Before contacting a supplier, an AMR fleet buyer should translate daily operations into a written energy requirement: measured average power draw, shift structure, charging windows, allowable depth of discharge, end-of-life capacity target, and physical envelope. This brief lets a supplier judge whether a proposed pack is a validated product or a design still needing engineering review. Because no GOTION JTM product records were supplied for this article, no rated specifications, cycle-life figures, certifications, or warranties can be stated here; treat every number below as a planning estimate you must confirm against documented datasheets.
Start With the Mission, Not the Cell
An autonomous mobile robot battery exists to keep vehicles available during planned shifts. Availability goals, not peak enthusiasm, drive sizing.
- List the duty cycle: runs per hour, payload, lift events, idle time
- Record average continuous draw rather than worst-case peaks
- Note ambient conditions in the operating area
- Define what a mid-shift stop actually costs the operation
Turn the Duty Cycle Into an Energy Budget
A working approach is to multiply average power by the longest interval between full charges, then add margin for usable-capacity limits and aging. The margin is an estimate, not a rated figure; the exact reserve depends on chemistry, discharge management, and thermal conditions that only supplier documentation can confirm.
- Base energy: average watts times hours between charges
- Reserve for partial-discharge operating limits
- Reserve for capacity fade over the service period
- Check the budget against auxiliary loads: compute, sensors, lighting, actuators
Decide Charging Strategy Early
The interval you size for depends entirely on when the robot can charge.
- Charge between shifts: size for the full shift plus reserve
- Short opportunity stops: size for the gap between stops
- Continuous operation with spare packs: size for the swap interval and plan swap logistics
Changing the strategy later can change the required energy substantially, so settle it before requesting quotes.
Match Voltage and Communication to the Platform
Voltage follows the drive and control system already on the robot; the buyer should not choose it independently. The battery must also speak the protocol the fleet manager expects.
- Confirm the platform's nominal voltage requirement
- Record average and peak current the system can draw
- Specify communication interfaces the vehicle controller supports
- Note any battery-health data the fleet software must receive
State the Tradeoffs Plainly
Every sizing decision exchanges one benefit for another.
- Larger pack: longer run time, but more mass, cost, and payload penalty
- Deeper discharge per cycle: more usable energy now, shorter service life later
- Faster charging: less downtime, but stricter thermal and cell management demands
- Custom format: better fit, longer qualification and lead time
Where the Evidence Gaps Are
Honest buyers separate what they know from what they assume.
- Measured power draw on your actual routes beats any generic estimate
- Cycle-life expectations require supplier test reports; do not accept them verbally
- Cold-warehouse or hot dock behavior needs stated operating limits, not assumptions
- Certification status must be verified document by document before ordering
No independent test data, installation references, or certification records were provided for this article, so none are claimed.
FAQ
#### Should I size for a new pack or an aging one?
Plan around the capacity the pack will still deliver near the end of its intended service period. Ask suppliers to state, in writing, how they define end of life.
#### Is a bigger pack always safer for availability?
Not necessarily. Extra mass can reduce payload, stress the drivetrain, and raise cost without solving a real runtime gap. Size to measured need plus a reasoned reserve.
#### What must I verify before a pilot order?
Request datasheets, test reports covering cycle and safety performance, transport documentation, and a written fit review against your envelope and charger setup.
Three Questions Worth Asking Any Supplier
- How does your pack's usable energy change over the service life I need?
- Which charge rates and temperature limits are documented, and under what test conditions?
- What communication and protection behavior is validated rather than planned?
What to Provide Next
Send the vehicle or equipment model, nominal voltage, measured or estimated average and peak draw, shift and charging schedule, compartment dimensions and weight limit, ambient temperature range, and required interfaces. Ask GOTION JTM for a technical fit review against that brief. That review, not this general guidance, determines whether a specific configuration suits your application; treat it as an engineering assessment rather than a guarantee of performance.