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The Importance of Lithium-ion Battery Thermal Performance
2022-03-10
Lithium-ion batteries generate a certain amount of heat during charging and discharging. Especially during high current charging and discharging, lithium-ion batteries generate a lot of heat inside. Due to the difference in the structure of lithium-ion batteries, the thermal conductivity in the direction parallel to the poles is significantly higher than that perpendicular to the poles.
Heat dissipation in lithium-ion battery electric vehicles has been one of the key technologies in the industry. Lithium-ion batteries are related to traditional lead-acid batteries, nickel-cadmium batteries and nickel-metal hydride batteries, which have higher energy density and higher charge/discharge rates, and therefore generate serious heat during operation. Especially in the field of power lithium batteries, the road conditions are complex, the environment is harsh (especially high temperature summer), the battery heating more intense, which has more demanding requirements for the capacity, life and especially the safety performance of lithium-ion batteries. To some extent, the safety of lithium-ion batteries is its thermal dissipation problem - once the lithium-ion battery thermal yield is greater than the cooling rate, the battery pack will heat up, when the heat exceeds the temperature of the battery pack can withstand a critical point, it is very easy to lead to safety accidents, so the heat dissipation problem of lithium-ion power battery pack is very Important.
Heat dissipation in lithium-ion battery electric vehicles has been one of the key technologies in the industry. Lithium-ion batteries are related to traditional lead-acid batteries, nickel-cadmium batteries and nickel-metal hydride batteries, which have higher energy density and higher charge/discharge rates, and therefore generate serious heat during operation. Especially in the field of power lithium batteries, the road conditions are complex, the environment is harsh (especially high temperature summer), the battery heating more intense, which has more demanding requirements for the capacity, life and especially the safety performance of lithium-ion batteries. To some extent, the safety of lithium-ion batteries is its thermal dissipation problem - once the lithium-ion battery thermal yield is greater than the cooling rate, the battery pack will heat up, when the heat exceeds the temperature of the battery pack can withstand a critical point, it is very easy to lead to safety accidents, so the heat dissipation problem of lithium-ion power battery pack is very Important.
