Center Busbar Battery Module for Higher Energy Density
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Solution Overview
Problem
Existing battery modules and packs face challenges in maximizing energy density and minimizing weight due to inefficient connection methods between internal battery cells.
Innovation Solution
A battery module design featuring a center busbar assembly that connects first and second battery cell stacks perpendicularly, forming a double cell structure through electrode leads, with spacers and terminal busbars to enhance stability and electrical connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional battery modules arrange battery cells in a single stack configuration, then the structure is simple and easy to manufacture, but the space utilization is low and energy density is reduced
Solution Approach 1:
The patent transitions from a single linear stack configuration to a three-dimensional arrangement with first and second battery cell stacks positioned at different locations. The center busbar assembly connects these stacks in a perpendicular orientation, creating a spatial configuration that maximizes space utilization within the battery module while improving energy density.
2Weight of moving object
If battery cells are connected using traditional connection methods, then the manufacturing process is straightforward, but the weight of the battery module increases
Solution Approach 1:
The center busbar assembly integrates multiple functions into a single component: it provides electrical connection between battery cells, serves as a structural support element, and enables the perpendicular stacking configuration. This merging of functions reduces the total number of separate components needed, thereby reducing overall weight while maintaining manufacturing feasibility.
3Volume of stationary object
If battery cell stacks are arranged perpendicular to each other, then space utilization improves and energy density increases, but the connection structure becomes more complex
Solution Approach 1:
The center busbar assembly is designed as a universal component that simultaneously performs electrical connection, structural support, and spatial organization functions. This multi-functionality allows the perpendicular arrangement of battery cell stacks to achieve improved space utilization without requiring additional separate components for each function, thereby managing complexity.
Data Source
AI summary
A battery module according to one embodiment of the present disclosure includes a battery cell stack including a first battery cell stack and a second battery cell stack in which a plurality of battery cells are stacked; and a center busbar assembly located between the first battery cell stack and the second battery cell stack. The first battery cell stack and the second battery cell stack are disposed along a direction perpendicular to the direction in which the battery cells in the first battery cell stack or the second battery cell stack are stacked. Any one battery cell included in the first battery cell stack and any one battery cell included in the second battery cell stack are electrically connected through a center busbar included in the center busbar assembly to form a double cell structure, and the battery cell stack includes at least one double cell structure.