Modular energy storage device based on retired batteries and cascade utilization heterogeneous method of device

Abstract

The invention discloses a modular energy storage device based on retired batteries and a cascade utilization heterogeneous method of the device. In the cascade utilization process of the retired powerstorage batteries, the invention provides data support for reasonable utilization of the retired power storage batteries of electric vehicles according to operation effect analysis, and formulates astrategy for coping with retiring tide of a large number of power batteries in the future. Considering performance imbalance of different retired batteries, in order to better utilize the retired batteries, the invention realizes the purpose of seamless connection between a battery pack and a whole energy storage system through a bridge, original BMS resources are fully utilized, waste of the original resources is reduced, the battery pack does not need to be disassembled, time, labor and money are saved, and emission of industrial solid waste is reduced. The method meets the national policy-oriented requirements on harmlessness, reduction, resource utilization and comprehensive utilization of industrial solid wastes, and completely utilizes the original BMS of the battery, so that the purpose of direct echelon utilization without disassembling the battery pack can be achieved without disassembling the battery.

Description

Technical field [0001] The present invention relates to echelon utilization battery heterogeneous technology, and specifically relates to a modular energy storage device based on decommissioned batteries and its echelon utilization heterogeneous method. Background technique [0002] As the new energy vehicle market continues to develop and expand, new energy vehicles have entered a period of explosive growth. The demand and production capacity of supporting power batteries have increased year by year. The issue of cascade utilization and scrap disposal of retired batteries has also begun to attract industry attention. With the rapid development of new energy vehicles, the power lithium batteries used with them generally have a service life of about 20 years, but their performance will decay after 3-5 years of use. Once the battery capacity decays below 80% of the initial capacity, electric vehicles will The cruising range will be significantly reduced. Therefore, power batt...

AI Technical Summary

Problems solved by technology

Due to the fact that most of the decommissioned power lithium batteries on the market have different specifications, and the battery models are complicated and diverse, it is difficult to scale up the recycling of a single type of battery, which increases the recycling cost.

In addition, problems such as the lack of consistency in residual value assessment and the establishment of a symbiotic and win-win industrial chain ecosystem have also affected the development of the power battery recycling industry.

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