CN214153022U - Battery and first shell assembly - Google Patents

Abstract

The application provides a battery and a first housing assembly. The first shell assembly comprises a first shell, a first insulating sheet and a first metal sheet, wherein the first shell is provided with a first hollowed hole and a first accommodating groove which are communicated; the first insulating sheet is positioned in the first accommodating groove, a second hollowed hole corresponding to the first hollowed hole is formed in the first insulating sheet, and the second hollowed hole is communicated with the first hollowed hole; the first metal sheet is positioned in the first accommodating groove and connected with one surface of the first insulating sheet, and the periphery of the first insulating sheet protrudes out of the periphery of the first metal sheet; one side of the first insulating sheet, which is far away from the first metal sheet, is connected to the first shell. Because first sheetmetal passes through first insulating piece fixed connection in first shells inner wall, the periphery protrusion in the periphery of first sheetmetal of first insulating piece can avoid first sheetmetal and first shells inner wall direct contact completely, has solved the situation that button cell appears the short circuit easily, has improved button cell's electrical property.

Description

Battery and first shell assembly

Technical Field

The utility model relates to a battery field especially relates to a battery and first casing subassembly.

Background

Button cell, also called button cell, including sealing washer and two steel casing subassemblies, two steel casing subassemblies are anodal steel casing subassembly and negative pole steel casing subassembly respectively, and directly registrate through the sealing washer between two steel casing subassemblies and assemble, realize button cell's sealing connection. However, the insulation effect of the steel shell assembly of the conventional button cell is poor, and particularly, the positive steel shell assembly is easy to contact and conduct electricity between the metal sheet and the inner wall of the shell, so that the button cell is easy to have short circuit, and the electrical performance of the button cell is poor.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the weak point among the prior art, providing a better battery of electrical property and first casing subassembly.

The purpose of the utility model is realized through the following technical scheme:

a first housing assembly comprising:

the first shell is provided with a first hollowed hole and a first containing groove which are communicated;

the first insulating sheet is positioned in the first accommodating groove, a second hollowed hole corresponding to the first hollowed hole is formed in the first insulating sheet, and the second hollowed hole is communicated with the first hollowed hole;

the first metal sheet is positioned in the first accommodating groove and connected with one surface of the first insulating sheet, and the periphery of the first insulating sheet protrudes out of the periphery of the first metal sheet; one surface of the first insulating sheet, which is far away from the first metal sheet, is connected to the first shell, and part of the first metal sheet is exposed in the first hollow hole through the second hollow hole.

In one embodiment, the center line of the first hollow hole and the center line of the second hollow hole are on the same straight line.

In one embodiment, the first insulating sheet is adhered to the first housing and the first metal sheet, respectively.

In one embodiment, the periphery of the first hollow-out hole surrounds the periphery of the second hollow-out hole on the projection line of the first insulating sheet.

In one embodiment, the first hollow hole and the second hollow hole are both round holes, and the diameter of the first hollow hole is larger than that of the second hollow hole.

In one embodiment, the first housing assembly further includes a first auxiliary insulation sheet, the first auxiliary insulation sheet has a first through hole, the first auxiliary insulation sheet is connected to a side of the first metal sheet away from the first insulation sheet, and the first metal sheet is partially exposed to the first through hole.

In one embodiment, the periphery of the first auxiliary insulation sheet surrounds the projection line of the first metal sheet on the first auxiliary insulation sheet.

In one embodiment, the first auxiliary insulation sheet is adhered to the first metal sheet.

In one embodiment, the first metal sheet comprises a first metal sheet main body and a first protruding portion which are connected, the first protruding portion protrudes towards one side adjacent to the first insulating sheet, the first metal sheet main body is connected with the first insulating sheet, and the first protruding portion is located in the second hollowed-out hole.

A battery comprising the first housing assembly of any of the above embodiments.

Compared with the prior art, the utility model discloses at least, following advantage has:

1. the first metal sheet is exposed out through the second hollowed-out hole and the first hollowed-out hole, so that the first metal sheet can be used for conducting the contact part of the anode or the cathode of the battery, and the surface of the first metal sheet, which is away from the first insulating sheet, can be electrically connected with the winding core through a tab;

2. because first sheetmetal passes through first insulating piece fixed connection in first shells inner wall, be equipped with first insulating piece between first sheetmetal and the first casing promptly, and the periphery protrusion of first insulating piece in the periphery of first sheetmetal, can avoid first sheetmetal and first shells inner wall direct contact completely, solved button cell and appeared the situation of short circuit easily, improved button cell's electrical property.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic diagram of a first housing assembly of a battery in one embodiment;

FIG. 2 is a cross-sectional view of the first housing assembly shown in FIG. 1;

FIG. 3 is a partial schematic view of the first housing assembly shown in FIG. 1;

FIG. 4 is a schematic structural view of a battery including the first housing assembly shown in FIG. 1;

FIG. 5 is a schematic view of the battery of FIG. 4 from another perspective;

fig. 6 is a cross-sectional view of the battery shown in fig. 4;

fig. 7 is a schematic structural view of a battery including another embodiment of the first housing assembly shown in fig. 1;

fig. 8 is a schematic structural view of a battery including yet another embodiment of the first housing assembly shown in fig. 1;

fig. 9 is a schematic structural view of a battery including still another embodiment of the first housing assembly shown in fig. 1;

fig. 10 is a cross-sectional view of the battery shown in fig. 9.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1 and 2, a first case assembly 10a of an embodiment includes a first case 100, a first insulating sheet 200, and a first metal sheet 300. The first housing 100 is provided with a first hollow hole 110 and a first receiving groove 120 which are communicated with each other. The first insulating sheet 200 is located in the first receiving groove 120, the first insulating sheet 200 is provided with a second hollow hole 210 corresponding to the first hollow hole 110, and the second hollow hole 210 is communicated with the first hollow hole 110. The first metal sheet 300 is located in the first receiving groove 120 and connected to one surface of the first insulating sheet 200, and the periphery of the first insulating sheet 200 protrudes from the periphery of the first metal sheet 300. A surface of the first insulating sheet 200 facing away from the first metal sheet 300 is connected to the first casing 100, and a portion of the first metal sheet 300 is exposed in the first hollow hole 110 through the second hollow hole 210.

In the first housing assembly, since the first insulating sheet 200 is fixed to one surface of the first metal sheet 300, and the surface of the first insulating sheet 200 away from the first metal sheet 300 is fixed to the inner wall of the first housing 100, the first metal sheet 300 is fixedly connected to the inner wall of the first housing 100 through the first insulating sheet 200, so as to prevent the first metal sheet 300 from directly contacting with the first housing 100, and since the second hollow hole 210 is correspondingly communicated with the first hollow hole 110, the first metal sheet 300 is exposed to the outside through the second hollow hole 210 and the first hollow hole 110, so as to ensure that the first metal sheet 300 can be used for conducting electricity at a positive electrode or negative electrode contact portion of the battery 10, and the surface of the first metal sheet 300 away from the first insulating sheet 200 can be electrically connected to the winding core through a tab; because the first metal sheet 300 is fixedly connected to the inner wall of the first casing 100 through the first insulation sheet 200, that is, the first insulation sheet 200 is arranged between the first metal sheet 300 and the first casing 100, and the periphery of the first insulation sheet 200 protrudes out of the periphery of the first metal sheet 300, the first metal sheet 300 can be completely prevented from directly contacting the inner wall of the first casing 100, the problem that the button cell 10 is easily short-circuited is solved, and the electrical performance of the button cell 10 is improved.

As shown in fig. 2, further, the center line of the first hollow hole 110 and the center line of the second hollow hole 210 are on the same straight line, so that the first hollow hole 110 and the second hollow hole 210 are disposed opposite to each other, and meanwhile, the situation that the first metal sheet 300 exposed in the second hollow hole 210 is easily touched to the periphery of the first hollow hole 110 due to deformation can be better avoided, and the reliability of the button cell 10 is improved.

As shown in fig. 2, in order to securely connect the first metal sheet 300 to the first housing 100 through the first metal sheet 300, the first insulating sheet 200 is further adhered to the first housing 100 and the first metal sheet 300, respectively, so that the first metal sheet 300 is securely connected to the first housing 100 through the first metal sheet 300.

As shown in fig. 2, further, the periphery of the first hollow hole 110 surrounds the periphery of the second hollow hole 210 on the projection line of the first insulating sheet 200, so that the first hollow hole 110 completely exposes the second hollow hole 210, and simultaneously, a portion of the first metal sheet 300 is exposed through the first hollow hole 110 and the second hollow hole 210, thereby preventing the first metal sheet 300 exposed in the second hollow hole 210 from touching the first hollow hole 110, and the outer periphery of the first insulating sheet 200 completely protrudes out of the outer periphery of the first metal sheet 300, so that the first metal sheet 300 is connected to the first casing 100 through the first insulating sheet 200 without touching the first casing 100, thereby further improving the electrical performance of the battery 10.

As shown in fig. 2, further, the first hollow hole 110 and the second hollow hole 210 are both circular holes, and the diameter of the first hollow hole 110 is greater than the diameter of the second hollow hole 210, so that the shapes of the first hollow hole 110 and the second hollow hole 210 are relatively simple, meanwhile, the first hollow hole 110 completely exposes the second hollow hole 210, and simultaneously, a portion of the first metal sheet 300 is exposed through the first hollow hole 110 and the second hollow hole 210, thereby preventing the first metal sheet 300 exposed through the second hollow hole 210 from touching the first hollow hole 110, and additionally, the outer periphery of the first insulating sheet 200 completely protrudes out of the outer periphery of the first metal sheet 300, so that the first metal sheet 300 is connected to the first casing 100 through the first insulating sheet 200 and is not in contact with the first casing 100, thereby further improving the electrical performance of the battery 10. It is understood that, in other embodiments, neither the first hollow hole 110 nor the second hollow hole 210 is limited to a circular hole, and both the first hollow hole 110 and the second hollow hole 210 may also be rectangular holes, elliptical holes, or other shaped holes.

As shown in fig. 2, further, the first casing assembly 10a further includes a first auxiliary insulation sheet 800, a first through hole 810 is formed in the first auxiliary insulation sheet 800, the first auxiliary insulation sheet 800 is connected to one side of the first metal sheet 300 departing from the first insulation sheet 200, and the first metal sheet 300 is partially exposed in the first through hole 810, so that the first metal sheet 300 is electrically connected to the tab of the winding core assembly in the first casing assembly 10a through the first through hole 810, and further the first metal sheet 300 is better electrically connected to the tab of the winding core assembly. Further, the circumference of the first auxiliary insulation sheet 800 is at least flush with the circumference of the first metal sheet 300, so that the first auxiliary insulation sheet 800 can insulate the side of the first metal sheet 300 away from the first insulation sheet 200.

As shown in fig. 2, it can be understood that, in order to better insulate the first auxiliary insulation sheet 800 from the first metal sheet 300, the first auxiliary insulation sheet 800 surrounds the projection line of the first metal sheet 300 on the first auxiliary insulation sheet 800, so that the first metal sheet 300 is sandwiched between the first auxiliary insulation sheet 800 and the first insulation sheet 200, even if the first metal sheet 300 is completely disposed between the first auxiliary insulation sheet 800 and the first insulation sheet 200, the first auxiliary insulation sheet 800 can better insulate the first metal sheet 300 from the first insulation sheet 200.

As shown in fig. 2, in order to quickly and effectively connect and fix the first auxiliary insulation sheet 800 and the first metal piece 300, the first auxiliary insulation sheet 800 is further bonded to the first metal piece 300, so that the first auxiliary insulation sheet 800 and the first metal piece 300 can be quickly and effectively connected and fixed.

As shown in fig. 2 and 3, further, the first metal sheet 300 includes a first metal sheet main body 310 and a first protruding portion 320, which are connected, the first protruding portion 320 protrudes toward a side adjacent to the first insulating sheet 200, the first metal sheet main body 310 is connected to the first insulating sheet 200, and the first protruding portion 320 is located in the second hollow hole 210, so that the first metal sheet 300 is better connected to the first insulating sheet 200 in a positioning manner.

As shown in fig. 2, in order to firmly connect the first metal sheet main body 310 and the first protruding portion 320 and to make the structure of the first metal sheet 300 more compact, further, the first metal sheet main body 310 and the first protruding portion 320 are integrally formed, so that the first metal sheet main body 310 and the first protruding portion 320 are firmly connected and the structure of the first metal sheet 300 is made more compact. In the present embodiment, the first metal sheet main body 310 is integrally press-formed with the first protruding portion 320.

As shown in fig. 4 to 6, the present application also provides a battery 10 including the first case assembly 10a according to any one of the above embodiments. It is understood that the first casing assembly 10a according to any of the above embodiments may be one of a positive casing assembly or a negative casing assembly. In this embodiment, the first case assembly 10a according to any of the above embodiments is a positive case assembly, and the first metal sheet 300 is used for a positive contact portion of the battery 10.

As shown in fig. 6, the battery 10 further includes a second casing assembly 10b, and the second casing assembly 10b includes a second casing 400, and the second casing 400 is fixedly connected to the first casing 100 by heat sealing or heat sealing, so that the second casing 400 is tightly connected to the first casing 100. Since the first insulating sheet 200 is fixed to one side of the first metal sheet 300, and the side of the first insulating sheet 200 departing from the first metal sheet 300 is fixed to the inner wall of the first casing 100, the first metal sheet 300 is fixedly connected to the inner wall of the first casing 100 through the first insulating sheet 200, thereby preventing the first metal sheet 300 from being in direct electrical contact with the first casing 100, and since the second hollow holes 210 are correspondingly communicated with the first hollow holes 110, the first metal sheet 300 is exposed through the second hollow holes 210 and the first hollow holes 110. Because the first casing 100 and the second casing 400 are packaged and connected through one of the heat sealing operation and the heat sealing operation, the problem that liquid leakage is easily caused when the first casing 100 and the second casing 400 are connected through mechanical sealing by sealant is avoided, the first casing 100 and the second casing 400 are reliably connected, meanwhile, the first casing 100 and the second casing 400 are fixedly connected through the heat sealing operation or the heat sealing operation, the requirement on the precision of the fit clearance between the first casing 100 and the second casing 400 is avoided to be higher, and the fault tolerance of the button cell 10 is greatly improved. In the present embodiment, the second case assembly 10b is a negative case assembly.

As shown in fig. 4 and 6, in one embodiment, the second casing 400 is fixedly connected to the first casing 100 by heat sealing, so that the second casing 400 and the first casing 100 jointly enclose a battery cavity 10c, and the second casing 400 is tightly connected to the first casing 100. In this embodiment, the second case 400 is coupled to the first case 100 through a heat-sealing process. Further, the first case 100 and the second case 400 may be made of aluminum-plastic films, so that the first case 100 and the second case 400 have better bending and stamping properties, and the battery 10 has a lighter structure.

As shown in fig. 6, in one embodiment, the second housing assembly 10b further comprises an insulating ring 500. The second housing 400 has a second receiving groove 410, the first metal sheet 300 faces the second receiving groove 410, the insulating ring 500 is crimped to the second housing 400, and the insulating ring 500 partially wraps the periphery of the second receiving groove 410, the first housing 100 is sleeved to the second housing 400, the second housing 400 is fixedly connected to the first housing 100 through the insulating ring 500 in a heat sealing manner, so that the second housing 400 is tightly connected to the first housing 100, and the insulating ring 500 partially wraps the periphery of the second receiving groove 410, thereby preventing the first metal sheet 300 from abutting against the periphery of the second receiving groove 410 of the second housing 400 after the first housing 100 is fixedly connected to the second housing 400. In the present embodiment, the receiving cavity 410 communicates with the first receiving groove 120 through the second receiving groove 410.

As shown in fig. 7, in one embodiment, one surface of the first insulating sheet 200 adjacent to the first metal sheet 300 is further abutted against a portion of the insulating ring 500 corresponding to the receiving groove periphery of the second receiving groove 410, so that the portion of the receiving groove periphery of the second receiving groove 410 is supported and abutted against the first insulating sheet 200, and the first insulating sheet 200 is pressed between the receiving groove periphery of the second receiving groove 410 and the inner wall of the first housing 100, thereby preventing the first housing 100 from being wrinkled and achieving a better insulating and sealing effect. The first insulating sheet 200 is compressed between the peripheries of the first housing 100 and the second receiving groove 410 to form a first sealing structure, and the first housing 100 and the second housing 400 are thermally sealed by the insulating ring 500 to form a second sealing structure, so that the battery 10 has better sealing performance, and the problem of leakage of the battery 10 is better avoided.

As shown in fig. 7, in one embodiment, the first metal sheet 300 is located in the second receiving groove 410, and the insulating ring 500 is disposed around the first metal sheet 300. In this embodiment, the first metal sheet 300 is disposed adjacent to the periphery of the second receiving groove 410 of the second housing 400, so that the first metal sheet 300 and the second housing 400 are separated by the insulating ring 500, thereby achieving a better insulating effect, reducing the volume of the assembled battery 10, and further making the structure of the battery 10 more compact.

As shown in fig. 8, in one embodiment, the periphery of the first metal sheet 300 abuts against the insulating ring 500, so that the first housing 100 and the second housing 400 are assembled more tightly, and the external vibration of the first metal sheet 300 is reduced, thereby achieving a better buffering effect, and further enabling the first metal sheet 300 to be reliably connected to the first housing 100.

As shown in fig. 6, in one embodiment, the insulating ring 500 partially protrudes from between the second casing 400 and the first casing 100, such that the insulating ring 500 is partially exposed outside the first casing 100, and the first casing 100 is thermally connected to the second casing 400 through the insulating ring 500, and the inner periphery of the first casing 100 is also separated from the second casing 400 through the insulating ring 500, such that the first casing 100 and the second casing 400 are better insulated from each other.

As shown in fig. 9, it is understood that in other embodiments, the second housing 400 is not limited to being fixedly connected to the first housing 100 by heat sealing. In one embodiment, the second casing 400 is fixedly connected to the first casing 100 by heat sealing, so that the second casing 400 and the first casing 100 jointly enclose the battery cavity 10c, and the second casing 400 is tightly connected to the first casing 100, thereby preventing the leakage of the battery 10. In this embodiment, the second casing 400 is attached to the first casing 100 through a heat-sealing process such that the second casing 400 is tightly attached to the first casing 100. Specifically, the first case 100 and the second case 400 may be made of aluminum-plastic films, so that the first case 100 and the second case 400 have better bending and stamping properties, and the battery 10 has a lighter structure.

As shown in fig. 9 and 10, in one embodiment, the second housing assembly 10b further includes a second insulation sheet 700 and a second metal sheet 600. The second housing 400 is provided with a second receiving groove 410 and a third hollow hole 420 which are communicated with each other. The second insulating sheet 700 is connected to one surface of the second metal sheet 600, and the second insulating sheet 700 is provided with a fourth hollow hole 710 communicated with the third hollow hole 420. The second metal sheet 600 is partially exposed in the third hollow hole 420, and the periphery of the second insulation sheet 700 protrudes from the periphery of the second metal sheet 600, so that the second metal sheet 600 is connected to the second casing 400 through the second insulation sheet 700, thereby preventing the second metal sheet 600 from being in direct electrical contact with the second casing 400, and reliably insulating the second metal sheet 600 from the second casing 400. Since the fourth hollow hole 710 is correspondingly communicated with the third hollow hole 420, the second metal sheet 600 is exposed through the fourth hollow hole 710 and the third hollow hole 420. In the present embodiment, the first metal sheet 300 and the second metal sheet 600 are disposed opposite to each other, and the first metal sheet 300 is fixed to the first casing 100 through the first insulation sheet 200, and the second metal sheet 600 is fixed to the second casing 400 through the second insulation sheet 700.

Further, the battery 10 further includes a winding core, a positive tab and a negative tab, wherein the positive tab and the negative tab are respectively protruded at two ends of the winding core. Roll up core, anodal ear and negative pole ear and be the battery 10 intracavity, wherein first sheetmetal 300 welds in the anodal ear and keeps away from the one end of rolling up the core, and second sheetmetal 600 welds in the negative pole ear and keeps away from the one end of rolling up the core, makes first sheetmetal 300 and anodal ear electricity be connected, and second sheetmetal 600 and negative pole ear electricity are connected. The first metal sheet 300 is exposed to the outside through the first and second hollow holes 110 and 210 to form a positive contact portion, and the second metal sheet 600 is exposed to the outside through the third and fourth hollow holes 420 and 710 to form a negative contact portion.

Further, the activity of the metal material of which the second metal sheet 600 is made is less than that of the metal material of which the first metal sheet 300 is made, so that the second metal sheet 600 is connected to the positive tab, and the first metal sheet 300 is connected to the negative tab.

As shown in fig. 10, in order to avoid the situation of short circuit caused by the interference between the peripheral walls of the second insulating sheet 700 and the third hollow-out hole 420, in one embodiment, the periphery of the third hollow-out hole 420 surrounds the periphery of the fourth hollow-out hole 710 on the projection line of the second insulating sheet 700, so that the periphery of the fourth hollow-out hole 710 of the second insulating sheet 700 is protruded and exposed out of the third hollow-out hole 420, thereby avoiding the situation of short circuit caused by the interference between the peripheral walls of the second insulating sheet 700 and the third hollow-out hole 420, and further reliably insulating the second metal sheet 600 from the second casing 400 through the second insulating sheet 700.

As shown in fig. 10, the second casing assembly 10b further includes a second auxiliary insulation sheet 900, the second auxiliary insulation sheet 900 is connected to a surface of the second metal sheet 600 that is away from the second insulation sheet 700, a peripheral edge of the second auxiliary insulation sheet 900 protrudes from a peripheral edge of the second metal sheet 600, so that the second metal sheet 600 is located between the second insulation sheet 700 and the second auxiliary insulation sheet 900, and the second metal sheet 600 can be reliably insulated from the second casing 400 and the second casing 400. In this embodiment, the second auxiliary insulation sheet 900 is provided with a second through hole 910, and a portion of the second metal sheet 600 is exposed to the second through hole 910, so that the negative tab is welded to the second metal sheet 600 through the second through hole 910. Further, the periphery of the second auxiliary insulation sheet 900 is at least flush with the periphery of the second metal sheet 600, so that the second auxiliary insulation sheet 900 can insulate the side of the second metal sheet 600 departing from the second insulation sheet 700.

As shown in fig. 10, it can be understood that, in order to better insulate the second auxiliary insulation sheet 900 from the second insulation sheet 700 of the second metal sheet 600, the second auxiliary insulation sheet 900 is surrounded by the periphery of the second auxiliary insulation sheet 900 on the projection line of the second auxiliary insulation sheet 900, so that the second metal sheet 600 is clamped between the second auxiliary insulation sheet 900 and the second insulation sheet 700, even if the second metal sheet 600 is completely arranged between the second auxiliary insulation sheet 900 and the second insulation sheet 700, the second auxiliary insulation sheet 900 can better insulate the second metal sheet 600 from the second insulation sheet 700.

As shown in fig. 10, in order to quickly and effectively connect and fix the second auxiliary insulation sheet 900 to the second metal piece 600, the second auxiliary insulation sheet 900 is further bonded to the second metal piece 600, so that the second auxiliary insulation sheet 900 and the second metal piece 600 can be quickly and effectively connected and fixed.

As shown in fig. 10, further, the second metal sheet 600 includes a second metal sheet main body 610 and a second protrusion 620 connected to each other, the second protrusion 620 protrudes toward a side adjacent to the second insulation sheet 700, the second metal sheet main body 610 is connected to the second insulation sheet 700, and the second protrusion 620 is located in the fourth hollow hole, so that the second metal sheet 600 is better connected to the second insulation sheet 700.

As shown in fig. 10, in order to firmly couple the second metal sheet main body 610 to the second protrusion 620 and to make the structure of the second metal sheet 600 more compact, the second metal sheet main body 610 and the second protrusion 620 are integrally formed, so that the second metal sheet main body 610 and the second protrusion 620 are firmly coupled and the structure of the second metal sheet 600 is made more compact. In the present embodiment, the second metal sheet main body 610 is press-formed integrally with the second protrusion 620.

Compared with the prior art, the utility model discloses at least, following advantage has:

1. since the first insulating sheet 200 is fixed to one side of the first metal sheet 300, and one side of the first insulating sheet 200 facing away from the first metal sheet 300 is fixed to the inner wall of the first casing 100, the first metal sheet 300 is fixedly connected to the inner wall of the first casing 100 through the first insulating sheet 200, so as to prevent the first metal sheet 300 from directly contacting with the first casing 100, and since the second hollow hole 210 is correspondingly communicated with the first hollow hole 110, the first metal sheet 300 is exposed to the outside through the second hollow hole 210 and the first hollow hole 110, so as to ensure that the first metal sheet 300 can be used for conducting electricity at a contact part of a positive electrode or a negative electrode of the battery 10, and one side of the first metal sheet 300 facing away from the first insulating sheet 200 can be electrically connected with the winding core through a tab;

2. because the first metal sheet 300 is fixedly connected to the inner wall of the first casing 100 through the first insulation sheet 200, that is, the first insulation sheet 200 is arranged between the first metal sheet 300 and the first casing 100, and the periphery of the first insulation sheet 200 protrudes out of the periphery of the first metal sheet 300, the first metal sheet 300 can be completely prevented from directly contacting the inner wall of the first casing 100, the problem that the button cell 10 is easily short-circuited is solved, and the electrical performance of the button cell 10 is improved.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. A first housing assembly, comprising:

the first shell is provided with a first hollowed hole and a first containing groove which are communicated;

the first insulating sheet is positioned in the first accommodating groove, a second hollowed hole corresponding to the first hollowed hole is formed in the first insulating sheet, and the second hollowed hole is communicated with the first hollowed hole;

the first metal sheet is positioned in the first accommodating groove and connected with one surface of the first insulating sheet, and the periphery of the first insulating sheet protrudes out of the periphery of the first metal sheet; one surface of the first insulating sheet, which is far away from the first metal sheet, is connected to the first shell, and part of the first metal sheet is exposed in the first hollow hole through the second hollow hole.

2. The first housing assembly of claim 1, wherein a centerline of the first hollowed-out aperture is collinear with a centerline of the second hollowed-out aperture.

3. The first housing assembly of claim 1 wherein said first insulating sheet is bonded to said first housing and said first metal sheet, respectively.

4. The first housing assembly of any one of claims 1 to 3, wherein a periphery of the first hollowed-out hole surrounds a periphery of the second hollowed-out hole at a projection line of the first insulating sheet.

5. The first housing assembly of claim 4, wherein the first and second apertures are circular apertures, and wherein a diameter of the first aperture is greater than a diameter of the second aperture.

6. The first housing assembly of any one of claims 1 to 3, further comprising a first auxiliary insulation sheet, wherein the first auxiliary insulation sheet has a first through hole, the first auxiliary insulation sheet is connected to a side of the first metal sheet away from the first insulation sheet, and the first metal sheet is partially exposed to the first through hole.

7. The first housing assembly of claim 6, wherein a periphery of the first auxiliary insulating sheet surrounds a projection line of the first metal sheet on the first auxiliary insulating sheet.

8. The first housing assembly of claim 6, wherein the first auxiliary insulating sheet is bonded to the first metal sheet.

9. The first housing component of any one of claims 1 to 3, wherein the first metal sheet comprises a first metal sheet main body and a first boss portion connected, the first boss portion protruding toward a side adjacent to the first insulating sheet, the first metal sheet main body being connected with the first insulating sheet, the first boss portion being located in the second cutout.

10. A battery comprising the first housing assembly of any one of claims 1 to 9.

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