This guide answers one question for Indian E-Rickshaw OEMs and battery-pack manufacturers: how do you choose the right continuous-current rating for the BMS? It focuses on DALY A-Series Smart BMS current selection.
Passenger E-Rickshaws can operate for long hours with frequent stop-start driving, changing passenger load, gradients and high ambient temperature. These conditions can make the battery-current profile more demanding than a simple cruising-current figure suggests.
This does not mean that every Indian E-Rickshaw should automatically use a larger BMS. It means the BMS should be checked against the most demanding intended legal operating condition, including maximum permitted load, route and temperature.
Motor power is useful background information, but it does not uniquely determine BMS current. Battery current also depends on pack voltage, controller limits, acceleration demand, vehicle mass, passenger load, gradients and drivetrain conditions.
Before choosing 80A, 100A, 150A or another current tier, confirm these four values:
✓ Controller maximum battery-side current
✓ Peak battery current
✓ Peak-current duration and frequency
If regenerative braking is used, also confirm the maximum regenerative charging current.
| Input | What to Check |
|---|---|
| Passenger load | Normal load and maximum permitted load |
| Route | Flat urban roads, repeated flyovers or gradients |
| Duty | Daily operating hours and stop-start frequency |
| Temperature | Maximum ambient temperature and battery-enclosure ventilation |
Do not use unlawful overloading as the design target. If field use is expected to be demanding, validate the current and thermal requirement using the vehicle’s permitted operating envelope and actual controller/load data.
DALY A-Series Smart BMS provides continuous-current options from 40A to 400A. For an E-Rickshaw project, the table below should be read as a current-selection ladder, not as a fixed vehicle-to-model recommendation.
| A-Series | Continuous Current | Selection Rule |
|---|---|---|
| AH | 40A / 60A | Consider only if the verified continuous-current requirement fits this tier. |
| AK | 80A / 100A | Check sustained current, controller limit and peak-current profile. |
| AM | 150A / 200A | Evaluate when the verified project requirement reaches this current tier. |
| AS | 250A / 300A / 400A | Use only for a verified higher-current requirement, not simply because the vehicle works under heavy duty. |
The continuous-current rating is only one part of final selection. Battery chemistry, exact series-cell count, peak-current capability, installation and thermal conditions must also match the selected product specification.
View DALY Smart BMS products →
Suppose an E-Rickshaw project is considering a 100A BMS. Do not approve the 100A option only because the vehicle is commonly described as a “100A application.” First confirm whether the expected continuous battery current stays within the product’s verified capability under the intended load and temperature, and whether the required peak current and duration are also supported.
If those conditions are not confirmed, the correct next step is not automatically to move to 150A. The correct next step is to complete the current and thermal data, then select the appropriate A-Series tier.
For Indian L-category EV projects within the scope of AIS-156, BMS safety functions are evaluated as part of the rechargeable electrical energy storage system (REESS). Amendment 3 identifies over-charge, over-discharge, over-temperature, overcurrent and short-circuit protection among the BMS safety features verified during REESS testing.
This article is about current sizing, not certification. Confirm the complete AIS-156 documentation and validation requirements separately for the vehicle and battery project.
Official MoRTH source: Amendment 3 to AIS-156 →
✓ Expected continuous battery current
✓ Controller maximum battery-side current
✓ Peak current and duration
✓ Maximum permitted passenger/load condition
✓ Route / gradient conditions
✓ Maximum ambient temperature and enclosure conditions
Send DALY the battery and controller current data. We can match the verified requirement to the appropriate A-Series Smart BMS tier and provide the relevant product specification and quotation.
Email: dalybms@dalyelec.com
Post time: Aug-28-2026
