Intelligent equalization method and equalization device for series battery pack
A technology of battery packs in series and equalization method, which is applied in the direction of battery circuit devices, circuit devices, charge equalization circuits, etc., which can solve the problems of large energy consumption and insufficient capacity of single batteries, achieve low energy consumption and improve the overall lifespan , Improve the effect of output capacity
Inactive Publication Date: 2021-07-09
淮北市千锂鸟新能源科技有限公司
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Problems solved by technology
[0006] In order to solve the problem of large energy consumption in the equalization process and the capacity of the single battery can never reach the saturation state, the present invention provides the society with an intelligent equalization method and equalization device for series-connected battery packs with low energy consumption in the equalization process
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[0029] See figure 1 , figure 1 Disclosed is an intelligent equalization method for series-connected battery packs, which is suitable for voltage equalization of at least two single cells connected in series to form a battery pack, and several battery packs connected in series to form a battery pack, including the following steps:
[0030] S1. Turn on the charger to charge the battery pack;
[0031] S2. Detect the voltage of each single battery in the battery pack while charging;
[0032] S3. When the voltage of any single battery in the battery pack reaches a predetermined voltage threshold, select the predetermined voltage threshold from 4.15 volts to 4.35 volts, turn off the electronic switch of the charger, and stop charging;
[0033] S4. Turn on the equalization circuit of the corresponding battery pack of the single battery that has reached the voltage threshold, and discharge the battery pack at a predetermined current, and the predetermined current can be selected bet...
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The invention discloses an intelligent equalization method and equalization device for a series battery pack. The method comprises the following steps of S1, charging a battery pack, S2, detecting the voltage of each single battery in the battery pack while charging, S3, when the voltage of any single battery in the battery pack reaches a preset voltage threshold value, turning off the electronic switch, S4, opening an equalization circuit of the battery pack corresponding to the single battery reaching the voltage threshold, and discharging the battery pack according to a preset current, S5, stopping equalization after the preset discharge time is reached, S6, turning on an electronic switch of the charger, and continuously charging the battery pack, S7, repeating the steps S2-S6 until the voltage values of all the single batteries reach the preset voltage value range, and S8, stopping charging. The method has the advantages of being high in stability and minimum in energy consumption in the equalization process.
Description
technical field [0001] The invention relates to the field of electric energy storage, in particular to an intelligent equalization method and equalization device for a multi-section series battery pack. Background technique [0002] At present, as electric energy storage elements, various batteries have been widely used in electric vehicles, electric energy storage, backup uninterruptible power supply and other fields related to electric energy storage. In the application, in order to meet the voltage platform of each energy storage power system, it is necessary to connect several or even hundreds or thousands of single batteries with only a few volts in series to form the required energy storage power group. Since the performance indicators of the single cells connected in series cannot be completely consistent, there will be problems of overcharging and undercharging at the same time during the charging process of the battery pack, resulting in an unbalanced phenomenon. ...
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Login to View More IPC IPC(8): H02J7/00
CPCH02J7/0019
Inventor 刘进前邱礼泉
Owner 淮北市千锂鸟新能源科技有限公司