Solid-State Battery for Tyre Pressure Monitoring
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Solution Overview
Problem
Conventional tire pressure monitoring units face limitations in energy storage due to the low energy density of capacitors and the mechanical complexity required to withstand high acceleration forces, and batteries are limited by their lifespan and sealing needs.
Innovation Solution
A tire pressure monitoring unit employing a solid-state lithium-cobalt dioxide accumulator with polymer-ceramic composites and a capacitor for energy storage, allowing efficient energy storage and supply under extreme conditions, including low temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional liquid electrolyte batteries are used, then good energy storage density is achieved, but the battery cannot withstand high acceleration forces (6000 g) and requires mechanically complex sealing designs
Solution Approach 1:
The patent changes the physical state of the electrolyte from liquid to solid, fundamentally altering the battery's ability to withstand acceleration forces while maintaining energy storage density. This parameter change eliminates the need for complex sealing mechanisms.
Solution Approach 2:
The patent replaces the mechanical sealing system required for liquid electrolyte containment with a solid electrolyte that inherently resists leakage under extreme forces, substituting a complex mechanical solution with a materials-based solution.
2Device complexity
If capacitors are used for energy storage, then no sealing complexity is required, but energy storage density is comparatively low
Solution Approach 1:
The patent merges the advantages of both capacitor and battery designs by using a solid electrolyte that enables high energy storage density like batteries while eliminating the need for complex sealing like capacitors, creating a hybrid solution that combines the best features of both energy storage devices.
3Strength
If solid-state batteries are used, then high acceleration forces are withstood easily, but internal resistance increases significantly at temperatures below freezing
Solution Approach 1:
The patent uses composite materials, specifically polymer-ceramic composites, that combine the advantages of both materials: polymers provide flexibility and low-temperature performance, while ceramics provide high acceleration resistance and ionic conductivity. This composite approach resolves the contradiction between acceleration resistance and low-temperature reliability.
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 provides reliable and efficient energy storage and supply to the tire pressure monitoring unit, ensuring continuous operation across varying vehicle speeds and temperatures, while reducing mechanical complexity and extending service life.
Implementation Method 1
Solid-state batteries contain a solid electrolyte that acts as an ionic conductor, enabling an electric current between the two electrodes of the battery
Implementation Method 2
the energy supplied by the generator must be stored, for example, in a capacitor or a battery
Data Source
Figure 1
AI summary
The invention relates to a tyre pressure-monitoring unit for monitoring the pressure in a vehicle tyre, comprising a pressure sensor (1) for measuring the tyre pressure, a transmission unit (4) for wirelessly transmitting tyre pressure data, a generator (5) for generating electrical energy for the pressure sensor (1) and the transmission unit (4), and an accumulator for storing the generator the energy generated by the generator (5). According to the invention, the accumulator is a solid body accumulator (6).