Pin-Type Rechargeable Battery With Integrated Case and Gasket
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Solution Overview
Problem
Conventional rechargeable batteries are difficult to manufacture as pin types with ultra-small diameters due to the complexity and number of parts required, which limits their application in small-sized devices.
Innovation Solution
A rechargeable battery design featuring an electrode assembly wound in a jelly roll shape, with a reduced number of parts by using a gasket and case configuration that integrates tabs and conductive members for electrical coupling, allowing for a compact pin-type form with enhanced internal space utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional cylindrical rechargeable battery structure with multiple parts (electrode assembly, case, cap assembly, tabs, insulators) is used, then reliable electrical connectivity and sealing are achieved, but device complexity and manufacturing difficulty increase for ultra-small diameters
Solution Approach 1:
The patent merges the case and cap assembly into a single integrated case structure with a through-hole. The gasket is integrated into the case structure, eliminating the need for separate cap assembly and reducing the number of parts while maintaining sealing and electrical connectivity functions.
Solution Approach 2:
The integrated case structure serves multiple functions: it provides mechanical housing, sealing (through integrated gasket), and electrical connectivity (through conductive members in the through-hole). This multi-functional design reduces part count while maintaining reliability.
2Reliability
If conventional cylindrical rechargeable battery structure with multiple parts is used, then reliable sealing and electrical connectivity are achieved, but manufacturing difficulty increases for ultra-small diameters
Solution Approach 1:
The case and cap assembly are merged into a single integrated structure, reducing the number of assembly steps and manufacturing operations required. This simplifies the manufacturing process for ultra-small diameter batteries while maintaining sealing integrity through the integrated gasket.
3Reliability
If conventional battery structure with top and bottom insulators and multiple components is used, then electrical insulation is achieved, but internal space utilization decreases
Solution Approach 1:
The insulating function is integrated into the case structure itself rather than requiring separate insulator components. The case material and structure provide electrical insulation while accommodating the electrode assembly, maximizing internal space utilization.
Data Source
AI summary
A rechargeable battery includes a wound electrode assembly having first and second electrodes at opposite surfaces of a separator; a first case accommodating a first side of the electrode assembly and being coupled to the first electrode; a second case accommodating a second side of the electrode assembly and coupled to the second electrode; and a gasket engaged by the electrode assembly and combined at the first and second openings to seal the first and second openings.