CN216928728U - Shell structure for button cell and button cell - Google Patents

Abstract

The utility model discloses a shell structure for a button battery and the button battery, wherein the shell structure for the button battery comprises an upper cover, a bottom shell and an insulating ring, the bottom shell is provided with a bottom wall, a side wall and a butting wall, the side wall is annularly arranged on the bottom wall, the butting wall extends from the other end of the side wall to one side far away from the bottom wall, the inner wall surface of the butting wall is matched with the end surface of the other end of the side wall to form a butting groove, and a notch of the butting groove is arranged towards the inside of the butting wall; the insulating ring is arranged in the abutting groove, the outer ring of the insulating ring is in abutting fit with both the abutting wall and the side wall, and the outer edge of the upper cover is in abutting fit with the inner ring of the insulating ring so as to enable the upper cover and the bottom shell to be in insulating fit; the button cell comprises the shell structure for the button cell. Compare the tradition and both need set up the annular rolling slot and carry out the structure of buckling, not only reduced the annular rolling slot to the space occupancy of drain pan on direction of height, also reduced the bending deformation variable of drain pan moreover for the intensity performance of structure obtains guaranteeing.

Description

Shell structure for button cell and button cell

Technical Field

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

Background

Button cells, also commonly referred to as Button cells, refer to a type of battery that resembles a Button in shape. Button cells are typically relatively larger in diameter and relatively thinner in thickness. The button cell comprises a shell and a cell component arranged in the shell, the shell comprises a bottom shell, an upper cover and a sealing ring, the upper cover is covered on the bottom shell to form a cell cavity, and the sealing ring enables the bottom shell to be insulated from the upper cover.

In order to realize the insulating matching between the bottom shell and the upper cover by the sealing ring, as shown in fig. 8, on one hand, an annular rolling groove needs to be formed by bending towards the inner side of the bottom shell at the periphery of the bottom shell, and on the other hand, the edge position of the bottom shell needs to be bent towards the inner side of the bottom shell so as to form a groove body structure for matching the insulating ring by matching the contour of the annular rolling groove. However, this structure not only makes the space utilization of the bottom case in the height direction worse, but also makes the deformation of the bottom case larger, and has a larger influence on the structural performance of the bottom case.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide a casing structure for a button cell and a button cell; the shell structure for the button battery enables the space utilization rate of the bottom shell in the height direction to be higher, the deformation of the bottom shell is smaller, the structural performance of the bottom shell is guaranteed, and the shell structure is more compact; the button cell comprises the shell structure for the button cell, so that the structure of the button cell is more compact.

The technical scheme is as follows:

one embodiment provides a case structure for a button battery, including:

an upper cover;

the bottom shell is provided with a bottom wall, a side wall and a butting wall, the side wall is annularly arranged on the bottom wall, the butting wall extends from the other end of the side wall to one side far away from the bottom wall, the inner wall surface of the butting wall is matched with the end surface of the other end of the side wall to form a butting groove, and a notch of the butting groove is arranged towards the inside of the butting wall;

the insulating ring is arranged in the abutting joint groove, the outer ring of the insulating ring is in abutting joint with the abutting joint wall and the side wall in abutting joint matching, and the outer edge of the upper cover is in abutting joint with the inner ring of the insulating ring in matching, so that the upper cover is in insulating matching with the bottom shell.

The aforesaid a shell structure for button cell, the internal face of butt joint wall forms the butt joint groove with the terminal surface cooperation of the other end of lateral wall, the outer loop of insulating circle passes through butt joint groove and drain pan insulating cooperation, and the inner ring insulating cooperation of upper cover and insulating circle, thereby realize the insulating cooperation of upper cover and drain pan, compare the tradition and need set up the annular rolling slot structure of buckling again, the space occupancy of annular rolling slot to the drain pan on the direction of height has not only been reduced, and the bending deformation variable of drain pan has also been reduced, make the intensity performance of structure obtain guaranteeing.

The technical solution is further explained below:

in one embodiment, the abutting wall is provided with an extending portion and a bending portion which are both annularly arranged, the extending portion is located between the side wall and the bending portion and extends towards one side far away from the bottom wall, the bending portion extends towards the inside of the ring relative to the extending portion, and the thickness of the extending portion is smaller than that of the side wall, so that the end face of the other end of the side wall, the inner wall face of the extending portion and the inner wall face of the bending portion are matched to form the abutting groove.

In one embodiment, an inner edge projection profile of the other end of the side wall when projected in the depth direction of the bottom case is located inside an outer edge projection profile of the bent portion;

the insulating ring is provided with a first edge, the first edge is positioned on one side, far away from the bottom wall, of the upper cover, and a preset interval is formed between the first edge and the outer edge of the bent part.

In one embodiment, the side wall is in a circular ring shape, the bending part and the extending part are both in a circular ring shape, and the upper cover is in a circular plate shape.

In one embodiment, the outer diameter of the side wall is equal to the outer diameter of the extension part, and the inner diameter of the side wall is larger than the inner diameter of the extension part, so that a stepped groove is formed between the end face of the other end of the side wall and the inner wall surface of the extension part.

In one embodiment, the upper cover has a cover body, a connection ring and an abutment ring, the connection ring is circumferentially provided on the outer periphery of the cover body and is used for connecting the cover body and the abutment ring; the connecting ring is bent towards one side of the bottom shell, so that the abutting ring is located on one side, facing the bottom shell, of the cover body, and the outer edge of the abutting ring is in abutting fit with the inner ring of the insulating ring.

In one embodiment, the bottom wall, the side wall and the abutting wall are provided in an integral structure; or/and the cover body, the connecting ring and the abutting ring are arranged in an integral structure.

Another embodiment provides a button cell, including:

an electrical core assembly;

according to the shell structure for the button battery in any technical scheme, the bottom shell and the upper cover are in insulation fit to form the battery cell cavity, and the battery cell assembly is arranged in the battery cell cavity.

Above-mentioned button cell adopts aforementioned a shell structure for button cell, compares the tradition and has both set up the annular rolling slot and carry out the structure of the drain pan of buckling, has not only reduced the annular rolling slot to the space occupancy of drain pan on the direction of height, has also reduced the bending deformation volume of drain pan moreover for the strength properties of structure obtains guaranteeing, and makes button cell's structure compacter.

The technical solution is further explained below:

in one embodiment, the electrode assembly includes a first electrode piece, a second electrode piece and a diaphragm, the first electrode piece and the second electrode piece are wound and arranged to form a winding core structure, the diaphragm is arranged between the first electrode piece and the second electrode piece to enable the first electrode piece and the second electrode piece to be insulated, the first electrode piece is electrically connected with the upper cover, and the second electrode piece is electrically connected with the bottom case.

In one embodiment, the first pole piece is provided with at least one first pole tab, and the first pole tab is electrically connected with the upper cover; the second pole piece is provided with at least one second pole lug, and the second pole lug is electrically connected with the bottom shell.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Furthermore, the drawings are not drawn to a 1:1 scale, and the relative sizes of the various elements in the drawings are drawn only by way of example, and not necessarily to true scale.

Fig. 1 is a schematic view of the overall structure of a button cell in the embodiment of the utility model;

FIG. 2 is a sectional view of the button cell in the embodiment of FIG. 1;

FIG. 3 is an assembled cross-sectional view of the upper cover, insulating collar and abutment wall of the embodiment of FIG. 1;

FIG. 4 is a block diagram of the abutment wall and the sidewall cooperating to form an abutment channel in the embodiment of FIG. 1;

FIG. 5 is a sectional view showing the entire structure of the upper cap in the embodiment of FIG. 1;

FIG. 6 is a schematic view of the overall structure of the bottom case in the embodiment of FIG. 1;

FIG. 7 is a sectional view showing the entire structure of the bottom case in the embodiment of FIG. 6;

fig. 8 is a sectional view illustrating a structure of a conventional bottom chassis.

Reference is made to the accompanying drawings in which:

100. an upper cover; 110. a cover body; 120. a connecting ring; 130. a butting ring; 200. a bottom case; 210. a bottom wall; 220. a side wall; 230. an abutment wall; 231. an extension portion; 232. a bending section; 240. a butt joint groove; 300. an insulating ring; 301. a first edge; 400. an electrical core assembly; 501. an annular rolling groove; 502. a groove structure.

Detailed Description

Embodiments of the present invention are described in detail below with reference to the accompanying drawings:

in order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

As shown in fig. 8, it can be known from fig. 8 that an annular rolling groove 501 needs to be formed by recessing towards the inner side of the bottom case 200, and then the upper end of the bottom case 200 is bent towards the inner side of the bottom case 200 to form a groove body structure 502 for supporting the insulating ring 300, an upper wall surface of the groove body structure 502 is a lower surface of the bent portion 232, and a lower wall surface of the groove body structure 502 is an upper contour forming the annular rolling groove 501 by recessing. However, in this structure, the annular rolling groove 501 occupies a part of the height of the bottom chassis 200, and reduces the space utilization rate of the bottom chassis 200 in the height direction, and at the same time, the bottom chassis 200 is bent by the recess and the bend, so that the strength of the bottom chassis 200 is reduced.

Referring to fig. 3, 4, 6 and 7, an embodiment provides a housing structure for a button cell, including an upper cover 100, a bottom case 200 and an insulating ring 300. Wherein:

as shown in fig. 2 to 4, the bottom case 200 has a bottom wall 210, a side wall 220 and an abutting wall 230, the side wall 220 is annularly disposed on the bottom wall 210, the abutting wall 230 extends from the other end of the side wall 220 to a side away from the bottom wall 210, an inner wall surface of the abutting wall 230 and an end surface of the other end of the side wall 220 cooperate to form an abutting groove 240, and a notch of the abutting groove 240 is disposed inward of the abutting wall 230.

As shown in fig. 2 and 3, the insulating ring 300 is disposed in the abutting groove 240, an outer ring of the insulating ring 300 is in abutting engagement with both the abutting wall 230 and the side wall 220, and an outer edge of the upper cover 100 is in abutting engagement with an inner ring of the insulating ring 300, so that the upper cover 100 and the bottom case 200 are in insulating engagement.

This a shell structure for button cell, the terminal surface cooperation of the internal face of butt wall 230 and the other end of lateral wall 220 forms butt groove 240, butt groove 240 and drain pan 200 insulation fit are passed through to the outer loop of insulating ring 300, and the inner ring insulation fit of upper cover 100 and insulating ring 300, thereby realize the insulation fit of upper cover 100 and drain pan 200, compare the tradition and need set up annular slot rolling 501 and carry out the structure of buckling again, annular slot rolling 501 has not only been reduced to the space occupancy of drain pan 200 on the direction of height, and the bending deformation volume of drain pan 200 has also been reduced, make the intensity performance of structure obtain guaranteeing.

In one embodiment, referring to fig. 3 and 4, the abutting wall 230 has an extending portion 231 and a bending portion 232, which are both annularly disposed, the extending portion 231 is located between the side wall 220 and the bending portion 232 and extends towards a side away from the bottom wall 210, the bending portion 232 extends inwards relative to the extending portion 231, the thickness of the extending portion 231 is smaller than that of the side wall 220, so that an end surface of the other end of the side wall 220, an inner wall surface of the extending portion 231, and an inner wall surface of the bending portion 232 cooperate to form the abutting groove 240.

As shown in fig. 3 and 4, an end surface of the other end of the side wall 220, that is, an end surface of the upper end of the side wall 220 in the viewing angle of fig. 3 and 4, forms an abutting groove 240 in cooperation with an inner wall surface of the abutting wall 230, and a notch of the abutting groove 240 faces the inside of the bottom case 200.

As shown in fig. 4, the extending portion 231 extends upward from the upper end surface of the sidewall 220 (the bottom wall 210 is located below the sidewall 220, and the extending portion 231 extends toward the side away from the bottom wall 210), and the bending portion 232 extends leftward from the upper end of the extending portion 231, which means that the bending portion 232 bends inward relative to the extending portion 231, and the bending portion 232 in fig. 4 extends substantially horizontally and substantially at a right angle to the extending portion 231.

In one embodiment, referring to fig. 3, when projected in the depth direction of the bottom case 200, a projected contour of an inner edge of the other end of the sidewall 220 is located within a projected contour of an outer edge of the bending portion 232.

In one embodiment, referring to fig. 3, the insulating ring 300 has a first edge 301, the first edge 301 is located on a side of the upper cover 100 away from the bottom wall 210, and a predetermined interval is provided between the first edge 301 and an outer edge of the bent portion 232.

As shown in fig. 3, in the height direction of the bottom chassis 200 (i.e., the depth direction of the bottom chassis 200), i.e., the up-down direction in the view of fig. 3, the left edge of the sidewall 220 is located at the right side of the left edge of the bent portion 232, and the left edge of the upper side of the insulating ring 300 is located at the left side of the left edge of the bent portion 232. So set up, can make insulating circle 300 pass through better cooperation of butt groove 240 with drain pan 200 on the one hand, on the other hand can make again between upper cover 100 and the butt wall 230 contactless to avoid switching on and arouse the short circuit.

In one embodiment, referring to fig. 1, fig. 2 and fig. 6, the sidewall 220 is disposed in a circular ring shape, the bending portion 232 and the extending portion 231 are both disposed in a circular ring shape, and the upper cover 100 is disposed in a circular plate shape.

In one embodiment, referring to fig. 3, 4 and 6, an outer diameter of the sidewall 220 is equal to an outer diameter of the extension 231, and an inner diameter of the sidewall 220 is greater than an inner diameter of the extension 231, so that a stepped groove is formed between an end surface of the other end of the sidewall 220 and an inner wall surface of the extension 231.

As shown in fig. 3 and 6, a step does not exist at a connection portion between the outer wall of the side wall 220 and the outer wall of the extension 231, and both have the same diameter, so that the bottom case 200 has a straight cylinder type structure, not the conventional structure of fig. 8; there is a step between the inner wall of the sidewall 220 and the inner wall of the extension 231, and the diameters of the two are different, so that the end surface of the sidewall 220 far from the bottom wall 210 becomes the groove wall of the abutting groove 240.

In one embodiment, referring to fig. 5, the upper cap 100 has a cap body 110, a connection ring 120 and an abutment ring 130, wherein the connection ring 120 is circumferentially disposed on the outer periphery of the cap body 110 and is used for connecting the cap body 110 and the abutment ring 130. The connection ring 120 is bent toward one side of the bottom case 200, so that the abutting ring 130 is located on one side of the cover body 110 facing the bottom case 200, and an outer edge of the abutting ring 130 is in abutting engagement with an inner ring of the insulation ring 300.

In one embodiment, referring to fig. 2, 6 and 7, the bottom wall 210, the side wall 220 and the abutting wall 230 are integrally formed.

In one embodiment, referring to fig. 5, the cap body 110, the connection ring 120 and the abutment ring 130 are provided in an integral structure.

Referring to fig. 1 and fig. 2, another embodiment provides a button cell, which includes a cell assembly 400 and a casing structure for a button cell as described in any of the above embodiments, the bottom case 200 and the upper cover 100 are in insulated fit to form a cell cavity, and the cell assembly 400 is disposed in the cell cavity.

This button cell adopts aforementioned a shell structure for button cell, compares the tradition and has both set up annular rolling groove 501 and carry out the structure of the drain pan 200 of buckling, has not only reduced annular rolling groove 501 to the space occupancy of drain pan 200 on the direction of height, has also reduced the deformation volume of buckling of drain pan 200 moreover for the strength properties of structure obtains guaranteeing, and makes button cell's structure compacter.

In one embodiment, the electrode assembly 400 includes a first pole piece, a second pole piece, and a diaphragm, the first pole piece and the second pole piece are wound and disposed to form a winding core structure, the diaphragm is disposed between the first pole piece and the second pole piece to insulate the first pole piece and the second pole piece, the first pole piece is electrically connected to the upper cover 100, and the second pole piece is electrically connected to the bottom case 200.

In one embodiment, the first pole piece is provided with at least one first tab, and the first tab is electrically connected to the upper cover 100; the second pole piece is provided with at least one second tab, and the second tab is electrically connected to the bottom case 200.

Alternatively, one of bottom case 200 and upper cover 100 is a positive case, the other of bottom case 200 and upper cover 100 is a negative case, and the first tab is welded to the positive tab and the second tab is welded to the negative case.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, but are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the utility model.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will 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. As used herein, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are for purposes of illustration only and do not denote a single embodiment.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent should be subject to the appended claims.

Claims (10)

1. A shell structure for a button cell, comprising:

an upper cover;

the bottom shell is provided with a bottom wall, a side wall and a butting wall, the side wall is annularly arranged on the bottom wall, the butting wall extends from the other end of the side wall to one side far away from the bottom wall, the inner wall surface of the butting wall is matched with the end surface of the other end of the side wall to form a butting groove, and a notch of the butting groove is arranged towards the inside of the butting wall;

the insulating ring is arranged in the abutting joint groove, the outer ring of the insulating ring is in abutting joint with the abutting joint wall and the side wall in abutting joint matching, and the outer edge of the upper cover is in abutting joint with the inner ring of the insulating ring in matching, so that the upper cover is in insulating matching with the bottom shell.

2. The casing structure for button cells according to claim 1, wherein the abutting wall has an extending portion and a bending portion, both of which are annularly disposed, the extending portion is located between the side wall and the bending portion and extends toward a side away from the bottom wall, the bending portion extends toward the inside of the ring relative to the extending portion, and the thickness of the extending portion is smaller than that of the side wall, so that an end surface of the other end of the side wall, an inner wall surface of the extending portion and an inner wall surface of the bending portion cooperate to form the abutting groove.

3. The casing structure for button batteries according to claim 2, wherein the projected contour of the inner edge of the other end of the side wall is located inside the projected contour of the outer edge of the bent portion when projected in the depth direction of the bottom case;

the insulating ring is provided with a first edge, the first edge is positioned on one side, far away from the bottom wall, of the upper cover, and a preset interval is formed between the first edge and the outer edge of the bent part.

4. The casing structure for button cells according to claim 3, wherein the side wall is circular, the bent portion and the extending portion are circular, and the upper cover is circular.

5. The casing structure for button cells according to claim 4, characterized in that the outside diameter of the side wall is equal to the outside diameter of the extension, and the inside diameter of the side wall is greater than the inside diameter of the extension, so that a stepped groove is formed between the end face of the other end of the side wall and the inner wall face of the extension.

6. The casing structure for button batteries according to any of claims 1 to 5, characterized in that said upper cover has a cover body, a connection ring and an abutment ring, said connection ring being provided around the periphery of said cover body and serving to connect said cover body and said abutment ring; the connecting ring is bent towards one side of the bottom shell, so that the abutting ring is located on one side, facing the bottom shell, of the cover body, and the outer edge of the abutting ring is in abutting fit with the inner ring of the insulating ring.

7. Housing structure for button cells according to claim 6, characterized in that said bottom wall, said side walls and said abutment wall are provided in a single structure; or/and the cover body, the connecting ring and the abutting ring are arranged in an integral structure.

8. A button cell, comprising:

an electrical core assembly;

the casing structure for button cell as set forth in any of claims 1-7, wherein said bottom casing and said top cover are insulated and matched to form a cell cavity, and said cell assembly is disposed in said cell cavity.

9. The button cell according to claim 8, wherein the electrode assembly comprises a first pole piece, a second pole piece and a diaphragm, the first pole piece and the second pole piece are wound to form a winding core structure, the diaphragm is arranged between the first pole piece and the second pole piece to insulate the first pole piece and the second pole piece, the first pole piece is electrically connected with the upper cover, and the second pole piece is electrically connected with the bottom case.

10. The button cell according to claim 9, wherein the first pole piece is provided with at least one first tab, and the first tab is electrically connected with the upper cover; the second pole piece is provided with at least one second pole lug, and the second pole lug is electrically connected with the bottom shell.

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