ASIC Battery Equalization Chip With Integrated MOS Switch Matrix
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional battery management systems (BMS) for large-capacity lithium batteries rely on passive equalization due to the complexity and high cost of mainstream active equalization solutions, particularly transformer-based systems, which hinder integration and efficiency.
Innovation Solution
An ASIC chip designed for active battery equalization, incorporating a power conversion module, equalization switch matrix circuit with power MOS transistors, switch control module, temperature protection module, and communication interface, facilitating efficient active equalization by controlling power MOS transistors and ensuring safe operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If transformer-based active equalization solutions are adopted, then equalization efficiency is improved, but device complexity and integration difficulty increase
Solution Approach 1:
The patent integrates the power conversion module, equalization switch matrix, control logic, and protection circuits into a single ASIC chip. This merging of previously separate components (especially replacing the external transformer-based solution) achieves high equalization efficiency while dramatically reducing structural complexity and improving integrability into battery management systems.
2Power
If independent MOS switching solution is adopted, then equalization current capability is improved, but packaging size increases and integration becomes difficult
Solution Approach 1:
Multiple power MOS transistors and their control circuits are merged into a unified ASIC chip structure with an equalization switch matrix. This integration maintains the high current capability needed for effective equalization while eliminating the packaging and integration problems associated with discrete MOS devices.
Solution Approach 2:
The ASIC chip implements a universal equalization platform that can handle different battery configurations (series/parallel connections) and equalization scenarios through programmable control logic and a reconfigurable switch matrix, making the high-current capability adaptable to various applications without requiring separate discrete components.
3Device complexity
If passive equalization is used, then circuit simplicity and low cost are achieved, but equalization efficiency deteriorates especially for large-capacity batteries
Solution Approach 1:
The patent replaces the passive resistive equalization mechanism with an active switching-based equalization system implemented in ASIC. This substitution uses electronic switching (MOS transistors controlled by digital logic) instead of passive resistance, achieving high equalization efficiency for large-capacity batteries while maintaining circuit simplicity through integration.
Data Source
AI summary
An ASIC chip for performing active battery equalization is provided. The ASIC chip for performing active battery equalization includes: a power conversion module, an equalization switch matrix circuit module comprising a power MOS transistor, a switch control module, a temperature protection module, and a communication interface module. By connecting and controlling the above modules, the equalization switch matrix circuit module performs equalization on a battery in the battery pack. That is, the use of the integrated ASIC chip accelerates and facilitates the BMS solution manufacturers adding the active equalization function, and facilitates the BMS Battery management system effectively improving the service performance and life of lithium batteries.