What is the current status and trend of low-temperature heating of lithium batteries?

On July 28-29, 2017, the “Tenth High-tech Lithium-Ion Industry Summit Forum” hosted by Gaogong Lithium Power, supported by Jiangyin Municipal Government and co-organized by Su Dahui Cheng was opened in Jiangyin City, Jiangsu Province. From various segments of the industrial chain, more than 500 guests from domestic and foreign leading companies, policy makers, industry experts and scholars in the field discussed the opportunities and challenges faced by new energy vehicles and power battery industry in the new industry cycle.

Among them, Chunjie Sun, Sales Director of Jiangyin Huilong Electric Appliance Co., Ltd., gave a wonderful speech on “power battery Thermal Management Technology”, focusing on the necessity, status quo and trend of lithium battery thermal management.

Chunjie Sun introduced that with the decrease of temperature, the discharge performance of lithium battery decreased significantly, the discharge platform decreased significantly, and the discharge capacity decreased significantly. When the temperature drops to -30 ° C, the discharge capacity of the battery is 87.0% of the room temperature discharge capacity, long-term use in low temperature environment, or in the ultra-low temperature environment of -40 ° C, the power supply will be permanently damaged by "freezing". Therefore, thermal management of lithium batteries is particularly necessary.

At present, there are two main ways for low-temperature heating of lithium batteries. One is variable resistance heating, including PTC heating plate and carbon film heating plate; the other is constant resistance heating, including silicone heating plate, PI heating film, and epoxy board. Heat the film.

For the future development trend of lithium battery thermal management, Sun Chunjie believes that the water cooling mode will become the mainstream application. The water-cooled plate is installed on the side or the bottom of the battery, and is connected to the condenser through the inlet and outlet pipes, and heat is taken away by the fluid flow to dissipate heat from each of the batteries.

Chunjie Sun introduced that as a professional manufacturer of electric heating products, it has more than 20 years of research and development history of flexible heaters since the beginning of 1995. The company has established Wuxi Flexible Heater Engineering Technology Research Center, established cooperation relationship with many domestic and foreign industry experts, and set up an overseas engineering studio to jointly develop new products.

The main products include electric heating plate, electric heating film, silicone rubber heater, oil drum heater, Kapton heater, silicone rubber heating plate, silicone rubber wire and cable, instrument insulation pipe and electric (with) tropical, etc., and the market covers new energy automobiles, semiconductor, medical,special, power and other industries.

It is reported that Huilong has more than 20 national utility model patents, and has applied for many invention patents at home and abroad, and its core product technology has reached the leading level at home and abroad. With its strengths in R&D, production and quality, Huilong has become a core supplier in related industries.

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