Waste energy echelon utilization method of power battery for electric vehicle

Abstract

The invention discloses a waste energy echelon utilization method of a power battery for an electric vehicle. The waste energy echelon utilization method of the power battery for the electric vehicle comprises the following steps: firstly, a waste power battery set is disassembled; secondly, performance detection is conducted on battery monomers without damaged appearance to screen out battery monomers capable of being directly used and ensure that a fifth step is accessed, the battery monomers capable of being repaired and reused are screened out, and processed in a third step, and unrepairable battery monomers are processed in a discarded mode; thirdly, the battery monomers capable of being repaired and reused are repaired; fourthly, performance detection is conducted on repaired battery monomers to screen out battery monomers with the difference of nominal voltage and virtual voltage not larger than 0.02V and the virtual capacity not lower than 70% of nominal capacity, the battery monomers with the difference of the nominal voltage and the virtual voltage not larger than 0.02V and the virtual capacity not lower than 70% of the nominal capacity are processed according to the next step, and the repaired battery monomers not capable of reaching the standards are processed in a discarded mode; and fifthly, a new power battery set is assembled. Because waste capacity of a monomer battery of the power battery is reasonably utilized, and is recombined to a new power battery applied to different occasions, the waste energy echelon utilization method of the power battery for the electric vehicle not only satisfies requirements of using occasions, but also utilizes performance of the power batteries.

Description

technical field [0001] The invention relates to a power battery recycling method, in particular to a step-by-step utilization method of residual energy of a power battery for an electric vehicle. Background technique [0002] The power battery refers to the power source that provides the power source for the tool. It has the characteristics of high energy, high power, high discharge rate, wide working temperature range and long service life. Electric vehicles use a power battery pack composed of multiple battery cells, which is composed of hundreds of power batteries with good electrical performance consistency. The power battery determines the performance of the electric vehicle. When the performance of the power battery pack drops to a certain level, in order to ensure the driving and safety needs of the electric vehicle, the power battery should be replaced in time. [0003] The cascade utilization of the remaining energy of the power battery refers to the application fi...

AI Technical Summary

Problems solved by technology

China Electric Power Research Institute's patent application CN201110410608.8 "A Grading Method for Cascade Utilization of Electric Vehicle Power Batteries" proposes a theoretical method for grading power batteries, which can guide the detection of physical and chemical properties of power batteries, but the actual The operation feasibility is relatively low, and it is not easy to realize. Even if the detection is realized, it is easy to cause damage to the battery itself

[0005] At present, the cascade utilization of residual energy of power batteries lacks an effective cascade utilization scheme of residual energy to solve key technical problems such as screening evaluation, repair, pairing and reorganization

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