Parallel 20S 72V 100A Integrated BMS JNFN ANT 20PPB Dual Pack RS485 Bus
Product Details
72V 100A Integrated BMS
,20S Dual Pack BMS RS485
,Parallel 20S BMS with RS485 Bus
Two packs are better than one — until they start arguing. A vehicle that carries a second battery to extend range needs both packs to share current according to what each can actually deliver, and it needs a management arrangement that prevents a full pack from pushing current into a depleted one through the shared bus. The JNFN ANT 20PPB is a 20-series 72 V integrated BMS board with a parallel coordination function built into the communication layer, so a second pack can be added in the field without a separate controller.
Each board measures its own pack and publishes state of charge, available current and fault status on a shared RS485 link. Arbitration designates one board as the coordinator at power-up, and the pair then agree on a discharge split weighted by state of charge and internal resistance. If one pack develops a fault, it disconnects itself and signals the other, which continues supplying the vehicle rather than dropping the whole bus.
- Parallel Coordination over RS485: Up to four boards on one link negotiate a discharge split weighted by state of charge, which keeps a new pack from carrying an old one and prevents cross-circulation at rest.
- Graceful Degradation: A pack that faults disconnects itself and announces the event; the remaining packs continue supplying the vehicle instead of the whole bus going down.
- 100 A Continuous with 200 A Peak per Pack: Two boards in parallel give a 200 A capability in a package that fits the same enclosure as a single pack.
- Independent Charge Paths: Each pack charges through its own path, so a charger connected to one pack does not push current through the parallel bus into the other.
- IP65 Sealed, Coated Control Section: Mounted in the battery compartment of a utility vehicle, the board sees spray from washing and dust from unpaved service roads.
- CAN for the Vehicle Controller: The coordinator publishes a combined pack view on CAN, so the vehicle sees one battery with the summed capacity rather than two separate devices.
- Field-Addable Second Pack: Adding capacity later requires no firmware change, only an address setting and a link cable, which keeps a vehicle fleet upgradeable without returning it to the workshop.
| Compatible Chemistry | LiFePO4, Li-ion (NMC) |
|---|---|
| Series Count | 20S (16S variant available) |
| Nominal Pack Voltage | 72 V (60 V to 74 V working window) |
| Continuous Current | 100 A per pack |
| Peak Current | 200 A for 10 s per pack |
| Parallel Units | Up to 4 packs on one RS485 link |
| Balance Method | Passive balancing, 150 mA |
| Communication | RS485 coordination link, CAN to vehicle, Bluetooth 5.0 |
| Temperature Sensing | 4 x NTC 10 kOhm |
| Ingress Protection | IP65 sealed and coated |
| Dimensions | 164 x 92 x 26 mm |
| Operating Temperature | -20 °C to +55 °C |
Utility carts, low-speed shuttles and light electric trucks with a dual-pack layout are the primary fit, especially where the second pack is added after the first season of service. The board also suits retrofit range-extension projects where a builder wants to keep the original pack.
Fleet managers benefit from the graceful degradation behaviour, because a single pack fault no longer removes a vehicle from service, and from the combined CAN view, which keeps the vehicle controller unchanged.
Delivery includes the board, a labelled harness, four NTC probes, a coordination link cable and a wiring diagram. Each board is tested in a two-unit parallel configuration, including a simulated fault disconnect, before packing.
Mr. Yu
Sales Director
- Email: liangyu1@jnfnbms.com
- Tel: 18625172489
- WhatsApp: 8613424898729
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WeChat:
18625172489
