Battery Module Vent Layout for Connector Short-Circuit Prevention
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Solution Overview
Problem
Existing power storage devices are prone to short circuits between the total positive and negative terminals due to gas discharge causing debris accumulation and electrical connections, leading to heat generation.
Innovation Solution
The power storage device includes a housing case with a case-side exhaust valve that discharges gas in a direction orthogonal to the electrical connectors, providing an exhaust path in the housing case to prevent gas from reaching the connectors and debris accumulation, thus reducing the risk of short circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the first connector and second connector are provided on the same wall portion of the housing case, then the electrical connection structure is simplified, but the risk of short circuit between total positive terminal and total negative terminal increases due to gas discharge causing debris accumulation
Solution Approach 1:
The exhaust valve is positioned on a different wall portion from the connectors, utilizing spatial dimensionality to separate the gas discharge path from the electrical connection area. This dimensional separation ensures that even though connectors are on the same wall for simplicity, the exhaust path directed toward a different wall prevents debris from reaching the connectors, thus resolving the contradiction between structural simplicity and safety reliability
2Length of moving object
If the exhaust valve is positioned near the connectors, then the gas discharge path is shortened, but the debris from discharged gas may cause short circuit between connectors
Solution Approach 1:
The exhaust valve is extracted from the vicinity of the connectors and positioned on a different wall portion of the housing case. This extraction removes the harmful interaction between the gas discharge path and the electrical connectors, allowing the discharge path to be optimally positioned for safety without being constrained by proximity to connectors, thus eliminating the short circuit risk while maintaining efficient gas discharge
3Device complexity
If no exhaust path is provided in the housing case, then the housing case structure is simplified, but gas discharge causes debris accumulation leading to short circuits
Solution Approach 1:
The housing case structure serves as an intermediary by incorporating an exhaust path that channels gas discharge away from the electrical connectors. This intermediary structure prevents direct interaction between discharged gas/debris and the connectors, resolving the contradiction by providing a protective pathway that maintains both structural simplicity and reliability
Data Source
AI summary
The power storage device includes one or more power storage stacks, and includes a power storage module having a total positive terminal and a total negative terminal, a housing case for housing the power storage module, a case-side exhaust valve provided in the housing case, and a first connector electrically connected to the total positive terminal and a second connector electrically connected to the total negative terminal, wherein the housing case has a first wall portion and a second wall portion opposed to each other in the first direction, the first connector and the second connector are provided in the first wall portion, the case-side exhaust valve is provided in the second wall portion, and each of the one or more power storage stacks is provided so as to be capable of discharging gas in a second direction orthogonal to the first direction.