ARMY MIL-PRF-81757 21-2011 BATTERY RECHARGEABLE REPAIRABLE NICKEL CADMIUM VENTED 24-VOLT 13 AMPERE-HOUR BB-664 A.pdf

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1、AMSC N/A Page 1 of 14 FSC 6140 DISTRIBUTION STATEMENT A: Approved for public release; distribution is unlimited INCH-POUND MIL-PRF-81757/21(CR) 25 FEB 2011 PERFORMANCE SPECIFICATION SHEET BATTERY, RECHARGEABLE, REPAIRABLE, NICKEL CADMIUM, VENTED, 24-VOLT, 13 AMPERE-HOUR, BB-664/A This specification

2、is approved for use within Army CECOM Life Cycle Management Command, Department of the Army, and is available for use by all Departments and Agencies of the Department of Defense. The requirements for acquiring the product herein shall consist of this specification and MIL-PRF-81757. REQUIREMENTS 1.

3、 Part or identifying number. The part or identifying numbers (PIN) for the items covered by this specification sheet are as follows: PIN Description Figures M81757/21-1 BB-664/A Battery 1-4 M81757/21-2 Connector, Strap (common link) 5 M81757/21-3 Connector, Strap (curved link) 5 2. Dimensions and we

4、ight. The dimensions and weight of the battery (or cell) shall be as specified in 3.10.8 as modified herein and as shown on figure 1 herein. The weight of the battery shall be not greater than 27 pounds (12.2 kg). 3. Capacity. The minimum capacity of the battery shall be 13 ampere-hours (14.2 initia

5、lly). When tested as specified in MIL-PRF-81757, the test parameters and requirements of Table I herein shall apply. Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-81757/

6、21(CR) 2 TABLE I: Test parameters and requirements, BB-664/A battery Test Test Method Discharge Rate(A) 1/ Cut Off Voltage(V) 1/ Capacity (Ah) Minimum 1/ Initial capacity discharge 4.5.13 13 18 14.2 Humidity and Charge Retention 4.5.14 13 18 9.7 Shock 4.5.15 330 10 5.5 Vibration 4.5.16 330 10 5.5 Te

7、mperature Shock 4.5.17 13 18 13 Altitude 4.5.18 13 18 13 Twenty-second pulse discharge 4.5.20 330 10 5.5 Medium Rate Discharge and Operating Position 4.5.21 117 14.4 9.7 Cycle Life 4.5.23 Normal Rate (Cycle 1) 13 18 13 High Rate 330 10 3.7 Normal Rate (Cycle 100) 13 18 13 Normal Rate (Cycle 200) 13

8、18 13 1/ Test parameters and requirements cited herein supersede those in the general specification. 4. Electrical interface requirements. The BB-664/A battery shall have two connectors, located as described by Figure 1: a. Connector J1: a 2-contact MS3509-XX receptacle, qualified in accordance with

9、 specification MIL-PRF-18148 b. Connector J2: a 13-contact connector that meets the interface requirements of MS27505E11E35S 5. Cells. The BB-664/A shall include 19 each BB-475/A cells, PIN M81757/22-1. Cells shall be connected inside the BB-664/A battery using fifteen M81757/21-2 common links and o

10、ne M81757/21-3 curved link to connect to the positive MS3509 connector. 6. Cell links. The cell links used for connecting cells in series shall be copper with a cross-sectional area not less than 0.039 in2, with nickel plating that complies with SAE-AMS-QQ-N-290, Class 1, Grade E. Finish shall be sm

11、ooth and free of corrosion, pits, and blow-holes. 7. Wiring harness. The BB-664/A shall include 1 wiring harness, PIN M81757/23-1. 8. MIL-PRF-81757 variance. The battery shall comply with MIL-PRF-81757 except as follows. 8.1 Modify the following paragraphs: Copyright Communications - Electronics Com

12、mand Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-81757/21(CR) 3 3.6.2 Fasteners. After the phrase “free of any coating” add the following: “except as otherwise specified herein.” 3.7.2 Battery container and cover.

13、a. Delete the fifth sentence (“The cover shall be fittedthe container body.”). The BB-664/A requires a gap for ventilation (See Figure 2 and Figure Note 4 herein). b. Add the following: “When tested as specified in 4.5.10, the battery shall show no signs of KOH leakage or seepage after testing.” 3.7

14、.4 Latches. This requirement is not applicable to the BB-664/A battery. 3.7.5 Handles. This requirement is not applicable to the BB-664/A battery. 3.7.9 Connectors, intercell. This battery is designed for full maintenance; tamper-resistant fasteners shall not be used. 8.2 Add the following new parag

15、raph: “3.7.11.9 Shipping condition. All batteries shall be delivered complete with electrolyte to the proper level and completely discharged, but fully formed. Each battery shall be equipped with a shorting device across the output terminals.” 8.3 Add the following new paragraphs: “3.8.4.3.1 Additio

16、nal marking. In addition to the marking described by figures 2 and 3, the following marking shall appear on each battery: WARNING 1. Area around battery must be well ventilated and cover removed during charge. 2. Do not allow caustic electrolyte to contact body, clothing, tools, etc. If contact is m

17、ade wash immediately with water. Flush eyes with water only for 15 minutes and seek medical attention. CAUTION DO NOT USE ACID ELECTROLYTE Use 0.17 0.030 inch lettering for this marking Acid will permanently damage this battery. Avoid using tools which have been used on acid type storage batteries.

18、Consult technical manual before servicing. Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-81757/21(CR) 4 Use 0.09 0.030 lettering for this marking INSTRUCTION 1. Remove c

19、over and brush off white carbonate deposits with vents in place. 2. Remove shorting plug or spring. 3. Refer to charging instructions in applicable technical manuals. 4. After charge, allow 1-2 hour stand, remove cell vents and adjust electrolyte using distilled water to 1/4 inches above plates for

20、the cells. Replace cell vents and cover. 5. Periodically soak cell vents in distilled water. Use 0.09 0.030 lettering for this marking” “3.8.8 Warning Tags. Where shipping devices are furnished by the contractor, alkali resistant tags with strong alkali resistant nonmetallic cord shall indicate acti

21、on or actions to be taken by field personnel.” 8.4 Modify the following paragraph: 3.10.22 Constant voltage discharge. This requirement is not applicable to this battery. 8.5 Add the following new paragraphs: “3.10.31 Testing of wiring harness. When the wiring harness is subjected to either the wiri

22、ng harness temperature test or the electrolyte resistance test, the wiring harness shall exhibit the following: “a. Continuity. When tested as specified in 4.5.32, continuity results shall be as follows: (1) Test points of 4.5.32a: Continuity (2) Test points of 4.5.32b: Resistance (see paragraph 2f,

23、 MIL-PRF-81757/23) (3) Test points of 4.5.32c: Not less than 1.0 megohm. “b. There shall be no evidence of alkali migration into harness wires and components; breakdown of insulation; stripping of metal plating from connectors; corrosion of metal parts; nor cracking of potting compound. “c. The tran

24、sducer shall meet the requirements herein. “d. The thermoswitches shall close or open within the specified temperature ranges herein. “e. There shall be no mechanical failure of components. “f. There shall be no dimensional distortion beyond specified limits.” Copyright Communications - Electronics

25、Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-81757/21(CR) 5 “3.10.32 Heater blanket. The M81757/21-1 (BB-664/A) battery shall have a heater blanket consisting of three heater strips as described elsewhere in

26、 this specification sheet. It shall have a total power of 342 15 watts of heat uniformly delivered to the battery cells. When tested as specified in 4.5.34 installed in a M81757/21-1 (BB-664/A) battery, it shall be capable of raising the cell temperature from -54C (-65F) to -10C (+14F) in not less t

27、han one hour after the start of heating. Heater hot spot temperature shall not exceed 110C (230F). When tested as specified in 4.5.35, the heater shall demonstrate operation for 500 hours without deterioration or breakdown under visual examination or dielectric strength testing or change of resistan

28、ce.” VERIFICATION 1. MIL-PRF-81757 variance. The battery shall comply with MIL-PRF-81757 except as follows. 1.1 Modify the following paragraphs: 4.2.1 Inspection of batteries. a. Delete “tamper-resistant fasteners (see 3.7.9)” and replace with “two #8-32 UNC 2A screws and two M81757/1-8A spring tens

29、ion washers” b. Add: “In addition, one wiring harness, PIN M81757/23-1, shall be provided.” 4.5.3 Electrolyte resistance. Add the following at the end of the paragraph: “Functional testing shall consist of the connection continuity of harness test of MIL-PRF-81757/23.” 4.5.9 Handle strength test. No

30、t applicable to this battery. 4.5.10 Cover seal test. Delete in its entirety and replace with the following: “The following test shall be performed for the BB-664/A. Place an empty battery container on a clean dry surface and fill with 1.30 0.04 specific gravity KOH to within ” of the J1 connector o

31、pening. Allow to stand for not less than 24 hours. Battery containers shall meet the requirements of 3.7.2 as modified herein.” 4.5.12 Cell vent test. Add the following after the title: “This test shall be performed on all cells in a battery. Charge, immersion, and discharge steps shall be applied t

32、o single cells whenever testing cells separately from batteries.” 4.5.15 Shock test (basic design). Delete “Discharge the battery at the 9C-rate for 5 minutes. Measure the voltage of the battery at 5 minutes after the start of the discharge.” Replace with: “Discharge the battery at a constant curren

33、t of 330 amperes in three twenty-second pulses with 120 seconds of rest between pulses.” 4.5.16 Vibration test. Delete text in its entirety and replace with the following: “The following test shall be performed. Upon completion, batteries shall meet the requirements of 3.9. “a. Remove cover from eac

34、h battery. Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-81757/21(CR) 6 “b. Constant current charge each battery at the 1C rate. “c. Secure cover to each battery. “d. At

35、tach batteries to vibration equipment in the normal, upright position. “e. Connect battery output terminals to the test system. “f. Attach no less than two accelerometers to each battery in the direction of the vibration motion; use the spectral density average of accelerometers to control test leve

36、ls. “g. Subject batteries to the vibration test of MIL-STD-810, Method 514, Procedure I (Operational service), using Annex D parameters for Category 14, Helicopters, vibration parameters for General Materiel, fxvalues for Main Rotor of AH-64 (early). “h. Disconnect batteries from vibration equipment

37、; attach batteries to vibration equipment in a perpendicular axis. “i. repeat steps e through h for a total of 3 mutually perpendicular axes. “j. Each vibration period shall be not less than one hour. “k. Discharge batteries at the 0.1C rate during each vibration period; monitor battery voltage duri

38、ng discharge. “l. Upon completion of all three vibration periods, constant current charge batteries at the 1C rate. “m. Discharge batteries with three 20-second pulses of 330 amperes with 120 seconds of rest between pulses. “n. Examine batteries for the requirements of 3.9.” 4.5.18 Altitude test. Th

39、is test is required as described with the following exceptions: 1) For step b, use a test temperature of -1.1C in lieu of -40C 2) For step c, use a pressure that simulates 6,090 meters (19,980 ft.) of altitude in lieu of the 18,500 meters (60,700 ft.) pressure equivalent. 4.5.20 Twenty-second pulse

40、discharge test. This test is applicable. However, for step (c) use a constant current of 330 amperes in lieu of the sloping discharge rate. 4.5.22 Constant voltage discharge test. This test is not applicable to this battery. 4.5.23 Cycling test. Delete text in its entirety and replace with the follo

41、wing: “The following test shall be performed. “a. Cycle 1. Charge at a constant current at the C rate to 1.55 0.10 volts per cell, then 1.1 amperes for another three hours. Rest for one hour at open circuit. Then discharge at the normal rate specified herein to cut-off voltage. Copyright Communicati

42、ons - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-81757/21(CR) 7 “b. Cycle 2. Charge at a constant current at the C rate to 1.55 0.10 volts per cell, then 1.1 amperes for another three hours. Re

43、st for one hour at open circuit. Then discharge at the high rate specified herein for not less than 20 seconds, followed by 260 seconds of rest, then discharge for another 20 seconds at the rate specified. “c. Cycles 3-98. Charge at a constant current at the 1.5C rate to 1.55 0.10 volts per cell and

44、 rest for one hour at open circuit. Then discharge at the high rate specified herein for not less than 20 seconds, followed by not less than 260 seconds of rest, then discharge for another 20 seconds at the rate specified. “d. Cycle 99. Charge at a constant current at the 1.5C rate to 1.55 0.10 volt

45、s per cell and rest for one hour at open circuit. Then discharge at the high rate specified herein for not less than 20 seconds, followed by not less than 260 seconds of rest, then discharge for another 20 seconds at the rate specified. “e. Cycle 100. Repeat step a. “f. Cycle 101. Repeat step b. “g.

46、 Cycle 102 -198. Repeat step c. “h. Cycle 199. Repeat step d. “i. Cycle 200. Repeat step a. “NOTE: Water may be added on the 100th cycle. The amount of water added shall be recorded. Reconditioning is not allowed during the cycle life test.” 1.2 Add the following new paragraphs: “4.5.32 Wiring harne

47、ss temperature test. The following test shall be performed. After completion of testing, the wiring harnesses shall meet the requirements of 3.1 and 3.10.31. “a. Remove wiring harness from battery “b. Fixture the wiring harness so that an ohmmeter is connected across the terminals of the transducer

48、and all thermoswitches. Note: Thermoswitches S3 and S3A require monitoring of dual output. “c. Place the harness into an environmental chamber. “d. Set the chamber to reach a temperature within a range of +3.4 1.1C (38F); allow the test sample to stabilize for not less than 1 hour. “e. Set the chamb

49、er to ramp down the temperature to not less than -5.0C (23F) at a rate not greater than 1C per five minutes while monitoring the continuity of thermoswitches S3 and S3A continuously. “f. Once thermoswitches S3 and S3A change status, record the temperature and stop the temperature decrease. Copyright Communications - Electronics Command Provided by IHS under licen