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Overkill Solar BMS Series User Manual

Overkill Solar BMS Series
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Overkill Solar BMS Instruction Manual
Version: 0.1.0
Date: August 31, 2020

Table of Contents

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Overkill Solar BMS Series Specifications

General IconGeneral
Short Circuit ProtectionYes
DimensionsVaries by model
WeightVaries by model
Nominal Voltage12V
Overcharge ProtectionYes
Over-discharge ProtectionYes
Temperature ProtectionYes
Communication InterfaceBluetooth, UART
Operating Temperature-20°C to 60°C
Protection FeaturesOvercharge, Over-discharge, Short Circuit, Overcurrent, Overtemperature

Summary

Building a Battery Pack with Overkill Solar BMS

Safety Precautions for Battery Pack Assembly

Lists essential safety measures to prevent hazards during battery pack assembly and operation.

Gathering Components for Battery Pack

Lists necessary components for building a battery pack, including cells, bus bars, and BMS.

Top Balancing Battery Cells

Explains the critical process of equalizing cell voltages before assembly for optimal performance.

Battery Pack Assembly Steps

Guides on arranging cells, connecting balance wires, and mounting the BMS.

Connecting Balance Wires to BMS

Details the process of crimping terminals and connecting balance wires to the BMS.

Preparing and Mounting the BMS

Guides on selecting BMS location and physically mounting it to the battery pack.

Installing the Temperature Sensor

Details the purpose, placement, and attachment of the temperature sensor for BMS monitoring.

BMS Connectivity Options

Covers Bluetooth and USB interfaces for BMS configuration and monitoring.

Bluetooth Module for BMS

Describes the optional Bluetooth module for BMS configuration and monitoring via mobile apps.

USB Interface for BMS

Details the USB interface for connecting the BMS to a computer for configuration and monitoring.

BMS Parameters Configuration

BMS Protection Parameters

Lists and explains various voltage, current, and temperature protection settings for the BMS.

Cycle Capacity for State of Charge

Used to calculate the state of charge based on actual measured battery capacity.

BMS Balance Parameters

Settings controlling the cell balancing behavior of the BMS.

Periodic Maintenance of Battery Pack

Troubleshooting and Frequently Asked Questions

Appendix A: Recommended Parameters

A.2 12V Pack, 4 Cell Configuration

Recommended BMS parameters for a 12V, 4-cell, 100Ah LiFePO4 battery pack.

A.3 12V Pack, 8 Cell Configuration

Recommended BMS parameters for a 12V, 8-cell battery pack.

A.4 24V Pack, 8 Cell Configuration

Recommended BMS parameters for a 24V, 8-cell battery pack.

A.5 24V Pack, 16 Cell Configuration

Recommended BMS parameters for a 24V, 16-cell battery pack.

Appendix B: BMS Calibration Procedures

B.1 Voltage Calibration

Step-by-step guide to calibrating the BMS voltage readings using a multimeter and app.

B.2 Current Calibration

Instructions on calibrating the BMS for accurate current readings.

B.2.1 Idle Current Calibration

Procedure for calibrating the BMS's idle current measurement.

B.2.2 Charge Current Calibration

Procedure for calibrating the BMS's charge current measurement.

B.2.3 Discharge Current Calibration

Procedure for calibrating the BMS's discharge current measurement.

Appendix C: Understanding Cell Balancing

Appendix D: BMS Specifications

Appendix E: BMS Application Usage

Appendix F: Wire and Lug Sizing

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