Design with XH-M609 LVD Relay Battery Low Voltage Protection in Cirkit DesignerThe XH-M609 is a low voltage disconnect (LVD) relay module designed to protect batteries from over-discharge. It monitors the battery voltage in real-time and automatically disconnects the load when the voltage drops below a user-defined threshold. This feature helps prevent damage to the battery, extends its lifespan, and ensures reliable operation in various applications.
This circuit is a power management system that uses four Li-ion 18650 batteries connected to a 2S 30A BMS for battery management and protection. The system includes step-up and step-down voltage regulators to provide adjustable output voltages, controlled by a rocker switch, and multiple DC jacks for power input and output.
Open Project in Cirkit Designer
This circuit is a simple alarm system powered by a 18650 Li-Ion battery, regulated to 5V by a 7805 voltage regulator. It uses a reed switch to detect magnetic fields, which triggers a BC547 transistor to activate a buzzer when the switch is closed.
Open Project in Cirkit Designer
This circuit is a battery management and power supply system that uses three 3.7V batteries connected to a 3S 10A Li-ion 18650 Charger Protection Board Module for balanced charging and protection. The system includes a TP4056 Battery Charging Protection Module for additional charging safety, a Step Up Boost Power Converter to regulate and boost the voltage, and a USB regulator to provide a stable 5V output, controlled by a push switch.
Open Project in Cirkit Designer
This circuit is designed to provide a backup power solution using a 12V 200Ah battery and a 12V power supply, with the HX-M350 module managing the switching between these power sources. The HX-M350 module automatically switches to the battery power when the main 12V power supply fails or is unavailable, ensuring uninterrupted power to the load. There is no microcontroller or additional control logic involved, indicating that the switching mechanism is likely handled entirely by the HX-M350 module itself.
Open Project in Cirkit DesignerBelow are the key technical details and pin configuration for the XH-M609 module:
| Parameter | Specification |
|---|---|
| Operating Voltage | DC 12V |
| Voltage Detection Range | 10.0V - 14.0V |
| Control Accuracy | ±0.1V |
| Maximum Load Current | 10A |
| Display Type | 3-digit 7-segment LED display |
| Dimensions | 82mm x 58mm x 18mm |
| Operating Temperature | -40°C to +85°C |
| Pin Name | Description |
|---|---|
BAT+ |
Positive terminal for battery connection |
BAT- |
Negative terminal for battery connection |
LOAD+ |
Positive terminal for load connection |
LOAD- |
Negative terminal for load connection |
SET Button |
Used to set the low voltage disconnect threshold and other parameters |
Connect the Battery:
BAT+ pin.BAT- pin.Connect the Load:
LOAD+ pin.LOAD- pin.Power On the Module:
Set the Low Voltage Threshold:
SET button until the display starts flashing.SET button to adjust the low voltage disconnect threshold.Operation:
While the XH-M609 operates independently, it can be monitored using an Arduino UNO for additional functionality, such as logging battery voltage or triggering alerts. Below is an example code snippet:
// Example: Reading battery voltage from XH-M609 using Arduino UNO
// Connect the BAT+ terminal to an analog input pin on the Arduino
// Ensure a voltage divider is used if the battery voltage exceeds 5V
const int analogPin = A0; // Analog pin connected to BAT+ (via voltage divider)
float voltage = 0.0; // Variable to store the calculated voltage
void setup() {
Serial.begin(9600); // Initialize serial communication
}
void loop() {
int sensorValue = analogRead(analogPin); // Read the analog input
voltage = sensorValue * (5.0 / 1023.0); // Convert to voltage (adjust for divider)
// Print the voltage to the Serial Monitor
Serial.print("Battery Voltage: ");
Serial.print(voltage);
Serial.println(" V");
delay(1000); // Wait 1 second before the next reading
}
Note: If the battery voltage exceeds 5V, use a voltage divider to step it down to a safe range for the Arduino's analog input pins.
| Issue | Possible Cause | Solution |
|---|---|---|
| Module does not power on | Incorrect battery connection | Verify the polarity and ensure secure connections to BAT+ and BAT-. |
| Load is not disconnecting at low voltage | Incorrect threshold setting | Recheck and adjust the low voltage threshold using the SET button. |
| Relay clicks repeatedly | Voltage near the threshold causing rapid switching | Increase the hysteresis or stabilize the power supply. |
| Display shows incorrect voltage | Loose or corroded connections | Clean and tighten all connections. |
Can the XH-M609 be used with a 24V battery?
No, the module is designed for 12V systems only. Using it with a 24V battery may damage the module.
What happens if the load exceeds 10A?
Exceeding the maximum load current can damage the relay. Use an external relay or contactor for higher current loads.
Can I use the XH-M609 with a lithium-ion battery?
Yes, but ensure the low voltage threshold is set according to the battery's specifications to avoid over-discharge.
How do I reset the module to factory settings?
Press and hold the SET button for 10 seconds to reset the module to its default settings.
By following this documentation, you can effectively use the XH-M609 to protect your battery and ensure reliable operation in your projects.