Top cover assembly and battery

Abstract

The utility model relates to the technical field of batteries, and discloses a top cover component and a battery, the top cover component comprises a top cover plate and a pole mounting component, the top cover plate is provided with a mounting hole, two ends of the mounting hole are respectively provided with an annular support part and an annular press-fit edge which are opposite to each other, and the pole mounting component is mounted in the mounting hole. Comprising a pole, an insulation fixing piece and a sealing ring, an exhaust groove is formed in the outer wall of one side of the periphery of the insulation fixing piece, and the exhaust groove extends to the bottom end edge from the top end edge of the outer wall of the insulation fixing piece in the extension direction of the axis of the insulation fixing piece; the insulating fixing piece is sleeved on the peripheral side of the pole and is clamped between the annular pressing edges of the annular supporting part, and the sealing ring is sleeved on the peripheral side of the end part, facing the interior of the battery, of the pole and is arranged between the pole and the annular supporting part. According to the top cover assembly, the pole assembling structure is simple and reliable, the assembling and connecting reliability is high, the number of assembling parts is small, the mass of the top cover assembly is reduced, and the energy density of the battery can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a top cover assembly and a battery. Background Art

[0002] In addition to the welding process, the pole structure of the traditional battery top cover has also introduced a rolling assembly process, which reserves a flange on the top cover, installs the pole and some insulating components on the top cover, and uses rolling to press the flange onto the insulating components to fix the pole. However, in the current rolling assembly process, there are many parts, which makes the assembly structure complex and increases the weight. The installation stability of many parts is also poor, and it is easy to twist, causing the pole to twist. Utility Model Content

[0003] The utility model aims to provide a top cover assembly and a battery, wherein the top cover assembly and the pole assembly structure are simple and reliable, the assembly connection reliability is strong, the sealing effect is good, and the mass of the top cover assembly is reduced, which is beneficial to improving the battery energy density.

[0004] In order to achieve the above object, the utility model provides the following technical solutions:

[0005] A top cover assembly, comprising:

[0006] A top cover plate, wherein the top cover plate has a pole mounting hole, an annular support portion is arranged at the bottom of the pole mounting hole facing the inner side of the top cover plate; an annular pressing edge is arranged on the top peripheral side of the pole mounting hole and is opposite to the annular support portion;

[0007] A pole mounting assembly installed in the pole mounting hole, the pole mounting assembly comprising: a pole, an insulating fixing and a sealing ring, wherein: an exhaust groove is provided on the outer wall on the outer circumference side of the insulating fixing, and in the extension direction of the axial center line of the insulating fixing, the exhaust groove extends from the top edge of the outer wall of the insulating fixing to the bottom edge; the insulating fixing is sleeved on the outer circumference side of the pole and fixed to the pole, and the sealing ring is sleeved on the outer circumference side of the end of the pole facing the inner end of the battery and fixed to the pole; the insulating fixing is at least partially located in the mounting hole, and the insulating fixing is clamped between the annular support portion and the annular pressing edge; the sealing ring is arranged between the pole and the annular support portion.

[0008] The above-mentioned top cover assembly has a simple structure and fewer assembly parts, which reduces the mass of the top cover assembly and is beneficial to improving the energy density of the battery; it is easy to assemble, and the outer periphery of the insulating fixing part and the side wall in the mounting hole match well, so good fixation can be achieved, and the insulating fixing part is clamped between the annular support part and the annular pressing edge up and down, the assembly connection has strong reliability, and the sealing ring achieves a good sealing effect.

[0009] Optionally, at least one first anti-rotation groove is provided on the side wall of the inner peripheral side of the pole mounting hole;

[0010] The pole comprises a column portion and an annular convex edge arranged on the circumference of the column portion, a portion of the column portion located on one side of the annular convex edge forms a first column, and a portion of the column portion located on the other side of the annular convex edge forms a second column, an end surface of the second column away from the annular convex edge is used to face the inside of the battery, the annular convex edge has a first annular surface facing the first column, and a second annular surface facing the second column, and an anti-rotation notch is arranged on the outer circumferential surface of the annular convex edge;

[0011] The insulating fixing member includes a first insulating tube sleeved on the circumferential side of the annular convex edge, a second insulating tube sleeved on the first column, and an annular wall connecting the first insulating tube and the second insulating tube, the annular wall is fitted to the first annular surface, and the end of the first insulating tube away from the second insulating tube is provided with an annular extension edge extending toward the axial center line of the first insulating tube, and the inner side of the annular extension edge cooperates with the outer edge of the second annular surface; the inner wall of the first insulating tube is provided with a first protrusion protruding inwardly and cooperating with the anti-rotation notch, and the outer wall of the first insulating tube is provided with a second protrusion protruding outwardly and cooperating with the first anti-rotation groove; the annular extension edge is in contact with the annular support portion, and the annular pressing edge is pressed on the annular wall;

[0012] The sealing ring comprises a sealing cylinder sleeved on the second column, and one end of the sealing cylinder facing the annular ridge has an outwardly extending annular sealing ridge, and the annular sealing ridge is clamped between the second annular surface and the annular support portion.

[0013] Optionally, a second anti-rotation groove corresponding one-to-one to and connected to each of the first anti-rotation grooves is provided on the inner wall of the annular pressing edge, and a third protrusion corresponding one-to-one to the second protrusion is provided on the side of the annular wall away from the first annular surface, and the first protrusions and the third protrusions corresponding to each other are connected, and the third protrusion cooperates with the second anti-rotation groove.

[0014] Optionally, two first anti-rotation grooves are provided.

[0015] Optionally, the outer peripheral side of the annular protrusion has a trimming plane, the trimming plane and the portion corresponding to the outer peripheral edge of the annular protrusion form the anti-rotation notch, and two trimming planes are provided, and the two trimming planes are respectively provided on two opposite sides of the outer periphery of the annular protrusion; or,

[0016] The anti-rotation notch is a "V"-shaped notch with the opening facing outward; or

[0017] The anti-rotation notch is a trapezoidal notch, and the cross-sectional shape of the trapezoidal notch along the axial line perpendicular to the annular convex edge is a trapezoid. The length of the upper base of the trapezoid is smaller than the length of the lower base of the trapezoid, and the lower base is located on the side of the upper base away from the axial line of the annular convex edge.

[0018] Optionally, the first column body includes a first column segment and a second column segment, the first column segment is connected to the annular convex edge, and the second column segment is located at an end of the first column segment away from the annular convex edge; the diameter of the first column segment is larger than the diameter of the second column segment, and the surface of the outer periphery of the first column segment facing the first column segment forms an annular step surface;

[0019] The second insulating tube is sleeved on the outer peripheral side of the first column segment, and one end of the second insulating tube away from the annular wall is provided with an overlapping edge extending toward the axial center line of the second insulating tube, and the overlapping edge overlaps the annular step surface.

[0020] Optionally, an annular step groove is provided on the inner wall of the sealing cylinder and at one end facing the sealing ridge, and along the extension direction of the axial centerline of the sealing cylinder, the depth of the annular step groove is less than the thickness of the annular sealing ridge.

[0021] Optionally, two pole mounting holes are provided on the top cover plate; two pole mounting assemblies are provided, which are divided into a positive pole mounting assembly and a negative pole mounting assembly; and when two first anti-rotation grooves are provided in the two insulating fixings in the positive pole mounting assembly and the negative pole mounting assembly, the interval between the two first anti-rotation grooves in the insulating fixing of the positive pole mounting assembly is different from the interval between the two first anti-rotation grooves in the insulating fixing of the negative pole mounting assembly.

[0022] Optionally, an exhaust groove is provided on the outer wall on the outer circumference side of the insulating fixture, and in the extension direction of the axial line of the insulating fixture, the exhaust groove extends from the top edge to the bottom edge of the outer wall of the insulating fixture.

[0023] Optionally, an explosion-proof hole is further provided on the top cover plate, and the top cover assembly further includes a lower plastic plate and an explosion-proof valve, wherein the lower plastic plate is arranged opposite to the top cover plate and is located on the side of the top cover plate facing the interior of the battery; the lower plastic plate is provided with an opening corresponding to the pole mounting hole, and a plurality of air holes corresponding to the explosion-proof hole, the explosion-proof valve is installed in the explosion-proof hole, and an explosion-proof valve patch is attached to the explosion-proof hole on the side of the top cover plate away from the lower plastic plate, and the explosion-proof valve patch is used to cover the explosion-proof hole.

[0024] The present solution also provides a battery, comprising any one of the top cover assemblies provided by the above technical solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation on the present invention. Among them:

[0026] Figure 1 An exploded view of the structure of a top cover assembly provided by an embodiment of the utility model;

[0027] Figure 2 A top view of a top cover assembly provided by an embodiment of the utility model;

[0028] Figure 3 for Figure 2 Schematic diagram of the cross section along AA;

[0029] Figure 4 A partial cross-sectional schematic diagram of a top cover assembly provided by an embodiment of the utility model;

[0030] Figure 5 A schematic diagram of a mounting hole of a top cover assembly provided in an embodiment of the utility model;

[0031] Figure 6 A schematic diagram of the structure of an insulating fixing member provided in an embodiment of the utility model;

[0032] Figure 7 A schematic diagram of the structure of a pole provided by an embodiment of the utility model;

[0033] Figure 8 A schematic front view of a pole provided in an embodiment of the utility model;

[0034] Fig. 9 A schematic top view of a pole provided in an embodiment of the utility model;

[0035] Fig.10 A schematic top view of a pole provided in an embodiment of the utility model;

[0036] Fig.11 A schematic diagram of the structure of a sealing ring provided in an embodiment of the utility model;

[0037] Fig.12 The present invention is a front view schematic diagram of a sealing ring provided in an embodiment of the present invention.

[0038] Icons: 1-top cover; 2-pole mounting assembly; 3-lower plastic plate; 4-explosion-proof valve; 5-explosion-proof valve patch; 11-pole mounting hole; 12-explosion-proof hole; 21-pole; 22-insulating fixing piece; 23-sealing ring; 31-opening; 32-vent hole; 111-annular support; 112-first anti-rotation groove; 113-annular pressing edge; 114-second anti-rotation groove; 211-first column; 212-second column; 213-annular convex edge; 221-first An insulating tube; 222-a second insulating tube; 223-annular wall; 224-annular extension edge; 225-a second protrusion; 226-a third protrusion; 227-an overlapping edge; 228-an exhaust groove; 231-a sealing tube; 232-annular sealing convex edge; 2111-a first column section; 2112-a second column section; 2113-annular step surface; 2131-a first annular surface; 2132-a second annular surface; 2133-an anti-rotation notch; 2311-annular step groove. DETAILED DESCRIPTION

[0039] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments. Each example is provided by way of explanation of the present invention and does not limit the present invention. In fact, it will be clear to those skilled in the art that modifications and variations may be made in the present invention without departing from the scope or spirit of the present invention. For example, a feature shown or described as a part of one embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desired that the present invention includes such modifications and variations within the scope of the appended claims and their equivalents.

[0040] In the description of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention. The terms "connected", "connected" and "set" used in the present invention should be understood in a broad sense. For example, they can be fixedly connected or detachably connected; they can be directly connected or indirectly connected through an intermediate component. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0041] refer to Figure 1 , Figure 2 and Figure 3 As shown, the utility model provides a top cover assembly, which is used to cooperate with the top opening of the battery housing and is sealed and connected to the top of the battery housing. Figure 1 and Figure 5As shown, the top cover assembly of this embodiment includes: a top cover plate 1 and a pole mounting assembly 2, the side of the top cover plate 1 facing the opening of the battery shell is the inner side of the top cover plate 1, and the side of the top cover plate 1 facing away from the battery shell is the inner side of the top cover plate 1, and for the convenience of explanation, the direction from the inner side of the top cover plate 1 to the outside is vertically upward. Among them, the top cover plate 1 has a pole mounting hole 11, and the bottom of the pole mounting hole 11 facing the inner side of the top cover plate 1 is provided with an annular support portion 111, and the surface of the annular support portion 111 facing the inside of the mounting hole forms a supporting surface; the top peripheral side of the pole mounting hole 11 is provided with an annular pressing edge 113 opposite to the annular supporting portion 111, the top of the pole mounting hole 11 is opposite to the bottom, the top of the pole mounting hole 11 faces the outside of the top cover plate 1, and a accommodating space is formed between the annular pressing edge 113 and the annular supporting portion 111. The pole mounting assembly 2 is installed in the pole mounting hole 11, and the pole mounting assembly 2 includes a pole 21, an insulating fixture 22 and a sealing ring 23. The insulating fixture 22 is sleeved on the outer peripheral side of the pole 21 and fixed to the pole 21. Exemplarily, the insulating fixture 22 is injection molded on the outer peripheral side of the pole 21 and fixed to the pole 21. The sealing ring 23 is sleeved on the outer peripheral side of the end of the pole 21 facing the inside of the battery and fixed to the pole 21. The insulating fixture 22 is at least partially located in the mounting hole 11. The insulating fixture 22 is clamped between the annular support portion 111 and the annular pressing edge 113, so that the pole 21 can be fixed in the mounting hole; the sealing ring 23 is located between the pole 21 and the annular support portion 111, so that the pole and the annular support portion are sealed. Figure 6 As shown, an exhaust groove 228 is provided on the outer wall of the outer circumference of the insulating fixture 22, and the exhaust groove 228 extends from the top edge to the bottom edge of the outer wall of the insulating fixture 22 in the extension direction of the axis of the insulating fixture 22. This allows the insulating fixture 22 and the pole 21 to be effectively exhausted during injection molding, reduces bubbles during molding of the insulating structural member, ensures that the structure of the insulating fixture 22 is good, and especially ensures that the outer circumference of the insulating fixture is free of bubbles and remains good, so that the outer circumference of the insulating fixture can be well matched with the inner wall of the mounting hole to achieve good fixation.

[0042] Therefore, the above-mentioned top cover assembly has a simple structure, fewer assembly parts, and reduces the mass of the top cover assembly, which is beneficial to improving the battery energy density; it is easy to assemble, and the outer periphery of the insulating fixing part and the side wall in the mounting hole match well, which can achieve good fixation, and the insulating fixing part is clamped between the annular support part and the annular pressing edge up and down, the assembly connection reliability is strong, and the sealing ring achieves a good sealing effect.

[0043] Specifically, Figure 1 and Figure 8As shown, at least one first anti-rotation groove 112 is provided on the side wall of the inner circumferential side of the pole mounting hole 11; the pole 21 includes a column portion and an annular convex edge 213 provided on the circumferential side of the column portion, along the axial centerline direction of the column portion, the annular convex edge 213 is located in the middle of the column portion, the portion of the column portion located on one side of the annular convex edge 213 forms a first column 211, and the portion of the column portion located on the other side of the annular convex edge 213 forms a second column 212, the first column 211 is used to face the outside of the top cover plate 1, and is used to connect with the external connector of the battery, the second column 212 faces the inside of the top cover plate 1, and the end surface of the second column 212 away from the annular convex edge 213 is used to face the inside of the battery; the annular convex edge 213 has a first annular surface 2131 facing the first column 211, and a second annular surface 2132 facing the second column 212, and the outer circumferential surface of the annular convex edge 213 is provided with an anti-rotation notch 2133.

[0044] like Figure 4 and Figure 6As shown, the insulating fixing member 22 is formed of a hard material, has a certain hardness, is a rigid structure, and the insulating fixing member 22 itself is an integrated structure. The insulating fixing member 22 specifically includes a first insulating tube 221 sleeved on the circumferential side of the annular convex edge 213, a second insulating tube 222 sleeved on the first column 211, and an annular wall 223 connecting the first insulating tube 221 and the second insulating tube 222. The first insulating tube 221 and the second insulating tube 222 are coaxially arranged, and the diameter of the first insulating tube 221 is larger than that of the second insulating tube 222. The second insulating tube 222 is above the first insulating tube 221. The top end of the first insulating tube 221 and the bottom end of the second insulating tube 222 are connected by the annular wall 223. The annular wall 223 is attached to the first annular surface 2131. The end of the first insulating tube 221 away from the second insulating tube 222 is provided with an annular extension edge 224 extending toward the axis of the first insulating tube 221. The inner side of the annular extension edge 224 By contacting and engaging with the outer edge of the second annular surface 2132, the pole 21 is engaged with the insulating fixing piece 22 through multiple surfaces and is firmly connected, and the annular extension edge 224 and the annular wall 223 can clamp the annular convex edge 213 of the pole 21 in the up and down directions, so that the insulating fixing piece 22 and the pole 21 are firmly fixed together; in addition, a first protrusion that protrudes inward and cooperates with the anti-rotation notch 2133 is provided on the inner wall of the first insulating tube 221. The first protrusion is engaged and connected with the anti-rotation notch 2133 on the pole, which can limit the pole and the insulating fixing piece 22 in the circumferential direction, so that the pole 21 and the insulating fixing piece 22 are fixed in the circumferential direction, prevent the pole 21 and the insulating fixing piece 22 from rotating in the circumferential direction, and ensure that the connection between the pole 21 and the insulating fixing piece 22 is firm. During installation, the first insulating tube 221, the annular wall 223 and the annular extension edge 224 are located in the accommodating space, the outer wall of the first insulating tube 221 cooperates with the side wall inside the mounting hole, and the outer wall of the first insulating tube 221 is provided with a second protrusion 225 that protrudes outward and cooperates with the first anti-rotation groove 112; the annular extension edge 224 abuts against the supporting surface of the annular support portion 111, and the annular pressing edge 113 is pressed on the annular wall 223, and the annular support portion 111 and the annular pressing edge 113 fix and clamp the insulating fixing 22 and the pole 21 in the up and down directions, and the first anti-rotation groove 112 and the second protrusion 225 cooperate to form a snap-fit ​​structure to prevent the insulating fixing 22 from circumferentially rotating around the mounting hole, thereby playing an anti-rotation role and making the connection between the insulating fixing 22 and the mounting hole firm and reliable.

[0045] Combination Figure 4 ,like Fig.11 and Fig.12As shown, the sealing ring 23 is an insulating flexible structure with a certain elasticity, and can be an apron, such as rubber. Specifically, the sealing ring 23 includes a sealing cylinder 231 sleeved on the second column 212, and the sealing cylinder 231 has an outwardly extending annular sealing ridge 232 at one end facing the annular ridge 213, and the annular sealing ridge 232 is clamped between the second annular surface 2132 and the annular support portion 111. The annular sealing ridge is pressed between the second annular surface 2132 of the pole 21 and the supporting surface of the annular support portion 111, and plays a good sealing role. The thickness of the annular sealing ridge 232 is greater than the thickness of the annular extension ridge 224. When installing, the annular sealing ridge 232 is squeezed in the vertical direction, but there is an annular seal of the insulating fixing member 22 between the second annular surface 2132 and the supporting surface of the annular support portion 111. The extended edge 224 plays a role of rigid support, which can effectively prevent the annular sealing ridge 232 of the sealing ring 23 from being over-extruded, thereby preventing the annular sealing ridge 232 from being damaged, thereby ensuring that the sealing performance of the sealing ring 23 remains good, and the sealing cylinder 231 is sleeved on the second column 212, and the sealing cylinder 231 and the second column 212 are sealed. The outer wall of the sealing cylinder 231 and the edge of the annular support portion 111 are abutted against each other, which can also play a sealing role. Then, the sealing ring 23 forms a seal at the edge of the annular support portion 111, and another seal is formed between the annular support portion 111 and the second annular surface 2132, forming two seals between the pole 21 and the pole mounting hole 11, thereby enhancing the sealing effect.

[0046] In the above-mentioned top cover assembly, through the structural setting of the pole, and the matching setting of an insulating fixing part and a sealing ring, the pole and the pole mounting hole are insulated and more firmly installed, and the pole and the mounting hole are sealed, which greatly simplifies the structural parts of the pole assembly, reduces the use of parts, reduces the weight of the top cover, is conducive to reducing the overall weight of the battery, and improves the energy density. In addition, the insulating fixing part is wrapped on the outer peripheral side of the pole and matched with the pole through multiple surfaces, and the two are firmly limited to each other in the axial and circumferential directions, and the connection reliability is strong; the insulating fixing part and the mounting hole are matched, and the insulating fixing part and the mounting hole are also firmly limited to each other in the axial and circumferential directions, and the connection is reliable. On the inner side of the top cover plate, the mounting hole and the pole are tightly sealed by the sealing ring to achieve a good sealing effect. In addition, these components can be used as standard parts and mass-produced to reduce production costs.

[0047] In a possible implementation, Figure 5 and Figure 6As shown, the inner wall of the annular pressing edge 113 is provided with second anti-rotation grooves 114 corresponding to and connected to each first anti-rotation groove 112, and the side of the annular wall 223 away from the first annular surface 2131 is provided with a third protrusion 226 corresponding to the second protrusion 225, and the first protrusions and the third protrusions 226 corresponding to each other are connected, and the third protrusion 226 cooperates with the second anti-rotation groove 114. The first anti-rotation groove 112 and the second anti-rotation groove 114 are snap-fitted and connected, which can also play an anti-rotation role, further enhancing the anti-rotation effect between the insulating fixing member 22 and the mounting hole. In addition, when the pole is installed, after the pole structure is completed, the insulating fixing part 22 needs to be set on the side of the pole 21 through the injection molding process. The insulating fixing part 22 is connected and fixed to the pole 21. The side wall of the mounting hole on the top cover plate 1 is located on the outside and is vertical. A vertically extending guide groove is provided on the inner side of the side of the mounting hole. The guide groove can be matched with the first protrusion and the second protrusion in size. The first protrusion can be snapped into the guide groove. The axial line of the insulating fixing part 22 is also vertically set, and the opening on the upper side of the mounting hole is installed downward. Then, the side wall of the mounting hole is pressed toward the insulating fixing part 22 by rolling above the mounting hole. The part of the annular wall 223 of the upper side of the side wall of the mounting hole that is bent and overlapped with the insulating fixing part 22 forms an annular pressing edge 113, and a part of the guide groove forms a first anti-rotation groove 112, and the other part forms a second anti-rotation groove 114.

[0048] Exemplarily, with respect to the setting of the anti-rotation limiting structure, two first anti-rotation grooves may be provided, and the two first anti-rotation grooves are spaced apart on the inner wall of the peripheral side of the mounting hole, which can improve the anti-rotation effect.

[0049] Among them, the shape of the first anti-rotation groove can be a rectangular groove, the second anti-rotation groove is also set to a rectangular groove, and the shape of the first protrusion is a rectangular protrusion block that cooperates with the strip groove, and the third protrusion is a liquid level rectangular protrusion block, which is simple to manufacture and can simplify the manufacturing process.

[0050] There are multiple options for setting the anti-rotation notch, such as:

[0051] Method 1:

[0052] like Figure 8 and Fig. 9As shown, the outer peripheral side of the annular convex edge 213 has a cutting plane, and the cutting plane and the position corresponding to the outer periphery of the annular convex edge 213 form an anti-rotation notch 2133, and there are two cutting planes, which are respectively arranged on two opposite sides of the outer periphery of the annular convex edge 213, and a part of the outer periphery of the annular convex edge 213 is directly cut off to form the cutting plane, so that a notch is formed on the outer circle of the annular convex edge 213, and similarly, the second protrusion is a structure that cooperates with the notch on the outer circle of the annular convex edge 213. Directly cutting a plane on the outer circle of the annular flange to achieve anti-rotation has a simple structure, is easy to manufacture, and has a better anti-rotation effect.

[0053] Method 2:

[0054] like Fig.10 As shown, the anti-rotation notch 2133 is configured as a "V"-shaped notch with its opening facing outward, and a plurality of "V"-shaped notches can be configured, so that the "V"-shaped notches are arranged at intervals, and the second protrusion is correspondingly a pointed protruding tooth shape, which cooperates with the "V"-shaped notch, is firmly snapped in, and the anti-rotation effect is increased.

[0055] Method 3:

[0056] The anti-rotation notch is set as a trapezoidal notch, and the cross-sectional shape of the trapezoidal notch along the axis perpendicular to the annular convex edge is a trapezoid, and the length of the upper base of the trapezoid is less than the length of the lower base of the trapezoid, and the lower base is located on the side of the upper base away from the axis of the annular convex edge. The second protrusion is set as an inverted trapezoidal protrusion that is buckled with the trapezoidal notch, and the clamping is firm to enhance the anti-rotation effect.

[0057] In an optional embodiment, in order to further enhance the connection firmness between the pole and the insulating fixture, so that the pole can be stably installed in the mounting hole along with the insulating fixture, refer to Figure 4 and Figure 6 , Figure 7 As shown, the first column 211 is set as a column with a specific step structure. Exemplarily, the first column 211 includes a first column segment 2111 and a second column segment 2112. The first column segment 2111 is connected to the annular flange 213, and the second column segment 2112 is located at the end of the first column segment 2111 away from the annular flange 213; the diameter of the first column segment 2111 is larger than the diameter of the second column segment 2112, and the first column segment 2111 and the second column segment 2112 form a step structure, a step is formed between the first column segment 2111 and the second column segment 2112, and an annular step surface 2113 is formed on the surface of the outer periphery of the first column segment 2111 facing the first column segment 2111.

[0058] On the other hand, the second insulating tube 222 is specifically sleeved on the outer peripheral side of the first column section 2111, and the end of the second insulating tube 222 away from the annular wall 223 is provided with an annular lap edge 227 extending toward the axis of the second insulating tube 222, and the lap edge 227 overlaps the annular step surface 2113. Then, in the vertical direction, between the insulating fixing member 22 and the pole 21, the bottom is overlapped and clamped by the annular extension edge 224 and the second annular extension surface, and the top is overlapped by the annular wall 223 on the first annular surface 2131, and the lap edge 227 overlaps the annular step surface 2113, which is firm and reliable. When installed in the installation hole, the annular pressing edge 113 is pressed downward on the annular wall 223, and the edge of the annular pressing edge 113 contacts and cooperates with the outer wall of the second insulating tube 222, and abuts against the outer wall of the second insulating tube 222, so that the installation of the insulating fixing member 22 is more stable, and there is also an lap edge 227 on the pole 21 to overlap and buckle, thereby enhancing the stability of the pole.

[0059] In other aspects, in order to ensure the sealing effect, combined with Figure 4 like Fig.11 As shown, the structure of the sealing ring 23 itself will not cause structural interference when cooperating with other components. An annular step groove 2311 is provided on the inner wall of the sealing cylinder 231 and at one end facing the sealing ridge. Along the extension direction of the axial center line of the sealing cylinder 231, the depth of the annular step groove 2311 is less than the thickness of the annular sealing ridge 232. When the sealing ring 23 is sleeved on the pole 21, the sealing cylinder 231 cooperates with the second column 212, the sealing ridge cooperates with the second annular surface 2132, and the corner of the inner wall of the sealing cylinder 231 facing upwards corresponds to the corner connected to the second column 212 and the sealing ridge. Since there will be deviations in the manufacturing dimensions of the parts, there may be interference between the corner of the inner wall of the sealing cylinder 231 facing upwards and the corner connected to the second column 212 and the sealing ridge, so that the corner on the upper side of the inner wall of the sealing cylinder 231 is squeezed, causing the sealing cylinder 231 to have a certain deformation, which may affect the sealing effect. Therefore, an annular step groove 2311 is provided on the inner wall of the sealing cylinder 231 and on the end facing the sealing ridge to form an avoidance groove, which effectively avoids interference between the assembly matching structures and ensures the sealing effect of the sealing ring 23.

[0060] In a feasible implementation, if Figure 1As shown, there are two pole mounting holes 11 on the top cover plate 1, one for mounting the positive pole and the other for mounting the negative pole, so there are two pole mounting assemblies 2, which are divided into a positive pole mounting assembly and a negative pole mounting assembly, the pole in the positive pole mounting assembly is a positive pole, the pole in the negative pole mounting assembly is a negative pole, and the appearance structure of the positive pole and the negative pole is the same, and the positive pole mounting assembly and the negative pole mounting assembly are the same except that the positive and negative poles are different, and the structures of other components are the same. In order to distinguish the two pole mounting assemblies, two first anti-rotation grooves 112 are provided in the two insulating fixings 22 in the positive pole mounting assembly and the negative pole mounting assembly, and the interval between the two first anti-rotation grooves 112 in the insulating fixing 22 of the positive pole mounting assembly is different from the interval between the two first anti-rotation grooves 112 in the insulating fixing 22 of the negative pole mounting assembly.

[0061] In order to make it easy to distinguish the positive electrode column from the negative electrode column, for example, refer to Figure 6 As shown, different identification structures can also be set on the outer walls of the insulating fixtures 22 of the positive pole mounting assembly 2 and the negative pole mounting assembly 2. For example, a "+"-shaped identification can be set on the outer wall of the insulating fixture 22 of the positive pole mounting assembly 2, and a "-"-shaped identification can be set on the outer wall of the insulating fixture 22 of the negative pole mounting assembly 2. It should be noted that the position of the identification can be selected according to actual needs, as long as it can be exposed on the outside and easily seen.

[0062] The negative electrode column includes a copper part and an aluminum part located on the upper side of the copper part, wherein the aluminum part includes a first column and a partial annular protrusion on the upper side, and a second column extending downward, and the copper part includes a copper outer layer wrapped around the outer circumference of the second column, and an annular copper layer connected to the copper outer layer and attached to the lower side of the partial annular protrusion.

[0063] In a possible implementation, Figure 1As shown, the top cover plate 1 is also provided with an explosion-proof hole 12, and the top cover assembly also includes a lower plastic plate 3 and an explosion-proof valve 4. The lower plastic plate 3 is arranged opposite to the top cover plate 1 and is located on the side of the top cover plate 1 facing the inside of the battery; the lower plastic plate 3 is provided with an opening 31 corresponding to the pole mounting hole 11, and a plurality of vent holes 32 corresponding to the explosion-proof hole 12, and the explosion-proof valve 4 is installed on the explosion-proof hole 12. The side of the top cover plate 1 away from the lower plastic plate 3 is attached with an explosion-proof valve patch 5 located at the explosion-proof hole 12, and the explosion-proof valve patch 5 is used to cover the explosion-proof hole 12. The explosion-proof valve 4 is a component in a normally closed state, which is closed in a normal state. At the top cover plate 1, the inside of the battery is not connected to the outside world. When the temperature inside the battery is too high, or for other reasons, the air pressure inside the battery will increase. When it increases to the preset pressure value of the explosion-proof valve 4, the explosion-proof valve 4 will open, so that the inside of the battery is connected to the outside world, reducing the air pressure inside the battery and ensuring the safety of the battery.

[0064] Specifically, the lower plastic plate can be a strip plate. In the length extension direction of the lower plastic plate, three reinforcement areas are arranged at intervals in the lower plastic plate, and a reinforcement area is respectively arranged at both ends of the lower plastic plate in the length extension direction. Each reinforcement area is provided with a corrugated structural plate, and the wave extension direction of the corrugated structural plate is perpendicular to the length extension direction of the lower plastic plate. The corrugated structural plate can effectively enhance the structural strength of the lower plastic plate.

[0065] Under the same design concept, this embodiment also provides a battery, including any one of the top cover components provided in the above embodiments, and a shell connected to the top cover component, the shell having an opening above, the top cover component being connected to the opening of the shell and being sealed to the shell.

[0066] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A top cover assembly, characterized in that: include: A top cover plate, wherein the top cover plate has a pole mounting hole, an annular support portion is arranged at the bottom of the pole mounting hole facing the inner side of the top cover plate; an annular pressing edge is arranged on the top peripheral side of the pole mounting hole and is opposite to the annular support portion; A pole mounting assembly installed in the pole mounting hole, the pole mounting assembly comprising: a pole, an insulating fixing and a sealing ring, wherein: an exhaust groove is provided on the outer wall on the outer circumference side of the insulating fixing, and in the extension direction of the axial center line of the insulating fixing, the exhaust groove extends from the top edge of the outer wall of the insulating fixing to the bottom edge; the insulating fixing is sleeved on the outer circumference side of the pole and fixed to the pole, and the sealing ring is sleeved on the outer circumference side of the end of the pole facing the inner end of the battery and fixed to the pole; the insulating fixing is at least partially located in the mounting hole, and the insulating fixing is clamped between the annular support portion and the annular pressing edge; the sealing ring is arranged between the pole and the annular support portion.

2. The top cover assembly according to claim 1, characterized in that: At least one first anti-rotation groove is provided on the side wall of the inner peripheral side of the pole mounting hole; The pole comprises a column portion and an annular convex edge arranged on the circumference of the column portion, a portion of the column portion located on one side of the annular convex edge forms a first column, and a portion of the column portion located on the other side of the annular convex edge forms a second column, an end surface of the second column away from the annular convex edge is used to face the inside of the battery, the annular convex edge has a first annular surface facing the first column, and a second annular surface facing the second column, and an anti-rotation notch is arranged on the outer circumferential surface of the annular convex edge; The insulating fixing member includes a first insulating tube sleeved on the circumferential side of the annular convex edge, a second insulating tube sleeved on the first column, and an annular wall connecting the first insulating tube and the second insulating tube, the annular wall is fitted to the first annular surface, and the end of the first insulating tube away from the second insulating tube is provided with an annular extension edge extending toward the axial center line of the first insulating tube, and the inner side of the annular extension edge cooperates with the outer edge of the second annular surface; the inner wall of the first insulating tube is provided with a first protrusion protruding inwardly and cooperating with the anti-rotation notch, and the outer wall of the first insulating tube is provided with a second protrusion protruding outwardly and cooperating with the first anti-rotation groove; the annular extension edge is in contact with the annular support portion, and the annular pressing edge is pressed on the annular wall; The sealing ring comprises a sealing cylinder sleeved on the second column, and one end of the sealing cylinder facing the annular ridge has an outwardly extending annular sealing ridge, and the annular sealing ridge is clamped between the second annular surface and the annular support portion.

3. The top cover assembly according to claim 2, characterized in that: The inner wall of the annular pressed edge is provided with second anti-rotation grooves corresponding one-to-one and connected to each of the first anti-rotation grooves, and the side of the annular wall away from the first annular surface is provided with third protrusions corresponding one-to-one to the second protrusions, and the corresponding first protrusions and the third protrusions are connected, and the third protrusion cooperates with the second anti-rotation grooves.

4. The top cover assembly according to claim 2, characterized in that: There are two first anti-rotation grooves.

5. The top cover assembly according to claim 2, characterized in that: The outer peripheral side of the annular protrusion has a cutting plane, and the anti-rotation notch is formed at a position corresponding to the cutting plane and the outer peripheral edge of the annular protrusion, and two cutting planes are provided, and the two cutting planes are respectively provided on two opposite sides of the outer periphery of the annular protrusion; or, The anti-rotation notch is a "V"-shaped notch with the opening facing outward; or, The anti-rotation notch is a trapezoidal notch, and the cross-sectional shape of the trapezoidal notch along the axial line perpendicular to the annular convex edge is a trapezoid. The length of the upper base of the trapezoid is smaller than the length of the lower base of the trapezoid, and the lower base is located on the side of the upper base away from the axial line of the annular convex edge.

6. The top cover assembly according to claim 2, characterized in that: The first column body comprises a first column segment and a second column segment, the first column segment is connected to the annular convex edge, and the second column segment is located at an end of the first column segment away from the annular convex edge; the diameter of the first column segment is larger than the diameter of the second column segment, and the surface of the outer periphery of the first column segment facing the first column segment forms an annular step surface; The second insulating tube is sleeved on the outer peripheral side of the first column segment, and one end of the second insulating tube away from the annular wall is provided with an overlapping edge extending toward the axial center line of the second insulating tube, and the overlapping edge overlaps the annular step surface.

7. The top cover assembly according to claim 2, characterized in that: An annular step groove is provided on the inner wall of the sealing cylinder and at one end facing the sealing ridge. Along the extending direction of the axial center line of the sealing cylinder, the depth of the annular step groove is less than the thickness of the annular sealing ridge.

8. The top cover assembly according to any one of claims 2 to 7, characterized in that: Two pole mounting holes are provided on the top cover plate; two pole mounting assemblies are provided, which are divided into a positive pole mounting assembly and a negative pole mounting assembly; and when two first anti-rotation grooves are provided in the two insulating fixings in the positive pole mounting assembly and the negative pole mounting assembly, the interval between the two first anti-rotation grooves in the insulating fixing of the positive pole mounting assembly is different from the interval between the two first anti-rotation grooves in the insulating fixing of the negative pole mounting assembly.

9. The top cover assembly according to any one of claims 1 to 7, characterized in that: An explosion-proof hole is also provided on the top cover plate, and the top cover assembly also includes a lower plastic plate and an explosion-proof valve, wherein the lower plastic plate is arranged opposite to the top cover plate and is located on the side of the top cover plate facing the inside of the battery; an opening corresponding to the pole mounting hole and a plurality of air holes corresponding to the explosion-proof hole are provided on the lower plastic plate, and the explosion-proof valve is installed in the explosion-proof hole, and an explosion-proof valve patch is attached to the explosion-proof hole on the side of the top cover plate away from the lower plastic plate, and the explosion-proof valve patch is used to cover the explosion-proof hole.

10. A battery, characterized in that: Comprising a top cover assembly as described in any one of claims 1-9.

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