CN220774543U - Battery top cap subassembly and battery - Google Patents

Abstract

The utility model discloses a battery top cover assembly and a battery. The battery top cover assembly comprises a top cover plate, polar plates and an insulating part, wherein the top cover plate comprises a first connecting plate and a first boss, the first boss protrudes from one side of the first connecting plate, which faces the inside of the battery shell, the polar plates are connected with the top cover plate through the insulating part, the polar plates comprise a second connecting plate and a second boss, the second boss protrudes from one side of the second connecting plate, which faces away from the inside of the battery shell, the first connecting plate and the second connecting plate are distributed at intervals along the thickness direction of the battery top cover assembly, the second connecting plate is close to the inside of the battery shell, the insulating part is arranged between the first boss and the second boss, one side of the insulating part, which faces away from the battery shell, is provided with a first concave position, the first connecting plate is connected in the first concave position, and one side of the insulating part, which faces the inside of the battery shell, is provided with a second concave position, and the second connecting plate is connected in the second concave position. The battery top cover component is thin in thickness, is favorable for improving the energy density of the battery, and is simple in structure.

Description

Battery top cap subassembly and battery

Technical Field

The present disclosure relates to battery technology, and particularly to a battery top cover assembly and a battery including the same.

Background

As 3C consumer electronics evolve, consumers demand higher and higher energy densities from batteries. The battery generally includes a housing having an opening at least one end, a battery cell received within the battery, and a cap assembly blocking the open end of the housing.

Chinese patent CN112787004B discloses a top cover assembly, which comprises a metal top cover, an insulating sheet and a tab contact sheet, wherein the tab contact sheet comprises a contact sheet body and a protruding connecting portion, which are connected with each other, and the contact sheet body, the insulating member and the metal top cover are sequentially laminated and connected. The top cover component with the structure is characterized in that the top cover component is in contact with the upper surface and the lower surface of the metal top cover and the contact piece body respectively and directly abuts against the upper surface and the lower surface of the insulating piece, the thickness of the top cover component is equal to the sum of the thicknesses of the metal top cover, the insulating piece and the contact piece body, so that the thickness of the top cover component is larger, and the energy density of the battery is small.

Disclosure of Invention

One object of the present utility model is to: provided is a battery top cap assembly, which is thin and is advantageous in improving the energy density of a battery.

Another object of the utility model is: provided is a battery which has a high energy density and is easy to produce.

In order to achieve the purpose, the utility model adopts the following technical scheme:

in one aspect, a battery top cover assembly is provided, the shutoff is in the open end of battery casing, battery top cover assembly includes lamina tecti, polar plate and insulating part, lamina tecti includes first connecting plate and encircles the first boss of first connecting plate periphery, first boss protrusion in first connecting plate orientation one side inside the battery casing, the middle part of first connecting plate is provided with the through-hole, the polar plate sets up in the through-hole, the polar plate passes through the insulating part with lamina tecti is connected, the polar plate includes the second connecting plate and encircles the second boss of second connecting plate periphery, the second boss protrusion in second connecting plate deviates from one side inside the battery casing, first connecting plate with the second connecting plate is followed respectively thickness direction interval distribution of battery top cover assembly, the second connecting plate is close to inside the battery casing, the insulating part sets up first boss with between the second boss, the insulating part deviates from one side of battery casing is provided with first concave position, first connecting plate is in the concave position, the second connecting plate is in the concave position of first connecting plate, the second connecting plate is in the concave position.

As a preferred technical scheme of the battery top cover assembly, a third boss is arranged on one side, away from the inside of the battery shell, of the insulating piece, one end, away from the first boss, of the first connecting plate is separated from the second boss through the third boss, a fourth boss is arranged on one side, facing the inside of the battery shell, of the insulating piece, and one end, away from the second boss, of the second connecting plate is separated from the first boss through the fourth boss.

As a preferable technical solution of the battery top cap assembly, the first connection plate, the third boss and the second boss are flush.

As a preferable technical solution of the battery top cover assembly, the second connecting plate, the fourth boss and the first boss are flush.

As a preferable technical scheme of the battery top cover assembly, the insulating member is integrally injection-molded by insulating glue.

As a preferable technical scheme of the battery top cover assembly, a plurality of first grooves are formed in one side, facing the bottom of the first concave position, of the first connecting plate, the first grooves are distributed at intervals, and the first grooves are used for accommodating the insulating glue;

and/or, a plurality of second grooves are formed in one side, facing the bottom of the second concave position, of the second connecting plate, the second grooves are distributed at intervals, and the second grooves are used for accommodating the insulating glue.

As a preferable technical scheme of the battery top cover assembly, the first boss is concavely provided with a plurality of third grooves towards one side surface of the polar plate, the third grooves are distributed at intervals, and the third grooves are used for accommodating the insulating glue;

and/or, the second boss is concavely provided with a plurality of fourth grooves towards one side surface of the top cover plate, the fourth grooves are distributed at intervals, and the fourth grooves are used for accommodating the insulating glue.

As a preferable technical scheme of the battery top cover assembly, an insulating layer is disposed on a side surface of the first boss, which faces the inside of the battery case.

As a preferable technical scheme of the battery top cover assembly, the thickness of the insulating layer is 5-100um.

On the other hand, still provide a battery, including the battery casing with hold the inside electric core of battery casing, the at least one end of battery casing has the opening, the battery casing is the metal electric conductor, the battery still includes above-mentioned battery top cap subassembly, battery top cap subassembly is used for shutoff the open end of battery casing, the periphery side of lamina tecti with the open end of battery casing supports tightly, lamina tecti passes through the battery casing electricity with one of the anodal ear and the negative pole ear electricity of electric core is connected, the polar plate orientation one side of battery casing inside with one of anodal ear and negative pole ear electricity is connected.

The beneficial effects of the utility model are as follows: the first connecting plate and the first boss are arranged on the top cover plate, the second connecting plate and the second boss are arranged on the polar plate, so that a space for accommodating an insulating part can be reserved between the first connecting plate and the first boss and between the second connecting plate and the second boss, the thickness of the battery top cover assembly is prevented from being increased due to the existence of the insulating part, the thickness of the battery top cover assembly is effectively reduced, the energy density of a battery is effectively improved, the overall structural strength of the top cover plate can be maintained by the arrangement of the first boss, and the overall structural strength of the polar plate can be maintained by the arrangement of the second boss, so that the assembled battery top cover assembly has higher structural strength. In addition, through connecting first connecting plate in the first concave position of insulating part and connecting second connecting plate in the second concave position of insulating part, avoid lamina tecti and polar plate to bulge in the surface of insulating part, this design further reduces battery top cap subassembly's thickness, makes battery top cap subassembly thinness little, light in weight to satisfy battery top cap subassembly's light, slim requirement, and, connect the connecting plate inside concave position, also can increase lamina tecti and insulating part and polar plate and insulating part's connection area, make lamina tecti, insulating part and polar plate three can combine together well. The battery top cover component with the structure has the characteristics of small thickness, high structural strength, good quality and simple structure.

Drawings

The utility model is described in further detail below with reference to the drawings and examples.

Fig. 1 is a schematic perspective view of a battery top cap assembly according to an embodiment of the present utility model.

Fig. 2 is a cross-sectional view taken along the direction A-A in fig. 1.

Fig. 3 is an enlarged view at B in fig. 2.

Fig. 4 is a cross-sectional view of a prior art battery top cap assembly.

Fig. 5 is a cross-sectional view of a battery top cap assembly according to another embodiment of the present utility model.

Fig. 6 is a cross-sectional view of another embodiment of a battery top cap assembly according to the present utility model (after removal of the insulating member).

Fig. 7 is an assembled schematic view of the battery according to the present utility model.

In the figure:

1. a top cover plate; 11. a first boss; 111. a third groove; 12. a first connection plate; 121. a first groove; 2. a polar plate; 21. a second boss; 211. a fourth groove; 22. a second connecting plate; 221. a second groove; 3. an insulating member; 31. a third boss; 32. a fourth boss; 33. a convex portion; 4. an insulating layer; 100. a battery top cap assembly; 200. a battery cell; 201. a positive electrode tab; 202. a negative electrode ear; 300. and a battery case.

Detailed Description

In order to make the technical problems solved by the present utility model, the technical solutions adopted and the technical effects achieved more clear, the technical solutions of the embodiments of the present utility model will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

As shown in fig. 7, the present utility model provides a battery including a battery case 300, a battery cell 200, and a battery top cap assembly 100, the battery cell 200 being disposed in the battery case 300, at least one end of the battery case 300 having an opening, the battery top cap assembly 100 being blocked at the open end of the battery case 300, wherein the shape of the battery cell 200 may be a cylindrical square, an arc, an oval, a crescent or a semicircle, etc., without limiting the shape of the battery cell 200.

Referring to fig. 1 to 3, the battery top cap assembly 100 includes a top cap plate 1, a plate 2, and an insulator 3, the top cap plate 1 and the plate 2 being electric conductors, in this example, the top cap plate 1 and the plate 2 being stainless steel plates, the top cap plate 1 and the plate 2 being formed by punching. In other examples, the top cover plate 1 and the polar plate 2 may be plate members made of other materials such as aluminum alloy plates or copper plates. The top cover plate 1 is electrically connected to one of the positive electrode tab 201 and the negative electrode tab 202 of the battery cell 200 through the battery case 300, and the side of the electrode plate 2 facing the inside of the battery case 300 is electrically connected to the other of the positive electrode tab 201 and the negative electrode tab 202. In this example, the top cover plate 1 is connected to the negative electrode tab 202 of the battery cell 200 through the battery case 300, and the electrode plate 2 is connected to the positive electrode tab 201 of the battery cell 200. The top cover plate 1 and the top cover plate 1 comprise a first connecting plate 12 and a first boss 11 encircling the periphery of the first connecting plate 12, the first boss 11 protrudes out of one side of the first connecting plate 12 facing the inside of the battery shell 300, a through hole is formed in the middle of the first connecting plate 12, the polar plate 2 is arranged in the through hole, and the polar plate 2 is connected with the top cover plate 1 through the insulating piece 3. The pole plate 2 includes a second connection plate 22 and a second boss 21 surrounding the outer periphery of the second connection plate 22, the second boss 21 protrudes from one side of the second connection plate 22 away from the inside of the battery case 300, the first connection plate 12 and the second connection plate 22 are respectively distributed at intervals along the thickness direction (i.e. the direction parallel to the X direction in fig. 2) of the battery top cover assembly 100, the second connection plate 22 is close to the inside of the battery case 300, and the first connection plate 12 and the second connection plate 22 are both connected with the insulating member 3. The insulator 3 is arranged between the first boss 11 and the second boss 21, a first concave position is arranged on one side, away from the battery shell 300, of the insulator 3, the first connecting plate 12 is connected in the first concave position, a second concave position is arranged on one side, facing the inside of the battery shell 300, of the insulator 3, and the second connecting plate 22 is connected in the second concave position.

The first connecting plate 12 and the first boss 11 are arranged on the top cover plate 1, the second connecting plate 22 and the second boss 21 are arranged on the polar plate 2, so that the space for accommodating the insulating piece 3 can be reserved between the first connecting plate 12 and the first boss 11 and between the second connecting plate 22 and the second boss 21, the thickness of the battery top cover assembly 100 is effectively reduced due to the fact that the insulating piece 3 is increased, the thickness of the battery top cover assembly 100 is effectively reduced, the energy density of a battery is effectively improved, the integral structural strength of the top cover plate 1 can be kept through the arrangement of the first boss 11, the integral structural strength of the polar plate 2 can be kept through the arrangement of the second boss 21, and the assembled battery top cover assembly 100 has higher structural strength. In addition, by connecting the first connecting plate 12 in the first recess of the insulating member 3 and connecting the second connecting plate 22 in the second recess of the insulating member 3, the connecting plates on the top cover plate 11 and the electrode plate 2 are accommodated by the recess on the insulating member 3, so that the thickness of the battery top cover assembly 100 is further reduced, the thickness of the battery top cover assembly 100 is reduced, the requirements of light weight and thin thickness of the battery top cover assembly 100 are met, and the connecting plates are connected in the recesses, so that the connecting area of the top cover plate 1 and the insulating member 3 and the connecting area of the electrode plate 2 and the insulating member 3 can be increased, and the top cover plate 1, the insulating member 3 and the electrode plate 2 can be well combined together. The battery top cap assembly 100 of this structure has the characteristics of small thickness, high structural strength, good quality, and simple structure.

Referring to fig. 4, fig. 4 shows a battery top cover assembly 100 in the prior art, in which a top cover plate 1, an insulating member 3 and a polar plate 2 of the battery top cover assembly 100 are directly stacked in sequence, the thickness of the top cover plate 1 is D1, the thickness of the insulating member 3 is D2, the thickness of the polar plate 2 is D3, the overall thickness d4=d1+d2+d3 of the assembled battery top cover assembly 100 in the prior art, and the overall thickness of the assembled battery top cover assembly 100 in the present utility model is the thickness of the top cover plate 1 (i.e., D1) or the thickness of the insulating member 3 (i.e., D2) or the thickness of the base plate 2 (i.e., D3), it is apparent that the thickness of the battery top cover assembly 100 of the present utility model can be well reduced by at least 50%, and compared with the prior art, the weight of the battery top cover assembly 100 of the present utility model can be reduced by 50%, the energy density of a battery can be effectively improved, and the light and thin requirements of the battery top cover assembly 100 can be satisfied.

Referring to fig. 3, a third boss 31 is provided on a side of the insulating member 3 facing away from the inside of the battery case 300, one end of the first connection plate 12 facing away from the first boss 11 is spaced from the second boss 21 by the third boss 31, a fourth boss 32 is provided on a side of the insulating member 3 facing toward the inside of the battery case 300, and one end of the second connection plate 22 facing away from the second boss 21 is spaced from the first boss 11 by the fourth boss 32. The third boss 31 prevents the first connection plate 12 from being in contact with the second boss 21 of the electrode plate 2 to be electrically conducted, and the fourth boss 32 prevents the second connection plate 22 from being in contact with the first boss 11 of the top cover plate 1 to be electrically conducted, which is advantageous in improving the safety of the battery top cover assembly 100. The arrangement of the third boss 31 and the fourth boss 32 makes the insulating part 3 be of a structure with thick two ends and thin middle, so that the overall structural strength of the insulating part 3 can be kept, good supporting and fixing effects are provided for the top cover plate 1 and the polar plate 2, the connection part between the top cover plate 1 and the polar plate 2 is prevented from being broken, and the capability of the battery top cover assembly 100 for resisting external force is improved.

Preferably, the first connecting plate 12, the third boss 31 and the second boss 21 are flush, so that a side of the battery top cover assembly 100 facing away from the inside of the battery case 300 is flat, which is advantageous for improving the overall aesthetic appearance of the battery top cover assembly 100.

Further, the second connection plate 22, the fourth boss 32 and the first boss 11 are flush, which prevents the structure on the battery top cover assembly 100 from protruding toward the inside of the battery case 300 to occupy the space inside the battery case 300.

In this embodiment, the insulating member 3 is integrally injection-molded with an insulating adhesive. Specifically, during production, the top cover plate 1 and the polar plate 2 are firstly processed and molded, then the positions of the top cover plate 1 and the polar plate 2 are fixed according to design requirements, then insulating glue is injected into a gap between the insulating glue first connecting plate 12 and the second boss 21 or a gap between the insulating glue second connecting plate 22 and the first boss 11, then the insulating glue is solidified to form an insulating piece 3, the insulating piece 3 can be well combined between the top cover plate 1 and the polar plate 2 when being molded, and the insulating piece 3 does not need to be additionally provided with an adhesive to connect the top cover plate 1 and the polar plate 2.

Preferably, referring to fig. 5 and 6, a side of the first connecting plate 12 facing the bottom of the first recess has a plurality of first grooves 121, and the plurality of first grooves 121 are spaced apart, and the first grooves 121 are used for accommodating the insulating glue. A plurality of second grooves 221 are formed in one side of the second connecting plate 22 facing the bottom of the second recess, the second grooves 221 are distributed at intervals, and the second grooves 221 are used for accommodating the insulating glue. When the insulating piece 3 is injection molded, the insulating glue in a molten state can flow into the groove of the connecting plate and solidify in the groove, the insulating glue in the groove can form the convex part 33 after solidifying, the binding force between the insulating piece 3 and the top cover plate 1 and the polar plate 2 can be improved through the combination of the convex part 33 and the connecting plate, and the insulating piece 3 is prevented from falling off from the top cover plate 1 and the polar plate 2.

Specifically, the insulating glue is made of polytetrafluoroethylene (Teflon or PTFE) or soluble polytetrafluoroethylene (PFA plastic).

In order to further improve the binding force of the insulating member 3 with the top cover plate 1 and the polar plate 2, a plurality of third grooves 111 are concavely arranged on one side surface of the first boss 11 facing the polar plate 2, the plurality of third grooves 111 are distributed at intervals, and the third grooves 111 are used for accommodating the insulating glue. The second boss 21 is concavely provided with a plurality of fourth grooves 211 towards one side surface of the top cover plate 1, the fourth grooves 211 are distributed at intervals, and the fourth grooves 211 are used for accommodating the insulating glue. When the insulating piece 3 is injection-molded, the insulating glue in a molten state can flow into the grooves on the boss and solidify in the grooves to form the convex parts 33, so that the binding force of the insulating piece 3 with the top cover plate 1 and the polar plate 2 is further improved.

Specifically, the first groove 121, the second groove 221, the third groove 111, and the fourth groove 211 may be concave arcs, or may be T-shaped grooves. When the first groove 121, the second groove 221, the third groove 111 and the fourth groove 211 are T-shaped grooves, the insulating member is cured in the grooves to form the protruding portion 33 of the T-shaped structure, and the protruding portion 33 of the T-shaped structure can be clamped in the T-shaped grooves, so that the top cover plate 1 and the polar plate 2 are combined with the insulating member 3 to an optimal degree.

In other examples, the first grooves 121 may be provided only on the first connection plate 12, or the second grooves 221 may be provided only on the second connection plate 22, or the third grooves 111 may be provided only on the first boss 11, or the fourth grooves 211 may be provided only on the second boss 21.

In this embodiment, referring to fig. 2, 3 and 7, the battery case 300 is a metal conductor (e.g. an aluminum case), the negative electrode tab 202 of the battery cell 200 is electrically connected to the battery case 300, the outer peripheral side of the top cover 1 abuts against the open end of the battery case 300, so that the top cover 1 is electrically connected to the negative electrode tab 202 of the battery cell 200 through the battery case 300, and the positive electrode tab 201 of the battery cell 200 is connected to the side of the second boss 21 facing the inside of the battery case 300, so that the electrode plate 2 is electrically connected to the positive electrode tab 201 of the battery cell 200, and the positive electrode tab 201 and the negative electrode tab 202 are respectively disposed at opposite ends of the battery cell 200. In order to prevent the positive tab 201 of the battery cell 200 from contacting the top cover plate 1 to cause a short circuit, an insulating layer 4 is disposed on a side surface of the first boss 11 facing the inside of the battery case 300, so that the safety of the battery can be improved. It can be appreciated that the positive tab 201 of the battery cell 200 is usually reserved and bent between the battery cell 200 and the top cover 1 with a certain margin, and in a vibration environment, the positive tab 201 on the battery cell 200 may contact with the top cover 1 when swinging in the battery case 300, and by providing the insulating layer 4 on a side surface of the first boss 11 facing the inside of the battery case 300, the risk of short circuit caused by contact between the positive tab 201 and the top cover 1 can be completely avoided.

Wherein the thickness of the insulating layer 4 is 5-100um. It can be understood that the thickness of the insulating layer 4 is too small, when the positive electrode lug 201 contacts the insulating layer 4, the insulating layer 4 is easy to break down and electrically conduct with the top cover plate 1, and when the thickness of the insulating layer 4 is too large, more space inside the battery case 300 is occupied, and the thickness of the insulating layer 4 is set within the range of 5-50um, so that the occupation inside the battery case 300 is reduced as much as possible on the basis that the insulating layer 4 has good insulating performance, and the energy density of the battery is improved. Specifically, the thickness of the insulating layer 4 may be any one of 5 to 100um, for example, the thickness of the insulating layer 4 may be 5um, 20um, 30um, 40um, 50um, 60um, 70um, 80um, 90um, 100um, or the like.

In this example, the insulating layer 4 is made of polytetrafluoroethylene (Teflon or PTFE), which is commonly called "plastic king", and is a polymer compound formed by polymerizing tetrafluoroethylene, and has excellent chemical stability, corrosion resistance, sealing property, high lubrication non-tackiness, electrical insulation property and good aging resistance.

In another example, the insulating layer 4 is made of soluble polytetrafluoroethylene (PFA plastic) with chemical resistance similar to that of polytetrafluoroethylene, and is suitable for manufacturing corrosion-resistant members. Of course, in other examples, the insulating layer 4 may be made of other insulating materials, and the material of the insulating layer 4 is not particularly limited.

In practice, the insulating layer 4 may be colored (e.g., black brown or light yellow, etc.), which is advantageous for distinguishing the front and rear sides of the battery top cap assembly 100, for assembling the battery top cap assembly 100 with the battery case 300, and for preventing the reverse installation of the battery top cap assembly 100.

In the battery of this embodiment, the battery top cover assembly 100 with any one of the above structures is plugged at the open end of the battery case 300, and the battery top cover assembly 100 has the characteristics of small thickness, simple structure and high structural strength, so that the battery top cover assembly 100 can improve the energy density of the battery, is beneficial to the development of the light and thin battery, and is convenient for production.

In practical implementation, the minimum height of the first boss 11 protruding from the first connecting plate 12 and the minimum height of the second boss 21 protruding from the second connecting plate 22 are 0.03mm, so that the thinnest battery top cap assembly 100 can be satisfied with a thickness of 0.06mm, while the thickness of the battery top cap assembly 100 in the prior art is greater than 0.4mm. The battery has good application in 3C consumer electronic products.

In the description herein, it should be understood that the terms "upper," "lower," "left," "right," and the like are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and to simplify the operation, rather than to indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

In the description herein, reference to the term "one embodiment," "an example," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in the foregoing embodiments, and that the embodiments described in the foregoing embodiments may be combined appropriately to form other embodiments that will be understood by those skilled in the art.

The technical principle of the present utility model is described above in connection with the specific embodiments. The description is made for the purpose of illustrating the general principles of the utility model and should not be taken in any way as limiting the scope of the utility model. Other embodiments of the utility model will be apparent to those skilled in the art from consideration of this specification without undue burden.

Claims (10)

1. The utility model provides a battery top cap subassembly, shutoff is in the open end of battery casing, its characterized in that, battery top cap subassembly includes lamina tecti, polar plate and insulating part, lamina tecti includes first connecting plate and encircles the first boss of first connecting plate periphery, first boss protrusion in first connecting plate orientation one side inside the battery casing, the middle part of first connecting plate is provided with the through-hole, the polar plate sets up in the through-hole, the polar plate passes through the insulating part with lamina tecti is connected, the polar plate includes the second connecting plate and encircles the second boss of second connecting plate periphery, the second boss protrusion in second connecting plate deviates from one side inside the battery casing, first connecting plate with the second connecting plate is followed respectively thickness direction interval distribution of battery top cap subassembly, the second connecting plate is close to inside the battery casing, the insulating part sets up first boss with between the second boss, one side that the insulating part deviates from the battery casing is provided with first concave position, first connecting plate is in the concave position is in the first connecting plate, the second connecting plate is in concave position is provided with in the concave position of second connecting plate.

2. The battery top cap assembly according to claim 1, wherein a third boss is provided on a side of the insulating member facing away from the inside of the battery case, one end of the first connecting plate facing away from the first boss is spaced apart from the second boss by the third boss, a fourth boss is provided on a side of the insulating member facing toward the inside of the battery case, and one end of the second connecting plate facing away from the second boss is spaced apart from the first boss by the fourth boss.

3. The battery top cap assembly of claim 2, wherein the first connection plate, the third boss, and the second boss are flush.

4. The battery top cap assembly of claim 2, wherein the second connecting plate, the fourth boss, and the first boss are flush.

5. The battery top cap assembly of claim 1, wherein the insulator is integrally injection molded from an insulating gel.

6. The battery top cap assembly according to claim 5, wherein the first connection plate has a plurality of first grooves on a side facing the bottom of the first recess, the plurality of first grooves being spaced apart, the first grooves being for receiving the insulating paste;

and/or, a plurality of second grooves are formed in one side, facing the bottom of the second concave position, of the second connecting plate, the second grooves are distributed at intervals, and the second grooves are used for accommodating the insulating glue.

7. The battery top cover assembly according to claim 5, wherein a plurality of third grooves are concavely formed in the first boss toward one side of the electrode plate, the plurality of third grooves are distributed at intervals, and the third grooves are used for accommodating the insulating glue;

and/or, the second boss is concavely provided with a plurality of fourth grooves towards one side surface of the top cover plate, the fourth grooves are distributed at intervals, and the fourth grooves are used for accommodating the insulating glue.

8. The battery top cap assembly according to any one of claims 1 to 7, wherein a side of the first boss facing the inside of the battery case is provided with an insulating layer.

9. The battery top cap assembly of claim 8, wherein the insulating layer has a thickness of 5-100um.

10. A battery comprising a battery case and an electric core accommodated in the battery case, wherein at least one end of the battery case is provided with an opening, characterized in that the battery case is a metal conductor, the battery further comprises the battery top cover assembly according to any one of claims 1 to 9, the battery top cover assembly is used for sealing the opening end of the battery case, the outer peripheral side of the top cover plate is abutted against the opening end of the battery case, the top cover plate is electrically connected with one of a positive electrode lug and a negative electrode lug of the electric core through the battery case, and one side of the electrode plate facing the inside of the battery case is electrically connected with the other one of the positive electrode lug and the negative electrode lug.