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Voltage and Current Detection Function Electric Vehicle Charger Solution

Solution:

* Current, voltage sampling through the microcontroller built-in A/D

* Output current, voltage control through the microcontroller

1.Design purpose: to realize the cost control of the intelligent charger program

At present, due to the fierce price competition in the e-bike market, in order to control the cost of chargers to pure analog circuits, based on the intelligent charger of the microcontroller is only used in some high-end brands. Haier's HR6P61P2S4L intelligent charger program basically exhausts all the resources of this microcontroller, the cost is well controlled, the cost is only higher than the use of pure analog circuits of the charger 1RMB or so, has a good market competitiveness and achieve intelligent regulation of the charging voltage and charging current and a wide range of regulation, and over-current, over-voltage, over-temperature and other protection, It also has over-current, over-voltage, over-temperature protection, bad battery indication and other functions.

2. Charging mode:

The program is based on the charging characteristics of the battery and combines the patent research results with the stage charging mode, which is divided into: fast charging 1, fast charging 2, medium-speed charging, constant-voltage charging, high-pressure repair, trickle maintenance. This mode adopts the way of judging the charging current, charging voltage and charging time to complete the whole charging process, which prevents over-current, over-voltage, over-temperature and other damages to the battery.

3. System architecture: as shown in Figure 1

4. Basic control circuit: as shown in Figure 2