Same-End Cylindrical Battery with Integrated USB Charging
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Solution Overview
Problem
Conventional cylindrical lithium batteries with negative pole protection devices face challenges in controlling product size, reliability, and appearance, with low yield rates and coarse designs, especially when using nickel strips and specific chargers.
Innovation Solution
A cylindrical lithium battery design with a positive pole and negative pole at the same end, featuring a recharging protection assembly on the positive pole, including a steel cover, plastic frames, and a USB charging circuit, eliminating the need for long nickel strips and enhancing reliability and charging convenience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional negative pole protection device with nickel strip is used, then the battery can be protected, but the product size cannot be controlled and the appearance is coarse
Solution Approach 1:
The protection device is segmented into distinct functional components: a protection board for electrical control, a steel cover for structural protection, and a plastic frame for positioning and insulation. This segmentation allows each component to be optimized independently, improving both reliability and manufacturing precision.
Solution Approach 2:
The nickel strip connection method is extracted and replaced with a welded copper cap connection. This extraction eliminates the size and appearance issues associated with long nickel strips while maintaining the protection function through the integrated steel cover and plastic frame structure.
2Reliability
If a specific charger is used for charging, then the battery can be charged, but the cost of using the product increases and charging convenience decreases
Solution Approach 1:
The protection board is equipped with a USB charging port that implements universal compatibility with standard USB chargers. This multi-functionality allows the battery to be charged with any standard USB charging device, eliminating the need for proprietary chargers and significantly improving charging convenience while maintaining reliable protection through the same protection board.
3Reliability
If the protection panel is disposed at the negative pole with long nickel strips, then the battery can be protected, but the product yield rate is low and appearance is poor
Solution Approach 1:
The protection device is inverted from the conventional negative pole placement to the positive pole placement. The protection board is mounted on the positive pole with the steel cover and plastic frame structure, which simplifies the assembly process, improves manufacturing precision, and significantly increases the product yield rate while maintaining full protection functionality.
Data Source
AI summary
A cylindrical lithium battery having a positive pole and a negative pole at the same end, including a shell, a core in the shell, a cover and a recharging protection assembly mounted on top of the positive pole of the core, and is covered and fixed by the cover; the recharging protection assembly has an upper frame, a recharging protection panel, a lower frame, a positive pole nickel plate and a negative pole nickel plate; the recharging protection panel is disposed on the lower frame; a top surface of the recharging protection panel is welded with a gold-plated copper cap; one side of the recharging protection panel is provided with a USB charging port.