Battery Housing Piercing for Direct Extinguishing Agent Injection
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Solution Overview
Problem
Existing methods for extinguishing high-voltage batteries, such as those in motor vehicles, face challenges when the battery housing is sealed against water penetration, making it difficult to introduce extinguishing agents effectively, potentially leading to unnecessary damage to the vehicle and reduced heat dissipation during thermal breakthroughs.
Innovation Solution
A method involving an extinguishing device with a lance-like end region that pierces through the battery housing to introduce extinguishing agents directly into the interior, creating a through-opening and allowing for targeted discharging of battery cells without exposing the battery to water, using agents like water, powders, or gases to interrupt thermal reactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the battery housing is sealed against water penetration, then the battery is protected from water damage, but extinguishing agents cannot be introduced effectively into the battery interior
Solution Approach 1:
The housing wall is segmented into different functional regions: a sealed region for water protection and a piercable region for extinguishing agent introduction. The piercable region contains a pressure compensation element that can be selectively penetrated without compromising the overall sealed structure
Solution Approach 2:
A pressure compensation element acts as an intermediary component between the sealed housing and the external environment. This element can be pierced by the extinguishing device to allow agent introduction, while the rest of the housing remains sealed for water protection
2Object-affected harmful factors
If the entire motor vehicle is placed in a flood box for extinguishing, then fire can be suppressed, but unnecessary damage and destruction of the vehicle occurs
Solution Approach 1:
The extinguishing function is extracted from the general vehicle flooding approach. Instead of flooding the entire vehicle, only the battery housing is targeted with a dedicated extinguishing device that pierces the housing and introduces agent directly to the battery cells
Solution Approach 2:
The extinguishing action is localized to the battery housing and its immediate contents. The flood box is replaced by a targeted approach where extinguishing agent is introduced only where needed - inside the battery housing - rather than flooding the entire vehicle
3Temperature
If water is introduced into a flood box surrounding the battery, then heat absorption occurs, but heat dissipation is reduced due to the sealed housing
Solution Approach 1:
The housing is segmented into a sealed region that maintains thermal isolation and a piercable region that allows direct thermal contact between the extinguishing agent and battery cells, enabling effective heat dissipation without compromising overall sealing
Solution Approach 2:
The pressure compensation element serves as a controlled intermediary that allows thermal energy transfer when pierced, while the sealed housing structure maintains thermal isolation during normal operation
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
This approach enables effective cooling and neutralization of high-voltage batteries while maintaining the battery's original state, preventing unnecessary flooding and damage, and ensuring efficient heat dissipation by allowing a greater quantity of extinguishing agent to be introduced directly into the battery housing.
Implementation Method 1
heat absorption will only lead to a reduced heat dissipation in the environment of the flood box
Data Source
AI summary
A method for introducing at least one extinguishing agent into a battery, in particular into a high-voltage battery for a motor vehicle. The at least one extinguishing agent is introduced into a housing of the battery that is at least partially sealed against the penetration of water, in which a plurality of battery cells are arranged. For this purpose, a through-opening is created in a partial region of a wall of the housing, wherein the partial region is penetrated by means of an end region of an extinguishing device. At least one extinguishing agent is introduced into the housing of the battery through a supply channel of the extinguishing device. In addition, the invention relates to an extinguishing device.