CN102064292A - Method for assembling rechargeable battery - Google Patents
Method for assembling rechargeable battery Download PDFInfo
- Publication number
- CN102064292A CN102064292A CN201010600527XA CN201010600527A CN102064292A CN 102064292 A CN102064292 A CN 102064292A CN 201010600527X A CN201010600527X A CN 201010600527XA CN 201010600527 A CN201010600527 A CN 201010600527A CN 102064292 A CN102064292 A CN 102064292A
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- Prior art keywords
- battery
- lower cover
- explosion
- cover
- proof ball
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000000034 method Methods 0.000 title claims abstract description 40
- 238000007789 sealing Methods 0.000 claims abstract description 34
- 239000003792 electrolyte Substances 0.000 claims abstract description 24
- 238000002347 injection Methods 0.000 claims abstract description 18
- 239000007924 injection Substances 0.000 claims abstract description 18
- 239000007788 liquid Substances 0.000 claims abstract description 10
- 239000012530 fluid Substances 0.000 claims description 18
- 238000004026 adhesive bonding Methods 0.000 claims description 7
- 230000004888 barrier function Effects 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 6
- 238000003466 welding Methods 0.000 claims description 6
- 238000005096 rolling process Methods 0.000 claims description 4
- 239000012528 membrane Substances 0.000 claims description 3
- 239000003513 alkali Substances 0.000 abstract description 10
- 230000009194 climbing Effects 0.000 abstract description 4
- 239000003292 glue Substances 0.000 abstract description 4
- 229910000831 Steel Inorganic materials 0.000 abstract 3
- 239000010959 steel Substances 0.000 abstract 3
- 229910018095 Ni-MH Inorganic materials 0.000 description 5
- 229910018477 Ni—MH Inorganic materials 0.000 description 5
- 230000007812 deficiency Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000011109 contamination Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012797 qualification Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- QELJHCBNGDEXLD-UHFFFAOYSA-N nickel zinc Chemical compound [Ni].[Zn] QELJHCBNGDEXLD-UHFFFAOYSA-N 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 231100000241 scar Toxicity 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 210000001364 upper extremity Anatomy 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
-
- 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
-
- 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
Landscapes
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The invention discloses a method for assembling a rechargeable battery. The rechargeable battery comprises a battery core, a steel shell and a battery cover; the battery core comprises an anode, a cathode and a diaphragm, a pole lug is led out from the anode, the battery cover comprises a lower cover, an explosion-proof ball and an upper cap, and the lower cover is provided with a hole. The method comprises the following steps of: 1. shell assembly by coiling: coiling the anode, the cathode and the diaphragm into the battery core and then assembling the battery core into the steel shell; (2) trenching and glue spreading: trenching and spreading glue on the opening of the steel shell; (3) sealing ring arrangement: arranging a sealing ring on the battery core; (4) lower cover connection: fixing the pole lug on the lower bottom surface of the lower cover and connecting the lower cover with the anode; (5) lower cover pressing: pressing the lower cover in the sealing ring; (6) sealing: sealing the lower cover with a sealing machine; (7) liquid injection: injecting electrolyte through the hole in the lower cover; (8) explosion-proof ball arrangement: arranging the explosion-proof ball on the lower cover; (9) upper cap fixing: holding the explosion-proof ball with the upper cap and fixing the upper cap on the lower cover; and (10) standing and forming. The method for assembling the rechargeable battery can be used for greatly reducing alkali climbing phenomenon and improving the percent of pass of products and prolonging the service life of the products.
Description
Technical field
The present invention relates to the assembling of rechargeable battery, particularly relate to a kind of assembly method of rechargeable battery.
Background technology
Rechargeable battery such as Ni-MH battery, nickel-zinc cell etc. enjoy people to favor owing to advantages such as having high-energy-density, high-multiplying power discharge and quick charge, are one of directions of giving priority to of recent two decades.Traditional rechargeable battery assembly method as shown in Figure 1, be: the dress shell of reeling-roll ditch gluing-fluid injection-put sealing ring-put battery cover-spot welding battery cover-pressure battery cover-seal-shelve, change into, this technology also comprises the assembled battery lid, be that battery cover is by lower cover before assembling, the integral body that explosion-proof ball and last cap combine, the fluid injection mode that adopts has centrifugal process, vacuum method and settled process etc., this assembly technology has following deficiency: 1) cause battery to climb alkali easily, have a strong impact on the life-span of battery, and when battery storage, climb alkali, can corrode electrical equipment, bring hidden danger for client and producer.2) electrolyte is contaminated easily, has a strong impact on the composition of electrolyte, causes the internal resistance of cell to increase, and self-discharge rate is accelerated, and has shortened the life-span of battery.3) electric liquid measure is inhomogeneous, and electrolyte easily is thrown out of when injecting uncovered battery, causes electric liquid measure few, and battery capacity can not be given full play to, and internal resistance increases, and reduces battery life.
Summary of the invention
Technical problem to be solved by this invention is: remedy in the prior art battery and climb contaminated easily, the electric liquid measure deficiency of alkali, electrolyte, the uneven shortcoming of battery performance, a kind of assembly method of rechargeable battery is provided.
Technical problem of the present invention is solved by the following technical programs:
Described rechargeable battery comprises battery, box hat and battery cover, described battery comprises positive pole, negative pole and barrier film, and described positive pole leads to lug, and described battery cover comprises lower cover, explosion-proof ball and last cap, cover under described and be provided with the hole, the assembly method of rechargeable battery may further comprise the steps successively:
1) coiling dress shell: in described positive pole, negative pole and the described battery of membrane coil coiled and the described box hat of packing into;
2) roll the ditch gluing: on groove rolling machine, roll ditch and at described box hat mouth gluing;
3) put sealing ring: sealing ring is placed on the described battery;
4) connect lower cover: described lug is fixed on the bottom surface of described lower cover, described lower cover is connected with described positive pole;
5) depress lid: described lower cover is pressed in the described sealing ring;
6) seal: described lower cover is sealed with sealing machine;
7) fluid injection: inject electrolyte by the described hole that covers down;
8) put explosion-proof ball: described explosion-proof ball is placed on covers under described;
9) the fixing cap of going up: will described last cap sleeve residence state explosion-proof ball and be fixed on and cover under described;
10) shelve, change into: the described battery that assembles is shelved, changed into.
Because traditional assembly method is to seal after the first fluid injection, cause electrolyte to splash the inwall of box hat upper end easily, the faucal of battery is by electrolyte contamination, climb alkali when causing the battery later stage to be shelved, electrolyte easily is thrown out of when fluid injection, causes electric liquid measure deficiency, has a strong impact on battery performance; And uncovered being placed in the air of battery sealed for a long time again after fluid injection, and electrolyte is exposed in the air, introduces CO easily
3 2-Deng foreign ion, electrolyte is contaminated easily, and the order of the present invention by changing fluid injection and sealing, adopt the mode of sealing the back fluid injection earlier, prevented that battery from climbing alkali, electrolyte is contaminated and the phenomenon of electric liquid measure deficiency, improve the qualification rate and the battery life of battery product, improved the performance of battery.
Preferably, the aperture that covers the hole of establishing described in the step 5) down is 1-2mm, cooperates needle tubing to inject the electrolyte into battery inside by the fluid injection machine.
Further preferred, explosion-proof ball described in the described step 6) is put into described following covering on the hole of establishing, and makes the center-aligned in the center and the hole of described explosion-proof ball, and explosion-proof ball covers down the hole that covers.
Preferably, the fixed form in described step 4) and the step 9) is spot welding.
Preferably, described fluid injection machine is centrifugal liquid filling machine or vacuum fluid injection machine.
The beneficial effect that the present invention is compared with the prior art is: traditional assembly method is with lower cover before the battery assembling, explosion-proof ball and last cap are combined into integral body and form to be assemblied in as a whole on the battery of having annotated electrolyte behind the battery cover and make battery seal, and battery cover of the present invention is not the combination of finishing the three before assembling, but after earlier lower cover being sealed, annotate again and add electrolyte, add that at last explosion-proof ball and last cap make battery seal, this fit of afterwards injecting electrolyte of sealing earlier, because lower cover and sealing ring and box hat are sealed before notes add electrolyte in advance, so, make between battery cover and the sealing ring, residual without any electrolyte between sealing ring and the box hat, and can shorten electrolyte and be exposed to the airborne time, the faucal that prevents battery is by electrolyte contamination, electrolyte is difficult for being thrown out of when injecting uncovered battery, thereby reduce electric liquid measure deficiency greatly, battery capacity can not give full play to the battery storage process in take place climb the alkali phenomenon, improve battery product qualification rate and battery life, improve the performance of battery.
Description of drawings
Fig. 1 is the assemble flow schematic diagram of traditional rechargeable battery;
Fig. 2 is the assembling decomposing schematic representation of Ni-MH battery in the embodiment of the invention;
Fig. 3 is the assemble flow schematic diagram of Ni-MH battery in the embodiment of the invention.
Embodiment
Contrast accompanying drawing and the present invention is explained in detail below in conjunction with preferred embodiment.
A kind of assembly method of rechargeable battery, described rechargeable battery comprises battery, box hat and battery cover, described battery comprises positive pole, negative pole and barrier film, described positive pole leads to lug, described battery cover comprises lower cover, explosion-proof ball and last cap, cover under described and be provided with the hole, may further comprise the steps successively: the dress shell of 1) reeling: described positive pole, negative pole and the described battery of membrane coil coiled are packed in the described box hat; 2) roll the ditch gluing: on groove rolling machine, roll ditch and at described box hat mouth gluing; 3) put sealing ring: sealing ring is placed on the described battery; 4) connect lower cover: described lug is fixed on the bottom surface of described lower cover, described lower cover is connected with described positive pole; 5) depress lid: described lower cover is pressed in the described sealing ring; 6) seal: described lower cover is sealed with sealing machine; 7) fluid injection: inject electrolyte by the described hole that covers down; 8) put explosion-proof ball: described explosion-proof ball is placed on covers under described; 9) the fixing cap of going up: will described last cap sleeve residence state explosion-proof ball and be fixed on and cover under described; 10) shelve, change into: the described battery that assembles is shelved, changed into.
Specifically, preferred, be example with the AA2000mAh Ni-MH battery, shown in Fig. 2-3, its assembling technology procedure is specific as follows:
1) coiling dress shell: last lower clamp and the cylinder of adjusting up-coiler, make it normal, put barrier film, positive pole and negative pole successively well, put down anchor clamps then and push down positive pole, negative pole and barrier film, reel, with the battery of the winding h51.2 í Φ 14.10(mm that packs into) added in the box hat of bottom spacer.
2) roll the ditch gluing: adjust groove rolling machine, roll ditch, and at box hat mouth automatic glue application.
3) put sealing ring: after the glue for the treatment of the box hat mouth is in leather hard, put into the sealing ring of handling well, sealing ring just must put, and the sealing ring upper limb of putting into is concordant with the box hat faucal, and can not push down the plus plate current-collecting body that positive pole is drawn, i.e. lug.
4) connect lower cover 1: adjust spot welding machine, control suitable heat and welding temperature, the end point of lug is welded on the bottom surface of lower cover 1, lower cover 1 is connected with the positive pole of battery, lug should be welded on a side at lower cover 1 center, and with the position consistency of lug in battery.
5) depress and cover 1: lug is carried out gland after smooth, lug is answered smooth occuping in the middle of the battery, behind the lower cover 1 indentation sealing circle, its upper surface should with the plane parallel at the place, upper edge of sealing ring, and the coiling hole center-aligned of the center in the hole of opening on the lower cover 1 and battery, the distance of the upper edge of sealing ring and box hat mouth should be less than 0.1mm.
6) seal: sealing machine is mixed up, and, seal pressure test, battery is carried out real envelope after waiting to reach requirement with empty box hat examination envelope.The flange of box hat should be even, smooth no scar, and can not directly link to each other with box hat and cause external short circuit, the sealing ring periphery should evenly expose.
7) fluid injection: adjust reservoir quantity before the fluid injection earlier, battery is put into carrier, overlap upper bush and syringe then, the aperture that syringe needle is opened on should vertical corresponding lower cover 1 is the hole of 1-2mm, can not sting barrier film and electrode, put into liquid on the conveyer belt then, and it be centrifugal to put into centrifuge.
8) put explosion-proof ball 2: explosion-proof ball 2 is put on the hole of lower cover 1, the center of explosion-proof ball 2 and the center-aligned in hole make explosion-proof ball 2 cover hole on the lower cover 1.
9) the fixing cap 3 of going up: will go up cap 3 and entangle explosion-proof ball 2 and be pressed on the lower cover 1, and regulate spot welding machine, last cap 3 is spoted weld on the lower cover 1.
10) shelve, change into: partial volume is shelved, changes into, detected to the battery that assembles, finish the making of battery.
At material, change into, under the condition of detection method unanimity, the AA2000mAh Ni-MH battery that present embodiment assembly method (following abbreviation method 1) is made compares test (each 1000pcs) with the AA2000mAh that makes of traditional assembly method (following abbreviation method 2), and the result is as follows:
1) internal resistance contrast (extracting 8pcs)
Method of testing: 1) 1C/0.2C is put to 1.0V; 2) 1C filled 36 minutes, surveyed the internal resistance of cell, data following (unit: m Ω):
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | min | max | avg | |
| Method 1 | 17.2 | 16.0? | 16.6 | 16.5 | 17.8 | 15.7 | 17.3 | 16.1 | 15.7 | 17.8 | 16.7? |
| |
18.0? | 18.9 | 18.5 | 19.0? | 17.8 | 18.8 | 18.9 | 19.1 | 17.8 | 19.1 | 18.6? |
Above data show: the low about 1.9m Ω of internal resistance of the battery of internal resistance ratio method 2 assemblings of the battery of employing method 1 assembling.
2) capacity comparison (extracting 8pcs):
Method of testing: 1) 1C/0.2C is put to 1.0V; 2) 0.2C filled 420 minutes; 3) shelve 30min; 4) 0.2C is put to 1.0V, the record battery capacity, data following (unit: mAh):
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | min | max | avg | |
| Method 1 | 2054 | 2047 | 2052 | 2043 | 2051 | 2045 | 2059 | 2051 | 2043 | 2059 | 2050.3 |
| |
2043.0 | 2039 | 2037 | 2041.0 | 2041 | 2036 | 2037 | 2034 | 2034 | 2043 | 2038.5 |
Above data show: the high about 12.0mAh of capacity of the battery of Capacity Ratio method 2 assemblings of the battery of employing method 1 assembling.
3) life-span contrast:
Method of testing: 1) 1C/0.2C is put to 1.0V; 2) 1C fills 72 minutes-△=5mV; 3) shelve 10min; 4) 1C is put into 1.0V, follows ring worker Walk 2)-4), finishing test to 60% of initial capacity, the result shows, in 320 weeks of battery life that the present embodiment assembly method is made, the battery life of making than traditional assembly method is about high 50 weeks.
4) climb the contrast of alkali ratio
Get the battery of traditional assembly method making and the battery contrast that the present embodiment assembly method is made, normal temperature was shelved 1 year, and the alkali content of climbing of the battery that traditional assembly method is made is 0.1%, and the alkali content of climbing of the battery that the present embodiment assembly method is made is 0.
Above content be in conjunction with concrete preferred implementation to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, make some being equal to substitute or obvious modification, and performance or purposes are identical, all should be considered as belonging to protection scope of the present invention.
Claims (5)
1. the assembly method of a rechargeable battery, described rechargeable battery comprises battery, box hat and battery cover, described battery comprises positive pole, negative pole and barrier film, described positive pole leads to lug, described battery cover comprises lower cover, explosion-proof ball and last cap, cover under described and be provided with the hole, it is characterized in that, may further comprise the steps successively:
1) the dress shell of reeling: described positive pole, negative pole and the described battery of membrane coil coiled are packed in the described box hat;
2) roll the ditch gluing: on groove rolling machine, roll ditch and at described box hat mouth gluing;
3) put sealing ring: sealing ring is placed on the described battery;
4) connect lower cover: described lug is fixed on the bottom surface of described lower cover, described lower cover is connected with described positive pole;
5) depress lid: described lower cover is pressed in the described sealing ring;
6) seal: described lower cover is sealed with sealing machine;
7) fluid injection: inject electrolyte by the described hole that covers down;
8) put explosion-proof ball: described explosion-proof ball is placed on covers under described;
9) the fixing cap of going up: will described last cap sleeve residence state explosion-proof ball and be fixed on and cover under described;
10) shelve, change into: the described battery that assembles is shelved, changed into.
2. the assembly method of rechargeable battery as claimed in claim 1 is characterized in that: the aperture in the hole that covers down described in the step 5) is 1-2mm, cooperates needle tubing to inject the electrolyte into described battery inside by the fluid injection machine.
3. the assembly method of rechargeable battery as claimed in claim 1 or 2 is characterized in that: explosion-proof ball described in the described step 6) is placed on and describedly covers on the hole of establishing down, and makes the center-aligned in the center and the hole of described explosion-proof ball, makes explosion-proof ball cover the hole.
4. the assembly method of rechargeable battery as claimed in claim 1, it is characterized in that: the fixed form in described step 4) and the step 9) is spot welding.
5. the assembly method of rechargeable battery as claimed in claim 2, it is characterized in that: described fluid injection machine is centrifugal liquid filling machine or vacuum fluid injection machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010600527XA CN102064292B (en) | 2010-12-22 | 2010-12-22 | Method for assembling rechargeable battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010600527XA CN102064292B (en) | 2010-12-22 | 2010-12-22 | Method for assembling rechargeable battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102064292A true CN102064292A (en) | 2011-05-18 |
| CN102064292B CN102064292B (en) | 2013-08-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010600527XA Active CN102064292B (en) | 2010-12-22 | 2010-12-22 | Method for assembling rechargeable battery |
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| Country | Link |
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| CN (1) | CN102064292B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102447138A (en) * | 2011-12-14 | 2012-05-09 | 益阳科力远电池有限责任公司 | Assembly method of modified battery |
| CN104882640A (en) * | 2015-05-25 | 2015-09-02 | 江苏华东锂电技术研究院有限公司 | Safe lithium ion battery |
| CN109980265A (en) * | 2019-04-03 | 2019-07-05 | 江苏芯界新能源科技有限公司 | A kind of cylinder battery core assembly technology |
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|---|---|---|---|---|
| CN2437048Y (en) * | 2000-07-09 | 2001-06-27 | 邱善鑫 | Plug type cell |
| CN101340008A (en) * | 2008-08-20 | 2009-01-07 | 江苏赛尔电池有限公司 | Low capacity nickel-hydrogen secondary battery and assembly method |
| CN201383516Y (en) * | 2009-03-24 | 2010-01-13 | 深圳市豪鹏科技有限公司 | Battery positive pole cap |
| CN201562699U (en) * | 2009-09-16 | 2010-08-25 | 比亚迪股份有限公司 | Cover cap of battery and battery thereof |
-
2010
- 2010-12-22 CN CN201010600527XA patent/CN102064292B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2437048Y (en) * | 2000-07-09 | 2001-06-27 | 邱善鑫 | Plug type cell |
| CN101340008A (en) * | 2008-08-20 | 2009-01-07 | 江苏赛尔电池有限公司 | Low capacity nickel-hydrogen secondary battery and assembly method |
| CN201383516Y (en) * | 2009-03-24 | 2010-01-13 | 深圳市豪鹏科技有限公司 | Battery positive pole cap |
| CN201562699U (en) * | 2009-09-16 | 2010-08-25 | 比亚迪股份有限公司 | Cover cap of battery and battery thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102447138A (en) * | 2011-12-14 | 2012-05-09 | 益阳科力远电池有限责任公司 | Assembly method of modified battery |
| CN104882640A (en) * | 2015-05-25 | 2015-09-02 | 江苏华东锂电技术研究院有限公司 | Safe lithium ion battery |
| CN104882640B (en) * | 2015-05-25 | 2017-07-28 | 江苏华东锂电技术研究院有限公司 | Safety lithium ion cell |
| CN109980265A (en) * | 2019-04-03 | 2019-07-05 | 江苏芯界新能源科技有限公司 | A kind of cylinder battery core assembly technology |
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|---|---|
| CN102064292B (en) | 2013-08-14 |
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Denomination of invention: Method for assembling rechargeable battery Effective date of registration: 20160119 Granted publication date: 20130814 Pledgee: Bank of Jiangsu Limited by Share Ltd Shenzhen branch Pledgor: Shenzhen EPT Battery Co., Ltd. Registration number: 2016990000049 |
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Denomination of invention: Method for assembling rechargeable battery Effective date of registration: 20170120 Granted publication date: 20130814 Pledgee: Bank of Jiangsu Limited by Share Ltd Shenzhen branch Pledgor: Shenzhen EPT Battery Co., Ltd. Registration number: 2017440020001 |
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Denomination of invention: Method for assembling rechargeable battery Effective date of registration: 20180126 Granted publication date: 20130814 Pledgee: Bank of Jiangsu Limited by Share Ltd Shenzhen branch Pledgor: Shenzhen EPT Battery Co., Ltd. Registration number: 2018440020008 |
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Date of cancellation: 20190111 Granted publication date: 20130814 Pledgee: Bank of Jiangsu Limited by Share Ltd Shenzhen branch Pledgor: Shenzhen EPT Battery Co., Ltd. Registration number: 2018440020008 |
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Denomination of invention: Method for assembling rechargeable battery Effective date of registration: 20190111 Granted publication date: 20130814 Pledgee: Bank of Jiangsu Limited by Share Ltd Shenzhen branch Pledgor: Shenzhen EPT Battery Co., Ltd. Registration number: 2019440020007 |
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Date of cancellation: 20200414 Granted publication date: 20130814 Pledgee: Bank of Jiangsu Limited by Share Ltd Shenzhen branch Pledgor: SHENZHEN EPT BATTERY Co.,Ltd. Registration number: 2019440020007 |
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