25.2V 18.2Ah Custom NCM Lithium Battery Pack | 18650 7S7P

A 7S7P NCM Pack with an Integrated RS485 Interface

This 25.2V 18.2Ah custom NCM lithium battery pack uses 18650 cells in a 7S7P arrangement. Rated capacity is 18.2Ah at C5, minimum capacity is 17.2Ah and nominal energy is approximately 458.64Wh.

The reference photo shows a white plastic enclosure with mounting flanges and a recessed multipin connection. Specified weight is 2.8 ± 0.1kg. Enclosure dimensions are not provided in the parameter table; request the mechanical drawing before confirming battery-compartment or mounting-hole fit.

Datasheet Values for the 25.2V 18.2Ah Build

Electrical Strengths of the 18650 7S7P Build

• 18.2Ah capacity and 458.64Wh nominal energy. The 7S7P build provides a defined energy reference for OEM load and runtime review.
• Power and data contacts are documented. The supplied pin assignment separates positive and negative power contacts from the two RS485 signal contacts.
• Plastic enclosure with mounting features. The reference photograph shows mounting flanges; use the mechanical drawing to confirm dimensions and fastener positions.
• A specific cycle-life endpoint. The test specification states at least 1000 cycles with at least 70% capacity retention under its defined standard procedure.

How This Build Differs from Its Siblings

The 25.2V 2Ah 18650 7S1P pack shares the nominal voltage but uses a different parallel count and capacity. This 18.2Ah 7S7P version adds a plastic enclosure and an RS485 interface. Matching nominal voltage alone does not establish charger, connector, control or mechanical compatibility.

Duty, Charge and Temperature Limits

• Working load. The specified working discharge current is ≤18A. No separate higher peak-current allowance is given; review any startup demand against the approved pack specification.
• Charging. Use 29.3-29.4V with current no greater than 5.4A. The parameter table lists a 0.182-0.364A charge cut-off current. Charging is permitted only from 5°C to 45°C.
• Discharge and storage. Discharge from -20°C to 55°C, with ventilation and heat dissipation above 45°C. Store dry at 0°C to 40°C, preferably 15°C to 25°C.
• Cycle testing. The ≥1000-cycle, ≥70%-retention specification uses the standard procedure at 25 ± 2°C and 65 ± 20% RH, with C5 reference current and 0.5-1 hour rests.
• Pack topology. The specification prohibits connecting complete packs in series or parallel.

Connecting the Power Contacts and RS485 Pins

The supplied customer-plug assignment uses pins 1-5 for positive power and pins 8-12 for negative power. Pin 6 is RS485A and pin 7 is RS485B. The connector part number, mating hardware and communication protocol require confirmation for the installation.

1. Obtain the approved connector drawing and confirm which view defines the pin numbering.
2. Check pins 1-5 as the positive group and pins 8-12 as the negative group before applying power.
3. Connect RS485A to pin 6 and RS485B to pin 7 using the agreed host-interface design. Confirm protocol and baud rate; keep communication contacts separate from the power groups.
4. Verify charger compatibility with 29.3-29.4V and the ≤5.4A charge limit.
5. Review enclosure dimensions, mounting-hole locations and connector clearance on the mechanical drawing before approving the sample.

Devices That Match This Discharge Profile

Potential applications include OEM industrial DC equipment, monitoring platforms and control systems that require a 25.2V NCM battery with RS485 communication. Confirm a working load no greater than 18A, the 19.6V approximate discharge cut-off, the host protocol and the complete mechanical fit.

Technical Support & Model Matching

Send Surlon Power the device voltage range, continuous and time-limited load profile, runtime target, enclosure drawing, connector requirements and charging arrangement. Quote the Surlon website model SL-NCM-25.2V-18.2AH-7S7P when discussing this configuration. Review the proposed specification and an equipment sample before production approval. Explore the Custom NCM Lithium Battery Packs range for other reference builds.

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