1、MI L-B-81757/12A( AS) 24 April 1987 . SUPERSEDING MIL-B-81757/12(AS) 20 April 1984 MILITARY SPECIFICATION SHEET BATTERY, STORAGE, AIRCRAFT, NICKEL-CADMIUM FORCED-AIR COOLED, CHARGE CONTROLLED, 24-VOLT, 30 AMPERE-HOUR This specification is approved for use by the Naval Air Systems Command, Department
2、 of the Navy, and is available for use by all Departments and Agencies of the Department of Defense. The complete requirements for acquiring the battery assembly described herein shall consist of this document and the latest issue of MIL-B-81757. b .875 2.031 I 0750T. 06244 - 11.812 MAX. 1 JI CONNEC
3、TOR J2 CONNECTOR TMS 3509 3.51 I f.063 - 1.415 (TYP) * CAUTION LABEL REQUIRED IN SAME LOCATION, OPPOSITE SIDE. OF CONTAINER. FIGURE 1. Battery assembly. P/N M81757/12-1 and P/N M81757/12-2 AMSC N/A FSC 6140 Approved for public release; distribution is unlimited. DISTRIBUTION STATEMENT A: Page 1 of 7
4、 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-B OPTIONAL LOCATION FOR CAUTION MARKING I 4 STRIKES LOCATED AS SHOWN HOLD-DOWN HOOKS ARE TO BE UNPAINTED (TYP) L- i0.750i.062 -4 FIGURE 2. Cover. MATERIAL: ELASTOMER (HOLD-DOWN PAD) FIGURE 3. Cover hol
5、d-down pad. 2 PAD PROJECTION-WHEN COVER IS SECURED VENTED FILLER CAP AND SHALL NOT HINDER THE PROPER RELEASE OF GASES. PROJECTION w I LL RE IN CONTACT WITH EACH c i.03!5 MIN. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MI L-B-81757/12A( AS) I I I
6、 M817!57/1-10 N0.10-32 HEX SHEAR HEAD BOLT (38 REOUIREDJ M81757 1-78 WASHER (38 REQUIRED) M817!d-8B BELLEVILLE SPRING (38 REOUIRED) 7 Q /- BATTERY SENSOR /- CONNCTOR ASSEMBLY M81757/1-10 NO. 10-32 HEX SHEAR HEAD BOLT (2 REQUIRED) M81757/1-78 WASHER (2 REOUIRED 1 M81757/1-8B BELLEVILLE SPRING (2 REOU
7、IRED) FIGURE 4. Ce1 1 arrangement and battery sensor/connector assembly. 3 f o Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-_ MIL-B-81757/12A bli W 777790b 0094753 4 MIL-B-81757/1 ZA(AS) NOTES: All M81757/12 batteries shall have the same ce1 1 arr
8、angement. 1. Battery M81757/12-2 shall include a battery sensor/connector assembly capable of withstanding all environmental conditions to which the battery is subjected without damage or degradation of performance. The battery sensor plate shall be in thermal contact with the front surface of cell
9、16 (counting from negative terminal). No air flow shall be allowed to flow between the surfaces of cell 16 and the battery sensor plate. The battery sensor/connector assembly shall consist of: a. b. C. d. e. f. g* One temperature sensor plate with component mounting cavity , installed into the batte
10、ry as shown. One auxiliary receptacle , having ten contacts, type D38999/44WC98SN, conforming to MIL-C-38999, shall be mounted to the battery container as shown. One thermal switch , in accordance with M24236/1-1565, having normally open contacts, which close at 71“ + 2.8“C and reopen at 62.8 + 2.8“
11、C. The thermal switch shall be certified to withstand a minirnm of 50,000 operating cycles at 30 VDC and 2.0 amperes without the switchs opening and closing temperature values changing more than + 2.8“C. The thermal switch shall be potted with the switch leadsconnected to pins A and B of the battery
12、 auxiliary connector. One 1/4-watt wire-wound resistor , in accordance with MIL-R- 39005, valued at 3,000 ohms - + 1 percent at 25“C, and shall have temperature coefficients of: T.C. = 3,900 + 30 PPM/OC below 25C T.C. = 4,100 - 30 PPM/“C above 25C The resistor shall be potted with the resistor leads
13、 connected to pins C and D of the battery auxiliary receptacle. One center tap voltage lead , having a nickel-plated terminal lug, shall be connected to the positive terminal of cell 10 (counting from battery negative). The center tap voltage lead shall include a 2,000 ohm, 1/8-watt resistor, in acc
14、ordance with MIL-R- 39017, and be connected to pin E of the battery auxiliary connector. All electrical connections made to the batter auxiliary connector and battery sensor assembly shall be potted 6 7 with a compound that will not support flame, absorb moisture, or be damaged by battery electrolyt
15、e. All wire used for electrical connections shall be #20 AWG, in accordance with MIL-W-16878, teflon insulated, and capable of with- standing the temperature and exposure to battery electrolyte without damage. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from
16、IHS-,-,-MIL-B-L757/L2A bL W 9777706 0074754 b REQUIREMENTS: 1. The receptacle will be so located that the top of the terminal block and the cell terminal contact surfaces are in the same plane. Receptacle terminal block shall be screw size 10-32. Receptacle shall conform to MS3509. 2. 5 3. i 4. 5. 6
17、. 7. 8. 9. 1 o. 11. 12. 13. 14. 15. 16. All dimensions are prior to epoxy coating except: Overall length - 11.812 maximum, overall width - 11.250 maximum, and overall height - 1 O. 31 2 maximum. Method of mounting latches and strikes shall be optional. conform to Corbin Cabinet Lock Division, Americ
18、an Hardware, Item Number 15834, or Nielson -Latch number C-833314-2-SS-302 or equivalent. They shall Spacers, if used, shall be polyethylene sheet in accordance with ASTM STD D4066-82, Composition A, Type I and Type III, minimum 0.015 inch thick, color neutral. Latches and strikes shall not be epoxy
19、-coated. The battery voltage shall be 24 volts (nominal). The battery weight shall be 88 pounds maximum when filled. The battery shall contain 19 cells. The rated capacity at 1C rate shall be 30 Ah/l Hr/8O0F/18.OV. Length and width of cover pad and spacer sha-ll conform to the inside dimensions of t
20、he applicable cover. The length, width and thickness of cover pad projections shall provide sufficient pressure on the vented filler caps to hold down the battery cells during vibration. The quantity and location of cover projection pads shall be determined by the vented filler caps. All cells withi
21、n a battery shall be from the same production lot. Cell and receptacle removal shall be prevented by non-removable fasteners, M81757/1-10 hex, shear-head bolt. The cell vented filler cap shall be in accordance with MIL-6-81757/2 Battery part number M81757/12-1 shall conform to MI L-6-81757 except as
22、 modified by the following: 3.5.7 Cells. Delete. 3.5.7.1 Mountings . Delete. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-flIL-B-fl1757/12A 61 = 7777906 0074755 MI L-B-81757/12A(AS) 3.6.5.2.1 Cell terminal marking. Delete last three sentences. 3.6
23、.5.2.2 Cell identification. Delete. 3.6.5.2.3 Battery identification. Each battery shall have its Marking shall be in The marking shall show the identification marking silk screened with an epoxy overlay, or equal, that is impervious to 1.3 + 0,025 specific gravity KOH electrolyte, in accordance wit
24、h applicablespecification sheet. white print in accordance with MIL-M-13231. following: Information Required Exampl e Battery, Storage Military Battery Part No. Replaces (include replacement data from applicable battery specification sheet) National Stock Number Vol tage (Nomi na1 ) Maximum Weight M
25、i 1 i tary “C“ Rated Capacity Contract Number Date Code (see 3.6.5.2.5) Manufacturer s Part Number Manufacturers Serial Number Warranty Expiration Date Battery, Storage Rep1 aces D8565/2-1 M81757/12-1 NSN 61 40-01 -*-* 24 Volts Maximum Weight 88 Lbs (30 AH/1 Hr/8O0F/18V) Date Code * * * * 041 787 3.
26、6.5.2.4 Battery caution and receptacle markings. These markings, They shall be impervious to 1.3 They shall be located as shown in accordance wjth applicable specification sheet, shall be in white printing in accordance with MIL-M-13231. - + 0.025 specific gravity KOH electrolyte. on the applicable specification sheet and read as follows: I +RECEPTACLE Preparing Activity: Navy - AS (Project No. 6140-N644) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
