CN201369367Y - Power lithium battery bare cell with double-tab structure - Google Patents
Power lithium battery bare cell with double-tab structure Download PDFInfo
- Publication number
- CN201369367Y CN201369367Y CNU2009201144550U CN200920114455U CN201369367Y CN 201369367 Y CN201369367 Y CN 201369367Y CN U2009201144550 U CNU2009201144550 U CN U2009201144550U CN 200920114455 U CN200920114455 U CN 200920114455U CN 201369367 Y CN201369367 Y CN 201369367Y
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- China
- Prior art keywords
- lithium battery
- tab
- electric core
- negative electrode
- naked electric
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- Expired - Fee Related
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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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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The utility model relates to a power lithium battery bare cell with double-tab structure. A long tab and a short tab are arranged at the left and the right sides of a strip negative electrode slice respectively, wherein the long tab is made of a copper sheet, and the short tab is made of a nickeling copper sheet or a nickel sheet. The long tab and the short tab are respectively and fixedly connected at the no-coating blanks of current collectors at the two sides of the strip negative electrode slice. A positive electrode slice, a membrane and the negative electrode slice are laminated and then coiled into the short tab at the inner end of the bare cell and the long tab at the outer end of the bare cell. The long tab and the short tab are sequentially folded to the center of the bottom of the bare cell for superposition and then are in spot welding with a battery steel shell. The power lithium battery bare cell has the advantages that: 1, the heavy current charge-discharge property of the lithium battery can be improved; 2, the characteristics of simple process and high production efficiency of the coiled lithium battery are maintained; 3, the nickel resource is saved; 4, the welding stability of the tabs is ensured.
Description
Technical field
The utility model relates to a kind of lithium ion battery, the naked electric core of especially a kind of dynamic lithium battery of bipolar ear structure.
Background technology
In recent years, because of lithium ion battery has the operating voltage height, energy density is big, memory-less effect, have extended cycle life and advantage such as pollution-free is constantly widened its application, and the performance requirement to its each side also improves constantly simultaneously.Along with lithium battery application in daily life, people understand gradually and have affirmed the lithium battery superiority of other system batteries relatively, to the requirement and the also raising gradually of expectation of lithium battery.Initial capacity type lithium battery has been widely used in the portable electric appts such as mobile phone, notebook computer, digital camera, and the power lithium battery of now big electric current high-multiplying power discharge also begins to be applied in the electronic equipment inseparable with people's productive life such as electric tool, battery vehicle, mine lamp.
As everyone knows, making the comparatively general method of the naked electric core of lithium battery now is to adopt the takeup type method: promptly the single lug of positive and negative electrode sheet is welded on an end of strip positive and negative electrode sheet, place membrane coil between the positive and negative electrode sheet around forming the naked electric core of lithium battery, be characterized in that technology is simple, the production efficiency height.But during this charging and discharging lithium battery only by single-ended connection collector, harmony to battery charging and discharging has certain influence, internal resistance is higher relatively, limited the application of lithium battery on electrokinetic cell of this structure, on the other hand, present technology generally all uses nickel strap as lug, but nickel is rare precious metal, production cost is higher, and the electric conductivity of nickel material is also inferior to copper product; And adopt copper polar ear, and can reduce cost, reduce the internal resistance of cell, improve the high rate during charging-discharging of battery, but be to use general equipment welding unstable, qualification rate is low.
Summary of the invention
For overcoming the above-mentioned shortcoming of prior art, the utility model provides a kind of naked electric core of dynamic lithium battery with bipolar ear structure, can improve the performance of high current charge-discharge of the lithium battery of takeup type structure greatly, adopt nickel plating copper sheet or copper sheet to make lug simultaneously, save valuable nickel resources.
The naked electric core of a kind of dynamic lithium battery of bipolar ear structure, form naked electric core by electrode film, barrier film, the stacked coiling of negative electrode plate, it is characterized in that the described strip negative electrode plate left and right sides is provided with long ear-pole and short lug respectively, described long ear-pole is made by copper sheet, and described short lug is made by nickel plating copper sheet or nickel sheet; Described electrode film, barrier film, negative electrode plate be stacked be wound into described short lug in the inner end of cylindrical naked electric core, described long ear-pole is in the outer end of cylindrical naked electric core.
Described long ear-pole, short lug do not have the empty paper tinsel of coating place by the collector that dc spot welding or ultrasonic bonding or riveted joint mode are fixedly connected on strip negative electrode plate both sides respectively.
The center that described long ear-pole, short lug are folded to naked electric core bottom successively overlaps and is spot-welded together with battery steel shell.
Compared with prior art, advantage of the present utility model is: the one, can improve the high rate during charging-discharging of lithium battery; Next is the characteristics that technology is simple, production efficiency is high that kept coiling type lithium battery; The 3rd, saved nickel resources; The 4th, guaranteed the welding stability of lug.
Description of drawings
Fig. 1 is the structural representation of negative electrode plate of the present utility model and lug;
Fig. 2 is electrode film of the present utility model, barrier film, the stacked schematic diagram of negative electrode plate
Fig. 3 is the structural representation of the naked electric core of the utility model coiling back lithium battery;
Fig. 4 is folded to schematic diagram for the bipolar ear of the naked electric core of lithium battery of the utility model after reeling.
Specific embodiments
Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.
As shown in Figure 1 and Figure 2, the naked electric core of a kind of dynamic lithium battery of bipolar ear structure forms naked electric core 7 by electrode film 5, barrier film 6, negative electrode plate 3 stacked coilings.Long ear-pole 1 and short lug 2 are set respectively in strip negative electrode plate 3 left and right sides, and described long ear-pole 1 is made by copper sheet; Described short lug 2 is made by nickel plating copper sheet or nickel sheet.Described long ear-pole 1 or short lug 2 do not have the empty paper tinsel of coating 4 places by the collector that dc spot welding or ultrasonic bonding or riveted joint mode are fixedly connected on strip negative electrode plate 3 both sides.
When as shown in Figure 3, Figure 4, reel in described electrode film 5, barrier film 6, negative electrode plate 3 stacked backs described short lug 2 in the inner end of cylindrical naked electric core 7, described long ear-pole 1 is in the outer end of cylindrical naked electric core 7.The center that successively long ear-pole 1, short lug 2 is folded to naked electric core 7 bottoms overlaps and is spot-welded together with battery steel shell.
Present embodiment is that example specifies with a kind of dynamic lithium battery assembling process:
The long ear-pole 1 of the naked electric core 7 of dynamic lithium battery and short lug 2 lay respectively at the position, the left and right sides of negative electrode plate 3, and the mode of employing spot welding or ultrasonic bonding or rivet welding does not have the empty paper tinsel 4 of coating with the collector of negative electrode plate 3 and is connected.Electrode film 5, barrier film 6, negative electrode plate 3 stacked coilings and make short lug 2 in the inner end of cylindrical naked electric core 7, long ear-pole 1 is in the outer end.Load onto insulation spacer, long ear-pole 1 and the center that short lug 2 is folded to electric core 7 are respectively overlapped, again naked electric core 7 is encased in the battery steel shell, insert of coincidence place of the capillary of special shape to two lugs, naked electric core 7 and capillary are placed in the copper mold up and down of spot welding machine and weld, once after the welding capillary is rotated to an angle, carry out multiple welding again, weld the dynamic lithium battery that continues the normal operation in back after finishing and form a bipolar ear structure
The beneficial effects of the utility model are: the length Double-pole lug structure that copper sheet and nickel plating copper sheet or nickel sheet are made Be equipped with special-purpose capillary and can guarantee that weld has a plurality of stability and the good solder joint of reliability, so that lithium battery Internal resistance and high rate during charging-discharging be better than prior art. In a word, be consider production cost and battery performance it Between the optimization selection of composite factor.
Claims (3)
1, the naked electric core of a kind of dynamic lithium battery of bipolar ear structure, form naked electric core (7) by electrode film (5), barrier film (6), the stacked coiling of negative electrode plate (3), it is characterized in that described strip negative electrode plate (3) left and right sides is provided with long ear-pole (1) and short lug (2) respectively, described long ear-pole (1) is made by copper sheet, and described short lug (2) is made by nickel plating copper sheet or nickel sheet; Described electrode film (5), barrier film (6), negative electrode plate (3) be stacked be wound into described short lug (2) in the inner end of cylindrical naked electric core (5), described long ear-pole (1) is in the outer end of cylindrical naked electric core (5).
2, the naked electric core of the dynamic lithium battery of a kind of bipolar ear structure according to claim 1 is characterized in that collector that described long ear-pole (1), short lug (2) are fixedly connected on strip negative electrode plate (3) both sides by dc spot welding or ultrasonic bonding or riveted joint mode does not respectively have the empty paper tinsel of coating (4) and locates.
3, the naked electric core of the dynamic lithium battery of a kind of bipolar ear structure according to claim 1 and 2 is characterized in that center that described long ear-pole (1), short lug (2) are folded to naked electric core (7) bottom successively overlaps and spot-welded together with battery steel shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009201144550U CN201369367Y (en) | 2009-02-26 | 2009-02-26 | Power lithium battery bare cell with double-tab structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009201144550U CN201369367Y (en) | 2009-02-26 | 2009-02-26 | Power lithium battery bare cell with double-tab structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201369367Y true CN201369367Y (en) | 2009-12-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2009201144550U Expired - Fee Related CN201369367Y (en) | 2009-02-26 | 2009-02-26 | Power lithium battery bare cell with double-tab structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201369367Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102315412A (en) * | 2011-10-24 | 2012-01-11 | 力神迈尔斯动力电池系统有限公司 | Lithium ion power battery pole group |
| CN103035954A (en) * | 2012-12-28 | 2013-04-10 | 常州华科新能源科技有限公司 | Winding lithium ion battery and fabrication method thereof |
| CN107170948A (en) * | 2017-02-21 | 2017-09-15 | 深圳市比克动力电池有限公司 | A kind of Double-pole lug cylindrical lithium ion battery and preparation method thereof |
| CN108340062A (en) * | 2018-01-30 | 2018-07-31 | 郑州比克电池有限公司 | A kind of bipolar ear welding method of lithium ion battery improving the solder bar service life |
| CN113363486A (en) * | 2021-05-28 | 2021-09-07 | 东莞维科电池有限公司 | Soft package lithium ion battery |
-
2009
- 2009-02-26 CN CNU2009201144550U patent/CN201369367Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102315412A (en) * | 2011-10-24 | 2012-01-11 | 力神迈尔斯动力电池系统有限公司 | Lithium ion power battery pole group |
| CN103035954A (en) * | 2012-12-28 | 2013-04-10 | 常州华科新能源科技有限公司 | Winding lithium ion battery and fabrication method thereof |
| CN103035954B (en) * | 2012-12-28 | 2016-04-06 | 常州华科新能源科技有限公司 | A kind of coiled lithium ion battery and preparation method thereof |
| CN107170948A (en) * | 2017-02-21 | 2017-09-15 | 深圳市比克动力电池有限公司 | A kind of Double-pole lug cylindrical lithium ion battery and preparation method thereof |
| CN108340062A (en) * | 2018-01-30 | 2018-07-31 | 郑州比克电池有限公司 | A kind of bipolar ear welding method of lithium ion battery improving the solder bar service life |
| CN113363486A (en) * | 2021-05-28 | 2021-09-07 | 东莞维科电池有限公司 | Soft package lithium ion battery |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091223 Termination date: 20130226 |