CN218568914U - Button cell and sealing die - Google Patents

Abstract

The utility model relates to a button cell, including sealing body, casing and insulating part. The notch end of the shell is bent towards the inner side of the shell to form a first bent part, the pipe orifice of the groove bottom surface of the insulating part far away from the shell is bent towards the inner side of the insulating part to form a second bent part, and the second bent part is clamped between the inner side wall of the first bent part and the bottom end face of the sealing body. The inner side wall of one end, close to the groove bottom surface of the shell, of the insulating part is circumferentially provided with an inwards concave clamping groove, the notch end of the sealing body is bent and extended towards the outer side direction of the sealing body to form a third bending part, and the third bending part is connected with the clamping groove in a clamping mode. The pipe orifice of the insulating part close to the groove bottom surface of the shell is bent towards the inner side of the insulating part to form a fourth bent part, and the fourth bent part is clamped between the third bent part and the groove bottom surface of the shell. The utility model discloses still relate to a mould that seals that is used for above-mentioned button cell's processing of sealing.

Description

Button cell and sealing die

Technical Field

The utility model relates to a battery field especially relates to a button cell and be used for preparing this button cell's mould that seals.

Background

This section provides background information related to the present application which does not necessarily form the prior art.

Button cells (also called button cells) are all metal-shell sealed cells, which have the advantages of small cell size, high operating voltage, high energy density, long cycle life and no memory effect, have become the main power source of various portable electronic products, and are widely used in computers, hearing aids, electronic watches, tablet computers and various small electronic products.

In button cell's production process, need seal the battery, current mode of sealing is that the body and the casing of sealing with button cell combine and utilize the sealing mould to seal tentatively, when sealing, will have tentatively combined the body and the casing of sealing put into the lower mold core of sealing the mould, then carry out the compound die and closely compress tightly sealing body and casing and can accomplish button cell's sealing together.

The existing sealing mold is unreasonable in structure, low in sealing alignment accuracy, prone to deformation of button cell products, unstable in size and prone to affecting the quality safety of the products.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a lack to prior art exists, provides a button cell and is applicable to the mould that seals of preparing this button cell for button cell's the more inseparable reliability of sealing through the combination with button cell institutional advancement and the mould institutional advancement that seals these two aspects.

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

the button battery comprises a sealing body, a shell and an insulating part, wherein the sealing body and the shell are of a cylindrical groove body structure, and the insulating part is of a cylindrical pipe body structure. Seal the body with the insulating part all sets up the inside of casing, the insulating part sets up seal the body with between the casing, seal the tank bottom surface of the body with the tank bottom surface of casing sets up relatively, forms between the tank bottom surface of the casing and the tank bottom surface of the body of sealing and holds the installation of chamber in order to carry out electric core subassembly. The outer side wall of the sealing body is in contact with the inner side wall of the insulating part, and the outer side wall of the insulating part is in contact with the inner side wall of the shell. For convenience of description, the nozzle of the insulator near the bottom of the groove of the housing is referred to as a "first nozzle", and the nozzle of the insulator away from the bottom of the groove of the housing is referred to as a "second nozzle".

The notch end of the shell is bent towards the inner side of the shell to form a first bent part, the second pipe orifice of the insulating part is bent towards the inner side of the insulating part to form a second bent part, and the second bent part is clamped between the inner side wall of the first bent part and the bottom end face of the sealing body. The middle part of the tank bottom face of the sealing body is towards keeping away from the direction protrusion of the tank bottom face of the shell forms a protruding part, the first bending part and the second bending part are wound around the protruding part circumferential direction is arranged, and the first bending part is not in contact with the protruding part.

The inner side wall of one end, close to the first pipe orifice, of the insulating part is circumferentially provided with an inwards concave clamping groove, the groove opening end of the sealing body is bent and extended towards the outer side direction of the sealing body to form a third bending portion, and the third bending portion is connected with the clamping groove in a clamping mode. And the first pipe orifice of the insulating part is bent towards the inner side of the first pipe orifice to form a fourth bent part, and the fourth bent part is clamped between the third bent part and the groove bottom surface of the shell.

The first bending part and the second bending part form a seal of the button cell, the seal body is fixed inside the shell through the cooperation of the first bending part and the fourth bending part, and the connection strength of the seal body inside the shell is further improved through the clamping connection of the third bending part and the clamping groove.

From the viewpoint of further improving the sealing performance of the button cell, the diameter of one end of the casing close to the groove bottom surface of the casing is smaller than that of the other end of the casing, for convenience of description, the end with the larger diameter of the casing is called a first large end, the end with the smaller diameter of the casing is called a first small end, an arc transition part is formed at the joint of the first large end of the casing and the first small end of the casing, and the first small end of the casing and one end of the sealing body close to the third bending part are matched to clamp the insulating part, so that the sealing performance of the accommodating cavity is further improved.

The outer side wall and the top end face of the shell of the button cell can be used as the positive electrode connecting end of the cell, and the protruding portion of the button cell can be used as the negative electrode connecting end of the cell.

In one embodiment, the groove bottom surface of the sealing body is used as a reference surface, and the height of the protruding part is smaller than that of the first bending part, so that the protruding part does not protrude from the shell, and the button cell can be placed stably.

In one embodiment, the top end face of the shell is provided with a positive pole mark.

Due to the structural improvement of the button cell, correspondingly, a sealing mold for carrying out sealing treatment to prepare the button cell is also correspondingly improved in structure, so that the tightness of the button cell is ensured. The utility model provides a mould seals suitable for above-mentioned button cell, includes the lower mould and the last mould that set up relatively.

The lower mould is including lower mold core, should be down the upper surface of mold core concave be equipped with button cell's casing corresponds seals the recess, seals the lateral wall contact of the inside wall of recess and the notch end of casing, first push rod runs through seal the tank bottom surface of recess the middle part and with button cell's the bulge contact of the body of sealing, first push rod is not more than the width of bulge with the width of bulge contact one end.

The upper die comprises an upper die core, the lower surface of the upper die core is provided with a containing groove for containing the button cell, the inner side wall of the containing groove is in contact with the outer side wall of the shell, and the second push rod penetrates through the middle of the bottom surface of the containing groove and is in contact with the top end face of the shell of the button cell. The diameter of the end, close to the bottom surface of the groove, of the accommodating groove is smaller than that of the other end of the accommodating groove, for convenience of description, the end, with the larger diameter, of the accommodating groove is called a second large end, the end, with the smaller diameter, of the accommodating groove is called a second small end, and a step portion is formed at the joint of the second large end of the accommodating groove and the second small end of the accommodating groove. The inside wall of second tip contacts with the lateral wall of first tip, and the inside wall of second main aspects contacts with the lateral wall of first main aspects, and step portion and transition portion contact.

The method for preparing the button cell by using the sealing mould comprises the following steps:

s001, placing a sealing body, a shell and an insulating piece of the button battery into a placing cavity formed by a sealing groove and an accommodating groove after the sealing body, the shell and the insulating piece of the button battery are preliminarily combined;

step S002, the first push rod and the second push rod are pushed simultaneously, the first push rod and the second push rod clamp the button cell, at the moment, the first bending portion of the shell and the second bending portion of the insulating part are bent towards the inner side, so that the shell is deformed and closed, meanwhile, the step portion extrudes towards the transition portion of the shell, so that the shell is prevented from shifting along the horizontal direction, the first small end of the shell and one end, close to the third bending portion, of the sealing body are matched to clamp the insulating part, and therefore the reliability of sealing of the button cell is guaranteed.

The utility model provides a button cell and the combination of sealing the mould for button cell's leakproofness is excellent.

To illustrate the structural features and functions of the present invention more clearly, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

Drawings

The accompanying drawings further illustrate the present invention, but the embodiments in the drawings do not constitute any limitation to the present invention.

Fig. 1 is a schematic structural view of a button battery according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a button cell according to an embodiment of the present invention;

fig. 3 is a front view of a button cell according to an embodiment of the present invention;

FIG. 4 isbase:Sub>A cross-sectional view A-A of FIG. 3;

fig. 5 is a schematic structural view of a sealing mold according to an embodiment of the present invention;

fig. 6 is a front view of a sealing mold according to an embodiment of the present invention;

fig. 7 is a sectional view B-B of fig. 6.

Wherein the reference numbers are: 100. a button cell; 110. a sealing body; 111. a projection; 120. a housing; 121. a first large end; 122. a first small end; 123. a transition section; 130. an insulating member; 131. a first orifice; 132. a second orifice; 133. a clamping groove; 141. a first bent portion; 142. a second bent portion; 143. a third bent portion; 144. a fourth bent portion; 150. an accommodating chamber; 200. sealing the mold; 210. a lower mold core; 211. sealing the groove; 220. an upper mold core; 221. an accommodating recess; 222. a step portion; 310. a first push rod; 311. a first engaging block; 312. a first spring; 320. a second push rod; 321. a second engaging block; 322. a second spring; 400. a pressing part.

Detailed Description

It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. 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, features defined as "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be mechanically coupled, directly coupled, or indirectly coupled through intervening agents, both internally and/or in any other manner known to those skilled in the art. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. The first feature being "under," "beneath," and "under" the second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.

As shown in fig. 1 to 4, a button cell 100 according to an embodiment of the present invention includes a sealing body 110, a case 120, and an insulating member 130. The sealing body 110 and the casing 120 are both of a cylindrical tank structure, and the insulating member 130 is of a cylindrical tube structure. The sealing body 110 and the insulating member 130 are both disposed inside the case 120, and the insulating member 130 is disposed between the sealing body 110 and the case 120, thereby preventing the sealing body 110 and the case 120 from contacting each other to generate a short circuit.

As shown in fig. 1, the housing 120 includes a first large end 121 and a first small end 122, the first small end 122 is closer to the bottom surface of the housing 120 than the first large end 121, the diameter of the first large end 121 is larger than that of the first small end 122, and an arc-shaped transition part 123 is formed at the junction of the first large end 121 and the first small end 122.

As shown in fig. 3 and 4, the bottom surface of the sealing body 110 and the bottom surface of the casing 120 are disposed opposite to each other, and a receiving cavity 150 is formed between the bottom surface of the casing 120 and the bottom surface of the sealing body 110 for mounting a battery pack (not shown). The outer sidewall of the sealing member 110 contacts the inner sidewall of the insulating member 130, and the outer sidewall of the insulating member 130 contacts the inner sidewall of the case 120. The insulating member 130 includes a first nozzle 131 and a second nozzle 132, and the first nozzle 131 is adjacent to the bottom surface of the groove of the housing 120.

As shown in fig. 4, the notch end of the housing 120 is bent toward the inner side to form a first bent portion 141, the second tube opening 132 of the insulating member 130 is bent toward the inner side to form a second bent portion 142, the second bent portion 142 is clamped between the inner sidewall of the first bent portion 141 and the bottom end surface of the sealing member 110, and the first bent portion 141 and the second bent portion 142 form a sealing structure. The middle of the groove bottom surface of the sealing body 110 protrudes away from the groove bottom surface of the housing 120 to form a protruding portion 111, the first bent portion 141 and the second bent portion 142 are both disposed circumferentially around the protruding portion 111, and the first bent portion 141 is not in contact with the protruding portion 111, i.e., there is a gap between the first bent portion 141 and the protruding portion 111, and the protruding portion 111 does not protrude from the notch of the housing 120. An inward concave engaging groove 133 is circumferentially formed on an inner side wall of one end of the insulating member 130 close to the first pipe orifice 131, the notch end of the sealing body 110 is bent and extended towards the outer side direction thereof to form a third bent portion 143, and the third bent portion 143 is engaged with the engaging groove 133. The first pipe opening 131 of the insulating member 130 is bent toward the inner side to form a fourth bent portion 144, and the fourth bent portion 144 is clamped between the third bent portion 143 and the groove bottom surface of the housing 120.

In this embodiment, the positive pole piece of the electrode assembly is connected with the casing 120 through the positive pole tab, and the negative pole piece of the electrode assembly is connected with the sealing body 110 through the negative pole tab, and the specific connection mode belongs to the prior art category, so that the description is omitted. Therefore, the outer side wall and the top end face of the casing 120 of the button cell 100 can be used as the positive electrode connecting end of the cell, and the protrusion 111 of the sealing body 110 can be used as the negative electrode connecting end of the cell.

In this embodiment, the first bent portion 141 and the second bent portion 142 form a seal of the button cell 100, and the first bent portion 141 and the fourth bent portion 143 cooperate to fix the sealing body 110 inside the case 120, and the third bent portion 143 and the engagement groove 133 engage with each other to further improve the connection strength of the sealing body 110 inside the case 120.

In this embodiment, the first small end 122 of the casing 120 cooperates with an end of the sealing member 110 close to the third bending portion 143 to clamp the insulating member 130, so as to further increase the sealing performance of the accommodating cavity 150.

As shown in fig. 5 to 7, an embodiment of the present invention provides a sealing mold 200, the sealing mold 200 is suitable for sealing the button cell 100 provided in the above embodiment, and the sealing mold 200 includes a lower mold and an upper mold which are oppositely disposed.

As shown in fig. 7, the lower mold includes a lower mold core 210, a sealing groove 211 corresponding to the casing 120 of the button cell 100 is concavely disposed on an upper surface of the lower mold core 210, an inner sidewall of the sealing groove 211 contacts with an outer sidewall of a notch end of the casing 120, a first push rod 310 penetrates through a middle portion of a groove bottom surface of the sealing groove and a top end surface of the first push rod 310 contacts with a protrusion 111 of the sealing body 110 of the button cell 100, and a width of the top end surface of the first push rod 310 is slightly smaller than a width of the protrusion 111. The middle part of the first push rod 310 is circumferentially provided with a protruding first engaging block 311, the first push rod 310 moves vertically upward until the first engaging block 311 abuts against the bottom end surface of the lower mold core 210, so the first engaging block 311 can also be regarded as a limiting block for limiting the first push rod 310 to further move vertically upward, and the outer side wall between the bottom end surface of the first push rod 310 and the first engaging block 311 is sleeved with a first spring 312.

As shown in fig. 7, the upper mold includes an upper mold core 220, a receiving groove 221 for receiving the button cell 100 is formed in a lower surface of the upper mold core 220, the receiving groove 221 includes a second small end and a second large end, a step 222 is formed at a joint of the second large end of the receiving groove 221 and the second small end of the receiving groove 221, an inner sidewall of the second small end of the receiving groove 221 contacts an outer sidewall of the first small end 122 of the housing 120, an inner sidewall of the second large end of the receiving groove 221 contacts an outer sidewall of the first large end 121 of the housing 120, and the step 222 contacts the transition portion 123. The second push rod 320 penetrates through the middle of the groove bottom surface of the accommodating groove 221, and the bottom end surface of the second push rod 320 contacts with the top end surface of the housing 120 of the button cell 100. The width of the bottom end surface of the second push rod 320 is slightly greater than the width of the top end surface of the housing 120. The bottom circumference of second push rod 320 is provided with protruding second block 321, and second block 321 is located the inside that holds recess 221 and second block 321 supports with the tank bottom surface that holds recess 221 and closes, and the top of second push rod 320 is connected with pressing the portion 400, and the second push rod 320 is located to overlap on the lateral wall of the part between pressing the portion 400 and last mold core 220 and is equipped with second spring 322. A vertically downward pressure is applied to the second push rod 320 by the pressing part 400.

In this embodiment, the first spring 312 and the second spring 322 both play a role in buffering and protecting the button cell 100 when the sealing mold 200 is used to seal the button cell 100.

In this embodiment, when the sealing mold 200 is used to seal the button cell 100, the first push rod 310 moves vertically upward and the second push rod 320 moves vertically downward, the first bending portion 141 of the housing 120 and the second bending portion 142 of the insulating member 130 are bent inward to deform and close under the clamping cooperation of the first push rod 310 and the second push rod 320, and the step portion 222 presses against the transition portion 123 of the housing 120 to prevent the displacement of the housing 120 along the horizontal direction, and the first small end 122 of the housing 120 and one end of the sealing body 110 close to the third bending portion 143 cooperate to clamp the insulating member 130, thereby ensuring the reliability of sealing the button cell 100.

All possible combinations of the technical features of the above embodiments may not be described for the sake of brevity, but should be considered as within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.

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 (4)

1. The utility model provides a button cell, button cell is including sealing body, casing and insulating part, seal the body with the casing is the cell body structure of cylinder type, the insulating part is cylinder type body structure, seal the body with the insulating part all sets up the inside of casing, the insulating part sets up seal the body with between the casing, the tank bottom surface that seals the body with the tank bottom surface of casing sets up relatively, seal the lateral wall of body with the inside wall contact of insulating part, the lateral wall of insulating part with the inside wall contact of casing, its characterized in that:

the end of the notch of the shell is bent towards the inner side of the shell to form a first bent part, the pipe orifice of the insulating piece, which is far away from the bottom surface of the groove of the shell, is bent towards the inner side of the insulating piece to form a second bent part, and the second bent part is clamped between the inner side wall of the first bent part and the bottom end surface of the sealing body;

an inwards concave clamping groove is circumferentially arranged on the inner side wall of one end, close to the groove bottom surface of the shell, of the insulating piece, the notch end of the sealing body is bent and extended towards the outer side direction of the sealing body to form a third bending part, and the third bending part is connected with the clamping groove in a clamping manner;

and the pipe orifice of the insulating piece, which is close to the groove bottom surface of the shell, is bent towards the inner side of the insulating piece to form a fourth bent part, and the fourth bent part is clamped between the third bent part and the groove bottom surface of the shell.

2. Button cell according to claim 1, characterised in that: the middle part of the tank bottom surface of the sealing body is protruded towards the direction far away from the tank bottom surface of the shell to form a protruding part, the first bending part and the second bending part are wound around the protruding part in the circumferential direction, and the first bending part is not in contact with the protruding part.

3. The button cell of claim 2, wherein: the casing includes first main aspects and first tip, first tip is close to the tank bottom surface of casing, the diameter of first tip is less than the diameter of first main aspects, first main aspects with the junction of first tip forms arc transition portion.

4. A sealing mold for sealing the button cell of claim 3, the sealing mold comprising a lower mold and an upper mold disposed opposite to each other, characterized in that:

the lower die comprises a lower die core, a sealing groove corresponding to a shell of the button battery is concavely arranged on the upper surface of the lower die core, the inner side wall of the sealing groove is contacted with the outer side wall of the notch end of the shell, a first push rod penetrates through the middle of the bottom surface of the sealing groove and is contacted with the protruding part, and the width of the end, contacted with the protruding part, of the first push rod is not more than that of the protruding part;

the upper die comprises an upper die core, the lower surface of the upper die core is provided with an accommodating groove for accommodating the button battery, the inner side wall of the accommodating groove is contacted with the outer side wall of the shell, and a second push rod penetrates through the middle of the bottom surface of the accommodating groove and is contacted with the top end surface of the shell;

the accommodating groove comprises a second large end and a second small end, the second small end is close to the bottom surface of the accommodating groove, a step part is formed at the joint of the second large end and the second small end, and the step part is in contact with the transition part.

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