Angular Battery Case Structure for Electrode Body Protection
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Solution Overview
Problem
Angular batteries face challenges in protecting the electrode body during manufacturing, as the laminated surfaces are exposed and prone to damage when inserted into the battery case, leading to difficulties in insertion and potential damage.
Innovation Solution
The angular battery design features a U-shaped battery case with integrally provided short side surfaces on the lid body that serve as both insertion guides and protective members, preventing interference between the case and electrode body, and reducing material waste by using bent products for both the case and lid, enhancing productivity and reducing manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the electrode body is made as large as possible to improve volumetric energy density, then the energy density is improved, but the electrode body is more likely to be caught in the opening or damaged during insertion
Solution Approach 1:
A protection plate is introduced as an intermediary component between the electrode body and the battery case opening. The protection plate covers the exposed laminated surfaces of the electrode body during insertion, preventing direct contact and damage between the electrode body and the opening edges, thus resolving the contradiction between maximizing electrode size and protecting the electrode body
2Ease of manufacture
If the electrode body is inserted through the angular opening after the battery case body is produced, then the manufacturing process is simplified, but the exposed laminated surface of the electrode body is prone to damage
Solution Approach 1:
The protection plate is prepared in advance and attached to the electrode body before insertion into the battery case. This preliminary protective measure ensures that the laminated surfaces are already protected when the electrode body is inserted through the angular opening, preventing damage while maintaining the simplicity of the manufacturing process
3Ease of operation
If the battery case uses separate components for case body and lid, then the assembly is easier, but the electrode body lacks sufficient protection from interference between case components
Solution Approach 1:
The protection plate is integrated with either the case body or the lid through joining methods such as welding, riveting, or adhesive bonding. This merging creates a unified structure that provides continuous protection for the electrode body while maintaining the ease of assembly through pre-integrated protective elements
Data Source
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AI summary
The present disclosure provides an angular battery with enhanced protection of an electrode body. The present disclosure provides an angular battery including an electrode body and a battery case that accommodates the electrode body. The battery case is configured of a substantially U-shaped case body that has a rectangular bottom surface and a pair of long side surfaces provided integrally with the bottom surface and facing each other, and a substantially U-shaped lid body having an upper lid facing the bottom surface and a pair of short side surfaces provided integrally with the upper lid and facing each other. The electrode body is attached to the lid body. In the angular battery, the case body and the lid are joined to each other to form a state in which the electrode body is accommodated inside the battery case.