Assembled Battery Insulation Fluid Short Circuit Prevention
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Solution Overview
Problem
Conventional air cells in assembled batteries face a risk of short circuits due to the alkali electrolysis solution between adjacent cells, which is critical when numerous air cells are assembled for use in main or auxiliary power supplies in moving bodies like automobiles.
Innovation Solution
The solution involves arranging air cells in a horizontal direction with storage portions for electrolysis solution and using connection flow paths with insulation fluid to prevent electrical shorts between adjacent cells, ensuring equal power generation performance by facilitating uniform electrolysis solution injection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple air cells are assembled in one cell casing to form an assembled battery, then productivity and space utilization are improved, but the risk of short circuit between adjacent cells increases
Solution Approach 1:
The invention divides the cell assembly into two independent configurations: either separate cell casings for each air cell, or a single cell casing with partition plates dividing it into separate spaces. This segmentation physically isolates the electrolysis solution in each cell, preventing short circuits while maintaining assembly efficiency. The partition plates create distinct compartments that prevent liquid junction between adjacent cells.
Solution Approach 2:
The invention introduces an insulation fluid as an intermediary substance between adjacent air cells. This insulation fluid, which has different density than the electrolysis solution, acts as a barrier that prevents direct contact between electrolysis solutions of adjacent cells. The insulation fluid fills the connection flow paths and prevents electrical conduction between cells, thereby eliminating short circuit risk while allowing cells to be closely assembled.
2Device complexity
If partition plates with recesses filled with fused alkali are used to create multiple cells, then device complexity is reduced, but short circuit risk increases after water injection
Solution Approach 1:
The invention extracts the harmful fused alkali from the partition plate structure and replaces it with a liquid insulation fluid in the connection flow paths. This extraction eliminates the short circuit risk associated with fused alkali while maintaining the cell division function. The insulation fluid can be easily introduced and adjusted without the complications of fused alkali handling.
Solution Approach 2:
The invention changes the physical state and location of the insulation medium from solid fused alkali in partition plate recesses to liquid insulation fluid in connection flow paths. This parameter change allows for better control, easier maintenance, and elimination of the short circuit risk that occurs when water is injected and mixes with the electrolysis solution through the fused alkali paths.
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 effectively prevents short circuits and ensures uniform electrolysis solution distribution across air cells, enhancing the reliability and efficiency of power generation in assembled batteries for automotive applications.
Implementation Method 1
an insulation fluid for electrically insulating the electrolysis solution in the respective adjacent air cells is sealed in the connection flow path member
Implementation Method 2
a connection flow path member including one or more connection flow paths by which the storage portions of the respective adjacent air cells communicate with each other
Data Source
AI summary
An assembled battery includes a plurality of air cells arranged in a horizontal direction and a plurality of connection flow paths. Each air cell includes a storage portion between a positive electrode and a metal negative electrode to store an electrolysis solution. The storage portions of the respective adjacent air cells communicate with each other by the respective connection flow paths. An insulation fluid for electrically insulating the electrolysis solution in the respective adjacent air cells is sealed in the respective connection flow paths.