Top cover assembly, battery and electric equipment

Abstract

The utility model provides a top cover assembly, a battery and electric equipment. The top cover assembly comprises a cover plate, a pole and a sealing ring, the cover plate is provided with a first side and a second side which are arranged oppositely, the cover plate is provided with a mounting hole, the pole comprises a main body part and a connecting part, the main body part is arranged on the first side, the connecting part at least partially extends into the mounting hole, and the connecting part extends from the main body part to the second side; a groove is formed in the side, facing the second side, of the connecting part, and the side wall of the groove is obliquely arranged in the direction facing the inner side wall of the mounting hole from the first side to the second side, so that the connecting part can better extrude the sealing ring, and the sealing ring can better seal a gap between the connecting part and the mounting hole. The side wall of the groove is obliquely arranged, so that a wedging effect can be generated between the connecting part sleeved with the sealing ring and the inner side wall of the mounting hole, the friction force between the sealing ring and the inner side wall of the mounting hole is increased, the pole is prevented from loosening relative to the cover plate, and the structure is simple.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field, concretely relates to top cover subassembly, battery and electric equipment. BACKGROUND

[0002] The top cover subassembly of the battery plays a vital role in the current transmission of the battery cell, in the related art, the top cover subassembly usually includes a cover plate, a sealing ring, a pole and a riveted aluminum block, the sealing ring is sleeved on the outer side of the pole, one end of the pole passes through the mounting hole and is riveted with the riveted aluminum block, and then is welded at the laser welding joint to achieve the purpose of being fused together, so as to prevent the pole from loosening relative to the cover plate, however, the top cover subassembly has a complex structure and increases the resistance of the pole. SUMMARY

[0003] The embodiment of the utility model provides a kind of top cover subassembly, battery and electric equipment, simplify the structure of top cover subassembly, reduce the resistance of pole.

[0004] In the first aspect, the embodiment of the utility model provides a kind of top cover subassembly.

[0005] In an embodiment, the top cover subassembly includes

[0006] The cover plate has a first side and a second side arranged opposite to each other, and the cover plate is provided with a mounting hole penetrating through the first side and the second side;

[0007] The pole includes a main body portion and a connecting portion, the main body portion is arranged on the first side, and the connecting portion at least partially extends into the mounting hole, the connecting portion extends from the main body portion towards the second side, one side of the connecting portion towards the second side is provided with a groove, and the side wall of the groove is arranged to be inclined from the first side to the second side towards the inner side wall of the mounting hole;

[0008] The sealing ring is elastically connected between the outer side wall of the connecting portion and the inner side wall of the mounting hole.

[0009] In an embodiment, the thickness of the side wall of the groove is H1, wherein 0.5mm≤H1≤1.5mm.

[0010] In an embodiment, the connecting portion includes

[0011] The base is arranged on the first side and connected with the main body portion;

[0012] The boss is protruded on one side of the base towards the second side, the boss extends into the mounting hole, and the boss forms the groove.

[0013] In an embodiment, the thickness of the base is H2, wherein 0.5mm≤H2≤1mm.

[0014] In an embodiment, a distance between a wall surface of the groove facing the second side and an end surface of the body portion facing the second side is L, wherein 1mm≤L≤1.5mm.

[0015] In an embodiment, a side of the sealing ring facing the second side is provided with an annular groove, and the annular groove is arranged along a circumferential direction of the mounting hole.

[0016] In an embodiment, a groove width of the annular groove is arranged to decrease in a direction from the second side to the first side.

[0017] In an embodiment, a compression amount of the sealing ring is K, wherein 15%≤K≤45%.

[0018] In an embodiment, a thickness of the body portion in a direction from the first side to the second side is H3, wherein 2mm≤H3≤2.5mm.

[0019] In an embodiment, a material of the body portion comprises aluminum and / or a material of the connecting portion comprises copper.

[0020] In an embodiment, a hole diameter of the mounting hole is arranged to at least partially increase in a direction from the first side to the second side.

[0021] In an embodiment, a difference between an inner diameter of the mounting hole adjacent to the first side and an inner diameter of the mounting hole adjacent to the second side is ΔD, wherein 0<ΔD≤2.5mm.

[0022] In an embodiment, the top cover assembly further comprises an upper plastic, and the upper plastic comprises:

[0023] An isolation portion is arranged at the first side, and the isolation portion is used to insulate and separate the pole and the cover plate;

[0024] A surrounding ring is arranged along a circumferential direction of the mounting hole, one end of the surrounding ring is connected with the isolation portion, and an inner side wall of the surrounding ring is used to abut against an outer side wall of the body portion.

[0025] In an embodiment, a thickness of the isolation portion is H4, wherein 0.5mm≤H4≤1.5mm.

[0026] In a second aspect, an embodiment of the utility model provides a battery.

[0027] In an embodiment, the battery comprises the top cover assembly as described above.

[0028] In a third aspect, an embodiment of the utility model provides a power utilization device.

[0029] In an embodiment, the power consuming device includes a battery as described above.

[0030] In the embodiment of the utility model, the mounting hole penetrating through the first side and the second side is arranged on the cover plate, which provides space for mounting the pole. The recess is arranged on one side of the connecting part facing the second side, and the side wall of the recess is arranged to be inclined from the first side to the second side towards the inner side wall of the mounting hole. This design enables the connecting part to better extrude the sealing ring, so that the sealing ring can better seal the gap between the connecting part and the mounting hole. In addition, when the sealing ring is sleeved on the connecting part, the inner side wall of the mounting hole and the connecting part sleeved with the sealing ring will produce a "wedge" effect due to the inclined arrangement of the side wall of the recess, so that the pole is more difficult to pull out of the mounting hole. This physical locking effect helps to improve the connection stability between the cover plate and the pole, and the structure is simple. The inclined side wall of the recess increases the contact area between the sealing ring and the inner side wall of the mounting hole. The larger contact area means greater friction, which helps to prevent the pole from loosening relative to the cover plate. In addition, since the pole is fixedly connected without welding, the resistance of the pole is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the utility model, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative labor.

[0032] Figure 1 It is a structural schematic view of the top cover assembly provided by the embodiment of the utility model.

[0033] Figure 2 It is Figure 1 The local enlarged schematic view of A shown in the figure.

[0034] Figure 3 It is a structural schematic view of the pole provided by the embodiment of the utility model.

[0035] Figure 4 It is a structural schematic view of the sealing ring provided by the embodiment of the utility model.

[0036] Figure 5 It is a structural schematic view of the cover plate provided by the embodiment of the utility model.

[0037] Explanation of reference signs:

[0038] 10, top cover assembly; 11, cover plate; 111, first side; 112, second side; 113, mounting hole; 12, pole; 121, main body; 122, connecting part; 1221, groove; 1222, base; 1223, boss; 13, sealing ring; 131, annular groove; 14, upper plastic; 141, isolation part; 142, fence ring. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application. In addition, it should be understood that the specific embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, the orientation words such as "upper" and "lower" generally refer to the upper and lower of the device in the actual use or working state, and specifically refer to the direction of the drawing in the drawings. And "inner" and "outer" refer to the outline of the device.

[0040] The top cover assembly of the battery plays a crucial role in current transmission of the battery cell. In the related art, the top cover assembly generally includes a cover plate, a sealing ring, a pole and a riveted aluminum block. The outer side of the pole is sleeved with the sealing ring, and one end of the pole passes through the mounting hole and is riveted with the riveted aluminum block after laser welding at the joint to achieve the purpose of being fused together, so as to prevent the pole from loosening relative to the cover plate. However, the top cover assembly has a complex structure and increases the resistance of the pole.

[0041] In view of this, the present application provides a top cover assembly. The top cover assembly provided by the present application simplifies the structure of the top cover assembly and reduces the resistance of the pole. The top cover assembly will be described in detail below with reference to the main drawings.

[0042] Referring to Figures 1 to 3 , Figure 1 is a structure diagram of the top cover assembly provided by the embodiments of the present application, Figure 2 is Figure 1 is a local enlarged diagram of A shown in FIG. 1, Figure 3Is the structure diagram of the pole provided by the embodiment of the utility model. The top cover assembly 10 includes cover plate 11, pole 12 and sealing ring 13, cover plate 11 has the first side 111 and the second side 112 who set away from each other, cover plate 11 is provided with mounting hole 113, mounting hole 113 is set through the first side 111 and the second side 112;Pole 12 includes main part 121 and connecting part 122, main part 121 is located in the first side 111, connecting part 122 at least partially extends into mounting hole 113, connecting part 122 is set from main part 121 towards the second side 112, the side of connecting part 122 towards the second side 112 is provided with recess 1221, the side wall of recess 1221 is set from the first side 111 to the second side 112 and is inclined to the inner side wall direction of mounting hole 113.Sealing ring 13 is elastically connected between the outer side wall of connecting part 122 and the inner side wall of mounting hole 113.

[0043] In the embodiment of the utility model, the mounting hole 113 who sets through the first side 111 and the second side 112 is arranged on the cover plate 11, which provides space for the installation of pole 12. The recess 1221 is arranged on the side of the connecting part 122 towards the second side 112, and the side wall of the recess 1221 is set from the first side 111 to the second side 112 and is inclined to the inner side wall direction of the mounting hole 113. This design enables the connecting part 122 to better extrude the sealing ring 13, so that the sealing ring 13 can better seal the gap between the connecting part 122 and the mounting hole 113. In addition, when the sealing ring 13 is sleeved on the connecting part 122, the inner side wall of the mounting hole 113 and the connecting part 122 with the sealing ring 13 sleeved thereon will produce a "wedge" effect, making it more difficult for the pole 12 to be pulled out of the mounting hole 113. This physical locking effect helps to improve the connection stability between the cover plate 11 and the pole 12, and the structure is simple. The inclined side wall of the recess 1221 increases the contact area between the sealing ring 13 and the inner side wall of the mounting hole 113. A larger contact area means a greater friction force, which helps to prevent the pole 12 from loosening relative to the cover plate 11. In addition, since the pole 12 is fixedly connected without welding, the resistance of the pole 12 is reduced.

[0044] Referring to Figure 3 In an embodiment, the thickness of the side wall of the recess 1221 is H1, where 0.5mm≤H1≤1.5mm. In this way, the thickness of the side wall of the recess 1221 is between 0.5mm and 1.5mm, providing sufficient structural strength for the connecting part 122 to ensure that the recess 1221 is not easily deformed or damaged when subjected to external force, thereby maintaining stable connection between the pole 12 and the cover plate 11. By controlling the thickness of the side wall of the recess 1221 to be between 0.5mm and 1.5mm, the amount of material used can be optimized, avoiding unnecessary waste, which helps to reduce production costs and improve overall economic benefits.

[0045] When the thickness of the side wall of the groove 1221 is greater than 1.5 mm, although the structure of the connecting portion 122 is guaranteed to be light, the weight of the pole 12 is increased and material is wasted, increasing the production cost. When the thickness of the side wall of the groove 1221 is less than 0.5 mm, there will be insufficient strength of the connecting portion 122, resulting in loosening or displacement of the pole 12 relative to the cover plate 11 under the action of vibration or external force.

[0046] It should be noted that the thickness of the side wall of the groove 1221 can be set as needed, for example, the thickness of the side wall of the groove 1221 can be 0.5 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.3 mm or 1.5 mm, etc. Specifically, the present application does not limit this.

[0047] Referring to Figure 3 In an embodiment, the connecting portion 122 includes a base 1222 and a boss 1223, the base 1222 is provided on the first side 111 and connected with the main body portion 121, the boss 1223 is provided on one side of the base 1222 facing the second side 112, the boss 1223 extends into the mounting hole 113, and the boss 1223 forms the groove 1221. In this way, the base 1222 serves as the connecting point of the connecting portion 122 and the main body portion 121, and is responsible for transmitting and dispersing stress, and the boss 1223 serves as the part extending into the mounting hole 113, and is responsible for forming the groove 1221 and forming a close fit with the inner side wall of the mounting hole 113. The combined design of the base 1222 and the boss 1223 helps to optimize the stress distribution, and when the connecting portion 122 is subjected to external force, the base 1222 can disperse the stress and reduce the concentrated stress borne by the boss 1223, thereby improving the structural strength of the entire connecting portion 122.

[0048] Referring to Figure 3 In an embodiment, the thickness of the base 1222 is H2, where 0.5 mm≤H2≤1 mm, so that the thickness of the base 1222 is within the thickness range of 0.5 mm to 1 mm, so that the base 1222 can resist stress in normal use and ensure a stable connection between the connecting portion 122 and the main body portion 121, while maintaining the compactness of the structure of the pole 12. The thickness of the base 1222 within the thickness range of 0.5 mm to 1 mm can enhance the fixing effect of the boss 1223 in the mounting hole 113 and reduce the risk of loosening due to vibration or external force. The thickness of the base 1222 within the thickness range of 0.5 mm to 1 mm can achieve lightweight design while maintaining structural strength, saving materials and costs.

[0049] When the thickness of the base 1222 is greater than 1 mm, the pole 12 structure will not be compact enough, and the material usage will be increased, resulting in an increase in production cost. When the thickness of the base 1222 is less than 0.5 mm, the base 1222 will not be able to resist the stress in normal use, and the boss 1223 will not be connected stably.

[0050] It should be noted that the thickness of the base 1222 can be set as needed, for example, the thickness of the base 1222 can be 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm or 1 mm, etc. Specifically, the present application does not limit this.

[0051] Referring to Figure 3 In an embodiment, the distance between the wall surface of the groove 1221 towards the second side 112 and the end surface of the main body portion 121 towards the second side 112 is L, wherein 1 mm≤L≤1.5 mm. In this way, when the welding operation is performed, if the distance L between the groove 1221 and the main body portion 121 is less than 1 mm, the welding heat may be directly transmitted to the main body portion 121, causing the main body portion 121 to overheat or even be welded through. By setting L in the range of 1 mm to 1.5 mm, a certain buffer space can be provided for the welding operation, effectively preventing the welding heat from directly damaging the main body portion 121. By setting L in the range of 1 mm to 1.5 mm, unnecessary material waste can be reduced on the premise of ensuring the welding quality and structural strength. When the distance between the wall surface of the groove 1221 towards the second side 112 and the end surface of the main body portion 121 towards the second side 112 is greater than 1.5 mm, the overall size of the connecting portion 122 may be increased, increasing the material usage and manufacturing cost.

[0052] It should be noted that the distance between the wall surface of the groove 1221 towards the second side 112 and the end surface of the main body portion 121 towards the second side 112 can be set as needed, for example, the distance between the wall surface of the groove 1221 towards the second side 112 and the end surface of the main body portion 121 towards the second side 112 can be 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm or 1.5 mm, etc. Specifically, the present application does not limit this.

[0053] Referring to Figure 4In an embodiment, the sealing ring 13 is provided with an annular groove 131 on the side facing the second side 112, and the annular groove 131 extends along the circumferential direction of the mounting hole 113. In this way, the annular groove 131 is arranged to facilitate the deformation of the sealing ring 13 to seal the gap between the connecting portion 122 and the inner side wall of the mounting hole 113 when the sealing ring 13 is subjected to external force. In addition, in actual use, the second side 112 of the cover plate 11 can be in a high-pressure environment. Under high pressure, the annular groove 131 can act as a stress concentration area, making the sealing ring 13 more likely to deform in these areas, increasing the contact area between the sealing ring 13 and the inner side wall of the mounting hole 113, allowing the sealing ring 13 to better fit the inner wall of the mounting hole 113, improving the sealing effect and reducing the possibility of leakage.

[0054] With reference to Figure 4 In an embodiment, the groove width of the annular groove 131 decreases in the direction from the second side 112 to the first side 111. In this way, high-pressure gas can enter the annular groove 131, and the high pressure can cause the two oppositely arranged side walls of the annular groove 131 to move in opposite directions to abut against the outer side wall of the connecting portion 122 and the inner side wall of the mounting hole 113, respectively, thereby enhancing the sealing effect. In addition, the design of decreasing groove width allows the sealing ring 13 to more evenly distribute stress during deformation, avoiding damage to the sealing ring 13 caused by excessive local stress.

[0055] The compression amount refers to the degree of compression of the sealing ring 13 during installation, which is usually expressed as the percentage of the difference between the free height and the installed height of the sealing ring 13 to the free height. It is a key parameter in the design and use of the sealing ring 13, directly affecting the sealing performance, service life, and installation convenience of the sealing ring 13. In an embodiment, the compression amount of the sealing ring 13 is K, where 15%≤K≤45%. When the compression amount is less than 15%, it can cause the sealing to be not tight enough, resulting in leakage problems. When the compression amount is greater than 45%, it can cause the sealing ring 13 to deform excessively, accelerate material aging, and even cause the sealing ring 13 to break, thereby shortening its service life. When the compression amount is greater than 45%, it can also increase the frictional resistance between the sealing ring 13 and the sealing surface, causing the sealing surface to wear more quickly. By setting the compression amount of the sealing ring 13 to be within the range of 15% to 45%, the sealing ring 13 can generally tightly fit the sealing surface to form an effective seal, and the sealing ring 13 can also have a longer service life.

[0056] It should be noted that the specific value of the compression amount of the sealing ring 13 can be selected as needed. For example, the compression amount of the sealing ring 13 can be 15%, 15%, 18%, 20%, 23%, 27%, 30%, 32%, 35%, 38%, 40%, 43%, or 45%, etc. Specifically, the present application does not limit this.

[0057] In an embodiment, the side wall of the sealing ring 13 is arranged to be inclined from the inside to the outside along the direction from the first side 111 to the second side 112, so that the sealing ring 13 is easier to be sleeved into the connecting portion 122 or pushed into the mounting hole 113 during installation. In a high-pressure environment, the inclined arrangement of the side wall of the sealing ring 13 helps to more evenly distribute the pressure on the sealing ring 13, reducing the phenomenon of local stress concentration, which helps to prolong the service life of the sealing ring 13 and reduce the leakage problem caused by uneven pressure.

[0058] In addition, the thickness of the side wall of the sealing ring 13 can also be arranged to increase from the first side 111 to the second side 112, so that the contact area between the sealing ring 13 and the outer side wall of the connecting portion 122 and / or the inner side wall of the mounting hole 113 can be increased, thereby improving the sealing effect.

[0059] Reference Figure 3 In an embodiment, the thickness of the main body portion 121 is H3 along the direction from the first side 111 to the second side 112, where 2mm≤H3≤2.5mm, so that when the thickness H3 of the main body portion 121 is set in the range of 2mm to 2.5mm, it can provide sufficient heat protection for the welding process, and this thickness range can effectively block the transmission of welding heat to the inside of the main body portion 121, thereby preventing the welding-through phenomenon of the main body portion 121 caused by overheating. During the welding process, when affected by welding heat, the main body portion 121 can better resist the risk of deformation and cracking, thereby ensuring the quality and reliability of the welded joint. By setting the thickness H3 of the main body portion 121 in the range of 2mm to 2.5mm, unnecessary material waste is reduced and costs are saved while ensuring welding quality and structural strength. When the thickness of the main body portion 121 is greater than 2.5mm, although the welding-through phenomenon can be avoided, there is a problem of material waste. When the thickness of the main body portion 121 is less than 2mm, there is a risk of insufficient strength of the main body portion 121 and easy welding-through.

[0060] It should be noted that the thickness of the main body portion 121 can be set as needed, for example, the thickness of the main body portion 121 can be 2mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm or 2.5mm, etc. Specifically, the present application does not limit this.

[0061] In an embodiment, the main body portion 121 is made of aluminum, so that in actual application, the main body portion 121 is usually used to be welded and fixed with the bar, and since the main body portion 121 is made of aluminum, the main body portion 121 made of aluminum is connected with the bar made of aluminum, so that the welding efficiency can be improved and the production cost can be reduced, and the conductivity of the pole 12 is improved.

[0062] Of course, in other embodiments, the material of the main body 121 can be selected as needed, which is not limited in the present application.

[0063] In an embodiment, the material of the connecting portion 122 includes copper, so that in actual use, the connecting portion 122 is usually used for welding and fixing with a copper connecting sheet. Since the material of the connecting sheet is usually copper, the copper connecting portion 122 is welded with the copper connecting sheet, so that the welding efficiency can be improved, the production cost is reduced, and the conductivity of the pole 12 is improved.

[0064] Of course, in other embodiments, the material of the connecting portion 122 can be selected as needed, which is not limited in the present application.

[0065] It should be noted that in other embodiments, the material of the main body 121 and the material of the connecting portion 122 can be the same, for example, both are aluminum or both are copper. Specifically, the present application is not limited in this regard.

[0066] Referring to Figure 5 In an embodiment, the hole diameter of the mounting hole 113 is at least partially increasing from the first side 111 to the second side 112, so that the contact area between the inner side wall of the mounting hole 113 and the sealing ring 13 is increased, the frictional resistance between the inner side wall of the mounting hole 113 and the sealing ring 13 is increased, and the connecting portion 122 sleeved with the sealing ring 13 is stably connected with the cover plate 11.

[0067] In an embodiment, the difference between the inner diameter of the mounting hole 113 adjacent to the first side 111 and the inner diameter of the mounting hole 113 adjacent to the second side 112 is Δ D, wherein 0<ΔD≤2.5mm, so that due to the installation process, the inner side wall of the mounting hole 113, the sealing ring 13 and the side wall of the groove 1221 are sequentially attached, which means that the side wall of the groove 1221 needs to be adapted to the inner side wall of the mounting hole 113. When the difference between the inner diameter of the mounting hole 113 adjacent to the first side 111 and the inner diameter of the mounting hole 113 adjacent to the second side 112 is between 0 and 2.5mm, the inclined arrangement of the side wall of the groove 1221 is easy to process, the operation is simple, and the sleeving of the sealing ring 13 is facilitated. When the difference between the inner diameter of the mounting hole 113 adjacent to the first side 111 and the inner diameter of the mounting hole 113 adjacent to the second side 112 is greater than 2.5mm, the processing operation of the inclined side wall of the groove 1221 is difficult, and the sleeving of the sealing ring 13 is not facilitated.

[0068] Referring to Figure 1In an embodiment, the top cover assembly 10 further comprises an upper plastic 14, the upper plastic 14 comprises an isolation portion 141 and a surrounding ring 142, the isolation portion 141 is arranged on the first side 111 to insulate and isolate the pole 12 and the cover plate 11, so as to effectively prevent the risk of short circuit or electric shock caused by current passing through an unintended path (such as air or moisture), and protect the safe operation of the circuit. The surrounding ring 142 is arranged along the circumference of the mounting hole 113, one end of the surrounding ring 142 is connected with the isolation portion 141, and the inner side wall of the surrounding ring 142 abuts against the outer side wall of the main body portion 121, so that an effective waterproof barrier is formed between the inner side wall of the surrounding ring 142 and the outer side wall of the main body portion 121, which can prevent external liquids (such as rainwater, cleaning agent, etc.) from entering the inside of the equipment and causing short circuit or damage. By abutting the inner side wall of the surrounding ring 142 against the outer side wall of the main body portion 121, the upper plastic 14 is connected with the pole 12 as a whole, thereby simplifying the installation steps.

[0069] Referring to Figure 1 In an embodiment, the thickness of the isolation portion 141 is H4, wherein 0.5mm≤H4≤1.5mm, so that the thickness H4 of the isolation portion 141 is between 0.5mm and 1.5mm, which is generally sufficient to provide the necessary electrical insulation to ensure that the pole 12 and the cover plate 11 do not come into accidental electrical contact, thereby preventing safety hazards such as short circuit and electric shock. The thickness H4 of the isolation portion 141 between 0.5mm and 1.5mm can increase its mechanical strength, so that it can resist the impact, vibration and extrusion forces from the outside, and protect the internal electrical elements from being damaged. When the thickness of the isolation portion 141 is greater than 1.5mm, although electrical insulation can be achieved, it will increase the material usage, resulting in increased production cost, and the structure of the top cover assembly 10 is not compact enough. When the thickness of the isolation portion 141 is less than 0.5mm, the electrical insulation will be poor.

[0070] It should be noted that the thickness of the isolation portion 141 can be selected as needed, for example, the thickness of the isolation portion 141 can be 0.5mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 1.1mm, 1.3mm or 1.5mm, etc. Specifically, the present application does not limit this.

[0071] The embodiment of the utility model further proposes a battery, the battery comprises the top cover assembly 10 as described above, and the specific structure of the top cover assembly 10 refers to the above embodiment. Since the battery adopts all the technical solutions of the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0072] The embodiment of the utility model discloses a kind of electric equipment, electric equipment includes battery as above, the specific structure of battery refers to above embodiment, since the present electric equipment has adopted all technical solutions of above all embodiments, at least have all beneficial effects brought by the technical scheme of above embodiment, here no longer one by one elaboration.

[0073] It should be noted that the electric device can be a vehicle, an energy storage power supply, a consumer electronic, a medical device, or a smart city, etc.

[0074] The above detailed the embodiments of the utility model, the principle and implementation mode of the utility model are described by applying specific examples in this paper, the above embodiment is only used to help understand the method and core idea of the utility model;At the same time, for those skilled in the art, according to the idea of the utility model, the specific implementation mode and application range will be changed, as described above, the content of the specification should not be understood as limiting the utility model.

Claims

1. A cap assembly, characterized by, The application relates to a top cover assembly of a battery, comprising: a cover plate having a first side and a second side arranged oppositely, the cover plate being provided with a mounting hole arranged through the first side and the second side; a pole column comprising a main body part and a connecting part, the main body part being arranged on the first side, the connecting part being at least partially arranged in the mounting hole, the connecting part being arranged to extend from the main body part towards the second side, a groove being arranged on one side of the connecting part towards the second side, a side wall of the groove being arranged to be inclined from the first side to the second side towards an inner side wall direction of the mounting hole; a sealing ring being elastically connected between an outer side wall of the connecting part and an inner side wall of the mounting hole.

2. The roof assembly of claim 1, wherein, A thickness of the side wall of the groove is H1, wherein 0.5mm<=H1<=1.5mm.

3. The roof assembly of claim 1, wherein, The connecting part comprises: a base arranged on the first side and connected with the main body part; a boss being arranged on one side of the base towards the second side, the boss being arranged to extend into the mounting hole, the boss forming the groove.

4. The roof assembly of claim 3, wherein, A thickness of the base is H2, wherein 0.5mm<=H2<=1mm.

5. The roof assembly of any one of claims 1 to 4, wherein, A distance between a wall surface of the groove towards the second side and an end surface of the main body part towards the second side is L, wherein 1mm<=L<=1.5mm.

6. The roof assembly of any one of claims 1 to 4, wherein, One side of the sealing ring towards the second side is provided with an annular groove arranged along a circumferential direction of the mounting hole.

7. The roof assembly of claim 6, wherein, A groove width of the annular groove is arranged to decrease from the second side to the first side.

8. The roof assembly of any one of claims 1 to 4, wherein, A compression amount of the sealing ring is K, wherein 15%<=K<=45%.

9. The roof assembly of any one of claims 1 to 4, wherein, In a direction from the first side to the second side, a thickness of the main body part is H3, wherein 2mm<=H3<=2.5mm.

10. The roof assembly of any one of claims 1 to 4, wherein, A material of the main body part comprises aluminum and / or a material of the connecting part comprises copper.

11. The roof assembly of any one of claims 1 to 4, wherein, A hole diameter of the mounting hole is arranged to increase at least partially from the first side to the second side.

12. The roof assembly of claim 11, wherein, A difference between an inner diameter of the mounting hole adjacent to the first side and an inner diameter of the mounting hole adjacent to the second side is AD, wherein 0<AD<=2.5mm.

13. The roof assembly of any one of claims 1 to 4, wherein, The application further relates to a battery comprising the top cover assembly. The application further relates to a battery comprising the top cover assembly. ​ 14. The roof assembly of claim 13, wherein, ​ 15. A battery, characterized by ​ 16. An electrical device, characterized by ​

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