Traction Battery Impact Detection with Sealed Pressure Chamber
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The challenge in designing an impact detection system for traction batteries in electric vehicles is the limited installation space and the difficulty in sealing an air-filled chamber to obtain reproducible pressure signal characteristics, which is crucial for detecting impacts and minimizing damage.
Innovation Solution
An impact detection device with an underbody element featuring an air-filled chamber sealed by a polyurethane material, coupled with a pressure hose and an insertion element that connects the pressure hose to the chamber, allowing for pressure changes to be detected by a pressure sensor, ensuring a reproducible pressure signal and maintaining the sensor at a distance from the chamber.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If an air-filled chamber is sealed to obtain reproducible pressure signal characteristics, then measurement precision is improved, but device complexity increases due to sealing difficulties
Solution Approach 1:
The patent introduces a sealing element as an intermediary component between the air-filled chamber and the external environment. This sealing element mediates the connection while maintaining the pressure seal, thus achieving reproducible pressure signals without overly complicating the device structure. The sealing element is integrated with the pressure sensor assembly, allowing pressure transmission while preventing leakage.
2Ease of operation
If the pressure sensor is arranged at a distance from the air-filled chamber due to limited space, then ease of operation is improved, but measurement precision deteriorates
Solution Approach 1:
The patent employs a pressure transmission medium (air or fluid) to transmit pressure signals from the air-filled chamber to the pressure sensor through a coupling element. This pneumatic/hydraulic transmission allows the sensor to be positioned at a distance from the chamber while maintaining measurement accuracy, as the pressure signal is transmitted through the sealed system without significant loss or distortion.
3Reliability
If the underbody element is designed to protect the traction battery, then reliability is improved, but object-affected harmful factors worsen due to impact forces being transmitted to the battery
Solution Approach 1:
The patent incorporates an air-filled chamber as a cushioning element between the underbody protective element and the traction battery. This air cushion absorbs and attenuates impact forces before they reach the battery, providing beforehand cushioning against potential damage. The compressible air volume acts as a shock absorber, reducing the transmission of harmful impact forces while maintaining protective coverage.
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 enables effective detection of impacts on the traction battery by providing reproducible pressure signal characteristics, preventing damage and ensuring the pressure sensor is arranged at a distance due to the limited space, while maintaining the integrity of the seal and preventing dirt and moisture from affecting the sensor.
Implementation Method 1
The chamber is coupled to a pressure sensor (6) via the pressure hose (6).
Data Source
Figure 1~2
Figure 3~5
AI summary
The invention relates to an impact detection device (2) for a traction battery (12) of a motor vehicle (1), comprising an underbody element (3) for the traction battery (12) and at least one air-filled chamber (4) formed on the underbody element (3), wherein the chamber (4) is sealed and defined at least laterally to the outside by a sealing material (5), and wherein the impact detection device (2) further comprises a pressure hose (6) and an insertion element (7) for the pressure hose (6), wherein the chamber (4) can be coupled to a pressure sensor via the pressure hose (6), and wherein the insertion element (7) is attached to the underbody element (3) and is configured to couple the pressure hose (6) to the chamber (4) at a predetermined position through the sealing material (5), wherein the insertion element (7) is embedded by the sealing material (5) to seal the chamber (4).