Every winter, major car companies will hold extreme cold tests in the cold north of China. However, few new energy models are involved in these test projects, because we all know that the performance of lithium batteries will be affected after low temperatures. With the advent of the new energy era, the contradiction between the cold and low temperature and the new energy vehicle is becoming more and more intense, and in the face of the biting cold wind, the desire of electric vehicles for temperature is no less than people's dependence on heating rooms. Problems such as discounted mileage and slow charging are endless, and the cold test of new energy vehicles has also become a hot topic in the media. Recently, in order to focus on the real pain points of low temperature start and low temperature defrosting in the user's winter driving, Xiaopeng Automobile simulates the real car use scene of the user in winter, and in the industry authoritative organization China Automotive Technology and Research Center, Xiaopeng P5 conducted an extremely cold test lower than the national standard test temperature.
For the low temperature start test, the requirements of the national standard are carried out at a temperature of -18 ° C, and this time Xiaopeng Automobile in order to more realistically simulate the extremely cold conditions in winter, the experiment first carried out the Professional Experimental Cabin Extreme Cold "soaking" of Xiaopeng P5 for up to 8 hours, until the temperature inside and outside the vehicle dropped to -23 °C.
After the preparation, the staff of China Automobile Research Institute officially started the test, first of all, the remote low temperature start test, when the staff pressed the remote start button on the mobile phone, Xiaopeng P5 started successfully instantaneously, faster than the national standard required within 7 seconds to start; followed by the detection of the defrosting speed of the vehicle, after the vehicle started, Xiaopeng P5 immediately entered the working state, within 20 minutes the front window defrosting reached 99.8% (80% of the 20 minutes above the national standard requirement); in 40 minutes it has reached 100% defrosting. (90% of the 40-minute defrost required by the national standard), and the windshield is not blurred and does not affect the driver's vision. In the end, Xiaopeng P5 successfully passed these two tests with a number of indicators higher than the requirements of the national standard.
With more stringent test conditions than the national standard, it can still have excellent performance beyond the national standard, which is due to the X-HP intelligent thermal management system unique to Xiaopeng P5. This system is the first time in the same level equipped with heat pump air conditioning, in the air conditioning system efficient, energy-saving, comfortable, in the premise of ensuring the thermal comfort of the crew compartment, all-round energy saving, effectively solve the problem of low temperature energy consumption, winter endurance than the traditional PTC heating increased by about 15%; followed by intelligent safety heat control, can achieve -30 °C -55 °C ultra-wide use temperature range, according to the needs of the power system, so that the power system is always in the best working temperature range, to ensure the thermal safety of the power system, shorten the charging time, increase the mileage.
Xiaopeng P5 series models are equipped with indirect heat pump system + water heater two heating methods of air conditioning and heat management system. In the extremely low temperature (-10 °C below) the use of water heater for air conditioning heating and battery heating, water heater has the advantages of high power output, fast heating response, to ensure the good performance of air conditioning and battery heating in cold environment. Cooperate with BMS to achieve rapid heating of the battery under extremely low temperature conditions above -30 °C, and improve the battery charging rate under extremely low temperature conditions.
Under driving conditions, the waste heat recovery technology of the motor is used to maximize the use of waste heat generated by the electric drive system during the driving process to heat and insulate the battery pack, increase the depth of low temperature discharge of the battery, and increase the discharge power of the battery. At an ambient temperature above -10 °C, the use of heat pump system for air conditioning heating, heat pump system has an energy efficiency ratio of more than 1 (COP), by absorbing the heat of the ambient air to the air conditioning heating use, 1Kw electric power can produce more than 1Kw of heat, can greatly reduce the energy consumption of air conditioning. Xiaopeng P5 battery in the temperature range of more than -30 °C can work normally, so as to ensure the normal start of the vehicle, basically meet the needs of users in more than 90% of China's cities
After so many practical test projects, we have found that in cold areas, using electric vehicles is indeed a big challenge. Loss of mileage, extended charging time and the opening of warm air conditioners all make electric vehicles instantly become "weak chickens". However, from the 550-hour seawater shower experiment to the extreme cold challenge, Xiaopeng Automobile is using the extreme test again and again to test the "Pengpai quality", and using strict challenges to show every user the determination of Xiaopeng Automobile to put quality first. In fact, such achievements are expected.
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