Battery Control Apparatus Power Latch Mechanism Preventing Dark Current
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Solution Overview
Problem
Existing battery management systems face challenges in preventing dark current leakage, which reduces the lifespan of battery systems with limited power supplies, such as those in electric vehicles, due to the inability to effectively manage power supply disconnection and reconnection.
Innovation Solution
A battery control apparatus and method that utilize a processor, voltage regulator, and switches to regulate power supply connections, including a power latch mechanism that maintains connection for a predetermined period after power disconnection, preventing dark current by ensuring stable termination of processor operations and managing power supply cutoff.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the power supply is immediately disconnected when the driving signal is interrupted, then the dark current is reduced, but the processor operation becomes unstable due to abrupt power loss
Solution Approach 1:
The patent applies preliminary action by maintaining the power supply connection for a predetermined period after the driving signal is interrupted. This allows the processor to complete its termination process smoothly before power is actually disconnected, preventing abrupt power loss that would cause operational instability. The power latch signal ensures the switch remains in the connected state during this transition period.
Solution Approach 2:
The patent introduces a power latch signal as an intermediary mechanism between the driving signal and the actual power supply connection. This intermediate control signal manages the transition period, allowing the processor to stabilize its operation before power disconnection occurs, thus resolving the conflict between reducing dark current and maintaining operational stability.
2Reliability
If the power supply connection is maintained after driving signal interruption, then the processor operation remains stable, but dark current leakage occurs reducing battery lifespan
Solution Approach 1:
The patent implements periodic action by defining a specific time period after driving signal interruption during which the power supply remains connected. The power latch signal is generated for this predetermined period, allowing stable processor termination, after which the power connection is disconnected to prevent dark current. This time-based control resolves the contradiction by limiting power maintenance to only when necessary.
Solution Approach 2:
The power latch signal performs preliminary action by maintaining power connection in advance of the actual need to disconnect. This ensures the processor has sufficient time to complete its termination sequence smoothly, preventing operational instability, while the connection is eventually terminated to eliminate dark current leakage.
3Use of energy by stationary object
If the switch disconnects power immediately when the driving signal stops, then energy consumption is reduced, but the processor cannot complete termination processes
Solution Approach 1:
The patent uses periodic action by controlling the power latch signal to maintain the power connection for a predetermined period after the driving signal is interrupted. This time window allows the processor to complete its termination processes before power is disconnected, ensuring reliable termination while minimizing energy consumption by not maintaining power indefinitely.
Solution Approach 2:
The power latch signal provides preliminary action by maintaining power connection in advance of the final power disconnection. This ensures the processor has adequate time to complete its termination sequence, preventing abrupt power loss that would interrupt termination processes, while the connection is eventually terminated to achieve energy savings.
Data Source
AI summary
A method and apparatus for preventing dark current in a battery management system (BMS) are provided. A battery control apparatus may include a voltage regulator configured to regulate a voltage of a driving power supplied from a power supply to a processor, a first switch, located between the power supply and the voltage regulator, configured to switch on and off a connection between the power supply and the voltage regulator, and a second switch configured to control the first switch based on an input of a driving signal to operate the processor.