CN214848815U

CN214848815U - Ultra-thin battery

Info

Publication number: CN214848815U
Application number: CN202121151287.XU
Authority: CN
Inventors: 邓平华; 王雷
Original assignee: Jiangxi Baisili New Energy Technology Co ltd
Current assignee: Jiangxi Baisili New Energy Technology Co ltd
Priority date: 2021-05-26
Filing date: 2021-05-26
Publication date: 2021-11-23
Anticipated expiration: 2031-05-26

Abstract

The utility model provides an ultra-thin battery, including electric core, first lid and second lid all are single metal layer structure, first lid includes that the first chamber that holds and around the first flange that holds chamber opening edge formation, the second lid includes that the second holds the chamber and holds the second flange that chamber opening edge formed around the second, the first chamber that holds and the second holds the chamber combination and form the cavity that holds electric core, first flange and second flange welded fastening realize sealed between first lid and the second lid, first flange and second flange are located a tip of the length direction of electric core and are enclosed to establish and form the positive output cavity that holds anodal ear and supply anodal ear to wear to establish, another tip of the length direction of electric core is enclosed to establish and is formed to hold the negative pole ear and supply the negative pole ear to wear to establish by first flange and second flange. The first flange and the second flange are welded and fixed, so that the liquid leakage phenomenon caused by shell damage caused by heat sealing can be avoided, and the welding process is easy to realize.

Description

Ultra-thin battery

Technical Field

The utility model relates to a technical field, concretely relates to ultra-thin battery are made to the battery.

Background

With the development trend of portable consumer electronics products of intellectualization, integration, lightness, thinness and individuation, the secondary battery is more and more popular in the market due to the advantages of lightness, thinness, various shapes, reliable performance and the like. At present, soft package batteries are mostly adopted in light and thin electrochemical cells, a shell of the light and thin electrochemical cell is of a three-layer structure of polymer-aluminum foil-polymer, and top sealing and side sealing are carried out through hot pressing of an aluminum plastic film. The packaging is carried out by adopting a heat-sealing process, the parameter control of the process is strict, the process is difficult to operate, the secondary product rate is high, and the shell is easy to damage at the heat-sealing part so as to cause electrolyte leakage.

In view of this, there is a need to provide a new type of lightweight and thin secondary battery to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an ultra-thin battery, this battery not only can make very thin, and can avoid the electrolyte that the hot pressing encapsulation leads to reveal and the high problem of defective percentage.

For realizing the first purpose, the utility model provides an ultra-thin battery, including electric core, first lid and second lid, first lid with the second lid all is single metal layer structure, first lid include first hold the chamber and center on the first flange that holds chamber opening edge and form, the second lid includes the second hold the chamber and center on the second holds the second flange that chamber opening edge formed, first hold the chamber with the second holds the chamber combination and forms and hold the cavity of electric core, first flange with second flange welded fastening realizes first lid with sealed between the second lid, first flange with the second flange is located to follow one end of the length direction of electric core is enclosed to establish and is formed and hold positive ear and supply the positive output cavity that positive ear wore to establish, first flange with the second flange is located to follow another end of the length direction of electric core is enclosed to establish and is formed and is held the negative pole ear and is worn to establish and is held And the lug is used for the negative output cavity through which the negative lug penetrates.

Compared with the prior art, the utility model discloses an ultra-thin battery's first lid and second lid all are single metal layer structure, therefore can realize sealed between first lid and the second lid through first flange and second flange welded fastening, and it can avoid the heat-seal to cause the casing damage and the weeping phenomenon that produces, and welding process realizes easily. The first cavity that holds of first lid and the second of second lid hold the cavity that the chamber combination held electric core, and anodal ear and negative pole ear stretch out from the output cavity at both ends respectively, and the output cavity of formation can fix a position anodal ear, negative pole ear to avoid appearing the rosin joint problem, and anodal ear and negative pole ear are acceptd in the output cavity, can not occupy too much space, carry out the equipment of other output parts on first flange and second flange with reserving the space.

Preferably, the first flange is recessed at an end along the length direction of the battery cell in a direction away from the second flange to form the positive output cavity, or the second flange is recessed at an end along the length direction of the battery cell in a direction away from the first flange to form the positive output cavity. Or, the first flange and the second flange are recessed along a direction away from each other at one end part along the length direction of the battery cell to enclose the positive output cavity. That is, the positive output cavity can be formed by recessing the first flange or the second flange, or by recessing both the first flange and the second flange.

Preferably, the first flange is recessed in a direction away from the second flange at another end along the length direction of the battery cell to form the negative output cavity, or the second flange is recessed in a direction away from the first flange at another end along the length direction of the battery cell to form the negative output cavity. Or the first flange and the second flange are recessed along the direction away from each other at the other end part of the battery cell in the length direction to form the negative output cavity in a surrounding manner.

Preferably, both sides of the positive lug are respectively provided with a first sealant and a second sealant, and at least part of the first sealant and the second sealant is contained in the positive output cavity.

Preferably, both sides of the negative tab are respectively provided with a third sealant and a fourth sealant, and at least part of the third sealant and the fourth sealant is accommodated in the negative output cavity.

Preferably, the battery cell can be square, oval or irregular hexagon, preferably square, the size ratio of the height to the width of the battery cell is less than 1, and the height is 0.02-0.3 mm. The thickness of the first cover body and the thickness of the second cover body are both smaller than 0.3 mm.

Drawings

Fig. 1 is a schematic view of a first embodiment of the ultra-thin battery of the present invention.

Fig. 2 is an exploded view of fig. 1.

Fig. 3 is a schematic diagram of a second embodiment of the ultra-thin battery of the present invention.

Fig. 4 is an exploded view of fig. 3.

Fig. 5 is a schematic view of a third embodiment of the ultra-thin battery of the present invention.

Fig. 6 is an exploded view of fig. 5.

Detailed Description

Hereinafter, preferred embodiments of the ultra-thin battery according to the present invention will be described in detail with reference to the accompanying drawings.

As shown in fig. 1 to 6, the ultra-thin battery 100 includes a battery cell 50, a first cover 10 and a second cover 30, where the first cover 10 and the second cover 30 are both single-layer aluminum foils, the first cover 10 includes a first receiving cavity 110 and a first flange 130 formed around an opening edge of the first receiving cavity 110, the second cover 30 includes a second receiving cavity 310 and a second flange 330 formed around an opening edge of the second receiving cavity 310, the first receiving cavity 110 and the second receiving cavity 310 form a cavity for receiving the battery cell 50, and the first flange 130 and the second flange 330 are welded and fixed to achieve sealing between the first cover 10 and the second cover 30, that is, the first cover 10 and the second cover 30 are fixed by welding except for a tab around the edge of the first receiving cavity 110 and the second receiving cavity 310, and the welding manner may be laser welding. The first flange 130 and the second flange 330 surround one end portion along the length direction L of the battery cell 50 to form a positive output cavity 350 for accommodating the positive tab 510 and allowing the positive tab 510 to penetrate therethrough, and the first flange 130 and the second flange 330 surround the other end portion along the length direction L of the battery cell 50 to form a negative output cavity 370 for accommodating the negative tab 530 and allowing the negative tab 530 to penetrate therethrough.

Specifically, the positive output cavity 350 may be formed by recessing the first flange 130 at an end portion along the length direction L of the battery cell 50 in a direction away from the second flange 330, or formed by recessing the second flange 330 at an end portion along the length direction L of the battery cell 50 in a direction away from the first flange 130, or formed by recessing the first flange 130 and the second flange 330 at an end portion along the length direction L of the battery cell 50 in a direction away from each other, as shown in the figure, the positive output cavity 350 is formed by recessing the first flange 130 and the second flange 330 simultaneously. Similarly, the negative output cavity 370 is formed by the first flange 130 being recessed inward along the direction away from the second flange 330 at the other end along the length direction L of the battery cell 50, or the second flange 330 being recessed inward along the direction away from the first flange 130 at the other end along the length direction L of the battery cell 50, or the first flange 130 and the second flange 330 being recessed inward along the other end along the length direction L of the battery cell 50 to enclose, as shown in the figure, the negative output cavity 370 is formed by the first flange 130 and the second flange 330 being recessed inward at the same time.

Further, as shown in fig. 2, 4, and 6, two sides of the positive tab 510 are respectively provided with a first sealant 710 and a second sealant 730, at least a portion of the first sealant 710 and the second sealant 730 are accommodated in the positive output cavity 350, and in the L direction of the electrical core 50, the size of the first sealant 710 and the second sealant 730 is larger than that of the first flange 130, so that the excess portion is exposed out of the positive output cavity 350, the first sealant 710 and the second sealant 730 can be insulating sealants, the main material of which is rubber, PP, PE, PET, or PF, or can be conductive sealants, that is, the insulating materials have conductive particles, specifically, conductive rubber, conductive PP, conductive PE, conductive PET, or conductive PFA, and the resistance value thereof is 1 to 30000 ohm. A third sealant 750 and a fourth sealant 770 are disposed on both sides of the negative tab 530, and at least portions of the third sealant 730 and the fourth sealant 740 are received in the negative output cavity 370. In the L direction of the battery cell 50, the size of the third sealant 750 and the fourth sealant 770 is larger than that of the second flange 330, so that the excess portion is exposed out of the negative output cavity 370, which is an insulating sealant, and the main material of the insulating sealant is rubber, PP, PE, PET or PFA.

Further, the height is 0.02 to 0.3mm, and the thickness of the first cover 10 and the second cover 30 is less than 0.3mm, so that it is an ultra-thin battery. The battery cell 50 may be square, oval or irregular hexagonal, that is, the ultra-thin battery 100 may be square, oval or irregular hexagonal, which is shown in fig. 1, 3 and 5, respectively, and is preferably square, and the ratio of the height to the width is less than 1.

Compared with the prior art, the utility model discloses an ultra-thin battery 100's first lid 10 and second lid 30 all are single metal layer structure, therefore can realize the sealed between first lid 10 and the second lid 30 through first flange 130 and second flange 330 welded fastening, and it can avoid the heat-seal to cause the casing damage and the weeping phenomenon that produces, and welding process realizes easily. The first accommodating cavity 110 of the first cover 10 and the second accommodating cavity 310 of the second cover 30 are combined to accommodate the cavity of the battery cell 50, and the positive tab 510 and the negative tab 530 respectively extend out of the output cavities at the two ends, the formed output cavity can position the positive tab 510 and the negative tab 530, so as to avoid the problem of insufficient soldering, and the positive tab 510 and the negative tab 530 are accommodated in the output cavity, so that too much space is not occupied, and space is reserved on the first flange 130 and the second flange 330 for assembling other output components.

It should be finally noted that the first embodiment is only used to illustrate the technical solution of the present invention and not to limit the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solution of the present invention.

Claims

1. An ultra-thin battery (100), comprising a battery cell (50), a first cover body (10) and a second cover body (30), wherein the first cover body (10) and the second cover body (30) are both in a single metal layer structure, the first cover body (10) comprises a first accommodating cavity (110) and a first flange (130) formed around an opening edge of the first accommodating cavity (110), the second cover body (30) comprises a second accommodating cavity (310) and a second flange (330) formed around an opening edge of the second accommodating cavity (310), the first accommodating cavity (110) and the second accommodating cavity (310) are combined to form a cavity for accommodating the battery cell (50), the first flange (130) and the second flange (330) are welded and fixed to realize sealing between the first cover body (10) and the second cover body (30), and the first flange (130) and the second flange (330) are located at one end along a length direction of the battery cell (50) The part is enclosed and is established and form positive output cavity (350) that holds positive ear (510) and supply positive ear (510) are worn to establish, first flange (130) with second flange (330) are in the edge another tip of the length direction of electricity core (50) encloses and is established and form negative pole ear (530) and supply negative output cavity (370) that negative pole ear (530) were worn to establish.

2. The ultra-thin battery (100) of claim 1, wherein the first flange (130) is recessed at an end along the length of the cell (50) in a direction away from the second flange (330) to form the positive output cavity (350), or wherein the second flange (330) is recessed at an end along the length of the cell (50) in a direction away from the first flange (130) to form the positive output cavity (350).

3. The ultra-thin battery (100) of claim 1, wherein the first flange (130) and the second flange (330) are recessed at one end along the length of the battery cell (50) in directions away from each other to enclose the positive output cavity (350).

4. The ultra-thin battery (100) of claim 1, wherein the first flange (130) is recessed at another end along the length of the cell (50) in a direction away from the second flange (330) to form the negative output cavity (370), or wherein the second flange (330) is recessed at another end along the length of the cell (50) in a direction away from the first flange (130) to form the negative output cavity (370).

5. The ultra-thin battery (100) of claim 1, wherein the first flange (130) and the second flange (330) are recessed in directions away from each other at the other end along the length direction of the battery cell (50) to enclose the negative output cavity (370).

6. The ultra-thin battery (100) as claimed in claim 1, wherein a first sealant (710) and a second sealant (730) are respectively disposed on two sides of the positive tab (510), at least a portion of the first sealant (710) and the second sealant (730) are accommodated in the positive output cavity (350), the first sealant (710) and the second sealant (730) are both conductive sealants, and the resistance value is 1 to 30000 ohms.

7. The ultra-thin battery (100) of claim 1, wherein a third sealant (750) and a fourth sealant (770) are disposed on each side of the negative tab (530), at least a portion of the third sealant (750) and the fourth sealant (770) being received in the negative output cavity (370).

8. The ultra-thin battery (100) of claim 1, wherein the cell (50) is square and the ratio of the dimensions in height and width is less than 1.

9. The ultra-thin battery (100) of claim 1, wherein the height is 0.02 to 0.3 mm.

10. The ultra-thin battery (100) as claimed in claim 1, wherein the thickness of the first cover (10) and the second cover (30) are each less than 0.3 mm.