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BIT develops "power Ni-MH battery packs" to solve the problem of electric vehicle continuation during the Winter Olympics
Facing low temperature conditions, the charging and discharging characteristics of electric vehicle power lithium batteries will deteriorate, and the capacity and life will also attenuate, resulting in a significant decrease in vehicle driving range and vehicle power performance, and a significant increase in charging time. "In terms of solving the low-temperature application of electric vehicle power lithium batteries, an important solution is to use external heating. However, this battery heating system has high energy consumption, long time, low efficiency, and poor effect."
In addition, the terrain of the Hebei competition area of the Beijing Winter Olympics is mainly mountainous. In winter, road slopes and icy and snowy roads will cause vehicle driving conditions to be very complicated.
In the face of complex road conditions, existing electric-based new energy vehicles are generally less intelligent and cannot meet the requirements for vehicle intelligence in complex road conditions such as low-adhesion roads covered with ice and snow. posed greater challenges. Generally speaking, complex road conditions and low intelligence restrict the large-scale application of electric vehicles in the Beijing Winter Olympics.
The reporter learned that Beijing Institute of Technology, the American ECPOWER Company and other units have jointly developed a lithium-ion power Ni-MH battery packs system product with self-heating technology in ultra-low temperature areas and carried out industrial mass production. The battery system can be applied to even lower temperatures, -30 Based on the self-heating method, the battery temperature rises above 0 in tens of seconds, thereby activating the normal application of power lithium batteries. This technology solves the problem of low battery temperature through physical methods, is suitable for various battery systems, and completely solves the problem of electric vehicles. In winter, many problems such as sharp decrease in driving range, inability to start, attenuation, and safety hazards are of milestone significance for the development of electric vehicles.
Beijing Institute of Technology also cooperates with Hunan Huaqiang Electric Co., Ltd. to carry out application research on low-temperature air supply and enthalpy increasing technology. Compared with PTC heating, it has the characteristics of wide temperature range, high energy efficiency, good safety, etc., and solves the problem of temperature limitation and energy efficiency. The problem is low and can meet the low-temperature environment heating requirements of electric vehicles during the Winter Olympics.
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