Flexible Wiring Battery Pack for State Monitoring
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Solution Overview
Problem
Large devices such as electric vehicles require battery modules with increased power and capacity, necessitating a solution for efficiently monitoring and managing state information across multiple battery cells within a compact and efficient battery pack structure.
Innovation Solution
A battery pack design featuring a cell block with flexible wiring that surrounds the battery cells to detect state information, including voltage and temperature, through conductive and thermal contact with tab plates and lateral surfaces, while also incorporating a cooling plate and circuit board for enhanced monitoring and cooling efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If battery modules include a plurality of batteries to increase power and capacity, then the power and capacity requirements are met, but the complexity of monitoring and managing state information across multiple battery cells increases
Solution Approach 1:
The battery module is divided into multiple battery cells arranged in a structured configuration, with each cell having dedicated monitoring points. The state information monitoring is segmented across multiple detection positions distributed throughout the battery module, allowing complex monitoring to be broken down into simpler, localized measurements that are then aggregated.
Solution Approach 2:
The battery module design integrates multiple functions into a unified structure: the housing provides both mechanical support and protection, the tab plates serve both electrical connection and structural purposes, and the monitoring system simultaneously tracks voltage, temperature, and other state parameters across all cells through a coordinated sensor network.
2Measurement precision
If flexible wiring surrounds the cell block to detect state information from multiple battery cells, then monitoring effectiveness is improved, but the device complexity increases
Solution Approach 1:
The patent employs flexible wiring that can conform to the contours of the battery cell block, allowing the wiring to wrap around and contact multiple cells without requiring rigid, complex structural support. This flexible approach enables comprehensive state information collection from multiple cells while maintaining a relatively simple wiring architecture that adapts to the battery geometry.
Solution Approach 2:
The flexible wiring integrates multiple detection functions into a single continuous structure that simultaneously contacts multiple battery cells. By combining voltage detection, temperature monitoring, and structural support functions into one integrated wiring assembly, the design achieves comprehensive monitoring without proportionally increasing overall system complexity.
3Reliability
If a cooling plate and circuit board are incorporated for enhanced monitoring and cooling, then thermal management and safety are improved, but the volume and device complexity increase
Solution Approach 1:
The cooling plate and circuit board are nested within the existing battery module structure, with the cooling plate positioned between the battery cells and the housing, and the circuit board integrated into the same space. This nested arrangement allows thermal management and monitoring functions to be added without proportionally increasing the overall battery pack volume, as these components utilize otherwise unused spaces within the module architecture.
Solution Approach 2:
The cooling plate serves multiple functions: it provides thermal management by dissipating heat from the battery cells, acts as a structural support element, and facilitates thermal coupling between cells for uniform temperature distribution. The circuit board similarly integrates monitoring, control, and communication functions. This multi-functionality reduces the need for separate dedicated components, thereby minimizing volume increase while improving reliability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design allows for effective collection of state information from multiple battery cells, improving monitoring and cooling efficiency, thereby enhancing the safety and performance of large battery packs.
Implementation Method 1
the flexible wiring may make, at temperature detection positions, thermal contact with the lateral surfaces of the group of battery cells
Implementation Method 2
the flexible wiring may make, at voltage detection positions, conductive contact with a tab plate which electrically connects the group of battery cells to each other
Data Source
AI summary
A battery pack includes a cell block including battery cells electrically connected to each other, the cell block having a pair of long sides and a pair of short sides which surround lateral surfaces of the battery cells and are tangent to the lateral surfaces of the battery cells, and a flexible wiring surrounding the cell block in a direction parallel to the pair of long sides of the cell block, the flexible wiring including sensors to detect state information from the battery cells.