Echelon utilization battery pack control method

Abstract

The invention discloses an echelon utilization battery pack control method, and particularly relates to the field of power battery reutilization, and the method comprises the steps: S1, disassemblinga battery pack of a retired lithium battery, and carrying out the performance evaluation of the voltage, temperature, capacity, power and other electrical data of a lithium cell in the battery pack; and S2, according to the data acquired by the BMS monitoring system, regrouping and assembling the lithium cells with equivalent capacities into a new battery pack according to the capacities, and judging whether the battery pack enters a discharging or charging mode according to the electrical data. According to the method, the capacitor is arranged, discharge process, the capacitor-dischargeablebattery pack improves electric energy, ensures uniform discharge of the battery pack, avoids over discharge of the battery pack and influences on performance of the battery pack, and during charging,capacitor charging, capacitor voltage being equal to that of the battery pack and changes of capacitor voltage can generate absorption or release of the electric energy, so that capacities of the battery packs tend to be consistent, and consistency of the battery packs is improved.

Description

technical field [0001] The present invention relates to the technical field of power battery reuse, and more specifically, the present invention relates to a control method for cascade utilization of battery packs. Background technique [0002] Power batteries decommissioned from electric vehicles usually have a residual capacity of 60-80% of the initial capacity and have a certain service life. At present, there are two feasible processing methods: one is cascade utilization, and the decommissioned power batteries are used in Other fields such as energy storage are used as carriers of electric energy, so as to give full play to the remaining value; the second is dismantling and recycling, where decommissioned batteries are discharged and disassembled, and raw materials are extracted to achieve recycling. [0003] At present, for the battery packs that meet the cascade utilization requirements, the whole pack is directly applied to large-capacity products such as energy stor...

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Problems solved by technology

[0004] In order to overcome the above-mentioned defects of the prior art, the embodiment of the present invention provides a cascade utilization battery pack control method. The problem to be solved by the present invention is: the inconsistency of the battery pack will not be able to fully exert the actual performance of the cascade battery pack, and it is extremely prone to danger

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