Cara kerja battery relay

Summary

This video explains the function and operation of the battery relay in vehicles and heavy machinery. The battery relay controls the flow of current from the battery to the starting motor and other systems. It details how the starting switch activates the relay, allowing power to flow when necessary, and how the relay disconnects the circuit when off. The video also covers troubleshooting steps, such as checking voltage at the BR terminal, inspecting the starting switch, testing the ground connection, and ensuring proper relay functionality. This guide is essential for diagnosing and understanding battery relay issues.

Takeaways

• 😀 The battery relay connects or disconnects the battery's positive terminal to critical systems like the starting motor and electronics.
• 😀 The relay is controlled by the starting switch, which directs current to the relay terminal (BR) to activate it.
• 😀 When the starting switch is in the 'off' position, the relay remains off, and no power flows to the connected systems.
• 😀 In the 'on' or 'starting' positions of the switch, power flows to the relay and the connected systems, enabling them to function.
• 😀 The relay consists of a coil that becomes magnetized when current flows through it, activating a contactor that connects key terminals.
• 😀 To detect relay failure, check for 24V or 12V voltage at the BR terminal when the starting switch is on.
• 😀 If no voltage is present at the BR terminal, inspect the wiring between the starting switch and the relay for disconnections or faults.
• 😀 Ground continuity (e) should be tested to ensure a proper connection, with a resistance of less than 1 ohm indicating good continuity.
• 😀 A failure in the relay can also be detected by checking if the contactors between terminals B and M are properly connected.
• 😀 If connections are secure and the relay still fails, check for issues with the battery terminal connections or faulty relay components.
• 😀 Proper maintenance of the battery relay system ensures the smooth operation of essential systems in vehicles and heavy machinery.

Q & A

What is the main function of the battery relay in a vehicle or heavy equipment?

The battery relay connects or disconnects the positive terminal of the battery to the starting motor or other electronic systems, ensuring power flow when needed and cutting it off when not required.

How does the battery relay work when the starting switch is off?

When the starting switch is off, the battery relay remains inactive, preventing current flow from the battery to the starting motor or electronics, keeping the system powered down.

What happens when the starting switch is on in relation to the battery relay?

When the starting switch is on, current flows through the battery relay, activating its coil and generating a magnetic field that closes contactors, allowing power to reach the necessary components, such as the starting motor or electronics.

How is the battery relay activated in the system?

The battery relay is activated when the starting switch sends power to the relay’s BR terminal, which energizes the coil, creating a magnetic field that closes the contactors between the battery and the starting motor.

What should you check first when troubleshooting a battery relay?

First, ensure the starting switch is in the on position, and verify that there is a voltage (24V or 12V, depending on the system) at the BR terminal of the relay.

What does it indicate if there is no voltage at the BR terminal?

If there is no voltage at the BR terminal, it suggests an issue with the output from the starting switch or a break in the wiring between the switch and the battery relay.

What is the next step if the output from the starting switch is not functioning properly?

If the output from the starting switch is not providing voltage, check the wiring and ensure there is no break or disconnection in the connection between the starting switch and the battery relay.

How do you verify the ground connection of the battery relay?

To verify the ground connection, measure the continuity between the E terminal and the body ground. A resistance of less than 1 ohm indicates a good ground connection.

What should you check if the contactors between B (battery) and M (starting motor) are not connecting?

If the contactors are not connecting, it indicates that the battery relay coil is not functioning properly. The relay may be faulty and require replacement.

What are the signs of a loose or faulty connection in the battery relay system?

Loose or faulty connections can result in weak or no power flow through the system. Check for any loose or corroded terminals, particularly at the battery and relay connections, to ensure smooth power transmission.