Battery swapping has moved from pilot project to infrastructure. In India, a 2024 assessment by the Council on Energy, Environment and Water counted roughly 3,000 battery-swapping stations nationally alongside about 17,000 charging points, and networks such as Battery Smart and Honda’s e:Swap have since pushed past that. For a fleet operator the appeal is simple: the vehicle stops being the constraint on uptime, because a depleted pack is exchanged in minutes instead of charged in hours.
For anyone specifying the hardware, the interesting object is not the station — it is the pack. A swap pack is handled by drivers, dropped into docks, charged in racks and cycled far harder than a home storage battery. This guide covers the six things that decide whether a swap network works in year three.
A swap pack is not a small traction pack
A traction pack is designed around the vehicle. A swap pack is designed around a person, a dock and a rack, and those constraints are stricter:
- It gets lifted. Every day, often several times, sometimes by a driver who is not being careful. Mass is a design constraint, not a by-product.
- It gets connected and disconnected constantly. The connector is a wear part with a rated cycle life, and it will be the first thing to fail if it is undersized.
- It gets charged fast and often. Rack charging means multiple packs charging side by side in an enclosure with limited airflow.
- It is interchangeable. Every pack in the pool must behave identically, or the operator cannot promise a driver a working swap.
Energy and voltage: start from the route
Size the pack from the shift, not from the cell catalogue. The method is: energy per kilometre, multiplied by the distance covered between swaps, multiplied by a reserve factor for hills, load, battery ageing and headwind.
Published design ranges for swappable packs give a useful sanity check. Two-wheeler swap packs are commonly specified at roughly 1.5–2 kWh in the 10–12 kg class, and three-wheeler packs at roughly 3–5 kWh in the 15–20 kg class. If your calculated pack lands well outside those bands, either the route assumption or the swap strategy needs revisiting.
On voltage, e-rickshaws in South Asia are typically built around 60V or 72V nominal systems, while e-scooters commonly use 48V or 60V. Match the vehicle platform first — the pack has to talk to an existing controller and motor — and choose the string count from there.
The mechanical interface decides your downtime
- Latch and guide rails. The pack must seat the same way on the ten-thousandth insertion as on the first. Specify the insertion force and the alignment tolerance, and test them.
- Connector cycle life. Ask for the rated mate cycles and derate it. A connector rated at 10,000 cycles in a lab is a different proposition in a dusty depot.
- Handles. Positioned so the pack balances in one hand, and rated for the real weight with gloves on.
- Enclosure rating. IP54 is workable for a covered kiosk. Anything exposed to rain, dust or washdown needs IP65 or better, with the connector sealed in the mated position.
- Vibration and drop. Specify a vibration profile and a drop height, and require the test report rather than a verbal assurance.
BMS and telemetry: what an operator actually needs
A swap network lives or dies on knowing the state of every pack in the pool. At minimum the BMS should report cell-level voltage and temperature, pack current, and a state-of-charge estimate that stays accurate across the middle of the range, where it is hardest.
- Two communication paths. CAN to the vehicle controller, and RS485 or Modbus to the station so the rack knows what it is charging.
- An authentication handshake. A station should refuse a pack it does not recognise. Without this, one counterfeit or mismatched pack in the pool can damage a charger or a vehicle.
- Over-discharge protection for idle packs. Packs sitting in a rack for days still draw standby current. If the BMS lets them drift flat, they come back damaged.
- Serialisation. Every pack needs a unique identifier that ties to its cycle history, so warranty claims can be assessed on data rather than argument.
Certification and the rack you charge it in
UN38.3 test summaries and an MSDS are required to move lithium cells and packs by air or sea, and customs will ask for them. IEC 62133 is the usual reference for portable cells and batteries; IEC 62619 is the standard industrial buyers ask for as a target for larger packs. Confirm early which of these your destination market enforces, because retrofitting documentation after tooling is expensive.
One point that gets overlooked: the rack charger is part of the safety case. Several packs charging in a closed cabinet generate heat, and the pack’s own thermal design assumes it is not being cooked by its neighbours. Specify the rack’s airflow and temperature cut-off alongside the pack, not afterwards.
Commercial questions to settle before tooling
- Who owns the pack? In most swap models the network owns the batteries and the driver pays per swap or by subscription. That changes your warranty exposure completely.
- What is the warranty measured against? Calendar time, cycle count, or both. Get the number in writing, with the test conditions.
- What happens at end of life? A pack that has been swapped daily reaches its cycle limit in a defined number of years. Agree the replacement path now.
- MOQ, tooling and lead time. A custom enclosure needs tooling. Ask what the tooling cost is, who owns it, and what the lead time is on a repeat order rather than a first order.
How EcoDyny supplies it
We build swappable packs in the 60V and 72V classes with the latch, connector and enclosure configured for your dock, and BMS firmware matched across the pool. See the battery swapping packs range, the e-motorcycle and e-scooter batteries range, and the battery swapping network solution for how the pieces fit together.
Send us the vehicle platform, the route and the swap interval, and we will come back with a pack specification, the documentation package for your market, and a quotation. Request a quote.