Battery Management IC Integration for Protection and Cell Equalization
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Solution Overview
Problem
Existing battery management systems for lithium battery packs are complex and costly due to separate protection and equalization systems, which lead to inefficiencies in maintaining cell consistency and prolonging battery life.
Innovation Solution
A battery management system integrating a dedicated IC with both protection and equalization modules, utilizing sampling circuits to collect parameters and output control signals for protection and equalization functions, reducing circuit complexity and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate protection system and equalization system are used, then protection function and equalization function can be realized, but circuit design becomes complex and cost increases
Solution Approach 1:
The patent combines the protection system and equalization system into a single integrated battery management system. The control unit receives battery parameters from sampling circuits and simultaneously performs both protection control and equalization control, merging two separate systems into one unified system that reduces circuit complexity while maintaining both functions.
Solution Approach 2:
The control unit is designed with multi-functionality, serving both as a protection controller and an equalization controller. It processes battery parameters and executes both protection logic and equalization logic, making a single component perform multiple functions that previously required separate systems.
2Reliability
If separate protection system and equalization system are used, then protection function and equalization function can be realized, but cost increases
Solution Approach 1:
The patent merges separate protection and equalization systems into one integrated system, reducing the total number of components needed. This consolidation lowers manufacturing costs by eliminating redundant elements while preserving both protection and equalization capabilities.
3Reliability
If separate protection system and equalization system are used, then protection function and equalization function can be realized, but number of components increases
Solution Approach 1:
The patent integrates protection and equalization functions into a single system, significantly reducing the number of components. Instead of having separate protection circuits and equalization circuits with their own components, one unified system performs both functions, reducing component quantity.
Solution Approach 2:
The control unit is designed as a multi-functional component that handles both protection control and equalization control. This universal component replaces what would otherwise require multiple specialized components, reducing the overall component count in the system.
Data Source
AI summary
The present disclosure provides a battery management system with protection and equalization functions including a dedicated battery management IC, a plurality of sampling circuits and a plurality of execution circuits. A battery protection module and an equalization module are integrated in the dedicated battery management IC. The sampling circuits and the execution circuits are coupled between the dedicated battery management IC and a lithium battery pack, respectively. The sampling circuit collects parameters including voltage, charge-discharge current and battery temperature of the lithium battery pack and inputs them into the dedicated battery management IC for analysis and processing. The dedicated battery management IC outputs control signals to the execution circuits according to a result of the analysis and processing of the parameters, to control the execution circuits to perform battery protection function and voltage equalization function of the lithium battery pack.