Top cover assembly, battery and electric equipment

Abstract

The invention relates to a top cover assembly, a battery and electric equipment and relates to the technical field of batteries, the top cover assembly comprises a cover plate, a pole and a sealing ring, the cover plate is provided with an assembly hole, the pole comprises a pole body and a base, the pole body at least partially penetrates through the assembly hole, the base is connected with the pole body, and the pole body and / or the base are / is provided with a limiting body. The limiting bodies are arranged in the circumferential direction of the column body, a reserved gap is formed between at least part of the inner wall of each limiting body and the column body, the outer walls of the multiple limiting bodies are sleeved with the sealing ring, and the sealing ring abuts against one side of the cover plate. According to the top cover assembly, the battery and the electric equipment, the problem that the sealing ring is easy to extrude and break the pole can be solved.

Description

Technical Field

[0001] This application relates to the technical field of batteries, and particularly to a top cover assembly, a battery, and an electrical device. Background Art

[0002] In a battery structure, a sealing ring is sleeved on a pole post to prevent electrolyte leakage. Since there is no reserved space between the sealing ring and the pole post, when the sealing ring is compressed by an external force, the sealing ring can only deform outward, resulting in the compression force being concentrated inside the sealing ring, thereby causing the pole post to be subjected to a large compression force and the pole post is prone to breakage. Summary of the Invention

[0003] To solve the above technical problems, embodiments of the present application provide a top cover assembly, a battery, and an electrical device, which can improve the problem that the sealing ring easily squeezes and breaks the pole post.

[0004] In a first aspect, a top cover assembly is provided, including:

[0005] A cover plate provided with an assembly hole;

[0006] A pole post including a column body and a base, at least a part of the column body passes through the assembly hole, the base is connected to the column body, a limiting body is provided on the column body and / or the base, the limiting body is arranged along the circumferential direction of the column body, and there is a reserved gap between at least a part of the inner wall of the limiting body and the column body;

[0007] A sealing ring is sleeved on the outer walls of a plurality of the limiting bodies, and the sealing ring abuts against one side of the cover plate.

[0008] According to the first aspect of the present application, the limiting body provided on the base is inclined in a direction away from the column body.

[0009] According to the first aspect of the present application, the sealing ring is compressed by the cover plate and the base, the height of the sealing ring before being compressed is A, the height of the limiting body is B, and A and B satisfy: 1 / 4*A ≤ B ≤ 2 / 3*A.

[0010] According to the first aspect of the present application, the radial distance between the part of the limiting body closest to the column body and the column body is C, and the radial distance between the part of the limiting body farthest from the column body and the column body is D; wherein, C satisfies: 0.4 mm ≤ C ≤ 0.6 mm; D satisfies: 1.9 mm ≤ D ≤ 2.1 mm.

[0011] According to the first aspect of the present application, the limiting body includes a plurality of first limiting blocks, the plurality of first limiting blocks are provided on the base, and the plurality of first limiting blocks are spaced apart along the circumferential direction of the base;

[0012] Wherein, a first weak part is provided at the connection between the first limiting block and the base, so that when the pressing force exerted by the sealing ring on the first limiting block reaches a first pressure threshold, the first limiting block bends relative to the base towards the direction close to the column body to provide a deformation space for the sealing ring.

[0013] According to the first aspect of the present application, the height of the first limiting block is less than the radial distance between the column body and the first limiting block.

[0014] According to the first aspect of the present application, the base is provided with a groove, the groove is located in the reserved gap, the groove cooperates with the bent first limiting block, and the top of the bent first limiting block does not exceed the opening edge of the groove.

[0015] According to the first aspect of the present application, the limiting body includes a plurality of second limiting blocks, the plurality of second limiting blocks are connected to the column body, the plurality of second limiting blocks are spaced apart along the circumferential direction of the column body, and each second limiting block gradually moves away from the column body along the direction surrounding the column body from the side wall of the column body.

[0016] According to the first aspect of the present application, a second weak part is provided at the connection between the second limiting block and the column body, so that when the pressing force exerted by the sealing ring on the second limiting block reaches a second pressure threshold, the second limiting block bends relative to the column body towards the direction close to the column body to provide a deformation space for the sealing ring.

[0017] According to the first aspect of the present application, the plurality of bent second limiting blocks are abutted end to end or partially overlapped end to end to form a coating layer, and the coating layer completely covers the circumferential wall of the column body.

[0018] According to the first aspect of the present application, in the direction from the connection end of the second limiting block and the column body to the farthest end of the second limiting block away from the column body, the thickness of the second limiting block gradually becomes smaller.

[0019] In a second aspect, a battery is further provided, including:

[0020] A housing, provided with a receiving cavity, the receiving cavity having an opening;

[0021] An electric core, disposed in the receiving cavity;

[0022] The top cover assembly as described in the previous embodiment, disposed on the top of the housing, the top cover assembly is used to close the opening, and the column body is connected to the electric core.

[0023] In a third aspect, an electrical device is further provided, including:

[0024] The battery as described in the previous embodiment.

[0025] The top cover assembly, battery, and electrical device provided by the embodiments of the present application. By providing a limiting body on the column and / or the base, the sealing ring is sleeved on the outer wall of the limiting body, and by virtue of the reserved gap between a part of the inner wall of the limiting body and the column, a deformation space is provided for the sealing ring. In this way, the reserved gap can buffer the pressing action of the sealing ring on the column, reduce the compression force exerted on the column by the sealing ring, and effectively improve the problem that the column is easily squeezed and broken by the sealing ring under external force. Description of the Drawings

[0026] By describing the embodiments of the present application in more detail in conjunction with the drawings, the above and other objects, features, and advantages of the present application will become more obvious. The drawings are used to provide a further understanding of the embodiments of the present application, and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present application and do not constitute a limitation to the present application. In the drawings, the same reference numerals generally represent the same components or steps.

[0027] Figure 1 It is a schematic structural diagram of the top cover assembly provided by an exemplary embodiment of the present application.

[0028] Figure 2 It is a schematic structural diagram of the pole column provided by an exemplary embodiment of the present application.

[0029] Figure 3 It is a partial cross-sectional view of the top cover assembly provided by an exemplary embodiment of the present application.

[0030] Figure 4 It is a partial cross-sectional view of the top cover assembly provided by another exemplary embodiment of the present application.

[0031] Figure 5 It is a schematic structural diagram of the pole column provided by another exemplary embodiment of the present application from the first perspective.

[0032] Figure 6 It is a schematic structural diagram of the pole column provided by another exemplary embodiment of the present application from the second perspective.

[0033] Figure 7 It is a schematic structural diagram of the pole column provided by another exemplary embodiment of the present application.

[0034] Figure 8 It is a schematic structural diagram of the first limiting block bent into the groove provided by an exemplary embodiment of the present application.

[0035] Figure 9 It is a schematic structural diagram of the pole column provided by another exemplary embodiment of the present application.

[0036] Figure 10Partial cross-sectional view of the terminal post provided by another exemplary embodiment of the present application from the first perspective.

[0037] Figure 11 Partial cross-sectional view of the terminal post provided by another exemplary embodiment of the present application from the second perspective.

[0038] Figure 12 Schematic structural diagram of the second limiting block after bending from the first perspective provided by an exemplary embodiment of the present application.

[0039] Figure 13 Schematic structural diagram of the second limiting block after bending from the second perspective provided by an exemplary embodiment of the present application.

[0040] Reference numerals: 100 - top cover assembly; 110 - cover plate; 111 - assembly hole; 120 - terminal post; 121 - column body; 122 - base; 123 - limiting body; 1231 - first limiting block; 1232 - second limiting block; 124 - first weak part; 125 - groove; 126 - second weak part; 130 - sealing ring; 140 - reserved gap; 150 - insulating part. Detailed Description of the Invention

[0041] Next, exemplary embodiments of the present application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments of the present application. It should be understood that the present application is not limited by the exemplary embodiments described herein.

[0042] Figure 1 Schematic structural diagram of the top cover assembly provided by an exemplary embodiment of the present application. Figure 2 Schematic structural diagram of the terminal post provided by an exemplary embodiment of the present application. Figure 3 Partial cross-sectional view of the top cover assembly provided by an exemplary embodiment of the present application. As Figures 1 to 3 shown, the top cover assembly 100 provided by the embodiment of the present application may include a cover plate 110 and a terminal post 120. The cover plate 110 is provided with an assembly hole 111, and the terminal post 120 is matched with the assembly hole 111.

[0043] Specifically, the terminal post 120 may include a column body 121 and a base 122. The base 122 is connected to the column body 121. At least a part of the column body 121 penetrates through the assembly hole 111, and the base 122 is located on one side of the cover plate 110. In practical applications, the top cover assembly 100 is arranged on the top of the battery cell, and the base 122 is generally arranged on the side of the cover plate 110 close to the battery cell.

[0044] As Figure 2 and Figure 3As shown, the column 121 and / or the base 122 are provided with a limiting body 123. The limiting body 123 is arranged along the circumferential direction of the column 121, and there is a reserved gap 140 between at least part of the inner wall of the limiting body 123 and the column 121. Correspondingly, the top cover assembly 100 may further include a sealing ring 130. The sealing ring 130 is sleeved on the outer walls of a plurality of limiting bodies 123, and the sealing ring 130 abuts against one side of the cover plate 110. In the normal assembly state, the sealing ring 130 can be used to seal the assembly hole 111 to prevent electrolyte leakage; when the sealing ring 130 is compressed by an external force, the inner wall of the sealing ring 130 generates a pressing force on the outer wall of the limiting body 123, and the reserved gap 140 can provide a deformation space for at least part of the inner wall of the limiting body 123, that is, the reserved gap 140 can provide a deformation space for the sealing ring 130.

[0045] That is to say, compared with the technical solution in the related art where the inner wall of the sealing ring 130 directly presses against the column 121 when the sealing ring 130 is compressed by an external force, in the top cover assembly 100 provided by the embodiment of the present application, by providing the limiting body 123 on the column 121 and / or the base 122, the sealing ring 130 is sleeved on the outer wall of the limiting body 123, and with the reserved gap 140 between part of the inner wall of the limiting body 123 and the column 121, a deformation space is provided for the sealing ring 130. In this way, the reserved gap 140 can buffer the pressing action of the sealing ring 130 on the column 121, reduce the compression force exerted by the sealing ring 130 on the column 121, and effectively improve the problem that the column 121 is easily squeezed and broken by the sealing ring 130 when the sealing ring 130 is subjected to an external force.

[0046] It should be understood that the dimension of the reserved gap 140 along the radial direction of the column 121 can be set according to the actual situation.

[0047] In one embodiment, the limiting body 123 can be provided only on the column 121.

[0048] In one embodiment, the limiting body 123 can be provided only on the base 122.

[0049] In one embodiment, the limiting body 123 can be provided on both the column 121 and the base 122.

[0050] In one embodiment, the limiting body 123 can include a plurality of separated parts, and the plurality of separated parts are spaced apart along the circumferential direction of the column 121.

[0051] In one embodiment, the limiting body 123 can be a complete ring structure, and the ring structure surrounds the circumferential direction of the column 121.

[0052] Such as Figure 1 and Figure 3As shown, the top cover assembly 100 may further include an insulating member 150. The insulating member 150 is located outside the column 121, and the insulating member 150 is used to isolate the column 121 from the cover plate 110. The insulating member 150 can prevent current conduction between the column 121 and the cover plate 110, prevent the battery from short - circuiting, and improve the safety performance of the battery.

[0053] In one embodiment, after assembly, the cover plate 110, the insulating member 150, and the base 122 can apply a pressing force to the sealing ring 130. The sealing ring 130 deforms, and the sealing ring 130 applies a compressive force to the limiting body 123.

[0054] Figure 4 This is a partial cross - sectional view of the top cover assembly provided by another exemplary embodiment of the present application. As Figure 3 and Figure 4 shown, the limiting body 123 is arranged on the base 122, and the limiting body 123 is inclined in a direction away from the column 121.

[0055] It should be noted that Figure 3 is the state before the sealing ring 130 is squeezed. The sealing ring 130 is sleeved on the outer wall of the limiting body 123; Figure 4 is the state after the sealing ring 130 is pressed by the aforementioned cover plate 110, insulating member 150, and base 122. The sealing ring 130 deforms, and a part of the sealing ring 130 crosses over the limiting body 123 and fills into the reserved gap 140. The reserved gap 140 provides space for the deformation of the sealing ring 130 and reduces the compressive force of the sealing ring 130 on the column 121.

[0056] It should be noted that if the limiting body 123 is inclined in a direction approaching the column 121, after the sealing ring 130 deforms and crosses over the limiting body 123, due to the blocking effect of the limiting body 123, part of the reserved gap 140 between the limiting body 123 and the column 121 cannot be filled with part of the sealing ring 130, which will affect the overall sealing performance. And in Figure 4 the shown state, since the limiting body 123 is inclined in a direction away from the column 121, therefore, after the sealing ring 130 deforms and crosses over the limiting body 123, a part of the sealing ring 130 can fill the reserved gap 140 between the limiting body 123 and the column 121. In this way, the sealing path of the sealing ring 130 (the contact part between the sealing ring 130 and the cover plate 110 and the contact part between the sealing ring 130 and the column 121) is extended, and the sealing effect of the sealing ring 130 can be further improved.

[0057] It should be understood that if the height of the limiting body 123 (which can be understood as the limiting body 123 in Figure 3 and Figure 4If the height of the limiting body 123 (i.e., the length in the Y direction) is too high, the blocking area of the limiting body 123 against the sealing ring 130 will be too large, resulting in the sealing ring 130 being not easily extended into the reserved gap 140 after being compressed. As a result, the sealing ring 130 cannot effectively release the deformation amount, easily causing damage to the sealing ring 130 and affecting the service life of the sealing ring 130. If the height of the limiting body 123 is too small, the blocking effect of the limiting body 123 on the sealing ring 130 will be weakened, and the sealing ring 130 is likely to directly cross the limiting body 123 and enter the reserved gap 140, thus directly contacting the column body 121, resulting in the reserved gap 140 being unable to play its due role of providing deformation space for the sealing ring 130 when the sealing ring 130 deforms, and causing the column body 121 to be easily squeezed and broken.

[0058] To improve the foregoing problems, the height B of the limiting body 123 in the embodiment of the present application satisfies the following conditions:

[0059] 1 / 4*A ≤ B ≤ 2 / 3*A.

[0060] Wherein, A can be understood as the height of the sealing ring 130 before being compressed, that is, the length of the sealing ring 130 along the Y direction before being compressed.

[0061] As Figure 3 and Figure 4 shown, the radial distance between the part of the limiting body 123 closest to the column body 121 and the column body 121 is C, and the radial distance between the part of the limiting body 123 farthest from the column body 121 and the column body 121 is D.

[0062] It should be noted that if the radial distance C and / or the radial distance D is too small, the aforementioned reserved gap 140 will be too small, and the deformable space provided by the reserved gap 140 for the sealing ring 130 is relatively small, easily causing the sealing ring 130 to still apply a large compressive force to the column body 121, affecting the service life of the column body 121; if the radial distance C and / or the radial distance D is too large, the aforementioned reserved gap 140 will be too large, and the reserved gap 140 will occupy a relatively large space of the top cover assembly 100, resulting in a low space utilization rate of the top cover assembly 100 and affecting the assembly effect of other components in the top cover assembly 100.

[0063] To improve the foregoing problems, the radial distance C and the radial distance D in the embodiment of the present application satisfy the following conditions:

[0064] 0.4 mm ≤ C ≤ 0.6 mm; 1.9 mm ≤ D ≤ 2.1 mm.

[0065] It should be noted that the aforementioned "radial distance" can be understood as the distance in the X direction along Figure 3 and Figure 4 in.

[0066] Figure 5 The structural schematic diagram of the terminal post provided by another exemplary embodiment of the present application from the first perspective. Figure 6 The structural schematic diagram of the terminal post provided by another exemplary embodiment of the present application from the second perspective. As Figure 5 and Figure 6 shown, the limiting body 123 may include a plurality of first limiting blocks 1231. The plurality of first limiting blocks 1231 are all arranged on the base 122, and the plurality of first limiting blocks 1231 are spaced apart along the circumferential direction of the base 122 (that is, the plurality of first limiting blocks 1231 are spaced apart around the circumferential direction of the column body 121). A first weak part 124 is provided at the connection between the first limiting block 1231 and the base 122.

[0067] In practical applications, the sealing ring 130 is sleeved on the plurality of first limiting blocks 1231. When the sealing ring 130 is squeezed, the sealing ring 130 will exert a pressing force on the first limiting block 1231. When the pressing force reaches the first pressure threshold, the first weak part 124 will deform or break, and the first limiting block 1231 will bend relative to the base 122 in the direction close to the column body 121. A part of the sealing ring 130 will cross over the first limiting block 1231 and fill into the reserved gap 140. That is, after the first limiting block 1231 bends, it can provide a deformation space for the sealing ring 130, weaken the compression effect of the sealing ring 130 on the column body 121, and can effectively improve the problem that the sealing ring 130 easily squeezes and breaks the terminal post 120.

[0068] It should be understood that the first pressure threshold can be set according to the actual situation, and the present application embodiment does not make specific limitations on the first pressure threshold.

[0069] In one embodiment, the foregoing first weak part 124 can be formed by setting a hollow hole at the connection between the first limiting block 1231 and the base 122.

[0070] It should be noted that the number of hollow holes corresponding to the first weak part 124 at the same place can be one, two, multiple, etc.

[0071] It should be noted that the height of the first limiting block 1231 (which can be understood as the length of the first limiting block 1231 in the Figure 6 Y direction) is less than the radial distance between the column body 121 and the first limiting block 1231 (which can be understood as the distance between the column body 121 and the first limiting block 1231 in the Figure 6 X direction). In this way, it can be avoided that the first limiting block 1231 interferes with the column body 121 after bending, and it can be avoided that the first limiting block 1231 damages the column body 121 during the bending process.

[0072] Figure 7The structural schematic diagram of the terminal post provided for another exemplary embodiment of the present application. As Figure 7 shown, the base 122 is provided with a groove 125, and the groove 125 is located within the reserved gap 140.

[0073] In practical applications, when the sealing ring 130 presses against the first limiting block 1231, causing the first limiting block 1231 to bend, the bent first limiting block 1231 can be embedded into the groove 125. In this way, the first limiting block 1231 can avoid the sealing ring 130. That is to say, during the process of the sealing ring 130 deforming and filling into the reserved gap 140, the blocking effect of the first limiting block 1231 is reduced. On the one hand, the sealing ring 130 is not easily damaged by the reaction extrusion of the first limiting block 1231. On the other hand, the sealing ring 130 can be more smoothly filled into the reserved gap 140. The reserved gap 140 provides a deformation space for the sealing ring 130, weakening the compression effect of the sealing ring 130 on the column body 121.

[0074] Figure 8 The structural schematic diagram of the first limiting block bent into the groove provided for an exemplary embodiment of the present application. As Figure 8 shown, it should be noted that the top of the bent first limiting block 1231 does not exceed the opening edge of the groove 125. That is to say, the thickness of the first limiting block 1231 is less than or equal to the depth of the groove 125. After the first limiting block 1231 is bent, the entire first limiting block 1231 is located within the groove 125. In this way, the bent first limiting block 1231 will not cause any blocking effect on the sealing ring 130, avoiding damage to the sealing ring 130 due to the interaction force between the first limiting block 1231 and the cover plate 110, and extending the service life of the sealing ring 130; at the same time, it can also facilitate the sealing ring 130 to be more smoothly filled into the reserved gap 140.

[0075] Figure 9 The structural schematic diagram of the terminal post provided for another exemplary embodiment of the present application. Figure 10 The partial cross-sectional view of the terminal post provided for another exemplary embodiment of the present application from the first perspective. Figure 11 The partial cross-sectional view of the terminal post provided for another exemplary embodiment of the present application from the second perspective. As Figures 9 to 11As shown, the limiting body 123 includes a plurality of second limiting blocks 1232. The plurality of second limiting blocks 1232 are connected to the column body 121, and the plurality of second limiting blocks 1232 are spaced apart along the circumferential direction of the column body 121. Each second limiting block 1232 gradually moves away from the column body 121 along the direction of surrounding the column body 121 from the side wall of the column body 121. In this way, a reserved gap 140 as described above can be formed between a part of each second limiting block 1232 and the side wall of the column body 121, which is convenient for providing a deformation space for the sealing ring 130 as described above and buffering the pressing effect of the sealing ring 130 on the column body 121.

[0076] In one embodiment, the surface of the second limiting block 1232 can be an arc-shaped structure. In this way, when the second limiting block 1232 is pressed against and fits the column body 121, the second limiting block 1232 can be adapted to the column body 121, improving the problem of easy stress concentration between the surface of the second limiting block 1232 and the column body 121.

[0077] Figure 12 It is a schematic structural view of the second limiting block after bending in the first perspective provided by an exemplary embodiment of the present application. Figure 13 It is a schematic structural view of the second limiting block after bending in the second perspective provided by an exemplary embodiment of the present application. As Figures 11 to 13 shown, a second weak part 126 is provided at the connection between the second limiting block 1232 and the column body 121.

[0078] In practical applications, the sealing ring 130 is sleeved on a plurality of second limiting blocks 1232. When the sealing ring 130 is squeezed, the sealing ring 130 will also apply a pressing force to the second limiting block 1232. When the pressing force reaches the second pressure threshold, the second weak part 126 will deform or break, and the second limiting block 1232 will bend relative to the column body 121 towards the direction close to the column body 121. In this way, a deformation space can be provided for the sealing ring 130, that is, the sealing ring 130 gradually occupies the reserved gap 140 following the gradually bent second limiting block 1232. The reserved gap 140 can be used to buffer the compression effect of the sealing ring 130, reduce the compression force of the sealing ring 130 on the column body 121, improve the problem that the column body 121 is easily pressed and broken, and extend the service life of the column body 121.

[0079] It should be understood that the second pressure threshold can be set according to actual situations, and the present application embodiment does not make specific limitations on the second pressure threshold.

[0080] In one embodiment, the foregoing second weak part 126 can be formed by setting a hollow hole at the connection between the second limiting block 1232 and the column body 121.

[0081] It should be noted that the number of hollow holes corresponding to the second weak part 126 at the same location can be one, two, multiple, etc.

[0082] In one embodiment, in the direction from the connection end of the second limiting block 1232 and the column 121 to the farthest end of the second limiting block 1232 away from the column 121, the thickness of the second limiting block 1232 gradually decreases. In this way, during the bending process of the second limiting block 1232, the sealing ring 130 gradually acts on different parts of the second limiting block 1232, and the pressing force is gradually released. The reaction force of the second limiting block 1232 on the sealing ring 130 is more uniform, and the problem of stress concentration is not likely to occur in the sealing ring 130.

[0083] In one embodiment, the multiple second limiting blocks 1232 after bending abut against each other at the head and tail or partially overlap at the head and tail to form a coating layer, and the coating layer can completely cover the circumferential wall of the column 121. In this way, the coating layer can effectively protect the column 121 along the circumferential direction of the column 121, avoiding the inner wall of the sealing ring 130 from directly acting on the column 121. At the same time, the circumferential wall of the pole column is smooth and the thickness is uniform, ensuring that the sealing ring 130 is uniformly stressed and deformed consistently.

[0084] The embodiment of the present application also provides a battery, which may include a housing, an electric core, and a top cover assembly 100. The housing is provided with a receiving cavity, the receiving cavity has an opening, the electric core is arranged in the receiving cavity, the top cover assembly 100 is arranged on the top of the housing, the top cover assembly 100 is used to close the opening, the top cover assembly 100 plays a protective role for the electric core, and the column 121 is connected to the electric core.

[0085] In the embodiment of the present application, the battery can be a secondary battery, which refers to a battery that can activate the active material through charging after discharging. The battery can be a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium-metal battery, a sodium-metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-metal hydride battery, a nickel-cadmium battery, a lead-acid battery, etc., and the embodiment of the present application does not limit this. As an example, the battery can be a cylindrical battery, a prismatic battery, a soft-pack battery or a battery of other shapes. The prismatic battery includes a square-shell battery, a blade-shaped battery, a multi-prismatic battery, and the multi-prismatic battery is, for example, a hexagonal-prismatic battery, etc., and the present application has no special limitation.

[0086] The battery provided by the embodiment of the present application includes the top cover assembly 100 as described above, which has all the functions of the top cover assembly 100, and the beneficial effects thereof can refer to the beneficial effects of the foregoing top cover assembly 100.

[0087] The embodiment of the present application also provides an electrical device, including the battery as described in the previous embodiment, and having all the functions of the battery. The beneficial effects of the electrical device can refer to the beneficial effects of the foregoing battery.

[0088] In one embodiment, the above-mentioned electrical equipment may be a vehicle, mobile phone, portable device, laptop computer, ship, spacecraft, electric toy, electric tool, energy storage device, amusement device, elevator and lifting equipment, etc. The vehicle may be a fuel vehicle, gas vehicle or new energy vehicle, and the new energy vehicle may be a pure electric vehicle, hybrid vehicle or range-extended vehicle, etc.; the spacecraft includes airplanes, rockets, space shuttles and spaceships, etc.; the electric toy includes stationary or mobile electric toys, for example, game consoles, electric vehicle toys, electric ship toys or electric airplane toys, etc.; the electric tool includes 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 electric drills, concrete vibrators and electric planers, etc.; the energy storage device may be an energy storage wall, base station energy storage, container energy storage, etc.; the amusement device may be a carousel, a drop tower, etc.

[0089] The basic principles of the present application have been described above in conjunction with specific embodiments. However, it should be noted that the advantages, advantages, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, advantages, effects, etc. are essential for each embodiment of the present application. In addition, the above-disclosed specific details are only for the purposes of illustration and easy understanding, rather than limitations, and the above details do not limit the present application to necessarily adopt the above specific details to be implemented.

[0090] The block diagrams of the devices, apparatuses, equipment, and systems involved in the present application are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open-ended words, meaning "including but not limited to", and can be used interchangeably with each other. The word "or" and "and" used herein refer to the word "and / or", and can be used interchangeably with each other, unless the context clearly indicates otherwise. The word "such as" used herein refers to the phrase "such as but not limited to", and can be used interchangeably with each other.

[0091] It should also be noted that in the devices, equipment and methods of the present application, each component or each step can be decomposed and / or recombined. These decompositions and / or recombinations shall be regarded as equivalent solutions of the present application.

[0092] The foregoing description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Thus, the present application is not intended to be limited to the aspects shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0093] The foregoing description has been presented for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of the present application to the form disclosed herein. Although numerous example aspects and embodiments have been discussed above, those skilled in the art will recognize some variations, modifications, alterations, additions, and subcombinations thereof.

Claims

1. A top cover assembly, characterized in that: include: A cover plate (110) is provided with an assembly hole (111); A pole (120) comprises a column (121) and a base (122), wherein the column (121) is at least partially inserted into the assembly hole (111), the base (122) is connected to the column (121), the column (121) and / or the base (122) are provided with a limiter (123), the limiter (123) is arranged along the circumference of the column (121), and a reserved gap (140) is provided between at least a portion of the inner wall of the limiter (123) and the column (121); The sealing ring (130) is sleeved on the outer walls of the plurality of limiting bodies (123), and the sealing ring (130) is in contact with one side of the cover plate (110).

2. The top cover assembly according to claim 1, characterized in that: The limiting body (123) disposed on the base (122) is tilted in a direction away from the column (121).

3. The top cover assembly according to claim 2, characterized in that: The sealing ring (130) is compressed by the cover plate (110) and the base (122); the height of the sealing ring (130) before being compressed is A; the height of the limiting body (123) is B; and A and B satisfy: 1 / 4*A≤B≤2 / 3*A.

4. The top cover assembly according to claim 2, characterized in that: The radial distance between the part of the limiting body (123) closest to the column (121) and the column (121) is C, and the radial distance between the part of the limiting body (123) farthest from the column (121) and the column (121) is D; wherein C satisfies: 0.4mm≤C≤0.6mm; and D satisfies: 1.9mm≤D≤2.1mm.

5. The top cover assembly according to claim 1, characterized in that: The limiting body (123) comprises a plurality of first limiting blocks (1231), wherein the plurality of first limiting blocks (1231) are arranged on the base (122), and the plurality of first limiting blocks (1231) are distributed at intervals along the circumference of the base (122); A first weak portion (124) is provided at the connection between the first limit block (1231) and the base (122), so that when the pressure exerted by the sealing ring (130) reaches a first pressure threshold, the first limit block (1231) is bent relative to the base (122) in a direction close to the column (121), thereby providing deformation space for the sealing ring (130).

6. The top cover assembly according to claim 5, characterized in that: The height of the first limiting block (1231) is smaller than the radial distance between the column (121) and the first limiting block (1231).

7. The top cover assembly according to claim 5, characterized in that: The base (122) is provided with a groove (125), the groove (125) is located in the reserved gap (140), the groove (125) cooperates with the first limiting block (1231) after being bent, and the top of the first limiting block (1231) after being bent does not exceed the opening edge of the groove (125).

8. The top cover assembly according to claim 1, characterized in that: The limiting body (123) comprises a plurality of second limiting blocks (1232), wherein the plurality of second limiting blocks (1232) are connected to the column (121), and the plurality of second limiting blocks (1232) are distributed at intervals along the circumference of the column (121), and each of the second limiting blocks (1232) gradually moves away from the column (121) from the side wall of the column (121) along a direction surrounding the column (121).

9. The top cover assembly according to claim 8, characterized in that: A second weak portion (126) is provided at the connection between the second limit block (1232) and the column (121), so that when the pressure exerted by the sealing ring (130) reaches a second pressure threshold, the second limit block (1232) is bent relative to the column (121) in a direction close to the column (121), thereby providing deformation space for the sealing ring (130).

10. The top cover assembly according to claim 9, characterized in that: After being bent, the plurality of second limit blocks (1232) are butted end to end or partially overlap end to end to form a coating layer, and the coating layer completely covers the peripheral wall of the column (121).

11. The top cover assembly according to claim 9, characterized in that: From the connection end of the second limiting block (1232) and the column (121) to the farthest end of the second limiting block (1232) from the column (121), the thickness of the second limiting block (1232) gradually decreases.

12. A battery, characterized in that: include: A housing is provided with a receiving cavity, wherein the receiving cavity has an opening; A battery cell is disposed in the accommodating cavity; The top cover assembly according to any one of claims 1 to 11 is arranged on the top of the shell, the top cover assembly is used to close the opening, and the column (121) is connected to the battery cell.

13. An electrical equipment, characterized in that: include: The battery as claimed in claim 12.

Images