A monitoring method and system for electric vehicle battery pack

Abstract

The invention discloses a method for monitoring a battery pack of an electric automobile. The method comprises the following steps: acquiring the temperature and a state-of-charge (SOC) value of the battery pack by a battery management system; judging whether a heat management operation of the battery pack is started or not according to the temperature and the SOC value of the battery pack; and if so, starting the heat management operation of the battery pack, and transmitting the current SOC value of the battery pack to a user terminal through a remote server. According to the method and the system disclosed by the invention, the heat management of the battery pack is realized; the SOC value of the battery pack can be timely acquired by the user terminal; a user can timely acquire the information of the battery pack; and the reliability and the safety of the battery pack are improved.

Description

technical field [0001] The invention relates to the field of electric vehicles, in particular to a method and system for monitoring battery packs of electric vehicles. Background technique [0002] With the continuous reduction of traditional energy sources, energy-saving and environmentally friendly electric vehicles have attracted more and more attention. For electric vehicles, the battery pack is charged through the charger, and the battery pack outputs the driving current, thereby realizing the conversion of electrical energy and mechanical energy. [0003] At present, in the monitoring of the battery pack, the battery management system is mainly used to monitor the charging and discharging process of the battery pack, and the main monitoring object is the voltage signal of the battery cell. At present, the type commonly used in electric vehicles is lithium batteries. Compared with other types of batteries, lithium batteries have relatively high energy density and can p...

AI Technical Summary

Problems solved by technology

At present, the type commonly used in electric vehicles is lithium batteries. Compared with other types of batteries, lithium batteries have relatively high energy density and can provide relatively high discharge power. However, the service life and performance of lithium batteries are extremely sensitive to ambient temperature. Sensitive, over-cold or over-heated external environments will reduce the service life of lithium batteries, especially for electric vehicles that have been left standing for a long time. If they are placed in a cold or hot environment for a long time, the performance of the battery pack will decrease or be damaged, posing a safety hazard. , it may cause injury to the vehicle or personnel when it is used again

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