Battery Cell Tab Protection Sheet for Electrolyte Injection Impact
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Solution Overview
Problem
During the manufacturing of battery cells, the injection of electrolyte can damage electrode plates or separators due to direct impact, leading to potential short circuits and reduced performance.
Innovation Solution
A protection sheet is provided on the tab of the electrode assembly, shielding the region corresponding to the electrolyte injection hole, which alleviates the impact of the electrolyte and reduces the risk of damage to the electrode assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If electrolyte is injected through an electrolyte injection hole of an end cover, then the battery cell can be filled with electrolyte, but the electrolyte will impact the electrode assembly, resulting in damage to an electrode plate or separator
Solution Approach 1:
A protection sheet is introduced as an intermediary component between the electrolyte injection hole and the electrode assembly. The protection sheet receives the electrolyte injection first, then guides it to flow along its side surface into the battery cell, preventing direct impact on the electrode plates and separator while ensuring complete electrolyte filling
Solution Approach 2:
The protection sheet is pre-installed in the electrolyte injection hole before electrolyte injection begins. This preliminary placement creates a protective barrier that redirects the electrolyte flow path, allowing the electrolyte to enter the cell without directly contacting and damaging the electrode assembly
Data Source
AI summary
Provided are a battery cell, a battery, and an electric apparatus. The battery cell includes: an electrode assembly including a body portion and a tab, where the body portion has a body end surface, and the tab is led out of the body end surface; and a housing having a first wall, where the first wall is provided with an electrolyte injection hole and an electrode terminal, and the tab is electrically connected to the electrode terminal. At least one surface of the tab is provided with a protection sheet, the protection sheet shielding at least part of a region, on the body portion, corresponding to the electrolyte injection hole.