AIWAYS introduces ‘sandwich’ EV battery pack

13th May 2020
Alex Lynn

AIWAYS has revealed further details of its ‘sandwich’ structure battery pack, which improves stability and significantly reduces the risk of battery safety incidents. By separating the dry and wet areas of the cell, AIWAYS negates the risk of coolant leakage – a cause of more than 80% of battery safety incidents.

AIWAYS’ world-first sandwich structure battery achieves this by placing an isolation plate between the battery module and the cooling plate, making it impossible for leaking coolant to enter the module, even after a substantial impact. The structure also provides partial insulation, reducing the rate of heat transfer between the external environment and the battery module.

To further enhance efficiency, AIWAYS has developed a proprietary battery management system (BMS) which uses advanced state-of-charge (SOC) algorithms to monitor, manage and communicate real-world power consumption. The deep self-learning function of the SOC algorithm provides accurate feedback on energy expenditure according to driving habits – prompting users to potentially modify driving behaviour and extend battery life.

AIWAYS winter testing revealed exceptional performance in comparison with other automotive battery systems, and meant the U5 all-electric SUV was able to achieve a real-world range of close to 300km at below 0°C on its 15,000km engineering drive from China to Germany last year. The U5 engineering drive completed by AIWAYS set a new GUINNESS WORLD RECORDS title for the ‘longest journey by an electric vehicle (prototype)’.

The AIWAYS sandwich battery pack has undergone 580 rigorous tests, far more than the 51 tests required by the Chinese national standard. To ensure the safety and reliability of the battery pack, tests have covered electrical, chemical and physical elements, including short-circuit tests, extreme heat and frost tests and starting the battery at high and low temperatures.

With a capacity of 63kWh, the battery unit in the U5 is capable of delivering enough charge to cover more than 400km according to the WLTP. For the ultimate convenience, the U5’s battery can be rapid-charged from 20 to 80% in just 40 minutes using a DC charger. It can also charge from ten to 95% in less than eight hours using a (6.6kW Type 2) AC charger for overnight recharging.

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