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公开(公告)号：US12113179B2
公开(公告)日：2024-10-08
申请号：US17312409
申请日：2020-07-22
Inventor： YueJiu Zheng , Hang Wu , Wei Yi , Long Zhou , Xin Lai
IPC: H01M10/42 , B07C5/344 , G01R31/382
CPC classification number: H01M10/4221 , B07C5/344 , G01R31/382 , H01M10/42
Abstract: The present invention provides a method for sorting lithium cells, which includes quick sorting and high-precision sorting. The method provided by the present invention can be used for quickly and accurately classifying cells based on self-discharge, and is applicable to large-scale self-discharge sorting due to low cost of adopted equipment. Through the quick sorting method and the high-precision sorting method in the present invention, cells with large self-discharge rates can be eliminated from a batch of cells, cells with similar self-discharge rates can be sorted into groups, and an application range is wider.
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公开(公告)号：US12046724B2
公开(公告)日：2024-07-23
申请号：US17284446
申请日：2020-05-09
Inventor： Yuejiu Zheng , Zheng Meng , Yong Zhou , Xin Lai , Long Zhou , Anqi Shen , Wenkuan Zhu , Yunfeng Huang , Haidong Liu
CPC classification number: H01M10/44 , H01M10/48 , H02J7/00302 , H02J7/00306 , H02J7/00716 , H02J7/007182
Abstract: The present invention provides a method for reasonably adjusting an end-of-discharge voltage of a lithium battery with attenuation of a battery life. The method includes: acquiring an end-of-charge voltage, an end-of-discharge voltage and a rated capacity based on a basic parameter table for a lithium battery, then setting a safety end-of-charge voltage and a safety end-of-discharge voltage to obtain an initial safety discharge capacity, and finally setting a preset discharge capacity of the battery; using an Ampere-hour integration method to estimate a discharged power, taking the preset discharge capacity as a discharge standard, and stopping discharge when the discharged power reaches the preset discharge capacity; and the safety discharge capacity being gradually less than the preset discharge capacity within a battery life cycle, and the battery stopping discharge when the voltage reaches the safety end-of-discharge voltage. By controlling the discharge capacity to be unchanged, the present invention ensures stably outputting power in the case that the battery capacity attenuates, so that a user feels that the endurance mileage of an electric vehicle is stably unchanged within a certain period. The method has the characteristics of simple adjusting control method and convenience in commercialization.
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3.发明授权公开(公告)号：US11498453B2
公开(公告)日：2022-11-15
申请号：US17299796
申请日：2020-07-03
Inventor： Yuejiu Zheng , Wei Yi , Hang Wu , Long Zhou
IPC: H02J7/00 , B60L58/13 , H01M10/058
Abstract: The invention provides an equalizing device for a vehicle soft-packed battery and an equalizing method for the soft-packed battery. According to the equalizing method for the vehicle soft-packed battery, a battery to be equalized is connected to a parallel equalization circuit by using an equalizing device for a vehicle soft-packed battery, battery cells to be equalized are sequentially equalized by adopting a first-in first-out sequence, and the SOC of each cell equalized is maintained within a preset range; and the number of the cells entering the equalizing device for the vehicle soft-packed battery is N, and the equalizing time of the battery cells is T. The equalizing device for the vehicle soft-packed battery comprises a holder clamping type or a copper sheet compressing type. On the premise of remarkably improving the equalizing efficiency of the battery cell, the invention can reduce the space and cost required by the equalizing operation, and ensure that the SOC difference of the equalized battery cell is maintained within a certain range, and it is a low-cost high-efficiency battery cell equalizing device. The invention is suitable for equalizing a large number of battery cells on a production line.
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