Charge/Discharge Control Circuit Power-Down Release Mechanism
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Solution Overview
Problem
Existing battery devices require connection of a battery charger to external terminals to release a power-down state, preventing current supply to a load even when the battery voltage is restored after an overdischarge event.
Innovation Solution
A charge/discharge control circuit with a power-down release terminal and a power-down release pulse generation circuit that generates a pulse or signal to release the power-down state without connecting a battery charger, allowing current supply from the secondary battery to the load.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If the battery device enters a power-down state after overdischarge to reduce power consumption, then power consumption is reduced, but the device cannot supply current to the load even when battery voltage is restored
Solution Approach 1:
The patent introduces a power-down release terminal and a power-down release pulse generation circuit as intermediary components. When a power-down release signal is input to this terminal, the circuit generates a power-down release pulse that triggers the control circuit to exit the power-down state and resume normal operation, thereby enabling current supply to the load without requiring a battery charger connection
2Reliability
If a battery charger must be connected to release the power-down state, then the battery device can resume operation, but the user cannot utilize the restored battery voltage without external charging equipment
Solution Approach 1:
The patent enables the battery device to self-release from the power-down state by providing a power-down release terminal that accepts a simple release signal. The power-down release pulse generation circuit automatically generates the necessary release pulse when triggered, allowing the device to resume operation using its own internal circuitry without requiring external charging equipment, thus achieving self-service capability
Data Source
AI summary
A charge/discharge control circuit includes: a first power supply terminal connected to a first electrode of a secondary battery; a second power supply terminal connected to a second electrode of the secondary battery; a control circuit configured to control charge/discharge of the secondary battery; and a power-down release pulse generation circuit connected to the power-down release terminal, the power-down release pulse generation circuit being configured to supply, in a power-down state of the charge/discharge control circuit, a power-down release pulse at least to the control circuit in response to an input of a power-down release signal to the power-down release terminal to release the power-down state.