CN101188322A - A repair method for self-discharging unqualified battery - Google Patents
A repair method for self-discharging unqualified battery Download PDFInfo
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- CN101188322A CN101188322A CNA2007101347118A CN200710134711A CN101188322A CN 101188322 A CN101188322 A CN 101188322A CN A2007101347118 A CNA2007101347118 A CN A2007101347118A CN 200710134711 A CN200710134711 A CN 200710134711A CN 101188322 A CN101188322 A CN 101188322A
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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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/84—Recycling of batteries or fuel cells
Abstract
The invention discloses a method to repair self-discharge and unqualified batteries. An instantaneous and intermittent repeated charging and discharging method is adopted for the self-discharge and unqualified batteries to melt down burrs and dendrites which can bring the augmentation of self-discharge inside the battery and generate marginal discharge. The burrs and the dendrites are arranged at the surface of an electrode or inside a septum. Because a great deal of electrolyte is reserved inside the electrode and the septum, the melting of the burrs and the dendrites can not bring the further perforation of the septum which can increase the self-discharge of the battery, so the charge retention ability and the reserving performance of the battery can be improved. The self-discharge and unqualified batteries in the production can be repaired and processed through the method of the invention, and the qualified rate of renewed detection can reach over 80 percent.
Description
Technical field
The present invention relates to the method that the defective battery of a kind of self discharge is repaired.
Background technology
In the battery production process, especially adopt than batteries such as the MH-Ni, the Cd-Ni that approach pole plate, Zn-Ni, small burr can appear in places such as the edge of electrode, angle inevitably, these burrs penetrate barrier film easily, cause the micro-short circuit of battery, thereby add the self discharge of macrocell, influence the normal use of battery.In the battery storage process, because phenomenons such as the dissolving of electrode material, deposition form dendrite at electrode surface, as Cd dendrite, Co dendrite, Zn dendrite etc., these dendrite penetrate barrier film, can cause that equally the self discharge of battery increases, and shelf characteric reduces.
A lot of about the method pertinent literature introduction that reduces self-discharge of battery, as " power technology " periodical 1995,19 (6), the 1-3 page or leaf, Zhou Zhigang, Liu Xue economizes, and in " electrolyte is formed the influence to the MH-Ni battery performance " literary composition that Wei Qi first-class is delivered, discloses and adds additive reduce self-discharge of battery in electrolyte; In " influencing the factor of MH/Ni anode discharge capacity " literary composition that " battery " periodical 2004,34 (1), 64-66 page or leaf, Wang Dianlong, Liu Ying, Dai Changsong etc. are delivered, disclose the employing polyalkene diaphragm and reduced self-discharge of battery; Chinese patent application CN1227975 has introduced the La content in the hydrogen-storage alloy has been controlled, and reduces self-discharge of battery, and U.S. Pat 005645953A has introduced and used H
2Or H
2Replace air in the Ni/MH battery with the mixed gas of Ar gas, nitrogen, reduce the self discharge of battery etc.But these all are measures of taking in production process, reduce the self discharge of battery.
After battery was made, self discharge detected defective, influences normal use, said method can't carry out repair process, how these batteries this handle, and its self discharge or retention of charge are met the demands, and also do not have relevant document or patent introduction.
Summary of the invention
The invention provides the method that the defective battery of a kind of self discharge is repaired, after battery completes and detects, handle, the underproof battery of self discharge can be repaired by this method.
Technical scheme of the present invention is as follows: a kind of method that the defective battery of self discharge is repaired, by adopting the defective battery of big electric current temporary impact, to cause that burr, dendrite that self-discharge of battery increases melt away, eliminate the battery short circuit inducement, to improve the retention of charge of battery, reduce the self discharge of battery.
The big electric current temporary impact of the present invention mode comprises impacts the instantaneous charging of the big electric current of battery, instantaneous discharge or the instantaneous intersection that discharges and recharges.Described temporary impact is control like this: at 1～60s, the total capacity that impacts charge or discharge is no more than 5% of battery rated capacity.Described temporary impact electric current is between 5C～40C, and C is the rated capacity of battery.Described temporary impact electric current is in electrode current density, at 100～800mA/cm
2Between.Described temporary impact adopts bump or batch (-type) to impact.
The present invention adopts the method instantaneous, that batch (-type) repeatedly discharges and recharges by self discharge being detected underproof battery, and inside battery is caused that self discharge increases, and the burr of generation point discharge, dendrite etc. melt away.These burrs, dendrite are in electrode surface or barrier film inside, because electrode and barrier film internal storage have considerable electrolyte, add the self discharge of macrocell so the fusing of burr, dendrite can not cause the further perforation of barrier film, thereby improve the retention of charge and the shelf characteric of battery.By the method, the underproof battery of self discharge in producing is carried out repair process, detect qualification rate again and reach more than 80%.
Embodiment
A kind of method that the defective battery of self discharge is repaired of the present invention, by adopting the defective battery of big electric current temporary impact, will cause that burr, dendrite that self-discharge of battery increases melt away, and eliminate the battery short circuit inducement, to improve the retention of charge of battery, reduce the self discharge of battery.Described temporary impact is control like this: at 1～60s, the total capacity that impacts charge or discharge is no more than 5% of battery rated capacity.The temporary impact electric current should be controlled between 5C～40C, and C is the rated capacity of battery.If the temporary impact electric current is in electrode current density, at 100～800mA/cm
2Between.Big electric current temporary impact mode comprises impacts the instantaneous charging of the big electric current of battery, instantaneous discharge or the instantaneous intersection that discharges and recharges.Temporary impact adopts bump or batch (-type) to impact.
For most of batteries, be difficult to bear the trickle charge under the especially big electric current, under this condition, cause hot, the interior voltage rise height of battery easily, make battery phenomenons such as leakage, gas leakage occur, even blast can occur.So, must control total large current charge amount, and adopt the repeatedly method of batch (-type) temporary impact, the promptly instantaneous charging several seconds, the rest several seconds, to impact again, circulation is for several times.By have a rest to eliminate or reduce heavy current impact, avoid the battery heating or reveal in the polarization phenomena that inside battery produces.Total impact charging capacity suggestion is no more than 5% of rated capacity.
Battery with square MH-Ni23Ah (rated capacity) is that example is elaborated below.
Embodiment one:
Optional 10 aborning the underproof battery of self discharge detect.
Be under 0 the situation, to battery charge 120%, to shelve 1h at charging state, discharge into final voltage 1.0V with 0.2C, the actual capacity of counting cell with the 0.2C electric current.
To battery charge 120%, the battery open circuit is shelved 7d under the normal temperature state, with the 0.2C electric current battery discharge is arrived final voltage 1.0V with the 0.2C electric current.The discharge capacity of counting cell and self-discharge rate.The results are shown in Table 1.
Be under 0 the situation, to adopt the 180A electric current to carry out impact experiment at charging state to 10 batteries, the impact system is charging 2s, and rest 5s circulates 5 times continuously.Impact the back to battery with the 0.2C current discharge to final voltage 1.0V.Then with the 0.2C electric current to battery charge 120%, battery open circuit is shelved 7d under the normal temperature state, with the 0.2C electric current to battery discharge to final voltage 1.0V.The discharge capacity of counting cell and self-discharge rate the results are shown in Table 1.
Battery capacity and charged maintenance Performance Detection before table 1 impacts
| Numbering | 1 | ?2 | ?3 | ?4 | ?5 | ?6 | ?7 | ?8 | ?9 | ?10 |
| Battery capacity Ah | ?23.9 | ?23.9 | ?23.9 | ?23.9 | ?23.9 | ?23.9 | ?24.6 | ?23.9 | ?23.9 | ?23.9 |
| Shelve capacity Ah behind the 7d before the impact | ?8 | ?10.7 | ?12.0 | ?18.7 | ?8 | ?13.3 | ?8.67 | ?10.7 | ?18.7 | ?8 |
| Charged conservation rate % before impacting | ?33.5 | ?44.8 | ?50.2 | ?78.2 | ?33.5 | ?55.6 | ?35.2 | ?44.8 | ?78.2 | ?33.5 |
| Shelve 7d capacity Ah after the impact | ?19.6 | ?20.1 | ?19.6 | ?22.3 | ?20.8 | ?20.5 | ?20.5 | ?19.9 | ?21.8 | ?19.7 |
| Impact the charged conservation rate % in back | ?82 | ?84.1 | ?82 | ?93.3 | ?87 | ?85.8 | ?83.3 | ?83.3 | ?91.2 | ?82.4 |
Through above big electric current intermittent charge shock treatment, self discharge detect underproof battery charge conservation rate bring up to by original average 48.8% average 85.4%, impact the back self-discharge of battery detect all qualified.
Embodiment two:
The underproof battery of self discharge in the production lot battery is carried out shock treatment by above-mentioned system.Handle the back battery and detect again, it is qualified that the self-discharge of battery more than 80% detects.The still underproof battery of part self discharge is carried out dissection and analysis.Main cause is that inside battery has bigger short circuit source, and the hole that burns is perhaps obviously arranged on the barrier film, can't repair.
Adopt the battery after this method is repaired, detect every performance index and all satisfy standard-required, the battery production qualification rate is improved, and the battery cost reduces relatively.
Because batteries such as MH-Ni, Cd-Ni, Zn-Ni all adopt thin pole plate, phenomenons such as burr can appear in the battery production process inevitably, in the long term storage process, also there are phenomenons such as Co dendrite, Cd dendrite, Zn dendrite respectively, so above method all is suitable for this class battery.
Owing to the purpose that adopts this method is to adopt heavy current impact to make burr or dendrite produce point discharge to melt away, so, the method of using heavy-current discharge impact, charging impact or charging, discharge intersection to impact all can, but when using discharge impact, the necessary higher electric weight of lotus, otherwise heavy-current discharge impacts damage battery easily.
Claims (6)
1. method that the defective battery of self discharge is repaired, by adopting the defective battery of big electric current temporary impact, will cause that burr, dendrite that self-discharge of battery increases melt away, and eliminate the battery short circuit inducement, to improve the retention of charge of battery, reduce the self discharge of battery.
2. the method that the defective battery of self discharge is repaired according to claim 1, it is characterized in that big electric current temporary impact mode comprise to the instantaneous charging of the big electric current of battery, instantaneous discharge or instantaneous discharge and recharge to intersect impact.
3. the method that the defective battery of self discharge is repaired according to claim 1, it is characterized in that described temporary impact is control like this: at 1～60s, the total capacity that impacts charge or discharge is no more than 5% of battery rated capacity.
4. the method that the defective battery of self discharge is repaired according to claim 1 is characterized in that described temporary impact electric current between 5C～40C, and C is the rated capacity of battery.
5. the method that the defective battery of self discharge is repaired according to claim 1 is characterized in that described temporary impact electric current is in electrode current density, at 100～800mA/cm
2Between.
6. the method that the defective battery of self discharge is repaired according to claim 1 is characterized in that described temporary impact adopts bump or batch (-type) to impact.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2007101347118A CN101188322A (en) | 2007-10-15 | 2007-10-15 | A repair method for self-discharging unqualified battery |
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| CNA2007101347118A CN101188322A (en) | 2007-10-15 | 2007-10-15 | A repair method for self-discharging unqualified battery |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104466281A (en) * | 2014-11-17 | 2015-03-25 | 国网河南省电力公司南阳供电公司 | Special charging method for transformer substation storage battery |
| US20150171398A1 (en) * | 2013-11-18 | 2015-06-18 | California Institute Of Technology | Electrochemical separators with inserted conductive layers |
| CN105811031A (en) * | 2016-05-13 | 2016-07-27 | 合肥国轩高科动力能源有限公司 | Repairing method for battery with slightly-damaged diaphragm |
| CN107706473A (en) * | 2017-10-16 | 2018-02-16 | 郑州云海信息技术有限公司 | A kind of BBU capacity restorative procedure, device, equipment and storage medium |
| CN108336437A (en) * | 2017-12-21 | 2018-07-27 | 维沃移动通信有限公司 | A kind of battery check device, method and mobile terminal |
| CN110943262A (en) * | 2019-12-04 | 2020-03-31 | 东莞市振华新能源科技有限公司 | Method for improving self-discharge of battery cell |
| US10693117B2 (en) | 2011-07-11 | 2020-06-23 | California Institute Of Technology | Electrochemical systems with ionically conductive and electronically insulating separator |
| US10714724B2 (en) | 2013-11-18 | 2020-07-14 | California Institute Of Technology | Membranes for electrochemical cells |
| CN114388746A (en) * | 2020-10-21 | 2022-04-22 | 安徽盟维新能源科技有限公司 | Lithium metal negative electrode, lithium metal battery, preparation method of lithium metal negative electrode and lithium metal battery and method for inhibiting lithium dendrite |
-
2007
- 2007-10-15 CN CNA2007101347118A patent/CN101188322A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10693117B2 (en) | 2011-07-11 | 2020-06-23 | California Institute Of Technology | Electrochemical systems with ionically conductive and electronically insulating separator |
| US11527802B2 (en) | 2011-07-11 | 2022-12-13 | California Institute Of Technology | Electrochemical systems with ionically conductive and electronically insulating separator |
| US20150171398A1 (en) * | 2013-11-18 | 2015-06-18 | California Institute Of Technology | Electrochemical separators with inserted conductive layers |
| US10714724B2 (en) | 2013-11-18 | 2020-07-14 | California Institute Of Technology | Membranes for electrochemical cells |
| CN104466281A (en) * | 2014-11-17 | 2015-03-25 | 国网河南省电力公司南阳供电公司 | Special charging method for transformer substation storage battery |
| CN105811031A (en) * | 2016-05-13 | 2016-07-27 | 合肥国轩高科动力能源有限公司 | Repairing method for battery with slightly-damaged diaphragm |
| CN107706473A (en) * | 2017-10-16 | 2018-02-16 | 郑州云海信息技术有限公司 | A kind of BBU capacity restorative procedure, device, equipment and storage medium |
| CN108336437A (en) * | 2017-12-21 | 2018-07-27 | 维沃移动通信有限公司 | A kind of battery check device, method and mobile terminal |
| CN110943262A (en) * | 2019-12-04 | 2020-03-31 | 东莞市振华新能源科技有限公司 | Method for improving self-discharge of battery cell |
| CN110943262B (en) * | 2019-12-04 | 2021-07-02 | 东莞市振华新能源科技有限公司 | Method for improving self-discharge of battery cell |
| CN114388746A (en) * | 2020-10-21 | 2022-04-22 | 安徽盟维新能源科技有限公司 | Lithium metal negative electrode, lithium metal battery, preparation method of lithium metal negative electrode and lithium metal battery and method for inhibiting lithium dendrite |
| CN114388746B (en) * | 2020-10-21 | 2024-01-23 | 安徽盟维新能源科技有限公司 | Lithium metal negative electrode, lithium metal battery, preparation method of lithium metal negative electrode and lithium dendrite inhibition method |
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Open date: 20080528 |