CN101290974A - Sealing method of battery vacuum and evacuating device - Google Patents
Sealing method of battery vacuum and evacuating device Download PDFInfo
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- CN101290974A CN101290974A CNA2007100740881A CN200710074088A CN101290974A CN 101290974 A CN101290974 A CN 101290974A CN A2007100740881 A CNA2007100740881 A CN A2007100740881A CN 200710074088 A CN200710074088 A CN 200710074088A CN 101290974 A CN101290974 A CN 101290974A
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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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Abstract
The invention discloses a battery vacuuming and sealing method and a vacuum extractor, relating to the battery production process field. The invention discloses a vacuum extractor which comprises a vacuum tube, a drying tube, an intermediate vessel capable of separating gas from liquid, and a needle. The method is as follows: the vacuum extractor is aimed at a liquid injection hole for vacuum extraction; gas, water and electrolyte are extracted into the intermediate vessel; the gas and the water are extracted from the vacuum tube with the electrolyte left in the intermediate vessel; dry air is blown from the drying pipe to get the electrolyte back to a battery; and finally the battery is sealed. The invention guarantees the electrolyte does not leak during the vacuum extraction. The vacuum extraction sealing method and the vacuum extractor of the invention can effectively get rid of harmful gases while guaranteeing the electrolyte in the battery is not extracted out or does not leak so as to influence the volume of electrolyte in the battery during the vacuum extraction, and, to some extent, reduce the thickness of the battery and guarantee the performance of the battery.
Description
[technical field]
The present invention relates to the battery production technology field.
[background technology]
At present, in battery production technology, relate to the problem that to seal or before changing into, to seal after changing into.When changing into, can produce some gases, as HF, CO, CO2, NO etc., cause the battery bulging, seal difficulty simultaneously, had a strong impact on the performance and the rate of finished products of battery.Residue gas cognition causes following influence in its battery:
1, gas exists meeting to increase cell thickness in the battery, and rate of finished products reduces.
2, gas is many in the battery, can discharge more electrolyte when sealing and causes remaining electrolyte content minimizing battery in, finally influences the useful life of battery.
3, the gas of generation can be influential to battery performance.
Among the documents CN200410027395, a kind of battery vacuum method and device thereof are disclosed, its method is: being placed in the spill anchor clamps up of the battery liquid-filling hole after charging is changed into, on liquid injection hole, place slightly larger in diameter in the curved surface occluding body of liquid injection hole, the vertical forcing press depression bar that connects on the curved surface occluding body, with battery and spill anchor clamps and forcing press as for vacuumizing in the vacuum chamber, when the vacuum degree value reaches certain value, start depression bar and push the curved surface occluding body downwards progressively to seal liquid injection hole, remove vacuum state then, take out the battery of vacuum seal.The outstanding advantage of this method is to alleviate battery bulging problem and because the problem that a series of battery performances that the battery bulging is brought descend that causes in the charging process to a great extent.
But because it is described for to vacuumize in vacuum chamber, have such problem: when vacuumizing under so big vacuum environment, gas can be drawn out of, but while electrolyte wherein also can be drawn out of.Battery after changing into, we know, even under normal pressure, the adhesive plaster of sealing liquid injection hole is torn, also have electrolyte and flow out, under the big vacuum environment of negative pressure, this problem is just more obvious, has equaled to reduce the amount of electrolyte in the battery like this, has reduced the capacity of battery.If will guarantee the capacity of battery, then to carry out the operation of an after-teeming electrolyte again, equaling also will increase operation or increase cost, labour.
[summary of the invention]
For solving the problems of the technologies described above, guarantee the vacuum-pumping and sealing method of inside battery electrolyte capacity when the purpose of this invention is to provide a kind of vacuumizing again.
Another object of the present invention provides a kind of vacuum extractor that vacuumizes and can guarantee inside battery electrolyte capacity.
The present invention is achieved by the following scheme:
A kind of battery vacuum-pumping mouth-sealing method, carry out as follows:
A after battery changes into end, aims at the battery liquid-filling hole with vacuum extractor and vacuumizes, and gas, moisture and part electrolyte are drawn out of in the battery;
B, described gas, moisture and part electrolyte are pumped down in the intermediate receptacle of vacuum extractor; Gas, moisture and electrolyte separate in described intermediate receptacle, and gas and moisture are taken away, and electrolyte is stayed in this intermediate receptacle;
C stops to vacuumize, and feeds dry gas, and electrolyte is returned in the battery;
D takes off battery, then liquid injection hole is sealed.
Said method further is improved to, and sealing in the d step is to carry out under dry environment.
Further being improved to of said method, a, b, the c step repeats to carry out several times, and then carries out the d step.
The composition of described dry gas is nitrogen or inert gas.
The moisture of described dry gas is＜20ppm.
Further be improved to, in the step a that vacuumizes, b, the arbitrary step of c, d, with anchor clamps battery pushed, up to sealing end.
A kind of vacuum extractor wherein, comprises intermediate receptacle, the syringe needle, vacuum tube, the drying tube that cooperate with the battery liquid-filling hole, and an end of described intermediate receptacle is connected with syringe needle, and the other end links to each other with drying tube with vacuum tube.
Further be improved to the vacuum valve that is arranged on its switch of control on the vacuum tube, and the dry valve that is arranged on control drying tube switch on the drying tube.
Described vacuum extractor further is improved to intermediate receptacle and the syringe needle connecting place is arranged to step-like.
The inwall of intermediate receptacle is provided with more than one back-up ring.
Further be improved to, described back-up ring tilts to the syringe needle direction.
Preferably, syringe needle is provided with sealing device, and the sealing device makes liquid injection hole and the sealing of syringe needle junction.
The invention has the beneficial effects as follows, adopt vacuum-pumping and sealing method of the present invention and vacuum extractor of the present invention, can effectively realize the removal of pernicious gas, and in vacuum, the battery electrolyte inside can not taken away or be leaked, and does not influence the capacity of battery electrolyte inside.Reduce the thickness of battery to a certain extent, guaranteed the performance of battery.This vacuum extractor is quick, safe, effective, simple in structure and durable and the maintenance assembling is simple and easy.This vacuum-pumping and sealing method is easy to control, work efficiency is high, easy to operate, can be applicable to large-scale production in enormous quantities.
[description of drawings]
The present invention will be further described in detail below by accompanying drawing.
Fig. 1 vacuum schematic diagram of the present invention;
Fig. 2 the present invention adds dry gas process schematic diagram;
The vacuum extractor schematic diagram that adds back-up ring in Fig. 3 intermediate receptacle of the present invention;
Fig. 4 model LP053450AH is vacuum-pumping and sealing A battery average thickness distribution schematic diagram not;
Fig. 5 model LP053450AH vacuum-pumping and sealing B battery average thickness distribution schematic diagram;
1, intermediate receptacle 2, vacuum tube 3, drying tube 4, syringe needle 5, battery 11, back-up ring 21, vacuum valve 31, dry valve
[embodiment]
The present invention will be further described in detail below by embodiment and accompanying drawing.
Embodiment
Battery change into finish after, vacuumize and then seal by adopting vacuum extractor of the present invention.As shown in the figure, vacuum extractor of the present invention comprises following components: intermediate receptacle 1, the syringe needle 4 that cooperates with liquid injection hole, vacuum tube 2, the dry valve 31 that is arranged on vacuum valve 21, the drying tube 3 of its switch of control on the vacuum tube 2 and is arranged on control drying tube 3 switches on the drying tube 3.
The diameter and the length of intermediate receptacle 1 have requirement, the requirement diameter is slightly larger, relative length also will be grown simultaneously, purpose is to make electrolyte can not enter into vacuum tube 2 along the inwall of intermediate receptacle 1, and gas is taken away by vacuum tube 2 roads, liquid retention is in this intermediate receptacle 1, and our design philosophy is that moisture, gas and electrolyte are separated in a word.Intermediate receptacle 1 diameter that this example provides is 20mm, and length is 110mm.
Simultaneously, improved plan is step-like for being arranged in intermediate receptacle 1 and syringe needle 4 junctions, can make electrolyte be difficult to more take away from vacuum tube 2 like this, realizes the purpose of gas-liquid separation of the present invention.
Further preferred mode is for to be provided with several back-up rings 11 on the inwall of intermediate receptacle 1, as three back-up rings 11, back-up ring 11 opening directions are downward, promptly point to the direction of syringe needle, as shown in Figure 3.Even electrolyte is drawn up along the inwall of intermediate receptacle 1 like this, also can be blocked in back-up ring 11 times, can not be taken away and can only be stayed in the intermediate receptacle 1.
The syringe needle 4 that is communicated with in intermediate receptacle 1 lower end is used to connect liquid injection hole on the battery 5, syringe needle 4 has the pipeline that can make gas, liquid communication, pipeline is communicated with liquid injection hole and intermediate receptacle 1 on the battery 5, electrolyte on syringe needle 4, also is provided with sealing device, so that can not leak from syringe needle and liquid injection hole junction when vacuumizing.This sealing device is exactly that the sealing gasket that rubber is made is enclosed within on the syringe needle by tight fit, strain by the sealing pad enters in the through hole of sealing pad the syringe needle extruding and enters in the battery liquid-filling hole again, be battery as seal and with above-mentioned fluid injection syringe needle tight fit, realize the excellent sealing of cell body and fluid injection syringe needle.
With the dry valve 31 that is provided with controllable switch drying tube 3 on the drying tube 3 that intermediate receptacle 1 upper end links to each other, dry valve 31 is opened and can be fed dry gas from drying tube 3.Drying tube 3 links to each other with the dry gas equipment that fills of outside.
Lithium rechargeable battery carries out first time charging, and its charging current scope be≤and 1C, voltage range be≤4.0V.
After charging finishes, as schematic diagram 1, syringe needle 4 is aimed at liquid injection hole on the battery 5, make both tight fit, open vacuum valve 21, gating vacuum tube 2, begin to vacuumize action, gas, moisture and electrolyte are pumped down in the intermediate receptacle 1, and gas such as HF, CO, CO2, NO etc. and moisture are drawn in the vacuum tube 2 then, and electrolyte is retained in the intermediate receptacle 1.Control the time that vacuumizes well, generally take out 1-10 second, preferred 3-5 second, after gas such as HF, CO, CO2, NO etc. and moisture taken away, close vacuum valve.
Open dry valve 31, gating drying tube 3, feed " 0 " pressure drying gas, promptly come release with dry gas, and allow extraction part electrolyte natural back flow in battery, the dry gas that adds can not brought expansion to battery, can be inert gases such as nitrogen or helium, neon, argon, krypton, xenon, radon, in principle can for not with battery in any gas of reacting of material.Electrolyte in the intermediate receptacle turns back in the battery like this.
Simultaneously, for preventing that HF in the battery, CO, CO2, NO from not drained only the step that can repeatedly vacuumize.Such as the vacuum degree size is controlled with the switch gear, when vacuumizing for the first time, adopt highest gear, require vacuum degree to reach or approaching-0.1MPa, the second time and follow-up vacuumizing are adopted little gear, and vacuum degree reaches or approaching-0.06--0.08MPa.
The battery of taking out after the vacuum is taken off; in the atmospheric environment of normal temperature and pressure, with steel ball the shutoff of battery liquid-filling hole is got final product rapidly; to seal be continued operation because be removed to from battery 5; generally can in seconds finish; add to take off in the preceding battery and led to the dry gas protection; again normal pressure in the battery; so in seconds Wai Mian air can not constitute influence to battery; if in the middle of the operation of sealing, can stop the long period; can be on liquid injection hole rubberized fabric or use rubber sealing, seal with steel ball at normal temperatures and pressures then.
Certainly, also can under the dry environment of normal temperature and pressure, seal, can guarantee further that like this moisture can not enter in the battery.
Preferably, can with anchor clamps battery be pushed, guarantee that further gas, moisture are drawn out of in the battery vacuumizing action when carrying out or after finishing.Such as after vacuumizing end, on anchor clamps, push, seal with steel ball then, unclamp anchor clamps again.
Comparative example
At last battery is adopted the mode that vacuumizes and do not vacuumize the mode battery performance and compare.
Get 4000 batteries to be sealed, be equally divided into two groups of A, B, the A group adopts the existing mode that do not vacuumize, and the B group adopts the mode that vacuumizes.Many batches of arrangements respectively are 1000-5000 and are propped up checking on production line simultaneously.Thickness behind leaking liquid amount, cell thickness, capacity, the partial volume is added up in operation under the equivalent environment during this period.
1, the thickness contrast, model is that LP053450AH shipment attitude thickness profile data is followed the tracks of, and follows the tracks of 2000 for every batch, with reference to figure 4, Fig. 5, finds that battery shipment thickness obviously reduces.
2, the contrast of electrolyte residual quantity, model is that LP053450AH vacuumizes and do not vacuumize the contrast of average residual surplus data as following table 1, vacuumizes than weight that does not vacuumize residual quantity and consistency as can be known according to numeral in the table all to increase in battery.
Table 1 LP053450AH vacuumizes and does not vacuumize average residual surplus data
3, capacity comparison
As data in the following table 2, this is a partial volume result, and the needs that do not vacuumize are done the ratio height of secondary partial volume, take out the capacity distributing equilibrium of vacuum.
Table 2 LP053450AH vacuumize and do not vacuumize the capacity comparison data
According to The above results, and other performance tests, find to vacuumize not influence of other performances to battery, test result is all normal.Vacuumizing before the battery seal all has improvement to battery capacity, remaining liquid measure, thickness.Electrolyte mainly is to be evenly distributed on the pole piece in battery, does not have gas on the pole piece, helps charge and discharge cycles.
Claims (12)
1, a kind of battery vacuum-pumping mouth-sealing method is characterized in that:
A after battery changes into end, aims at the battery liquid-filling hole with vacuum extractor and vacuumizes, and gas, moisture and part electrolyte are drawn out of in the battery;
B, described gas, moisture and part electrolyte are pumped down in the intermediate receptacle of vacuum extractor; Gas, moisture and electrolyte separate in described intermediate receptacle, and gas and moisture are taken away, and electrolyte is stayed in this intermediate receptacle;
C stops to vacuumize, and feeds dry gas, and electrolyte is returned in the battery;
D takes off battery, then liquid injection hole is sealed.
2, vacuum-pumping and sealing method according to claim 1 is characterized in that: sealing in the described d step is to carry out under dry environment.
3, vacuum-pumping and sealing method according to claim 1 is characterized in that: a, and b, the c step repeats to carry out several times, and then carries out the d step.
4, vacuum-pumping and sealing method according to claim 1 is characterized in that: the composition of described dry gas is nitrogen or inert gas.
5, vacuum-pumping and sealing method according to claim 1 is characterized in that: the moisture of described dry gas is＜20ppm.
6, vacuum-pumping and sealing method according to claim 1 is characterized in that: in the step a that vacuumizes, b, the arbitrary step of c, d, with anchor clamps battery is pushed, up to sealing end.
7, a kind of vacuum extractor described in claim 1, it is characterized in that: comprise intermediate receptacle, the syringe needle, vacuum tube, the drying tube that cooperate with the battery liquid-filling hole, an end of described intermediate receptacle is connected with syringe needle, and the other end links to each other with drying tube with vacuum tube.
8, vacuum extractor according to claim 7 is characterized in that: also include the vacuum valve that is arranged on its switch of control on the vacuum tube, and the dry valve that is arranged on control drying tube switch on the drying tube.
9, vacuum extractor according to claim 7 is characterized in that: described intermediate receptacle and syringe needle connecting place are arranged to step-like.
10, vacuum extractor according to claim 7 is characterized in that: the inwall of described intermediate receptacle is provided with more than one back-up ring.
11, vacuum extractor according to claim 10 is characterized in that: described back-up ring tilts to the syringe needle direction.
12, vacuum extractor according to claim 7 is characterized in that: syringe needle is provided with sealing device, and the sealing device makes liquid injection hole and the sealing of syringe needle junction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100740881A CN101290974B (en) | 2007-04-18 | 2007-04-18 | Sealing method of battery vacuum and evacuating device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100740881A CN101290974B (en) | 2007-04-18 | 2007-04-18 | Sealing method of battery vacuum and evacuating device |
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| Publication Number | Publication Date |
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| CN101290974A true CN101290974A (en) | 2008-10-22 |
| CN101290974B CN101290974B (en) | 2010-08-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2007100740881A Active CN101290974B (en) | 2007-04-18 | 2007-04-18 | Sealing method of battery vacuum and evacuating device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102290557A (en) * | 2011-07-19 | 2011-12-21 | 深圳邦凯新能源股份有限公司 | Liquid injection process of lithium ion battery cell |
| CN106252728A (en) * | 2015-06-10 | 2016-12-21 | 惠州市豪鹏科技有限公司 | A kind of flexible packaged battery core is bled packaging system |
| CN108666624A (en) * | 2017-03-31 | 2018-10-16 | 深圳市瑞能实业股份有限公司 | Automatic battery chemical component negative pressure system |
| CN109301332A (en) * | 2018-08-15 | 2019-02-01 | 合肥国轩高科动力能源有限公司 | Negative pressure formation device for soft package battery |
| JP2019087371A (en) * | 2017-11-06 | 2019-06-06 | トヨタ自動車株式会社 | Manufacturing method of secondary battery |
| CN110611072A (en) * | 2019-09-27 | 2019-12-24 | 东莞汇洋动力科技有限公司 | Soft package battery and preparation process thereof |
| CN116706279A (en) * | 2022-09-14 | 2023-09-05 | 荣耀终端有限公司 | Preparation method and application of lithium ion battery cell |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2752970Y (en) * | 2004-12-03 | 2006-01-18 | 中国电子科技集团公司第十八研究所 | Large capacity lithium ion battery liquid filling device |
| CN1787275A (en) * | 2005-12-13 | 2006-06-14 | 天津力神电池股份有限公司 | Method for mfg. cylinder type lithium ion secondary battery |
-
2007
- 2007-04-18 CN CN2007100740881A patent/CN101290974B/en active Active
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102290557A (en) * | 2011-07-19 | 2011-12-21 | 深圳邦凯新能源股份有限公司 | Liquid injection process of lithium ion battery cell |
| CN106252728A (en) * | 2015-06-10 | 2016-12-21 | 惠州市豪鹏科技有限公司 | A kind of flexible packaged battery core is bled packaging system |
| CN106252728B (en) * | 2015-06-10 | 2019-05-31 | 惠州市豪鹏科技有限公司 | A kind of flexible packaged battery core pumping packaging system |
| CN108666624A (en) * | 2017-03-31 | 2018-10-16 | 深圳市瑞能实业股份有限公司 | Automatic battery chemical component negative pressure system |
| CN108666624B (en) * | 2017-03-31 | 2024-04-05 | 深圳市瑞能实业股份有限公司 | Automatic formation negative pressure system of battery |
| JP2019087371A (en) * | 2017-11-06 | 2019-06-06 | トヨタ自動車株式会社 | Manufacturing method of secondary battery |
| JP7043793B2 (en) | 2017-11-06 | 2022-03-30 | トヨタ自動車株式会社 | How to manufacture a secondary battery |
| CN109301332A (en) * | 2018-08-15 | 2019-02-01 | 合肥国轩高科动力能源有限公司 | Negative pressure formation device for soft package battery |
| CN110611072A (en) * | 2019-09-27 | 2019-12-24 | 东莞汇洋动力科技有限公司 | Soft package battery and preparation process thereof |
| CN116706279A (en) * | 2022-09-14 | 2023-09-05 | 荣耀终端有限公司 | Preparation method and application of lithium ion battery cell |
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| Publication number | Publication date |
|---|---|
| CN101290974B (en) | 2010-08-25 |
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