Round-the-clock mobile robot operation depends on charging during work, not long breaks for charging. The main strategies are opportunity top-ups, autonomous fast docking, wireless inductive charging at stops, and battery swapping. Autonomous mobile robots, or AMRs, are self-navigating platforms that move goods or clean floors. For them, uptime comes from matching charger type, battery chemistry, and fleet scheduling to actual idle time.
Table of Contents
- Top up during natural pauses
- How does fleet software assign charging?
- Should you dock, go wireless, or swap?
- When will opportunity charging fail?
Top up during natural pauses
Opportunity charging adds small amounts of energy during loading, queuing, or stockroom returns. According to Mobile Industrial Robots, the MiR1200 Pallet Jack uses this approach with a high-capacity battery for round-the-clock pallet moves. It carries up to 1,200 kg at 1.5 m/s with about 8 hours runtime between charges. Lithium-ion chemistry makes those short charges practical.
Brain Corp reports Tennant AMR scrubbers can charge at any state of charge, unlike flooded lead-acid, in Tennant lithium-ion announcement. The result is 25% to 60% more cleaning time depending on model, freeing staff for other tasks. MiR Support Portal guidance recommends programming top-ups during task gaps and stockroom returns. It also recommends one more charging-plus-staging position than robots. That spare slot keeps a 24/7 fleet available.
How does fleet software assign charging?
MiR Fleet software automatically sends idle robots to chargers or staging positions. According to the MiR Support Portal, it treats robots below 7% battery as emergencies, then ranks by availability, battery level, and travel distance, as described in automatic charging documentation.
This removes manual charging decisions from operators. Low robots get priority without waiting for a worker. Nearby robots with suitable charge fill staging spots.
Should you dock, go wireless, or swap?
Autonomous docking suits fleets with predictable breaks. According to Mobile Industrial Robots, the MiR Charge 48V station lets MiR250, MiR600 and MiR1350 robots dock alone, in MiR Charge 48V overview. It restores a full charge in about one hour from standard outlets. Wireless inductive charging fits stops that already happen.
Electropages reports mobile manipulators and AMRs can top up at pick or work stations during normal stops, maintaining energy without long interruptions. The robot charges while it works, rather than leaving work to charge. Throughput matters when choosing between methods. A June 2024 University of Nevada Reno warehouse-AMR review compared charging methods, as shown in warehouse charging review. It found inductive charging had the best throughput time, while swapping beat plug-in charging across price points.
When will opportunity charging fail?
According to Automated Warehouse, opportunity charging fails for fleets in constant motion with little idle time. Some battery chemistries also do not support partial charges.
Those operations need scheduled deep charges or spare-battery swapping instead. Watch for these conditions: Schedule a full charge window or keep swap batteries ready for those routes.
- Continuous travel with almost no stops
- Batteries that require full cycles
- Fewer charge spots than robots
