Battery Management Circuit With Full Shutoff Wake-Up Control
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Solution Overview
Problem
Existing battery management systems in power tools fail to fully turn off when not in use, leading to continued battery power consumption and potential inability to recharge due to low voltage, reducing the battery's usable life and user experience.
Innovation Solution
A battery management circuit with a main control module, logic control module, and power control module that selectively turns off power to the main control module when not in use, using a logic-enable signal threshold to prevent mistaken reconnection and reduce energy consumption, and includes a wake-up module for user-triggered power restoration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the battery management system enters a low-power mode when the power tool is out of use, then the energy consumption of the battery is reduced, but the main control chip and other functional modules still remain connected to the battery and consume battery power
Solution Approach 1:
The patent segments the battery management system into multiple independent modules: main control module, logic control module, and power control module. Each module can be independently controlled to be connected or disconnected from the battery, allowing selective power management. The logic control module specifically controls the connection state of the main control module to the battery, enabling the system to completely disconnect non-essential modules during low-power mode while maintaining minimal battery consumption.
2Speed
If the main control chip remains connected to the battery in low-power mode, then the system can quickly respond when the power tool is used again, but the battery power continues to be consumed
Solution Approach 1:
The patent implements preliminary action by having the logic control module detect when the power tool transitions to a low-power state and proactively disconnect the main control module from the battery before significant power consumption occurs. The module also prepares for quick reconnection by maintaining the ability to rapidly restore power connection when the power tool is activated again, thus achieving both energy savings and fast response through pre-planned connection/disconnection sequences.
3Loss of energy
If the battery management system completely turns off power to the main control module, then battery power consumption is minimized, but the system may take longer to become operational again
Solution Approach 1:
The patent implements periodic action through the logic control module, which continuously monitors the operational state of the power tool and periodically adjusts the connection state of the main control module to the battery. When the power tool is inactive, the logic control module disconnects the main control module to minimize power consumption. When the power tool becomes active again, the logic control module rapidly reconnects the main control module, creating a periodic on-off pattern that balances energy savings with operational readiness.
Data Source
AI summary
A battery management circuit a logic control module configured to output a power control signal in response to receiving a logic-enable signal, and to skip outputting a power control signal in response to receiving no logic-enable signal; a power control module configured to turn on the power supply from a battery to the main control module in response to receiving a power control signal from the logic control module, and to turn off the power supply from the battery to the main control module in response to receiving no power control signal from the logic control module; a main control module configured to send a logic-enable signal to the logic control module when powered from a battery, and to skip sending the logic-enable signal to the logic control module when in a first predetermined state.