Four-channel electronic load_battery capacity tester

1. Product Introduction

A multifunctional four-channel electronic load/battery capacity tester. Full touch screen operation, multi-parameter display, each channel can be set and operated independently.

2. Application scenarios

Power performance test, aging test, battery, power bank and other capacity tests, battery usage by capacity.

3. Product overview

The main control is a low-cost four-channel electronic load implemented based on STM32G070 MCU. Sampling with internal built-in ADC. PWM filtering is used as an analog reference.

Constant voltage and constant current mode loads are regulated by hardware, and modes such as constant resistance and constant power are regulated by software.

Four channels can be set independently. There can be up to 1V differential between each channel.

4. Product parameters

The main parameter performance is as follows:

1. Integrated four-channel electronic load/capacity tester

2. The maximum current of each channel is 3A, and the voltage is 6V. Single channel full power 18W (maximum 25W). (BOM and firmware can be modified to modify the range)

3. There can be a voltage difference of 1V between each channel, which solves the problem of the current direction of the multi-channel output ground wire.

4. Support constant voltage load, constant current load, constant resistance load and constant power load.

5. Support capacity AH, energy WH, running time, voltage, current, power and other parameters display

6. Support temperature control intelligent fan control.

7. Support constant voltage or constant current mode indicator light display.

8. 4.3-inch serial port screen display and set parameters, touch screen control.

8. The chart curve shows the discharge trajectory.

9. 1% accuracy without calibration, 0.2%-0.5% accuracy after manual calibration.

10. The firmware is still being upgraded, and other functions will be expanded~~~

System parameters:

External 12V power supply, maximum current 0.5A

The PCB adopts a double-layer board structure.

Size 18cm*14cm

Components are laid out on one side.

Please contact my email after purchase: liugang340827@126.com, I will send the information to your email after purchase. If you have any questions, please email me in advance. Thanks