Battery Cell Housing Structure Without Feedthrough Holes
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Solution Overview
Problem
Existing battery cell housings require a hole for current output, making them less integral and complicating electrical connections due to the need for a feedthrough, which also increases the distance between positive and negative electrode terminals.
Innovation Solution
A battery cell housing design with a first housing connected to a first tab and a second housing connected to a second tab of different polarity, featuring a bulge that extends towards the second housing for direct current output without a hole, facilitated by insulation portions and flexible positioning for improved electrical connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a hole is provided in the battery cell housing for current output, then electrical connection to external circuit is enabled, but the housing integrity is compromised and device complexity increases
Solution Approach 1:
The patent merges the functions of current conduction and housing structure by making the first and second housings themselves electrically conductive. The housings directly connect to the electrode assembly tabs and serve as current output paths, eliminating the need for separate feedthrough components and holes in the housing.
2Ease of operation
If a feedthrough is used for current output, then electrical connection is achieved, but the distance between positive and negative electrode terminals increases
Solution Approach 1:
The patent extracts and eliminates the feedthrough component from the battery cell structure. By using the housings directly as current conductors, the design removes the intermediate feedthrough element that previously increased the distance between terminals, thereby shortening the overall terminal distance.
3Ease of operation
If the bulge extends towards the second housing, then electrical connection is facilitated, but the accommodating cavity volume is reduced
Solution Approach 1:
The patent applies local quality by creating a bulge in the first housing at a specific location where electrical connection is needed. The bulge provides localized current conduction capability and facilitates connection to the second housing, while the rest of the housing maintains its full structural integrity and accommodating cavity volume.
Data Source
AI summary
Disclosed herein are a battery cell housing, a battery cell, a battery, and an electric device. The battery cell housing defines a cavity configured to accommodate an electrode assembly, and the battery cell housing includes a first housing and a second housing. The first housing is electrically connected to a first tab of the electrode assembly. The second housing is fixed to the first housing in an insulated manner. The second housing is electrically connected to a second tab of the electrode assembly and the second tab is different from the first tab in polarity. The first housing includes a bulge electrically connected to the first tab, and the bulge extends in a direction approaching the second housing. Therefore, there is no need to provide a hole in the battery cell housing, thereby rendering the battery cell housing more integral.