Voltage divider of electric vehicle and control method thereof

Abstract

The invention discloses a voltage divider of an electric vehicle. The voltage divider of the electric vehicle comprises a battery pack (4), a charging input module (2), a serial-and-parallel switching output module (6) and a control module (3), wherein the charging input module (2) and the serial-and-parallel switching output module (6) are connected with the battery pack (4), the control module (3) is connected with the battery pack (4), the charging input module (2) and the serial-and-parallel switching output module (6), and a charging input circuit and a discharging output circuit of the battery pack (4) are independent from each other. The invention further provides a control method of the voltage divider of the electric vehicle. According to the voltage divider of the electric vehicle and the control method of the voltage divider of the electric vehicle, the electric shock hazard in the process of riding the electric vehicle and repairing the electric vehicle can be reduced, low-voltage batteries can be used in high-voltage electric vehicles, the service life of the batteries is prolonged, and the trip distance of the electric vehicle is increased.

Description

technical field [0001] The invention relates to the field of electric vehicle battery management systems, in particular to an electric vehicle voltage divider and a control method thereof. Background technique [0002] Although the current battery management system of electric vehicles is relatively complete, the battery management of electric bicycles and electric motorcycles is still blank. Electric vehicles in this article refer to electric motorcycles or electric bicycles. At present, most electric vehicle batteries use a simple series charging and series discharging method. Due to the low cost, the balance of the battery cells is not considered, resulting in a relatively short life of the electric vehicle battery. Often, if one cell is damaged, the entire battery Groups need to be replaced. Moreover, due to the series connection, a relatively high voltage is generated, which has a major hidden danger for the safety of electric vehicle users, especially the safety of b...

AI Technical Summary

Problems solved by technology

Most electric vehicle batteries now use simple series charging and series discharging. Due to the low cost, no balancing of the battery cells is considered, resulting in a relatively short battery life for electric vehicles. Often, if one single cell fails, the entire battery will be damaged. groups need to be replaced

Moreover, due to the series connection, a relatively high voltage is generated, which has a major hidden danger to the safety of electric vehicle users, especially to the safety of battery vehicle maintenance personnel.

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