Battery Firefighting Pipe Layout to Reduce Condensation Shorts

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Solution Overview

Problem

Existing battery firefighting systems are prone to producing condensed water on the exterior of firefighting pipes due to temperature differences, which can cause short circuits in battery cells, leading to reduced battery performance and lifespan.

Innovation Solution

Incorporating a pressure relief mechanism in battery cells that activates to release internal pressure and temperature, coupled with a firefighting pipe system where one end is closed to prevent medium circulation, reducing condensation and facilitating timely firefighting medium discharge when needed.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a firefighting system is added to the battery to address thermal runaway, then battery safety is improved, but condensed water production on the firefighting pipe exterior increases, leading to short circuit risks

Engineering Contradiction:
Improvebattery safetyVSAvoidcondensed water production
Core Design Contradiction:
ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent inverts the traditional firefighting pipe design by closing one end of the pipe instead of leaving it open. This inversion prevents the firefighting medium from circulating through the pipe, thereby eliminating the temperature difference that causes condensation on the pipe exterior, while still maintaining the ability to discharge the medium directly into the battery cell when thermal runaway occurs

Inventive Principle:
Principle #13The other way round (Inversion)

Solution Approach 2:

The patent extracts the harmful circulation function from the firefighting pipe system. By removing the continuous flow capability and replacing it with a closed-end design that only discharges medium directly into the cell, the system eliminates the side effect of condensation while preserving the primary firefighting function

Inventive Principle:
Principle #2Taking out (Extraction)

2Loss of time

If the firefighting pipe allows medium circulation to maintain readiness, then firefighting response time is improved, but temperature difference increases, causing more condensation on the pipe exterior

Engineering Contradiction:
Improvefirefighting response timeVSAvoidtemperature difference
Core Design Contradiction:
Loss of timeVSTemperature

Solution Approach 1:

The patent inverts the traditional firefighting pipe design by closing one end of the pipe instead of leaving it open. This inversion prevents the firefighting medium from circulating through the pipe, thereby eliminating the temperature difference that causes condensation on the pipe exterior, while still maintaining the ability to discharge the medium directly into the battery cell when thermal runaway occurs

Inventive Principle:
Principle #13The other way round (Inversion)

Solution Approach 2:

The patent pre-fills the closed firefighting pipe with the firefighting medium during battery assembly. This preliminary action ensures the medium is already in position and ready for immediate discharge when thermal runaway occurs, eliminating the need for circulation to maintain readiness while ensuring rapid response capability

Inventive Principle:
Principle #10Preliminary action

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 solution effectively reduces the risk of short circuits by minimizing condensation on firefighting pipes and ensures timely firefighting, thereby prolonging battery service life and preventing thermal runaway.

Implementation Method 1

the pressure relief mechanism is configured to be actuated when internal pressure or temperature in the battery cell reaches a threshold, to release the internal pressure

Methodology Applied
Scientific EffectPressure relief: Depressurisation

Implementation Method 2

closure of the second end of the firefighting pipe can prevent the firefighting medium from circulating in the firefighting pipe, thereby reducing a difference between inside and outside temperatures of the firefighting pipe, and reducing condensed water produced on the exterior of the pipe wall

Methodology Applied
Scientific EffectCondensation reduction: Condensation

Data Source

PatentUS20250007091A1Battery, electric apparatus, and method and device for preparing battery
Publication Date: 2025.01.02 JIANGSU CONTEMPORARY AMPEREX TECH LTD
  • US20250007091A1 patent drawing
  • US20250007091A1 patent drawing
  • US20250007091A1 patent drawing

AI summary

A battery includes a battery cell provided with a pressure relief mechanism configured to be actuated in response to internal pressure or temperature in the battery cell reaching a threshold to release the internal pressure, a collection pipe configured to accommodate a firefighting medium, and a firefighting pipe configured to connect to the collection pipe to allow the firefighting medium to be fed to the firefighting pipe. The firefighting pipe is configured to discharge the firefighting medium toward the battery cell in response to the pressure relief mechanism being actuated. Two ends of the firefighting pipe are a first end and a second end respectively. The first end is configured to connect to the collection pipe to allow the firefighting medium to enter the firefighting pipe through the first end, and the second end is closed.