Method and system for achieving automatic switching of multiple electric car battery packs

Abstract

The invention relates to a method and system for achieving automatic switching of multiple electric car battery packs. The method comprises the steps that a control panel unit monitors charging and discharging parameters of the multiple battery packs in real time and judges the working states of the battery packs; if one battery pack is in the charging state, it is determined that the multiple battery packs are in the charging state, and if not, the multiple battery packs are in the discharging state; in the charging state, the battery packs are automatically switched and charged; in the discharging state, the battery packs are automatically switched and discharged. The method and system for achieving automatic switching of the multiple electric car battery packs are simple in structure and reasonable in scheme design; when the multiple battery packs are set, the single battery pack does not need to be designed to be excessively large, the occupied space is reduced, and the control panel unit controls the single cell pack charging and discharging choices by collecting the working state and the battery capacity, the battery temperature and the like of the battery packs, so that it is ensured that the batteries are in the partial charging and discharging state, the safety of the batteries is ensured, and the service life is prolonged.

Description

technical field [0001] The invention belongs to the technical field of battery control, and in particular relates to a method and a system for realizing automatic switching of multiple battery packs of an electric vehicle. Background technique [0002] Electric vehicles are widely used in people's daily life due to their advantages of energy saving, low carbon, labor saving, and quickness. However, the battery pack of electric vehicles is affected by factors such as assembly space, appearance, and cost, and the capacity of the single battery is not large enough. , the problem of insufficient battery life. In the prior art, in order to solve these problems, the method of setting up multiple battery packs is generally adopted. However, in the actual application process, multiple battery packs are not convenient to use directly. Because the battery pack There is a voltage difference between them, and each battery pack has a separate protection circuit. When the battery packs ar...

AI Technical Summary

Problems solved by technology

[0002] Electric vehicles are widely used in people's daily life due to their advantages of energy saving, low carbon, labor saving, and quickness. However, the battery pack of electric vehicles is affected by factors such as assembly space, appearance, and cost, and the capacity of the single battery is not large enough. , the problem of insufficient battery life. In the prior art, in order to solve these problems, the method of setting up multiple battery packs is generally adopted. However, in the actual application process, multiple battery packs are not convenient to use directly. Because the battery pack There is a voltage difference between them, and each battery pack has a separate protection circuit. When the battery packs are directly connected in parallel, due to the voltage difference between the battery packs, it may cause the battery packs to charge each other, thereby degrading the battery performance, or even Damage to the battery pack, and some use manual replacement. Although this will not cause mutual charging between the battery packs, the battery replacement is complicated, and it is not convenient to monitor the battery power and temperature status, and it is impossible to optimize the selection of power. Adequate battery usage, extremely inconvenient

Images