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Electric passenger vehicle power battery system

The products are widely used for battery electric and hybrid electric passenger vehicles, for example, battery electric vehicle (BEV), plug-in hybrid electric vehicle (PHEV), hybrid electric vehicle (HEV), 48V micro hybrid vehicle and 12V start-stop system, etc.The product has been developed following the V-model of the automobile industry, which can realize seamless connection with vehicle model development of automobile enterprises to satisfy the customers’ requirements for process and progress.


Long service life: satisfying the demand of 10 years’ or 240,000km’s service life, which is the same as the service life of the vehicle.

The battery pack has a calendar service life as long as 10 years. A single cell has a calendar life over 14 years;

The mechanical property of a battery pack is designed according to ISO/DIS 12405-3: 2013, ensuring that the mechanical life can be more than 240,000km;

The high-efficiency liquid-cooling technology adopted can ensure no leakage in 15 years. Temperature maybe adjusted quickly to the range most suitable for operation of the cell where the difference in temperature is limited to 5℃;

The passive equalization mode of BMS can effectively adjust consistency level of the cell, ensuring consistency of the battery system in its service life and longer service life of the system

Excellent environmental suitability: The product has excellent environmental suitability for the vehicle to work under extreme working conditions.

There is a wide range of temperature at which the cell can be used. With excellent charging and discharging performances at both high and low temperatures, the product can guarantee endurance mileage of the vehicle at different temperatures;

The cell can be used in the temperature range of -30℃~60℃. At -20℃ and -30℃, the capacity retention ratios can respectively reach over 90% and 80% of that at normal temperatures. At -20℃, charging capacity of the cell can be as much as 0.1C

Various thermal management design schemes (air cooling, liquid cooling, direct cooling and heating) can effectively ensure that the battery pack adapts to extremely high or low temperature environments and enlarge the application area of the vehicle and increase convenience for use. (Charging may be conducted at low temperatures and the time for charging is shortened.)

Protection grade of the battery pack reaches IP67, IP6K9K and above so as to ensure the battery works in all hours under all weather conditions;

The internal and external pressure quick-balancing design of the battery pack can ensure that the vehicle operates normally in high altitude areas

The lithium-ion battery used complies with the certification requirements of QC/T 743-2006, UN38.3 and other standards, the safety requirements for abuse test of UL1642 and FreedomCAR as well as the safety requirements regarding mechanical impact, vibration, and simulation crashing, etc. of ISO/DIS 12405;

The battery pack satisfies the requirements for protection against electric shock of people specified in GB/T 18384, the requirements for flame retardation of UL 94-V0, and that for 60 seconds’ exposure of fuel in fire specified in ECE R100;

By combining active and passive protection measures, the battery management system can ensure that safety measures and failure countermeasures can be taken in case of danger;

Functional safety design levels of the battery management system (over-voltage, under-voltage, over-temperature, over-current, etc.) can satisfy ASIL C and meet the requirements of ISO26262, and have passed the TUV safety evaluation and approval of Germany;

Longer continuous mileage: Endurance mileage of the vehicle can be increased with the high energy-density cell and the light weight structural design

High-energy aluminum shell NCM lithium-ion battery is adopted, which has an energy density greater than 180Wh/kg;

High-energy aluminum shell LFP lithium-ion battery is adopted, which has an energy density as great as 130Wh/kg;

Energy density of LFP battery module can reach as high as 110Wh/kg; energy density of NCM battery module can reach as high as 150Wh/kg;

Energy density of PACK level: LFP battery box ≥5Wh/kg; NCM battery box ≥115Wh/kg.

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