The reason why electric cars are also called "electric dad" is that their endurance mileage in cold weather in winter is almost half lost, which is a headache for many northern car owners. So is there any way to effectively ensure the motive endurance of electric vehicles? Recently, Nezha automobile officially released the technical details of its self-developed " Tiangong battery ", which may alleviate the embarrassment of the electric dad to a certain extent.
It is understood that Tiangong battery has focused on the optimization of battery structure safety design, thermal management system, intelligent cloud management and other aspects. The test has been completed and will be used on the new Nezha s for the first time.
*Safety of battery structure *: "Tiangong battery" realizes three-level protection of cell, module and whole package, and can provide safety functions such as 1000 ℃ heat insulation between cells, 800V electrical insulation of modules, IP68 grade whole package waterproof, effectively control safety problems such as heat diffusion and insulation damage, and can provide 185wh/kg system energy density.
*Thermal management system : "Tiangong battery" applies the hozonept4.0 constant temperature thermal management system developed by Nezha automobile. With the functions of feedforward control and driving heating, it can increase the endurance in winter by 20%, reduce the charging energy consumption by 2%, and improve the low-temperature charging efficiency by 20% .
In addition, the battery thermal management system can intelligently understand the subsequent driving conditions according to the current navigation settings of the vehicle, and predict the cooling or heating demand of the battery in advance, so as to make the operation of the battery temperature control system more efficient and save 2% of the energy consumption for a single charge.
*Intelligent Cloud Management *: the battery active monitoring system carried by Tiangong battery has various battery safety monitoring and early warning algorithms such as battery available capacity SOH calculation and lithium precipitation calculation, and can cover different scenarios such as driving, charging and static.
With the support of the big data cloud platform provided by 360, it will also develop the most suitable battery management scheme for each vehicle through massive data analysis, so as to realize one policy for each vehicle and make the battery life more lasting.
The Nezha s equipped with a new battery will be released in the near future. It provides both pure electric and extended range power versions, of which the extended range version has a pure electric endurance of 300 km under NEDC conditions , and a total endurance of 1100 km; The pure electric version of CLTC has a range of 715km, of which the 4WD version only accelerates in 3.9 seconds.
