Power Storage Pack Venting Path for Resin-Filled Battery Blocks
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Solution Overview
Problem
The existing power storage pack configurations, such as those disclosed in PTL 1, face challenges in reliably exhausting high temperature gas when a battery abnormality occurs, especially when a resin filler is used around the batteries, as it can fill the gas exhaust path and hinder effective gas removal.
Innovation Solution
The proposed power storage pack configuration includes a hollow member interposed between the pack case and the power storage block, with a resin filler between the power storage device and the hollow member. The hollow member has an opening connected to an exhaust port in the pack case, preventing the resin filler from entering the hollow member during assembly and ensuring effective gas exhaustion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a collection space is provided to exhaust high temperature gas, then gas exhaust function is improved, but the structure becomes more complex with partition walls and multiple spaces
Solution Approach 1:
The partition wall serves multiple functions simultaneously: it separates the first and second collection spaces to prevent resin filler contamination, provides structural support within the storage container body, and creates organized pathways for both gas flow and resin filler placement. This merging of functions reduces overall structural complexity
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 simplifies the structure and enhances the reliability of the power storage pack by ensuring efficient exhaustion of high temperature gas during battery abnormalities, while also preventing chain reactions of thermal runaway through heat absorption by the resin filler.
Implementation Method 1
dispose and cure a potting material (resin filler) around the battery to absorb or alleviate heat of the battery with an abnormality having occurred with the potting material
Implementation Method 2
a hollow member interposed between the pack case and the at least one power storage block, a part of the hollow member facing the exhaust valve of the at least one power storage device; and a resin filler interposed between the at least one power storage device and the hollow member, the hollow member including an opening and an outer surface any of which is connected to the exhaust port of the pack case
Data Source
AI summary
A power storage pack includes: at least one power storage block including at least one power storage device including an exhaust valve; pack case accommodating the at least one power storage block and including an exhaust port; hollow member interposed between pack case and the at least one power storage block, a part of the hollow member facing the exhaust valve of the at least one power storage device; and a resin filler interposed between the at least one power storage device and hollow member. Hollow member includes opening and an outer surface any of which is connected to exhaust port of pack case.