Limitations of Wireless Charging
Disadvantages
- Health implications/ safety concerns.
- People are concerned of being exposed to large and potentially dangerous electromagnetic fields when using
these systems.
- Embedding charging coils into highways for continuous charging is technically feasible, but cost, efficiency and
radiation issues when transmitting high power remain insurmountable challenges.
- Lack of power efficiency at a transfer efficiency of 80–90 percent with resonance charging, 10–20 percent of
the power is lost.
- Lost energy turns into heat and a wireless charger can get quite warm during charging. Temperature increase
causes stress to the battery and reduces life.
- Although current devices are catagorized as non-ionizing radiation, the increasing amount of devices has led to
increased questions of prolonged exposure and saftey.
- Devices enabled with wireless technology constantly seek contact with a tower by transmitting signal busts -
even in standby mode. The transmit power is adjusted to the proximity to the tower and is higher in fringe
areas.
Applicability Limitations
Induction technology has limitations that have confined its mainstream appeal.
- It only allows for a single device to be charged per coil, making it clunky and relatively inefficient in today’s
multi-device world.
- Technology requires precise placement of the device to be charged so that the coils are aligned in order to
initiate and sustain the charging process.
Competing industrial standardizations.
- The two standards Qi and PMA use what is essentially the same technology but apply it with different
specifications, creating problems for the companies that must embed the technology in their products.
- In addition, the entrant of A4WP with a new Rezence Standard which harnesses magnetic resonance wireless
technology has redefined the direction in which key global players are headed.