A kind of old dynamic lithium battery improves the charging method of internal resistance consistencyTechnical field
The invention belongs to old dynamic lithium battery echelons to utilize field, improve internal resistance more particularly to a kind of old dynamic lithium batteryThe charging method of consistency.
Background technique
The different types of internal resistance of cell is different.The battery of same type, due to inconsistent, the internal resistance of internal chemical characteristicIt is different.Old dynamic lithium battery internal electricity or many in fact, only internal resistance is excessive, consistency is poor cannot sufficiently release electricityCome.Internal resistance consistency is improved for old lithium pond at present, few effective methods lead to old dynamic lithium battery utilization rate veryIt is low.
Summary of the invention
Present invention purpose is the problem of cannot reducing the internal resistance of cell in the prior art of solution, and provides one kindOld dynamic lithium battery improves the charging method of internal resistance consistency.
In order to realize that present invention purpose, the application use following technical scheme:
Old dynamic lithium battery of the invention improves the charging method of internal resistance consistency, in which: executes according to the following steps:
(1) chemical conversion treatment is carried out to lithium battery:
(a) electricity of old dynamic lithium battery monomer is all given out light, until not putting not Chu Lai；
(b) it in the state that continuous current state is 0.1A~0.5A, charges to above-mentioned battery, until voltage reaches4.2V or more, and capacity stablize be not further added by until, then the electricity of above-mentioned battery is all given out light again, until not putting not come outUntil；
(2) partial volume is carried out to lithium battery with grading system:
(c) in the state that constant current is 3.0A~6.0A, first time charging is carried out to above-mentioned battery, until first fillsUntil the blanking voltage of electricity is 3.5V~4.0V, it is then allowed to stand 30min；
(d) in the state that constant current is 3.0A~6.5A, second is carried out to above-mentioned battery and is charged, until second fillsUntil the blanking voltage of electricity is 3.9V~4.2V, it is then allowed to stand 30min；
(e) in the state that constant current is 0.1A~0.5A, third time charging is carried out to above-mentioned battery, until third is filledUntil the blanking voltage of electricity is 4.1V~4.5V.
Old dynamic lithium battery of the invention improves the charging method of internal resistance consistency, in which: the charging of first chargingElectric current is 4.5A；
Old dynamic lithium battery of the invention reduces the partial volume method of internal resistance, in which: the charging current of second charging is5.5A。
Old dynamic lithium battery of the invention improves the charging method of internal resistance consistency, in which: the cut-off of first chargingThe blanking voltage of voltage, the blanking voltage of the second charging and third charging is stepped up.
Old dynamic lithium battery of the invention improves the charging method of internal resistance consistency, in which: the step (a) and step(b) electricity of old dynamic lithium battery monomer is all given out light and refers to that discharge current is less than 0.1A.
The beneficial effects of the present invention are: present invention process is simple, the partial volume time is shortened, while not influencing partial volume batteryPerformance reduces the internal resistance of old dynamic lithium battery, improves old dynamic lithium battery consistency, to improve old dynamic lithium batteryUtilization rate and the market competitiveness.
Specific embodiment
Below with reference to embodiment, the invention will be further described:
Old dynamic lithium battery of the invention improves the charging method of internal resistance consistency, executes according to the following steps:
(1) chemical conversion treatment is carried out to lithium battery:
(a) electricity of old dynamic lithium battery monomer is all given out light, until not putting not Chu Lai；
(b) it in the state that continuous current state is 0.1A~0.5A, charges to above-mentioned battery, until voltage reaches4.2V or more, and capacity stablize be not further added by until, then the electricity of above-mentioned battery is all given out light again, until not putting not come outUntil；Electricity, which is all given out light, refers to that discharge current is less than 0.1A.
(2) partial volume is carried out to lithium battery with grading system:
(c) in the state that constant current is 3.0A~6.0A, such as electric current is 4.5A, is carried out for the first time to above-mentioned batteryCharging, until the blanking voltage of the first charging is 3.5V~4.0V, such as blanking voltage is 3.6A, is then allowed to stand 30min；
(d) in the state that constant current is 3.0A~6.5A, such as electric current is 5.5A, is carried out second to above-mentioned batteryCharging, until the blanking voltage of the second charging is 3.9V~4.2V, such as blanking voltage is 4.0A, is then allowed to stand 30min；
(e) in the state that constant current is 0.1A~0.5A, such as electric current is 0.4A, carries out third time to above-mentioned batteryCharging, until the blanking voltage of third charging is 4.1V~4.5V, such as blanking voltage is 4.3A.
Detection.
The preferred embodiment of the present invention has been described in detail above.It should be appreciated that those skilled in the art withoutIt needs creative work according to the present invention can conceive and makes many modifications and variations.Therefore, all technologies in the artPersonnel are available by logical analysis, reasoning, or a limited experiment on the basis of existing technology under this invention's ideaTechnical solution, all should be within the scope of protection determined by the claims.