The new energy vehicle battery heater can keep the battery at an appropriate temperature to ensure the normal operation of the entire vehicle system. When the temperature is too low, these lithium ions will be frozen, hindering their own movement, causing the battery's power supply capacity to drop significantly. Therefore, in winter or when the temperature is too low, it is necessary to preheat the battery in advance of.
The battery pack heating system of new energy pure electric vehicles mainly adopts the following two methods: preheating and fuel water heating. By installing a water heating heater on the new energy electric vehicle, the battery pack is heated by heat transfer to reach the normal operating temperature. New energy high-voltage electric heaters can transfer heat to the electric vehicle battery pack to preheat it and keep it at normal operating temperature by installing PTC heaters on new energy electric vehicles.
New energy pure electric vehicle battery pack heating system solution In winter, the battery life 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.
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. Due to the use of press-fit heat sinks, this product 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.
Post time: Sep-12-2023
