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180407 RevB
Installation & Maintenance
Manual (IMM), ETX900-
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 ETX900-TSO
Summary of Contents for EarthX ETX900-TSO
- 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 4/07/2018 Update to limitations, 8/30/2018 DO-311A Updated elect.& mech. 11/24/2020 Installation sections;...
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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 ..................1 BMS .................... -
Page 4: Overview
Aircraft. This manual covers the TSO Article (Part) installation aspects for the ETX900-TSO Battery to be installed on 14 CFR part 23 Aircraft. Refer to AC 20-184 for full Aircraft installation guidance and requirements not the subject of this manual. - Page 5 L I T H I U M B A T T E R I E S The ETX900-TSO BMS has the following features; over-charge protection, over-discharged protection (completely draining the battery), excessive cranking protection, high temperature protection and short-circuit protection. The BMS was designed to Design Assurance Level (DAL), C (major).
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Page 6: Installation Requirements
14 CFR part 43 or the applicable airworthiness requirements. Below are the installation specific, in-service requirements as identified in EarthX’s AML STC process document 18114-03 and is not part of the TSO Part (LRU) specific certification under TSO-C179b: The maximum charge rating is 80 amps, so the aircraft alternator rated output must be 80 amps or less. - Page 7 E T X T S O L I T H I U M B A T T E R I E S Self-Discharge Rate <3%/month @ 25°C 800 / 390 amps Peak Power (Ipp), 23/-18 °C 600 / 365 amps Rated Power (Ipr), 23/-18 °C Max Continuous Discharge Amps (Discharging 100% of capacity)
- Page 8 E T X T S O L I T H I U M B A T T E R I E S...
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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 Discharge Curves Voltage is not a good indication of the state-of-charge in lithium batteries. 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 6.2A (.39C) 12.4A (.77C) 18.6A (1.16C) 90 100 110 120 130 140 150 160 Time (Minutes) Discharge Time Discharge Versus Temperature We use a similar Cold Cranking Amp test standard as the lead acid battery manufacturers (SAE test performed at 0°F, but 3 second discharge time vs 30 second). -
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 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. See the graph below for self-discharge rates (in % per month) versus temperature. -
Page 12: Installation
Use caution when handling the battery inside the aircraft around metallic structures. Battery Installation Location The ETX900-TSO is designed to be mounted in a variety of locations within the aircraft including the engine compartment, baggage compartment or cabin as long as the environmental condition in those locations do not exceed the battery’s specifications (see the specifications... -
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 (1/4” ID, 5/16” OD 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 Configure the digital input (contact input) as “active low”, “user defined alert” type. Fault Monitoring Connection to 12V LED (Part # 11MM12) Connect the LED’s red wire to a spare or existing fuse or breaker off the electrical bus.
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Page 16: Return To Service Checks (Tests)
E T X T S O L I T H I U M B A T T E R I E S Return to Service Checks (Tests) Follow these steps to check the battery operation prior to returning to or putting in service: 1. -
Page 17: Maintenance
This table shows typical charging times for the battery: Model Charging Amps Charging Time ETX900-TSO 5 amp (TM291 Charger) 3 hour 10 amp (TM275) 1.5 hour Lithium batteries have a very low self-discharge rate which means the battery, if disconnected from the aircraft, could “hold its charge”... -
Page 18: Storage
(step 2) plug the charger power cord into AC outlet. The charger should startup and go into the “Save” charging mode. If not contact EarthX technical 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 E T X T S O L I T H I U M B A T T E R I E S replaced. Over-charging (due to Slow Flashing Greater than Verify aircraft charging system is faulty charging system (5s on/5s off) 15.2V functioning.
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Page 21: Regulations / Standards
L I T H I U M B A T T E R I E S Regulations / Standards The ETX Hundred Series (ETX900-TSO), is designed and tested to the following safety regulations as outlined in: FAA Technical Standard Order – TSO-C179b ... -
Page 22: 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 23: Do-160 Environmental Qualification Form
B A T T E R I E S DO-160 Environmental Qualification Form The following table is the DO-160 testing Environmental Qualification form. Nomenclature: Rechargeable Lithium Battery System Model: ETX900-TSO TSO Number: Manufacturer’s Specification: N/A Manufacturer: EarthX Address: 1111 Diamond Valley Dr, Windsor, CO 80550 Revision &... - Page 24 E T X T S O L I T H I U M B A T T E R I E S Audio Frequency Conducted Equipment tested to Categories B Susceptibility Induced Signal Susceptibility Equipment tested to Categories B(CX) Radio Frequency Susceptibility Equipment tested for conducted susceptibility to Categories R and for radiated susceptibility to Category R...