FMA, Inc. Specification

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FMA, Inc. Specification

Customer: FMA OEM

Project Title: 12S OEM Battery Workstation for OEM Applications

Revision: 1.50

Document Updated: 09/09/2020 Project Description:

FMA 12S OEM Battery Maintenance Hardware is designed to support OEM commercial, battery powered applications requiring efficient maintenance of multi-cell, high capacity battery packs. The hardware is ready to support any known battery chemistry. As of the date of this document, the current firmware and the user interface are optimized for Lithium Ion packs of between 1s and 12s. In addition to basic functions of charge, pack monitoring, and pack cycling, support for high current discharge is available using an optional, external discharge load that may be connected when required and removed when not in use. Upon request, FMA, Inc. is available to supply custom firmware and PC Software tailored to meet the unique requirements of any program, battery chemistry or custom user experience that may be required. FMA, Inc.

will assist in developing a specification unique to the customer’s situation, author firmware and software changes, and work with the customer to fully test and qualify the custom solution.

The 12S OEM Battery Management hardware will be offered in three different packaging options:

1) STAND ALONE BENCHTOP BATTERY WORKSTATION (FMA Direct part number LC12S20ADC-MC-GTC) – as a small, stand-alone, benchtop model that requires a separate 24VDC Power Supply Unit, scaled to match the pack and system requirements. In this configuration, interconnects between the BWS and the battery pack will be facilitated by the largely standardized JST brand, XH series balance headers (required for charging lithium chemistry batteries) and Safety Banana Jacks. Most off-the-shelf battery packs are equipped with JST XH balance pigtails. As the 12S OEM BWS is a 2- port capable device, it will support charging:

a. Two separate packs in series - one pack of between 1s and 6s cells on port 1 and a second pack of between 1s and 6s cells on port 2. In this example, the 2 packs are independent (each pack includes one balance plug and one set of 2 main red/black pack wires). For best results the packs should be of similar capacity as the BWS will wire them together in series during operation. Important: Balance Port 1 must be fully populated with a 6s pack before a second 1s-6s pack may be connected to Balance Port 2.

b. One, unitized pack (two balance plugs and one set of 2 main red/black pack wires)

In either case, a or b, upon request, appropriate charge adapters may be designed to allow plug and play operation with the customer’s pack(s).

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12S OEM Benchtop Battery Workstation Packaging Option:

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2) CHARGE CASE (FMA Direct part number 12SOEMCHGCASE1000)- packaged in a heavy-duty, water-resistant “charge case” that will include a Meanwell brand RSP1600-24 24VDC Power Supply and appropriate AC input cable. The RSP1600-24 is a high-quality Power Supply that delivers extremely clean DC voltage to power the BWS and was selected to match the BWS when operated to its maximum power levels. This results in highly accurate, highly reliable, and fast charge times without sacrificing safety which is paramount for high voltage, high capacity batteries;

particularly lithium chemistry batteries. Following is a photograph of such a charge case as supplied to an existing customer:

12S OEM Battery Workstation Charge Case Packaging Option:

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3) AS INDIVIDUAL “DIY” COMPONENTS – fully tested individual components; 12SOEM ENGINE, GT CONTROLLER (GT SERIES USER INTERFACE), and optional EL1000SA (External Load required for high power discharge operation) available for custom case designs and other installations:

12S OEM Battery Management Individual “DIY” Components Packaging Option:

12SOEM “CHARGE ENGINE” (FMA Direct part number LC12S20ADC-MC-OTS):

GTC-ASSY (USER INTERFACE) (FMA Direct part number GTC-OTS-ASSY):

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EL1000 (FMA Direct part number EL1000-SA) (STAND-ALONE MODEL shown) :

The term “Battery Workstation”, or BWS as used above was chosen to illustrate that the device will be capable of supporting all the important tasks of battery maintenance, including, but not limited to the following:

• CHARGING BATTERY PACKS (OPERATION)

• DISCHARGING BATTERY PACKS TO MEASURE CAPACITY (OPERATION)

• DISCHARGING BATTERY PACKS IN PREPARATION FOR DISPOSAL (OPERATION)

• STORAGE CHARGING/DISCHARGING BATTERY PACKS TO NOMINAL 50% CAPACITY FOR SHORT OR LONG-TERM STORAGE (OPERATION)

• MONITORING INDIVIDUAL PARALLEL CELL VOLTAGES OF BATTERY PACKS AT THE PUSH OF A BUTTON (OPERATION)

• DISPLAYING INDIVIDUAL OR “PARALLEL” CELL AND PACK DATA SUCH AS PER- CELL VOLTAGE, CHARGE CURRENT, DISCHAGE CURRENT, INDIVIDUAL OR

“PARALLEL” CELL INTERNAL RESISTANCE (IR), CAPACITY PUT INTO OR TAKEN OUT OF A PACK IN REAL TIME, PER OPERATION (READOUT)

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The Battery Workstation will include a separate, integrated Controller for the user interface (UI), based on the Revolectrix brand, GT SERIES charger line. The GT SERIES offers a more traditional, straight-forward UI, includes a manual charge mode, as well as a preset mode of operation. The Controller includes a monochrome, bitmap LCD, a rotary encoder/selector wheel, and a back button for menu navigation. For more information about the GT SERIES and to download a user guide, please see the GT Series models at the following page:

http://www.revolectrix.com/chargers.html

It is important to note that FMA is designing the Battery Workstation hardware to handle essentially 2x the requirements of the device’s maximum power settings to assure reliability and longevity. For this reason, throughout this document, certain line items will read “(spec)” followed by “(goal)”. This means that the unit will be designed to achieve the line item “goal” but the “(goal)” will often exceed the actual “(spec)”

line item parameter which represents the maximum selectable setting during operation.

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7 1. General Specifications

Item Description Status Questions

1.1 Unit is a Dual Port, Battery Workstation capable of supporting either two 1s-6s Li battery packs (via internal series wiring) or one 1s-12s Li battery pack. Important: Balance Port 1 must be fully populated with a 6s pack before a second 1s-6s pack may be connected to Balance Port 2. For purposes of the application, the charge case will be wired accordingly. See item 1.3 for more details.

OK

1.2 Workstation will include 2 x JST XH series 7 position right-angle headers to support the following balance connector configurations:

11S & 12S Balance Adapter Pinning

OK

1.3 On the Battery Workstation, 2 Pack main wire outputs can connect via 4 Safety Banana Jacks, color-coded Black, Red, Black, Red. The two middle jacks are wired together with a 30A fuse in between. If a single pack will always be connected, only the outer banana jacks are used, the two

middle jacks need not be installed. See illustration below:

OK

Voltage

1 0.00

2 3.64

3 7.27

4 10.91

5 14.54

6 18.18

7 1 21.81

2 25.45 3 29.08 4 32.72 5 36.35 6 39.99

7 43.62 No Connect on 11S Pin

Connector 1 Connector 2

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8 1.4 For packaging option 2 (Charge Case) the charge

case will be equipped with a DSUB COMBO

“CHARGE OUTPUT” receptacle (female shell with male pins) mounted above the deck.

Connections between this DSUB COMBO

connector and the BWS will occur below the deck.

These connections include the BWS main positive and negative outputs, balance port 1 and balance port 2 connections, and a 3-wire thermistor for monitoring pack temperature during charge and discharge.

OK

1.5 For either packaging option 1 (stand-alone) or 2 (Charge Case) an 18-inch charge adapter PCBA will be developed to interconnect the Battery Packs to the BWS charge outputs. This adapter PCBA will support one or two balance connectors, the corresponding sex battery pack main plus/minus connector installed on the customer’s pack, and a battery pack thermistor. Appropriate interconnects between the charge adapter and the BWS will be included and will vary based on the packaging option chosen. To improve the user experience, all connectors for connecting the battery packs to the charge adapter PCBA will be via right-angle connectors mounted along the edge of the PCB opposite to where the wires solder. The charge adapter will be housed in an appropriate casing.

OK

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9 1.6 For packaging option 2, to support the optional

External Load for high current discharge, the charge case will be equipped with a second DSUB COMBO “EXTERNAL LOAD” plug (male shell with female pins) mounted above the deck.

Connections between this DSUB COMBO

connector and the BWS will occur below the deck as well. These connections include the BWS External Load positive and negative outputs and a 7-pin connector to support the interface between the BWS “Engine” and the External Load through which the Engine will control the External Load.

For packaging option 1, the optional External Load will plug directly into the red/black Safety Banana jacks and the 7-pin connector on the stand-alone BWS.

OK

1.7 The 3-wire thermistor will be inserted into or attached to the battery pack during charge and discharge. The thermistor will be used to monitor and control pack temperature such that the pack never exceeds 55 deg C. It will do this by throttling charge and/or discharge current to prevent an over- temp. condition.

OK

1.9 Integrated GT Controller Interface will provide the simplest user experience possible. Over the course of the design effort, customer will be involved in the design. Based on feedback from the customer, the user interface may be modified to better

accommodate the application and custom firmware may be provided.

OK

1.10 By default, current GT SERIES OPERATION options include Charge, Storage Charge, Discharge, and Monitor. Different charge rates are typically supported using different presets. The current firmware, optimized for LiIon chemistry always uses the same battery chemistry; therefore, a single

“hidden” preset will be hard-coded into the User Interface to simplify operation. Optionally, for an additional NRE charge, default operation can mimic standard GT SERIES OPERATION, or FMA can work with the customer to develop an entirely custom firmware solution tailored to the application and one or more battery chemistries.

OK

1.11 Currently, by default, when the user applies power to the charge case, the LCD will state “READY”.

When the user connects the battery pack, the pack will be auto-detected, and the LCD will change to the following, limited options: Normal Charge

OK

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10 (10A charge rate), Fast Charge (17A charge rate), Store Charge (charge/discharge to 50% capacity), Monitor (display individual Cell voltages), and Dispose (discharge safely to 3.20V for disposal).

1.13 High current discharge (up to 2KW) will require an optional External Load be connected to the Battery Workstation. For most applications, max. external discharge power will be standardized at 1KW.

Higher or lower max. discharge rates may be made available upon request.

OK

1.14 At the Battery Workstation, External Load will be connected via 2 additional Safety Banana Jacks (black/red) as well as an additional multi-pin port to support fan power and control and a slipstream- mounted thermistor used to monitor and control exhausted cooling air such that the air never exceeds a 200 deg F safe temperature level. As with pack temp., unit will do this by throttling discharge current to prevent over-temp. condition.

OK

1.15 In the current firmware, to reduce user error, programmable set points for charge and discharge currents, min. and max. per-parallel-cell voltages, pack capacity, and other parameters will be stored in the single charger preset; however, the end-user will have no ability to alter preset parameters. The presets will be locked down such that only

authorized personnel can alter, save down, or upload presets to or from a Windows-based Utility program. Unless customer requires access to preset parameters, this will be handled as a production process. For more information, see 1.21 below.

OK

1.16 The Integrated GT Controller will communicate all details about the connected pack to the charge

“ENGINE” based on settings stored in the custom preset. The charge “ENGINE” will then

automatically detect pack cell count, set and monitor charge/discharge current throughout the selected process beginning with Constant Current and moving on to Constant Voltage which is the required method for managing Li batteries. Of course, if unit is required to support other chemistry batteries, algorithms appropriate to those

chemistries will be implemented; e.g., delta peak detection for Ni chemistry, etc.

OK

1.17 The BWS will protect against all the failure modes described on pages 28 and 29 of the GT1000 User Guide. The LCD will display the Safety Code and Message detailed therein. Additionally, the

OK

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11 following new Safety messages will be required to cover features not available in the GT1000:

1) Balance 1 and 2 connections swapped.

2) Discharge load thermistor not connected.

3) Discharge load temperature sensing failed.

4) Discharge load temperature too high.

5) Discharge load not connected.

6) Discharge load over-current.

1.18 To initiate any Battery Management operation, user will rotate the encoder wheel to highlight one of the available processes outlined in 1.11, then depress the Encoder wheel to start the process.

OK

1.19 The charge ENGINE will, based on the preset settings, terminate the process at the precise, per- cell or per-parallel cell levels and notify the integrated GT Controller when the process is complete.

OK

1.20 The integrated GT Controller will then issue both visual and audio indications that the chosen process is complete. Should the user need to terminate a process early, he will press and hold the BACK button.

OK

1.21 The Preset method of operation does not support pack history; therefore, no data will be collected, stored in the unit, or uploaded for later analysis.

OK

1.22 External cable will be available for standard USB 2.0 support for Windows P.C. interconnectivity to allow firmware updates for both the integrated GT Controller as well as the charge ENGINE. In addition, the Windows Utility will support data export to CSV file format and allow access to the charger’s preset parameters.

OK

1.23 The unit will be designed to meet Industrial Standards and meet all points of this specification;

however, cost savings efforts will be utilized wherever possible so long as product quality is not compromised.

OK

1.24 The unit will be designed to be compact. OK 1.25 The unit will be designed to be light-weight, given

the power supply requirements (applies to packaging option 2)

OK

1.26 The dimensions of the Stand-Alone Battery

Workstation are estimated to be: 10.24 in. (260mm) L x 5.55 in. (141mm) W x TBD H

TBD

1.27 The unit weight of the Battery Workstation is estimated to be less than 4 lb.

TBD 1.28 For packaging option 2, the Battery Workstation

will be housed along with a Meanwell RSP1600-24

TBD

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12 Power Supply in one Nanuk NK925 (or similar) case. The Nanuk NK925 case includes storage compartments to house the optional external load, all cables, adapters, peripherals, and spare fuses 1.29 Charge case will be rugged, water-resistant, and

include weather-resistant seals, pressure relief valves, and cooling fans as necessary to maintain normal operating temperature over the range consistent with charging Lithium batteries. For more information, see section 10.

OK

1.30 Charger case will not be designed to operate under water or in heavy rain conditions. For storage, transport, and during times the charger or discharger is not in use, the Nanuk case will

provide complete environmental protection. When the case is open for use, access, cooling air inlet and outlet are to the open atmosphere of the facility and protection from precipitation must be provided.

OK

1.31 Charger case operation will require that the lid remain open during battery management

operations; particularly high-current discharge.

OK

1.32 The overall size of the charge case is 21.7" x 16.9"

x 8.5".

OK 1.33 The all-up weight of the charge case remains TBD;

however, the target weight is < 20 lb.

TBD

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13 2. Battery Workstation Power Section Specifications

2.1 Input Voltage, 10-24VDC Nominal OK

2.2 DC/DC Buck/Boost switching circuitry OK

2.3 Output Voltage, maximum 50.4V OK

2.4 Output (Charge) Current, 17A max (spec); 33A max (goal). For packaging option 2, the included PSU will be fixed at +24VDC output; therefore, max charge current will be fixed at 17A/860W

OK

2.5 Output (Charge) Current, selectable from 0.25A to 33A MAX in 0.25A increments.

OK 2.6 Balancing circuits current, 1A min., 2A max. OK 2.7 Power Consumption Charge, 860W max. @

24VDC.

OK 2.8 Input and Output reverse polarity protection OK 2.9 Each of the 2 ports will operate in series yet utilize

common power section (input DC/DC converter).

This will be transparent to the end-user.

OK

2.10 Each of the 2 ports will consume energy from the input power section simultaneously.

OK 2.11 Power Consumption External Discharge, 1KW

(spec); 2KW (goal) via External Load

OK

3. Battery Workstation Heat Sink and Cooling Specifications

3.1 2 x Aluminum, thin-finned heat sinks mounted internally in Battery Workstation used for cooling internal components.

OK

3.2 2 x 50mm +12VDC Fans mounted internally in Battery Workstation used for cooling internal components.

OK

3.3 2 x 80mm +24VDC Fans mounted in the deck of the charge case. Fans include removable dust covers for easy removal and cleaning in the field.

3.4 Charge case shall include ventilation system sufficient to allow charger/discharger to function across the full operational temperature range defined in Section 10.1.

OK

4. External Load Specifications

4.1 The discharge load shall be portable and self- contained.

OK 4.2 The load coil is 0.5 ohm nominal resistance + or

minus .05 ohm (Internal Resistance; IR)

OK 4.3 Control circuitry shall calibrate coil resistance on

start up to account for drift of IR with time.

OK

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14 4.4 Control circuitry shall exercise the following safety

measures:

4.4.1 Ensure that maximum wattage dissipated does not exceed 1000 watts (standard configuration) 4.4.2 Ensure that exhaust temperature does not exceed 200 Deg F.

4.4.3 Ensure that cooling fan speed does not fall below 75% of rated speed when operated at 12V DC.

OK

5. Interface Specifications

5.1 2.6", 128 x 64 pixels graphic LCD with white LED backlight.

OK

5.2 Piezo Speaker for audio indication OK

5.3 Rotary Encoder with built-in PB “select” switch OK 5.4 USB 2.0 included to support Windows Utility

software defined in 13.1.

OK

6. Battery Types Support Specifications (all but default LiPo/Li-Ion Available on request)

6.1 NiCd, 1-32 cells, hidden in current firmware OK 6.2 NiMH, 1-32 cells, hidden in current firmware OK

6.3 LiPo/Li-Ion, 1-12 cells (balanced) OK

6.4 LiFePO4, 1-12 cells (balanced) OK

6.5 Pb, 12V/24V/48V, hidden in current firmware OK

Note: Multi-chemistry support is not a requirement of the specification. To support battery chemistries other than Li-Ion, additional presets could be set up and made available at nominal NRE charges on request.

7. Charging Discharging Types/Algorithms Specifications

7.1 NiCd, Delta V Fallback with safeguards to prevent false peaking, Custom charge rates from 0.25A- 40A (goal) in 0.25A increments, hidden in current firmware

OK Not accessible in current Li firmware load; available at nominal NRE charges on request.

7.2 NiMH, Delta V Fallback with safeguards to prevent false peaking, Custom charge rates from 0.25A- 40A (goal) in 0.25A increments, hidden in current firmware

7.3 Li current limited/constant voltage charging for balanced Li at programmable charge rates from 0.25A to 33A (goal) in 0.25A increments.

OK

7.4 Pb current limited/constant voltage charging, 0.25A to 33A, hidden in current firmware

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15 7.5 High current discharge via externally-connected

resistive load; cutoff voltages dependent on auto- detected cell count; max power 1KW (spec), 2KW (goal)

OK Maximum discharge current capability will vary

depending on number of cells in battery; current model limit set to 1KW power level.

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16 8. Interconnectivity Support Specifications (Packaging Option 2)

8.1 Wall power standard 120VAC cable receptacle;

example: Tyco 2-1609114-8, mounted to charger case back wired to +24VDC PSU. Not user accessible; under the deck

OK

8.1.1 Front panel mounted AC fuseholder, Eaton

BK/HTB-46I-R or equivalent, fitted with 20A fuse

OK 8.2 BWS DC Input Connector; EC5 Female; not user

accessible; under the deck

OK 8.3 Charging Case DC PSU Output Connector; EC5

Male; not user accessible; under the deck; M/F connection with above secured with a nylon tie.

OK

8.4 BWS Output (Charge) Balancing Connectors Port 1, JST XH Male, 7 position, Right-Angle; terminate to Norcomp 680S21WA4PL401 female housing with male pins connector, pins 1-7 above deck.

This interconnect will be accomplished using a 7P JST XH receptacle-to-bare wire pigtail.

OK

8.5 BWS Output (Charge) Balancing Connectors Port 2, JST XH Male, 7 position, Right-Angle; terminate to Norcomp 680S21WA4PL401 female housing with male pins connector (same connector as 8.4 above), pins 8-14 above deck. This interconnect will be accomplished using a 7P JST XH

receptacle-to-bare wire pigtail.

OK

8.6 BWS Output (Charge) Power Connectors, Safety Banana Jacks, color coded Black, Red; terminate to Norcomp 680S21WA4PL401 female housing with male pins connector (same connector as 8.4/8.5 above), pins A1, A4 above deck.

OK

8.7 (18”) Battery Charge Adapter includes Norcomp 680M21WA4SL401 male housing with female pins connector-to-ELCON MINI 3P RA

HEADER,SOLDER,STANDARD (TE Part # 2204529-2); wired as follows: PIN 1 is PACK +, PIN 2 is GND, PIN 3 is N/C. This Charge Adapter PCB will also include Ch 1 JST XH 7P R/A Header and Ch 2 JST XH 7P R/A Header to which the short balance pigtails of the battery pack will connect. The Ch 1 /Ch 2 headers will be clearly marked. This Charge Adapter PCBA will also include a 3P JST PA series polarized latching header for an OTS pack thermistor described in 8.8 below

OK

8.8 BWS Support for Epoxy Encapsulated Thermistor sensor via JST PA Male, 3 position, Right-Angle;

terminates into Norcomp 680S21WA4PL401 male

OK

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17 housing with female pins connector (same connector as 8.4/8.5/8.6 above), pins 15, 16, 17.

This interconnect will be accomplished using a 3P JST PA receptacle-to-bare wire pigtail.

8.9 BWS Output (External Load) Power Connectors, Safety Banana Jacks, color coded Black, Red;

terminate to Norcomp 680M13W3203L401 male housing with female pins connector, pins A1, A3 above deck.

OK

8.10 BWS Discharge Load Temperature and Fan Control Connector, JST PA Male, 7 position, Right-Angle; terminate to Norcomp

680M13W3203L401 male housing with female pins connector (same connector as 8.9 above), pins 1-7 above deck. Mating connector cable assembly made using Norcomp 680M13W3103L401 will exit the External Load.

OK

8.11 BWS USB Support - GT Controller Mini USB jack exits at rear of GT Controller Plastic Housing under the deck. A 6 foot long USB Micro-to-USB A cable will be cut at 18” from the USB Micro plug end. The wire will be stripped and the individual conductors will be twisted, solder tinned, and soldered to Amphenol Connector PN: PT02E-10- 6S using the following pinouts:

A VBUS (+5V, red) B Data- (white) C Data+ (green) D Ground (black) E Shield

F No Connection

The remaining 5.5 foot, USB A plug end of the same cable will be prepared and soldered to the mating Amphenol PT06E-10-6P(SR)-ND using matching pinouts.

OK

8.12 DSUB Combo style connectors will be fitted with ITT-Cannon (D110278, D110277) so that no tools are required to assemble the cabling onto the unit.

OK

8.13 Appropriate DSUB dust covers will also be

provided to provide protection and prevent shorting while mating connections are not inserted.

OK

9. Tolerance Specifications

9.1 Fuel gauge will be accurate to +/-10% OK 9.2 Charge current is factory calibrated on a 4A

standard.

OK 9.3 Current sense resistor used to measure current. OK

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18 10. Environmental Conditions

10.1 Charging and discharging will be performed in a fixed, land-based facility, in a controlled

environment between 32°F and 90°F (0-32C).

Charging/discharging will not be in proximity to aviation fuel or other explosive environment (fuel vapor). The design will perform in the

environment and protect cells at cold temps by sensing pack temperature and automatically reducing per-cell end-of-charge voltage to 4.10V.

Based on experience, FMA recommends Cold Weather temp be a programmable value in the preset and set initially to 32 deg F.

OK

10.2 Operations will take place 0-10,000 ft MSL.

System cooling and power supply are rated for the spec range.

OK

10.3 Operations may be at 10-90% relative humidity (non-condensing). Since the facility will be environmentally controlled, the system will not encounter relative humidity 90%, but will perform properly as long as no condensation is encountered.

OK

10.4 Capable of storage at -40 to+85 C; non-operating OK

OK 10.5 Capable of transport at up to 40,000 ft MSL; non-

operating OK

OK 10.6 Capable of transport at 10-95% RH; non-operating

OK

OK 10.7 It is assumed that the environmental control system

of the facility can absorb the 1000W heat load generated by the external discharger resistive load.

OK

10.8 No provisions for connection to external ducting are required.

OK 10.9 The discharge unit will be air cooled. OK 10.10 The external discharge load will be portable, self-

contained, and will fit inside the charging case.

Dimensions of the external load will not exceed 4"x4"x 6".

OK

10.11 High-temperature resistive elements will be acceptable as long as sufficient warnings are provided and the operator cannot be injured (burned) by touching a protective shroud component.

OK

10.12 Unit is air cooled and exhaust temp is limited to 230 Deg F/TBD Deg C. Caution placard to warn to stay clear of exhaust unless vented to outside.

OK

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19 10.13 Discharge will not be performed near an aircraft. A

dedicated charging/discharging area is envisioned.

OK 10.14 Warning instructions will be emplaced to warn

against charging/discharging in vicinity of volatile materials.

OK

11. Failure Mode and Effects Analysis and Actions

11.1 For the Battery Workstation, as well as for the External Load, during operations of Charge, Discharge, Storage Charge, or Dispose, unsafe conditions detected by the Charge Engine will shut down the operation and relay a Safety Code to the embedded GT Controller. This action is

accompanied by text on the LCD defining the Safety Code with either a number, a text

description, or both. Fans in the BWS and/or the External Load will continue to run for an additional 5 minutes. The unit then waits for the user to take corrective action and press the Navigation button to RESET. If the corrective action was unsuccessful, the same error will happen again causing the same results. The BWS will protect against all the failure modes described on pages 28 and 29 of the GT1000 User Guide. Additionally, the following new Safety messages will be required to cover features not available in the GT1000:

1) Balance 1 and 2 connections swapped.

2) Discharge load thermistor not connected.

3) Discharge load temperature sensing failed.

4) Discharge load temperature too high.

5) Discharge load not connected.

6) Discharge load over-current.

OK

12. Factory Testing

12.1 Factory testing is completed on 100% of units using custom, automated test hardware and PC software

OK

13. PC or Other Software

13.1 Windows P.C. Utility Software to allow firmware updates for both the integrated GT Controller as well as the charge ENGINE. In addition, the Windows Utility will support data export to CSV file format and allow access to the charger’s preset parameters.

OK

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21 Directions to Customer:

1. If the column titled Status above contains OK, then it has been approved by the FMA, Inc.

engineering team members.

2. If this column contains TBD, then additional efforts are required by our engineers before we can commit to this specification line item. These efforts are covered under an existing P.O. or contract and may include interfacing with the customer before a final decision is reached.

3. Should you, the customer note errors in any spec. line item, or disagree with the line item contents, please note your questions or concerns in the Questions column for that line item and we will work with you to resolve your concerns.

4. Upon signing the document, customer is acknowledging the specification is complete, accurate, and approved. At that time, the specification will be considered frozen and the real, detailed, design efforts will commence. Any changes requested after the spec. approval must be provided by the customer in a timely manner. If the changes represent substantial change to the ongoing developmental effort, those changes may be deemed outside the scope of the original P.O. or contract.

5. Should this occur, FMA has the option to stop work until the parties reach an understanding regarding how customer will compensate FMA for additional efforts not covered under this specification.

To acknowledge the above, and to approve the specification, please sign below and return a signed copy to FMA, Inc.

Customer Name: __________________________________________________

Authorized Contact Name: __________________________________________________

Authorized Contact Signature: _______________________________________________

Date Signed: ________________

14.