The requirements for power batteries in new energy vehicles mainly include the following points:
1. Performance requirements: Charging and discharging performance: Power batteries need to have good charging and discharging capabilities, including high-power charging and discharging capabilities and high charging and discharging efficiency, to ensure the range and power performance of electric vehicles. Quality to power ratio and volume to power ratio are key indicators for measuring the rapid charging and discharging ability of a battery. Cycle life: The cycle life of power batteries should be long, able to maintain high performance stability after multiple charge and discharge cycles, and reduce performance degradation caused by battery aging. Energy density: High energy density is an important development direction for power batteries, which directly affects the range of electric vehicles. At present, the energy density of lithium batteries used in electric vehicles is generally in the range of 100 to 150Wh/kg.
2. Safety requirements: Environmental adaptability: The battery must operate normally within a wide temperature range and maintain stable performance in high humidity environments. Safety regulations: Power batteries should comply with relevant safety standards, such as GB/T 18384.1, to ensure safe operation under various conditions. Protective measures: The battery pack should have sufficient protection level to prevent the intrusion of dust and moisture. At the same time, the battery system should have functions such as high-voltage power-off protection, overcurrent protection, and over temperature protection to cope with abnormal situations.
3. Other requirements: Easy to use and maintain: The power battery should be easy to install, disassemble, and maintain, making it convenient for car owners and maintenance personnel to operate. Cost: The cost of power batteries should be minimized as much as possible to enhance the market competitiveness of new energy vehicles. This involves multiple aspects such as the new technological content, materials, manufacturing methods, and production scale of batteries. Environmental friendliness: Power batteries should meet the requirement of no environmental pollution and minimize their impact on the environment during production, use, and recycling.
The requirements for power batteries in new energy vehicles are multifaceted, including performance, safety, ease of use and maintenance, cost, and environmental friendliness. These requirements collectively drive the continuous development and progress of power battery technology.