Battery Disconnect Housing With Heat-Triggered Fire Suppressant Release
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Solution Overview
Problem
Conventional battery disconnect units fail to effectively extinguish and prevent the spread of fires in battery packs, leading to thermal runaway and structural damage, which compromises the stability and safety of the battery pack.
Innovation Solution
A battery disconnect unit with a housing containing fire extinguishing liquid and a fire-resistant silicone cover that prevents ejection below a preset temperature, allowing the liquid to flow and extinguish fires at higher temperatures, thereby delaying thermal runaway and suppressing fire spread.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the cover is made of fire-resistant silicone, then temperature resistance is improved, but the cover must undergo phase change at preset temperature to enable liquid flow
Solution Approach 1:
The cover utilizes phase transition of fire-resistant silicone material. At normal temperatures, the silicone remains soft and elastic. At or above preset temperature (e.g., 200°C), the silicone undergoes phase change and hardens, transforming from a blocking state to an ejection-enabling state.
Solution Approach 2:
The fire-resistant silicone cover exhibits thermal expansion and hardening behavior. As temperature increases to preset levels, the material expands and hardens, creating structural changes that allow liquid passage while maintaining fire resistance.
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 effectively delays thermal runaway and prevents fire spread, maintaining the integrity of the battery disconnect unit and ensuring operating safety by continuously supplying fire extinguishing liquid and preventing the unit's destruction, thus enhancing the stability of the battery pack.
Implementation Method 1
The fire-resistant silicone may harden while swelling at the preset temperature or higher, thereby forming crevices therein
Implementation Method 2
The fire-resistant silicone may harden while swelling at the preset temperature or higher
Data Source
AI summary
A battery disconnect unit includes: a housing designed to accommodate an electrical component therein; and at least one cavity formed in a body of the housing for storing a fire extinguishing liquid. The fire extinguishing liquid stored in the cavity is prevented from being ejected to an outside of the housing under a condition below a preset temperature, and is ejected to the outside of the housing at the preset temperature or higher.