Battery Prime RAK9156 Datasheet
Overview
Description
The Battery Prime RAK9156 is a compact LiFePO₄ battery system with an integrated MPPT solar charger, designed to provide reliable power for off-grid IoT deployments and outdoor applications.
By combining energy storage and solar charging management in one unit, RAK9156 simplifies the deployment of solar-powered gateways, sensors, and remote monitoring devices without requiring additional power management components.
With its robust design, wide operating temperature range, and outdoor-ready connectors, RAK9156 is suitable for applications such as solar-powered LoRaWAN®/IoT gateways, field communication systems, agricultural monitoring, weather stations, and environmental monitoring facilities.
Features
- 230.4 Wh Energy Capacity for off-grid IoT applications
- Built-in MPPT Solar Charger for simplified solar deployment
- Wide Temperature Support for outdoor environments
- RS485 Monitoring Interface for battery status monitoring
- IP Rating: IP67
- Low Self-Discharge for long-term storage
Specification and Functions
System Overview
The RAK9156 Battery Prime integrates a LiFePO₄ battery pack, Battery Management System (BMS), and MPPT solar charger into a single unit. It provides energy storage, solar charging management, and RS485 communication for off-grid IoT and outdoor applications.
The heating film automatically activates when the internal cell temperature falls below 0.5° C and deactivates when the temperature rises above 5° C.
Battery charging is disabled while the heating film is active.
Figure 1: Battery Prime Electrical
Figure 1: Block DiagramSpecifications
| Parameter | Value |
|---|---|
| Battery Type | LiFePO₄ (LFP) |
| Rated Voltage | 12.8 V |
| Rated Capacity | 18 Ah |
| Rated Energy | 230.4 Wh |
| Operating Voltage Range | 10.8 V ~ 14.4 V |
| Max. Continuous Charge Current | 9 A (Limited by the solar charger) |
| Max. Continuous Discharge Current | 9 A |
| PV Input Voltage (Typical) | 18 V |
| Max. PV Input Voltage | 30 V (Open-circuit voltage) |
| Solar Panel Power (Typical/Max) | 40 W / 130 W |
| Operating Temperature | Charging: 0° C ~ 55° C Discharging: -20° C ~ 58° C |
| Storage Temperature | 25±2° C |
| Operating Humidity | 20% ~ 80% RH |
| Transportation SOC | ≤ 40% |
| Maximum Cell Voltage Difference | ≤20 mV (SOC >10%; after resting for a minimum of 2 hours after charge or discharge) |
| Net Weight | Approx. 5 kg |
| Dimensions (W × D × H) | 317 × 200 × 84 mm (±2 mm) |
Hardware
Dimensions
The dimensions of RAK9156 are shown below. All dimensions are in millimeters (mm).
Figure 1: DimensionsInterface Overview
The RAK9156 provides interfaces for power control, solar charging input, load output, protective grounding, and battery monitoring.
Figure 1: Interface Overview| Interface | Description |
|---|---|
| ON/OFF | Turns the battery system on or off. ON (button pressed): The battery operates normally, with charging and discharging enabled. OFF (button released): The battery enters sleep mode, with charging and discharging disabled. Before disconnecting any cables, set the battery to OFF. Disconnect the PV Input cable first, followed by the Load cable. |
| OUTPUT | Provides DC output and RS485 communication for battery monitoring. |
| PV INPUT | Connects to a solar panel for battery charging through the integrated MPPT solar charger. |
| Ground Terminal | Provides a protective grounding connection. |
| Valve | Provides pressure relief protection for the battery enclosure. |
Output
The OUTPUT connector provides DC power output and RS485 communication for connecting external devices and monitoring battery status.
Connector Information
| Item | Specification |
|---|---|
| Socket Model | LP-16-J04SX-03-401 |
| Plug Model | LP-16-C04PE-02-001 |
| Protection | IP67 |
| Rated Current | 10 A |
| Contact Diameter | 1.5 mm × 4 |
Pin Definition
| Pin | Signal | Description |
|---|---|---|
| Pin 1 | P+ | Positive power output |
| Pin 2 | P- | Negative power output |
| Pin 3 | RS485 A | RS485 communication line A |
| Pin 4 | RS485 B | RS485 communication line B |
PV Input
The PV INPUT connector connects the battery system to a solar panel. The integrated MPPT solar charger manages solar energy input and charges the battery pack.
Connector Information
| Item | Specification |
|---|---|
| Socket Model | LP-16-J02SX-03-401 |
| Plug Model | LP-16-C02PE-02-001 |
| Protection | IP67 |
| Rated Current | 10 A |
| Contact Diameter | 1.5 mm × 2 |
Pin Definition
| Pin | Signal | Description |
|---|---|---|
| Pin 1 | PV+ | Positive solar input |
| Pin 2 | PV- | Negative solar input |
Environmental Characteristics
Transportation Requirements
During transportation, handle RAK9156 carefully to prevent damage.
- Protect the battery system from severe vibration, shock, direct sunlight, and rain.
- Do not drop, roll, invert, or apply heavy pressure to the product.
- Handle the product carefully during loading and unloading.
- Keep the battery system in a safe transportation position to prevent short circuits.
Storage Requirements
RAK9156 should be stored in a partially charged condition, typically at approximately 40% SOC.
Storage Conditions
| Parameter | Requirement |
|---|---|
| Storage SOC | Approximately 40% |
| Storage Temperature | 0° C to 25° C (constant temperature of 25° C recommended) |
| Storage Humidity | 0% RH to 75% RH |
| Maximum Altitude | <1500 m |
| Atmospheric Pressure | 86 kPa to 106 kPa |
This product must comply with the operating instructions. Any installation, maintenance and use of this product must strictly comply with the relevant safety regulations.
- Do not store or use the product at high temperatures. Keep it away from heat. Exposure to temperatures above the safe operating range can significantly degrade the product's performance and service life and may cause serious hazards, such as fire or explosion;
- Storage and use in environments with high static or high electromagnetic radiation is prohibited. Otherwise, the electronic components in this product may be damaged, which may cause safety hazards.
- Do not get wet or even soak in water. Otherwise, it may cause internal short circuit, loss of function or abnormal chemical reaction of the product, and cause fire, smoke, explosion and other accidents.
- If you find any abnormalities in smoking, fever, discoloration or deformation, or in use, storage, transportation and service, you should contact the professional department immediately to further observe and control the risks.
- Do not discard discarded products in fire or in hot furnaces. Waste batteries should be recycled by professional agencies or organizations.
- Do not place heavy objects on the product or stack products on top of each other, as this may cause scratches to the painted surface.
- Although the module is not a high-pressure energy storage device, non-professionals and improper operation and use may still cause serious consequences such as burning and explosion. The installation and maintenance of the battery system must be operated by professional technicians. The use must strictly abide by the relevant safety regulations; non-professionals are strictly prohibited to install, repair battery systems and abuse.
Storage Maintenance
For long-term storage:
- Recharge the battery once every 6 months under normal temperature conditions.
- After charging, adjust the SOC to approximately 40% if the product will continue to be stored for more than 6 months.
