Battery Tab Grouping Layout for Compact Cell Connections
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Solution Overview
Problem
Existing battery designs with multiple tabs occupy significant space, leading to lower volumetric energy density and increased risk of contact short circuits due to the complex stacking and folding of tabs during assembly.
Innovation Solution
A battery design where multiple tabs are divided into groups and connected to a single conductive member within the housing, eliminating the need for stacking and folding, thereby reducing space occupation and minimizing the risk of reverse insertion during assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple tabs are stacked and folded to connect to a conductive member, then electrical conduction of multiple tabs can be led out of the housing, but the structure occupies a large space resulting in lower volumetric energy density
Solution Approach 1:
The current collector is divided into multiple tabs that are distributed around the periphery of the electrode assembly, with each tab connected to the conductive member through a separate connection point. This segmentation allows electrical conduction while minimizing space occupation compared to stacking and folding a single large conductive member.
2Reliability
If multiple tabs are stacked and folded to connect to a conductive member, then electrical conduction can be achieved, but the conductive member may be reversely inserted into the electrode assembly during assembly or use leading to contact short circuit
Solution Approach 1:
The tabs are pre-positioned around the periphery of the electrode assembly in a configuration that prevents reverse insertion of the conductive member. The peripheral distribution and connection structure are designed beforehand to ensure that during assembly or use (including falling scenarios), the conductive member cannot be reversely inserted into the electrode assembly, thereby preventing contact short circuits.
3Ease of operation
If multiple tabs are stacked and folded to connect to a conductive member, then electrical conduction can be led out, but the structure is complex and occupies significant space
Solution Approach 1:
Instead of stacking and folding tabs in a vertical or layered configuration, the invention distributes tabs in a peripheral arrangement around the electrode assembly. This dimensional change from vertical stacking to horizontal peripheral distribution simplifies the structure while maintaining electrical conduction functionality and reducing overall complexity.
Data Source
AI summary
A battery includes a housing, a battery cell, and a first conductive member. The housing is provided with an accommodating cavity, and the battery cell is accommodated in the accommodating cavity. The first conductive member includes a first terminal part located outside the housing, and a first connecting part connected to the first terminal part and located inside the housing. The battery cell includes an electrode assembly and N first tabs protruding from the electrode assembly, where N is an integer greater than 1. The N first tabs are divided into M first tab groups. The first tab groups are mutually separately connected to one side of the first connecting part facing the electrode assembly. M is an integer greater than or equal to 1 and less than or equal to N.