CN216354458U - Button battery case and button battery - Google Patents

Abstract

The utility model provides a button battery shell and a button battery with the button battery shell; button battery case is including having the inferior valve of acceping the chamber and being fixed in the epitheca of inferior valve, the epitheca includes two electrode end pieces that the interval set up, the interval encircles in the stainless steel ring in the electrode end piece outside and connect with the injection molding of electrode end piece and stainless steel ring, the injection molding is including filling the first connecting piece in the first clearance between two electrode end pieces and filling the second connecting piece in the second clearance between electrode end piece and the stainless steel ring, thereby avoid the explosion because of button battery internal pressure risees and causes, good explosion-proof performance has.

Description

Button battery case and button battery

[ technical field ] A method for producing a semiconductor device

The utility model relates to the technical field of batteries, in particular to a button battery.

[ background of the utility model ]

Button cells are also classified into two major types, chemical cells and physical cells, and the chemical cells are most commonly used. The prior art button cell casing is usually a metal casing, and the internal temperature of the button cell can rise during overcharge or over-discharge, and the pressure inside the button cell is difficult to release when reaching a limit value, which may cause a safety accident of high-temperature scald or explosion.

Therefore, it is necessary to provide a new button cell to solve the above problems.

[ Utility model ] content

The utility model aims to provide a button battery shell and a button battery with the button battery shell, which have good explosion-proof performance.

The technical scheme of the utility model is as follows:

the utility model provides a button battery case, its including have the inferior valve of acceping the chamber and be fixed in the inferior valve and with the inferior valve encloses and establishes the epitheca that forms accept the chamber, the epitheca including two electrode end pieces that the interval set up, the interval encircle in the stainless steel ring in the electrode end piece outside and connect with the electrode end piece with the injection molding of stainless steel ring, two the electrode end piece interval forms first clearance, the inward flange of stainless steel ring with the electrode end piece interval forms the second clearance, the injection molding is including filling the first connecting piece in first clearance and filling the second connecting piece in second clearance, the tip of first connecting piece along the extending direction in first clearance with the second connecting piece is connected, the outward flange of stainless steel ring is fixed in the inferior valve makes the epitheca with the inferior valve forms sealedly.

Preferably, the lower casing includes with the relative interval of epitheca sets up the diapire and certainly the lateral wall that extends is buckled to the diapire periphery, the outward flange of stainless steel ring is fixed in the lateral wall is kept away from the one end of diapire.

Preferably, the electrode terminal piece includes a first upper surface far away from the accommodating cavity and a first lower surface facing the accommodating cavity, and the first connecting member further includes a first middle portion filled in the first gap, a first upper connecting portion bent and extended from one end of the first middle portion, and a first lower connecting portion bent and extended from the other end of the first middle portion; the first upper connecting portion is attached to the first upper surface, and the first lower connecting portion is attached to the first lower surface, so that the injection molding piece and the electrode end piece are sealed.

Preferably, the stainless steel ring comprises a second upper surface far away from the containing cavity and a second lower surface facing the containing cavity, the second connecting piece comprises a second middle part filled in the second gap, a second upper connecting part bent and extended at one end of the second middle part and a second lower connecting part bent and extended at the other end of the second middle part, the number of the second upper connecting parts is two, one of the second upper connecting parts is attached to the second upper surface, the other of the second upper connecting part is attached to the first upper surface, the number of the second lower connecting parts is two, one of the second lower connecting parts is attached to the second lower surface, the other of the second lower connecting part is attached to the first lower surface, and therefore sealing is formed between the stainless steel ring and the electrode end piece.

Preferably, the second connecting piece is annular, and the first connecting piece extends along the diameter direction of the second connecting piece.

Preferably, the injection molding piece is made of one or more of PP, PE or PeeK.

The utility model also provides a button battery; the button battery shell comprises the button battery shell and a winding type winding core accommodated in the accommodating cavity; the winding type winding core extends out of an anode tab and a cathode tab, the anode tab is connected to one of the electrode end pieces, and the cathode tab is connected to the other of the electrode end pieces.

Preferably, the positive electrode tab and the negative electrode tab are respectively located on two sides of the first connecting piece.

Preferably, the included angle between the positive electrode lug and the negative electrode lug is 10-180 degrees.

The utility model has the beneficial effects that: the upper shell of the button battery shell comprises two electrode end pieces arranged at intervals, a stainless steel ring surrounding the outer sides of the electrode end pieces at intervals and an injection molding part connecting the two electrode end pieces and the stainless steel ring, wherein a gap between the battery end pieces and a gap between the stainless steel rings of the battery end pieces are filled by the injection molding part, and when the internal pressure of the battery reaches a limit value, at least one of the sealed joints of the injection molding part, the electrode end pieces and the stainless steel ring is deformed to release pressure, so that the explosion safety accident caused by the increase of the internal pressure of the button battery is avoided, and the explosion-proof performance of the button battery is effectively improved.

[ description of the drawings ]

FIG. 1 is a perspective view of a button battery case according to the present invention;

FIG. 2 is an exploded view of a button battery case according to the present invention;

FIG. 3 is a view showing the construction of the upper case of the battery case for a button in the present invention;

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 5 is an enlarged view of B in FIG. 4;

FIG. 6 is an enlarged view of C in FIG. 4;

FIG. 7 is an exploded view of a button cell of the present invention;

fig. 8 is a schematic view of a part of the button cell in the utility model.

[ detailed description ] embodiments

The utility model is further described with reference to the following figures and embodiments.

It should be noted that all directional indicators (such as upper, lower, left, right, front, back, inner, outer, top, bottom … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components in a specific posture (as shown in the figure), and if the specific posture is changed, the directional indicator is changed accordingly.

It will also be understood that when an element is referred to as being "secured to" or "disposed on" 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.

Referring to fig. 1 to 8, an embodiment of the present invention provides a button battery case 100, which includes a lower case 20 having a receiving cavity 10, and an upper case 30 fixed to the lower case 20 and enclosing the lower case 20 to form the receiving cavity 10.

Specifically, the upper case 30 includes two electrode terminal pieces 31 arranged at intervals, a stainless steel ring 32 surrounding the electrode terminal pieces 31 at intervals, and an injection molding 33 connecting the two electrode terminal pieces 31 to the stainless steel ring 32. Wherein the stainless steel ring 32 comprises an inner edge 321 close to the electrode end piece 31 and an outer edge 322 far from the electrode end piece 31; two electrode end pieces 31 are spaced apart to form a first gap 311, and the inner edge 321 of the stainless steel ring 32 is spaced apart from the electrode end pieces 31 to form a second gap 312, it being understood that since there are two electrode end pieces 31, there are also two second gaps 312.

The injection-molded part 33 includes a first connection member 331 filling the first gap 311 and a second connection member 332 filling the second gap 312, and since the first gap 311 and the second gap 312 are communicated, an end of the first connection member 331 in an extending direction of the first gap 311 is connected to the second connection member 332, and the outer edge 322 of the stainless steel ring 32 is fixed to the lower case 20, so that the upper case 30 and the lower case 20 form a sealing structure.

Specifically, the lower casing 20 includes a bottom wall 21 spaced apart from the upper casing 30 and a side wall 22 extending from the periphery of the bottom wall 21, and an outer edge 322 of the stainless steel ring 32 is fixed to an end of the side wall 22 away from the bottom wall 21. The structure of the first and second connection members 331 and 332 of the injection-molded part 33 will be described in detail below.

As shown in fig. 6, the electrode terminal piece 31 includes a first upper surface 313 away from the receiving cavity 10 and a second upper surface 314 facing the receiving cavity 10, and the first connecting member 331 includes a first middle portion 3311 filling the first gap 311, a first upper connecting portion 3312 bent and extended from one end of the first middle portion 3311, and a first lower connecting portion 3313 bent and extended from the other end of the first middle portion 3311; the first upper connecting portion 3312 is attached to the first upper surface 313, and the first lower connecting portion 3313 is attached to the first lower surface 314, so that the sealing structure between the injection molded part 33 and the electrode terminal 31 is more stable. It can be understood that, since the first gap 311 is formed by the two electrode terminal pieces 31, the number of the first upper connecting portions 3312 and the number of the first lower connecting portions 3313 are two, and the first upper surface 313 and the first lower surface 314 of each electrode terminal piece 13 are respectively attached with one of the first upper connecting portions 3312 and the first lower connecting portions 3313, so as to ensure the connection stability between the injection-molded part 33 and the electrode terminal pieces 31.

Similarly, as shown in fig. 5, the stainless steel ring 32 includes a second upper surface 323 away from the housing cavity 10 and a second lower surface 324 facing the housing cavity 10, and the second connecting member 332 includes a second middle portion 3321 filling the second gap 312, a second upper connecting portion 3322 bent and extended from one end of the second middle portion 3321, and a second lower connecting portion 3323 bent and extended from the other end of the second middle portion 3321, it can be understood that there are two second upper connecting portions 3322, one second upper connecting portion 3322 is attached to the second upper surface 323, the other second upper connecting portion 3322 is attached to the first upper surface 313, the other second lower connecting portion 3323 is also attached to the two second lower connecting portions 3323, and the one second lower connecting portion 3323 is attached to the second lower surface 324, the other second lower connecting portion 3323 is attached to the first lower surface 314, so that the stainless steel ring 32 and the electrode terminal 31 form a seal.

In the present embodiment, the upper cover 30 is circular, so the stainless steel ring 32 is circular, it can be understood that the second connecting member 332 is also circular, the electrode terminal piece 31 is circular arc-shaped, and the opposite sides of the two electrode terminal pieces 31 are straight sides, so the first connecting member 331 is long strip-shaped, and the first connecting member 331 extends along the diameter direction of the second connecting member 332.

Compared with the all-metal shell in the prior art, the connection between the injection molding part 33 in the upper cover 30, the electrode terminal piece 31 and the stainless steel ring 32 in the utility model can release pressure when the pressure inside the button cell reaches a larger value, so that the explosion caused by the pressure inside the button cell reaching a limit value is prevented.

Further, referring to fig. 7 and fig. 8, the present invention further provides a button cell 200, which includes the button cell case 100 and the winding core 300 accommodated in the accommodating cavity 10 of the button cell case 100; the winding core 300 is extended with a positive electrode tab 310 and a negative electrode tab 320, the positive electrode tab is connected to one electrode end piece 31, and the negative electrode tab 320 is connected to the other electrode end piece 32; the positive electrode tab 310 and the negative electrode tab 320 are respectively located at two sides of the first connecting member 331. Preferably, the included angle between the positive electrode tab 310 and the negative electrode tab 320 is 10 degrees to 180 degrees.

The upper shell of the button battery shell comprises two electrode end pieces arranged at intervals, a stainless steel ring surrounding the outer sides of the electrode end pieces at intervals and an injection molding part connecting the two electrode end pieces and the stainless steel ring, wherein gaps between the battery end pieces and gaps between the stainless steel rings of the battery end pieces are filled by the injection molding part, when the internal pressure of the battery reaches a limit value, at least one of sealing joints of the injection molding part, the electrode end pieces and the stainless steel ring is deformed to release pressure, so that the explosion safety accident caused by the increase of the internal pressure of the button battery is avoided, and the explosion-proof performance of the button battery is effectively improved

While the foregoing is directed to embodiments of the present invention, it will be understood by those skilled in the art that various changes may be made without departing from the spirit and scope of the utility model.

Claims (8)

1. A button battery case comprises a lower case with a containing cavity and an upper case fixed on the lower case and enclosing with the lower case to form the containing cavity, it is characterized in that the upper shell comprises two electrode end sheets arranged at intervals, a stainless steel ring surrounding the outer sides of the electrode end sheets at intervals and an injection molding part connecting the electrode end sheets and the stainless steel ring, the two electrode end sheets form a first gap at intervals, the inner edge of the stainless steel ring and the electrode end piece are spaced to form a second gap, the injection molding piece comprises a first connecting piece for filling the first gap and a second connecting piece for filling the second gap, the end part of the first connecting piece along the extending direction of the first gap is connected with the second connecting piece, the outer edge of the stainless steel ring is secured to the lower shell such that the upper shell forms a seal with the lower shell.

2. The button battery shell according to claim 1, wherein the lower shell comprises a bottom wall arranged opposite to the upper shell at a distance, and a side wall extending from the periphery of the bottom wall in a bending way, and the outer edge of the stainless steel ring is fixed at one end of the side wall far away from the bottom wall.

3. The button battery case according to claim 1, wherein the electrode terminal piece includes a first upper surface away from the receiving cavity and a first lower surface facing the receiving cavity, and the first connecting member further includes a first middle portion filling the first gap, a first upper connecting portion bent and extended from one end of the first middle portion, and a first lower connecting portion bent and extended from the other end of the first middle portion; the first upper connecting portion is attached to the first upper surface, and the first lower connecting portion is attached to the first lower surface, so that the injection molding piece and the electrode end piece are sealed.

4. The button battery case according to claim 3, wherein the stainless steel ring includes a second upper surface facing away from the receiving cavity and a second lower surface facing toward the receiving cavity, the second connecting piece comprises a second middle part filled in the second gap, a second upper connecting part bent and extended from one end of the second middle part and a second lower connecting part bent and extended from the other end of the second middle part, two second upper connecting parts are arranged, one second upper connecting part is attached to the second upper surface, the other second upper connecting part is attached to the first upper surface, the number of the second lower connecting parts is two, one second lower connecting part is attached to the second lower surface, and the other second lower connecting part is attached to the first lower surface, so that sealing is formed between the stainless steel ring and the electrode end piece.

5. The button battery case according to claim 1, wherein said second connecting member is ring-shaped, and said first connecting member extends in a diameter direction of said second connecting member.

6. A button battery is characterized by comprising the button battery shell as claimed in claim 1 and a winding type winding core accommodated in the accommodating cavity; the winding type winding core extends out of an anode tab and a cathode tab, the anode tab is connected to one of the electrode end pieces, and the cathode tab is connected to the other of the electrode end pieces.

7. The button cell according to claim 6, wherein the positive electrode tab and the negative electrode tab are respectively located on both sides of the first connecting member.

8. The button cell according to claim 7, wherein the included angle between the positive electrode tab and the negative electrode tab is 10-180 degrees.

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