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200407 Rev-
Installation & Maintenance
Manual (IMM), ETX680-
24-TSO Battery
Copyright© 2020 EarthX, Inc. All rights reserved. The information contained in this document is the property of EarthX, Inc.
EarthX reserves the right to make changes to its documents or products without notice. It is the responsibility of each user to
ensure that all applications of EarthX's products are as intended and safe based on conditions anticipated or encountered during
use. The EarthX logo is a trademark of EarthX, Inc
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Table of Contents
Related Manuals for EarthX ETX Series
Summary of Contents for EarthX ETX Series
- Page 1 Copyright© 2020 EarthX, Inc. All rights reserved. The information contained in this document is the property of EarthX, Inc. EarthX reserves the right to make changes to its documents or products without notice. It is the responsibility of each user to ensure that all applications of EarthX’s products are as intended and safe based on conditions anticipated or encountered during...
- Page 2 E T X S E R I E S L I T H I U M B A T T E R I E S Revision Log Description Date Created New 11/6/2020 I C O N K E Y Valuable information Caution...
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Page 3: Table Of Contents
E T X S E R I E S L I T H I U M B A T T E R I E S T able of Contents Revision Log ..................i Overview ................... 1 Technology Inside ................1 Battery Cells .................. -
Page 4: Overview
B A T T E R I E S Overview EarthX Lithium batteries are designed as a maintenance free replacement for the 24-volt lead-acid or lithium starter batteries. The Starting Battery (Function) is considered Primary in the electrical system for Category I and II part 23 Aircraft. The alternator charging system is considered secondary. -
Page 5: Physical Layer
E T X T S O L I T H I U M B A T T E R I E S The BMS has the following additional protective features; over-charge protection, over- discharged protection (completely draining the battery), excessive cranking protection, high temperature protection and short-circuit protection. -
Page 6: Protocol Definition
E T X T S O L I T H I U M B A T T E R I E S Parity: none Stop Bits: 1 Data Bits: 8 Protocol Definition The following defines the protocol message sequence periodically transmitted at every 5 seconds: Byte Description SYNC 1... -
Page 7: Installation Requirements
E T X T S O L I T H I U M B A T T E R I E S Installation Requirements “This article meets the minimum requirements of technical standard order (TSO) C179b. Installation of this article requires separate approval.” The article may be installed only according to 14 CFR part 43 or the applicable airworthiness requirements. - Page 8 E T X T S O L I T H I U M B A T T E R I E S Life (Charge cycles) 4000 cycles @ 1C discharge rate, 25°C (20% depth of discharge) 2000 cycles @10C discharge rate, 25°C (80% depth of discharge) Life (Years) Up to 6 Years...
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Page 9: Discharge Curves
E T X T S O L I T H I U M B A T T E R I E S Top View Discharge Curves The first graph below shows the state-of-charge versus voltage at a 1C discharge rate. Typically, lithium batteries require advanced methods like current counting to track the charge level. -
Page 10: Discharge Versus Temperature
E T X T S O L I T H I U M B A T T E R I E S Discharge Time Discharge Capacity Discharge Versus Temperature We use a similar Cold Cranking Amp test standard as the lead acid battery manufacturers (DO-311A IPP/IPR test performed at 0°F). -
Page 11: Self-Discharge Rates
E T X T S O L I T H I U M B A T T E R I E S Cranking Amps vs Temp Lithium Lead Acid Temp Deg C Self-discharge Rates The self-discharge rate is dependent on temperature. At high temperatures (>25°C), the cell internal resistance decreases so the self-discharge rate increases. -
Page 12: Installation
E T X T S O L I T H I U M B A T T E R I E S Installation The instruction given here is generic and is NOT the sole installation instruction for a particular aircraft. Appendix B has a block diagram of a typical installation. For a specific aircraft, refer to the documentation listed in the Appendix of the Instructions on Continued Air Worthiness (ICA) manual. -
Page 13: Battery Vent Installation
Be careful not to crush or restrict flow through the tubing. The minimum bend radius is 3”; tighter bends could cause the tubing to kink. Only EarthX supplied tubing should be used. The tubing is chemical resistant and rated for 500°F (Teflon tubing). - Page 14 E T X T S O L I T H I U M B A T T E R I E S To test the internal LED and or external LED, touch the fault monitoring wire to battery negative. The discrete output for external fault monitoring is a single wire with ¼” quick connect terminal. The ¼”...
- Page 15 E T X T S O L I T H I U M B A T T E R I E S Fault Monitoring Connection to Garmin EFIS Configure the digital input (contact input) as “active low”, “user defined alert” type. Fault Monitoring Connection to 24V LED Connect the LED’s red wire to a spare or existing fuse or breaker off the electrical bus.
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Page 16: Voltage Monitoring (If Applicable)
E T X T S O L I T H I U M B A T T E R I E S RS-232 Communications Connection Voltage Monitoring (if applicable) The table below shows the recommended user alerts based on voltages when in flight. This pertains to existing equipment, and is not applicable if existing low or high voltage alerts do not exist or are not adjustable. -
Page 17: Operating Instruction
E T X T S O L I T H I U M B A T T E R I E S Hold down hardware Operating Instruction See the ICA for operating instruction, or for a specific aircraft, refer to the instruction given in the STC like an Aircraft Flight Manual Supplement (AFMS). -
Page 18: Storage
“Reset” button on the charger for 20 seconds. The charger should start charging in the “Save” mode. It may require several attempts. If the battery still will not charge, contact EarthX tech support. If using a Ground Power Unit (GPU), the current rating or current setting SHALL NOT be more than the max charge rate stated on the battery label or in this manual. -
Page 19: Part Number Revision
For warranty replacement consideration, fill out the online warranty submission form located on the EarthX website. EarthX’ s acceptance of any items shipped to EarthX for warranty replacement shall not be deemed an admission that the item(s) are defective. For international warranty returns, customer will pay the shipping expenses. -
Page 20: Regulations / Standards
E T X T S O L I T H I U M B A T T E R I E S Regulations / Standards The ETX Hundred Series battery, is designed and tested to the following safety regulations as outlined in: ... -
Page 21: Do-311A Test Summary
E T X T S O L I T H I U M B A T T E R I E S Appendix A DO-311A Test Summary Test Description Section Reportable Information Physical Examination 2.4.4.1 Passed functional performance per DO-311A, Section 2.2.1.1 2.4.4.2 Passed functional performance per DO-311A,... -
Page 22: Do-160 Environmental Qualification Form
The following table is the DO-160 testing Environmental Qualification form. Nomenclature: Rechargeable Lithium Battery System Model: ETX680-24-TSO TSO Number: Manufacturer’s Specification: N/A Manufacturer: EarthX Address: 955 Merchant Ct, Windsor, CO 80550 Revision & Change Number of DO-160: G, Dec8, 2010 Date Tested: Oct 30, 2020 Conditions... -
Page 23: Block Diagram Of A Typical Installation
E T X T S O L I T H I U M B A T T E R I E S Induced Signal Susceptibility Equipment tested to Categories B(CX) Radio Frequency Susceptibility Equipment tested for conducted susceptibility to Categories Q and for radiated susceptibility to Category Q Radio Frequency Emission Equipment tested to Categories P...