Expandable power supply quick-change system and method for pure electric vehicles

Abstract

The invention discloses an expandable power supply quick-switching system for a pure electric vehicle. The expandable power supply quick-switching system comprises a first-level main control battery management module, a fixed battery pack second-level main control battery management module, an expanded battery pack second-level main control battery management module, a fixed battery pack third-level slave control battery management module and an expanded battery pack third-level slave control battery management module. The expandable power supply quick-switching system has a huge promotion effect on market oriented development of the pure electric vehicle. In future, the pure electric vehicle is mainly limited by the whole vehicle cost, the charging time and the service life of a power battery. By carrying the expandable power supply quick-switching system, firstly, the whole vehicle cost is lowered significantly, and more selection is provided for a user; secondly, through an expandable battery pack quick-switching technology, the endurance anxiety of a consumer can be eliminated, the charging frequency is reduced, and the service life of the battery is prolonged; and therefore, the expandable power supply quick-switching system has the huge application prospects.

Description

technical field [0001] The invention relates to the technical field of pure electric vehicle power supplies, in particular to an expandable power supply quick-change system and method for pure electric vehicles. Background technique [0002] At present, in order to solve the problem of endurance anxiety, the research and development direction of pure electric vehicles is mainly focused on carrying large-power power batteries. Under a certain energy density, the larger the battery power, the heavier its mass and the larger its volume. Large-capacity batteries not only increase the difficulty of battery layout during vehicle development, but also increase power consumption per 100 kilometers. In addition, the cost of using large-capacity batteries has also increased significantly. [0003] According to statistics, the current market has different demands on the mileage of pure electric vehicles. Although the use of a single high-power battery can meet these mileage demands, ...

AI Technical Summary

Problems solved by technology

Large-capacity batteries not only increase the difficulty of battery layout during vehicle development, but also increase power consumption per 100 kilometers

In addition, the cost of using high-power batteries has also increased significantly

[0003] According to statistical data, the current market has different demands on the mileage of pure electric vehicles. Although the use of a single large-power battery can meet these mileage requirements, it will also greatly increase the travel cost of users and cause travel difficulties.

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