High temperature is the “natural enemy” of power batteries. It will quietly reduce the driving range and may also hide safety risks. The interior of the car is as hot as a steamer after being exposed to the sun. How can we cool it down efficiently and save electricity? What precautions should be taken when fast charging? The “minefield of damage to cars” for new energy vehicles in hot summers provides protection tips and solutions to help you travel worry-free in summer.
1. Battery management.
(1) Charging problems after high temperature exposure
· Damage to the car: Charging immediately after high temperature exposure, especially fast charging, will increase the battery temperature. If it exceeds 45°C, it will increase the internal loss of the battery and cause irreversible attenuation of the driving range.
· Avoidance methods: Let the vehicle stand for 10-15 minutes to dissipate heat before charging; choose to charge in the early morning, evening or in a cool place; monitor the battery temperature and stop charging when it exceeds 55°C.
(2) Long-term low-battery parking problems
· Damage to the car: If the vehicle is parked outdoors for more than two weeks with a battery level below 20%, the high temperature will accelerate the self-discharge of the battery, causing deep damage to the electrode material and causing a decrease in capacity.
·Avoidance method: Keep the battery at 50%-80% before parking.
(3) Battery thermal management awareness
·Car damage manifestation: Thinking that there is no need to worry about battery problems as long as the battery is fully charged, frequently fast charging in high temperature environment or charging under the scorching sun for a long time.
·Potential hazards: Batteries are sensitive to temperature and are prone to overheating in high summer temperatures, affecting battery life and performance, increasing the risk of thermal runaway, and even causing safety accidents.
·Correct approach: Try to charge in a cool place or underground parking lot, use slow charging; pay attention to the battery management system, and perform regular battery health checks.
2. Air conditioning use.
(1) Immediately turn on the air conditioning internal circulation problem after exposure to the sun
·Car damage manifestation: After getting in the car, close the windows and turn on the air conditioning internal circulation. At this time, the temperature in the car is extremely high. The air conditioning system first processes the accumulated heat, the cooling efficiency is low, and the air conditioning filter and evaporator are burdened, which is easy to breed bacteria and produce odor.
·Correct approach: Open all doors and windows after getting in the car, turn on the fan to circulate externally, and let the hot air out of the car. After driving for a few minutes, close the windows and turn on the air conditioner. First adjust the external circulation, and then switch to the internal circulation after the temperature drops.
(2) Air conditioner temperature setting problem
·Damage to the car: If the air conditioner temperature is set too low and unchanged for a long time, the air conditioner compressor will run at high load for a long time, increasing power consumption. The temperature difference between the inside and outside of the car is too large, and people are prone to catching colds when entering and exiting the vehicle.
·Suggestion: Set the air conditioner temperature to 24°C-26°C, and switch the air conditioner’s internal and external circulation mode every once in a while.
III. Tire maintenance.
(1) Ignoring tire pressure and wear problems
·Damage to the car: In summer, the road temperature is high, and the tire pressure increases with the temperature. Some car owners do not pay attention to tire pressure inspection and tire wear.
·Potential hazards: Too high tire pressure will cause tire blowout; too low tire pressure will increase driving resistance, increase power consumption, and accelerate tire wear.
· Avoidance method: Check tire pressure regularly and adjust according to the tire pressure standard specified by the vehicle; check tire wear and replace severely worn tires in time.
(2) Impact of high temperature on tires
· Damage to the vehicle: Driving vigorously under high temperature, new energy vehicles have large torque and heavy weight, which can easily aggravate tire wear.
· Avoidance method: Check tire pressure frequently, check and adjust tire pressure to the manufacturer’s recommended value when the vehicle is cold, and never too low; spare tires or tire repair tools should be complete.
IV. Charging habits.
(1) Charging environment and time issues
· Damage to the vehicle: In the summer, the temperature is high, and some car owners charge their cars at random, or even charge their cars in the sun. Long-term overcharging will damage the battery.
· Avoidance method: When charging, try to choose a cool and ventilated place; according to the suggestions in the vehicle manual, reasonably control the charging time, do not overcharge, and disconnect the power supply in time after full.
(2) Frequent use of fast charging
· Damage to the vehicle: Frequent use of fast charging, especially in the summer when the temperature is high, the battery is highly active, and the heat generated during fast charging is not easy to dissipate, affecting the battery life.
· Avoidance method: When conditions permit, use slow charging as much as possible; if fast charging is required, pay attention to the ambient temperature during charging and avoid overheating.
V. Other vehicle use habits.
(1) Problems with placing flammable items in the car
· Damage to the vehicle: Lighters, perfumes, power banks and other flammable items are placed in the car. In summer, the temperature inside the car is high and they are prone to explosion or combustion due to high temperature, which poses a safety hazard.
·Avoidance method: Develop the habit of checking the interior of the car before getting out of the car and do not leave flammable items in the car.
(2) Driving habit problems
·Damage to the vehicle: Frequent sudden acceleration and braking increases power consumption, causes impact on the battery and motor, and affects the service life of the vehicle.
· Improvement suggestions: Try to keep steady when driving, and accelerate and brake slowly.
(3) Problems with over-reliance on on-board electronic devices
· Damage to the vehicle: When parking and waiting for someone, using the multimedia entertainment system, navigation or charging the mobile phone for a long time will increase the burden on the vehicle’s electrical system, consume a lot of power, increase the burden on the battery, reduce the cruising range, and may also generate heat accumulation, which is not conducive to the heat dissipation of the entire vehicle.
·Avoidance method: Arrange the use time reasonably and avoid long-term continuous use of high-power electrical appliances. If it is necessary to use, hybrid models can start the engine, and pure electric models can plug in an external power supply.
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