CN100553024C - The manufacture method of lithium rechargeable battery - Google Patents
The manufacture method of lithium rechargeable battery Download PDFInfo
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- CN100553024C CN100553024C CNB2005101013387A CN200510101338A CN100553024C CN 100553024 C CN100553024 C CN 100553024C CN B2005101013387 A CNB2005101013387 A CN B2005101013387A CN 200510101338 A CN200510101338 A CN 200510101338A CN 100553024 C CN100553024 C CN 100553024C
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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 present invention relates to a kind of manufacture method of lithium rechargeable battery, comprise nonaqueous electrolytic solution fluid injection for the first time and battery in battery are changed into, it is characterized in that: battery changes into the back battery case is carried out fluid injection second time, and the fluid injection first time is that the 70%-90% of total amount is advisable, and more preferably 80%.It is slow that this battery has capacity attenuation, and the advantage of good cycle is applicable to all kinds of lithium rechargeable batteries.
Description
Technical field
The present invention relates to a kind of manufacture method of lithium rechargeable battery, the electrolyte filling method of nonaqueous electrolytic solution when particularly making lithium rechargeable battery.
Background technology
When lithium rechargeable battery is widely used as the energy of each class of electronic devices, people are also more and more higher to the performance requirement of battery, no matter be circular batteries with higher capacity, the rectangular lithium ion battery of still suitable each electronic product, people are in the consideration to service time and useful life, all require above when having higher initial capacity as energy supply person-battery, also require these batteries in charge and discharge process repeatedly, to have capability retention preferably, show excellent cycle performance, have long useful life.
Because positive electrode generally uses lithium and cobalt oxides in the lithium ion battery, what negative pole used is graphite, and the capacity of these two kinds of materials all has certain limit.Therefore for the raising capacity, each battery production producer method commonly used is exactly the content that as far as possible increases the positive and negative electrode material in battery.In lithium ion battery, lithium ion is inlayed between positive pole and negative pole along with charge and discharge process and is taken off embedding, and its migration between both positive and negative polarity relies on electrolyte to finish, so normal battery charge and discharge must rely on and has an amount of electrolyte to finish between the both positive and negative polarity.Think the increase capacity and the way that increases positive and negative pole material content makes and originally to become more and more crowded with regard to more limited battery space, cause to receive more electrolyte, make battery charging and discharging insufficient, finally cause the capacity of battery sharply to descend, shortened the useful life of battery widely.
In lithium rechargeable battery, the nonaqueous electrolytic solution role is divided into three parts: 1, soak into both positive and negative polarity material (need supposing A); 2, change into required (need supposing B) first for battery; 3, be circulation required (need supposing C).Situation according to electrolyte consumes in lithium rechargeable battery it is contemplated that: the A electrolyte that 1, soaks into the both positive and negative polarity material is to guarantee that initial capacity is normal and circulation is minimum normally; 2, to guarantee carrying out smoothly of battery formation process, the electrolyte of A+B must be arranged in the battery case; 3, along with the carrying out of circulation, the amount of C reduces gradually, when being reduced to 0, begins to consume the electrolyte of infiltration on the both positive and negative polarity material, and promptly the amount of A reduces gradually, and at this moment, the circulation volume decay speeds.So, guarantee that battery circulation volume surplus ratio reaches requirement, must have the electrolyte of A+C in the battery case.
In the common battery manufacture process, fluid injection all is one step completed in battery, and like this, used up electrolyte and fail to be replenished when battery changes into that is to say that this battery electrolyte does not reach maximum capacity requirement.
Summary of the invention
The present invention provides in order to overcome above weak point that the maximization of capacitance under the constant situation of a kind of battery case condition, capacity attenuation are slow, the lithium rechargeable battery of good cycle.
For reaching above purpose, the manufacture method of lithium rechargeable battery of the present invention adopts the secondary injection process to carry out fluid injection, this method comprises nonaqueous electrolytic solution fluid injection for the first time and battery in battery is changed into that it is characterized in that: battery changes into the back battery case is carried out the fluid injection second time.
The electrolyte content of the described fluid injection first time is the 70-90% of its required electrolyte total amount, after battery changes into, and fluid injection to 100% for the second time.
More excellent fluid injection requirement is that the electrolyte content of fluid injection for the first time is 80% of its required electrolyte total amount.
Embodiment
Below in conjunction with embodiment and tabulation the present invention is elaborated.
Lithium rechargeable battery of the present invention is identical with conventional lithium ion two batteries, comprises that pole piece assembly and electrolyte that positive plate, negative plate, barrier film form are accommodated in the battery case jointly, and seals together with cover plate.Wherein the pole piece assembly is around forming by positive and negative plate and membrane coil.
A traditional fluid injection is disposable being injected in the battery case of electrolyte that three parts are required.Certainly will cause the electrolyte total amount not enough as limited space in the shell.And twice fluid injection is that the required electrolyte of three parts is separated fluid injection, and fluid injection for the first time guarantees to soak into the both positive and negative polarity material and changes into required.The abundant Electolyte-absorptive of pole piece this moment consumes part electrolyte when changing into.Change into the back battery and be in the 2.75-3.3V discharge condition, pole piece expands minimum.Utilize when changing into simultaneously and be consumed the space that increases because of electrolyte.Can increase the electrolyte total amount of finally staying in the battery like this.Thereby obtain the lithium rechargeable battery that capacity attenuation is slow, cycle performance is outstanding.
In addition: the ratio that reservoir quantity accounts for total electrolyte content is too low, electrolyte can not soak into positive and negative pole material (A amount too little) or electrolyte fully and soak into positive and negative pole material fully but do not reach and can guarantee to change into the amount (A+B quantity not sufficient) of carrying out required electrolyte smoothly, required electrolyte was not enough when then battery changed into, and caused capacity on the low side; The ratio that reservoir quantity accounts for total electrolyte content is too high, and then the space during the secondary fluid injection is too little, DeGrain.
For lithium rechargeable battery, no matter be square takeup type or stacked, perhaps cylindrical battery adopts this method all can obtain certain effect.
Making and test with square coiled lithium-ion secondary battery is example below, and further the present invention will be described to divide a plurality of embodiment.
Design is also made rectangular cell 043048A of the present invention, and promptly thickness is 4.5mm, and width is 30mm, highly is the square aluminum case lithium ion secondary cell of 48mm.At first determine the relation of battery capacity and required electrolyte total amount, carry out battery then and make.Be designed to 750mah as battery capacity, then the electrolyte total amount is about 2.4g, anode: adopt positive active material LiCoO
2, conductive agent acetylene black, binding agent PVDF evenly mixed in the NMP the inside by weight 100: 5: 5.Be two-sided dressing on the aluminium foil of 20 μ m at thickness, smear evenly.Dry in the baking of vacuum oven the inside, suppress afterwards; Battery cathode: adopt the negative electrode active material Delanium, binding agent PVDF among NMPs evenly mixes according to weight ratio at 100: 9.Be two-sided dressing on the Copper Foil of 12 μ m at thickness, smear evenly.Dry in the baking of vacuum oven the inside, suppress afterwards; Barrier film: the PP/PE/PP material that adopts 20 μ m.According to for the first time, the reservoir quantity ratio difference that accounts for total fluid-injecting amount obtains embodiment 1 to 3 and Comparative Examples 1 and 2 for the second time.
Embodiment 1
Reservoir quantity is 70% for the first time, and changing into the back reservoir quantity second time is 30%.
Embodiment 2
Reservoir quantity is 80% for the first time, and changing into the back reservoir quantity second time is 20%.
Embodiment 3
Reservoir quantity is 90% for the first time, and changing into the back reservoir quantity second time is 10%.
Comparative Examples 1
Reservoir quantity is 60% for the first time, and changing into the back reservoir quantity second time is 40%.
Comparative Examples 2
Reservoir quantity is 100% for the first time, not fluid injection after changing into.
The foregoing description and Comparative Examples battery are done the cycle performance test: with the electric current of 1CmA as continuous charge-discharge test, record when the capacity of battery drop to its initial capacity 80% the time the cycle-index test result of process see Table 1:
Table 1
| Battery examples | Reservoir quantity (%) for the first time | Reservoir quantity (%) for the second time | Battery capacity (mAh) | Cycle-index when battery capacity is initial capacity 80% |
| Embodiment 1 | 70 | 30 | 752 | 409 |
| Embodiment 2 | 80 | 20 | 753 | 418 |
| Embodiment 3 | 90 | 10 | 755 | 403 |
| Comparative Examples 1 | 60 | 40 | 731 | 405 |
| Comparative Examples 2 | 100 | 0 | 752 | 376 |
As can be seen from the above table: battery of the present invention, reservoir quantity is 70～90% of an electrolyte total amount for the first time, battery changes into the back reservoir quantity and reaches 100%, battery capacity all reaches design capacity, and capacity is that 80% o'clock cycle-index of initial capacity is all more than 400 times, its cycle performance is outstanding, and capacity attenuation is slow.Refer again to Comparative Examples 1 and Comparative Examples 2, the cycle-index of its battery capacity or 80% o'clock has certain gap.As seen reservoir quantity is that 70%-90% is more rational execution mode for the first time, more preferably 80% reservoir quantity.
Claims (3)
1, a kind of manufacture method of lithium rechargeable battery comprises nonaqueous electrolytic solution fluid injection for the first time and battery in battery are changed into that it is characterized in that: battery changes into the back to carrying out the fluid injection second time in the battery case.
2, the manufacture method of lithium rechargeable battery according to claim 1 is characterized in that: the electrolyte content of the described fluid injection first time is the 70-90% of its required electrolyte total amount, after battery changes into, and fluid injection to 100% for the second time.
3, the manufacture method of lithium rechargeable battery according to claim 2 is characterized in that: the electrolyte content of fluid injection for the first time is 80% of its required electrolyte total amount.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2005101013387A CN100553024C (en) | 2005-11-10 | 2005-11-10 | The manufacture method of lithium rechargeable battery |
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| CNB2005101013387A CN100553024C (en) | 2005-11-10 | 2005-11-10 | The manufacture method of lithium rechargeable battery |
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| CN1964125A CN1964125A (en) | 2007-05-16 |
| CN100553024C true CN100553024C (en) | 2009-10-21 |
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Families Citing this family (27)
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| CN101315994B (en) * | 2007-05-31 | 2010-06-02 | 上海比亚迪有限公司 | Formation method for lithium ion secondary battery |
| CN101399343B (en) | 2007-09-25 | 2011-06-15 | 比亚迪股份有限公司 | Preparing method of anode active material lithium iron phosphate for lithium ionic secondary cell |
| CN101420048A (en) * | 2007-10-26 | 2009-04-29 | 比亚迪股份有限公司 | Preparation of lithium ionic secondary cell |
| CN101494305B (en) | 2008-01-25 | 2011-05-18 | 比亚迪股份有限公司 | Lithium ion battery electrolyte and battery and battery set containing the same |
| US8088305B2 (en) | 2008-02-22 | 2012-01-03 | Byd Company Limited | Lithium iron phosphate cathode material |
| US8062559B2 (en) | 2008-02-29 | 2011-11-22 | Byd Company Limited | Composite compound with mixed crystalline structure |
| US8062560B2 (en) | 2008-02-29 | 2011-11-22 | Byd Company Limited | Composite compound with mixed crystalline structure |
| US8052897B2 (en) | 2008-02-29 | 2011-11-08 | Byd Company Limited | Composite compound with mixed crystalline structure |
| US8057711B2 (en) | 2008-02-29 | 2011-11-15 | Byd Company Limited | Composite compound with mixed crystalline structure |
| US8148015B2 (en) | 2008-03-21 | 2012-04-03 | Byd Company Limited | Cathode materials for lithium batteries |
| CN101597089A (en) | 2008-06-06 | 2009-12-09 | 比亚迪股份有限公司 | The preparation method of a kind of transition metal hydroxide and oxide compound thereof and positive electrode material |
| CN101640288B (en) | 2008-07-30 | 2012-03-07 | 比亚迪股份有限公司 | Lithium-ion battery electrolyte and lithium-ion battery containing same |
| CN101783425A (en) * | 2009-01-15 | 2010-07-21 | 深圳市比克电池有限公司 | Method for pre-charging lithium ion batteries |
| CN101783426A (en) * | 2009-01-15 | 2010-07-21 | 深圳市比克电池有限公司 | Pre-charging method of lithium ion battery with cobalt acid lithium as positive active material |
| WO2010081422A1 (en) * | 2009-01-15 | 2010-07-22 | 深圳市比克电池有限公司 | Pre-charging method for lithium-ion battery |
| CN101783424A (en) * | 2009-01-15 | 2010-07-21 | 深圳市比克电池有限公司 | Method for pre-charging lithium ion battery |
| CN102201563B (en) * | 2010-03-24 | 2016-02-10 | 深圳市比克电池有限公司 | Injection method of lithium ion battery electrolyte and the battery prepared |
| CN102255105B (en) * | 2011-06-10 | 2016-03-02 | 东莞新能源科技有限公司 | The lithium ion battery of secondary fluid injection |
| US9559350B2 (en) * | 2011-11-24 | 2017-01-31 | Toyota Jidosha Kabushiki Kaisha | Method for producing nonaqueous electrolyte secondary battery |
| CN104319115A (en) * | 2014-07-16 | 2015-01-28 | 惠州市鸣曦科技有限公司 | Method for pre-burying of negative electrode of hybrid super capacitor |
| CN106469829A (en) * | 2015-08-20 | 2017-03-01 | 郑州比克电池有限公司 | Lithium ion battery forming and capacity dividing method |
| CN107845767B (en) * | 2017-10-10 | 2020-11-06 | 合肥国轩高科动力能源有限公司 | Method for improving cycle performance of cycle battery by injecting liquid again during cycle |
| CN109256592B (en) * | 2018-09-06 | 2020-05-29 | 星恒电源(滁州)有限公司 | Formation process of lithium ion battery |
| CN108808144B (en) * | 2018-09-06 | 2020-09-04 | 江西迪比科股份有限公司 | Formation process of flexible package lithium ion battery |
| CN109524614A (en) * | 2018-11-14 | 2019-03-26 | 湖南安德丰新能源科技有限公司 | A kind of secondary electrolyte filling method in lithium battery preparation |
| CN111785910B (en) * | 2020-08-11 | 2022-10-21 | 天津市捷威动力工业有限公司 | Method for determining lithium ion battery liquid injection amount |
| CN113629365B (en) * | 2021-08-24 | 2023-05-23 | 蜂巢能源科技有限公司 | Electrolyte injection method and lithium ion battery |
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| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Shenzhen BYD Lithium Battery Co., Ltd. Assignor: Biyadi Co., Ltd. Contract fulfillment period: 2008.4.25 to 2012.11.19 contract change Contract record no.: 2008440000071 Denomination of invention: Method for producing lithium ion secondary cell License type: Exclusive license Record date: 2008.5.13 |
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Free format text: EXCLUSIVE LICENCE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.4.25 TO 2012.11.19 Name of requester: SHENZHEN BYD LITHIUM BATTERY CO., LTD. Effective date: 20080513 |
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Assignee: Shenzhen BYD Lithium Battery Co., Ltd. Assignor: Biyadi Co., Ltd. Contract fulfillment period: 2008.11.12 to 2014.4.30 contract change Contract record no.: 2008440000368 Denomination of invention: Method for producing lithium ion secondary cell License type: Exclusive license Record date: 20081113 |
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Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.11.12 TO 2014.4.30; CHANGE OF CONTRACT Name of requester: SHENZHEN CITY BIYADILI BATTERY CO., LTD. Effective date: 20081113 |
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