Why do new energy vehicle power batteries need to be heated?
The simple meaning is: because the temperature in winter is too low, it is difficult for the battery of an electric vehicle to be fully charged, and it is also difficult to discharge it completely during discharge. Electric vehicles can solve this problem by installing a car parking heater to preheat the new energy vehicle battery pack so that it is in normal condition. The working temperature is used to solve the problem of reduced battery life of new energy electric vehicles in low-temperature environments in winter and avoid damage to the battery pack caused by low-temperature charging.
The battery pack heating system of new energy pure electric vehicles mainly uses the following two methods: preheating and fuel water heating. By installing a water heating heater on the new energy electric vehicle, the heat is transferred to the battery pack to heat it to achieve normal operating temperature. New energy high-voltage electric heater By installing a PTC heater on a new energy electric vehicle, it can transfer heat to the electric vehicle battery pack to preheat it and keep it at normal operating temperature.
New energy pure electric vehicle battery pack heating system solution In winter, the range of new energy electric vehicles will generally be greatly reduced, mainly because at low temperatures, the viscosity of the electrolyte in the battery pack increases and the charge and discharge performance of the battery pack decreases. Theoretically: It is forbidden to charge lithium batteries in an environment of minus 20 degrees Celsius (it will cause damage to the battery). Electric vehicles can solve the problem of reduced battery life of new energy electric vehicles in low-temperature environments in winter by installing a parking heater to preheat the battery pack of new energy vehicles so that it is at normal operating temperature and avoid damage to the battery pack caused by low-temperature charging.
The fuel of the water heating heater can be fuel, diesel, formaldehyde and other types. It has low fuel consumption and no obvious noise. In addition to preheating the car battery pack, it can also heat the cab of new energy electric vehicles, reducing the power consumption of electric vehicles. consumption, extend the service life of electric vehicles, and save the cost of battery pack replacement.
PTC heater, also called PTC heating element, is composed of PTC ceramic heating element and aluminum tube. This type of PTC heater has the advantages of small thermal resistance and high heat exchange efficiency. It is an automatic constant temperature and power-saving electric heater. The outstanding feature lies in the performance. That is, when the fan fails and stops, the power of the PTC heater will automatically drop sharply because it cannot dissipate sufficient heat. At this time, the surface temperature of the heater is maintained at around the Curie temperature (usually 250°C). up and down), so as to avoid the phenomenon of "redness" on the surface of electric heating tube heaters, which will not cause burns, fires and other hidden dangers.
It consists of heat-dissipating aluminum sheets, aluminum tubes, conductive sheets, insulating films, PTC heating sheets, nickel-plated copper electrode terminals and high-temperature plastic electrode sheaths. This product uses a press-fit heat sink, which improves its heat dissipation rate, and fully takes into account various thermal and electrical phenomena of the PTC heating element during operation. It has strong bonding force, excellent thermal conductivity and heat dissipation performance, high efficiency and reliability. This type of PTC heater has the advantages of small thermal resistance and high heat exchange efficiency. It is an automatic constant temperature and power-saving electric heater.
PTC heater principle Constant temperature heating PTC thermistor has constant temperature heating characteristics. The principle is that after the PTC thermistor is powered on, it self-heats and the resistance value enters the transition zone. The surface temperature of the constant temperature heating PTC thermistor will maintain a constant value. The temperature is only related to the Curie temperature of the PTC thermistor and the applied voltage, and has basically nothing to do with the ambient temperature.
