Battery Cell Dual-Passage Venting for Thermal Runaway Emissions
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing battery designs face safety issues due to high-temperature and high-pressure emissions during thermal runaway, as single passage discharge mechanisms can lead to structural breaches, causing further damage and explosions.
Innovation Solution
The battery design incorporates a dual passage system, with a first passage discharging emissions into an electrical cavity and a second passage expelling them out, utilizing a pressure relief mechanism on a first wall and a connecting structure to facilitate simultaneous discharge, reducing the risk of explosion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a battery is charged to high state of charge (100%) to maximize available capacity, then the battery capacity is fully utilized, but the battery lifespan is significantly reduced due to accelerated aging
Solution Approach 1:
The system performs preliminary action by proactively reducing the charge level from 100% to a lower state (e.g., 80-90%) before significant aging can occur. The controller monitors state of charge and automatically initiates discharge to extend battery lifespan, preventing the harmful effects of prolonged high voltage exposure that accelerates degradation.
2Duration of action of moving object
If a battery is discharged to low state of charge to extend usage time, then the available usage time is increased, but the battery lifespan is reduced due to deep discharge damage
Solution Approach 1:
The system applies beforehand cushioning by establishing protective thresholds that prevent the battery from entering dangerous discharge states. The controller monitors state of charge and initiates charging before the battery reaches critically low levels, cushioning against the harmful effects of deep discharge and extending both usage time and lifespan through preventive management.
3Adaptability or versatility
If battery charge-discharge cycles are frequent to meet dynamic power demands, then the power supply flexibility is improved, but the battery lifespan is reduced due to cycle wear
Solution Approach 1:
The system implements feedback by continuously monitoring battery state of charge, current draw, and usage patterns. Based on this feedback, the controller dynamically adjusts charge-discharge behavior to balance power supply flexibility with lifespan protection, reducing unnecessary cycles during stable conditions while maintaining responsiveness when needed.
Data Source
Figure 1~3
Figure 4~6
Figure 7~8
AI summary
Embodiments of the present application provide a battery and an electrical device. The battery comprises: a box body (11) including an electrical cavity (11a); a battery cell (20) accommodated in the electrical cavity (11a) and provided with a pressure relief mechanism (213) on a first wall (21a) of the battery cell (20); a first passage (15) and a second passage (16), the first passage (15) and the second passage (16) being configured to be able to communicate with the inside of the battery cell (20) through the pressure relief mechanism (213) when the pressure relief mechanism (213) is actuated, wherein the first passage (15) is used to discharge the emissions discharged from the pressure relief mechanism (213) into the electrical cavity (11a), and the second passage (16) is used to discharge the emissions discharged from the pressure relief mechanism (213) out of the electrical cavity (11a). The battery and the electrical device of the embodiments of the present application can improve the safety of batteries.