Electric vehicle battery box charging control device, system and method and electric vehicle

Abstract

The invention discloses an electric vehicle battery box charging control device, system and method and an electric vehicle. The device is characterized in that a first end of a first on-off module is connected with a charger, a second end of the first on-off module is connected with a plurality of battery boxes, and the first on-off module is used for controlling connection or disconnection between the battery boxes and the charger; a second on-off module is connected with the plurality of battery boxes and is used for controlling two battery boxes to be connected in series or disconnected; a battery management master controller is connected with the first on-off module, the second on-off module and the plurality of battery boxes and is used for acquiring battery state data of the plurality of battery boxes and judging whether the battery state data of part of the battery boxes are lower than a preset threshold value or not, if yes, the first part of the battery boxes are controlled to be connected in series and connected into the charger for charging, and the connection between the second part of the battery boxes and the charger is disconnected. According to the invention, the problems of low equalization efficiency and long charging time existing in series charging of a plurality of battery boxes can be solved.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a charging control device, system and method for a battery box of an electric vehicle and an electric vehicle. Background technique [0002] At present, electric explosion-proof trackless rubber-tyred vehicles are gradually being promoted and applied in China's coal mines. According to the requirements of safety standards and regulations, the maximum energy of a single explosion-proof battery box installed on the vehicle is limited to 32kWh. Due to the vehicle's cruising range and power bus voltage platform cannot be too low , so multiple explosion-proof battery boxes will be used in series in the vehicle. During the long-term use in series, the problem of large differences in state of charge will gradually appear between multiple battery boxes, which will lead to the problem that when charging multiple battery boxes in series The equalization efficiency is reduced. For example...

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Problems solved by technology

[0003] The embodiment of the present application provides an electric vehicle battery box charging control device, system, method and electric vehicle, which can solve the balance efficiency of multiple battery boxes connected in series. Problems with low and long charging time

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