Battery Cell Recessed Busbar Layout for Higher Space Utilization
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Solution Overview
Problem
The challenge of improving space utilization in battery cells to accommodate increased capacity without increasing the physical size, which is necessary for fast charging in electric vehicles.
Innovation Solution
A battery design featuring recessed edges on battery cells to accommodate electrode terminals and busbars that bypass the side walls of adjacent cells, allowing for efficient electrical connections without occupying additional space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the capacity of battery cell is increased to support fast charging, then the energy storage capability is improved, but the physical size of battery cell increases requiring larger accommodating space
Solution Approach 1:
The electrode terminal is nested within the recessed cavity formed by the recessed edge of the battery cell. The busbar is positioned within the same recessed cavity, utilizing the recessed space to accommodate these components. This nesting arrangement allows the battery cell to maintain a compact external dimensions while providing sufficient internal capacity and space for electrical connections.
Solution Approach 2:
The edge of the battery cell is recessed to form a three-dimensional cavity structure. This dimensional change creates an additional internal space without increasing the external footprint of the battery cell. The recessed cavity provides a dedicated space for housing the electrode terminal and busbar, effectively utilizing vertical space to reduce the need for horizontal expansion.
2Reliability
If the electrode terminal and busbar are connected using conventional methods, then the electrical connection is established, but the components occupy extra space reducing space utilization
Solution Approach 1:
The recessed cavity serves multiple functions simultaneously: it houses the electrode terminal, accommodates the busbar, and provides structural support for the electrical connection. By merging these functions into a single integrated structure, the design eliminates the need for separate mounting spaces for each component, thereby improving space utilization while maintaining reliable electrical connections.
Solution Approach 2:
The busbar is positioned within the recessed cavity that already houses the electrode terminal. This nested arrangement allows both components to share the same spatial envelope, reducing the overall space required for electrical connections and improving the density of the battery cell design.
Data Source
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AI summary
Embodiments of this application provide a battery, an electric device, and a method and a device for preparing battery cell, featuring a higher space utilization. The battery includes: a plurality of battery cells, where the plurality of battery cells are arranged in a first direction, a first region on an edge of a first surface of each of the plurality of battery cells is recessed to form a first recess, a first electrode terminal of each of the battery cells is protrusively provided on a second surface of the battery cell, the first surface and the second surface are perpendicular to the first direction, and the plurality of battery cells include a first battery cell and a second battery cell that are adjacent; and a first busbar configured to connect first electrode terminals of the adjacent first battery cell and second battery cell, where the first busbar bypasses a side wall of the second battery cell parallel to the first direction, so that a first end of the first busbar is connected to the first electrode terminal of the first battery cell and a second end of the first busbar is connected to the first electrode terminal of the second battery cell, where the first end of the first busbar and the first electrode terminal of the first battery cell are both accommodated in the first recess of the second battery cell.