Battery and electric device

Abstract

The invention relates to a battery and an electric device. The battery comprises a shell, a battery cell, an anti-explosion valve and an insulating part, and the shell is provided with a first through hole; the battery cell is accommodated in the shell, and the anti-explosion valve is connected to the shell and corresponds to the first through hole in position; the insulating part is located between the anti-explosion valve and the battery cell, the insulating part is provided with a first protrusion protruding towards the anti-explosion valve, and a first gap exists between the first protrusion and the anti-explosion valve. The battery can provide a certain deformation space for the explosion-proof valve, and the first bulge can support the deformed explosion-proof valve, so that the sinking problem of the explosion-proof valve caused by negative pressure is greatly reduced, the durability of the explosion-proof valve is further improved, and the safety of the battery is improved.

Description

Technical Field

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

[0002] The secondary battery housing includes a shell and a top cover assembly. The electric energy of the electrode assembly is led out from the inside of the battery cell through the pole of the top cover assembly. The existing top cover assembly usually has an explosion-proof valve, which is used to discharge the gas and heat inside the battery cell in time in the event of thermal runaway of the battery cell to prevent the accumulation of gas pressure and heat inside the battery cell from causing the battery cell to explode.

[0003] At present, explosion-proof valves are usually made of thinner metal materials. Due to the thin material, the negative pressure during the production process of the battery cell and the negative pressure generated by charging and discharging during use will cause the explosion-proof valve to concave and deform, affecting the normal blasting performance of the explosion-proof valve and further affecting the safety performance of the battery cell. Summary of the invention

[0004] In view of this, embodiments of the present application provide a battery and an electrical device to solve at least one problem existing in the background technology.

[0005] In a first aspect, an embodiment of the present application provides a battery, the battery comprising: The housing is provided with a first through hole; A battery cell, housed in the housing; An explosion-proof valve, connected to the housing and corresponding to the position of the first through hole; An insulating member is located between the explosion-proof valve and the battery core, and the insulating member is provided with a first protrusion protruding toward the explosion-proof valve, and a first gap exists between the first protrusion and the explosion-proof valve.

[0006] In combination with the first aspect of the present application, in an optional implementation manner, the insulating member is further provided with a second protrusion facing the battery core, and the second protrusion at least partially surrounds the first protrusion.

[0007] In combination with the first aspect of the present application, in an optional implementation manner, a third protrusion is provided on a side of the shell close to the insulating member, and the third protrusion at least partially surrounds the explosion-proof valve.

[0008] In combination with the first aspect of the present application, in an optional implementation manner, the first protrusion is provided with a plurality of first vent holes, and the gas generated by the battery cell flows toward the explosion-proof valve through the plurality of first vent holes.

[0009] In combination with the first aspect of the present application, in an optional embodiment, a limiting groove is provided on the side of the second protrusion facing the shell, and a third protrusion is provided on the side of the shell close to the insulating member, the third protrusion at least partially surrounds the explosion-proof valve, and the third protrusion is at least partially located in the limiting groove.

[0010] In combination with the first aspect of the present application, in an optional embodiment, the third protrusion is provided with a plurality of second vent holes, and the plurality of second vent holes are circumferentially distributed around the axis of the third protrusion; The second protrusion is provided with a plurality of third vent holes, the plurality of third vent holes are circumferentially distributed around the axis of the second protrusion, and the third vent holes penetrate the limiting groove; Wherein, the third ventilation hole and the second ventilation hole are arranged opposite to each other, so that the gas generated by the battery core flows through the third ventilation hole and the second ventilation hole.

[0011] In combination with the first aspect of the present application, in an optional embodiment, the limiting groove has a first side wall and a second side wall that are arranged opposite to each other, the second side wall is arranged on a side close to the first protrusion, the third protrusion is in contact with the first side wall of the limiting groove, and has a second gap between the third protrusion and the second side wall of the limiting groove, so that part of the gas generated by the battery cell passes through the third vent hole and the second vent hole and then flows from the second gap to the explosion-proof valve.

[0012] In combination with the first aspect of the present application, in an optional implementation, along the radial direction of the third protrusion, the projection of the second ventilation hole covers the projection of the third ventilation hole.

[0013] In combination with the first aspect of the present application, in an optional implementation manner, a surface of the first protrusion facing the explosion-proof valve is an arc-shaped structure.

[0014] In combination with the first aspect of the present application, in an optional implementation manner, a first depression is formed on a side of the first protrusion close to the battery cell.

[0015] In combination with the first aspect of the present application, in an optional implementation manner, a surface of the explosion-proof valve close to the first protrusion is concave inwardly, and a surface of the explosion-proof valve away from the first protrusion is convex outwardly.

[0016] In combination with the first aspect of the present application, in an optional implementation manner, there is a minimum gap between the first protrusion and the explosion-proof valve, and the minimum gap is less than or equal to 0.5 mm and greater than or equal to 0.1 mm.

[0017] In combination with the first aspect of the present application, in an optional embodiment, the first protrusion has a first area and a second area surrounding the first area, the first area has a second distance from the explosion-proof valve, the second area has a third distance from the explosion-proof valve, and the second distance is less than or equal to the third distance.

[0018] In combination with the first aspect of the present application, in an optional implementation, the third distance is less than or equal to 6 mm and greater than 0.5 mm.

[0019] In a second aspect, an embodiment of the present application provides an electrical device, comprising a battery provided according to any embodiment of the first aspect.

[0020] The insulating member in the battery provided in the embodiment of the present application is provided with a first protrusion protruding toward the explosion-proof valve. A first gap exists between the first protrusion and the explosion-proof valve, which can provide a certain deformation space for the explosion-proof valve. The first protrusion can support the deformed explosion-proof valve, greatly reducing the depression problem of the explosion-proof valve caused by negative pressure, further improving the durability of the explosion-proof valve, and improving the safety of the battery.

[0021] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings: Figure 1 A schematic diagram of the overall structure of a battery provided in an embodiment of the present application; Figure 2 for Figure 1 Sectional view at AA in the middle; Figure 3 for Figure 2 The enlarged view of point B in the middle; Figure 4a A schematic diagram of the three-dimensional structure of a top cover plate in a battery provided in an embodiment of the present application; Figure 4b A top view of a top cover plate in a battery provided in an embodiment of the present application; Figure 4c for Figure 4b Sectional view at CC; Figure 4d for Figure 4c The enlarged view of point D in the middle; Figure 5a A schematic diagram of the three-dimensional structure of an insulating member in a battery provided in an embodiment of the present application; Figure 5b A top view of an insulating member in a battery provided in an embodiment of the present application; Figure 5c for Figure 5b The cross-sectional diagram at EE in the middle; Figure 5d for Figure 5c The enlarged view of F in FIG. Figure 5e A schematic diagram of a second protrusion in a battery provided in an embodiment of the present application and a first protrusion having a first area and a second area; Figure 6 A side view of an explosion-proof valve in a battery provided in an embodiment of the present application.

[0023] Reference numerals: 100. Battery; 10. Battery cells; 20. Shell; 21, top cover plate; 211, first through hole; 212, third protrusion; 2121, second vent hole; 213, second through hole; 214, first injection hole; 22. explosion-proof valve; 221. second recess; 222. patch; 223. bursting part; 224. connecting part; 23, insulating member; 231, first protrusion; 2311, first vent hole; 2312, first region; 2313, second region; 232, second protrusion; 2321, third vent hole; 2322, limiting groove; 2323, first side wall; 2324, second side wall; 233, third through hole; 234, second injection hole; 30. Pole; 40. Adapter; L1, first distance; L2, second distance; L3, third distance; L4, fourth distance; L5, fifth distance. DETAILED DESCRIPTION

[0024] In order to make the technical solutions and beneficial effects of the present invention more clearly understandable, the following is a detailed description by listing specific embodiments. The drawings are not necessarily drawn to scale, and local features may be enlarged or reduced to more clearly show the details of the local features; unless otherwise defined, the technical and scientific terms used herein have the same meanings as those in the technical field to which this application belongs.

[0025] In the description of the present invention, terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "height", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of simplified description of the present invention, and do not indicate that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and should not be understood as a limitation to the present invention.

[0026] In the present invention, the terms "first" and "second" are only used for the purpose of clear description and cannot be understood as the relative importance of the indicated features or the number of the indicated technical features. Therefore, the features defined as "first" and "second" can explicitly include at least one of the features. In the description of the present invention, "multiple" means at least two, such as two, three, etc.; "several" means at least one, such as one, two, three, etc., unless otherwise clearly and specifically defined.

[0027] In the present invention, unless otherwise clearly defined, the terms "install", "connect", "connect", "fix", "set", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In the present invention, unless otherwise clearly defined, a first feature being “on”, “above”, “above”, “below”, “below”, “below” or “below” a second feature may mean that the first feature is in direct contact with the second feature, or the first feature and the second feature are in indirect contact with each other through an intermediate medium. Moreover, a first feature being “on”, “above” or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than the horizontal height of the second feature. A first feature being “below”, “below” or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the horizontal height of the first feature is lower than the horizontal height of the second feature.

[0029] Figure 1 The overall structural diagram of the battery 100 provided in the embodiment of the present application is shown. Figure 2 for Figure 1 Schematic diagram of the cross section at AA in the middle.

[0030] Please refer to Figures 2 to 4a The battery 100 provided in the embodiment of the present application includes a shell 20, a pole 30, a switching piece 40, a battery cell 10, an explosion-proof valve 22 and an insulating member 23.

[0031] The battery core 10 is accommodated in the housing 20 , and the battery core 10 is a winding type or a stacked type.

[0032] The adapter 40 is connected between the pole 30 and the battery cell 10 .

[0033] The housing 20 includes a top cover plate 21 , on which a first through hole 211 is provided. The top cover plate 21 is a plain aluminum sheet, but is not limited thereto.

[0034] The explosion-proof valve 22 is connected to the housing 20 . The explosion-proof valve 22 may be connected to the top cover plate 21 of the housing 20 , or may be connected to other positions of the housing 20 .

[0035] In the embodiment of the present application, the explosion-proof valve 22 is connected to the top cover plate 21 of the shell 20 as an example.

[0036] The explosion-proof valve 22 is connected to the top cover plate 21 , and the explosion-proof valve 22 corresponds to the position of the first through hole 211 provided on the top cover plate 21 .

[0037] The top cover plate 21 and the insulating member 23 are stacked and abutted against each other, and the insulating member 23 is located between the explosion-proof valve 22 and the battery cell 10 . The insulating member 23 is provided with a first protrusion 231 protruding toward the explosion-proof valve 22 , and a first gap exists between the first protrusion 231 and the explosion-proof valve 22 .

[0038] In the above battery 100, the first protrusion 231 can support the deformed explosion-proof valve 22, greatly reducing the possibility of the explosion-proof valve 22 being sunken due to negative pressure, and further improving the durability of the explosion-proof valve 22 and the safety of the battery 100; at the same time, there is a first gap between the first protrusion 231 and the explosion-proof valve 22, which can give the explosion-proof valve 22 a certain deformation space without having too much impact on the explosion value of the explosion-proof valve.

[0039] Figure 4a FIG. 2 shows a schematic diagram of the three-dimensional structure of the top cover plate 21. Figure 4a 2 shows a first through hole 211 , a second through hole 213 and a first liquid injection hole 214 provided on the top cover plate 21 .

[0040] Figure 5a FIG. 2 shows a schematic diagram of the three-dimensional structure of the insulating member 23. Figure 5a FIG. 2 shows a third through hole 233 , a first protrusion 231 and a second liquid injection hole 234 provided on the insulating member 23 .

[0041] The third through hole 233 of the insulating member 23 corresponds to the second through hole 213 on the top cover plate 21, and both are used for the pole 30 to pass through. The pole passes through the second through hole 213 and the third through hole 233 and is electrically connected to the cell tab to achieve circuit conduction. The number of the second through holes 213 is the same as the number of the third through holes 233 and the number of the poles 30 passed through the top cover plate 21. For example, Figure 2 It is shown in the figure that the battery 100 in the embodiment of the present application has two poles 30 and both poles 30 are penetrated through the top cover plate 21 , and the number of the third through hole 233 and the second through hole 213 is two.

[0042] The second injection hole 234 of the insulating member 23 corresponds to the first injection hole 214 of the top cover plate 21 , and the electrolyte is injected into the battery cell through the first injection hole 214 of the top cover plate 21 and the second injection hole 234 of the insulating member 23 .

[0043] The first through hole 211 of the top cover plate 21 is used to install the explosion-proof valve 22 , and the first protrusion 231 corresponds to the position of the first through hole 211 and the explosion-proof valve 22 , and can support the explosion-proof valve 22 after deformation.

[0044] In an optional embodiment, the first protrusion 231 is provided with a plurality of first vent holes 2311, and the gas generated by the battery cell 10 flows to the explosion-proof valve 22 through the plurality of first vent holes 2311. The plurality of first vent holes 2311 are evenly distributed on the first protrusion 231, so that the gas generated by the battery cell 10 can flow to the explosion-proof valve 22 evenly and quickly through the first protrusion 231, so that the explosion-proof valve 22 can respond to the change of gas pressure in the battery cell and explode in time.

[0045] In an optional embodiment, a surface of the first protrusion 231 facing the explosion-proof valve 22 is an arc-shaped structure, and the first protrusion 231 with an arc-shaped structure can improve the supporting effect on the explosion-proof valve 22 .

[0046] In an optional embodiment, a first depression is formed on a side of the first protrusion 231 close to the battery cell 10 .

[0047] It can be understood that the first protrusion 231 as a whole is in an arc-shaped structure toward the explosion-proof valve 22, so that the space between the battery cell 10 and the first protrusion 231 can be increased, and the area of ​​the first vent hole 2311 can be increased to facilitate gas gathering, thereby increasing the exhaust volume of the gas generated by the battery cell 10 flowing from the first protrusion 231 to the explosion-proof valve 22, further improving the safety of the battery 100.

[0048] In an alternative embodiment, if Figure 3 and Figure 6 As shown, the surface of the explosion-proof valve 22 close to the first protrusion 231 is recessed inward to form a second recess 221 , and the surface of the explosion-proof valve 22 away from the first protrusion 231 is protruding outward.

[0049] Furthermore, the shape of the explosion-proof valve 22 matches the shape of the first protrusion 231. It can be understood that the shape of the first protrusion 231 and the shape of the explosion-proof valve 22 are contoured structures, which can improve the matching degree between the first protrusion 231 and the explosion-proof valve 22. Regardless of whether the explosion-proof valve 22 is partially depressed or depressed over a large area, the first protrusion 231 can support the depressed explosion-proof valve 22, thereby ensuring the supporting effect of the first protrusion 231 on the explosion-proof valve when it is depressed.

[0050] The shape of the explosion-proof valve 22 matches the shape of the first protrusion 231. It can also be understood that the explosion-proof valve 22 is an arc-shaped structure that protrudes away from the first protrusion 231. The negative pressure generated during the production process or during the charging and discharging process of the battery will cause the explosion-proof valve to deform downward. The explosion-proof valve set to an arc-shaped structure can reduce its degree of concavity; and after the explosion-proof valve is deformed, under the support of the first protrusion 231, its degree of deformation can be further reduced to ensure the safety of the battery.

[0051] In an alternative embodiment, the surface of the explosion-proof valve 22 close to the first protrusion 231 and the surface away from the first protrusion 231 are planar structures.

[0052] In an alternative embodiment, if Figure 3 As shown, there is a minimum gap between the first protrusion 231 and the explosion-proof valve 22, that is, Figure 3 As shown in L2, the minimum gap L2 is less than or equal to 0.5 mm and greater than or equal to 0.1 mm. If the minimum gap is less than 0.1 mm, the explosion-proof valve 22 cannot be deformed normally. If the minimum gap is greater than 0.5 mm, the explosion-proof valve 22 cannot be effectively supported.

[0053] It should be noted that the gas inside the battery is in a dynamic equilibrium process, and the explosion-proof valve 22 will produce a certain deformation during this dynamic equilibrium process. The minimum gap L2 can provide a certain downward deformation space for the explosion-proof valve 22 to ensure that the explosion-proof valve 22 is deformed within a normal range, and at the same time can support the explosion-proof valve 22 to prevent the explosion-proof valve 22 from deforming too much and causing an unstable explosion value, thereby further ensuring the safety of the battery 100.

[0054] In an alternative embodiment, if Figure 2 , Figure 3 and Figure 4a As shown, the top cover plate 21 is provided with a third protrusion 212 on one side close to the insulating member 23, and the third protrusion 212 is at least partially provided around the explosion-proof valve 22. Since the top cover plate 21 is provided with the first through hole 211, the strength of the top cover plate 21 is relatively low, and the third protrusion 212 can improve the structural strength of the top cover plate 21 and greatly reduce the possibility of deformation of the top cover plate 21.

[0055] The third protrusion 212 surrounds the explosion-proof valve 22 and is consistent with the shape of the explosion-proof valve 22. Exemplarily, the explosion-proof valve 22 is in a circular structure, and the third protrusion 212 is also in a circular structure. On the one hand, the third protrusion 212 in a circular structure can improve the matching degree with the explosion-proof valve 22; on the other hand, the third protrusion 212 in a circular structure can further increase the structural strength of the top cover plate 21. Of course, the shape of the third protrusion 212 is not limited thereto.

[0056] In an alternative embodiment, if Figure 2 , Figure 3 , Figure 5a , Figure 5b , Figure 5c and Figure 5d As shown, the insulating member 23 is further provided with a second protrusion 232 facing the battery cell 10, and the second protrusion 232 at least partially surrounds the first protrusion 231. The second protrusion 232 at least partially surrounds the first protrusion 231, which can strengthen the structural strength of the first protrusion 231, and further improve the supporting effect of the first protrusion 231 on the explosion-proof valve 22; in addition, the second protrusion 232 can also abut against the battery cell 10, and is used to limit the battery cell 10, prevent the battery cell from shaking in the shell, and improve the overall structural stability of the battery 100.

[0057] Preferably, the second protrusion 232 surrounds the first protrusion 231 , which can not only improve the structural strength of the first protrusion 231 , but also further improve the supporting effect on the explosion-proof valve 22 .

[0058] Furthermore, the second protrusion 232 surrounds the first protrusion 231 and has the same contour shape as the first protrusion 231. Exemplarily, the contour shape of the first protrusion 231 is a circular structure, and the contour shape of the second protrusion 232 is also a circular structure. The circular second protrusion 232 can match the first protrusion 231 and the third protrusion 212, thereby ensuring the structural strength and structural stability of the entire battery 100.

[0059] It should be noted that when the shape of the explosion-proof valve 22 is other shapes, the shapes of the second protrusion 232 and the third protrusion 212 also change accordingly with the shape of the explosion-proof valve 22. For example, if the shape of the explosion-proof valve 22 is an ellipse, the shapes of the second protrusion 232 and the third protrusion 212 are also elliptical. Of course, the shape of the explosion-proof valve 22 is not limited to this.

[0060] In an optional embodiment, a limiting groove 2322 is provided on the side of the second protrusion 232 facing the housing 20, and a third protrusion 212 provided on the side of the housing 20 close to the insulating member 23 is at least partially located in the limiting groove 2322. The third protrusion 212 is at least partially located in the limiting groove 2322, which not only facilitates the positioning of the insulating member 23 and the top cover plate 21 and ensures the relative position accuracy of the insulating member 23 and the top cover plate 21, but also improves the overall structural strength of the insulating member 23, and further improves the supporting effect of the first protrusion 231 on the explosion-proof valve 22.

[0061] Furthermore, the end of the third protrusion 212 abuts against the bottom of the limiting groove 2322 , so as to improve the structural strength of the second protrusion 232 and greatly reduce the deformation of the insulating member 23 due to the extrusion of the battery cell 10 .

[0062] In an alternative embodiment, if Figure 3 , Figure 4a , Figure 4b , Figure 4c and Figure 5a As shown, the third protrusion 212 is provided with a plurality of second vents 2121, which are circumferentially distributed around the axis of the third protrusion 212. The second protrusion 232 is provided with a plurality of third vents 2321, which are circumferentially distributed around the axis of the second protrusion 232, and the third vents 2321 penetrate the limiting groove 2322. The third vents 2321 are arranged opposite to the second vents 2121, so that the gas generated by the battery cell 10 flows through the third vents 2321 and the second vents 2121.

[0063] It can be understood that when the second protrusion 232 abuts against the battery cell 10, the gas generated at the position corresponding to the first protrusion 231 of the battery cell 10 can flow from the multiple first vents 2311 to the explosion-proof valve 22, and the gas generated from other positions of the battery cell 10 can flow from the multiple first vents 2311 to the explosion-proof valve 22 after passing through the third vent 2321 and the second vent 2121. The number and size of the third vent 2321 and the second vent 2121 are set according to specific circumstances, and the embodiment of the present application does not specifically limit them. In addition, the axial direction of the first vent 2311 is different from the axial direction of the second vent 2121 and the third vent 2321. When the multiple first vents 2311 provided on the first protrusion 231 are blocked, the third through hole 233 and the second through hole 213 can discharge the gas generated by the battery cell 10 to the explosion-proof valve 22, thereby ensuring the safety of the battery 100.

[0064] In an alternative embodiment, if Figure 4b and Figure 4d As shown, there is a fourth distance between the bottom of the second vent hole 2121 provided on the third protrusion 212 and the surface of the top cover plate 21, that is, Figure 4dAs shown in FIG. 1 , the fourth distance L4 is greater than or equal to 0.2 mm, which can not only ensure the structural strength of the third protrusion 212 , but also greatly reduce the deformation of the explosion-proof valve 22 caused by the deformation of the third protrusion 212 .

[0065] In an alternative embodiment, if Figure 3 and Figure 5d As shown, the limiting groove 2322 has a first side wall 2323 and a second side wall 2324 that are arranged opposite to each other, the second side wall 2324 is arranged on a side close to the first protrusion 231, and the third protrusion 212 contacts the first side wall 2323 of the limiting groove 2322, and has a second gap between the third protrusion 212 and the second side wall 2324 of the limiting groove 2322, so that part of the gas generated by the battery cell 10 flows from the second gap to the explosion-proof valve 22 after passing through the third vent hole 2321 and the second vent hole 2121. The third protrusion 212 contacts the first side wall 2323 of the limiting groove 2322, which can improve the structural strength of the second protrusion 232 and reduce the deformation of the second protrusion 232.

[0066] It can be understood that the gas generated by the battery cell 10 can flow from the first vent hole 2311 of the first protrusion 231 to the explosion-proof valve 22, or can flow from the third vent hole 2321, the second vent hole 2121 and the second gap to the explosion-proof valve 22, which can increase the flow speed and flow rate of the gas generated by the battery cell 10 to the explosion-proof valve 22, and further improve the safety of the battery 100.

[0067] Furthermore, there is a second gap between the third protrusion 212 and the second side wall 2324 of the limiting groove 2322, that is, Figure 3 As shown in FIG. 1 , the second gap L1 is greater than or equal to 0.5 mm to ensure that the gas generated by the battery cell 10 can pass smoothly and flow to the explosion-proof valve 22 .

[0068] In an optional embodiment, along the radial direction of the third protrusion 212 , the projection of the second vent hole 2121 covers the projection of the third vent hole 2321 . In this way, the flow rate and flow rate of the gas generated by the battery cell 10 flowing through the third vent hole 2321 and the second through hole 213 can be guaranteed.

[0069] In an optional embodiment, the explosion-proof valve 22 further includes a patch 222, which is connected to a side surface of the top cover plate 21 away from the explosion-proof valve 22 and covers the first through hole 211 of the top cover plate 21. There is a fifth distance between the patch 222 and the top of the explosion-proof valve 22 away from the first protrusion 231, that is, Figure 3 As shown in FIG. 1 , L5 is greater than or equal to 0.5 mm, so that the patch 222 does not contact the top of the explosion-proof valve 22 , thereby protecting the explosion-proof valve 22 .

[0070] Furthermore, the explosion-proof valve 22 includes a bursting portion 223 and a connecting portion 224, wherein the connecting portion 224 is connected to a side of the top cover plate 21 close to the first protrusion 231 and is located inside the third protrusion 212. The connecting portion 224 and the top cover plate 21 are preferably connected by laser welding, but are not limited thereto. There is a first gap between the top of the bursting portion 223 and the top of the first protrusion 231 of the insulating member 23, and there is no contact between the top of the bursting portion 223 and the patch 222.

[0071] In an alternative embodiment, if Figure 3 , Figure 5a and Figure 5e As shown, the first protrusion 231 has a first area 2312 and a second area 2313 surrounding the first area 2312, and there is a second distance between the first area 2312 and the explosion-proof valve 22, that is, Figure 3 The minimum gap L2 shown in FIG. 1 is a third distance between the second region 2313 and the explosion-proof valve 22, that is, Figure 3 As shown in L3, the second distance L2 is less than or equal to the third distance L3.

[0072] Further, the first area 2312 accounts for 5% to 80% of the first protrusion 231. The first area 2312 is a central area extending from the vertex of the first protrusion 231 to the surrounding areas, and the second area 2313 is an edge area of ​​the first protrusion 231, and the edge area surrounds the central area.

[0073] Furthermore, the third distance L3 is less than or equal to 6 mm and greater than 0.5 mm. The third distance L3 between the second area 2313 and the explosion-proof valve 22 can prevent the insulation member 23 from interfering with the explosion-proof valve 22 when being installed.

[0074] The embodiment of the present application also provides an electrical device, including a plurality of batteries 100 as in any of the foregoing embodiments. A plurality of batteries can directly power the electrical device, or they can form a power supply device in parallel, series or mixed connection, such as a battery module, to power various electrical devices in the form of a power supply device. The electrical device can be in various forms, for example, a mobile phone, a portable device, a laptop computer, a battery car, an electric car, a ship, a spacecraft, an electric toy, an electric tool or various household appliances, etc. For example, a spacecraft includes an airplane, a rocket, a space shuttle and a spacecraft, etc. Electric toys include fixed or mobile electric toys, for example, game consoles, electric car toys, electric ship toys and electric airplane toys, etc. Electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools and railway electric tools, for example, electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators and electric planers, etc.

[0075] The battery 100 is provided with a first protrusion 231 protruding from the insulating part 23 toward the explosion-proof valve 22, and a first gap exists between the first protrusion 231 and the explosion-proof valve 22, which can provide a certain deformation space for the explosion-proof valve 22, and the first protrusion 231 can support the deformed explosion-proof valve 22, thereby greatly reducing the occurrence of the depression of the explosion-proof valve 22 caused by negative pressure, improving the safety performance of the battery 100, and further ensuring the safety of the use of electrical devices.

[0076] It should be understood that the above embodiments are exemplary and are not intended to include all possible implementations. Various modifications and changes may also be made on the basis of the above embodiments without departing from the scope of the present disclosure. Similarly, the various technical features of the above embodiments may also be combined arbitrarily to form other embodiments of the present application that may not be clearly described. Therefore, the above embodiments only express several implementations of the present application and do not limit the scope of protection of the patent of this application.

Claims

1. A battery, characterized in that: The battery (100) comprises: The housing (20) is provided with a first through hole (211); The battery cell (10) is accommodated in the housing (20); An explosion-proof valve (22), connected to the housing (20) and corresponding in position to the first through hole (211); An insulating member (23) is located between the explosion-proof valve (22) and the battery cell (10), the insulating member (23) being provided with a first protrusion (231) protruding in the direction of the explosion-proof valve (22), and a first gap being present between the first protrusion (231) and the explosion-proof valve (22).

2. The battery according to claim 1, characterized in that The insulating member (23) is further provided with a second protrusion (232) facing the battery core, and the second protrusion (232) at least partially surrounds the first protrusion (231).

3. The battery according to claim 1, characterized in that A third protrusion (212) is provided on one side of the housing (20) close to the insulating member (23), and the third protrusion (212) at least partially surrounds the explosion-proof valve (22).

4. The battery according to claim 2, characterized in that The first protrusion (231) is provided with a plurality of first vent holes (2311), and the gas generated by the battery core (10) flows toward the explosion-proof valve (22) through the plurality of first vent holes (2311).

5. The battery according to claim 4, characterized in that A limiting groove (2322) is provided on a side of the second protrusion (232) facing the shell (20), and a third protrusion (212) is provided on a side of the shell (20) close to the insulating member (23); the third protrusion (212) at least partially surrounds the explosion-proof valve (22), and the third protrusion (212) is at least partially located in the limiting groove (2322).

6. The battery according to claim 5, characterized in that The third protrusion (212) is provided with a plurality of second ventilation holes (2121), and the plurality of second ventilation holes (2121) are distributed circumferentially around the axis of the third protrusion (212); The second protrusion (232) is provided with a plurality of third ventilation holes (2321), the plurality of third ventilation holes (2321) are circumferentially distributed around the axis of the second protrusion (232), and the third ventilation holes (2321) penetrate the limiting groove (2322); Wherein, the third ventilation hole (2321) and the second ventilation hole (2121) are arranged opposite to each other, so that the gas generated by the battery cell (10) flows through the third ventilation hole (2321) and the second ventilation hole (2121).

7. The battery according to claim 6, characterized in that The limiting groove (2322) has a first side wall (2323) and a second side wall (2324) arranged opposite to each other, the second side wall (2324) being arranged on a side close to the first protrusion (231), the third protrusion (212) being in contact with the first side wall (2323) of the limiting groove (2322), and having a second gap between the third protrusion (212) and the second side wall (2324) of the limiting groove (2322), so that part of the gas generated by the battery cell (10) passes through the third vent hole (2321) and the second vent hole (2121) and then flows from the second gap to the explosion-proof valve (22).

8. The battery according to claim 6, characterized in that Along the radial direction of the third protrusion (212), the projection of the second ventilation hole (2121) covers the projection of the third ventilation hole (2321).

9. The battery according to any one of claims 1 to 8, characterized in that: A surface of the first protrusion (231) facing the explosion-proof valve (22) is an arc-shaped structure.

10. The battery according to any one of claims 1 to 8, characterized in that: A first depression is formed on a side of the first protrusion (231) close to the battery core (10).

11. The battery according to any one of claims 1 to 8, characterized in that: The surface of the explosion-proof valve (22) close to the first protrusion (231) is concave inwards, and the surface of the explosion-proof valve (22) away from the first protrusion (231) is convex outwards.

12. The battery according to any one of claims 1 to 8, characterized in that: There is a minimum gap between the first protrusion (231) and the explosion-proof valve (22), and the minimum gap is less than or equal to 0.5 mm and greater than or equal to 0.1 mm.

13. The battery according to any one of claims 1 to 8, characterized in that: The first protrusion (231) has a first area and a second area surrounding the first area, a second distance is between the first area and the explosion-proof valve, a third distance is between the second area and the explosion-proof valve (22), and the second distance is less than or equal to the third distance.

14. The battery according to claim 13, characterized in that The third distance is less than or equal to 6 mm and greater than 0.5 mm.

15. An electrical device, characterized in that: Comprising a battery as claimed in any one of claims 1 to 14.

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