Battery Cell Frame Recess and Disrupting Structure for Leakage Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The efficiency of producing battery cells, particularly redox flow batteries, is hindered by cumbersome alignment and bonding processes of cell frames, leading to low production efficiency.
Innovation Solution
A battery cell design featuring a bipolar plate inserted into an inner peripheral recessed portion of a frame body, with a disrupting structure that prevents electrolyte leakage between the frame body and bipolar plate, enhancing alignment and reducing leak channels, thus improving production efficiency and charge/discharge efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional bonding methods are used to assemble cell frames, then structural integrity is achieved, but production efficiency deteriorates due to cumbersome alignment and bonding processes
Solution Approach 1:
The frame body and bipolar plate are merged into a single integrated component. The bipolar plate is inserted into the frame body to form an integrated cell frame structure, eliminating the need for separate alignment and bonding processes while maintaining structural integrity.
Solution Approach 2:
The bipolar plate is nested within the frame body through insertion. The bipolar plate fits into a recessed portion of the frame body, creating a nested structure that simplifies assembly while ensuring proper positioning and structural stability.
2Reliability
If the bipolar plate is inserted into the frame body without a disrupting structure, then assembly is simplified, but electrolyte leakage occurs through leak channels between the frame body and bipolar plate
Solution Approach 1:
The peripheral portion of the frame body is segmented into multiple regions: a recessed portion for bipolar plate insertion, a disrupting structure that blocks leak channels, and a peripheral wall. This segmentation prevents electrolyte leakage while maintaining assembly simplicity.
Solution Approach 2:
The potential harmful effect of gap formation between the bipolar plate and frame body is converted into a benefit. The disrupting structure utilizes the natural gap space to create electrolyte flow disruption, preventing leakage while maintaining the simplicity of the inserted structure.
Data Source
AI summary
Provided are a battery cell that can be produced efficiently. A frame body of each cell frame of a battery cell includes an inner peripheral recessed portion formed by reducing a thickness of a peripheral portion that surrounds an entire perimeter of the penetrating window so that the peripheral portion has a smaller thickness than other portions of the frame body. A bipolar plate of the battery cell includes an outer peripheral engaging portion that engages with the inner peripheral recessed portion, the outer peripheral engaging portion being a portion having a particular width and extending throughout an entire outer periphery of the bipolar plate. The battery cell includes a disrupting structure that disrupts a leak channel that serves as an escape route for the electrolyte, the leak channel causing the inlet slit and the outlet slit to be in communication with each other and being formed between an outer periphery of the inner peripheral recessed portion and an outer periphery of the outer peripheral engaging portion when the cell frames are viewed from front.