Small electric vehicle power management device

Abstract

The invention relates to a power management device of a small electric vehicle. The power management device comprises a liquid crystal display module, a main processor circuit, a second communication interface circuit, a first communication interface circuit, a bottom layer processor circuit, voltage monitoring circuits, current monitoring circuits and a battery pack. The battery pack comprises a plurality of batteries. The number of the voltage monitoring circuits is the same as the number of the batteries. Each voltage monitoring circuit is connected to the positive electrode and the negative electrode of the corresponding battery in a cross mode. The current monitoring circuits are connected to the battery pack in series. The output ends of the voltage monitoring circuits and the output ends of the current monitoring circuits are connected with corresponding input ends of the bottom layer processor circuit. The corresponding output end of the bottom layer processor circuit is further connected with the first communication interface circuit. Both the second communication interface circuit and the liquid crystal display module are connected with the main processor circuit. According to the power management device, the risk that performance of the whole battery pack is lowered is reduced, the service life of the whole battery pack is prolonged, system maintenance cost is reduced, and reliability of the whole vehicle is improved.

Description

technical field [0001] The invention belongs to the technical field of storage battery state monitoring, and in particular relates to a small electric vehicle power management device. Background technique [0002] At present, lead-acid battery packs are widely used for power supply in small electric vehicles. In actual work, due to manufacturing, aging and other factors, in a group of battery packs, individual batteries often have insufficient or low voltage. As a result, the total battery voltage drops, thereby increasing the current of the battery pack, and long-term use will lead to a decrease in the life of the entire battery pack. At present, in small electric vehicles, no measures are taken to detect the voltage of each battery in the battery pack, which often leads to a reduction in the life of the entire battery pack and increases the maintenance cost of the entire vehicle. Contents of the invention [0003] In order to solve the above technical problems, the obje...

AI Technical Summary

Problems solved by technology

[0002] At present, lead-acid battery packs are widely used for power supply in small electric vehicles. In actual work, often due to manufacturing, aging and other factors, in a set of battery packs, individual batteries often have insufficient or low voltage. As a result, the total battery voltage will drop, and the current of the battery pack will increase. Long-term use will lead to a decrease in the life of the entire battery pack.

At present, in small electric vehicles, no measures are taken to detect the voltage of each battery in the battery pack, which often leads to a reduction in the life of the entire battery pack and increases the maintenance cost of the entire vehicle.

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