Segmented Battery Module Layout for Low-Voltage Cell Blocks
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Solution Overview
Problem
As the number of cells in battery modules increases to meet demand for large-capacity structures, the module voltage also rises, necessitating enhanced safety measures and more stringent inspection apparatus specifications during production, handling, and transportation, which increases production costs.
Innovation Solution
A battery module design where multiple cell blocks, each containing a battery cell assembly and terminal busbars, are housed within a module frame without electrical connection between cell blocks, thereby maintaining a lower terminal voltage even with increased cell counts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the number of cells in the battery module is increased to meet demand for large-capacity structures, then the charge/discharge capacity is improved, but the module voltage rises necessitating enhanced safety measures and more stringent inspection apparatus specifications
Solution Approach 1:
The battery module is divided into multiple cell blocks, where each cell block contains a subset of battery cells (e.g., 2 cells per cell block). These cell blocks are electrically isolated from each other within the module, meaning no electrical connection exists between different cell blocks. This segmentation allows the module to achieve large capacity by including multiple cell blocks while maintaining lower voltage within each isolated cell block, thereby resolving the contradiction between capacity and safety.
2Quantity of substance
If the number of cells in the battery module is increased to meet demand for large-capacity structures, then the charge/discharge capacity is improved, but the inspection apparatus specification needs to be enhanced increasing production cost
Solution Approach 1:
By segmenting the battery module into multiple electrically isolated cell blocks, the inspection apparatus only needs to handle and inspect lower voltage cell blocks individually rather than a single high-voltage module. This reduces the specification requirements and cost of inspection equipment while still achieving the desired large capacity through the aggregation of multiple cell blocks.
3Power
If the voltage of the electrode module is higher, then the output voltage is improved, but it is necessary to ensure higher safety during production, handling, and transportation
Solution Approach 1:
The module architecture segments the battery cells into multiple electrically isolated cell blocks. Each cell block maintains low voltage internally, eliminating safety risks associated with high voltage during production, handling, and transportation. The overall module achieves high output voltage through the series connection of multiple such low-voltage cell blocks at the module level, thus resolving the contradiction between output voltage and safety.
Solution Approach 2:
The module frame serves as an intermediary structure that houses multiple cell blocks and provides electrical isolation between them. This intermediary framework enables the system to achieve high voltage output through external series connection of cell blocks while maintaining low voltage conditions within each isolated cell block during manufacturing and handling processes.
Data Source
AI summary
A battery module according to one embodiment of the present disclosure may include a cell block including a battery cell assembly containing one or more battery cells and a pair of terminal busbars connected to the battery cell assembly to electrically connect the battery cell to an external device, and a module frame for housing the cell block. Two or more of the cell blocks may be contained in the module frame. The two or more cell blocks may not be electrically connected to each other within the module frame.