Cylindrical Battery Bottom-Terminal Layout for Simpler Assembly
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Solution Overview
Problem
The existing cylindrical battery structure with positive and negative terminals on opposite sides requires complex electrical connections, increased manufacturing costs, and limited energy density due to complicated internal structures and the need for insulation and waterproofing components on both ends.
Innovation Solution
A cylindrical battery design with both positive and negative terminals arranged on the same side, allowing for simplified electrical connections and increased energy density by positioning the terminals on the bottom of the battery housing, enabling easier assembly and insulation, and allowing the electrode assembly to be in close contact with the bottom.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If positive and negative terminals are disposed on opposite sides of the cylindrical battery, then electrical connection between batteries is achieved, but the electrical connection structure becomes complicated and requires components on both top and bottom
Solution Approach 1:
The patent merges both positive and negative terminals onto the same side (bottom) of the cylindrical battery. The terminal assembly includes a terminal holder with insulating structure and multiple terminals arranged in a compact configuration, combining functions that were previously separated into different locations (top and bottom), thereby simplifying the overall electrical connection structure.
Solution Approach 2:
The patent transitions from a one-dimensional arrangement (terminals at top and bottom along the axial direction) to a two-dimensional arrangement (both terminals on the bottom surface). This spatial reconfiguration allows both terminals to be accessible from the same side, simplifying battery pack assembly and electrical connections.
2Area of stationary object
If positive and negative terminals are arranged at one end in the axial direction, then terminal area is optimized, but the internal structure becomes complicated and manufacturing cost increases
Solution Approach 1:
The patent segments the terminal functions into distinct components: a terminal holder (insulating structure) and separate positive/negative terminals. This segmentation allows each component to be optimized independently while maintaining compact overall dimensions, avoiding the need for complicated internal structures that would result from integrating all functions into a single end-cap design.
Solution Approach 2:
The terminal holder acts as an intermediary component between the battery electrodes and external connections. It provides structural support, electrical insulation, and mechanical mounting for the terminals, enabling simplified terminal arrangement without requiring complicated internal electrode structures.
3Reliability
If terminals are arranged on opposite sides, then insulation and waterproofing components are required on both ends, but the number of components increases and structure becomes complicated
Solution Approach 1:
The patent combines insulation and waterproofing functions into a single integrated terminal holder assembly located at the bottom. The insulating structure of the terminal holder simultaneously provides electrical insulation and seals the terminal area, eliminating the need for separate insulation components and waterproof caps that would be required if terminals were on opposite sides.
Solution Approach 2:
The terminal holder serves multiple functions simultaneously: it provides electrical insulation between terminals and battery housing, ensures waterproof sealing at the bottom opening, provides mechanical support for terminals, and facilitates heat dissipation. This multi-functionality reduces the total number of components while maintaining reliability.
Data Source
AI summary
A method of manufacturing a battery according to the present disclosure includes (a) preparing a battery housing having an opening at one side and a bottom having a through-hole at the other side; (b) fixing an electrode terminal to the through-hole; (c) preparing an electrode assembly including a first electrode tab formed of a first uncoated portion and a second electrode tab formed of a second uncoated portion at upper and lower parts, respectively; (d) inserting the electrode assembly into the battery housing through the opening at one side of the battery housing such that the first electrode tab faces the bottom; (e) electrically connecting the first electrode tab to the electrode terminal; and (f) covering the open end with a cap plate.