Irregular Battery Exterior Body Holding Region for Electrolyte Injection
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Solution Overview
Problem
Batteries with irregularly shaped exterior bodies face challenges in efficiently injecting electrolytic solution due to varying penetration times depending on the position of the liquid injection port, affecting manufacturing productivity.
Innovation Solution
A battery design with an exterior body having specific inner surfaces and a liquid injection port located on the largest inner surface, creating a holding region that temporarily stores the electrolytic solution before it permeates the electrode body, allowing for increased injection volume and reduced injection frequency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the liquid injection port is provided on a small inner surface of the exterior body, then the device complexity is reduced, but the time required for electrolytic solution to permeate the entire electrode body increases
Solution Approach 1:
The patent transitions from considering only the injection port position on a single surface to utilizing the three-dimensional space within the exterior body. By creating a holding region that occupies volume between the injection port and the electrode body, the solution addresses the time issue by adding a spatial dimension for temporary solution storage, thereby reducing permeation time without complicating the port configuration.
Solution Approach 2:
The holding region acts as an intermediary between the liquid injection port and the electrode body. It temporarily stores the electrolytic solution and facilitates its gradual permeation into the electrode body, effectively mediating the transfer process and reducing the overall permeation time without requiring changes to the injection port configuration.
2Productivity
If multiple liquid injection ports are provided to reduce permeation time, then the electrolytic solution can be injected more efficiently, but the device complexity increases
Solution Approach 1:
Instead of adding multiple injection ports, the patent introduces a holding region as an intermediary structure that enables efficient solution distribution from a single port. This intermediary space allows the solution to accumulate and permeate the electrode body more effectively, achieving improved productivity without increasing structural complexity.
Solution Approach 2:
The patent changes the parameter of solution storage capacity by introducing the holding region. This volume parameter allows temporary accumulation of electrolytic solution, enabling more effective permeation into the electrode body and improving manufacturing efficiency without requiring multiple injection ports or complex structures.
3Adaptability or versatility
If the exterior body has an irregular shape, then the battery design flexibility is improved, but the electrolytic solution injection process becomes less efficient
Solution Approach 1:
The holding region serves as an intermediary that compensates for the challenges posed by irregular exterior body shapes. It provides a controlled space for solution accumulation and distribution, ensuring efficient permeation regardless of the exterior body's geometry, thereby maintaining productivity while preserving design flexibility.
Solution Approach 2:
By introducing the holding region volume as a key parameter, the patent decouples the injection efficiency from the exterior body shape. The holding region acts as a buffer that adapts to various irregular shapes, allowing efficient solution delivery without requiring standardized exterior body geometries.
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 configuration reduces the number of injections required and shortens the time for the electrolytic solution to permeate the entire electrode body, enhancing manufacturing efficiency even for irregularly shaped batteries.
Implementation Method 1
the electrolytic solution is injected bit by bit and it takes time to penetrate into the exterior body
Implementation Method 2
the electrolytic solution is injected into the exterior body via the injection port. The electrolytic solution is injected bit by bit and it takes time to penetrate into the exterior body
Data Source
AI summary
A battery has an electrode body which has an outer periphery and includes positive and negative electrodes with a separator disposed there between in a stacking direction. The battery further include an exterior body having a shape other than a substantially rectangular parallelepiped or cuboidal shape. The electrode body and an electrolytic solution are housed in the exterior body. The exterior body has at least first, second and third inner surfaces with the first and third inner surfaces being located on opposite sides of the second inner surface. The second inner surface is larger in area than the first and second inner surfaces. A liquid injection port is located in the exterior body and extends through the second inner surface. Each of the first, second and third inner surfaces faces and is spaced from a respective first, second and third section of the outer periphery of the electrode body by a respective gap so as define first, second and third regions, respectively, each of which has a respective volume. The volume the second region is larger than the volumes of the first and third regions and is capable of temporarily holding a volume of the electrolytic solution injected into the outer case via the liquid injection port.