Electric vehicle battery pack environment detection method

ଲେଖକ: ଆଇଫ୍ଲୋପାୱାର - Leverandør af bærbare kraftværker

On December 13, the "2017 4th my country Power Lithium Battery Conference" held by the Power Lithium Battery Network and the Power Lithium Battery Magazine was held in Dongguan Tangxia Sanzheng Semi-mountain hotel. At this conference, from the power lithium battery industry Companies in various fields, well-known experts, and scholars, etc., the common and in-depth discussions and exchanges in the current hotspots, industry trends, and research and development directions.

Guangdong Li Jiagong Engineer Wang Jiangang Guangdong Lijia Industrial Co., Ltd. takes the "Dynamic Environment Monitoring Method of Innovation Power Lithium Battery", and obtains the second power lithium battery intelligent equipment "Technology Innovation" Award.

At the meeting, Wang Jianang, Guangdong University General Engineer, did a wonderful speech "battery discharge in a certain set temperature under various working conditions". my country's electric vehicle technology has been significantly developed, but the power lithium battery and its group application technology are still the technology bottleneck for electric vehicles. In practical applications, the power demand proposed by the electric vehicle is dynamically changed, the instantaneous large current impact and the instant switching between charge and discharge, which puts forward higher requirements for the dynamic performance of the power lithium battery.

Therefore, it is important for the dynamic working conditions of the national conditions, which is important for the test evaluation method of the dynamic lithium battery. It is also the basis for testing the life of battery dynamic operating conditions. Wang Jiancang system analyzes the specific requirements of the discharge capacity, discharge characteristics, battery consistency, etc.

of the battery pack under five test conditions. First, the vehicle's dynamic test, the speed of the vehicle speed is systematically analyzed at 0-30km, 0-50km, 0-80km, 0-100km and the highest speed speed, and the performance parameters and acceleration time should not be smaller than the electric test vehicle. Design requirements.

The second is the life-threatening dynamic test. In the fully charged state of the power lithium battery, the maximum battery life of the car in a certain driving condition condition is verified. The endless mileage measured by the test vehicle is should not be less than the number of design endless mileage.

Third, the high and low temperature roller test, requires a high temperature environment of 85% relative humidity, temperature 35 ° C or more, and the low temperature environment within -5 ° C ~ -30 ° C, the vehicle's battery life is not less than the normal temperature endless mileage 55%. The fourth is to continuous climbing test, electric vehicles in the climbing process, the power lithium battery group should not have a voltage drop in high or short time to reach the discharge termination voltage, the temperature of the power lithium battery is not exceeded. Fifth, urban road conditions circulation, according to the actual use of electric vehicles in the city to design test links, requiring automobiles to add, reduce, simply travel and parking test.

At the same time, the test of the voltage attenuation rate ηv, temperature rise rate ηt and battery operating voltage difference coefficient ξ (u) in the above five test environments, and related data should also comply with battery design requirements.