SEPLOS POLO S 51.2V 100AH Battery System

Specifications and Installation Guide

Manufacturer: DONGGUAN SEPLOS TECHNOLOGY CO., LTD.

Introduction

This battery system is applicable for both home and commercial energy storage systems, assembled from 3.2V 50Ah lithium-iron-phosphate cells in a 16S1P configuration and accompanied by the SEPLOS Smart BMS. Each unit supports parallel connection of up to 16 packs for easy capacity expansion. Do not mix batteries of different brands or models in parallel.

Functions

Specifications

3.1 Appearance and Interface

The system features a modular design with clear interface ports. Dimensions are approximately 630.0 mm (width) x 470.0 mm (height) x 200.0 mm (depth).

3.2 Electrical Schematic

The electrical schematic illustrates the connection of the battery pack to the BMS (MCU), including voltage sampling, equalization, pre-charge module, current limiting module, discharge/charge MOS tubes, temperature sensors, communication module, and LCD module. It shows connections to B+, B-, P+, P-, and various signal lines.

3.3 Parameters

Parameter Specification
Energy Capacity (kWh) 5.12 kWh
Configuration 16S1P
Nominal Voltage (V) 51.2 V
Operating Voltage (V) 42 V ~ 58.4 V
Nominal Capacity (Ah) 100 Ah
Nominal Charging/Discharging Current (A) 50 A at 25 ± 2 °C
Maximum Charging Current 100 A at 25 ± 2 °C
Maximum Discharging Current 100 A at 25 ± 2 °C
Operating Temperature 0 ~ 40 °C (charging), -20 ~ 40 °C (discharging)
Max. Ambient Humidity (%) 5 ~ 80%
Altitude Limit (m) 0 - 3000 m
Cell Balancing Method Passive
Dimensions (mm) 630 x 470 x 270 mm
Storage Temperature and Humidity -10 °C ~ 35 °C (for up to one month of storage), 25±2°C (for storage exceeding one month) with 65% ± 20% RH
Weight 50 kg ± 5 %
Cycle Life 70% of standard capacity after 4800 cycles at 25 °C and 80% DOD (50 A charging and discharging current)
IP Protection Rating IP20
Communication Mode CAN & RS485
Certifications CE, RoHS, UN38.3, 2023/1542

Protection Parameters

3.4.1 Cell Overvoltage Protection Parameters

Function Status Item Default Configurable Range
Overvoltage Protection Warning Before Overvoltage Warning Before Overvoltage 3500 mV Cancel Warning Before Overvoltage - Overvoltage Protection
Cancel Warning Before Overvoltage 3400 mV 3000 mV - Warning Before Overvoltage
Protection Against Overvoltage Warning Before Undervoltage 2700 mV Undervoltage Protection - Cancel Warning Before Undervoltage
Cancel Warning Before Undervoltage 2900 mV Warning Before Undervoltage - 3300 mV
Overvoltage Protection Protection Against Overvoltage 3650 mV Warning Before Overvoltage - 4500 mV
Cancel Protection Against Overvoltage 3400 mV Cancel Warning Before Overvoltage - Protection Against Overvoltage
Recovery Condition for Overvoltage Protection N/A Cell voltage drops to the recovery threshold. Remaining capacity is less than 96% of the interrupted power supply. Both conditions must be met. Output current ≥ 1A.

3.4.2 Cell Undervoltage Protection Parameters

Function Status Item Default Configurable Range
Undervoltage Protection Protection Against Undervoltage 2500 mV 1500 mV - Recovery From Undervoltage
Cancel Protection Against Undervoltage 2700 mV Undervoltage Protection - Warning Before Undervoltage
Undervoltage Protection Condition N/A When an individual cell voltage drops below the protection threshold, the BMS maintains communication with the inverter for 1 minute and then shuts down. Input current ≥ 1A.

3.4.3 Battery Overvoltage Protection Parameters

Function Status Item Default Configurable Range
Battery Overvoltage Protection Warning Before Overvoltage Warning Before Overvoltage 56.0 V Cancel Warning Before Overvoltage - Protection Against Overvoltage
Cancel Warning Before Overvoltage 54.0 V 53.0 V - Warning Before Overvoltage
Protection Against Overvoltage Warning Before Undervoltage 43.2 V Protection Against Undervoltage - Cancel Warning Before Undervoltage
Cancel Warning Before Undervoltage 46.4 V Warning Before Undervoltage – 55.0 V
Protection Against Overvoltage Protection Against Overvoltage 57.6 V Warning Before Overvoltage – 60.0 V
Cancel Protection Against Overvoltage 54.0 V Cancel Warning Before Overvoltage - Protection Against Overvoltage
Recovery Conditions for Overvoltage Protection N/A 1. Cell voltage drops to the recovery threshold. 2. Remaining capacity is less than 96% of the interrupted power supply. Both conditions must be met. Output current ≥ 1A.

3.4.4 Battery Undervoltage Protection Parameters

Function Status Item Default Configurable Range
Battery Undervoltage Protection Protection Against Undervoltage 40.0 V 36.0 V - Recovery From Undervoltage
Cancel Protection Against Undervoltage 43.2 V Protection Against Undervoltage - Warning Before Undervoltage
Undervoltage Protection Condition N/A When the total voltage drops below the voltage protection threshold, the BMS maintains communication with the inverter for 1 minute and then shuts down. Input current ≥ 1A.

3.4.5 Cell High/Low Temperature Parameters (Charging)

Function Status Item Default Configurable Range
Cell Temperature (Charging Prohibited) Warning Before High Temperature 50 °C Cancel Warning Before High Temperature - Overheat Protection
Cancel Warning Before High Temperature 47 °C 35 °C - Warning Before High Temperature
Protection Against High Temperature (Charging) 55 °C Cancel Protection Against Overheating - 80 °C
Cancel Protection Against High Temperature 50 °C Cancel Warning Before High Temperature - Overheat Protection
Warning Before Low Temperature Warning Before Low Temperature (Charging) 2 °C Low Temperature Warning - Cancel Low Temperature Warning
Protection Against Low Temperature 5 °C Low Temperature Warning - 10 °C
Cancel Protection Against Low Temperature -10 °C -20 °C - Cancel Protection Against Low Temperature
Cancel Warning Before Low Temperature 0 °C Low Temperature Protection - Cancel Low Temperature Warning

3.4.6 Cell High/Low Temperature Parameters (Discharging)

Function Status Item Default Configurable Range
Cell Temperature (Discharging Prohibited) Warning Before High Temperature 52 °C Cancel Warning Before High Temperature - Overheat Protection
Cancel Warning Before High Temperature 47 °C 35 °C - Warning Before High Temperature
Protection Against High Temperature 55 °C Cancel Protection Against Overheating ~ 80 °C
Cancel Protection Against High Temperature 50 °C Cancel Warning Before High Temperature - Overheat Protection
Warning Before Low Temperature Warning Before Low Temperature -10 °C Low Temperature Protection - Cancel Warning Before Low Temperature
Protection Against Low Temperature 3 °C Low Temperature Warning - 10 °C
Cancel Protection Against Low Temperature -15 °C -30 °C - Cancel Protection Against Low Temperature
Cancel Warning Before Low Temperature 0 °C Low Temperature Protection - Cancel Warning Before Low Temperature

3.4.7 Ambient High/Low Temperature Parameters

Function Status Item Default Configurable Range
Ambient Temperature Protection Warning Before High Temperature 50 °C Cancel Warning Before High Temperature - Protection Against High Temperature
Cancel Warning Before High Temperature 47 °C -20 °C - Cancel Warning Before High Temperature
Protection Against High Temperature 60 °C Protection Against High Temperature - 80 °C
Cancel Protection Against High Temperature 55 °C Cancel Warning Before High Temperature - Protection Against High Temperature
Warning Before Low Temperature Warning Before Low Temperature 0 °C Low Temperature Protection - Cancel Warning Before Low Temperature
Cancel Warning Before Low Temperature 3 °C Low Temperature Warning - 60 °C
Protection Against Low Temperature -10 °C -30 °C - Cancel Warning Before Low Temperature
Cancel Protection Against Low Temperature 0 °C Low Temperature Protection - Cancel Warning Before Low Temperature

3.4.8 MOSFET Transistor High/Low Temperature Parameters

Function Status Item Default Configurable Range
MOSFET Temperature Warning Before High Temperature 90 °C Cancel Warning Before High Temperature - Protection Against High Temperature
Cancel Warning Before High Temperature 85 °C 60 °C - Warning Before High Temperature
Protection Against High Temperature Protection Against High Temperature 100 °C High Temperature Warning - 120 °C
Cancel Protection Against High Temperature 85 °C Cancel Warning Before High Temperature - Protection Against High Temperature

3.4.9 Charging Current Limit Parameters

Function Status Item Default Configurable Range
Current Limit (Charging) Active Current Limit OFF 10 A When charging current ≥ 10 A, the current limit is activated.
Passive Current Limit ON N/A If the charging current exceeds the warning value for overcurrent, the current limit is activated. Upon activation, the BMS will re-check the current and decide whether to maintain the current limit.
Charging Current Limit Time Delay 5 minutes N/A N/A

3.4.10 Charging Over Limit Parameters

Function Status Item Default Configurable Range
Warning Before Overcurrent (Charging) Warning Before Overcurrent 105 A Cancel Warning Before Overcurrent - Protection Against Overcurrent During Charging
Cancel Warning Before Overcurrent 95 A 0A - Warning Before Overcurrent During Charging
Overcurrent Protection (Charging) Overcurrent Protection 112 A 0A ~ 150 A
Overcurrent Protection Time Delay 10 s Configurable
Overcurrent Protection Recovery Conditions N/A The BMS detects any output discharge current. After 60 seconds, the protection automatically resets.
Effective Charging Current Charging Current (in) 1000 mA N/A
Effective Charging Current Charging Current (out) 700 mA N/A

3.4.11 Discharging Over Limit Parameters

Function Status Item Default Configurable Range
Warning Before Overcurrent (Discharging) Warning Before Overcurrent -105 A Overcurrent Protection - Cancel Warning Before Overcurrent
Cancel Warning Before Overcurrent -103 A Warning Before Overcurrent - 0A
Overcurrent Protection (Discharging) Overcurrent Protection -110 A Protection Against High Current During Discharging - 0A
Overcurrent Protection Time Delay 10 s Configurable
Overcurrent Protection Recovery Conditions N/A The BMS detects any input charging current. After 60 seconds, the protection automatically resets.

3.4.12 Transient (Peak) Overlimit Parameters

Function Status Item Default Configurable Range
Overcurrent Protection (Peak) Overcurrent Protection N/A -250 A Protection Against High Current During Discharging - 300 A
Time Delay for Peak Overcurrent ON 30 ms Configurable
Cancel Overcurrent Protection OFF N/A The BMS detects any input charging current. After 60 seconds, the protection automatically resets.
Overcurrent Fuse Number of Overcurrent Protection Cycles for Lockout 5 times Exceeding the number of overcurrent protection cycles.
Cancel Overcurrent Fuse Connect to Charger N/A N/A

3.4.13 Short Circuit Parameters

Function Status Item Default Configurable Range
Short Circuit Protection Short Circuit Protection and Time Delay ON N/A (Programmed in software, not adjustable) Cannot be turned off.
Cancel Short Circuit Protection N/A The BMS detects any input charging current. After 60 seconds, the protection automatically resets.
Short Circuit Fuse N/A Permanent short circuit in the output circuit.
Number of Short Circuit Protection Cycles for Lockout 5 times Exceeding the number of overcurrent protection cycles.
Effective Discharge Current Discharge Current (in) -1000 mA Connect to Charger
Effective Discharge Current Discharge Current (out) -700 mA N/A

3.4.14 Cell Balancing Parameters

Function Status Item Default Configurable Range
Cell Balancing (Equalization) Balancing in Standby Mode Balancing in Standby Mode N/A If no charging or discharging current flows, balancing in standby mode is activated.
Standby Time 10 hours Configurable
Charging Equalization N/A Charging equalization is activated when in charging or float charging state.
Activation Voltage 3350 mV Configurable
Activation Conditions for Cell Balancing Voltage Difference 30mV Configurable
End Voltage 20mV Configurable
Cell Failure Temperature N/A Based on temperature range without equalization (ambient temperature).
High Temperature 50 °C and above Configurable
Low Temperature 0 °C and below Configurable
Voltage Difference 500 mV and above Configurable
Recovery 300 mV and below Configurable

3.4.15 Remaining Capacity Parameters

Capacity Item Default Configurable Range
Nominal Capacity N/A 100 Ah 5-100 Ah
Remaining Capacity Calculated based on cell voltage N/A Configurable
Lower Limit of Normal Cycle Discharge 20% Configurable
Warning for Low Remaining Capacity N/A 15% Configurable

3.4.16 Other Parameters

Function Status Item Default Configurable Range
Pre-charge N/A 2000ms 0-5000 ms The "pre-charge" function is activated after BMS startup.
BMS in Standby Mode ON Longest Standby Time 48 hours (when not connected to charger; no charging in progress) N/A
Heating N/A Heating Start Temperature 10 °C Configurable
N/A Heating Stop Temperature 0 °C Configurable
Heating Function Activation ON N/A Upon connection to charger and reaching the set cell temperature, the heating function is activated. Heating is off in standby and discharge states.
External Switch OFF N/A N/A The BMS can be turned on/off via external switches in standby mode.
LCD Display ON N/A N/A Monitoring software for cell voltage, temperature, and current.
Charging Activation ON 1 minute Configurable The BMS shuts down due to undervoltage protection. Press the button to restore the protection status and activate output current.
Impedance Compensation Impedance on Connection Failure N/A 10mΩ Default value is between 8 and 9.
Impedance Compensation 1 N/A 0mΩ Battery connection cable impedance compensation.
Impedance Compensation 2 N/A 0mΩ 13

Communication

4.1 CAN Communication

The BMS transmits information via the CAN interface with a transmission rate of 500Kb/s. The CAN interface uses RJ45 (8p8c) connectors. The CAN connector communicates with the inverter. RS485 collects information about parallel batteries, and then CAN transmits battery information to the inverter/control center.

CAN Connector Pinout:

Pins Function
1, 2, 7, 8 NC (No Connection)
4 CAN-L
5 CAN-H
3, 6 GND (Ground)

4.2 RS485

The BMS can collect battery information through RS485 communication with a transmission rate of 19.2Kb/s. The RS485 interface also uses RJ45 (8p8c) connectors.

RS485 Connector Pinout:

PINS DEFINITION
1/8 RS485-B
2/7 RS485-A
3/6 GROUND
4/5 Internal Communication (NC)

4.3 Parallel Data Connection

When connecting batteries in parallel using RS485 connectors, the CAN connector acts as the main communication interface. End devices (inverters, regulators) can obtain the collected battery information via the CAN or RS485 interface. The parallel RS485 connection uses a standard network patch cable.

4.4 DIP Switch

DIP Address: If batteries are connected in parallel, the DIP address identifies each battery. The Seplos POLO-S battery with BMS version 3.0 features automatic DIP addressing, eliminating the need to set the battery via DIP switches. Refer to section 7.2 for more information on parallel operation of multiple batteries.

Working Modes

5.1 Charging Mode

When a charger is detected and its voltage is 0.5V higher than the battery voltage, the BMS activates the charging MOSFETs. Upon reaching the effective charging current, it switches to charging mode (refer to Table 3.3.10).

5.2 Discharging Mode

If a load is detected and the discharge current reaches the effective discharge current value, the BMS enters discharging mode.

5.3 Standby Mode

If the BMS system is not in charging or discharging mode, it enters standby mode.

5.4 Shutdown Mode

The BMS enters shutdown mode after 48 hours of normal standby mode or upon triggering undervoltage protection. To completely shut down the battery, use the main switch or an external switch.

Conditions for waking up from shutdown mode:

LED Indicator

6.1 LED Lights

The system includes one running indicator (green), one warning indicator (red), and four charge status indicators (green).

6.2 Capacity Indicators

The table below describes the LED status for charging and discharging based on capacity.

Status Capacity Charging Discharging
L4 L3 L2 L1 L4 L3 L2 L1
Charge Status 0-25% OFF OFF OFF Blinking OFF OFF OFF Green
25%-50% OFF OFF Blinking Green OFF OFF Green Green
50%-75% OFF Blinking Green Green OFF Green Green Green
≥75% Blinking Green Green Green Green Green Green Green
Operation Running Green Blinking

6.3 LED Signal Explanation

Explanation of LED blinking patterns:

Blinking Type LED On Time LED Off Time
Blinking A 0.25S 3.75S
Blinking B 0.5S 0.5S
Blinking C 0.5S 1.5S

6.4 Operating Status Indicators

The following table details the operating status indicators for the battery.

Battery Mode Operating Status Operation Alarm SOC (State of Charge) REMARK
Standby Mode Sleep OFF OFF OFF OFF OFF OFF OFF Standby Mode
In Operation Blinking A OFF OFF OFF OFF OFF Standby Mode
Charging In Operation Green OFF Based on remaining capacity Blinking LED B
Warning Before Overcurrent Green Blinking B Based on remaining capacity Blinking LED B
Overvoltage Protection Blinking A OFF OFF OFF OFF OFF
Thermal and Overcurrent Protection Blinking A OFF OFF OFF OFF OFF
Discharging In Operation Blinking C OFF Based on remaining capacity
Warning Blinking C Blinking C Based on remaining capacity
Thermal Protection, Overcurrent Protection, Short Circuit Protection RED OFF OFF OFF OFF OFF Discharge stopped and no action to force sleep after 48 hours when power is off.
Undervoltage Protection OFF OFF OFF OFF OFF No discharge

Installation Components

The following components are included with the battery system:

NO. Item Quantity Photo Description
1 Battery Box 1 KS A white rectangular unit with a display screen and control buttons.
2 Bottom Cover / Stand 1ks A flat white panel, possibly for mounting or as a base.
3 Caster Wheel 4ks A black and silver wheel with a mounting bracket, designed for mobility.
4 Top Cover 6ks A white panel, likely for covering the top of the battery unit.

Installation Instructions

6.6 Installation Guidelines

Check the battery status before installation.

7. Installation Instructions

7.1 Connecting Multiple Batteries

Turn off the battery before connecting. The diagram shows multiple battery units connected in series and parallel to an inverter.

7.2 DIP Settings

The Seplos POLO-S battery features the latest BMS version 3.0, enabling automatic addressing for parallel batteries. For automatic addressing, follow a consistent procedure when connecting data cables. The parallel cable used is a standard network patch cable.

7.3 Starting the Battery

The battery is started by briefly pressing the reset button with a thin object (e.g., pen tip, small screwdriver). After pressing, the battery starts, the display lights up, and an LED test is performed. To turn off the battery, press and hold the RESET button for a longer duration.

7.4 Communication Protocol Settings

The battery supports communication protocols for inverters. The table lists compatible inverters and their corresponding protocols:

Inverter Protocol Corresponding Protocol Switching Function
Pylon CAN Pylon_CAN
Growatt CAN Growatt_CAN
Goodwe CAN Goodwe_CAN
Sofar CAN Sofar_CAN
SMA CAN SMA_CAN
Victron CAN Victron_CAN
Studer CAN Studer_CAN
Ginlong CAN Ginlong_CAN
Voltronic RS485 Voltronic_485
SRNE RS485 SRNE_485
Growatt RS485 Growatt_485
Pylon RS485 Pylon_485
Deye RS485 Deye_485

The communication protocol is selected via the battery's display. The process involves navigating to the 'Protocol' submenu and selecting the desired CAN or RS485 protocol, for example, CAN for Victron inverters.

Safety Precautions

Technical Support

Importer in the Czech Republic:

Efteria, spol. s r.o., K Rybníku 378, 252 42 Jesenice

Email: info@battery-import.cz

Website: www.battery-import.cz

The batteries are manufactured in accordance with Regulation (EU) 2023/1542 of the European Parliament and of the Council on batteries and waste batteries.

Certifications: CE marking, RoHS compliance, UN38.3 certification.

Recycling Symbol: ♻️ (WEEE symbol - crossed-out wheeled bin)

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