ARMY MIL-PRF-81757 19-2011 BATTERY RECHARGEABLE REPAIRABLE NICKEL CADMIUM VENTED 24-VOLT 10 AMPERE-HOUR BB-432B A.pdf

1、AMSC N/A Page 1 of 12 FSC 6140 DISTRIBUTION STATEMENT A: Approved for public release; distribution is unlimited INCH-POUND MIL-PRF-81757/19(CR) 25 FEB 2011 PERFORMANCE SPECIFICATION SHEET BATTERY, RECHARGEABLE, REPAIRABLE, NICKEL CADMIUM, VENTED, 24-VOLT, 10 AMPERE-HOUR, BB-432B/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:

3、1. Part or identifying number. The part or identifying number (PIN) of the battery shall be M81757/19-1. 2. Dimensions and weight. The dimensions and weight of the battery 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 great

4、er than 34.0 pounds (15.4 kg). 3. Capacity. The minimum capacity of the battery shall be 10 ampere-hours (12.5 ampere-hours initially). When tested as specified in MIL-PRF-81757, the test parameters and requirements of Table I herein shall apply. Copyright Communications - Electronics Command Provid

5、ed by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-81757/19(CR) 2 TABLE I: Test parameters and requirements, BB-432B/A battery Test Test Method Discharge Rate(A) 1/ Cut Off Voltage(V) 1/ Capacity (Ah) Minimum 1/ Initial capacit

6、y discharge 4.5.13 10 18 12.5 Humidity and Charge Retention 4.5.14 10 18 7.5 Shock 4.5.15 250 10 4.1 Vibration 4.5.16 250 10 4.1 Temperature Shock 4.5.17 10 18 10 Altitude 4.5.18 10 18 8.5 Twenty-second pulse discharge 4.5.20 250 10 4.1 Medium Rate Discharge and Operating Position 4.5.21 100 14.4 8.

7、5 Cycle Life 4.5.23 Normal Rate (Cycle 1) 10 18 10 Medium Rate 100 14.4 6.6 Normal Rate (Cycle 100) 10 18 10 Normal Rate (Cycle 200) 10 18 10 1/ Test parameters and requirements cited herein supersede those in the general specification. 4. Electrical interface requirements. The BB-432B/A battery sha

8、ll have two connectors, located as described by Figure 1 herein: a. Connector J1: a 2-contact MS3509-XX receptacle, qualified in accordance with specification MIL-PRF-18148 b. Connector J2: a 10-contact connector that meets the interface requirements of MS3474W12-10S 5. Cells. The BB-432B/A shall in

9、clude 19 each cells, PIN M81757/1-2. Cells shall be connected inside the BB-432B/A battery using one wiring harness (see 6 below), seven M81757/3-2 conductors, six M81757/3-1 conductors, and three M81757/4-1 conductors. One M81757/3-4 conductor shall be used to connect the cells to the negative MS35

10、09 terminal and one M81757/3-10 conductor shall be used to connect to its positive terminal. 6. Cell links. The cell links used for connecting cells in series shall be copper with a cross-sectional area not less than 0.031 in2, with nickel plating that complies with SAE-AMS-QQ-N-290, Class 1, Grade

11、E. Finish shall be smooth and free of corrosion, pits, and blow-holes. 7. Wiring harness. The BB-432B/A shall include 1 wiring harness, PIN M81757/20-1. Connector J2 shall be secured to the battery container with safety wire by means of a slotted, fillister-head screw and a nut complying with NASM21

12、083-C3 (see Figure 1 for location). The screw, wire, and nut shall be made from corrosion resistant steel. Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-81757/19(CR) 3 8

13、. MIL-PRF-81757 variance. The battery shall comply with MIL-PRF-81757 except as follows. 8.1 Modify the following paragraphs: 3.6.2 Fasteners. After the phrase “free of any coating” add the following: “except as otherwise specified herein”. 3.7.4 Latches. Delete text in its entirety and replace with

14、 the following: “The cover shall be secured to the container body by latches mounted on the container body, and latch hooks mounted on the cover. The latches and hooks shall be mounted on the cover and container body (see Figures 1 and 2 herein).” 3.7.5 Handles. Not applicable to this battery. 3.7.9

15、 Connectors, intercell. This battery is designed for full maintenance; tamper-resistant fasteners shall not be used. 8.2 Add the following new paragraph: “3.7.11.9 Shipping condition. BB-432B/A batteries shall be delivered complete with electrolyte to the proper level and completely discharged, but

16、fully formed. Each battery shall be equipped with a shorting device across the output terminals of the J1 connector.” 8.3 Add the following new paragraphs: “3.8.4.3.1 Additional marking. In addition to the marking described by figure 3, the following marking shall appear on each battery: WARNING 1.

17、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 made wash immediately with water. Flush eyes with water only for 15 minutes and seek medical attention. CAUTION DO NOT USE ACID ELECTR

18、OLYTE Note: 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. Consult technical manual before servicing. Copyright Communications - Electronics Command Provided by IHS under license with CR

19、AINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-81757/19(CR) 4 Note: Use 0.09 0.030 lettering for this marking INSTRUCTION 1. Remove cover and brush off white carbonate deposits with vents in place. 2. Remove shorting plug or spring. 3. Refer to charging

20、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 the cells. Replace cell vents and cover. 5. Periodically soak cell vents in distilled water. Note: Use 0.09 0.030 letteri

21、ng for this marking” “3.8.8 Warning Tags. Where shipping devices are furnished by the contractor to assure proper shorting, disallow cell leakage etc., alkali resistant tags with strong alkali resistant nonmetallic cord shall indicate action or actions to be taken by field personnel to remove and/or

22、 replace it.” 8.4 Modify the following paragraphs: 3.10.20 Twenty-second pulse discharge. Delete “not less than 18.0 volts” from part (b) and replace with “not less than 10.0 volts.” 3.10.22 Constant voltage discharge. This requirement is not applicable to this battery. 8.5 Add the following paragra

23、ph: “3.10.31 Testing of wiring harness. When the wiring harness is subjected to either the wiring harness temperature test or to the electrolyte resistance test, the wiring harness shall exhibit the following: a. There shall be no evidence of alkali migration into harness wires and components; break

24、down of insulation; stripping of metal plating from connectors; corrosion of metal parts; nor cracking of potting compound. b. The thermistor shall meet the requirements of MIL-PRF-81757/20(CR). c. The thermoswitch shall close or open within the specified temperature ranges of MIL-PRF-81757/20(CR).

25、d. There shall be no mechanical failure of components. e. There shall be no dimensional distortion beyond specified limits of MIL-PRF-81757/20(CR).” Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without lic

26、ense from IHS-,-,-MIL-PRF-81757/19(CR) 5 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 3A sc

27、rews, two spring washers, and two flat washers” b. Add: “In addition, one wiring harness, PIN M81757/20-1, shall be provided.” 4.5.9 Handle strength test. Not applicable to this battery. 4.5.15 Shock test (basic design). Delete “Discharge the battery at the 9C-rate for 5 minutes. Measure the voltage

28、 of the battery at 5 minutes after the start of the discharge.” Replace with: “Discharge the battery at a constant current of 250 amperes in three twenty-second pulses with 120 seconds of rest between pulses.” 4.5.16 Vibration test. Delete in its entirety and replace with the following: “The followi

29、ng test shall be performed. Upon completion, batteries or cells shall meet the requirements of 3.9. “a. Remove cover from battery when necessary. “b. Constant current charge each battery at the 1C rate. “c. Secure cover to battery when necessary. “d. Attach battery to vibration equipment in the norm

30、al, upright position. “e. Connect battery to the test system. “f. Attach no less than two accelerometers to battery in the direction of the vibration motion; use the spectral density average of accelerometers to control test levels. “g. Subject battery to the vibration test of MIL-STD-810, Method 51

31、4, Procedure I (Operational service), using Annex D parameters for Category 14, Helicopters, vibration parameters for General Materiel, fxvalues for Main Rotor of CH-47D. “h. Disconnect battery from vibration equipment; attach battery to vibration equipment in a perpendicular axis. “i. repeat steps

32、e through h for a total of 3 mutually perpendicular axes. “j. Each vibration period shall be not less than one hour. “k. Discharge battery at the 0.1C rate during each vibration period; monitor battery voltage during discharge. Copyright Communications - Electronics Command Provided by IHS under lic

33、ense with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-81757/19(CR) 6 “l. Upon completion of all three vibration periods, constant current charge battery at the 1C rate. “m. Discharge the battery at a constant current of 250 amperes in three twenty-s

34、econd pulses with 120 seconds of rest between pulses. “n. Examine battery for the requirements of 3.9.” 4.5.18 Altitude test. This test is required as described with the following exceptions: a. For step b, use a test temperature of -1.1C in lieu of -40C b. For step c, use a pressure that simulates

35、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 discharge. This test is applicable to this battery. However: for step (b), stabilize at 27 3C (81F) in lieu of -17.8 1.1C (0F); for step (c), use a constant current of 250

36、 amperes in lieu of the sloping discharge rate. 4.5.21 Medium rate, operation position. This test is applicable to the battery. However, the discharge rate shall be as specified in Table 1 herein in lieu of the 9C-rate specified in MIL-PRF-81757. 4.5.22 Constant voltage discharge test. This test is

37、not applicable to this battery. 4.5.23 Cycling test. Delete text in its entirety and replace with the following: “The following test shall be performed. “a. Cycle 1. Charge at a constant current at the 1C rate to 1.55 0.10 volts per cell, then 1.1 amperes for another three hours. Rest for one hour a

38、t open circuit. Then discharge at the normal rate specified herein to cut-off voltage. “b. Cycle 2. Charge at a constant current at the 1C 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 medium rate specified herein

39、 for 2.0 minutes. “c. Cycles 3-98. Charge at a constant current at the 1.5C rate to 1.55 0.10 volts per cell and rest for one hour at open circuit and discharge at the medium rate specified herein for 2.0 minutes. “d. Cycle 99. Charge at a constant current at the 1.5C rate to 1.55 0.10 volts per cel

40、l and rest for one hour at open circuit and discharge at the medium rate specified herein to the cut-off voltage specified. “e. Cycle 100. Repeat step a. “f. Cycle 101. Repeat step b. “g. Cycle 102 -198. Repeat step c. “h. Cycle 199. Repeat step d. Copyright Communications - Electronics Command Prov

41、ided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-81757/19(CR) 7 “i. Cycle 200. Repeat step a. “NOTE: Electrolyte level shall be checked after the 100thcycle. Add water if necessary. The amount of water added shall be record

42、ed. Reconditioning is not allowed during the cycle life test.” 4.5.27 Dielectric strength and insulation resistance test. This test is applicable with the following exception: Add the following test point: f. The battery terminals to the latches. 1.2 Add the following new paragraph: “4.5.32 Wiring h

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

44、the S1 thermoswitch of the wiring harness. “c. Place the harness into an environmental chamber; set the chamber to reach the first temperature set point in the table below. Once the set temperature has been reached, allow the test sample to stabilize for not less than 1 hour. “d. Record resistance v

45、alues for the thermistor and the thermoswitch. “e. Repeat steps b and c for the second set point in the table below. “f. Repeat step d until readings have been obtained through set point 4. “g. Set the chamber to reach a temperature within a range of 56 1.1C (133F); allow the test sample to stabiliz

46、e for not less than 1 hour. “h. Set the chamber to ramp up the temperature to not greater than 62.8C (145F) at a rate not greater than 1C per five minutes while monitoring the continuity of thermoswitch S1 continuously. “i. Once the thermoswitch closes, record the temperature and stop the temperatur

47、e increase. “j. Set the chamber to reach a temperature within a range of 50.6 1.1C (123F). Allow the test sample to stabilize for not less than 1 hour. “k. Set the chamber to ramp down the temperature to not less than 46C (115F) at a rate not greater than 1C per five minutes while monitoring the con

48、tinuity of thermoswitch S1 continuously. “l. Once the thermoswitch opens, record the temperature and proceed to the next step. “m. Return chamber to room ambient conditions. Allow the test sample to stabilize for not less than 1 hour. Remove the test sample and examine for the requirements of 3.10.3

49、1. “n. Reinstall the wiring harness into the battery. “Temperature Set Points, BB-432B/A Wiring Harness (1) 10.0 1.1C (50F) Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-81757/19(CR) 8 (2) 21.0