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 the electrolyte viscosity of the battery pack increases at low temperatures, and the charge and discharge performance of the battery pack decreases. Theoretically: In an environment of minus 20 degrees Celsius, it is forbidden to charge lithium batteries (it will cause damage to the battery). Electric vehicles can solve the problem of preheating the battery pack of new energy vehicles at normal operating temperature by installing a car parking heater, so as to solve the problem of the decline in battery life of new energy electric vehicles in low temperature environments in winter, and avoid damage to battery packs caused by low temperature charging .
The battery pack heating system of new energy pure electric vehicles mainly uses the following two methods:
Preheating and heating solution 1: Fuel water heating heaters are installed on new energy electric vehicles, and the heat is transferred to the battery pack to heat up to the normal working temperature.
The fuel of the water heating heater can be fuel oil, diesel, formaldehyde and other types, with low fuel consumption and no obvious noise. In addition to preheating the car battery pack, it can also heat the cab of the new energy electric vehicle, reducing the power of the electric vehicle consumption, increase the service life of the electric vehicle, and save the cost of changing the battery pack.
Preheating Heater Solution 2: New Energy High Voltage Electric Heater
By installing PTC heaters on Xinneng electric vehicles, the heat can be transferred to the electric vehicle battery pack to preheat it and keep it at normal operating temperature.
PTC heater
PTC heater is also called PTC heating element, which 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 electric heater with automatic constant temperature and power saving. The outstanding feature lies in the performance, that is, when the fan fails to stop, the power of the PTC heater will automatically drop sharply due to insufficient heat dissipation, and the surface temperature of the heater is maintained at around the Curie temperature (generally around 250°C) ), so as not to produce the phenomenon of "redness" on the surface of heaters such as electric heating tubes, so as not to cause burns, fire and other hidden dangers.
It is composed of heat-dissipating aluminum sheet, aluminum tube, conductive sheet, insulating film, ptc heating sheet, nickel-plated copper electrode terminal and high-temperature plastic electrode sheath. Due to the use of press-fit heat sinks, this product improves its heat dissipation rate, and fully considers various thermal and electrical phenomena of ptc heating elements during work. It has strong bonding force, excellent heat conduction 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 electric heater with automatic constant temperature and power saving.
