Cell Stack Insulating Cover Separation Wall Busbar Short Prevention
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Solution Overview
Problem
Conventional cell stack assemblies experience busbar-to-busbar shorts due to metal protrusions formed by oxidation/reduction reactions, which can lead to electrical connectivity issues.
Innovation Solution
A cell stack assembly with a busbar frame assembly and an insulating cover featuring ribs and separation wall members that limit the space between busbars, preventing direct contact and growth of metal protrusions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If busbars are spaced apart by a predetermined distance to prevent direct contact, then electrical isolation is improved, but metal precipitation occurs on the busbar surface due to oxidation/reduction reactions, leading to formation of metal protrusions that can cause shorts
Solution Approach 1:
An insulating cover is introduced as an intermediary component between the busbars. This cover includes separation wall members that extend into the space between adjacent busbars, creating a physical barrier that prevents metal protrusions from bridging the gap between busbars while maintaining the electrical isolation function
Solution Approach 2:
The insulating cover is segmented into multiple separation wall members, with each separation wall member corresponding to a rib and extending along the longitudinal direction of the rib. This segmentation allows the insulating cover to effectively block the space between each pair of neighboring busbars while maintaining structural integrity
2Reliability
If separation wall members are formed in one-to-one correspondence with each rib, then the space between busbars is effectively limited, but the device complexity increases
Solution Approach 1:
The separation wall members serve multiple functions simultaneously: they act as insulating barriers to prevent shorts, provide structural support corresponding to the rib positions, and define the spacing between busbars. This multi-functionality reduces the need for additional separate components, thereby limiting device complexity while maintaining effective short prevention
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
The solution effectively suppresses shorts at the busbar area, enhancing safety and reliability by restricting the movement of metal protrusions and maintaining electrical isolation.
Implementation Method 1
an insulating cover coupled to the busbar frame to cover the busbar frame assembly, wherein the insulating cover includes a separation wall member formed at a location corresponding to a rib of the busbar frame assembly
Data Source
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AI summary
Disclosed herein relates to a cell stack assembly with an insulating cover having a structure capable of separating each busbar. The cell stack assembly of the present invention includes: a cell stack including a plurality of cells from which electrode leads are drawn out; a busbar frame assembly including a plurality of busbars electrically connected to electrode leads of the cell stack, a busbar frame supporting the busbar, and ribs spanning between the busbars, and coupled to the cell stack; and an insulating cover coupled to the busbar frame to cover the busbar frame assembly, wherein the insulating cover includes a separation wall member formed at a location corresponding to a rib of the busbar frame assembly.