Battery side plate, battery, battery pack and electric equipment

Abstract

The utility model discloses a battery side plate, a battery, a battery pack and electric equipment, the battery side plate is provided with a first air hole, the battery side plate is internally provided with an exhaust channel, the first air hole is communicated with the exhaust channel, and the exhaust channel is used for leading air to a preset position. According to the technical scheme provided by the invention, the exhaust flow resistance when the battery cell is subjected to thermal runaway can be reduced, the pressure relief capability of the battery cell is greatly enhanced, and the risk of battery cell explosion is reduced.

Description

Technical Field

[0001] This application belongs to the technical field of batteries, and particularly relates to a battery side plate, a battery, a battery pack, and an electrical device. Background Art

[0002] In the prior art, an insulating side plate is usually designed as a plate-like structure. A tape and a protective film are wrapped outside the insulating side plate, and an exhaust passage is outside the protective film. As a result, the gas generated inside the battery cell needs to pass through the insulating side plate, the tape, and the protective film before it can move to the exhaust passage. The tape and the protective film will impede the gas flow, leading to poor gas flow and prone to electrical safety problems. Summary of the Utility Model

[0003] The purpose of the embodiments of this application is to provide a battery side plate, a battery, a battery pack, and an electrical device.

[0004] According to the first aspect of the embodiments of this application, a battery side plate is provided. The battery side plate is provided with a first air hole, and an exhaust passage is provided inside the battery side plate. The first air hole is communicated with the exhaust passage, and the exhaust passage is used to lead the gas to a preset position.

[0005] Optionally, the battery side plate includes a first end face, the first air hole is opened on the first end face, and the first end face is configured to be attached to the battery cell.

[0006] Optionally, the battery side plate further includes a second end face, the first end face is parallel to the second end face, a second air hole is opened on the second end face, and the second air hole is communicated with the exhaust passage; and / or

[0007] The battery side plate further includes a third end face, the third end face is adjacent to the first end face, a third air hole is opened on the third end face, and the third air hole is communicated with the exhaust passage.

[0008] Optionally, the first air hole is in one or more of the shapes of a circle, an ellipse, a triangle, a rectangle, a square, a rhombus, or a parallelogram; and / or

[0009] The second air hole is in one or more of the shapes of a circle, an ellipse, a triangle, a rectangle, a square, a rhombus, or a parallelogram; and / or

[0010] The third air hole is in one or more of the shapes of a circle, an ellipse, a triangle, a rectangle, a square, a rhombus, or a parallelogram.

[0011] Optionally, a plurality of first air holes are opened on the first end face; and / or

[0012] A plurality of the second air holes are opened on the second end face; and / or

[0013] A plurality of the third air holes are formed in the third end face.

[0014] Optionally, the length of the first end face is greater than the length of the second end face.

[0015] Optionally, a first mounting hole is formed at an end of the first end face.

[0016] Optionally, the length of the first end face is equal to the length of the second end face.

[0017] A first mounting hole is formed at an end of the first end face, a second mounting hole is formed at an end of the second end face, and the first mounting hole and the second mounting hole are concentrically arranged.

[0018] Optionally, the battery side plate is made of at least one of polyethylene material, polypropylene material, polyimide, and ceramic material.

[0019] According to a second aspect of the embodiments of the present application, a battery is provided, including:

[0020] The above-mentioned battery side plate;

[0021] A battery cell, and the first air hole is attached to a side end of the battery cell.

[0022] Optionally, the battery further includes an end cover assembly. A connecting portion is provided at an end of the end cover assembly facing the battery side plate, and the connecting portion is connected to the first mounting hole and / or the second mounting hole of the battery side plate.

[0023] Optionally, the connecting portion is a protrusion, and the protrusion is embedded in the first mounting hole and / or the second mounting hole.

[0024] Optionally, an explosion-proof valve is provided at an end of the end cover assembly away from the battery cell for relieving pressure when the internal air pressure of the battery cell is higher than a preset value.

[0025] According to a third aspect of the embodiments of the present application, a battery pack is provided, including a plurality of the above-mentioned batteries and a battery protection structure, and the battery protection structure is used to protect the batteries.

[0026] According to a fourth aspect of the embodiments of the present application, an electrical device is provided, including the above-mentioned battery pack and an electrical appliance, and the battery pack is used to supply power to the electrical appliance.

[0027] One technical effect of the embodiments of the present application is that when the battery cell undergoes thermal runaway and generates gas, the gas can enter the exhaust passage through the first air hole, and the gas is led to a preset position for discharge through the exhaust passage, thereby reducing the flow resistance of the exhaust gas when the battery cell undergoes thermal runaway, greatly enhancing the pressure relief ability of the battery cell, and reducing the risk of explosion of the battery cell.

[0028] Other features and advantages of the present application will become clear from the following detailed description of the exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings incorporated in and constituting a part of this specification illustrate embodiments of the present application and, together with the description thereof, are used to explain the principles of the present application.

[0030] Figure 1 is a schematic structural diagram of a battery side plate in an embodiment of the present application;

[0031] Figure 2 is a schematic structural diagram of a battery side plate in an embodiment of the present application;

[0032] Figure 3 is a schematic structural diagram of a battery side plate in an embodiment of the present application;

[0033] Figure 4 is a schematic structural diagram of a battery side plate in an embodiment of the present application;

[0034] Figure 5 is a schematic structural diagram of a battery side plate in an embodiment of the present application;

[0035] Figure 6 is a schematic structural diagram of a battery in an embodiment of the present application;

[0036] Figure 7 is a schematic structural diagram of an end cap assembly in an embodiment of the present application.

[0037] Description of the reference numerals: Battery side plate 100; First end face 1; First air hole 11; First mounting hole 12; Second end face 2; Second air hole 21; Second mounting hole 22; Exhaust passage 3; Air outlet 31; Battery 200; Battery cell 4; Side end 41; End cap assembly 5; Explosion-proof valve 51; Connecting portion 52; Fixing portion 6; Protective film 7; Outer shell 8; Third end face 9; Third air hole 91. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0038] Now, various exemplary embodiments of the present application will be described in detail with reference to the accompanying drawings. It should be noted that: Unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application.

[0039] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present application, its application, or uses.

[0040] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0041] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0042] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0043] In the prior art, the battery side plate 100 is usually a plate-like structure, and the outside of the battery side plate 100 is wrapped with tape and a protective film 7, so that the exhaust channel 3 can only be outside the protective film 7, which easily leads to poor flow of the gas generated in the battery cell 4 moving to the exhaust channel 3.

[0044] like Figures 1 - 5 As shown, according to the first aspect of an embodiment of the present application, a battery side plate 100 is provided, wherein the battery side plate 100 is provided with a first air hole 11, an exhaust channel 3 is provided inside the battery side plate 100, the first air hole 11 is connected to the exhaust channel 3, and the exhaust channel 100 is used to guide the gas to a preset position.

[0045] The battery side plate 100 is disposed inside the battery 200 , between the battery cell 4 and the outer shell 8 , so as to provide insulation between the outer shell 8 and the battery cell 4 .

[0046] In the embodiment of the present application, an exhaust channel 3 is provided inside the battery side plate 100 , and both ends of the battery side plate 100 are exhaust ports 31 of the exhaust channel 3 , and the exhaust ports 31 are configured to communicate with the interior of the battery 200 .

[0047] A first air hole 11 is opened on the battery side plate 100, and the first air hole 11 is connected to the exhaust channel 3, and the first air hole 11 is arranged adjacent to the battery cell 4. When the battery cell 4 has thermal runaway and generates gas, the gas can enter the exhaust channel 3 through the first air hole 11, and the gas is discharged into the interior of the battery 200 through the exhaust channel 3, thereby reducing the flow resistance of the exhaust when the battery cell 4 has thermal runaway, greatly enhancing the pressure relief capacity of the battery cell 4, and reducing the risk of explosion of the battery cell 4.

[0048] In an alternative embodiment, the battery side plate 100 includes a first end face 1, the first air hole 11 is opened on the first end face 1, and the first end face 1 is configured to be attached to the battery cell 4.

[0049] Wherein, the battery side plate 100 includes a first end face 1, the first air hole 11 is opened on the first end face 1, and the first end face 1 will be attached to the side end 41 of the battery cell 4. After the battery cell 4 undergoes thermal runaway, it is convenient for gas to enter the exhaust passage 4, thereby improving the exhaust rate.

[0050] In an alternative embodiment, the battery side plate 100 further includes a second end face 2, the first end face 1 is parallel to the second end face 2, the second end face 2 is provided with a second air hole 21, and the second air hole 21 communicates with the exhaust passage 3; and / or

[0051] The battery side plate 100 further includes a third end face 9, the third end face 9 is adjacent to the first end face 1, the third end face 9 is provided with a third air hole 91, and the third air hole 91 communicates with the exhaust passage 91.

[0052] In a specific embodiment, as Figure 2 shown, the battery side plate 100 includes a second end face 2, the second end face 2 is arranged parallel to the first end face 1, the second end face 2 is provided with a second air hole 21, and the second air hole 21 communicates with the exhaust passage 3. When the battery cell 4 undergoes thermal runaway and generates gas, the gas enters the exhaust passage 3 through the first air hole 11, and then is discharged from the exhaust passage 3 through the second air hole 21 into the interior of the battery 200. The gas flows in the interior of the battery 200 towards the direction of the explosion-proof valve 51. Therefore, the gas inside the battery cell 4 can be discharged through multiple exhaust methods, thereby improving the gas discharge rate and reducing the risk of explosion of the battery cell 4.

[0053] In another specific embodiment, the battery side plate 100 includes a third end face 9, the third end face 9 is adjacent to the first end face 1. A third air hole 91 is opened on the third end face 9, and the third air hole 91 communicates with the exhaust passage 3. When the battery cell 4 undergoes thermal runaway and generates gas, the gas enters the exhaust passage 3 through the first air hole 11, and then is discharged from the exhaust passage 3 through the third air hole 91 into the interior of the battery 200. The gas flows in the interior of the battery 200 towards the direction of the explosion-proof valve 51. Therefore, the gas inside the battery cell 4 can be discharged through multiple exhaust methods, thereby improving the gas discharge rate and reducing the risk of explosion of the battery cell 4.

[0054] In another specific embodiment, the battery side plate 100 includes a second end face 2 and a third end face 9. The second end face 2 is arranged parallel to the first end face 1, the third end face 9 is arranged adjacent to the first end face 1, and the third end face 9 is arranged adjacent to the second end face 2. Among them, a second air hole 21 is provided on the second end face 2, and a third air hole 91 is provided on the third end face 9. Both the second air hole 21 and the third air hole 91 are air outlet holes to improve the gas discharge rate, thereby further reducing the risk of explosion of the battery cell 4.

[0055] In an alternative embodiment, the first air hole 11 is in one or more of the shapes of a circle, an ellipse, a triangle, a rectangle, a square, a rhombus or a parallelogram; and / or

[0056] The second air hole 21 is in one or more of the shapes of a circle, an ellipse, a triangle, a rectangle, a square, a rhombus or a parallelogram; and / or

[0057] The third air hole 91 is in one or more of the shapes of a circle, an ellipse, a triangle, a rectangle, a square, a rhombus or a parallelogram

[0058] In a preferred embodiment, as Figure 4 and Figure 5 shown, the first air hole 11 is triangular, and a plurality of first air holes 11 are evenly distributed. Specifically, four triangular first air holes 11 form a rectangle, and adjacent two triangular first air holes 11 are spaced apart. This setting can both reduce the weight of the battery side plate 100 and improve the exhaust efficiency.

[0059] In a preferred embodiment, the second air hole 22 is triangular, and a plurality of second air holes 22 are evenly distributed. Specifically, four triangular second air holes 22 form a rectangle, and adjacent two triangular second air holes 22 are spaced apart. This setting can both reduce the weight of the battery side plate 100 and improve the exhaust efficiency.

[0060] In a preferred embodiment, the third air hole 91 is triangular, and a plurality of third air holes 91 are evenly distributed. Specifically, four triangular third air holes 91 form a rectangle, and adjacent two triangular third air holes 91 are spaced apart. This setting can both reduce the weight of the battery side plate 100 and improve the exhaust efficiency.

[0061] In a preferred embodiment, a plurality of the first air holes 11 are provided on the first end face 1. This can both reduce the weight of the battery side plate 100 and improve the exhaust rate.

[0062] In a preferred embodiment, a plurality of the second air holes 21 are formed on the second end face 2, which can not only reduce the weight of the battery side plate 100, but also improve the exhaust rate.

[0063] In a preferred embodiment, a plurality of the third air holes 91 are formed on the third end face 9, which can not only reduce the weight of the battery side plate 100, but also improve the exhaust rate.

[0064] In an alternative embodiment, the length of the first end face 1 is greater than the length of the second end face 2.

[0065] As Figure 3 shown, the length of the first end face 1 is greater than the length of the second end face 2. The first end face 1 and the second end face 2 will not be flush in the length direction, which is convenient for installing the battery side plate 100 and can also enable the gas to quickly discharge from the exhaust passage 3 without being blocked.

[0066] In an alternative embodiment, a first mounting hole 12 is formed at the end of the first end face 1.

[0067] In the embodiment where the length of the first end face 1 is greater than the length of the second end face 2, a first mounting hole 12 is formed at the end of the first end face 1. The first mounting hole 12 is used to connect with the end cover assembly 5 of the battery 200 to fix the battery side plate 100 to the side end 41 of the battery cell 4. Wherein, first mounting holes 12 are provided at both ends of the first end face 1, so as to fix both ends of the battery side plate 100 to the end cover assembly 5 of the battery 200, thereby improving the installation stability of the battery side plate 100.

[0068] In an alternative embodiment, the length of the first end face 1 is equal to the length of the second end face 2. Further, the length of the first end face 1 is the same as the length of the second end face 2, and the ends of the first end face 1 and the second end face 2 are flush in the length direction. When the battery side plate 100 is installed with the end cover assembly 5 of the battery 200, the installation stability can be improved.

[0069] Wherein, for the length directions of the first end face 1 and the second end face 2, please refer to Figure 2 the marked direction.

[0070] In an alternative embodiment, a first mounting hole 12 is formed at the end of the first end face 1, a second mounting hole 22 is formed at the end of the second end face 2, and the first mounting hole 12 and the second mounting hole 22 are concentrically arranged.

[0071] In an embodiment where the length of the first end face 1 is the same as the length of the second end face 2, a first mounting hole 12 is provided at the end of the first end face 1, and a second mounting hole 22 is provided on the second end face 2. The first mounting hole 12 and the second mounting hole 22 are concentrically arranged. The first mounting hole 12 and the second mounting hole 22 are used to connect with the end cover assembly 5 of the battery 200 to fix the battery side plate 100 to the side end 41 of the battery cell 4.

[0072] Wherein, first mounting holes 12 are provided at both ends of the first end face 1, and second mounting holes 22 are provided at both ends of the second mounting hole 22, so that both ends of the battery side plate 100 are fixed to the end cover assembly 5 of the battery 200.

[0073] Further, one or two first mounting holes 12 can be provided at each end of the first end face 1, and one or more second mounting holes 12 can be provided at each end of the second end face 2. Preferably, two first mounting holes 12 are provided at each end of the first end face 1, and two second mounting holes 12 are provided at each end of the second end face 2, which can further improve the installation stability of the battery side plate 100. If too many mounting holes are provided at each end of the first end face 1 or the second end face 2, its structure will be more complex and it is not conducive to installation.

[0074] In an alternative embodiment, the battery side plate 100 is made of at least one of polyethylene, polypropylene, and ceramic materials.

[0075] Further, since the battery side plate 100 is arranged inside the battery 200 and is located between the battery cell 4 and the outer shell 8 to insulate the battery cell 4 from the outer shell 8. Therefore, the battery side plate 100 can be made of at least one of polyethylene, polypropylene, and ceramic materials to insulate the battery cell 4 from the outer shell 8.

[0076] Among them, polyethylene, polypropylene, polyimide, or ceramic materials all have good electrical insulation properties. Therefore, the battery side plate 100 can be selected from any of the above materials according to needs.

[0077] Among them, polyethylene, polypropylene, polyimide, or ceramic materials are all existing materials.

[0078] According to the second aspect of the embodiments of the present application, a battery 200 is provided, including the above-mentioned battery side plate 100 and battery cell 4; the first air hole 11 is attached to the side end 41 of the battery cell 4.

[0079] The battery 200 in the embodiments of the present application may include a lithium-ion secondary battery, a lithium-ion primary battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery, a magnesium-ion battery, etc., and the embodiments of the present application are not limited thereto. The battery 200 may be in the shape of a flat body, a cuboid, or other shapes, and the embodiments of the present application are not limited thereto.

[0080] As Figure 6 and Figure 7 shown, the battery 200 includes a battery cell 4 and a battery side plate 100. The battery side plate 100 is located at the side end 41 of the battery cell 4, and the first end face 1 of the battery side plate 100 is attached to the side end 41 of the battery cell 4. After thermal runaway occurs in the battery cell 4, gas can enter the exhaust channel 3 through the first air holes 11 on the first end face 1, so that there is no obstruction when discharging the gas, thereby improving the power consumption safety of the battery 200.

[0081] Among them, the battery cell 4 includes a positive electrode plate, a negative electrode plate, and a separator located between the positive electrode plate and the negative electrode plate.

[0082] In an optional embodiment, the battery 200 further includes an end cap assembly 5. A connecting portion 52 is provided on one side of the end cap assembly 5 facing the battery side plate 100, and the connecting portion 52 is connected to the first mounting hole 12 and / or the second mounting hole 22 of the battery side plate 100.

[0083] As Figure 7 shown, the battery 200 further includes an end cap assembly 5. The end cap assembly 5 is provided at the end of the battery cell 4. A connecting portion 52 is provided on one side of the end cap assembly 5 facing the battery side plate 100. The connecting portion 52 is connected to the first mounting hole 12, or the connecting portion 52 and the first mounting hole 12 and the second mounting hole 22 are connected, so that the battery side plate 100 and the end cap assembly 5 are fixed together through the connecting portion 52, and its structure is simple and the connection stability is relatively high.

[0084] In a specific embodiment, the connecting portion 5 may be a fixing hole, and the fixing hole is connected to the first mounting hole 12 through a connecting member, so as to fix the battery side plate 100 and the end cap assembly 5 together.

[0085] In another specific embodiment, the connecting portion 52 is a protrusion, and the protrusion is embedded in the first mounting hole 12 and / or the second mounting hole 22. The protrusion can extend in the direction close to the battery side plate 100. The protrusion can be embedded in the first mounting hole 12, or the protrusion is embedded in the first mounting hole 12 and the second mounting hole 22, so as to fix the battery side plate 100 and the end cap assembly 5 through the protrusion. In this embodiment, its structure is simple and it is easy to assemble.

[0086] In an alternative embodiment, an explosion-proof valve 51 is provided at one end of the end cap assembly 5 away from the battery cell 4 for relieving pressure when the internal pressure of the battery cell 4 is higher than a preset value. When the internal pressure of the battery 200 is higher than the preset value, the explosion-proof valve 51 will open, and the gas in the exhaust passage 3 will be discharged from the explosion-proof valve 51.

[0087] In an alternative embodiment, the battery 200 further includes a fixing portion 6 for wrapping the battery cell 4 and the battery side plate 100 to improve the connection stability between the battery cell 4 and the battery side plate 100.

[0088] Wherein, the fixing portion 6 is made of an insulating material.

[0089] In an alternative embodiment, the battery 200 further includes a protective film 7 and a housing 8. The protective film 7 wraps the fixing portion 6, the battery cell 4 and the battery side plate 100 and places them inside the housing 8. The protective film 7 is made of an insulating material, so that the battery cell 4 and the housing 8 are in an insulating relationship.

[0090] According to the third aspect of the embodiments of the present application, a battery pack is provided, including a plurality of the above-mentioned batteries 200 and a battery protection structure for protecting the batteries 200.

[0091] The battery pack may include a battery protection structure and a battery module. The battery protection structure is used to provide an accommodation space for the battery module, and the battery module is installed inside the battery protection structure.

[0092] According to the fourth aspect of the embodiments of the present application, an electrical device is provided, including the above-mentioned battery pack and an electrical appliance, and the battery pack is used to supply power to the electrical appliance.

[0093] The battery pack of the embodiments of the present application is applicable to various electrical devices using batteries. The electrical device can be a mobile phone, a portable device, a laptop computer, a battery car, an electric vehicle, a ship, a spacecraft, an electric toy and an electric tool, etc. For example, the spacecraft includes an airplane, a rocket, a space shuttle and a spaceship, etc. The electric toy includes a fixed or mobile electric toy, such as a game console, an electric vehicle toy, an electric ship toy and an electric airplane toy, etc. The electric tool includes a metal cutting electric tool, a grinding electric tool, an assembly electric tool and a railway electric tool, such as an electric drill, an electric grinding wheel, an electric wrench, an electric screwdriver, a hammer drill, an impact electric drill, a concrete vibrator and a planer. The embodiments of the present application do not make special restrictions on the above-mentioned electrical devices.

[0094] Although some specific embodiments of the present application have been described in detail by way of examples, those skilled in the art should understand that the above examples are only for illustration purposes and not for limiting the scope of the present application. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.

Claims

1. A battery side plate, characterized in that: The battery side plate is provided with a first air hole, an exhaust channel is provided inside the battery side plate, the first air hole is communicated with the exhaust channel, and the exhaust channel is used to guide the gas to a preset position.

2. The battery side plate according to claim 1, characterized in that: The battery side plate includes a first end surface, the first air hole is opened on the first end surface, and the first end surface is configured to fit with the battery cell.

3. The battery side plate according to claim 2, characterized in that: The battery side plate further includes a second end surface, the first end surface is parallel to the second end surface, the second end surface is provided with a second air hole, and the second air hole is connected to the exhaust channel; and / or The battery side plate further includes a third end surface, the third end surface is adjacent to the first end surface, the third end surface is provided with a third air hole, and the third air hole is communicated with the exhaust channel.

4. The battery side plate according to claim 3, characterized in that: The first air hole is in one or more of a circular, elliptical, triangular, rectangular, square, rhombus or parallelogram shape; and / or The second air hole is in one or more of a circular, elliptical, triangular, rectangular, square, rhombus or parallelogram shape; and / or The third air holes are in one or more of a circular, elliptical, triangular, rectangular, square, rhombus or parallelogram shape.

5. The battery side plate according to claim 3, characterized in that: The first end surface is provided with a plurality of first air holes; and / or A plurality of the second air holes are provided on the second end surface; and / or The third end surface is provided with a plurality of third air holes.

6. The battery side plate according to claim 3, characterized in that: The length of the first end surface is greater than the length of the second end surface.

7. The battery side plate according to claim 6, characterized in that: A first mounting hole is formed at the end of the first end surface.

8. The battery side plate according to claim 4, characterized in that: The length of the first end surface is equal to the length of the second end surface.

9. The battery side plate according to claim 8, characterized in that: A first mounting hole is formed at the end of the first end surface, a second mounting hole is formed at the end of the second end surface, and the first mounting hole and the second mounting hole are concentrically arranged.

10. The battery side plate according to any one of claims 1 to 9, characterized in that: The battery side plate is made of at least one of polyethylene, polypropylene, polyimide and ceramic materials.

11. A battery, characterized in that: include: The battery side plate according to any one of claims 1 to 10; The first air hole is in contact with the side end of the battery cell.

12. The battery according to claim 11, characterized in that The battery further comprises an end cover assembly, wherein a connecting portion is provided on a side of the end cover assembly facing the battery side plate, and the connecting portion is connected to the first mounting hole and / or the second mounting hole of the battery side plate.

13. The battery according to claim 12, characterized in that The connecting portion is a protrusion, and the protrusion is connected to the first mounting hole and / or the second mounting hole.

14. The battery according to claim 12, characterized in that An explosion-proof valve is provided at one end of the end cover assembly away from the battery core, which is used to release pressure when the air pressure inside the battery core is higher than a preset value.

15. A battery pack, characterized in that: include: A plurality of batteries and a battery protection structure according to any one of claims 11 to 14, wherein the battery protection structure is used to protect the batteries.

16. An electrical equipment, characterized in that: include: The battery pack and electrical appliance as claimed in claim 15, wherein the battery pack is used to provide power to the electrical appliance.

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