Cell Balancing System with Multiple Controllers
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Solution Overview
Problem
Conventional cell balancing systems are costly and require complex code and processes due to the need for a single-chip microcomputer to control multiple cell modules, making them inefficient for balancing multiple sets of cells.
Innovation Solution
A cell balancing system utilizing multiple controllers, where each controller manages a set of cells coupled in series, with a common cell serving as a reference for balancing, eliminating the need for an extra microcomputer and simplifying the control processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If a single-chip microcomputer is used to control all modules for balancing cells, then centralized control is achieved, but system cost and code complexity increase significantly
Solution Approach 1:
The patent divides the cell balancing system into multiple independent balancing units, each with its own controller. Each controller manages a specific set of cells autonomously, eliminating the need for a single complex microcomputer. This segmentation reduces overall system cost and code complexity while maintaining effective control through distributed architecture.
2Measurement precision
If a common cell is used as reference for multiple cell sets, then balancing accuracy is improved, but measurement complexity increases
Solution Approach 1:
The patent makes the common cell serve multiple functions simultaneously - it acts as a reference cell for multiple different cell sets and can be monitored by multiple controllers. This multi-functionality improves balancing accuracy across all cell sets without requiring separate reference cells for each group, thereby avoiding increased measurement complexity.
Data Source
AI summary
In one embodiment, a cell balancing system includes a first controller for controlling cell balancing of a first set of cells coupled in series, and a second controller for controlling cell balancing of a second set of cells coupled in series. There is at least one common cell in the first set of cells and the second set of cells.