CN210403778U - Button cell for improving radial space utilization rate - Google Patents

Button cell for improving radial space utilization rate Download PDF

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Publication number
CN210403778U
CN210403778U CN201921467056.2U CN201921467056U CN210403778U CN 210403778 U CN210403778 U CN 210403778U CN 201921467056 U CN201921467056 U CN 201921467056U CN 210403778 U CN210403778 U CN 210403778U
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CN
China
Prior art keywords
button cell
cover plate
radial space
space utilization
plate
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Application number
CN201921467056.2U
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Chinese (zh)
Inventor
周显茂
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chongqing Zijian Electronic Co.,Ltd.
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Chongqing Vdl Electronics Co ltd
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Priority to CN201921467056.2U priority Critical patent/CN210403778U/en
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50Manufacturing or production processes characterised by the final manufactured product

Abstract

The utility model discloses a button cell for improving the radial space utilization rate, which comprises a metal shell and an electric core arranged in the metal shell, wherein the electric core comprises a positive plate and a negative plate, and a cover plate arranged on the metal shell, the cover plate and the metal shell have the same polarity, the cover plate and the metal shell are integrated into a whole through laser welding, so that the sealing property of a cell shell is more reliable, a convex cap is arranged at the outer side of the cover plate, an insulating part for preventing the short circuit of the cover plate and the cap is arranged between the cover plate and the cap, one of the positive plate and the negative plate is electrically connected with the metal shell or the cover plate, the other plate is electrically connected with the cap, the electric core and the outside only separate a single-layer metal shell, thereby improving the utilization rate of the radial space of the cell, simultaneously, the process of the button cell is simpler, and, the production efficiency of the battery is improved, and the qualification rate is well ensured.

Description

Button cell for improving radial space utilization rate
Technical Field
The utility model relates to a button cell field especially relates to a promote radial space utilization's button cell.
Background
The shell of the button cell in the current market is not designed integrally, and has the technical problem of poor sealing reliability, for example, the button cell disclosed in the application number 201920094848.3 comprises a positive electrode shell, a negative electrode shell and a sealing ring main body for sealing the positive electrode shell and the negative electrode shell, the sealing ring main body is compressed in an interference fit mode through the R angle sealing technology of the shell, so that the sealing function between the positive electrode shell and the negative electrode shell is realized, however, the measurement of the R angle by the prior art method is not very accurate, the good sealing performance of the cell shell cannot be completely ensured, the technical problem that the quality qualification rate cannot be ensured exists, meanwhile, the outer ring of the cell is the positive electrode shell, the inner ring is the negative electrode shell, and the sealing ring main body is arranged between the positive electrode shell and the negative electrode shell in the circumferential direction of the cell, and the multilayer structure occupies too much space in the radial direction of the cell, there is a technical problem that the radial space cannot be fully utilized.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the above-mentioned defect among the prior art, provide a metal casing leakproofness is more reliable, can promote radial space utilization's button cell.
In order to achieve the above object, the utility model provides a promote radial space utilization's button cell, including metal casing, install at the inside electric core of metal casing, electric core includes positive plate and negative plate, still including installing the apron on metal casing, the apron has the same polarity with metal casing, bellied block has been installed in the apron outside, install the insulating part that prevents apron and block short circuit between apron and the block, a pole piece is connected with the metal casing electricity in positive plate and the negative plate, and another pole piece is connected with the block electricity.
Preferably, the cover plate is provided with a liquid injection hole penetrating into the metal shell.
Preferably, the cover plate is provided with a safety valve communicated with the liquid injection hole.
Preferably, the cover plate is provided with a film for sealing the liquid injection hole.
Preferably, a bowl-shaped cover bowl is arranged on the cover plate at the same position as the thin film, and an air layer is formed between the cover bowl and the thin film.
Preferably, the metal shell is cylindrical with an opening at the upper end, and the cover plate is arranged at one end of the opening of the metal shell and is welded with the metal shell into a whole.
Preferably, the ratio of the diameter to the height of the cylindrical metal housing is greater than 1.
Preferably, the battery core is a laminated structure formed by stacking a positive plate, a diaphragm and a negative plate in a continuously circulating order.
Preferably, the battery cell is a winding structure formed by overlapping and winding a positive plate, a diaphragm and a negative plate.
Preferably, a positive tab is led out from one end face of the winding structure, a negative tab is led out from the other end face of the winding structure, the positive tab and the negative tab are respectively attached to the end face of the winding structure through insulating films, the positive tab is electrically connected with the positive plate, and the negative tab is electrically connected with the negative plate.
Compared with the prior art, the beneficial effects of the utility model reside in that:
the utility model comprises a metal shell, an electric core arranged in the metal shell, wherein the electric core comprises a positive plate, a negative plate and a cover plate arranged on the metal shell, the cover plate and the metal shell have the same polarity, and the cover plate and the metal shell are welded into a whole by laser, so that the sealing performance of the battery shell is more reliable, the outer side of the cover plate is provided with a raised cap, an insulating part for preventing the cover plate and the cap from short circuit is arranged between the cover plate and the cap, one of the positive plate and the negative plate is electrically connected with the metal shell, the other is electrically connected with the cap, a single-layer metal shell is only separated between the battery cell and the outside, therefore, the utilization rate of the radial space of the battery is improved, the process of the button battery is simpler, the requirement of full-automatic production of the battery is met, the production efficiency of the battery is improved, and the qualified rate is well guaranteed.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural view of a button cell for improving radial space utilization provided by the present invention;
fig. 2 is an exploded view of a button cell provided by the present invention to improve the radial space utilization;
fig. 3 is a front view of a button cell provided by the present invention to improve the radial space utilization;
FIG. 4 is a cross-sectional view taken at A-A of FIG. 3;
FIG. 5 is an enlarged view of a portion of FIG. 4 at I;
fig. 6 is an exploded view of a laminated cell structure;
fig. 7 is a schematic view of a first structure of a winding type cell;
fig. 8 is a second structural diagram of a winding type cell;
fig. 9 is a schematic diagram of the arrangement of the positive and negative electrode lugs on the tail end of the end surface of the battery cell;
fig. 10 is a schematic diagram of the positive and negative electrode lugs arranged in the middle of the end surface of the cell.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1-5, the utility model provides a button cell for improving radial space utilization, which comprises a metal casing 1, wherein the metal casing 1 is cylindrical with an open top, the ratio of the diameter to the height of the cylindrical metal casing 1 is greater than 1, the metal casing 1 can be formed by punching a nickel-plated deep-drawn metal sheet as a raw material, a battery cell 2 is arranged in the metal casing 1, the battery cell 2 comprises a positive plate 21 and a negative plate 22, a cover plate 3 is further arranged on the metal casing 1, the cover plate 3 is circular sheet, the cover plate 3 is arranged at the open top of the metal casing 1 and is welded with the metal casing 1 into a whole, the cover plate 3 and the metal casing 1 are made of the same material, so that good sealing performance after welding can be ensured, leakage of internal electrolyte can be prevented, the cover plate 3 and the metal casing 1 have the same polarity, the battery cover plate is characterized in that a raised cap 4 is arranged on the outer side of the cover plate 3, one raised end of the cap 4 is arranged in a cylindrical shape, an insulating part 5 for preventing the short circuit between the cover plate 3 and the cap 4 is arranged between the cover plate 3 and the cap 4, the insulating part 5 realizes the sealing between the cover plate 3 and the cap 4 through extrusion or injection molding, one of the positive plate 21 and the negative plate 22 is electrically connected with the metal shell 1, the other plate is electrically connected with the cap 4, a liquid injection hole 11 penetrating through the metal shell 1 is formed in the cover plate 3, a safety valve communicated with the liquid injection hole 11 can be arranged on the cover plate 3, electrolyte is injected into the battery through the safety valve, a film 12 for sealing the liquid injection hole 11 can also be arranged on the cover plate 3, the film 12 is used for preventing the problem of electrolyte leakage in the automatic production operation process of the battery, wherein the electrolyte is preferably lithium ion electrolyte, the lid bowl 13 of bowl form has been installed with the same position of film 12 on the apron 3, lid bowl 13 can be welded on apron 3 through laser welding's mode, form one deck air bed 14 between lid bowl 13 and the film 12, when the inside gas volume of electricity core 2 overexpansion, gas can break through film 12 and be linked together with air bed 14, air bed 14 is used for alleviating the inside gaseous pressure of battery, reduces the risk that the battery inflation explosion brought.
As shown in fig. 6, the battery cell 2 may be a laminated structure formed by stacking a positive plate 21, a separator 23, and a negative plate 22 in a continuous circulation order, each of the positive plate 21, the separator 23, and the negative plate 22 may be square or circular, the positive plate 21 is preferably an aluminum plate, the negative plate 22 is preferably nickel or copper, the negative plate 22 has a function of intercalating and deintercalating lithium ions, the separator 23 is a porous plastic plate having an electronic insulation property but capable of conducting ions, the separator 23 is made into a bag shape, one of the plates is wrapped in the bag shape, the multiple positive plates 21 are connected in parallel by welding to form a positive current collector, and the multiple negative plates 22 are connected in parallel by welding to form a negative current collector.
As shown in fig. 7 and 8, the battery cell 2 may also be a winding structure formed by stacking and winding a positive electrode sheet 21, a separator 23 and a negative electrode sheet 22, a positive lug 24 is led out from one end face of the winding structure, a negative lug 25 is led out from the other end face of the winding structure, the positive electrode tab 24 and the negative electrode tab 25 are respectively attached to the end face of the winding structure through the insulating film 7, the positive tab 24 is electrically connected with the positive plate 21, the negative tab 25 is electrically connected with the negative plate 22, the positive tab 24 and the negative tab 25 are both flat and sheet-shaped, wherein the sheet shape can be round, square or polygonal, preferably, the positive electrode tab 24 and the negative electrode tab 25 both adopt metal foils with thickness of 5 to 100 micrometers and good conductive performance, the insulating film 7 may be a sheet-shaped plastic film, which covers the side surfaces of the positive electrode tab 24 and the negative electrode tab 25 and is adhered to the end surface of the battery cell 2.
As shown in fig. 9 and 10, the positive tab 24 and the negative tab 25 are both disposed at the middle or the tail of the end surface of the electrical core 2, the positive tab 24 and the negative tab 25 disposed at the middle of the end surface of the electrical core 2 can be attached to the tail of the end surface of the electrical core 2 by bending 90 °, and the positive tab 24 and the negative tab 25 disposed at the tail of the end surface of the electrical core 2 can be attached to the middle of the end surface of the electrical core 2 by bending 90 °.
To sum up, the utility model comprises a metal casing 1, an electric core 2 installed inside the metal casing 1, the electric core 2 comprises a positive plate 21 and a negative plate 22, a cover plate 3 installed on the metal casing 1, the cover plate 3 has the same polarity with the metal casing 1, the cover plate 3 and the metal casing 1 are integrated by laser welding, so that the sealing performance of the battery shell is more reliable, a convex cap 4 is installed on the outer side of the cover plate 1, an insulating member 5 for preventing the short circuit of the cover plate 1 and the cap 4 is installed between the cover plate 1 and the cap 4, one of the positive plate 21 and the negative plate 22 is electrically connected with the metal casing 1 or the cover plate 3, the other is electrically connected with the cap 4, the electric core 2 and the outside are only separated by a single-layer metal casing, so as to improve the utilization rate of the radial space of the battery, and the process of the button battery is simpler, the requirement of full-automatic production of the battery is met, the production efficiency of the battery is improved, and the qualification rate is well guaranteed.
The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be equivalent replacement modes, and all are included in the scope of the present invention.

Claims (10)

1. The utility model provides a promote button cell of radial space utilization, includes metal casing (1), installs at inside electric core (2) of metal casing (1), electric core (2) include positive plate (21) and negative pole piece (22), its characterized in that: still including installing apron (3) on metal casing (1), apron (3) have the same polarity with metal casing (1), bellied block (4) have been installed in apron (3) outside, install insulating part (5) that prevent apron (3) and block (4) short circuit between apron (3) and block (4), a pole piece is connected with metal casing (1) electricity in positive plate (21) and negative pole piece (22), and another pole piece is connected with block (4) electricity.
2. The button cell for improving the radial space utilization rate as claimed in claim 1, wherein: and the cover plate (3) is provided with a liquid injection hole (11) which penetrates into the metal shell (1).
3. The button cell for improving the radial space utilization rate as claimed in claim 2, wherein: and a safety valve communicated with the liquid injection hole (11) is arranged on the cover plate (3).
4. The button cell for improving the radial space utilization rate as claimed in claim 2, wherein: the cover plate (3) is provided with a film (12) for sealing the liquid injection hole (11).
5. The button cell for improving the radial space utilization rate as claimed in claim 4, wherein: the cover plate (3) is provided with a bowl-shaped cover bowl (13) at the same position as the thin film (12), and an air layer (14) is formed between the cover bowl (13) and the thin film (12).
6. The button cell for improving the radial space utilization rate as claimed in claim 1, wherein: the metal shell (1) is cylindrical with an opening at the upper end, and the cover plate (3) is arranged at one end of the opening of the metal shell (1) and is welded with the metal shell (1) into a whole.
7. The button cell for improving the radial space utilization rate as claimed in claim 6, wherein: the ratio of the diameter to the height of the cylindrical metal housing (1) is greater than 1.
8. The button cell for improving the radial space utilization rate as claimed in claim 1, wherein: the battery core (2) is of a laminated structure formed by stacking a positive plate (21), a diaphragm (23) and a negative plate (22) in a continuous circulating order.
9. The button cell for improving the radial space utilization rate as claimed in claim 1, wherein: the battery core (2) is of a winding structure formed by overlapping and winding a positive plate (21), a diaphragm (23) and a negative plate (22).
10. The button cell for improving the radial space utilization rate as claimed in claim 9, wherein: draw forth anodal ear (24) on one terminal surface of winding structure, draw forth negative pole ear (25) on another terminal surface of winding structure, anodal ear (24) and negative pole ear (25) are laminated on the terminal surface of winding structure through insulating film (7) respectively, anodal ear (24) are connected with positive plate (21) electricity, negative pole ear (25) are connected with negative pole piece (22) electricity.
CN201921467056.2U 2019-09-05 2019-09-05 Button cell for improving radial space utilization rate Active CN210403778U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201921467056.2U CN210403778U (en) 2019-09-05 2019-09-05 Button cell for improving radial space utilization rate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201921467056.2U CN210403778U (en) 2019-09-05 2019-09-05 Button cell for improving radial space utilization rate

Publications (1)

Publication Number Publication Date
CN210403778U true CN210403778U (en) 2020-04-24

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ID=70340913

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201921467056.2U Active CN210403778U (en) 2019-09-05 2019-09-05 Button cell for improving radial space utilization rate

Country Status (1)

Country Link
CN (1) CN210403778U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112968235A (en) * 2021-02-03 2021-06-15 惠州亿纬锂能股份有限公司 Battery cap and battery

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112968235A (en) * 2021-02-03 2021-06-15 惠州亿纬锂能股份有限公司 Battery cap and battery
CN112968235B (en) * 2021-02-03 2022-10-14 惠州亿纬锂能股份有限公司 Battery cap and battery

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Address after: 405400 building 1-4, Puli industrial new area, Zhaojia street, Kaizhou District, Chongqing

Patentee after: Chongqing Zijian Electronic Co.,Ltd.

Address before: 405400 building 1-4, Puli industrial new area, Zhaojia street, Kaizhou District, Chongqing

Patentee before: CHONGQING VDL ELECTRONICS Co.,Ltd.