Battery Management Device Volume Detection Forced Discharge
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Solution Overview
Problem
Rechargeable batteries face risks of explosion due to overcharging and permanent damage from over-discharging, as existing technologies lack effective mechanisms to monitor and control charging and discharging processes.
Innovation Solution
A battery management device comprising a detection circuit, charge control circuit, and discharge control circuit that continuously monitor the battery volume, outputting control signals to stop charging and enable discharging, thereby preventing continuous expansion and improving safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If overcharging is allowed to increase battery capacity, then energy storage increases, but battery expansion and explosion risk increase
Solution Approach 1:
The patent implements a feedback mechanism where the detection circuit continuously monitors battery volume and provides real-time feedback to the charge control circuit. When the battery reaches a preset volume threshold, the system automatically stops charging, preventing overcharging-related expansion and explosion risks while maximizing safe battery capacity utilization.
Solution Approach 2:
The system performs preliminary detection of battery volume before dangerous expansion occurs. By monitoring battery volume in advance and stopping charging when the preset threshold is approached, the system prevents the harmful effects of overcharging before they can manifest, rather than reacting after damage occurs.
2Use of energy by moving object
If over-discharging is allowed to maximize energy utilization, then energy efficiency increases, but permanent damage to electrodes occurs
Solution Approach 1:
The discharge control circuit receives continuous feedback from the detection circuit regarding battery volume and discharge state. When the battery approaches dangerous discharge levels that could cause electrode damage, the system automatically stops discharging, thereby protecting electrode integrity while maximizing safe energy utilization.
3Device complexity
If simple volume detection is used to stop charging, then device complexity is reduced, but incorrect determination and false triggering occur
Solution Approach 1:
The system performs preliminary detection at multiple points before making a final determination. The multi-point detection approach collects volume information from several locations within the battery, and only when all detection points indicate excessive volume does the system stop charging. This preliminary multi-point assessment prevents false triggering while maintaining relatively simple device architecture.
4Reliability
If continuous monitoring is implemented to ensure safety, then reliability improves, but energy consumption and device complexity increase
Solution Approach 1:
The detection circuit performs periodic volume monitoring rather than truly continuous monitoring. The system checks battery volume at regular intervals during charging and discharging cycles, stopping only when the preset threshold is exceeded. This periodic approach maintains high reliability for safety while reducing energy consumption compared to truly continuous monitoring.
Data Source
AI summary
A battery management device includes a detection circuit, a charge control circuit, and a discharge control circuit. The detection circuit is configured to output a first control signal and a second control signal according to a volume of a rechargeable battery. The charge control circuit is electrically coupled to the rechargeable battery and the detection circuit, and configured to open a charge loop of the rechargeable battery according to the first control signal. The discharge control circuit is electrically coupled to the rechargeable battery and the detection circuit, and configured to close a discharge path of the rechargeable battery according to the second control signal.