Lithium battery quick charging and discharging welcome, quick charge battery characteristics is introduced

Source: 2020 - 04 - 10 parts hits: time to welcome the lithium battery fast charge and discharge winding lamination lithium battery is with the internal thin laminated in parallel to increase the battery capacity of the winding battery, would be helpful to reduce the battery internal resistance, and can reduce the battery internal resistance on a wide range. Also have to use the positive matrix, direct contact with the shell on the anode matrix and the shell conductive contact, unreliable, resistance is big, big multiplier large current charging and discharging quantity of heat, pressure drop is big, can not adapt to repeat secondary battery charging and discharging conditions, not adapt to the use of large multiplier large current charge and discharge conditions. With the development of electric power lithium batteries, lithium battery quick charging performance and large current discharge performance more and more get people's attention. Small lithium batteries, the specific energy of 80 ~ 120 wh/kg, more than 1000 power ^ & # 39; 1500 w/kg, if can realize quick charge and large current discharge, 300500 - Cycle life, can replace the purpose of the super capacitor, smaller than only 4 super capacitor energy '5 wh/kg, more than 500' the power of 800 w/kg, supercapacitors than energy, after all is too small, long life and general electric is unnecessary. In the large lithium-ion batteries, specific energy of 100 '180 wh/kg, the power of 15003000 w/kg, if can realize quick charge and large current discharge, 20003000 - Cycle life, can take the place of super capacitor, the purpose of specific energy only six big super capacitor ', more than 1000-8 wh/kg 2000 w/kg, super capacitor specific energy, specific energy, after all, is too small, lithium ion battery is super capacitor '20 times, lithium battery charging capacity is 2000 times that of the super capacitor, super capacitor charging capacity is 40000 times, and lithium battery charging capacity is 38000 times of super capacitor. For general electric, long life is unnecessary. Large than small rate cycle battery safety security: due to the different battery internal structure and the charging and discharging rate, the current distribution on the pole piece is different, after the battery charge and discharge cycle, a large proportion of charging and discharging batteries don't adapt to place will, according to current distribution dense, easy to analyze the safety performance of lithium-ion batteries. Lithium ion battery is embedded in the lithium ion in cathode and realize energy storage and release, rechargeable lithium ion embedded at the cathode, the cathode of lithium ion diffusion rate control steps, when large current charging than lithium ion in cathode electronic speed, but diffusion is not timely, easy lithium analysis, especially in the current distribution populated place.