CN103490031A - Positive tab, soft package lithium ion battery and method for manufacturing positive tab - Google Patents
Positive tab, soft package lithium ion battery and method for manufacturing positive tab Download PDFInfo
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- CN103490031A CN103490031A CN201310347910.2A CN201310347910A CN103490031A CN 103490031 A CN103490031 A CN 103490031A CN 201310347910 A CN201310347910 A CN 201310347910A CN 103490031 A CN103490031 A CN 103490031A
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- tab
- nickel strap
- anode ear
- aluminium strip
- seal area
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The invention discloses a positive tab, a soft package lithium ion battery and a method for manufacturing the positive tab. The soft package lithium ion battery comprises a soft package outer shell and the positive tab, wherein a positive tab socket of the soft package outer shell and the positive tab are pressed and sealed through tab adhesive adhered to the positive tab; the positive tab comprises an aluminum strip and a nickel strip; the upper end of the aluminum strip is in lap joint with the lower end of the nickel strip; the middle part of the nickel strip comprises a sealing area of the tab; one layer of tab adhesive is adhered to each of the upper and the lower surfaces of the sealing area of the nickel strip; the tab adhesive downwards extends to the front and the rear surfaces of the lap joint part of the aluminum strip and the nickel strip, and exceeds the lower end of the nickel strip; the width of the tab adhesive is greater than that of the aluminum strip. The positive tab is high in strength and is not required to be bent after being assembled, thus the labor cost can be reduced, the product percent of pass is increased, the thickness of the positive tab occupied in the battery is small, the capacity of the battery is improved, and the thickness of the soft package lithium ion battery is reduced.
Description
[technical field]
The present invention relates to soft-package battery and Soft Roll electric capacity, relate in particular to the manufacture method of a kind of anode ear, soft bag lithium ionic cell and anode ear.
[background technology]
Soft bag lithium ionic cell is comprised of positive and negative pole material, electrolyte, barrier film, lug and shell, and in order to allow lithium ion battery can charge normal electric discharge, the battery inner chamber must anhydrous vacuum.Lug is that battery is used for the parts of conduction, and its end inserts the battery inner chamber, and the other end is exposed at the battery outside.
It is that positive and negative pole material and electrolyte are different that Soft Roll electric capacity has from the structure of soft-package battery the place that similarity is different, and Soft Roll electric capacity is identical with the structure of soft-package battery anode ear, and the soft bag lithium ionic cell of indication of the present invention comprises Soft Roll electric capacity.
The positive pole of soft bag lithium ionic cell (comprising Soft Roll electric capacity) is made of aluminium strip, and negative pole is made of nickel strap, but the attaching of the middle tab with hot melt, and lug metal tape upper and lower surface respectively has one deck tab parcel, when lug passes battery case, seals.The lithium ion battery need of work installs lithium ion battery privacy protection plate additional, and the assembling of baffle and battery adopts soldering, because anodal aluminium strip does not possess the soldering performance, must weld one section nickel strap and just can carry out soldering, and this technical matters is aluminium-to-nickel.
The structure of tradition soft bag lithium ionic cell as shown in Figure 1 to Figure 3, anode ear 100 comprises aluminium strip 1 and nickel strap 2, the middle part of aluminium strip is the seal area of lug, the upper and lower surface at aluminium strip seal area position respectively attaches 1 layer of tab 3, the width of tab 3 is greater than the width of lug, and the lower end of aluminium strip upper end and nickel strap overlaps.
When aluminium-to-nickel anode ear and battery assembling, the anode ear socket of flexible package shell 200 and the tab that anode ear attaches by anode ear 3 pressing sealings.
Existing process using first attaches the upper and lower surface of the tab of equal width at anodal aluminium strip packing heat-sealable area, then hot-forming, again at the aluminium strip outer end laser spot welding exposed or one section nickel strap of ultrasonic bonding above aluminium strip, expose one section aluminium strip 1a at the joint area that turns nickel.This section aluminium strip needs repeatedly to bend in the battery pack process of assembling, because the thickness of anodal aluminium strip generally only has 0.1 millimeter, mechanical strength is very low, and the aluminium strip at the welding point place of anode ear aluminium-to-nickel is easy to fractureed or break, and causes battery to scrap.
For the anode ear that prevents this battery fractures, battery production business need to consume a large amount of aluminium strips manually this section exposed and be folded in the battery top groove, then clings with adhesive sticker.The aluminium strip exposed with regard to unlikely bending when the anode ear bending like this, can reduce the ratio that battery is scrapped, and but then, but increased human cost.In addition, increased the space that anode ear takies after the anode ear bending, limited the thickness of soft bag lithium ionic cell, made the thickness of soft bag lithium ionic cell can not be less than 3 millimeters.
[summary of the invention]
The technical problem to be solved in the present invention is to provide a kind of anode ear and manufacture method that does not need to be folded in the battery top groove.
Another technical problem that will solve of the present invention is to provide a kind of soft bag lithium ionic cell of thinner thickness.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is, a kind of anode ear, comprise aluminium strip and nickel strap, the upper end of aluminium strip and the lower end of nickel strap overlap joint, the middle part of nickel strap comprises the seal area of lug, the upper and lower surface at nickel strap seal area position respectively attaches 1 layer of tab; Described tab extends downwardly into the front and rear surfaces of aluminium strip and nickel strap overlapping part, and surpasses the lower end of nickel strap; The width of tab is greater than the width of aluminium strip.
Above-described anode ear, the both sides of aluminium strip and nickel strap overlapping part tab respectively comprise a rectangular indentation, the width of aluminium strip and nickel strap overlapping part tab is less than the width of seal area position tab.
Above-described anode ear, nickel strap top margin and side round-corner transition
A kind of soft bag lithium ionic cell, comprise flexible package shell and anode ear, the anode ear socket of flexible package shell and the tab pressing that anode ear attaches by anode ear sealing, and described anode ear is above-mentioned anode ear.
Above-described soft bag lithium ionic cell, the anode ear socket of flexible package shell and anode ear are by the tab pressing sealing at anode ear nickel strap seal area position; The overlapping part of anode ear aluminium strip and nickel strap is in below or the top of seal area.
A kind of manufacture method of above-mentioned anode ear comprises the following steps:
1) aluminium strip upper end and nickel strap lower end overlap joint;
2) after step 1 completes, in the front and rear surfaces of aluminium strip and nickel strap overlapping part, paste tab, the upper end of tab surpasses the seal area of the middle part lug of nickel strap, and the lower end of tab surpasses the lower end of nickel strap.
The manufacture method of above-described anode ear, after step 2 completes, respectively cut out out a rectangular indentation by the both sides of aluminium strip and nickel strap overlapping part tab, makes the width of aluminium strip and nickel strap overlapping part tab be less than the width of seal area position tab.
Anode ear intensity of the present invention is high, does not need bending after assembling, can save labour turnover, and improves conforming product rate, and it is little that anode ear takies cell thickness, is conducive to improve battery capacity, reduces the thickness of soft bag lithium ionic cell.
[accompanying drawing explanation]
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Fig. 1 is the front view of prior art soft bag lithium ionic cell.
Fig. 2 is the right view of prior art soft bag lithium ionic cell.
Fig. 3 is that A in Fig. 1 is to cutaway view.
Fig. 4 is the front view of embodiment of the present invention soft bag lithium ionic cell.
Fig. 5 is the right view of embodiment of the present invention soft bag lithium ionic cell.
Fig. 6 is that A in Fig. 4 is to cutaway view.
Fig. 7 is the front view of embodiment of the present invention anode ear.
Fig. 8 is that C in Fig. 7 is to cutaway view.
Fig. 9 is the partial enlarged drawing at I position in Fig. 8.
Figure 10 is the stereogram of embodiment of the present invention anode ear.
[embodiment]
The structure of embodiment of the present invention soft bag lithium ionic cell as shown in Figures 4 to 6, comprises flexible package shell 200 and anode ear 100, the tab 3 pressing sealings that the anode ear socket 200A of flexible package shell 200 and anode ear 100 attach by anode ear.
Adopt fillet R transition between nickel strap 1 top margin and side.Can greatly reduce the ratio of bad other batteries of thorn, reduce by 1% product fraction defective, the enterprise that produces 500000000 yuan per year can save 5,000,000 yuan in 1 year; Whole industry annual value of production surpasses 20,000,000,000 yuan, can save 200,000,000 yuan.
The seal area that the middle part 2a of nickel strap 2 is lug, the upper and lower surface at the seal area position of nickel strap 2 respectively attaches 1 layer of tab 3.Tab 3 extends downwardly into the front and rear surfaces of aluminium strip 1 and nickel strap 2 overlapping parts, and surpasses the lower end of nickel strap 2, makes the lower end sealing of nickel strap 2, can not contact electrolyte.
The width of tab 3 is greater than the width of aluminium strip 1 and nickel strap 2, aluminium strip 1 respectively has a rectangular indentation 3a with the both sides of nickel strap 2 overlapping part tabs 3, make aluminium strip 1 and the width b of nickel strap 2 overlapping part tabs 3 be less than the width B of seal area 2a position tab 3, width b is greater than the width b1 of aluminium strip 1 and nickel strap 2.
The overlapping part of the present embodiment anode ear aluminium strip 1 and nickel strap 2 is in the below of seal area 2a, and the anode ear exposed parts only has nickel strap 2, and aluminium strip 1 does not expose.Also overlapping part can be arranged into to the top of seal area 2a, but aluminium strip 1 do not expose, but overlapping part to leave seal area, to guarantee the sealing effectiveness of seal area still by tab 3 coatings.
1) aluminium strip 1 upper end and nickel strap 2 lower ends are overlapped by laser spot welding or ultrasonic bonding.
2) after step 1 completes, in aluminium strip 1 and the front and rear surfaces of nickel strap 2 overlapping parts, paste tab 3, the upper end of tab 3 surpasses the seal area 2a of the middle part lug of nickel strap 2, and the lower end of tab 3 surpasses the lower end of nickel strap 2.
3) after step 2 completes, a rectangular indentation 3a is respectively cut out out in aluminium strip 1 and the both sides of nickel strap 2 overlapping part tabs 3, make aluminium strip 1 and the width b of nickel strap 2 overlapping part tabs 3 be less than the width B of seal area position tab 3.
The exposed parts of embodiment of the present invention soft bag lithium ionic cell anode ear is all nickel strap, intensity is high, battery after assembling no longer needs bending cathode ear, each battery can be saved 0.03 yuan of labour cost, by 1,000 ten thousand battery meters of monthly output, can save labour turnover 300,000 yuan, can improve two percentage points of conforming products rate simultaneously; 20,000,000,000 yuan of calculating of whole industry annual value of production, 400,000,000 yuan of escapable costs of the present invention.
Because the battery after assembling no longer needs bending cathode ear, it is little that anode ear takies thickness, no longer wastes the space of battery, is conducive to improve battery capacity, and the thickness of soft bag lithium ionic cell can be less than 3 millimeters.
Claims (7)
1. an anode ear, comprise aluminium strip and nickel strap, and the upper end of aluminium strip and the lower end of nickel strap overlap joint is characterized in that the middle part of nickel strap comprises the seal area of lug, and the upper and lower surface at nickel strap seal area position respectively attaches 1 layer of tab; Described tab extends downwardly into the front and rear surfaces of aluminium strip and nickel strap overlapping part, and surpasses the lower end of nickel strap; The width of tab is greater than the width of aluminium strip.
2. anode ear according to claim 1, is characterized in that, the both sides of aluminium strip and nickel strap overlapping part tab respectively comprise a rectangular indentation, and the width of aluminium strip and nickel strap overlapping part tab is less than the width of seal area position tab.
3. anode ear according to claim 1, is characterized in that, nickel strap top margin and side round-corner transition.
4. a soft bag lithium ionic cell, comprise flexible package shell and anode ear, and the anode ear socket of flexible package shell and the tab pressing that anode ear attaches by anode ear sealing is characterized in that described anode ear is anode ear claimed in claim 1.
5. soft bag lithium ionic cell according to claim 4, is characterized in that, the anode ear socket of flexible package shell and anode ear are by the tab pressing sealing at anode ear nickel strap seal area position; The overlapping part of anode ear aluminium strip and nickel strap is in below or the top of seal area.
6. the manufacture method of an anode ear claimed in claim 1, is characterized in that, comprises the following steps:
601) aluminium strip upper end and nickel strap lower end overlap joint;
602) after step 601 completes, in the front and rear surfaces of aluminium strip and nickel strap overlapping part, paste tab, the upper end of tab surpasses the seal area of the middle part lug of nickel strap, and the lower end of tab surpasses the lower end of nickel strap.
7. the manufacture method of anode ear according to claim 6, it is characterized in that, after step 602 completes, a rectangular indentation is respectively cut out out in the both sides of aluminium strip and nickel strap overlapping part tab, make the width of aluminium strip and nickel strap overlapping part tab be less than the width of seal area position tab.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310347910.2A CN103490031B (en) | 2013-08-09 | 2013-08-09 | The manufacture method of a kind of anode ear, soft bag lithium ionic cell and anode ear |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310347910.2A CN103490031B (en) | 2013-08-09 | 2013-08-09 | The manufacture method of a kind of anode ear, soft bag lithium ionic cell and anode ear |
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| CN103490031A true CN103490031A (en) | 2014-01-01 |
| CN103490031B CN103490031B (en) | 2016-01-20 |
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| CN201310347910.2A Expired - Fee Related CN103490031B (en) | 2013-08-09 | 2013-08-09 | The manufacture method of a kind of anode ear, soft bag lithium ionic cell and anode ear |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105810874A (en) * | 2016-04-21 | 2016-07-27 | 格远电子科技（上海）有限公司 | Overload self-protection tabs for lithium battery and preparation method thereof |
| WO2017117748A1 (en) * | 2016-01-06 | 2017-07-13 | 宁德新能源科技有限公司 | Rechargeable battery |
| CN112077460A (en) * | 2020-08-27 | 2020-12-15 | 东莞市恒源新材料有限公司 | Method for manufacturing tab |
| CN112635922A (en) * | 2020-12-16 | 2021-04-09 | 宁德新能源科技有限公司 | Battery cell, battery and electric equipment |
| CN114597495A (en) * | 2022-03-21 | 2022-06-07 | 珠海冠宇电池股份有限公司 | Battery and electronic equipment |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2017117748A1 (en) * | 2016-01-06 | 2017-07-13 | 宁德新能源科技有限公司 | Rechargeable battery |
| CN108886126A (en) * | 2016-01-06 | 2018-11-23 | 宁德新能源科技有限公司 | Secondary cell |
| US10886570B2 (en) | 2016-01-06 | 2021-01-05 | Ningde Amperex Technology Limited | Secondary battery |
| US20210075066A1 (en) * | 2016-01-06 | 2021-03-11 | Ningde Amperex Technology Limited | Secondary battery |
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| CN105810874A (en) * | 2016-04-21 | 2016-07-27 | 格远电子科技（上海）有限公司 | Overload self-protection tabs for lithium battery and preparation method thereof |
| CN112077460A (en) * | 2020-08-27 | 2020-12-15 | 东莞市恒源新材料有限公司 | Method for manufacturing tab |
| CN112635922A (en) * | 2020-12-16 | 2021-04-09 | 宁德新能源科技有限公司 | Battery cell, battery and electric equipment |
| CN112635922B (en) * | 2020-12-16 | 2022-03-08 | 宁德新能源科技有限公司 | Battery cell, battery and electric equipment |
| CN114597495A (en) * | 2022-03-21 | 2022-06-07 | 珠海冠宇电池股份有限公司 | Battery and electronic equipment |
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| CN103490031B (en) | 2016-01-20 |
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