Battery Pack BMS Wake-Up Signal Power Management
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Solution Overview
Problem
Battery packs in existing systems are always in a power-on state, leading to safety issues due to user errors during connection or disconnection and causing leakage currents, resulting in self-discharge and battery degradation.
Innovation Solution
A battery management system (BMS) that determines operation modes based on switch signals, includes a power enable switch, a calculating unit, and an OR gate to generate and maintain a power enable signal, synchronizing with switch signals to control the battery pack's power state and reduce leakage currents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the battery pack is always maintained in a power-on state, then the battery management system can continuously monitor and manage the battery, but safety issues arise due to user errors during connection or disconnection and leakage currents cause self-discharge
Solution Approach 1:
The patent implements dynamic power management by transitioning the battery pack between power-on and power-off states based on operational conditions. The BMS activates only when wake-up signals are detected, allowing the system to adapt its operational state rather than remaining statically power-on, thereby eliminating safety hazards while maintaining management reliability.
Solution Approach 2:
The patent changes the operational parameter of the BMS from continuous operation to event-triggered operation. By monitoring wake-up signals and transitioning between active and inactive states, the system changes its operational parameters dynamically, ensuring safety by preventing leakage currents during idle periods while maintaining reliability when needed.
2Reliability
If the battery management system operates continuously, then it can continuously monitor battery status, but leakage current is generated causing self-discharge and battery degradation
Solution Approach 1:
The patent implements periodic action by having the BMS operate in cycles - remaining inactive during idle periods and activating only when wake-up signals are detected. This periodic operation pattern eliminates continuous leakage currents while maintaining the ability to monitor battery status when required, thereby preventing self-discharge without compromising reliability.
3Ease of operation
If the battery pack is always power-on, then it is ready for immediate use, but user errors during connection or disconnection create safety problems
Solution Approach 1:
The patent applies preliminary action by detecting wake-up signals in advance and transitioning the BMS to an active state before actual battery operations begin. This ensures the system is ready for immediate management tasks while maintaining safety by only being active when properly triggered, preventing user error-related safety issues while preserving operational readiness.
Data Source
AI summary
Disclosed is a battery pack including: at least one battery module including a plurality of battery cell; and a battery management system (BMS) configured to determine an operation mode of a battery pack according to an enabled switch signal between at least two switch signals, which wake up the battery pack, and control the battery pack according to the determined operation mode.