Replaceable Battery Venting Layout to Keep EV Cabin Gas Out
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electricity-driven vehicles with replaceable batteries do not adequately address the issue of gas generated from batteries entering the vehicle cabin, which can cause discomfort and potential hazards.
Innovation Solution
The vehicle is equipped with a smoke exhaust duct that extends from the battery casing to the outside of the vehicle, featuring a check valve to prevent gas inflow, and a thermal insulation member to manage heat transfer, ensuring gas is released externally and heat is contained.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If gas release passages are provided in the battery unit, then gas generated from the battery can be guided outside the casing, but gas may still enter the vehicle cabin causing discomfort and potential hazards
Solution Approach 1:
A smoke exhaust duct is introduced as an intermediary component between the battery casing and the vehicle cabin. The duct provides a dedicated pathway that directs gas away from the cabin, with the outlet positioned at the rear end of the vehicle where gas flow does not interfere with passenger comfort or cargo safety
Solution Approach 2:
The harmful gas is extracted from the battery casing through the smoke exhaust duct and removed from the vehicle cabin environment entirely. The duct system separates the gas discharge function from the cabin space, preventing gas accumulation in areas where passengers and cargo are located
2Ease of operation
If the battery is placed in a space not completely separated from the vehicle cabin, then the battery can be easily accessed and replaced, but gas generated from the battery can enter the vehicle cabin
Solution Approach 1:
The smoke exhaust duct acts as an intermediary that connects the battery space to the vehicle exterior, allowing gas to be channeled away before it can contaminate the cabin environment. This maintains the open battery configuration for easy access while adding a protective gas diversion pathway
3Temperature
If heat generated in the battery is allowed to transfer to the upper space, then heat dissipation occurs naturally, but degradation of baggage and discomfort of passengers occurs
Solution Approach 1:
Heat is extracted from the battery by directing hot gas through the smoke exhaust duct away from the cabin. The duct system removes both the gaseous byproducts and the thermal energy they carry, preventing heat accumulation in the passenger and cargo areas
Solution Approach 2:
The harmful hot gas that needs to be vented is converted into a beneficial cooling mechanism. By channeling hot air through the duct to the rear exterior, the system uses the gas flow itself to carry heat away from the battery and prevent overheating of surrounding components, baggage, and passenger areas
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
Prevents gas from entering the vehicle cabin, reducing passenger discomfort and protecting cargo from heat degradation, while simplifying battery assembly and maintaining vehicle efficiency.
Implementation Method 1
a check valve that is provided on the smoke exhaust duct, and that prohibits inflow of a fluid from the outside of the vehicle into the battery casing
Implementation Method 2
a thermal insulation member placed between the deck board and the battery casing
Data Source
AI summary
An electricity-driven vehicle includes: a floor panel; a depressed portion of a groove shape, that is formed on the floor panel and that extends in a vehicle width direction; a battery casing that is placed in the depressed portion; one or more batteries of a replaceable type, that can be attached to and detached from the battery casing; a smoke exhaust duct that extends from the battery casing, that penetrates through a bottom surface of the depressed portion, and that is opened to an outside of the vehicle; and a check valve that is provided on the smoke exhaust duct, and that prohibits inflow of a fluid from the outside of the vehicle into the battery casing.