Application of Epps Power Supply in the Electric Vehicle Industry

Application of Epps Power Supply in the Electric Vehicle Industry

With the continuous growth of population and the continuous expansion of car usage, the dependence of cars on fossil fuels such as oil and the resulting environmental damage have also attracted increasing attention. The scarcity of energy and environmental pollution have raised people's demands for energy-saving in automotive environmental protection, and new energy vehicles are increasingly attracting people's attention.

New energy vehicles refer to vehicles that use unconventional vehicle fuels (other than gasoline and diesel) as their power source (or use conventional vehicle fuels but with new on-board power devices), integrate advanced technologies in vehicle power control and drive, and form advanced technical principles with new technologies and structures. There are three main types of power sources: Hybrid Electric Vehicle (HEV), Pure Electric Vehicle (EV), and Fuel Cell Electric Vehicle (FCEV).

With relevant national policies and support, the development of electric vehicles is becoming increasingly rapid, and various car manufacturers have launched their own electric vehicle series, such as Tesla, BYD, etc. The main components of electric vehicles include DC converters, DC variable frequency compressors, drive motors, on-board chargers, air conditioning compressors, accessory systems, and BMS lithium batteries. In order to cooperate with the development of the electric vehicle industry, Epson Power provides corresponding communication in the process of research and development, production, and testing of electric vehiclesVariable Frequency Power SupplyOr DC power supply products can be used to test the relevant components of electric vehicles.

The corresponding situation of electric vehicle components and corresponding power sources is shown in the following table:

A DC converter is a device that converts input DC power of one specification into DC power of different specifications and outputs it. In electric vehicles, its DC power comes from the internal power battery of the electric vehicle. Therefore, when testing it, it is necessary to use a power battery or a DC power source that can accurately simulate the characteristics of the power battery.

The input of the compressor frequency converter is also DC power. To accurately measure its normal operating voltage range, it is necessary to simulate the upper and lower limits of DC voltage. In addition, DC power is also required for aging and life testing. Our ADC series DC power supply can provide testing and aging DC power for compressor frequency converters.

The accessory system and power battery also require corresponding specifications of DC power during testing. Different DC voltages are required to test the operating voltage range and lifespan of the accessory system; The charging efficiency of power batteries needs to be tested, and they need to be charged using a charger or DC power source.

Our company's ADC series DC power supply adopts PWM pulse width modulation technology, which has the advantages of high power density, fast response speed, high output accuracy, and complete protection function. The output capacity is available in 2kW, 4kW, and 8kW single machines, and there are 19 inch standard system chassis with three heights (18U, 32U, 42U) available. The monitoring unit and power unit can be flexibly configured according to customer needs to form a DC power supply system, meeting various power requirements of customers.

Features of ADC series DC power supply products:

High power density:

The 2kW and 4kW power units have a height of only 2U, while the 8kW power unit has a height of only 4U. (Note: 1U=1.75 inches=4.445 centimeters)

■ Multiple protection functions:

It has overvoltage, overcurrent, short circuit, and over temperature protection functions.

Remote control and monitoring:

The device provides an analog monitoring interface to achieve remote control and monitoring of output voltage and current from 0 to 100.

■ 19 '' standard cabinet:

Beautiful appearance, space saving, and adaptable to user environment.

Remote sensing compensation:

Compensate for the voltage drop across transmission cables and contact resistance, with a compensation range of 0-3V.

The drive motor is the core component inside an electric vehicle, used to provide power to the vehicle. The performance of the motor itself will directly affect the high speed, acceleration performance, and climbing performance of electric vehicles. So it is necessary to conduct corresponding tests on the power and torque curves of the motor. The AFC series AC variable frequency power supply can provide standard testing power to ensure the accuracy of test data.

A car charger is a device that comes with an electric vehicle to charge the battery, and its input is AC mains power. The usual testing items that need to be conducted on it include: input protection function testing, input overvoltage and undervoltage, phase loss and underfrequency testing, and input voltage range testing. The above tests can be directly conducted using our AFC series variable frequency power supply to provide the necessary testing requirementsalternating currentPressure and frequency.

The air conditioning compressor is the air conditioning part on electric vehicles, and its testing items include pressure resistance, leakage, normal voltage frequency starting, low voltage low frequency starting, overpressure super frequency starting, fixed voltage frequency modulation starting, etc. Our AFC series variable frequency power supply can provide the AC voltage and frequency required for testing, providing a standard testing power supply for its production and testing.

Characteristics of AFC series variable frequency power supply products:

■ Output characteristics:

Output capacity range: 6-2000 kVA;

Output voltage range: 10~300V (L-N);

Output frequency range: 47~63Hz, 50Hz, 60Hz;

Quick response: reaction time ≤ 2ms;

High overall efficiency, reaching over 90% at full load;

High input power factor, reaching 0.92 or above at full load;

Comprehensive display function: Digital LED displays 4 power parameters, including voltage, current, frequency, and power;

Good electromagnetic compatibility characteristics: minimal impact on power grid quality and strong adaptability to loads;

■ Comprehensive protection, fault alarm, and display functions:

It has protection and alarm display functions for input undervoltage, phase loss, output overvoltage, overcurrent, overload, short circuit, inverter overheating, etc;

■ Independently designed inverter module;

When there is a malfunction, it can be stopped remotely/in close proximity with one click;

■ Equipped with optional RS232/RS485 communication function;

One click shutdown function in case of malfunction.

In addition, our company has also launched DC and AC chargers for electric vehicles for charging. Not only can it provide continuous, pure, and stable power supply quality, but it can also achieve local and remote control of the charger through internal control modules and communication modules. At the same time, the internal electronic circuit can quickly detect overcurrent, overload, overvoltage, and output short circuit, and automatically protect and cut off the output and issue alarms. The application of high-frequency circuit technology and modular configuration in the power supply unit improves the reliability of power supply and saves operating electricity costs. Compatible interface specifications can be widely used in various brands of electric vehicles and various types of charging applications.

The main specifications and parameters of the DC charger are as follows:

The main specifications and parameters of the AC charger are as follows:

Our company's electric vehicle charging station construction solution: