The invention provides a lithium battery pack power equalization distribution method and system, and solves the technical problem that parallel circulation is caused by the fact that the existing battery packs are easy to have consistency defects in parallel. The method comprises the steps of performing data acquisition of electro-physical characteristic measurement on single lithium batteries, and screening the single lithium batteries according to the measurement data fitting degree of the electro-physical characteristics; and providing the single lithium battery grouping data according to the screening of the single lithium batteries to form a lithium battery pack with balanced output power. By formulating a specific screening method and a parallel control strategy, the equalization characteristic of charging/discharging power when a plurality of lithium battery packs work in parallel is improved. Meanwhile, a parallel control strategy is formulated, so that the circulating currentimpact during parallel connection of the battery packs is inhibited.
本发明提供了一种锂电池组功率均衡分配方法及系统,解决现有电池组并列易出现一致性缺陷导致并联环流的技术问题。方法包括:对锂电池单体进行电物理特征测量的数据采集,根据所述电物理特征的测量数据拟合度进行所述锂电池单体筛选;根据所述锂电池单体的筛选提供所述锂电池单体分组数据,形成输出功率均衡的锂电池组。通过制定特定的筛选方法及并联控制策略,改善了多个锂电池组并联工作时,充/放电功率的均衡特性。同时,本技术通过制定并联控制策略,抑制了电池组并联时的环流冲击。
Lithium battery pack power equalization distribution method and system
一种锂电池组功率均衡分配方法及系统
2020-09-08
Patent
Electronic Resource
Chinese
IPC: | H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H01M Verfahren oder Mittel, z.B. Batterien, für die direkte Umwandlung von chemischer in elektrische Energie , PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY |
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