Back-to-Back Battery Module Layout for Higher Capacity in Limited Height
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Solution Overview
Problem
Stacking multiple 12 V battery cells in a vertical direction increases the height of the cell sets, making it difficult to install them on electrical devices, particularly in electric vehicles where space is limited.
Innovation Solution
A battery module design featuring two cell sets positioned back to back with laterally extending poles, electrically connected by a CCS assembly that facilitates electrical conduction, temperature, and voltage collection, while optimizing space usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If multiple single cells are stacked in a vertical stacking direction to increase battery capacity, then the power supply capacity increases, but the height of the cell sets increases making installation difficult
Solution Approach 1:
The patent transitions from a single vertical stacking direction to a three-dimensional arrangement by positioning two cell sets back-to-back with lateral pole extension. This dimensional change allows power capacity to increase through both cell quantity and spatial configuration, while the height in the stacking direction is constrained and optimized for installation purposes.
Solution Approach 2:
The battery module is divided into two separate cell sets positioned back-to-back, with each cell set having its own CCS assembly. This segmentation allows independent optimization of each cell set's height while achieving greater total power capacity through the combined configuration, resolving the contradiction between power capacity and installation-friendly height.
2Power
If two cell sets are positioned back to back with lateral pole extension, then power supply capacity increases without excessive height, but the CCS assembly structure becomes more complex
Solution Approach 1:
The CCS assembly is designed to simultaneously perform multiple functions: electrical conduction between cell sets, temperature monitoring, and voltage collection. By merging these functions into a single integrated assembly that extends along the peripheral direction, the patent reduces overall system complexity despite the back-to-back cell configuration.
Solution Approach 2:
The CCS assembly serves multiple purposes within a single structural element: it provides electrical connection between the two cell sets, collects temperature data from both cell sets, and performs voltage collection. This multi-functionality eliminates the need for separate components, thereby reducing structural complexity while supporting the back-to-back cell arrangement.
3Area of stationary object
If the CCS assembly extends in the stacking direction of single cells, then lateral space is fully utilized, but the assembly complexity increases
Solution Approach 1:
The CCS assembly is oriented to extend along the peripheral direction (lateral dimension) rather than the stacking direction, and vertically between the back-to-back cell sets. This dimensional reorientation maximizes lateral space utilization while maintaining a relatively simple linear structure that avoids excessive complexity.
Data Source
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AI summary
Disclosed is a battery module in the present disclosure. The battery module includes: two cell sets provided back to back, poles of the cell sets extending out laterally; and a CCS assembly 100, electrically connected to each of the two cell sets, so as to realize electrical conduction between the two cell sets, and to realize temperature and voltage collection of each of the cell sets. The CCS assembly is arranged along a circumferential direction of the two cell sets and extends in a stacking direction of the single cells in each of the cell sets.