Electric vehicle lithium battery management -Lithium - Ion Battery Equipment

Electric vehicle lithium battery management system -Lithium - Ion Battery Equipment

Design of lithium-ion battery management system for electric vehicles

With the shortage of energy, rising oil prices and increasingly serious urban environmental pollution, the development and utilization of new energy to replace oil has attracted more and more attention from governments. In the new energy system, the battery system is an indispensable and important part. In recent years, electric bicycles, hybrid vehicles, electric vehicles and fuel cell vehicles powered by lithium-ion batteries have received increasing attention in the market. The use of power lithium batteries in transportation is of great significance to reduce greenhouse gas emissions, reduce air pollution and use new energy. The advantages of high energy density, high repeated use, light weight, and green environmental protection of lithium-ion batteries have attracted more and more attention, so they have been widely used in mobile phones, notebook computers, power tools, etc. In order to use high power such as electric vehicles and electric vehicles, it is becoming a hot spot for electric vehicles in the world.(Lithium - Ion Battery Equipment)

However, safety issues have become an important limiting factor for commercial promotion due to the abuse of conditions such as heating, overcharging/overdischarging current, vibration, kneading, etc., which can shorten battery life, damage, and even cause fire and explosion. Lithium Ion Battery. Safety specifications for safety type, low cost, long life lithium-ion battery quantity, safety evaluation method, safety and reliable control of battery fabrication process and improvement of battery safety and reliability through anode and cathode materials, electrolyte and gap optimization , to ensure the safety and reliability of high-power lithium-ion batteries, the key to practical applications. The battery center is used as the trading system for battery maintenance and accessories, which not only ensures the safe and reliable use of the battery, but also fully utilizes the battery and prolongs its service life. Regarding the communication bridge between the battery and the system of the vehicle and the driver, the processing system of the electric vehicle battery plays an increasingly important role in performance.

Important Features of the Battery Handling System

Battery system and electric vehicle power lithium battery, battery voltage, current, temperature detection, and leakage detection, heat conduction, battery equalization processing, alarm reminder, calculation of remaining capacity, discharge power, report SOC & SOH conditions, according to battery voltage and current and The temperature also uses the maximum output power algorithm operated by the algorithm to obtain the maximum mileage, and communicates in real time with the on-board master controller, motor control, energy control system, on-board display system, etc. through the CAN bus interface. Figure 1 is a simplified block diagram of a battery handling system.

The basic functions of the battery processing system: 1) Monitor the working state of a single cell, such as the voltage of a single cell, operating current, ambient temperature, etc. 2) Keep the battery, prevent the battery from working under extreme conditions, the battery life is shortened, destroyed, or even attacked by explosion, fire and other damage to personal safety.

Generally speaking, the battery to deal with the system must meet the following circuit maintenance functions: overvoltage and undervoltage maintenance, overcurrent and short circuit maintenance, maintenance at high temperature and low temperature, battery supply multiple maintenance maintenance and processing system progress (high reliability The hardware is maintained for maintenance, and the software performs maintenance with higher flexibility, conducts fault maintenance of key components of the system, and provides users with the third level of maintenance). These functions can meet the needs of most mobile phone batteries, power tools and electric bicycles.

Electric vehicles present higher challenges for battery handling systems

The electric vehicle battery integration system is an open power system, which communicates with the automotive CAN bus, and works together with the vehicle processing system, charger, and motor controller to meet the car's people-oriented safe driving concept. Therefore, the car battery processing system must meet the requirements of TS16949 and car electronics, with complete high-speed data acquisition and high reliability, strong car CAN bus communication capability, strong anti-electromagnetic interference capability (the highest level of EMI/EMC requirements), online diagnosis strong ability.



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