Battery Pack Protection Circuit Detecting Excessive Current
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Solution Overview
Problem
Rechargeable battery packs are prone to excessive thermal energy conditions due to overcharging, overdischarging, and excessive current loads, posing safety hazards from contaminants or faulty components.
Innovation Solution
A battery pack with a protection circuit that detects excessive current consumption by comparing potentials across current sensors, interrupting current flow to prevent thermal hazards through integrated circuit logic and fuses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If rechargeable batteries are used to provide longer energy life and lighter weight, then energy efficiency and portability are improved, but the batteries become sensitive to overcharging, overdischarging, and excessive current loads causing thermal hazards
Solution Approach 1:
A protection circuit is introduced as an intermediary component between the rechargeable battery and the external environment. This protection circuit includes current sensors, integrated circuit logic, and fuses that monitor and control current flow, preventing overcharging, overdischarging, and excessive current loads that could cause thermal hazards while allowing the battery to function normally
Solution Approach 2:
The protection circuit performs preliminary detection and prevention actions before thermal hazards can develop. Current sensors continuously monitor current flow, and the integrated circuit logic anticipates dangerous conditions by comparing potentials and detecting excessive current consumption patterns, triggering fuse activation before thermal runaway occurs
2Object-affected harmful factors
If protection circuits are added to detect excessive current consumption, then safety against thermal hazards is improved, but device complexity increases
Solution Approach 1:
The protection function is extracted as a separate, dedicated circuit module rather than being integrated into the battery cells themselves. This allows the protection logic to be implemented independently using standardized components (current sensors, comparator circuits, fuses) that can be designed and manufactured separately, reducing overall system complexity while maintaining comprehensive safety functionality
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Effectively prevents excessive thermal energy conditions and safety hazards by interrupting current flow when excessive consumption is detected, ensuring safe operation of rechargeable battery packs.
Implementation Method 1
an integrated circuit adapted to compare potentials across at least two current sensors to detect an excessive current consumption condition
Implementation Method 2
The excessive thermal energy condition may also migrate to the cells of the battery pack, thereby posing a significant safety hazard
Data Source
AI summary
A battery pack comprises a protection circuit adapted to detect an excessive current consumption condition associated with electronic components forming the battery pack.