Battery Pack Control Circuit Sleep Switching After Charger Silence
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Solution Overview
Problem
Rechargeable battery packs continue to consume power wastefully after charging is complete if they remain connected to a charger, as the control part does not enter a low-power mode, leading to unnecessary energy expenditure.
Innovation Solution
A battery pack with a control part that can switch between controlled-operation and low-power operation states, using a switching-control part to compare communication-stop time with a predetermined state-switching determination value to transition to low-power mode when no communication is detected, reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the control part continues normal operation after charging completion, then the battery pack can respond quickly to charger commands, but charging power stored in the battery cell is wastefully consumed
Solution Approach 1:
The control part dynamically switches between normal operation mode and low power mode based on communication status. When no communication is detected for a threshold period, the system transitions from high-power normal operation to low-power sleep mode, making the power consumption adaptable to actual operational needs rather than static
Solution Approach 2:
The system employs periodic communication checks to determine whether to maintain normal operation or switch to low power mode. The communication-stop time counter increments periodically, and when it exceeds the threshold, the mode switch is triggered, creating a periodic assessment mechanism that balances responsiveness with energy conservation
2Loss of energy
If the control part switches to low-power mode immediately after charging completion, then power consumption is reduced, but communication responsiveness may be delayed
Solution Approach 1:
The system performs preliminary communication checks before switching to low-power mode. By monitoring communication status for a threshold period (communication-stop time) before actually transitioning modes, the system ensures that brief communication interruptions don't trigger premature mode switches, maintaining responsiveness while enabling power savings
Data Source
AI summary
A battery pack includes one or more battery cells, a control circuit, a communication circuit, and a switching control circuit. The switching control circuit is configured to switch the control circuit from a controlled-operation state to a low-power operation state in response to a communication-stop time exceeding a state-switching threshold, the communication-stop time being a duration of a state in which the control circuit or the communication circuit detects no communication with the charger, and the state-switching threshold being determined in advance, so that power consumption of the control circuit can be reduced upon completion of a charging operation.