Battery Case Wrapping Assembly for High-Density Electrode Bodies
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional methods for manufacturing electrical energy storage devices face challenges in accommodating electrode bodies efficiently, often resulting in creases in separators or displacement of electrode plates due to the electrode body being inserted through an opening, which hinders optimal volume energy density.
Innovation Solution
A manufacturing method involving a plate material that is bent to wrap the electrode body, forming a case with a square shape, including a first surface and extending second surfaces, to improve accommodation and prevent creases or displacement during insertion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the electrode body is made as large as possible to improve volume energy density, then the volume energy density is improved, but the electrode body cannot be properly inserted through the opening of the case main body
Solution Approach 1:
Instead of inserting the electrode body through an opening in the case main body, the invention inverts the process by forming the case around the electrode body. The plate material is bent to wrap and enclose the electrode body, eliminating the need for insertion through an opening. This allows the electrode body to be made as large as possible without insertion constraints.
2Ease of manufacture
If the electrode body is inserted through the opening, then the case can be assembled, but the outer peripheral part of the electrode body is caught at the opening causing accommodation difficulties
Solution Approach 1:
The case is pre-formed by bending the plate material to create the case main body with its characteristic shape before the electrode body is placed inside. This preliminary formation of the case structure eliminates the need to force the electrode body through an opening, allowing precise accommodation without catching or misalignment.
3Ease of manufacture
If the electrode body is inserted through the opening, then the case can be closed, but the electrode body contacts the opening causing creases in the separator or displacement of the electrode plate
Solution Approach 1:
The invention eliminates the harmful contact between the electrode body and the case opening by inverting the assembly process. The case is formed to enclose the electrode body without requiring insertion through an opening, thereby preventing creases in the separator and displacement of the electrode plate that would otherwise occur during insertion.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method enhances the accommodation of electrode bodies, reducing the likelihood of creases in separators and electrode plate displacement, thereby improving the overall efficiency and volume energy density of the electrical energy storage device.
Implementation Method 1
bending the plate material so that a distance between the pair of second parts decreases, thereby wrapping the electrode body
Data Source
AI summary
A manufacturing method for an electrical energy storage device disclosed herein includes: a preparing step of preparing a plate material that is made of metal and includes a first part forming a first surface of a case, and a pair of second parts extending from the first part and forming a pair of second surfaces of the case; and a wrapping step of disposing an electrode body on the first part of the plate material and bending the plate material so that a distance between the pair of second parts decreases, thereby wrapping the electrode body.