The VisiTyre^TM Batteryless Advantage
_____________________________________________

VisiTyre's outstanding competitive advantage over all other tyre pressure monitoring systems presently being offered in the marketplace is its patented technology which eliminates all wheel module sensor batteries. The importance of eliminating sensor module batteries may be understood as follows:

Unlike all other TPMS sensors, VisiTyre's batteryless sensors have:

      Zero Maintenance;
      NO sensor battery (and thus no environmental disposal phase);
      NO need to be put into (and thus bring out of) hybernation;
      NO need for a TPMS Activation Tool/Magnet;
      NO requirement for a TPMS "Relearn Process" after wheel rotation;
      NO need for a Scan Tool (to Plug into OBD port).

US DOT NHTSA evaluations reveal that for battery powered TPMS sensors, each sensor battery will fail at least once during the vehicle's lifecycle and as the battery is non serviceable, it will cost up to US$100 per sensor to replace and refit complete wheel sensor modules . . .

Batteries are chemical systems which have limited lifetimes and performance, both of which are degraded by extreme cold and heat of North American and European climatic conditions. If battery failure occurs during warranty periods the OEM has a potential ‘cost liability time bomb’ in every new car which is fitted with battery powered sensors.

This cost must also take into account the potential liability of battery failures that lead to serious vehicle accident related injuries and or fatalities . . .

Typical "Button-Cell" battery of RF wheel module electronics - Note the
battery is non-serviceable due to PCB contacts welded to the battery
terminals; VisiTyre eliminates the battery altogether.

VisiTyre's sensor achieves a cost reduction and improved reliability by eliminating the battery from the sensor module. Sensor power is achieved using a close proximity electromagnetic coupling which eliminates the need for all sensor batteries. The VisiTyre Pick-up coil is shown in the following photograph:

VisiTyre Pick-up coil, shown withdrawn from its mounting cover and
equipped with high temperature silicon cable and waterproof connector.

Continuous data transmission is achieved using a modulation (backscatter) technique with the applied electromagnetic flux.

Visualization of the Magnetic Field of VisiTyre Caliper Pick up Coil
Photo: Paul Nylander University of California Irvine.

Conclusion: Battery TPMS require complex workshop support procedures involving setup/test tools [1]. Furthermore, all batteries will eventually fail resulting in safety and litigation issues as well as an environmentally sensitive battery disposal phase [2], [3]. Thus, the true and compelling measure of the VisiTyre batteryless OEM value proposition is the reduction of the total cost of ownership which is achieved by eliminating the sensor battery and its associated environmental problems and aftermarket and OEM overheads [4], [5].

_______________

References:

[1.]       VisiTyre Batteryless TPMS is Number One for Simplicity [PDF]

[2.]       The Problems with Batteries used in TPMS [PDF]

[3.]       MSDS for Lithium/Thionyl Chloride [PDF]

[4.]       Unintended Consequences of US TREAD Act Legislation [PDF]

[5.]       With VisiTyre these workshop "Learn Tool" & battery module procedures are no longer required    - Review this video of typically awkward battery TPMS module procedures & judge for yourself the cost and complexity that VisiTyre now makes redundant.