The demand for wireless charging in cage hoists stems from their specific working environment, safety requirements and operational characteristics.

High intrinsic safety requirements - explosion-proof and fireproof:

There may be accumulation of gas (methane) in high-risk environments such as coal mines. Any electric spark may cause a catastrophic explosion.

The wired charging interface is highly prone to generating sparks at the moment of plugging and unplugging, posing a significant safety hazard.

Wireless charging realizes "contactless energy transmission", completely eliminates the risk of sparks during plugging and unplugging, and meets the core elements of the intrinsic safety requirements for mining (Ex ib I Mb).

2. Harsh environments affect reliability - Sealing protection challenges:

The underground environment is filled with coal dust, rock powder, water vapor and even leaching water.

Traditional wired charging interfaces are exposed, making it very easy for dust and moisture to invade, leading to interface corrosion, oxidation, poor contact and even short circuits, which affects the reliability of power supply.

The shells of the transmitting end (primary) and receiving end (secondary) of the o wireless charging system can be easily made completely sealed (with high protection level IP68/IP69K), preventing dust and water from entering the internal circuits and magnetic coupling areas, ensuring long-term stable operation.

3. Dynamic operation Requirements - Solving the problem of "charging while on the move"

The o cage is a device that frequently moves up and down. Charging it at a fixed position requires a dedicated charging station and operation time, which affects the improvement efficiency.

There is a safety risk in conducting charging operations manually near the cage.

Wireless charging can be designed to perform non-contact and automated charging at fixed points along the cage's running path, such as the bottom of the well, the wellhead, and the waiting area of the parking lot. The cage can complete charging with a brief stop (even considering extremely low speed or short-term stop charging), without manual intervention, seamlessly integrated into the lifting cycle to improve efficiency.

4. Reduce wear and maintenance - Solve the problem of "plug and pull wear" :

Frequent plugging and unplugging of charging connectors can lead to physical wear and deformation of plugs/sockets, increasing maintenance costs and the risk of equipment failure.

Wireless charging avoids physical plugging and unplugging, significantly reducing mechanical wear on connectors and lowering maintenance frequency and costs.

5. System Safety Redundancy - Ensuring emergency power supply:

The o cage usually needs to be powered to supply key safety equipment (such as emergency lighting, backup communication equipment, personnel positioning beacons, anti-fall device status monitoring, etc.).

Reliable wireless charging can provide convenient and safe supplementary charging for the backup batteries of these critical systems, ensuring sufficient emergency power support in case of emergencies such as power outages.

6. Industry Development Trends - Enhancing Modernization/Intelligence Levels:

The intelligentization of mines is an inevitable trend. Contactless charging is one of the supporting infrastructures for achieving intelligent operation of the cage (such as automatic positioning, status monitoring, and unattended operation), providing a reliable energy guarantee foundation for more complex automated scenarios in the future.