Electrochemical cell having quasi-bipolar structure
AssigneeKim's Techknowledge Inc.
InventorSeong Min Kim
Life of this patent
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Abstract
An electrolyte injection hole is formed in a current collector extension part between negative and positive active material layers of a quasi-bipolar electrode, and another electrolyte injection hole corresponding to the electrolyte injection hole of the quasi-bipolar electrode is formed in a sidewall of a hollow core around which the electrode is wound, so as to easily inject a predetermined amount of electrolyte into each unit cell of an electrode assembly through an electrolyte injection port and the core. Therefore, simple, reliable, and easy-to-manufacture electrochemical cell can be provided.
Claims26
An electrochemical cell comprising:
- an electrode comprising a current collector, and positive and negative active material layers disposed at both sides of the current collector and spaced apart from each other with a current collector extension part being located therebetween, wherein a polarity of the electrode is used as an opposite polarity in a neighboring cell;
- a hollow core;
- an electrolyte isolation barrier wall disposed at the current collector extension part of the electrode;
- a case accommodating an electrode assembly formed by winding at least one electrode including the electrode around the core;
- and
- an electrolyte injection port disposed in a side surface of the case and connected to an inside area of the core,
- wherein a plurality of first electrolyte injection holes are formed in the current collector extension part of the electrode at predetermined intervals, and
- one or more second electrolyte injection holes corresponding to the first electrolyte injection holes are formed in a sidewall of the core.
Dependencies are inferred from the claim text.