Prismatic Secondary Battery Assembly for Tab Insertion Reliability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing secondary battery manufacturing methods face challenges in achieving high energy density and reliability due to issues with electrode tab insertion and unintended deformation, as well as limitations in energy density improvement.
Innovation Solution
A method involving a prismatic secondary battery design with a case main body having openings at both ends, where electrode assemblies are inserted from one end with tab groups electrically connected to conductive members before insertion, and sealed using sealing plates, along with an insulating sheet to prevent damage during insertion, enhancing stability and energy density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the electrode tab group is inserted into the case through openings at both ends, then the battery can be manufactured with a compact structure, but the electrode tab may hinder insertion and cause unintended deformation
Solution Approach 1:
The electrode tab group is joined to the conductive member before insertion into the case. This preliminary joining action prevents the tab from bending or deforming during the insertion process, ensuring reliable electrical connection while maintaining the compact battery structure.
Solution Approach 2:
A conductive member is introduced as an intermediary component between the electrode tab group and the terminal. This conductive member facilitates the electrical connection while allowing the tab to be properly positioned and secured during insertion, preventing deformation and ensuring reliable connectivity.
2Ease of manufacture
If the electrode assembly is inserted from the second end portion side, then the manufacturing process can be simplified, but the electrode tab group may deform during insertion
Solution Approach 1:
The electrode tab group is pre-joined to the conductive member before insertion. This preliminary action ensures that the tab maintains its position and shape during the simplified insertion process from the second end, preventing deformation while keeping the manufacturing process straightforward.
3Quantity of substance
If the energy density is improved by optimizing battery structure, then more energy can be stored, but the manufacturing stability and reliability may be compromised
Solution Approach 1:
By joining the electrode tab to the conductive member before insertion, the invention ensures manufacturing stability and reliability. This preliminary joining prevents defects during assembly, allowing for optimized battery structures that maximize energy storage capacity without compromising manufacturing quality.
Solution Approach 2:
The conductive member serves as an intermediary that enables reliable electrical connection while allowing for optimized electrode and terminal arrangements. This facilitates higher energy density designs while maintaining manufacturing reliability through consistent and stable assembly processes.
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A method of manufacturing a secondary battery includes: inserting an electrode assembly (200) into a case main body (110) from the second end portion side of the electrode assembly (200) through a first opening (111) after joining a second electrode tab group (220A) to a first conductive member (321); electrically connecting a second electrode terminal (132) and the second electrode tab group (220A) to each other, a second electrode terminal (132) being provided on a second sealing plate (122); sealing the first opening (111) with the a sealing plate (121) after electrically connecting a first electrode terminal (131) and a first electrode tab group (210A) to each other; and sealing a second opening (112) with the second sealing plate (122) after electrically connecting the second electrode terminal (132) and the second electrode tab group (220A) to each other.