CN102290557A - Liquid injection process of lithium ion battery cell - Google Patents
Liquid injection process of lithium ion battery cell Download PDFInfo
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- CN102290557A CN102290557A CN2011102024628A CN201110202462A CN102290557A CN 102290557 A CN102290557 A CN 102290557A CN 2011102024628 A CN2011102024628 A CN 2011102024628A CN 201110202462 A CN201110202462 A CN 201110202462A CN 102290557 A CN102290557 A CN 102290557A
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- battery cell
- liquid injection
- lithium ion
- ion battery
- electric core
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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
Abstract
The embodiment of the invention provides a liquid injection process of a lithium ion battery cell. The process provided by the invention comprises the following steps: a primary liquid injection step: while filling an electrolyte into the lithium ion battery cell, presetting the weight percentage of the injected electrolyte; a formation step: precharging the battery cell subjected to primary liquid injection; and a secondary liquid injection step: extruding the formed battery cell until the thickness of the formed battery cell reaches a preset thickness and injecting a corresponding amount of electrolyte according to the extrusion degree. According to the liquid injection process of the lithium ion battery cell provided by the embodiment of the invention, the battery cell with well regulated thickness is extruded and then the corresponding amount of electrolyte is injected according to the extrusion degree, great electrolyte loss in the liquid injection process of the lithium ion battery cell can be avoided, the material cost is lowered, and the performance of the battery cell is enhanced.
Description
Technical field
The present invention relates to the lithium ion battery field, relate in particular to a kind of liquid injection process of lithium ion battery cell.
Background technology
Lithium ion battery has the advantage of high voltage, height ratio capacity and high-specific-power, important new forms of energy have been become, be widely used on mobile phone, notebook computer, digital camera, video camera, portable DVD player, panel computer and the various power tool, market requires also more and more higher to the capacity and the circulation of battery, but in limited lithium ion battery cell space, how to inject electrolyte as much as possible, become the bottleneck of production firm.
In the industry lithium ion battery used respectively at present and change into back secondary fluid injection and guarantee reservoir quantity, and then the capacity and the cycle performance of guarantee battery, but this liquid injection process be after the secondary fluid injection again to the electrolyte extruding sealing, can cause a large amount of losses of electrolyte, electric core performance reduces.
Summary of the invention
Embodiment of the invention technical problem to be solved is, a kind of liquid injection process of lithium ion battery cell is provided, to reach the reduction Material Cost, the purpose of the electrolyte loss of electricity in-core when avoiding the secondary fluid injection.
In order to solve the problems of the technologies described above, the embodiment of the invention has proposed a kind of liquid injection process of lithium ion battery cell, comprising: a fluid injection step: lithium ion battery cell injects the ratio that preestablishes of electrolyte total weight when fluid injection; Change into step: the described electric core after the fluid injection is carried out precharge; Secondary fluid injection step: the thickness that pushes the described electric core after described the changing into is to preset thickness and inject the electrolyte of respective amount according to the extruding degree.
The beneficial effect of the embodiment of the invention is: by inject the liquid injection process of lithium ion battery cell of the electrolyte of respective amount behind the good electric core thickness of squeeze adjustments again according to the extruding degree, the a large amount of losses of electrolyte in the liquid injection process of lithium ion battery cell have been avoided, reduce Material Cost, promoted electric core performance.
Description of drawings
Fig. 1 is the entire flow schematic diagram of the liquid injection process of embodiment of the invention lithium ion battery cell.
Fig. 2 is the main flow schematic diagram of the liquid injection process of embodiment of the invention lithium ion battery cell.
Embodiment
Below in conjunction with accompanying drawing, the embodiment of the invention is elaborated.
Please refer to Fig. 1 ~ Fig. 2, the liquid injection process of embodiment of the invention lithium ion battery cell comprises:
A fluid injection step 10: lithium ion battery cell injects the ratio that preestablishes of electrolyte total weight when fluid injection.For a described fluid injection step 10, the electrolyte total weight is the predetermined weight that can satisfy the required electrolyte of electric core performance, and electric core performance comprises cycle performance, capacity etc., and the described ratio that preestablishes is 50% ~ 90%.In the first embodiment of the invention, the electrolyte of injection is 50% of predefined electrolyte total weight; In the second embodiment of the invention, the electrolyte of injection is 60% of predefined electrolyte total weight; In the third embodiment of the invention, the electrolyte of injection is 70% of predefined electrolyte total weight; In the fourth embodiment of the invention, the electrolyte of injection is 80% of predefined electrolyte total weight; In the fifth embodiment of the invention, the electrolyte of injection is 90% of predefined electrolyte total weight; Different injection ratios has first satisfied the needs of different situations, as the needs of the product of different model, material.
A sealing step 20: rubberizing paper or plug gum cover are blocked liquid injection port.
An aging step 30: in humidity is 1% ~ 8%, and temperature is that the described electric core after will once sealing under 15 ℃ ~ 30 ℃ the condition was placed 5 h ~ 20 hours.Sealing step that after this step, also comprises with respect to prior art, promptly adding bag paper handkerchief or cotton on original gummed paper or the gum cover in follow-up formation process, to absorb the electrolyte of emerging, technical scheme of the present invention because of the electrolyte of can not emerging again so can omit this step, further reduced using and having simplified technological process of material.
Change into step 40: the described electric core after the fluid injection is carried out precharge.The described step 40 that changes into comprises:
A precharge substep 41: charge condition is 0.02C ~ 0.1C, to charge 1 h ~ 3 hours of described electric core; A described precharge has activated described electric core.
Secondary precharge substep 43: charge condition is 0.1C ~ 0.5C, to charge 2 h ~ 5 hours of described electric core; Described secondary precharge is to charge activating on the basis of described electric core, thus steadily carrying out smoothly of having guaranteed to change into.
Kaifeng step 50: remove gummed paper or the gum cover of blocking liquid injection port, to prepare the secondary fluid injection.
Voltage tester step 60: according to the predeterminated voltage value, whether the voltage of the described electric core after the test precharge is normal; In the present embodiment, described predeterminated voltage value is 3.6V ~ 4.1V, and this step purpose is in order to detect non-defective unit, to eliminate defective products, guaranteeing carrying out smoothly of subsequent handling.
Secondary fluid injection step 70: the thickness of extruding voltage tester normal described electric core injects the electrolyte of respective amount to preset thickness and according to the extruding degree, also promptly injects the electrolyte of respective amount according to the space of extruding.Wherein, adopting electric core thickness to improve anchor clamps in the described secondary fluid injection step 70 comes the thickness of the described electric core of squeeze adjustments to described preset thickness; The aluminum hull supplied materials thickness that described preset thickness value is described electric core is to the numerical value between the standard thickness of finished product electricity core.
Particularly, during the aluminum hull supplied materials of common described electric core, thickness is than 0.2 millimeter ~ 0.4 millimeter of the thin thickness of the electric core of finished product, in changing into step 40, the pole piece of electric core correspondence expands, and aluminum hull thickness is thickened, in secondary fluid injection process, the thickness squeeze adjustments between the standard thickness of aluminum hull supplied materials thickness and finished product electricity core, is regulated reservoir quantity according to the thickness of electric core, thus ensure the reservoir quantity of fluid injection for the first time and for the second time the summation of reservoir quantity meet design requirement.
With respect to the technology of carrying out the secondary fluid injection after the changing into of prior art, electric core is placed under certain humidity and temperature or is not placed after the secondary fluid injection, if humidity and time control are bad, can cause the electrolyte suction, influence thickness, the capacity of battery, cycle performance and voltage; After fluid injection, in the process of extruding, can cause electrolyte to overflow the equal loss equally, the volatilization of electrolyte simultaneously has certain influence to environment; The effect of carrying out the secondary fluid injection behind the good electric core thickness of the described squeeze adjustments of the embodiment of the invention again is: ensure that secondary fluid injection step is injected electrolyte content and electric core thickness reaches a reasonable balance, thereby when ensureing thickness, ensure liquid measure again, after having ensured that promptly electric core seals, the weight of electrolyte in electric core, thus make the circulation of electric core reach requirement.
Secondary aging step 80: in humidity is 1% ~ 8%, and temperature is under 15 ℃ ~ 30 ℃ the condition the described electric core after the secondary fluid injection to be placed 0 h ~ 10 hours.
Secondary sealing step 90: to the described electric core compressed steel pearl after the secondary ageing to block liquid injection port.
By checking repeatedly to the liquid injection process of the lithium ion battery cell of the embodiment of the invention, use this liquid injection process, can reach following requirement: 1. reduce the electrolyte loss that changes into and seal in the process; 2. fail safe: avoid battery potential safety hazard to occur in the secondary fluid injection, the anchor clamps corrosion short circuit that causes charging of the electrolyte corrosion charging anchor clamps of promptly having avoided emerging, the electrolyte of having avoided emerging causes the blast of electric core; 3. control guarantor's liquid measure by squeeze adjustments thickness, simultaneously, also can ensure thickness according to actual conditions; 4. under same working condition, can promote the capacity of lithium ion battery product, and then promote cycle performance of battery; 5. improve and seal environment, do not have electrolyte to emerge to avoid because that electrolyte causes is allergic etc.
The above is the specific embodiment of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also are considered as protection scope of the present invention.
Claims (10)
1. the liquid injection process of a lithium-ion electric core is characterized in that, comprising:
A fluid injection step: lithium ion battery cell injects the ratio that preestablishes of electrolyte total weight when fluid injection;
Change into step: the described electric core after the fluid injection is carried out precharge;
Secondary fluid injection step: the thickness that pushes the described electric core after described the changing into is to preset thickness and inject the electrolyte of respective amount according to the extruding degree.
2. the liquid injection process of lithium ion battery cell as claimed in claim 1 is characterized in that, a described fluid injection step and changing between the step also comprises:
A sealing step: rubberizing paper or plug gum cover are blocked liquid injection port;
An aging step: in humidity is 1% ~ 8%, and temperature is that the described electric core after will once sealing under 15 ℃ ~ 30 ℃ the condition was placed 5 h ~ 20 hours.
3. the liquid injection process of lithium ion battery cell as claimed in claim 1 is characterized in that, the described step that changes into comprises:
A precharge substep: charge condition is 0.02C ~ 0.1C, to charge 1 h ~ 3 hours of described electric core;
Secondary precharge substep: charge condition is 0.1C ~ 0.5C, to charge 2 h ~ 5 hours of described electric core.
4. the liquid injection process of lithium ion battery cell as claimed in claim 2 is characterized in that, described changing between step and the described secondary fluid injection also comprises:
Kaifeng step: remove gummed paper or the gum cover of blocking liquid injection port;
The voltage tester step: according to the predeterminated voltage value, whether the voltage of the described electric core after the test precharge is normal.
5. the liquid injection process of lithium ion battery cell as claimed in claim 4 is characterized in that, described predeterminated voltage value is 3.6V ~ 4.1V.
6. the liquid injection process of lithium ion battery cell as claimed in claim 1 is characterized in that, also comprises after the described secondary fluid injection step:
The secondary aging step: is 1% ~ 8% with the described electric core of the maintenance squeezed state after the secondary fluid injection in humidity, and temperature is to place 0 h ~ 10 hours under 15 ℃ ~ 30 ℃ the condition;
The secondary sealing step: to the described electric core compressed steel pearl after the secondary ageing to block liquid injection port.
7. the liquid injection process of lithium ion battery cell as claimed in claim 1 is characterized in that, the described ratio that preestablishes is 50% ~ 90%.
8. the liquid injection process of lithium ion battery cell as claimed in claim 7 is characterized in that, the described ratio that preestablishes is 50%, 60%, 70%, 80% or 90%.
9. the liquid injection process of lithium ion battery cell as claimed in claim 1 is characterized in that, described secondary fluid injection step adopts electric core thickness to improve anchor clamps to come the thickness of the described electric core of squeeze adjustments to preset thickness.
10. as the liquid injection process of each described lithium ion battery cell in the claim 1 to 9, it is characterized in that described preset thickness value is that the aluminum hull supplied materials thickness of corresponding described electric core is to the numerical value between the standard thickness of finished product electricity core.
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| CN2011102024628A CN102290557A (en) | 2011-07-19 | 2011-07-19 | Liquid injection process of lithium ion battery cell |
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| CN2011102024628A CN102290557A (en) | 2011-07-19 | 2011-07-19 | Liquid injection process of lithium ion battery cell |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102646809A (en) * | 2012-04-23 | 2012-08-22 | 宁德新能源科技有限公司 | Filling and activating method for flexible-packaging lithium ion battery |
| CN104037448A (en) * | 2014-06-13 | 2014-09-10 | 广东亿纬赛恩斯新能源系统有限公司 | Battery |
| CN107026255A (en) * | 2017-05-18 | 2017-08-08 | 惠州市惠德瑞锂电科技股份有限公司 | A kind of rotating disk automatic filling machine assembly |
| CN107359305A (en) * | 2017-07-12 | 2017-11-17 | 珠海格力电器股份有限公司 | Lithium ion battery process equipment |
| CN107464956A (en) * | 2017-08-17 | 2017-12-12 | 云南锡业集团（控股）有限责任公司 | A kind of new process for making of lithium ion battery |
| CN107910491A (en) * | 2017-11-23 | 2018-04-13 | 惠州市华维机电设备有限公司 | A kind of method for improving lithium-ion battery electrolytes fluid injection efficiency |
| CN107978725A (en) * | 2017-11-23 | 2018-05-01 | 惠州市华维机电设备有限公司 | A kind of method for solving lithium-ion battery electrolytes fluid injection hardly possible |
| CN108091940A (en) * | 2016-11-21 | 2018-05-29 | 惠州市元大电子科技有限公司 | A kind of manufacture craft of lithium ion aluminum-shell battery |
| CN109216643A (en) * | 2018-09-08 | 2019-01-15 | 江西安驰新能源科技有限公司 | A kind of efficient priming device of power battery |
| CN109742451A (en) * | 2019-01-23 | 2019-05-10 | 深圳新恒业电池科技有限公司 | The electrolyte filling method of column lithium ion battery |
| CN109755657A (en) * | 2019-01-23 | 2019-05-14 | 深圳新恒业电池科技有限公司 | The electrolyte filling method of column lithium ion battery |
| CN110579569A (en) * | 2019-09-12 | 2019-12-17 | 东莞维科电池有限公司 | Method for calculating electrolyte retention in battery |
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| CN101290974A (en) * | 2007-04-18 | 2008-10-22 | 比亚迪股份有限公司 | Sealing method of battery vacuum and evacuating device |
| CN101399328A (en) * | 2007-09-28 | 2009-04-01 | 深圳市比克电池有限公司 | Liquid injection process for core of lithium ionic cell |
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2011
- 2011-07-19 CN CN2011102024628A patent/CN102290557A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101290974A (en) * | 2007-04-18 | 2008-10-22 | 比亚迪股份有限公司 | Sealing method of battery vacuum and evacuating device |
| CN101399328A (en) * | 2007-09-28 | 2009-04-01 | 深圳市比克电池有限公司 | Liquid injection process for core of lithium ionic cell |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102646809B (en) * | 2012-04-23 | 2014-07-30 | 宁德新能源科技有限公司 | Filling and activating method for flexible-packaging lithium ion battery |
| CN102646809A (en) * | 2012-04-23 | 2012-08-22 | 宁德新能源科技有限公司 | Filling and activating method for flexible-packaging lithium ion battery |
| CN104037448A (en) * | 2014-06-13 | 2014-09-10 | 广东亿纬赛恩斯新能源系统有限公司 | Battery |
| CN108091940A (en) * | 2016-11-21 | 2018-05-29 | 惠州市元大电子科技有限公司 | A kind of manufacture craft of lithium ion aluminum-shell battery |
| CN107026255A (en) * | 2017-05-18 | 2017-08-08 | 惠州市惠德瑞锂电科技股份有限公司 | A kind of rotating disk automatic filling machine assembly |
| CN107359305A (en) * | 2017-07-12 | 2017-11-17 | 珠海格力电器股份有限公司 | Lithium ion battery process equipment |
| CN107464956A (en) * | 2017-08-17 | 2017-12-12 | 云南锡业集团（控股）有限责任公司 | A kind of new process for making of lithium ion battery |
| CN107910491A (en) * | 2017-11-23 | 2018-04-13 | 惠州市华维机电设备有限公司 | A kind of method for improving lithium-ion battery electrolytes fluid injection efficiency |
| CN107978725A (en) * | 2017-11-23 | 2018-05-01 | 惠州市华维机电设备有限公司 | A kind of method for solving lithium-ion battery electrolytes fluid injection hardly possible |
| CN109216643A (en) * | 2018-09-08 | 2019-01-15 | 江西安驰新能源科技有限公司 | A kind of efficient priming device of power battery |
| CN109216643B (en) * | 2018-09-08 | 2023-12-22 | 江西安驰新能源科技有限公司 | High-efficient priming device of power battery |
| CN109742451A (en) * | 2019-01-23 | 2019-05-10 | 深圳新恒业电池科技有限公司 | The electrolyte filling method of column lithium ion battery |
| CN109755657A (en) * | 2019-01-23 | 2019-05-14 | 深圳新恒业电池科技有限公司 | The electrolyte filling method of column lithium ion battery |
| CN110579569A (en) * | 2019-09-12 | 2019-12-17 | 东莞维科电池有限公司 | Method for calculating electrolyte retention in battery |
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Application publication date: 20111221 |