Power Storage Module Frame Structure for Clear Communication Holes
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Solution Overview
Problem
Existing electric power storage modules face reliability issues due to defects in communication holes caused by resin blocking during injection molding, leading to decreased performance.
Innovation Solution
The electric power storage module features a frame member separately bonded to the sealing body, with communication holes surrounded by frame parts and flanges to disperse stress, preventing resin blockage and enhancing reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the frame member is integrally formed with the sealing body by injection molding, then the manufacturing process is simplified and productivity is improved, but the communication holes may be blocked by resin causing reliability to deteriorate
Solution Approach 1:
The frame member is divided into a separate component from the sealing body. The frame member is formed independently and then attached to the sealing body, preventing resin from blocking communication holes during injection molding while maintaining manufacturing efficiency through modular assembly.
2Reliability
If the frame member is formed separately and bonded to the sealing body, then reliability of communication holes is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The frame member is prepared in advance as a separate component with pre-formed communication holes, ensuring their functionality is preserved. This preliminary preparation allows for reliable assembly with the sealing body without compromising hole patency during the bonding process.
3Productivity
If resin is injected into the mold during injection molding, then the sealing body is formed efficiently, but the resin may flow into and block communication holes causing defects
Solution Approach 1:
The frame member containing communication holes is segmented as a separate insert component. During injection molding, this pre-formed frame member is placed in the mold and resin is injected around it, ensuring resin cannot block the pre-existing communication holes while maintaining efficient production.
Solution Approach 2:
The frame member acts as an intermediary component between the mold cavity and the sealing body. It provides a physical barrier that prevents resin from entering and blocking communication holes during the injection molding process, while still allowing the sealing body to be formed efficiently.
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 minimizes defects in communication holes, ensuring reliable operation and improved sealing during electrolyte solution filling, thereby enhancing the module's overall performance.
Implementation Method 1
the stress applied to the end surface is dispersed in the frame parts and the flanges, resulting in the reduction of the stress applied to the sealing body side
Implementation Method 2
a weld end part formed by welding of end portions of the plurality of sealing members and the plurality of spacers
Data Source
AI summary
An electric power storage module including an electrode stack, a sealing body provided with the electrode stack, and a frame member formed separately from the sealing body and bonded to the sealing body, in which the sealing body includes a welded end part formed by welding of end portions of sealing members and spacers, and communication holes having openings on an outer surface of the welded end part, the frame member includes frame parts surrounding the openings of the communication holes, each frame part has a first end surface bonded to the outer surface to surround each opening and a second end surface serving as an end surface opposite to the first end surface and formed to surround each opening.