Shared Electrode Terminal Layout for Multi-Pole Battery Cells
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Solution Overview
Problem
Existing large-capacity battery cells face difficulties in assembly during the manufacturing process, leading to low production efficiency and high manufacturing costs due to complex assembly procedures involving multiple electrode terminals and tab groups.
Innovation Solution
A battery cell design with pole groups comprising a main body group and two tab groups of opposite polarities, where tab groups close to each other share an electrode terminal, and those farthest apart connect to separate terminals, utilizing current collecting components to simplify assembly and reduce interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple electrode terminals are provided for each tab group in large-capacity battery cells, then electrical connection reliability is improved, but assembly complexity increases and production efficiency decreases
Solution Approach 1:
Adjacent pole groups with the same polarity share a common electrode terminal, merging multiple connection points into a single shared terminal. This reduces the total number of electrode terminals required and simplifies the assembly process while maintaining reliable electrical connections through the shared terminal structure.
Solution Approach 2:
The electrode terminal structure is designed to serve multiple functions: it provides electrical connection for multiple tab groups simultaneously, acts as a structural support element, and enables simplified assembly procedures. This multi-functional design reduces overall device complexity while maintaining connection reliability.
2Reliability
If multiple electrode terminals are provided for each tab group, then electrical connection reliability is improved, but production efficiency deteriorates
Solution Approach 1:
By merging adjacent pole groups to share common electrode terminals, the number of assembly operations is reduced. Instead of connecting each tab group to separate terminals, multiple pole groups are connected through shared terminals, significantly improving production efficiency while maintaining reliable electrical connections.
Solution Approach 2:
The battery cell is segmented into pole groups with alternating polarities, where adjacent pole groups of the same polarity share terminals. This segmentation strategy optimizes the connection architecture, reducing the total number of terminals needed and streamlining the assembly process for higher productivity.
3Reliability
If multiple electrode terminals are provided for each tab group, then electrical connection reliability is improved, but manufacturing cost increases
Solution Approach 1:
Merging adjacent pole groups to share common electrode terminals directly reduces the total number of terminals required in the battery cell. This reduction in component count lowers material costs and manufacturing expenses while the shared terminal design maintains reliable electrical connections through optimized current distribution.
Data Source
AI summary
A battery cell, a battery, an electrical apparatus, and an energy storage cabinet are disclosed. The battery cell includes a shell, multiple pole groups, and multiple electrode terminals. The shell has a wall portion, and the pole groups are received in the shell and arranged along a first direction. Each pole group includes a main body group and two tab groups, the two tab groups being spaced apart along the first direction on one side of the main body group in a second direction and having opposite polarities. The electrode terminals are disposed on the wall portion and spaced apart along the first direction. Two tab groups adjacent in the first direction from two neighboring pole groups share one electrode terminal, while the two farthest tab groups are connected to two respective electrode terminals. This configuration reduces the number of electrode terminals, optimizes production rhythm, and improves manufacturing efficiency.