Battery Vent Gas Collection for Passenger Compartment Protection
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Solution Overview
Problem
During a battery thermal runaway, flammable gases are released, leading to increased internal pressure and potential explosion, with existing safety valves often causing gases to diffuse into passenger compartments, posing safety hazards.
Innovation Solution
A battery design incorporating a fume collecting component with a chamber in fluid communication with the explosion-proof valve's pressure relief port, connected to an exhaust pipe that guides gases to a preset position, preventing diffusion into the passenger compartment and accommodating large gas volumes to manage pressure relief.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If an explosion-proof valve is used to release gas during battery thermal runaway, then the internal pressure is relieved, but the gas diffuses into the passenger compartment causing safety hazards
Solution Approach 1:
The patent introduces a fume collecting component as an intermediary between the explosion-proof valve and the passenger compartment. This component includes a collecting chamber that captures the gas released from the battery and an exhaust pipe that directs it to a safe external location, thereby preventing the gas from entering the passenger compartment while maintaining pressure relief functionality
Solution Approach 2:
The patent extracts the harmful gas from the battery system by routing it through a dedicated fume collecting component with an exhaust pipe that discharges it externally. This separates the gas discharge function from the battery housing, preventing gas diffusion into the passenger compartment while maintaining pressure relief
2Object-affected harmful factors
If a fume collecting chamber is added to collect gases, then directional exhausting is enabled, but the device complexity increases
Solution Approach 1:
The fume collecting component is designed to perform multiple functions: it collects gas from the explosion-proof valve, stores it temporarily in a collecting chamber, and directs it externally through an exhaust pipe. By integrating these functions into a single component rather than separate systems, the patent achieves directional fume exhausting without proportionally increasing overall device complexity
Solution Approach 2:
The patent merges the gas collection, storage, and discharge functions into a single integrated fume collecting component. This consolidation reduces the number of separate parts and connections needed compared to having separate collection and discharge systems, thereby limiting the increase in device complexity while achieving directional exhausting
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 enables directional exhausting of fumes, reducing the risk of passenger safety threats by collecting and directing gases away from the passenger compartment, thus enhancing safety during battery pressure relief.
Implementation Method 1
the fume collecting chamber is in fluid communication with a pressure relief port of the explosion-proof valve
Implementation Method 2
an exhaust pipe, fluidly communicating with the fume collecting chamber and configured to guide a gas in the fume collecting chamber to a preset position
Data Source
AI summary
Some embodiments of this application provide a battery, an electrical device, and a battery manufacturing method. The battery includes a plurality of battery cells, a fume collecting component, and an exhaust pipe. The battery cells include an explosion-proof valve. The fume collecting component is disposed on a side of the battery cells, the side on which the explosion-proof valve is disposed. The fume collecting component includes a fume collecting chamber. The fume collecting chamber is in fluid communication with a pressure relief port of the explosion-proof valve. The exhaust pipe is in fluid communication with the fume collecting chamber and is configured to guide a gas in the fume collecting chamber to a preset position. The electrical device includes the battery. In this application, the fume collecting component collects the gas flowing out through the explosion-proof valve, and the exhaust pipe expels the gas to a preset position.