EV Battery Smoke Ventilation via Gas Sensor Feedback
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Solution Overview
Problem
Conventional methods for exhaustingsmoke from lithium ion batteries in electric vehicles are inefficient, particularly when smoke is generated due to reasons other than collisions, leading to delayed smoke removal and potential user discomfort.
Innovation Solution
An electric vehicle equipped with a lithium ion battery, a battery state detector, a ventilation mechanism, and a controller that initiates ventilation when the battery is in an abnormal state, including a gas discharge passage, gas sensors, and a window opening mechanism to promptly exhaust smoke outside the vehicle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the air conditioner is started and window is opened when collision is predicted by collision detection sensor, then smoke can be exhausted out of the vehicle, but unnecessary operation occurs when no actual collision occurs causing user discomfort
Solution Approach 1:
The system uses gas sensors to detect smoke or gas generation from the lithium ion battery and provides feedback to the controller. The controller then activates the ventilation mechanism only when actual smoke is detected, rather than relying on collision prediction alone. This feedback mechanism ensures smoke is exhausted when needed while avoiding unnecessary operations that would cause user discomfort.
Solution Approach 2:
The ventilation mechanism includes automatic window opening and air conditioner activation functions that operate autonomously based on sensor detection. When smoke or gas is detected from the battery, the system self-activates the ventilation without requiring manual user intervention, promptly exhausting the smoke while maintaining user comfort through intelligent control.
2Object-affected harmful factors
If the ventilation mechanism is activated based on collision prediction, then smoke exhaust is enabled, but smoke cannot be exhausted promptly when smoke is generated by reasons other than collision
Solution Approach 1:
Gas sensors continuously monitor the vehicle interior for smoke or gas generation from the lithium ion battery. When smoke is detected through this feedback mechanism, the controller immediately activates the ventilation mechanism, ensuring prompt smoke exhaust regardless of whether the cause is collision or other battery abnormalities.
Solution Approach 2:
The gas sensors are pre-installed and continuously monitoring the vehicle interior, ready to detect smoke generation at any time. This preliminary detection capability ensures that when smoke is generated from the battery for any reason, the system can respond immediately without waiting for collision detection or manual activation.
3Use of energy by moving object
If the lithium ion battery is installed inside the vehicle interior to utilize air-conditioned air for cooling, then air conditioner efficiency is improved, but smoke generated from battery short circuit enters the vehicle interior
Solution Approach 1:
Gas sensors act as intermediaries between the lithium ion battery and the vehicle interior environment. When smoke or gas is detected by these sensors, they trigger the ventilation mechanism which then activates the air conditioner and window opening functions. This intermediary detection system allows the battery to remain inside the vehicle interior for efficient cooling while preventing smoke intrusion through prompt ventilation activation.
Solution Approach 2:
The system uses gas sensors to continuously monitor for smoke generation from the battery. When smoke is detected, feedback is sent to the controller which activates the ventilation mechanism including air conditioner and window control. This feedback loop maintains the benefit of having the battery inside for efficient cooling while protecting the vehicle interior from smoke intrusion through automatic ventilation response.
Data Source
AI summary
An electric vehicle is provided with a cell voltage sensor (32) and a cell temperature sensor (31) which are mounted to each of a plurality of cells (21); a gas temperature sensor (33), a carbon monoxide gas sensor (34), and a hydrogen gas sensor (35) which are mounted to a chamber (27); a gas temperature sensor (36), a carbon monoxide gas sensor (37), and a hydrogen gas sensor (38) which are mounted to a gas exhaust passage (28); and an air-conditioning fan (17), a channel-switching damper (19), and a driving motor (42) which lowers a window glass (41). When battery state values detected by the sensors (31) to (38) exceed predetermined thresholds, a battery pack (20) is judged to be abnormal. Then, the channel-switching damper (19) and the air-conditioning fan (17) are started and the window glass (41) is lowered to ventilate the vehicle interior. This speedily exhausts smoke generated from a lithium ion battery.