Vehicle Power Supply Circuit With Backup Switch Control
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Solution Overview
Problem
Ensuring a stable power supply to vehicle loads, such as dashboards and control panels, is crucial for maintaining driving safety, but existing technologies struggle to maintain this stability, especially when the vehicle is in a power-on state.
Innovation Solution
A power supply circuit with a dual control guarantee mechanism, comprising a switch circuit, a first control circuit, a detection circuit, and a second control circuit, which ensures that the loads receive a stable power supply by detecting the normal operation of the first control circuit and triggering the second control circuit to maintain the switch circuit in an on state if the first control circuit fails.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single control circuit is used to control the switch circuit, then the device complexity is reduced, but the reliability of power supply deteriorates because the load may lose power if the control circuit fails
Solution Approach 1:
The control system is divided into two independent control circuits: a first control circuit for normal operation and a second control circuit for backup. Each control circuit independently controls the switch circuit, ensuring that if one fails, the other can take over to maintain power supply to the load.
Solution Approach 2:
The detection circuit continuously monitors the operation status of the first control circuit in advance. When abnormality is detected, the system proactively switches to the second control circuit before complete failure occurs, preventing power interruption to the load.
2Reliability
If a detection circuit is added to monitor the first control circuit, then the reliability improves, but the device complexity increases
Solution Approach 1:
The first control circuit performs self-diagnosis through the detection circuit that monitors its own operation status. This self-monitoring capability enables the system to detect abnormalities and switch to backup control without requiring external intervention or complex additional monitoring systems.
3Reliability
If the second control circuit is activated as backup, then the power supply stability improves, but the ease of operation deteriorates due to automatic switching complexity
Solution Approach 1:
The detection circuit provides continuous feedback on the operation status of the first control circuit. Based on this feedback, the system automatically determines when to switch to the second control circuit, ensuring stable power supply without requiring manual intervention or complex user decisions.
Data Source
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AI summary
A power supply circuit for stably supplying power to loads of a vehicle comprises a battery pack, a switch circuit, a first control circuit, a detection circuit, and a second control circuit. The first control circuit is configured to output a first control signal to turn on the switch circuit and the battery pack can supply power to the loads when the vehicle is in a first state. The detection circuit is configured to detect whether the first control circuit normally outputs the first control signal during the first state and output a trigger signal to the second control circuit in response to the first control circuit does not output the first control signal. The second control circuit outputs a second control signal according to the trigger signal to control the switch circuit to be turned on. A power supply method and the vehicle are also disclosed.