With the development of the automobile industry, new energy vehicles have gradually become an important development direction of the automobile industry. Among them, dcdc charger is one of the important components of new energy vehicles, which is mainly used to convert the DC power output from the high-voltage battery to the DC power needed by the low-voltage electronic system.
As we all know, the vehicle power pack is stored inside the high-voltage DC power, this power can not be directly to the vehicle lighting, entertainment, instrumentation, and other low-voltage equipment for direct use, then there is a need for a device that will convert the high-voltage DC power into 12V low-voltage DC power for the vehicle's low-voltage equipment to provide power, this work is done by the DCDC module in the electronic control system.DCDC not only provides power for the DCDC can not only provide electricity for vehicle voltage equipment, when the vehicle battery power is too low, DCDC will also be charged for the battery, playing a "generator" role.
1、What is DCDC?
DCDC means DC to DC (conversion of different DC power values), which is a device that converts one voltage value of electrical energy to another voltage value of electrical energy in a DC circuit. For example, if a DC voltage (5.0V) can be converted to another DC voltage (1.5V or 12.0V) by a converter, we call this converter a DC-DC converter, or a switching power supply or switching regulator.
Specifically refers to the self-excited oscillator circuit to convert the input DC into AC, and then through the transformer to change the voltage and then converted to DC output, or through the voltage doubling rectifier circuit to convert AC into high-voltage DC output.
2, DCDC classification
DCDC according to the voltage level transformation relationship between the step-up power supply and step-down power supply two categories, according to the input-output relationship between isolated power supply and non-isolated power supply two categories. For example, the DC/DC converter connected to the vehicle's DC power supply is a high-voltage DC converter for low-voltage DC.
3, the composition of the DCDC converter
DCDC converter is generally composed of a control chip, inductor coil, diode, transistor, and capacitor. In the discussion of DC-DC converter performance, if the control chip alone, is not able to determine its strengths and weaknesses. The characteristics of its peripheral circuit components, and substrate wiring, etc., can change the performance of the power supply circuit, therefore, should be a comprehensive judgment.
4, the role of the DCDC converter
DCDC converter, as a very important part of the electric vehicle power system, is an important function for the power steering system, air conditioning, and other auxiliary equipment to provide the required power. Another category is present in the composite power system, and supercapacitors in series, play a role in regulating the power output and stabilizing the bus voltage.
In addition, DC-DC converters are widely used in products such as cell phones, MP3s, digital cameras, and portable media players.
DCDC converter is one of the important components of new energy vehicles, and its function is to convert the DC output from the high-voltage battery into the DC required by the low-voltage electronic system. If there is a problem with the DCDC converter, it may affect the normal operation of the vehicle, which may cause driving safety hazards. Therefore, testing the DCDC of new energy vehicles can guarantee the normal operation of new energy vehicles.
As one of the important components of new energy vehicles, the performance of the DCDC converter directly affects the performance of the whole vehicle. Therefore, the test of the DCDC converter can ensure that its performance meets the design requirements, so as to ensure the performance of the whole automobile.
