Battery Pack Configuration Updates After Failure Cell Isolation
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Solution Overview
Problem
Battery management systems face reduced management accuracy when the connection relationship between cells in a battery pack changes due to a failure cell being isolated, leading to erroneous operations and compatibility issues.
Innovation Solution
A battery management system and method that involves transmitting original configuration information to a processing device to generate adjusted configuration information, which includes the identification of the failure cell, allowing the system to perform accurate management operations on unfailing cells by adjusting performance parameters and collecting state parameters, thereby ensuring accurate management and extending the life of the battery pack.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the BMS continues to use original configuration information after a failure cell is isolated, then the system structure remains simple, but the management accuracy of the BMS deteriorates due to erroneous operations
Solution Approach 1:
The configuration information is made dynamic and adjustable based on the actual state of the battery pack. When a failure cell is isolated, the BMS dynamically updates the configuration information to reflect the changed connection relationship between cells, ensuring management accuracy without requiring a completely new system design
Solution Approach 2:
The patent changes the parameters of configuration information (such as connection relationships, cell identifiers, and management parameters) according to the actual state of the battery pack. By updating these parameters when cells are isolated or connected, the system maintains high management accuracy while using a relatively simple BMS structure
2Adaptability or versatility
If the BMS adapts to connection relationship changes, then the adaptability improves, but the device complexity increases due to additional detection and adjustment mechanisms
Solution Approach 1:
The BMS implements a feedback mechanism where it continuously monitors the actual state of the battery pack (including cell connection relationships and failure states) and uses this feedback to automatically adjust configuration information. This allows the system to adapt to connection changes without requiring complex manual intervention or additional hardware mechanisms
Solution Approach 2:
The BMS performs self-adjustment of configuration information based on detected changes in the battery pack structure. The system automatically identifies when cells are isolated or reconnected and updates its own configuration parameters accordingly, eliminating the need for external intervention or complex adaptive mechanisms
3Measurement precision
If the BMS uses updated configuration information, then the management precision improves, but the loss of time increases due to configuration updates
Solution Approach 1:
The BMS performs preliminary detection of cell states and connection relationships, and prepares configuration information updates in advance. When changes are detected, the system can quickly apply pre-calculated configuration adjustments, reducing the time penalty associated with updates while maintaining high management precision
Data Source
AI summary
The present application discloses a battery management system, a processing device, a battery management method, and a battery management and control system. The battery management system includes: an information transmission module configured to transmit, under a condition that it is determined that a connection relationship between unfailing cells of a target battery pack changes when a target failure cell in the target battery pack is isolated, original configuration information of the target battery pack to a processing device, so that the processing device generates adjusted configuration information according to the original configuration information; an information reception module configured to receive the adjusted configuration information transmitted by the processing device, wherein the adjusted configuration information includes an identification of the target failure cell; a management module configured to perform management operations on the unfailing cells of the target battery pack according to the adjusted configuration information.