Battery Electrolyte Filling Orientation to Shorten Permeation Time
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Solution Overview
Problem
The existing manufacturing methods for batteries result in a long permeation time for electrolytic solution due to the long distance it needs to travel through the electrode body, particularly when the unsealed portion is positioned in a side where the collector terminals are not present, leading to inefficient filling.
Innovation Solution
The method involves arranging the electrode body such that the electrolytic solution is injected and permeates in a state where the long sides of the rectangular power generation element are on the lower side, reducing the permeation distance and time by rotating the intermediate member from a second arrangement state to a first arrangement state during the process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the unsealed portion is provided in a short side of the power generation element, then the electrolytic solution can be injected into the electrode body, but the permeation distance becomes long and the permeation time increases
Solution Approach 1:
The patent applies dynamics by rotating the intermediate member from a first arrangement state to a second arrangement state between the injection step and the permeation step. This dynamic repositioning changes the orientation of the power generation element so that the unsealed portion moves from a short side to a long side position, thereby reducing the permeation distance and time while maintaining injection accessibility.
2Reliability
If the electrolytic solution is injected through a long distance path, then complete filling of the electrode body is achieved, but the manufacturing efficiency decreases due to extended permeation time
Solution Approach 1:
The patent uses dynamics by implementing a rotation operation that changes the arrangement state of the intermediate member. This dynamic adjustment optimizes the permeation path length while ensuring complete filling of the electrode body, thereby improving manufacturing efficiency without compromising filling completeness.
Solution Approach 2:
The patent applies parameter changes by altering the orientation parameter (arrangement state) of the intermediate member. By changing from the first arrangement state to the second arrangement state, the permeation path length parameter is reduced, which directly improves manufacturing efficiency while maintaining reliable filling.
3Ease of operation
If the intermediate member is kept in a fixed arrangement state during injection and permeation, then the process is simple to operate, but the permeation time cannot be optimized
Solution Approach 1:
The patent resolves this contradiction by introducing a controlled dynamic element - rotation between two defined arrangement states. This dynamic approach maintains operational simplicity through standardized positions while optimizing permeation time by changing the orientation to reduce the permeation path length.
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
This approach significantly reduces the permeation time of the electrolytic solution by shortening the distance it needs to travel, achieving a ¼ reduction when the aspect ratio of the electrode body is 2:1, thereby enhancing the manufacturing efficiency.
Implementation Method 1
a permeation step of causing the injected electrolytic solution to permeate the intermediate member
Implementation Method 2
a permeation step of causing the injected electrolytic solution to permeate the intermediate member
Data Source
AI summary
A manufacturing method of a battery includes: an injection step of injecting the electrolytic solution into the intermediate member via an unsealed portion; and a permeation step of causing the electrolytic solution to permeate the intermediate member. The electrode body includes a power generation element and a first collector terminal and a second collector terminal. The power generation element has a first side and a second side corresponding to long sides in the rectangular shape of the power generation element, and a third side and a fourth side corresponding to short sides in the rectangular shape of the power generation element. The first collector terminal and the second collector terminal are placed on the first side and on the second side, respectively. In the permeation step, the intermediate member is placed such that the first side is placed on a vertically lower side as a first arrangement state.