Battery Cell Switching for Flexible Circuit Topologies
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Solution Overview
Problem
Existing battery systems lack the flexibility to adapt to varying power demands and requirements, as they primarily allow control at the module or overall battery level, limiting the ability to control individual energy flows and interconnect battery cells in diverse configurations.
Innovation Solution
The battery system integrates switching elements and bridging switching elements within each battery cell housing, enabling decentralized control and the formation of various circuit configurations through a control device that activates these elements and external switches, allowing for flexible interconnection of battery cells and modules in series or parallel circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If battery cells are controlled only at module or overall battery level, then the control system is simpler, but the flexibility to adapt to varying power demands and requirements is limited
Solution Approach 1:
The patent segments the battery system control into three hierarchical levels: cell level (individual battery cells with switching elements), module level (groups of cells), and overall battery level. This segmentation enables flexible adaptation at the cell level while maintaining manageable complexity through hierarchical organization, directly resolving the contradiction between adaptability and control system complexity.
Solution Approach 2:
The patent implements dynamic reconfigurability by allowing the battery system to change its circuit configuration (series, parallel, or combinations) in real-time based on power demands and operational requirements. The control device can dynamically activate or deactivate individual cells or modules, enabling the system to adapt its structure and performance characteristics dynamically rather than being fixed.
2Measurement precision
If switching elements are integrated within each battery cell housing, then control precision at cell level is improved, but device complexity increases
Solution Approach 1:
The patent merges the switching element, bypass branch, and control unit directly into the battery cell housing, creating an integrated cell module. This merging achieves precise cell-level control by placing the control mechanism at the exact location where it is needed, while the integration approach minimizes the increase in overall complexity by combining multiple functions within a single housing structure.
Solution Approach 2:
Each battery cell becomes self-contained with its own switching element and control unit, enabling independent operation and control of individual cells. This self-service capability allows precise monitoring and control at the cell level, with each cell able to be activated, deactivated, or bypassed independently based on its specific operational status and requirements.
3Reliability
If bypass branch is added to each battery cell housing, then reliability through redundant power supply is improved, but manufacturing complexity increases
Solution Approach 1:
The bypass branch is pre-integrated into the battery cell housing during manufacturing, establishing the redundant power supply pathway before the cell is put into service. This preliminary action ensures that the reliability enhancement is built-in from the start, and the standardized integration approach facilitates manufacturing by making the bypass branch a standard component of the cell housing design.
Solution Approach 2:
The bypass branch serves as a pre-prepared protective pathway that can be activated in advance or immediately when a cell defect is detected. This beforehand cushioning mechanism provides immediate redundancy protection, allowing the system to bypass defective cells and maintain operation, thereby enhancing reliability while the standardized design helps manage manufacturing complexity.
4Adaptability or versatility
If multiple circuit configurations are enabled through cell-external circuit arrangement, then versatility to meet different requirements is improved, but control complexity increases
Solution Approach 1:
The cell-external circuit arrangement enables dynamic reconfiguration of the battery system into multiple circuit configurations (series, parallel, or combinations) based on real-time power demands and operational requirements. The control device can dynamically switch between different configurations by activating or deactivating specific cells or modules, providing high versatility while managing control complexity through automated control algorithms.
Data Source
AI summary
A battery system, including multiple battery cells, each of which have respective battery cell housings with electrical terminals via which the multiple battery cells are electrically connected to one another, wherein a cell branch connecting the electrical terminals to a galvanic cell and a bypass branch for bridging the galvanic cell are arranged in each of the respective battery cell housings, each cell branch having a switching element for opening and closing the cell branch and each bypass branch having a bridging switching element for opening and closing the bypass branch.