lithium-ion battery structure that self-heats at low temperatures - lithium ion cell

Lithium-
Ion batteries suffer severe power losses at temperatures of minus C, limiting their use in applications such as electric vehicles in cold climates and high temperatures
Altitude 1, 2.
The practical consequence of this power loss is the need for a larger, more expensive battery pack to perform a cold start of the engine, slow charging in cold weather, restricted regenerative braking, and reduced vehicle cruising range up to 40 per cent3.
Tried to improve low before
Temperature Properties of lithium
Ion batteries4 focuses on the development of additives to improve low
The temperature behavior of electrolysis 5, 6 and external heating and insulation cells7, 8, 9.
Here we report lithium.
Ion battery structure, full
Climate batteries, heating themselves from below zero degrees Celsius without the need for an external heating device or electrolyte additive. The self-
The heating mechanism produces an electro-chemical interface conducive to high discharge/charging power.
We showed the warmth inside.
Within 20 seconds of minus 20 degrees Celsius, within 30 seconds of minus 30 degrees Celsius, this battery rises to zero degrees Celsius and consumes only 3.
8% and 5.
Accounted for 5 of the battery capacity. The self-heated all-
The climate battery generates a discharge/regeneration power of 1,061/1,425 watts per kilogram at a charging state of 50 and minus 30 degrees Celsius, providing 6. 4–12.
Three times the power of the state. of-the-art lithium-ion cells.
We look forward to all
Climate batteries, enabling the engine stop-start technology to save 5-10 fuel for 80 million new cars made each year.
Considering that only a small part of the battery energy is used
Heating, we imagine all-
Climate batteries may also prove useful for plugs
Explore applications in electric vehicles, robots and spaces.