Battery power system

Abstract

The invention discloses a battery power system which is used in a low-speed miniature electric vehicle. The battery power system includes a battery box. The battery box is internally equipped with a battery clamp assembly used for assembling a plurality of ternary lithium batteries into a battery module. A pre-charging unit and a battery management system are arranged on one side of the battery module. The battery management system is equipped with a battery voltage data collection board which is connected with the battery module to collect the voltage and current data of the battery module inthe charging and discharging process in real time. When the collected data is greater than a preset threshold, the battery management system makes the pre-charging unit disconnected from the batterymodule. The battery power system of the invention has the advantages of simple and compact structure, long service life, environmental protection and safety.

Description

technical field [0001] The invention mainly relates to the technical field of lithium battery pack processing, in particular to a battery power system for low-speed miniature electric vehicles. Background technique [0002] With the rapid development of society, people's requirements for transportation tools are becoming more and more diverse. In recent years, while the country is vigorously promoting the development of electric vehicles, a vehicle with a simpler structure, smaller size, and suitable for middle-aged and elderly people is powered by a vehicle-mounted lead-acid battery and completely powered by a rechargeable battery. The car is popular in the market, we usually call this kind of car a pure electric car, also known as a low-speed micro electric car. This low-speed micro electric vehicle is characterized by low speed, no exhaust emissions, and less environmental pollution. However, the power system of existing low-speed micro electric vehicles adopts lead-aci...

AI Technical Summary

Problems solved by technology

[0003] 1. The lead-acid battery has a short lifespan, and the cycle life of the lead-acid battery is 500 to 900 times. Because the sulfuric acid inside the lead-acid battery will corrode the grid, if the lead dioxide falls off, the cycle life of the battery will be affected.

Furthermore, some gas will be released when the lead-acid battery is charged, which will greatly affect the active material of the plate, which will directly lead to the shedding of the active material, and the positive grid alloy will also be severely corroded, thus affecting the overall life of the battery;

[0004] 2. At present, the energy density of lead-acid batteries is as low as 40WH / Kg; taking 72V100A lead-acid batteries as an example, the battery weight is about 220KG, and the battery is quite heavy, which seriously affects the installation and mileage of low-speed micro electric vehicles;

[0005] 3. Due to the use of heavy metals such as lead and cadmium in the production process of lead-acid batteries, if the waste batteries are not properly disposed of, the heavy metals such as lead and cadmium in the battery will cause serious pollution to the soil and groundwater

[0006] 4. At present, the lead-acid batteries on the market do not monitor and protect the monomers, and they are prone to overcharge and overdischarge problems during charging and discharging. Since there is no battery management system inside the battery pack, the current battery capacity cannot be accurately displayed. Problems that cause end customers to stop halfway happen from time to time

[0007] 5. The structure of the power system of the low-speed micro electric vehicles on the market is unreasonable, it is not easy to install and maintain, and it is not easy to dissipate heat

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