Autonomous Battery Balancing via Management Network Bus
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Solution Overview
Problem
Conventional battery monitoring systems require additional wiring for each battery cell, which is cumbersome and inefficient, especially in battery packs with active balancing techniques, and lack autonomous balancing and communication capabilities.
Innovation Solution
A battery system with a management network connected to a communication bus that operates in balancing and communication modes, using management cells with switch elements and local control systems to autonomously balance and monitor battery conditions, and communicate with a main controller via a communication bus.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional monitoring of each battery cell is implemented, then safety monitoring capability is improved, but wiring complexity and device complexity increase
Solution Approach 1:
The communication bus is designed to serve dual purposes: it enables both safety monitoring of individual battery cells and active balancing operations. By making the communication bus multi-functional, the patent eliminates the need for separate dedicated monitoring wiring, thereby reducing wiring complexity while maintaining comprehensive safety monitoring capability across all battery cells.
2Duration of action of stationary object
If active balancing techniques are implemented, then storage capacity and life cycle are improved, but device complexity increases
Solution Approach 1:
The battery management system implements autonomous balancing where individual battery cells or modules automatically perform balancing operations on themselves based on local voltage measurements and control logic. This self-service approach eliminates the need for complex centralized control circuitry, reducing device complexity while still achieving effective active balancing to extend life cycle and storage capacity.
Solution Approach 2:
The battery pack is divided into multiple independent battery modules, each with its own local control capability. This segmentation allows each module to perform autonomous balancing operations independently, reducing the overall system complexity by distributing control functions rather than requiring a complex centralized balancing system.
3Productivity
If autonomous balancing capability is added, then productivity and efficiency are improved, but device complexity increases
Solution Approach 1:
The system implements dynamic balancing control where balancing operations are automatically adjusted based on real-time battery state measurements. The local control logic dynamically determines when and how to perform balancing, enabling efficient autonomous operation without requiring complex static control circuits. This dynamic approach achieves high balancing efficiency while keeping device complexity manageable through simple adaptive control logic.
Data Source
AI summary
An apparatus for communication and balancing in a battery system includes a battery pack connected to a management network. The management network is configured to communicate with a master controller via a communication bus. The apparatus is configured to operate in a communication mode and a balancing mode.