Battery Relay Control to Block High-Power State Reentry
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Solution Overview
Problem
Existing power supply control methods for electric vehicles do not effectively prevent the state from changing back to a high-power state after it has been released, leading to inefficient energy management.
Innovation Solution
A power supply control method that involves switching the relay from an on state to an off state and inhibiting it from switching back to the on state upon receiving a specific signal, thereby preventing the high-power state from being reactivated.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the relay is switched from on state to off state to release the high-power state, then power consumption is reduced, but the state may easily change back to high-power state again
Solution Approach 1:
The controller applies preliminary anti-action by setting a flag to inhibit the relay from switching back to the on state after it has been switched off. This prevents the high-power state from being reactivated by subsequent events, thereby maintaining energy savings and ensuring stable power supply state after release.
2Ease of operation
If events other than switch operation are used as triggers to change to high-power state, then the state can be changed relatively easily, but the state may change to high-power state again after being released
Solution Approach 1:
The controller prevents unnecessary power consumption by implementing a mechanism that blocks subsequent event-triggered transitions to high-power state after the relay has been switched off. The inhibition flag ensures that even if other events occur, the high-power state cannot be reactivated, thus eliminating wasteful energy consumption while maintaining ease of operation for intentional state changes.
Solution Approach 2:
The controller uses feedback by monitoring the relay state and setting an inhibition flag that provides feedback to the event processing logic. This feedback mechanism ensures that once the high-power state is released, the system recognizes this state change and prevents contradictory state transitions, thereby avoiding unnecessary power consumption.
3Adaptability or versatility
If the relay switching is not inhibited after turning off, then the system remains adaptable to event triggers, but energy management becomes inefficient
Solution Approach 1:
The controller applies preliminary anti-action by pre-setting an inhibition flag that blocks future relay activation attempts after the relay has been switched off. This ensures that energy management efficiency is maintained by preventing unnecessary high-power state reactivation, while the system retains full adaptability to event triggers for intentional state changes before the inhibition is set.
Solution Approach 2:
The system dynamically adjusts its responsiveness to events based on the current power supply state. When in low-power state with inhibition flag set, the system dynamically blocks certain event-triggered transitions. This dynamic behavior optimizes energy management efficiency while maintaining adaptability when appropriate, as the inhibition mechanism can be cleared to restore full event responsiveness when needed.
Data Source
AI summary
A power supply control device includes a high-power battery, a low-power battery, a relay that electrically connects the high-power battery and the low-power battery, a power supply switch, and a controller that controls an on/off state of the relay. When a power supply state is a state in which power is supplied from the high-power battery to the low-power battery with the relay therebetween, if the controller receives a first signal, the controller switches the relay from an on state to an off state, and then inhibits the relay from switching from the off state to the on state.