 and a second bottom supporting plate 52), the side of the first bottom supporting plate 51 towards the second bottom supporting plate 52 is a first side edge 5101, and the side of the second bottom supporting plate 52 towards the first bottom supporting plate 51 is a second side edge 5201, so that a joint gap or gap can be formed between the first side edge 5101 of the first bottom supporting plate 51 and the second side edge 5201 of the second bottom supporting plate 52. When the battery 100 is in thermal runaway, high-pressure spewing substances are generated inside the battery 100. If the high-pressure spewing substances cannot be discharged from the explosion-proof valve 6 in time, the battery 100 may explode. The joint gap or gap formed between the first side edge 5101 of the first bottom supporting plate 51 and the second side edge 5201 of the second bottom supporting plate 52 can make a large amount of high-pressure and high-temperature gas impact the gap or gap between the first side edge 5101 of the first bottom supporting plate 51 and the second side edge 5201 of the second bottom supporting plate 52 when the battery 100 is in thermal runaway, so that the gas can be quickly guided to the explosion-proof valve 6 from the gap or gap, thereby achieving the technical effects of protecting the battery 100 and preventing the battery 100 from being damaged.

[0073] It should be understood that when the first side edge 5101 of the first bottom supporting plate 51 and the second side edge 5201 of the second bottom supporting plate 52 are spaced apart and relatively far away from each other, the gas can be quickly guided to the explosion-proof valve 6 for discharge. When the joint gap between the first side edge 5101 of the first bottom supporting plate 51 and the second side edge 5201 of the second bottom supporting plate 52 is relatively small, the gap or gap will be a weak part 501 with relatively weak strength under the impact of high-pressure gas, which will quickly expand and tear around to quickly tear a pressure relief opening, thereby guiding the gas to the explosion-proof valve 6.

[0074] In addition, it should be noted that in the embodiment, the first bottom supporting plate 51 and the second bottom supporting plate 52 are oppositely arranged in a plane perpendicular to the height direction Z, which does not mean that the respective plate surfaces of the first bottom supporting plate 51 and the second bottom supporting plate 52 must also extend along the plane perpendicular to the height direction Z. In fact, the respective plate surfaces of the first bottom supporting plate 51 and the second bottom supporting plate 52 can be parallel or slightly inclined to the inner surface of the shell 1 where the explosion-proof valve 6 is arranged, and the first bottom supporting plate 51 and the second bottom supporting plate 52 can be flat or uneven, which is not specifically limited in the present application.

[0075] In addition, the first bottom supporting plate 51 and the second bottom supporting plate 52 are oppositely arranged in a plane perpendicular to the height direction Z of the shell 1, which does not mean that the first bottom supporting plate 51 and the second bottom supporting plate 52 need to be mutually symmetrical in geometry. The shapes of the first bottom supporting plate 51 and the second bottom supporting plate 52 can be different, and the cross sections of the first side edge 5101 of the first bottom supporting plate 51 and the second side edge 5201 of the second bottom supporting plate 52 in the plane perpendicular to the height direction Z can be flush “1” shapes, or “S” shapes, “V” shapes, “C” shapes, or other arbitrary shapes.

[0076] Optionally, the first bottom support plate 51 and the second bottom support plate 52 can be arranged oppositely along the length direction X of the battery 100 or arranged oppositely along the width direction Y of the battery 100. In one specific embodiment of the present application, referring to Figure 14 , the first bottom support plate 51 and the second bottom support plate 52 are arranged oppositely along the length direction X of the battery 100; the length of the shell 1 along the length direction X is L, the length of the first bottom support plate 51 is L1, and the length of the second bottom support plate 52 is L2, which satisfy: 1mm≤L1≤L / 2, 1mm≤L2≤L / 2. Arranging the first bottom support plate 51 and the second bottom support plate 52 oppositely along the length direction X of the battery 100 is beneficial to the quick installation and positioning of the first bottom support plate 51 and the second bottom support plate 52 inside the battery 100.

[0077] In one optional embodiment of the present application, at least one exhaust hole 504 is arranged on the first bottom support plate 51 and / or the second bottom support plate 52 (and / or, the technical solutions including arranging the exhaust hole 504 on both the first bottom support plate 51 and the second bottom support plate 52, or arranging the exhaust hole 504 only on the first bottom support plate 51, or arranging the exhaust hole 504 only on the second bottom support plate 52) to assist in quickly relieving the pressure of the battery 100.

[0078] In one optional embodiment of the present application, as shown in Figure 19 and Figure 20 , the weak part 501 of the first bottom support plate 51 extends to one side edge of the first bottom support plate 51, and the weak part 501 of the second bottom support plate 52 extends to one side edge of the second bottom support plate 52. That is, part of the edge of the weak part 501 is the edge of the single bottom support plate, so that when receiving the impact of the high-pressure gas inside the battery 100, the weak part 501 will be quickly torn from the edge of the single bottom support plate to further improve the pressure relief effect. It should be understood that when the entire periphery of the weak part 501 is surrounded by the body 502, that is, the edge of the weak part 501 has a relatively large structural strength, under the impact of high-pressure gas, the first position to be broken can only be from the inside of the weak part 501, obviously, it is easier to tear directly from the edge of the weak part 501.

[0079] In one optional embodiment, as shown in Figure 19 or Figure 20 , the above-mentioned weak part 501 includes a first edge recess 511 and a second edge recess 521, the first edge recess 511 is arranged on one side edge of the first bottom support plate 51 facing the second bottom support plate 52, and the second edge recess 521 is arranged on one side edge of the second bottom support plate 52 facing the first bottom support plate 51, the first edge recess 511 and the second edge recess 521 oppositely open to form a butt-weak part 503. The first edge recess 511 and the second edge recess 521 can be as shown in Figure 19The through-hole structure shown along the height direction Z through the single bottom plate can also be, for example Figure 20 The groove structure shown along the height direction Z not through the single bottom plate, and the first edge groove 511 and the second edge groove 521 can not be limited to the "U" shape shown in the cross-sectional shape perpendicular to the height direction Z, respectively, but can also be a "C" shape, a "V" shape, a trapezoidal shape, a rectangular shape, or a triangular shape, or other optional shapes, which are not specifically limited in the present application. Figure 19 Figure 20 The groove structure shown along the height direction Z not through the single bottom plate, and the first edge groove 511 and the second edge groove 521 can not be limited to the "U" shape shown in the cross-sectional shape perpendicular to the height direction Z, respectively, but can also be a "C" shape, a "V" shape, a trapezoidal shape, a rectangular shape, or a triangular shape, or other optional shapes, which are not specifically limited in the present application.

[0080] The abutment weak part 503 can be arranged away from the explosion-proof valve 6, and the high-pressure gas flows from the weak part 501 to the explosion-proof valve 6 along the gap between the bottom plate 5 and the inner wall of the shell 1, and at least part of the abutment weak part 503 can be arranged on the surface of the shell 1 on the side of the explosion-proof valve 6, and the normal projection of the at least part of the abutment weak part 503 on the surface of the shell 1 on the side of the explosion-proof valve 6 coincides with the explosion-proof valve 6, wherein when the normal projection of the at least part of the abutment weak part 503 on the surface of the shell 1 on the side of the explosion-proof valve 6 coincides with the explosion-proof valve 6, the flow time of the high-pressure gas can be saved, and the high-pressure gas can be quickly sprayed from the explosion-proof valve 6 to create more favorable conditions.

[0081] In one specific embodiment, the normal projection of the abutment weak part 503 on the surface of the shell 1 on the side of the explosion-proof valve 6 (i.e. the first end face 101) covers the entire explosion-proof valve 6; in one specific embodiment, the edge of the abutment weak part 503 is aligned with the edge of the explosion-proof valve 6 (i.e. the normal projection of the edge of the abutment weak part 503 on the surface of the shell 1 on the side of the explosion-proof valve 6 (i.e. the first end face 101) coincides with the explosion-proof valve 6); in one specific embodiment, the normal projection of the abutment weak part 503 on the surface of the shell 1 on the side of the explosion-proof valve 6 (i.e. the first end face 101) partially coincides with the explosion-proof valve 6. When the normal projection of the abutment weak part 503 on the surface of the shell 1 on the side of the explosion-proof valve 6 (i.e. the first end face 101) covers the entire explosion-proof valve 6, or the edge of the abutment weak part 503 is aligned with the edge of the explosion-proof valve 6, the flow of the high-pressure gas is more prominent.

[0082] In one specific embodiment of the present application, the edge of the first bottom plate 51 towards the body 502 on the side of the second bottom plate 52 (i.e. the first side edge 5101) and the edge of the second bottom plate 52 towards the body 502 on the side of the first bottom plate 51 (i.e. the second side edge 5201) are flush, i.e. the abutment edges are relatively flat, similar to the flat edge structure of the "one" character.

[0083] ​In another specific embodiment of the present application, the edge of the first bottom support plate 51 towards the second bottom support plate 52 (i.e. the first side edge 5101) and the edge of the second bottom support plate 52 towards the first bottom support plate 51 (i.e. the second side edge 5201) are staggered with respect to each other. For example, as shown in Figure 17 Fig. 2, the first bottom support plate 51 and the second bottom support plate 52 are arranged opposite to each other along the length direction of the battery 100; the first edge recess 511 and the second edge recess 521 respectively comprise a first groove side edge 5011 and a second groove side edge 5012 opposite to each other along the width direction of the battery 100; along the length direction of the battery 100, the length of the first groove side edge 5011 is different from the length of the second groove side edge 5012, and the longer one of the two is the first groove side edge 5011 and the other is the second groove side edge 5012; then, the first groove side edge 5011 of the first bottom support plate 51 is opposite to the second groove side edge 5012 of the second bottom support plate 52, and the second groove side edge 5012 of the first bottom support plate 51 is opposite to the first groove side edge 5011 of the second bottom support plate 52. That is, the first side edge 5101 of the first bottom support plate 51 and the second side edge 5201 of the second bottom support plate 52 respectively comprise a long edge and a short edge, the long edge of the first bottom support plate 51 is opposite to the short edge of the second bottom support plate 52, and the short edge of the first bottom support plate 51 is opposite to the long edge of the second bottom support plate 52; in this way, when the first bottom support plate 51 and the second bottom support plate 52 are arranged opposite to each other, staggered limiting can be formed in the width direction of the battery 100, which avoids the mutual misalignment of the first bottom support plate 51 and the second bottom support plate 52, thereby avoiding affecting the mutual butt joint of the first edge recess 511 and the second edge recess 521, and ensuring the accurate alignment of the butt joint weak part 503, which plays an important role when the initial design of the butt joint weak part 503 needs to correspond to the position of the explosion-proof valve 6.

[0084] For the relative position relationship between the edge of the first bottom support plate 51 towards the second bottom support plate 52 (i.e. the first side edge 5101) and the edge of the second bottom support plate 52 towards the first bottom support plate 51 (i.e. the second side edge 5201), specifically:

[0085] In one specific embodiment of the present application, the edge of the first bottom support plate 51 towards the second bottom support plate 52 (i.e. the first side edge 5101) and the edge of the second bottom support plate 52 towards the first bottom support plate 51 (i.e. the second side edge 5201) satisfy that at least part of the two are spaced apart from each other, for example, as shown in Figure 16 Fig. 3, the first side edge 5101 and the second side edge 5201 are completely spaced apart from each other; when the battery 100 is in thermal failure, a part of the high-pressure gas can be quickly guided to the explosion-proof valve 6 through the space for exhaust, so that the battery 100 enters the pressure relief mode in time.

[0086] In one specific embodiment of the present application, the side edge of the first bottom support plate 51 facing the second bottom support plate 52 (i.e. the first side edge 5101) and the side edge of the second bottom support plate 52 facing the first bottom support plate 51 (i.e. the second side edge 5201) satisfy: at least part of the areas abut or overlap each other.

[0087] It should be understood that, in this specific embodiment, although the first side edge 5101 and the second side edge 5201 abut or overlap each other, because the first bottom support plate 51 and the second bottom support plate 52 are two different single bottom support plates separated from each other, there will still be a corresponding gap (which may be relatively small) between the two bottom support plates, which still destroys the structural strength of the overall bottom support plate composed of the two bottom support plates, and when the high-pressure gas hits the gap, it can still be quickly torn from the gap, and even if the first side edge 5101 and the second side edge 5201 are in a stacked structure of mutual overlap, it can still be torn from the upper gap to the lower gap, so whether the first bottom support plate 51 and the second bottom support plate 52 are provided with a weak portion 501 to assist pressure relief or not, at least, the gap can be torn to relieve pressure, and with the auxiliary pressure relief of the exhaust hole 504, certain pressure relief function can also be achieved.

[0088] In one specific embodiment of the present application, the first side edge 5101 and the second side edge 5201 overlap each other, wherein the side of the first bottom support plate 51 facing the second bottom support plate 52 is provided with a first overlapping edge 5101' (i.e. the first side edge 5101 as the first overlapping edge 5101'), and along the height direction Z, the thickness of the first overlapping edge 5101' is less than the thickness of the body 502 of the first bottom support plate 51; the side of the second bottom support plate 52 facing the first bottom support plate 51 is provided with a second overlapping edge 5201' (i.e. the second side edge 5201 as the second overlapping edge 5201'), and along the height direction Z, the thickness of the second overlapping edge 5201' is less than the thickness of the body 502 of the second bottom support plate 52; the first overlapping edge 5101' and the second overlapping edge 5201' overlap each other.

[0089] In this specific embodiment, by taking the first side edge 5101 as the first lap joint edge 5101', taking the second side edge 5201 as the second lap joint edge 5201', and taking the two lap joint edges as thin-walled structures, at least the following effects can be achieved: (1) the structural strength of the lap joint between the first bottom support plate 51 and the second bottom support plate 52 is reduced, so that when high-pressure gas impacts the gap between the two bottom support plates, the gap can be easily torn to release pressure; (2) the overall thickness of the lap joint between the first bottom support plate 51 and the second bottom support plate 52 is reduced, avoiding occupying too much accommodation space of the shell 1, which is conducive to reducing the external volume of the battery 100 to meet the application requirements of the battery 100 with smaller volume in more scenarios; (3) the machining precision of the length of the two bottom support plates is reduced, avoiding the problem of material waste caused by machining errors that make the length of a single bottom support plate slightly longer and unable to be installed. It should be understood that this does not mean that the embodiment in which the two bottom support plates are lap jointed can only be applied when the length of a single bottom support plate in the length direction X of the battery 100 is longer than 1 / 2 of the length of the shell. When the length of the two bottom support plates is less than or equal to 1 / 2 of the length of the shell, the lap joint scheme can still be used.

[0090] In one specific embodiment of the present application, one side edge of the first bottom support plate 51 towards the second bottom support plate 52 (i.e., the first side edge 5101) is hot melt connected with one side edge of the second bottom support plate 52 towards the first bottom support plate 51 (i.e., the second side edge 5201).

[0091] In one specific embodiment of the present application, as shown in Figure 17 and Figure 18 one side edge of the first bottom support plate 51 towards the second bottom support plate 52 (i.e., the first side edge 5101) is connected with one side edge of the second bottom support plate 52 towards the first bottom support plate 51 (i.e., the second side edge 5201) through the positioning hole 5102 provided on one of them and the positioning column 5202 provided on the other.

[0092] The embodiments of the present application also provide a battery pack, which includes the battery 100 provided by any of the preceding embodiments. The battery pack provided by the embodiments of the present application can include a box body and a plurality of battery 100 monomers arranged in the accommodation space of the box body, and a partition plate and a protection plate are installed inside the box body to protect the battery 100 monomers.

[0093] In addition, the embodiments of the present application also provide an electric device, which includes the battery 100 or the battery pack provided by any of the preceding embodiments. The electric device can be a mobile phone, a refrigerator, a vehicle, etc., which is not limited in the present application.

[0094] It should also be noted that the terms "comprising", "comprises" or other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0095] The various embodiments in the specification are described in progressive manner, and the same or similar parts between the embodiments can be mutually referred to, and each embodiment focuses on the difference from other embodiments.

[0096] The above only describes the embodiments of the present application and is not intended to limit the present application. The present application can have various modifications and changes for those skilled in the art. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

[0097] Although the embodiments of the present application are described in conjunction with the drawings, various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and changes are intended to fall within the scope of the claimed range.

Claims

1. A battery (100), wherein the battery (100) has a height direction (Z), characterized in that: The battery comprises: A shell (1) has a receiving cavity (11); along the height direction (Z), an end surface of the shell (1) is provided with an opening (111); and an end surface of the shell (1) facing away from the opening (111) is provided with an explosion-proof opening (112); A top cover (2) for covering and sealing the opening (111); An explosion-proof valve (6) is installed on the explosion-proof port (112); An electrode assembly (3) is disposed in the accommodating cavity (11); an insulating film (4), disposed in the accommodating cavity (11) and wrapping the electrode assembly (3); A bottom supporting plate (5) is provided in the accommodating cavity (11) and is located on a side of the insulating film (4) facing the explosion-proof valve (6); The bottom supporting plate (5) comprises a main body (502) and a weak portion (501) provided on the main body (502) along the height direction (Z), and the thickness of the weak portion (501) is smaller than the thickness of the main body (502).

2. The battery (100) according to claim 1, characterized in that: The weak portion (501) is a groove provided in the body (502), and along the height direction (Z), the bottom wall thickness of the groove is T, satisfying 0.01mm≤T≤0.3mm.

3. The battery (100) according to claim 2, characterized in that: The groove is recessed from the side facing the top cover (2) to the side facing the explosion-proof valve (6).

4. The battery (100) according to claim 1, characterized in that: The weak portion (501) is a toothed cutter line provided on the bottom support plate (5), and the distance between each two adjacent breakpoints of the toothed cutter line is D, satisfying 0.5 mm ≤ D ≤ 5 mm.

5. The battery (100) according to claim 1, characterized in that: The weak portion (501) comprises a groove provided in the body (502) and a toothed line provided inside the groove; along the height direction (Z), the bottom wall thickness of the groove is T, satisfying 0.01mm≤T≤0.3mm; the spacing between each two adjacent breakpoints of the toothed line is D, satisfying 0.5mm≤D≤5mm.

6. The battery (100) according to any one of claims 1 to 5, characterized in that: The cross-sectional shape of the weak portion (501) perpendicular to the height direction (Z) is any one of an ellipse, an X-shape, a cross-shape, an I-shape, or a shape similar to that of the explosion-proof valve (6).

7. The battery (100) according to any one of claims 1 to 5, characterized in that: The orthographic projection of at least part of the weak portion (501) on the surface of the housing (1) on the side where the explosion-proof valve (6) is provided coincides with the explosion-proof valve (6).

8. The battery (100) according to claim 7, characterized in that: The orthographic projection of the weak portion (501) on the surface of the side of the shell (1) where the explosion-proof valve (6) is provided covers the entire explosion-proof valve (6); or, the edge of the weak portion (501) is aligned with the edge of the explosion-proof valve (6); or, the orthographic projection of the weak portion (501) on the surface of the side of the shell (1) where the explosion-proof valve (6) is provided partially overlaps with the explosion-proof valve (6).

9. The battery (100) according to any one of claims 1 to 5, characterized in that: Part of the weak portion (501) extends to the edge of the bottom support plate (5).

10. The battery (100) according to any one of claims 1 to 5, characterized in that: At least one exhaust hole (504) is provided on the body (502) of the bottom supporting plate (5).

11. The battery (100) according to claim 10, characterized in that: The battery (100) also has a length direction (X) perpendicular to the height direction (Z), and the exhaust hole (504) at least includes side holes (5041) near both ends of the length direction (X) of the battery (100).

12. A battery pack, characterized in that: A battery (100) comprising the battery (100) according to any one of claims 1 to 11.

13. An electrical device, characterized in that: Comprising the battery (100) according to any one of claims 1 to 11 or the battery pack according to claim 12.

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