Battery Absorption Device for Fluid Leak Management
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Solution Overview
Problem
In battery systems for electric and hybrid vehicles, the liquid temperature-control system can escape during collisions, leading to potential short circuits when it comes into contact with battery cells, necessitating an effective absorption mechanism to manage fluid leaks.
Innovation Solution
A battery system with an absorption device featuring a support element that forms pockets between two material plies, allowing absorbing elements to be positioned effectively and securely fastened to the battery housing, ensuring fluid absorption and preventing short circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a liquid temperature-control system is used with effective thermal conduction, then temperature control performance is improved, but the risk of short circuits increases when fluid leaks occur
Solution Approach 1:
An absorption device is introduced as an intermediary component between the battery cells and the temperature-control system fluid. This device includes an absorbent material that can capture and retain leaked fluid, preventing direct contact between the conductive fluid and battery cells. The absorption device thus mediates the harmful interaction while allowing the temperature-control system to maintain its effective thermal conduction properties.
Solution Approach 2:
The absorption device is positioned in advance within the battery housing to cushion against potential fluid leakage. The absorbent material is pre-placed to intercept any fluid that escapes from the temperature-control system, providing a protective barrier before the fluid can reach the battery cells and cause short circuits.
2Reliability
If an absorption device is added to prevent short circuits, then operational reliability is improved, but device complexity increases
Solution Approach 1:
The absorption device utilizes a flexible membrane or thin film structure that can conform to the available space within the battery housing. This flexible construction allows the absorption device to be integrated into existing battery system designs without requiring substantial structural modifications, thereby limiting the increase in device complexity.
Solution Approach 2:
The absorption device employs relatively simple, cost-effective absorbent materials that can be easily replaced if necessary. By using inexpensive absorbent components, the overall complexity and cost of the battery system are minimized while still providing the necessary protection against fluid leakage.
3Reliability
If absorbing elements are positioned in pockets between material plies, then absorption effectiveness is improved, but manufacturing complexity increases
Solution Approach 1:
The pockets for receiving absorbing elements are pre-formed within the structure of the absorption device during manufacturing. This preliminary formation of pockets allows absorbing elements to be easily inserted and positioned correctly without requiring complex assembly operations, thereby maintaining ease of manufacture while achieving effective absorption.
Solution Approach 2:
The absorbing elements are nested within the pockets formed between the first and second material plies. This nested structure allows the absorbing elements to be securely held in place while maintaining a compact overall design, simplifying both manufacturing and assembly processes.
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 absorption device effectively captures escaped fluids, enhancing the operational reliability of battery systems by preventing short circuits and ensuring temperature control within the desired range, while being cost-effective and easy to produce.
Implementation Method 1
an absorption device arranged in the battery housing to absorb fluid that has escaped into the housing
Implementation Method 2
The first and/or the second material ply may be fluid-permeable. Both material plies may be fluid-permeable such that a fluid may reach the absorbing elements on all sides in an unhindered manner
Data Source
AI summary
A battery system having a plurality of cells in a battery housing, and an absorption device arranged in the battery housing to absorbs fluid that has escaped in the battery housing.