Author ：Iflowpower – Portable Power Station Supplier
The electric car is also born in the late 19th century, but because of expensive cost, it quickly defeated the fuel car, and almost sold almost in the next 100 years, until the new century came, electric cars finally ushered in the new wave of production and manufacturing boom. According to the newly built pure electric passenger car enterprise management regulations released in 2015, the newly established electric car manufacturers must apply for the qualifications of two departments to produce and sell electric vehicles. These two qualifications are quite strict, and there are currently more than 70 China.
Among the household appliances, only 16 have received the qualifications of the National Development and Reform Commission, and nine of the Ministry of Industry and Information Technology, but there are traditional car companies in automobile production qualifications before this, not affected by new regulations. So those new vendors who don't have qualifications can rely on traditional car companies to save the country, such as the awareness of the Jianghuai. Weima acquired the two traditional car companies in Huanghai and Zhongshun.
With qualifications, they can rest assured that the car and fuel car body manufacturing have not significant differences. For the manufacturer, electric vehicle power system Design manufacturing is key, especially motor and batteries, battery is the core of electric cars, today's electric cars are almost all lithium batteries, such as Tesla's Madels, using Panasonic 18650 cobalt sink lithium battery, This is about 3,000 mA when we use the No. 5 battery usage.
On the Models85 model, each 74 batteries are connected in parallel, and each six battery packs are connected in series into a battery pack. Then use 16 battery packs into a battery board in series, ultimately, a total of 7104 pieces of battery can reach a working voltage of 400 volts. And 85 kW work voltage.
In order to prevent uneven charge and discharge, the battery is generated, attenuated or even invalid, exploded. Each battery pack in the battery board is equipped with a BMS battery management system, which can adjust the charge and discharge speed of the battery, and even make the battery to charge each other, keep the power uniform. BMS also has to heat the battery through the cooling system, and the cooling system currently has two main forms.
The air cooling of the natural wind or fan is used, the heat dissipation efficiency is poor, mainly used for the type of battery capacity, and circulating flows with coolant Cold, heat dissipation efficiency is the most common plan at home and abroad. In addition to cooling, BMS can also heat the battery to a suitable operating temperature in cold winter, especially in the northern region, can significantly improve the battery performance, battery and BMS are important to battery life, and the energy density of the battery is higher. The more the more battery can be plugged in a limited car body space, the more advanced the BMS, the longer the same battery, the longer mileage, Tesla has the strongest battery life, is because of the battery Performance and BMS algorithm leader, of course Tesla's prices are far ahead.
There are doubled GE3530 batteries in MODELX100D, and the battery life is 100%, but the price is five times. In addition to the reason for the import tax, the increased cost, there is also the premium brought by electric vehicle intelligence, today's emerging Internet car companies have no emphasis on the OTC air upgrade function of electric vehicles, and train the car to update the software like a mobile computer. Come and hang a vehicle, such as Dongfeng Honda CR-V has recalls more than 30,000 cars after exploding the brake problem, and Tesla's Model3 uses OTA to easily shorten the brake distance of about 6 meters.
In addition to repairing problems, OTA can improve the hard end of the vehicle, and the software in Tesla 2017 makes ModelX100D's 100-kilometer acceleration time to shorten 0.5 seconds. However, as your mobile phone sometimes blaste the screen, in the case of the OTA scheme, your electric car may also encounter the same dilemma.
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