A detection and maintenance system for electric vehicle power battery

Abstract

The invention discloses a detecting and maintaining system applied to an electromobile power battery. The detecting and maintaining system comprises a monitoring system, a CAN (Controller Area Network)-to-Ethernet gateway and a battery test maintaining unit, wherein the monitoring system comprises a remote network switch as well as a local network switch, a remote scheduling server, a data access server, a network printer, a monitoring computer, a data server and a firewall; and the battery test maintaining unit comprises battery charging and discharging equipment, a balancing device and a data acquisition system. The detecting and maintaining system has the advantages that the basic electric function detection on a battery pack can be efficiently accomplished, various objective evaluation indexes of the battery pack are provided by reasonably calculating parameters such as the capacity, the internal resistance, the polarization and the consistency of the battery pack and a single battery; the positioning, screening and elimination of abnormal single battery faults of a battery pack to be detected and the balance maintenance on the battery pack to be detected can be effectively carried out; and thus the detecting and maintaining system has strong and wide practical values.

Description

technical field [0001] The invention relates to a detection and maintenance system for a power battery of an electric vehicle, belonging to the technical field of batteries. Background technique [0002] At present, with the development of electric vehicles, power battery technology has also made some progress. Lithium-ion power batteries with higher energy density, smaller volume, and more cycles have become an important power source for electric vehicles preferred by many automakers. However, with the increase of application occasions, it has been found in practice that the output characteristics of power batteries are greatly affected by factors such as ambient temperature and charging and discharging conditions. The performance of the battery pack is degraded in terms of cycle times and output power, which cannot meet the requirements of applications such as electric vehicles and energy storage systems. [0003] In view of the regular inspection and maintenance of power...

AI Technical Summary

Problems solved by technology

The third is the PWM+DC / DC coordinated control technology. At present, the high-power battery test equipment used at home and abroad adopts a two-stage structure, but the two stages are independent of each other and basically have no cooperation. Higher requirements are put forward, so it is necessary to coordinate the overall control of the front and rear according to the output dynamic characteristics; the fourth is the high-efficiency equalization technology of the power battery. Control strategy, however, due to the small equalization capacity of the on-board equalizer, it cannot meet the short-term equalization needs of large-capacity batteries, and cannot cooperate with the detection system to complete the evaluation of the consistency parameters of the single battery and the charge and discharge maintenance of the single battery

The fifth is the software control algorithm software of the battery detection and maintenance system. At present, the software that can complete the battery detection does not have the function of automatic battery maintenance.

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