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EarthX ETX400-24-TSO Product Manual

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220407
ETX400-24-TSO Product
Manual
Copyright© 2025 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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Summary of Contents for EarthX ETX400-24-TSO

  • Page 1 Copyright© 2025 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: Revision Log

    E T X 4 0 0 - 2 4 - T S O L I T H I U M B A T T E R Y Revision Log Description Date Created New 1/20/2025 I C O N K E Y ...

  • Page 3: Table Of Contents

    E T X 4 0 0 - 2 4 - T S O L I T H I U M B A T T E R Y T able of Contents Revision Log ..................i Overview ................... 1 Technology Inside ................1 Battery Cells ..................

  • Page 4: Overview

    B A T T E R Y 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 Part 23 Aircraft. The alternator charging system is considered secondary.
  • Page 5 (discharge current). Once the alternator is shutdown or fails and the voltage returns to < 30 volts, the BMS’s over-voltage protection automatically resets (allowing charge current). EarthX requires automatic over-voltage protection (crowbar or other means of shutoff) for alternator type charging systems.

  • Page 6: Installation Requirements

    E T X 4 0 0 - 2 4 - T S O L I T H I U M B A T T E R Y Charge limiting is automatically de-activated once the internal battery voltage reaches 27.5 volt. Heater The heater is automatically controlled based on battery use (discharge/charge), temperature and voltage.

  • Page 7: Specifications

    E T X 4 0 0 - 2 4 - T S O L I T H I U M B A T T E R Y • The battery should be secured in the existing battery box or battery holder as detailed in this manual or aircraft manufacturer’s manual.
  • Page 8 E T X 4 0 0 - 2 4 - T S O L I T H I U M B A T T E R Y Back View Top View...

  • Page 9: Discharge Curves

    E T X 4 0 0 - 2 4 - T S O L I T H I U M B A T T E R Y 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 4 0 0 - 2 4 - T S O L I T H I U M B A T T E R Y 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 4 0 0 - 2 4 - T S O L I T H I U M B A T T E R Y 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: Battery 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. • The vent tubing should be chemical resistant and rated for 500°F (i.e. EarthX typically supplies Teflon tubing).

  • Page 13: Fault Monitoring Installation

    E T X 4 0 0 - 2 4 - T S O L I T H I U M B A T T E R Y If required 90° elbows may be used to make small radius corners. Fittings must be brass, stainless, Teflon or other material with at least a 400 °F temperature rating (i.e.
  • Page 14 L I T H I U M B A T T E R Y Fault/Status Indicator (LED) Install Procedure (EarthX supplied LED) suitable location for the Fault/Status Indicator will be determined by the installer. One example is shown below, but aircraft will vary. Find an open area that will not interfere with other equipment and in plain view of the pilot.

  • Page 15: Rtd Temperature Monitoring

    E T X 4 0 0 - 2 4 - T S O L I T H I U M B A T T E R Y 4. Secure the LED Placard (1” x 3”) to the trim panel in close proximity to the LED.

  • Page 16: Operating Instruction

    E T X 4 0 0 - 2 4 - T S O L I T H I U M B A T T E R Y Note: this table pertains to existing voltage level warning equipment and is NOT associated with the Fault monitoring LED.

  • Page 17: Maintenance

    Inspection and testing is required annually. For more details, see the ICA. Warranty EarthX, Inc. (Manufacturer) warrants its lithium batteries (hereafter referred to as Battery or Batteries) to be free of defects in material and workmanship for a period of two years. A dealer is not authorized to issue a replacement battery without prior authorization from EarthX, Inc.

  • Page 18: Appendix I Do-311A And Do-160 Testing

    L I T H I U M B A T T E R Y 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, the customer will pay the shipping expenses.

  • Page 19: Environmental Qualification Form

    There is no deviation to the test requirements. If test is marked N/R, it is not required due to the battery construction or battery energy category. Environmental Qualification Form Nomenclature: Rechargeable Lithium Battery System Model: ETX400-24-TSO Manufacturer: EarthX Revision & Change Number of DO-160: G, Dec8, 2010 Date Tested: Oct 30, 2020...
  • Page 20 E T X 4 0 0 - 2 4 - T S O L I T H I U M B A T T E R Y Salt Fog Equipment tested to Categories X Magnetic Effect Equipment tested to Categories X, no test performed Power Input Equipment tested to Categories B(RX), loss of...

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