Battery Pack Cell Switching With Priority-Based Chained Lists
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Solution Overview
Problem
Existing battery systems face challenges in dynamically adjusting cell connections to follow set points while accounting for priority classifications that change over time, particularly due to variations in cell states and potential failures, which can lead to disturbances in control signal transmission.
Innovation Solution
A method involving a master control circuit that uses chained lists to manage cell connections and disconnections, with pointers updating based on priority changes, allowing for efficient cell selection and disconnection to maintain optimal operating conditions and minimize disturbances during set point changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the master control circuit dynamically adjusts cell connections to follow set points while accounting for priority classifications, then the battery system can maintain optimal operation and balance cell states, but control signal transmission experiences disturbances due to frequent updates in priority classifications
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing multiple priority classifications in memory before they are needed. When a priority classification changes, the system can immediately retrieve the pre-calculated chained list without waiting for recalculation, thus maintaining control signal stability while adapting to changes. This is evident in the memory storage structure that holds both the priority classification and its corresponding chained list in advance.
Solution Approach 2:
The system implements dynamics by making the chained list structure adaptable to changing priority classifications. The chained list is dynamically updated to reflect current priority conditions, allowing the control circuit to efficiently select cells for connection or disconnection based on real-time battery state while maintaining operational stability through structured data organization.
2Productivity
If the system frequently updates cell selection to maintain optimal operation and balance cell states, then energy delivery efficiency improves, but the complexity of managing cell connections and disconnections increases
Solution Approach 1:
The patent introduces an intermediary data structure (the chained list) that mediates between the complex cell management requirements and the control execution. The chained list organizes cell identifiers in priority order, serving as an intermediary representation that simplifies the selection process. This structure allows the control circuit to efficiently manage cell connections without directly handling the full complexity of battery state monitoring and cell balancing calculations.
Solution Approach 2:
The system segments the cell management task into distinct components: priority classification determination, chained list construction, and control signal generation. By dividing the management process into these separate functional segments, the system can optimize each component independently while maintaining overall efficiency in cell connection management.
Data Source
AI summary
A method of controlling a battery including a first control circuit and a plurality of modules arranged in series between first and second terminals. Each module includes, between third and fourth terminals, electric cells and switches and a second switch control circuit. The battery further includes at least one first data transmission bus coupling the first control circuit to each second control circuit, the first control circuit including a memory having chained lists stored therein. Each chained list includes elements each including an identifier of one of the electric cells and at least one first pointer designating another element in the chained list.