CN217158377U

CN217158377U - Battery top cap subassembly and battery

Info

Publication number: CN217158377U
Application number: CN202123304470.1U
Authority: CN
Inventors: 黄达; 姜熙; 杨吉祥
Original assignee: Huawei Digital Power Technologies Co Ltd
Current assignee: Huawei Digital Power Technologies Co Ltd
Priority date: 2021-12-24
Filing date: 2021-12-24
Publication date: 2022-08-09
Anticipated expiration: 2031-12-24

Abstract

The application provides a battery top cap subassembly and battery. The battery top cover assembly comprises a top cover plate, an assembling ring, a pole and a fixing piece. The top cover plate comprises a plate body and a flange, wherein the plate body is provided with a first through hole, the flange is fixed with the plate body, the flange is arranged around the first through hole, and a first rotation stopping surface is arranged on one side, facing the first through hole, of the flange. The assembly ring is connected with the plate body on the side provided with the flange, a second through hole corresponding to the first through hole is formed in the assembly ring, at least one second rotation stopping surface is arranged on the periphery of the assembly ring, and the first rotation stopping surface is in contact with the second rotation stopping surface to limit the assembly ring to rotate relative to the top cover plate. The pole column penetrates through the first through hole and the second through hole. The fixing piece is formed on one surface of the plate body, which is provided with the flange, in an injection molding mode, and the pole, the assembling ring and the top cover plate are combined and fixed. The assembly precision of utmost point post, fitting ring and lamina tecti has been improved, the stability of battery top cap subassembly is improved moreover, the life of extension battery top cap subassembly.

Description

Battery top cap subassembly and battery

Technical Field

The application relates to the technical field of batteries, in particular to a battery top cover assembly and a battery.

Background

The post mainly exists following several kinds of forms in the market at present, pottery utmost point post, riveting utmost point post, the integrative utmost point post of moulding plastics, and not only the production technology is complicated for pottery utmost point post at present, and the cost is relatively higher. The riveting pole assembling process is complex, and a copper-aluminum friction welding pole is generally adopted, so that the risk of breakage exists. The production process of the integrated injection molding pole is simple, the reliability of the pole can be guaranteed, and the production cost can be greatly reduced.

However, the present integrative utmost point post of moulding plastics has the scarce glue of moulding plastics in, and utmost point post torsional strength is poor, in case utmost point post and apron are before the equipment of moulding plastics, and the dislocation exists in the equipment, and not only utmost point post injection structure intensity is poor, probably leads to battery apron and utmost point post intercommunication moreover, leads to the battery to take place the incident.

SUMMERY OF THE UTILITY MODEL

The application provides a battery top cap subassembly and battery, is convenient for improve the torsional strength of utmost point post among the battery top cap subassembly.

A first aspect of an embodiment of the present application provides a battery top cap assembly including a top cap plate, an assembly ring, a post, and a fixing member. The top cover plate comprises a plate body and a flange, wherein a first through hole is formed in the plate body, the flange is fixed to the plate body, the flange is arranged around the first through hole, and a first rotation stopping surface is arranged on one side, facing the first through hole, of the flange. The assembly ring with the plate body is connected in the setting the one side of flange is provided with the corresponding second through-hole of first through-hole, and the periphery has at least one second and only changes the face, first only change the face with the contact of second only change the face, in order to restrict the assembly ring is relative the lamina tecti rotates. The pole column penetrates through the first through hole and the second through hole. The fixing piece is used for combining and fixing the pole, the assembling ring and the top cover plate. The inner wall of the second through hole is provided with a third rotation stopping surface, and the pole is provided with a fourth rotation stopping surface matched with the third rotation stopping surface.

The battery top cover assembly is used for being connected with a shell to jointly encapsulate the battery core. In the battery top cover assembly, the first through hole is communicated along the first direction, and the pole column penetrates through the first through hole along the first direction. The second through hole may be located in the first through hole (into which the mounting ring extends), or the first through hole and the second through hole may be spaced apart in the first direction (into which the mounting ring does not extend). The second rotation stopping surface of the assembling ring is matched with the first rotation stopping surface of the top cover plate, so that the assembling ring is difficult to rotate relative to the top cover plate around a shaft parallel to the first direction, and the relative positions of the assembling ring and the top cover plate are favorably kept. The mounting is moulded plastics and is formed in the one side that the plate body set up the flange, and utmost point post, fitting ring and lamina tecti are connected to the mounting, because the fitting ring is difficult to rotate around the relative lamina tecti of the axle that is on a parallel with first direction, and utmost point post, fitting ring and lamina tecti relative position have been confirmed before the mounting solidification, and the mounting solidifies at static in-process, can improve the equipment precision of utmost point post, fitting ring and lamina tecti. And in the use of the battery top cover assembly, the terminal post can be difficult to rotate relative to the top cover plate through the assembling ring and the top cover plate with higher strength, so that the torsional strength of the terminal post can be improved, the stability of the battery top cover assembly is improved, and the service life of the battery top cover assembly is prolonged.

Based on the first aspect, in a possible implementation manner, the pole includes a first portion and a second portion, the first portion passes through the first through hole, the second portion is located on a surface of the plate body facing away from the flange, and the second portion has a stop surface facing the plate body.

In this possible implementation, the post of the battery top cover assembly is matched with the plate body through the second portion, so that the fixing of the relative position of the post and the top cover plate in the first direction can be realized.

Based on the first aspect, in a possible implementation manner, the battery top cover assembly further includes a sealing ring, and at least a portion of the sealing ring is disposed between the inner wall of the first through hole and the pole to fill a gap between the first through hole and the pole.

In this possible implementation, this sealing ring seals the clearance between first through-hole inner wall and the utmost point post, can reduce when the mounting is moulded plastics, moulds plastics the probability that the plastics material oozes to the plate body and keeps away from the one side of flange.

Based on the first aspect, in a possible implementation manner, the battery top cover assembly further includes a sealing ring, and the sealing ring is at least partially arranged between the inner wall of the first through hole and the assembling ring to fill a gap between the first through hole and the assembling ring.

In this possible implementation, the assembly ring part is inserted in the first through hole, and the sealing ring seals the gap between the inner wall of the first through hole and the assembly ring, so that the probability that the injection molding plastic material seeps to the surface of the plate body far away from the flange during injection molding of the fixing piece can be reduced.

In a possible implementation manner based on the first aspect, the sealing ring portion is located on a side of the plate body facing away from the flange to fill a gap between the side of the plate body facing away from the flange and the second portion.

In this possible implementation manner, the sealing ring extends from the first through hole to a surface of the plate body away from the flange, so that the sealing effect can be improved, the electrolyte close to the battery core is prevented from leaking from the battery top cover assembly, and on the other hand, the stress transmission between the second portion and the top cover plate can be buffered.

Based on the first aspect, in a possible implementation manner, the fixing member is formed by injection molding on one surface of the plate body, where the flange is arranged, and one side, away from the top cover plate, of the assembling ring is provided with an injection groove.

In this possible implementation, the injecting glue groove of this collar, on the one hand can conveniently inject the injection of plastic material, and on the other hand also can restrict mounting and collar relative rotation, makes the relative position of mounting and lamina tecti further fixed indirectly.

Based on the first aspect, in a possible implementation manner, a square groove is formed between the flange and the plate body, the assembly ring is disposed in the square groove, and the square groove has four first rotation-stopping surfaces which are parallel to each other in pairs.

In this possible implementation, the four planar inner walls of the square groove can just form four first rotation stop surfaces, and two adjacent rotation stop surfaces are 90 degrees.

Based on the first aspect, in a possible implementation manner, the pole is provided with an annular groove, and the fixing member is embedded in the annular groove.

In this possible implementation manner, the annular groove is arranged around an axis parallel to the first direction, and the fixing piece is embedded in the annular groove, so that the relative position of the fixing piece and the pole in the first direction can be limited.

Based on the first aspect, in a possible implementation manner, the assembly ring includes a first section and a second section, the first section extends into the first through hole, and the second section is located on one surface of the plate body where the flange is located.

In this possible implementation, this collar stretches into in the first through-hole, can be on the one hand in the relative position of collar and lamina tecti in the footpath restriction collar of collar, and on the other hand, when pouring into the injection plastics material, the clearance of utmost point post and first through-hole inner wall can be filled to the collar, reduces the injection plastics material and is difficult to get into the clearance of utmost point post and first through-hole inner wall to form the condition in space between utmost point post and first through-hole inner wall.

Based on the first aspect, in a possible implementation manner, the top cover plate is further provided with an explosion-proof hole, and the explosion-proof hole is used for installing an explosion-proof valve assembly.

In this possible implementation, after the explosion-proof hole is installed with the explosion-proof valve assembly, when the internal pressure of the battery is excessive, the explosion-proof valve assembly may be broken, so that the gas formed inside the battery may be discharged to the outside through the explosion-proof hole, whereby the explosion of the battery can be prevented.

Based on the first aspect, in a possible implementation manner, the battery top cap assembly further includes an insulating plate disposed on a side of the plate body away from the flange.

In this possible implementation, the insulating plate is used to isolate the top cover plate from the electric core, and to restrict the electrical connection between the top cover plate and the electric core.

A second aspect of embodiments of the present application provides a battery, including a housing, a cell, and a battery cap assembly as in any one of the implementations of the first aspect. The battery cell is arranged in the shell, the battery top cover assembly is arranged on the shell, the pole column is electrically connected with the battery cell, and the insulation board is arranged between the battery cell and the top cover plate.

The battery is connected with the battery cell through the pole, so that when the pole is connected with an external element, the electric energy of the battery cell can be led out through the pole.

Based on the second aspect, in a possible implementation manner, the battery further includes a conductive sheet, and the conductive sheet is disposed between the pole and the battery core, so that the pole and the battery core are electrically connected.

In this possible implementation, this conducting strip has increased the connection face, even the pole piece butt joint of utmost point post and electric core is not just on time, also can make utmost point post and electric core electric connection through the conducting strip.

Drawings

Fig. 1 illustrates an exploded view of a battery top cap assembly in one embodiment of the present application.

Fig. 2 shows a schematic structural diagram of a battery top cap assembly in an embodiment of the present application.

Fig. 3 shows a cross-sectional view along a-a in fig. 2.

Fig. 4 shows an enlarged view of the area IV in fig. 3.

Fig. 5 shows a schematic view of a mounting ring according to an embodiment of the present application.

Description of the main elements

Battery top cap assembly 001

Roof panel 100

Plate body 110

First surface 110a

Second surface 110b

Explosion-proof hole 111

First via 113

Flange 130

First rotation stop surface 131

Mounting ring 200

Second via 201

Third rotation stop surface 203

Ring body 210

First section 211

Second segment 213

Glue injection groove 215

Extension 230

Second rotation stop surface 231

Pole 300

First portion 310

Fourth rotation stop surface 311

Ring groove 313

Second part 330

Stop surface 331

Third portion 350

Insulating plate 400

Through-hole 401

Deformation zone 403

Fixing member 500

Seal ring 600

Conductive sheet 700

Notch 710

First direction X

The following detailed description will further illustrate the present application in conjunction with the above-described figures.

Detailed Description

The following description of the embodiments of the present application is provided by way of specific examples, and other advantages and effects of the present application will be readily apparent to those skilled in the art from the disclosure herein. While the description of the present application will be described in conjunction with the preferred embodiments, it is not intended that the features of the present application be limited to this embodiment. On the contrary, the application of the present disclosure with reference to the embodiments is intended to cover alternatives or modifications as may be extended based on the claims of the present disclosure. In the following description, numerous specific details are included to provide a thorough understanding of the present application. The present application may be practiced without these particulars. Moreover, some of the specific details have been omitted from the description in order to avoid obscuring or obscuring the focus of the present application. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

Hereinafter, the terms "first", "second", etc., if used, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified. "Upper," "lower," "left," "right," and like directional terms are defined relative to the schematically-disposed orientations of elements in the figures, and it is to be understood that the directional terms are relative terms, which are used for descriptive and clarity purposes and are intended to correspond to changes in the orientation in which the elements in the figures are disposed.

In this application, a structure generally takes on a certain shape, meaning that the structure as a whole takes on that shape from a macroscopic point of view, and may have an adjustment locally. Such as substantially square, it is understood that shapes in which one side is curved rather than straight are also included within the scope. One feature is substantially coaxial with the other feature, it being understood that the distance between the axes of the two features does not exceed 20% of the dimension of either feature perpendicular to the axes.

In the present application, the term "connected", if used, is to be understood broadly, unless otherwise explicitly stated or limited, for example "connected" may be a fixed connection, a detachable connection, or an integral part; may be directly connected or indirectly connected through an intermediate. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In the following detailed description of the embodiments, which is to be read in connection with the accompanying drawings, the drawings showing the partial structure of the device are not necessarily to scale, and are merely exemplary, which should not limit the scope of the invention.

To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

Fig. 1 illustrates an exploded view of a battery cap assembly 001 according to an embodiment of the present application. Fig. 2 shows a schematic diagram of a battery cap assembly 001 according to an embodiment of the present application.

An embodiment of the utility model provides a battery, this battery includes battery top cap subassembly 001, shell and electricity core. The battery core is arranged inside the shell, the battery top cover component 001 is connected with the electrode component of the battery core, so that the electric energy of the battery core can be conveniently led out, and when the battery core is a secondary battery core, the battery core can be charged through the battery top cover component 001.

The shell has the opening, and battery top cap subassembly 001 sets up at the opening part of shell, and battery top cap subassembly 001 is fixed with the shell again, realizes battery top cap subassembly 001 and electric core relative position's fixed, and battery top cap subassembly 001 and shell cover electric core jointly to the protection electricity core.

Referring to fig. 1 and 2, the battery top cap assembly 001 includes a top cap plate 100, a mounting ring 200, a post 300, and an insulation plate 400.

The top cover plate 100 includes a plate body 110 and a flange 130, and the plate body 110 has a substantially square shape. The plate body 110 is provided with an explosion-proof hole 111 penetrating along a first direction X, where the first direction X is a thickness direction of the plate body 110, that is, a direction from the battery cell to the outside of the battery. An explosion-proof valve assembly is arranged in the explosion-proof hole 111. When the pressure in the battery is higher, the explosion-proof valve component can be completely or partially destroyed, the pressure in the battery is released through the explosion-proof hole 111, the explosion probability of the battery is reduced, and the safety performance of the battery is improved.

The plate body 110 is provided with two first through holes 113 penetrating along the first direction X at intervals on the plate body 110, and the two first through holes 113 are respectively located at two sides of the explosion-proof hole 111. The plate body 110 has a first face 110a and a second face 110b opposite to each other in the first direction X, two flanges 130 are provided on the first face 110a, and each flange 130 is provided around one of the first through holes 113.

Optionally, the flange 130 is a substantially rectangular ring with rounded corners, and a square groove is formed between the flange 130 and the plate body 110. The side of the flange 130 facing the first through hole 113 forms a first rotation stop surface 131, and the rectangular ring has four flat surfaces, each of which forms one first rotation stop surface 131.

The top cover plate 100 is made of a metal material, and the top cover plate 100 can be welded and fixed with the housing, so that sufficient connection strength is provided between the top cover plate 100 and the housing, and a good sealing cavity is formed in the top cover plate 100 and the housing to protect the battery cell and limit electrolyte leakage of the battery cell. The insulation board 400 is located on the second surface 110b of the board body 110, the insulation board 400 is made of plastic, and the insulation board 400 isolates the top cover plate 100 from the battery cell, so that the top cover plate 100 and the battery cell can be insulated under normal use conditions.

The insulating plate 400 includes two through holes 401, and the two through holes 401 correspond to the first through holes 113. Optionally, the two through holes 401 and the two first through holes 113 are substantially circular holes, and the two through holes 401 and the two first through holes 113 are coaxially disposed. The insulating plate 400 further includes a deformation region 403 corresponding to the explosion-proof hole 111, when the pressure inside the battery is too high, the deformation region 403 is pressed and deformed, and the deformation region 403 presses the explosion-proof valve assembly on the top cover plate 100, so that the explosion-proof valve assembly is completely or partially broken. It is understood that it is also possible to provide the explosion-proof valve assembly at the insulating plate 400 and to provide only one explosion-proof hole 111 at the top cap plate 100, so that the pressure inside the battery is released by breaking the explosion-proof valve assembly at the insulating plate 400.

Fig. 3 shows a cross-sectional view along a-a in fig. 2. Fig. 4 shows an enlarged view of the area IV in fig. 3.

Referring to fig. 3 and 4, the mounting ring 200 is disposed on the first surface 110a, and the mounting ring 200 includes a ring body 210 and an extension 230. Ring body 210 is substantially annular in shape and extension 230 extends radially from the outer periphery of the annular portion. Illustratively, the extension 230 is substantially rectangular, and a surface of the extension 230 away from the ring body 210 is a plane, which forms a second rotation stop surface 231. The assembly ring 200 is disposed in the square groove, and the first rotation stop surface 131 and the second rotation stop surface 231 are in contact fit, so that the assembly ring 200 is circumferentially fixed to the top cover plate 100, and the assembly ring 200 is difficult to rotate relative to the top cover plate 100 around the axis in the first direction X. The ring body 210 of the mounting ring 200 has a second through hole 201 corresponding to the first through hole 113, and the first through hole 113 and the second through hole 201 are substantially coaxial when the first rotation stop surface 131 and the second rotation stop surface 231 are in contact fit.

Optionally, ring body 210 includes a first section 211 and a second section 213, and extension 230 is coupled to second section 213 of ring body 210. First section 211 of ring body 210 is inserted into first through hole 113. I.e., the second via 201 is partially located within the first via 113. The relative positions of the mounting ring 200 and the top cover plate 100 in the radial direction of the ring body 210 can be further fixed by partially inserting the ring body 210 into the first through hole 113.

The pole 300 is substantially a solid of revolution, and is divided into a first portion 310 and a second portion 330 in the axial direction, and the first portion 310 and the second portion 330 are both substantially cylindrical. The first portion 310 of the pole 300 enters the through-hole 401 of the insulating plate 400, passes through the first through-hole 113 and the second through-hole 201, and is exposed from the first surface 110 a. The two poles 300 respectively correspond to the two first through holes 113, that is, one pole 300 passes through each first through hole 113. The pole 300 corresponds to a pole piece in the battery, one pole 300 corresponds to a positive pole piece, one pole 300 corresponds to a negative pole piece, the second part 330 of the pole 300 is connected with the pole piece in the battery, and the first part 310 of the pole 300 is used for connecting electric equipment or charging equipment.

In a cross section perpendicular to the first direction X, the cross section of the second portion 330 is larger than that of the first through hole 113, so that the second portion 330 forms a stop surface 331 facing the second surface 110b, thereby limiting the second portion 330 from passing through the first through hole 113, and preliminarily limiting the relative positions of the pole post 300 and the top cover plate 100 in the first direction X. It is understood that the second portion 330 may not be cylindrical, and the second portion 330 may have a stop surface 331 extending out of the first portion 310 in any direction perpendicular to the first direction X. If the second portion 330 is configured in a square block shape, such that the side length of the second portion 330 in the cross section perpendicular to the first direction X is greater than the diameter of the first portion 310, that is, the second portion 330 has a stop surface 331 facing the second surface 110b, and the second portion 330 is engaged with the top cover plate 100, the relative position of the pole 300 and the top cover plate 100 in the first direction X can be limited.

Two opposite sides of the inner wall of the second through hole 201 are respectively provided with a plane, and the planes form a third rotation stopping surface 203. On opposite sides of the first portion 310 of the pole 300, a flat surface is provided, which forms a fourth rotation stop surface 311. When the pole 300 passes through the second through hole 201, the third rotation-stopping surface 203 and the fourth rotation-stopping surface 311 are in contact fit, so that the circumferential direction of the pole 300 is fixed with the assembly ring 200, and the pole 300 is difficult to rotate around the axis in the first direction X relative to the assembly ring 200.

After the post 300, the top cover plate 100 and the assembly ring 200 are assembled, the post 300 is circumferentially fixed relative to the assembly ring 200, and the assembly ring 200 is circumferentially fixed relative to the top cover plate 100, so that the post 300 is circumferentially fixed relative to the top cover plate 100.

It will be appreciated that the flange 130 may also be provided in the form of a hexagonal ring, a profiled ring or the like, the sides of which facing the first through hole 113 each have a plane or profiled surface forming the first rotation stop surface 131. The surface of the extension 230 away from the ring body 210 may also be a plane or a profile corresponding to the first rotation stopping surface 131, and the plane or the profile forms a second rotation stopping surface 231. The first and second rotation stop surfaces 131 and 231 cooperate to fix the circumferential direction of the mounting ring 200 relative to the top cover plate 100.

It is understood that the flange 130 may not be annular, such as four straight bars located at four sides of a square on the first surface 110a, and four extending portions 230 corresponding to the four straight bars respectively, and may also be configured to fix the circumferential direction of the mounting ring 200 relative to the top cover plate 100.

The battery top cap assembly 001 further includes a fixing member 500, the fixing member 500 is injection-molded on the first surface 110a of the plate body 110, and the fixing member 500 fixes the relative positions of the top cap plate 100, the mounting ring 200, and the terminal post 300 in the first direction X.

After the top cover plate 100, the assembly ring 200 and the pole 300 are assembled, injection molding compound is injected into the first surface 110a, so that the injection molding compound covers the top cover plate 100, the assembly ring 200 and the pole 300, and the fixing member 500 is formed after the injection molding compound is cured. It should be noted that the injection molding compound needs to expose the end portion of the first portion 310 of the pole 300, that is, the fixing member 500 exposes a part of the pole 300, and the exposed part is used for electrical connection with the electric device or the charging device.

Since the first section 211 of the fitting ring 200 is inserted into the first through hole 113, the first section 211 of the fitting ring 200 fills a gap between the pole 300 and the inner wall of the first through hole 113. Even if the injection molding material is not filled in the gap between the terminal 300 and the inner wall of the first through hole 113, the terminal 300 and the top cover plate 100 have better insulating performance. In this form, the structure that the injection molding compound covers the first surface 110a may be implemented by fixing the top cover plate 100, the assembly ring 200, and the post 300 through the fixing member 500, so that the top cover plate 100, the assembly ring 200, and the post 300 have high connection strength.

It is understood that the mounting ring 200 may not be inserted into the first through hole 113, and one end of the pole 300 passes through the first through hole 113 and the second through hole 201 in sequence and passes out of the mounting ring 200. The fitting ring 200 restricts the relative position of the fitting ring 200 and the top cover plate 100 in the direction perpendicular to the first direction X by fitting with the flange 130. A gap is formed between the first through hole 113 and the pole 300, and the injection molding material is filled between the first through hole 113 and the pole 300 by enhancing the flowability of the injection molding material. Or a gap between the first through hole 113 and the post 300 is maintained so that the post 300 is insulated from the top cover plate 100. Or other filling structures are used for filling the space between the first through hole 113 and the pole post 300, so that the insulating property between the pole post 300 and the top cover plate 100 is improved.

The first portion 310 of the pole post 300 is further provided with an annular groove 313, when injection molding plastic is injected, the injection molding plastic is immersed into the annular groove 313 and is cured to form the fixing member 500, and the connection strength between the fixing member 500 and the pole post 300 in the first direction X can be improved by the part of the fixing member 500 in the annular groove 313. Optionally, the section of the ring groove 313 along the radial direction of the first portion 310 is square, which can improve the connection strength between the fixing member 500 and the pole 300, and facilitate the injection molding plastic to permeate into the ring groove 313.

Fig. 5 shows a schematic view of a mounting ring 200 according to an embodiment of the present application.

Referring to fig. 5, optionally, four glue injection grooves 215 are formed on the ring body 210 of the assembly ring 200, and the glue injection grooves 215 are square grooves formed in the end portion of the second section 213 far away from the first section 211. When the injection molding compound is injected, the injection molding compound penetrates into the injection molding groove 215 and is cured to form the fixing member 500. The part of the fixing member 500 penetrating into the glue injection groove 215 forms a protrusion, and the protrusion and the glue injection groove 215 are looped, so that the relative position of the fixing member 500 and the mounting ring 200 can be limited, and the fixing member 500 is difficult to rotate relative to the mounting ring 200 around the axis in the first direction X.

It is understood that the number of the glue injection grooves 215 may be other than four, and may be set to be one, two, or three, or the like. The shape of the glue injection groove 215 may not be square, but may be other shapes such as an arc-shaped groove.

It can be understood that the assembling ring 200 is provided with a convex pillar, and when injecting the injection molding compound, the injection molding compound wraps the convex pillar and is fixed to form the fixing member 500. The fixing member 500 is formed with a groove corresponding to the protrusion, and the protrusion is engaged with the groove, so as to limit the relative position between the fixing member 500 and the mounting ring 200, so that the fixing member 500 is difficult to rotate around the axis in the first direction X relative to the mounting ring 200.

Referring back to fig. 3 and 4, the battery top cap assembly 001 further includes a sealing ring 600. A portion of the sealing ring 600 is located between the mounting ring 200 and the inner wall of the first through hole 113, and the sealing ring 600 prevents the injection molding material from permeating toward the second face 110b when the injection molding material is injected. And after the battery top cap assembly 001 is assembled with the case, the sealing ring 600 may prevent the electrolyte of the cell from leaking from the gap between the assembly ring 200 and the inner wall of the first through hole 113. The sealing ring 600 additionally has a portion between the second face 110b and the second portion 330, by which the sealing effect can be further enhanced.

Alternatively, the sealing ring 600 may be a rubber ring. The rubber itself has a certain elasticity, so that the sealing ring 600 has a good buffering performance. The force in the radial direction of the fitting ring 200 can be buffered by the portion of the seal ring 600 located between the fitting ring 200 and the inner wall of the first through hole 113. The force in the first direction X may be damped by the portion of the sealing ring 600 located between the second face 110b and the second portion 330.

As an example, the inner diameter of the penetration hole 401 of the insulating plate 400 is greater than the inner diameter of the first penetration hole 113. The pole 300 further comprises a third portion 350, the third portion 350 being located at an end of the second portion 330 remote from the first portion 310, the second portion 330 and the third portion 350 being stepped. When the pole 300 is matched with the insulating plate 400, the third part 350 is positioned in the through hole 401, the diameter of the third part 350 is smaller than the inner diameter of the through hole 401, a gap is formed between the third part 350 and the through hole 401, and the sealing ring 600 extends to the third part 350 and fills the gap between the inner walls of the through hole 401. The cross-section of the sealing ring 600 is zigzag-shaped in a cross-section parallel to the first direction X, wherein a portion between the fitting ring 200 and the inner wall of the first through-hole 113 extends in the first direction X, a portion between the second face 110b and the second portion 330 extends in the radial direction of the pole 300, and a portion between the third portion 350 and the through-hole 401 extends in the first direction X. Make sealing ring 600's sealed effect preferred, this kind of battery top cap subassembly 001 and shell cooperation can prevent effectively that the electrolyte of electric core from revealing.

Referring back to fig. 1, in order to facilitate electrical connection between the terminal post 300 and the battery cell, a conductive sheet 700 is further disposed between the terminal post 300 and the battery cell. In the cross section perpendicular to the first direction X, the sectional area of the conductive sheet 700 is larger than the sectional area of the second portion 330, when the terminal post 300 contacts the conductive sheet 700, the terminal post 300 is electrically connected to the conductive sheet 700, and the surface of the conductive sheet 700 away from the terminal post 300 can be connected to the pole piece of the battery cell. When the pole 300 and the pole piece are staggered on the projection plane perpendicular to the first direction X, the pole 300 and the pole piece can be electrically connected through the conductive sheet 700 as an intermediary.

One end of the conductive sheet 700 has a notch 710, and when the conductive sheet 700, the insulating plate 400 and the top cover plate 100 are assembled, the notch 710 of the conductive sheet 700 corresponds to the explosion-proof hole 111 of the top cover plate 100, so that the conductive sheet 700 can be prevented from blocking the explosion-proof hole 111, and the internal pressure of the battery is prevented from being difficult to release.

As an example, the two first through holes 113 correspond to the pole 300, the mounting ring 200 and the sealing ring 600, which are identical in structure, so that the pole 300, the mounting ring 200 and the sealing ring 600 have standardized sizes, and parts of the battery top cover assembly 001 can be conveniently manufactured and assembled in a standardized manner.

The battery enables the battery core to be electrically connected with external equipment through the battery top cover assembly 001. In the battery top cover component 001, the assembly ring 200 and the top cover plate 100 are in circumferential limit fit through the fit of the first rotation-stopping surface 131 and the second rotation-stopping surface 231, and the assembly ring 200 and the pole 300 are in circumferential limit fit through the fit of the third rotation-stopping surface 203 and the fourth rotation-stopping surface 311, so that after the top cover plate 100, the assembly ring 200 and the pole 300 are assembled, the three are difficult to rotate relatively. When battery top cap subassembly 001 assembles, the relative position of top cover plate 100, assembly ring 200 and utmost point post 300 is comparatively fixed, and top cover plate 100, assembly ring 200 and utmost point post 300 all are located accurate relative position before the mounting 500 solidification, have improved the equipment precision of top cover plate 100, assembly ring 200 and utmost point post 300. When battery top cap subassembly 001 uses, can restrict the relative lamina tecti 100 rotation of utmost point post 300 through collar 200 and lamina tecti 100, the joint strength between the three is further strengthened to mounting 500, has improved utmost point post 300's torsional strength, and then improves battery top cap subassembly 001's stability, prolongs battery top cap subassembly 001's life, also can maintain battery top cap subassembly 001's sealing performance in addition. The cross-section of sealing ring 600 in battery top cap subassembly 001 is the zigzag, can promote sealing performance of sealing ring 600.

The above description is only an embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions within the technical scope of the present disclosure should be covered by the disclosure of the present application.

Claims

1. A battery top cap assembly, comprising:

the top cover plate comprises a plate body and a flange, wherein the plate body is provided with a first through hole, the flange is fixed with the plate body, the flange is arranged around the first through hole, and one side, facing the first through hole, of the flange is provided with a first rotation stopping surface;

the assembly ring is connected with one surface, provided with the flange, of the plate body, is provided with a second through hole corresponding to the first through hole, and is provided with at least one second rotation stopping surface at the periphery, and the first rotation stopping surface is in contact with the second rotation stopping surface so as to limit the assembly ring to rotate relative to the top cover plate;

the pole column penetrates through the first through hole and the second through hole;

the fixing piece is used for combining and fixing the pole, the assembling ring and the top cover plate;

the inner wall of the second through hole is provided with a third rotation stopping surface, and the pole is provided with a fourth rotation stopping surface matched with the third rotation stopping surface.

2. The battery top cap assembly of claim 1, wherein the post comprises a first portion and a second portion, the first portion passing through the first through hole, the second portion being located on a side of the plate body facing away from the flange, the second portion having a stop surface facing the plate body.

3. The battery cap assembly of claim 2, further comprising a sealing ring at least partially disposed between the inner wall of the first through-hole and the post to fill a gap between the first through-hole and the post.

4. The battery top cap assembly of claim 2, further comprising a sealing ring disposed at least partially between an inner wall of the first through hole and the mounting ring to fill a gap between the first through hole and the mounting ring.

5. The battery top cap assembly of claim 3 or 4, wherein the sealing ring portion is located on a side of the plate body facing away from the flange to fill a gap between the side of the plate body facing away from the flange and the second portion.

6. The battery top cap assembly of claim 1, wherein the fixing member is injection molded on a surface of the plate body where the flange is disposed, and a glue injection groove is disposed on a side of the mounting ring away from the top cap plate.

7. The battery top cap assembly of claim 1, wherein said flange and said plate body define a square groove therebetween, said mounting ring being disposed within said square groove, said square groove having four of said first rotation stop surfaces arranged in parallel pairs.

8. The battery top cap assembly of claim 1, wherein the post is provided with an annular groove, and the securing member is inserted into the annular groove.

9. The battery top cap assembly of claim 1, wherein said mounting ring includes a first section and a second section, said first section extending into said first through hole, said second section being located on a side of said plate body where said flange is located.

10. The battery top cap assembly of claim 1, wherein the top cap plate is further provided with a blast hole for mounting a blast valve assembly.

11. The battery cap assembly of claim 1, further comprising an insulating plate disposed on a side of the plate body away from the flange.

12. A battery comprising a housing, a cell, and the battery cap assembly of any of claims 1-11;

the battery cell is arranged in the shell, the battery top cover assembly is installed on the shell, and the pole column is electrically connected with the battery cell.

13. The battery of claim 12, further comprising a conductive sheet disposed between the post and the cell such that the post and the cell are electrically connected.