1、 MIL-B-18/7E 1 March 2011 SUPERSEDING MIL-B-18/7D 21 May 1985 MILITARY SPECIFICATION SHEET BATTERY, DRY, BA-27 This specification is approved for use by all Departments and Agencies of the Department of Defense. The requirements for acquiring the product described herein shall consist of this specif
2、ication sheet and MIL-B-18. FIGURE 1. Interface and physical dimensions. AMSC N/A FSC 6135 INACTIVE FOR NEW DESIGN AFTER 6 JULY 1998 INCH-POUND Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-B-18/7E 2 Ltr Inches mm Min Max Min Max A .437 .563 11
3、10 14.30 B 1.437 1.563 36.50 39.70 C 2.437 2.563 61.90 65.10 D 3.437 3.563 87.30 90.50 E 3.937 4.063 100.00 103.20 F .656 .782 16.66 19.86 G 1.375 1.500 34.93 38.10 H 3.000 3.126 76.20 79.34 J - 3.563 - 90.50 NOTES: 1. All dimensions shown on figure 1 are in inches. 2. Metric equivalents specified
4、in the table are for general information only. 3. Voltage and polarity markings may be placed either on the top or front face of the battery. 4. Unless otherwise specified, tolerance is .062 inch. 5. Provide insulated knurled nuts with brass inserts. FIGURE 1. Interface and physical dimensions - Con
5、tinued. REQUIREMENTS: Interface and physical dimensions: See figure 1. Nominal voltage: -4.5 volts. Tapped at: -3 volts. Tapped at: -1.5 volts. Usual number and type of cells: 3 “D“ cells. Usual cell connection: Series. Terminals: Stud and nut. Weight (maximum): 1 pound. Capacity tests: When the bat
6、tery is tested in accordance with the methods of examination and test of this specification, the minimum capacity-test requirements shall be not less than the minimum time specified for SLD or SLT. First article inspection: Visual and mechanical (external). Battery voltage. Provided by IHSNot for Re
7、saleNo reproduction or networking permitted without license from IHS-,-,-MIL-B-18/7E 3 Vibration test. Mechanical-shock test in accordance with MIL-STD-202, method 213, test condition I. Insulation resistance test in accordance with MIL-STD-202, method 302, test condition letter B, tolerance 20 volt
8、s. Capacity, D (without storage). Jacket integrity test. Conformance inspection. Visual and mechanical (external) Battery voltage. Insulation-resistance test in accordance with MIL-STD-202, method 302, test condition letter B, tolerance 20 volts. Vibration test. Mechanical-shock test in accordance w
9、ith MIL-STD-202, method 213, test condition I. Jacket integrity test. Electrode leakage. Capacity, D and T. Methods of examination and test: Capacity tests: See requirements for capacity specified herein. Storage: Test Period D 12 months T 90 days Open-circuit voltage: After completion of storage fo
10、r D test specified, the open-circuit voltage shall be not less than 4.45 volts when measured at ambient storage conditions. Discharge: The battery shall be discharged through 20 ohms for 4 minutes per hour, 10 hours per day, 5 days per week. This cycle shall be repeated continuously to a test-end vo
11、ltage of 2.8 volts. Closed circuit voltage: Use TS-183( )/U test per special marking or, with minimum permissible voltage as specified for TS-183 ( )/U, use a load resistant value of 19.95 ohms. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-B-1
12、8/7E 4 Special marking on each unit package: Part or Identifying Number (PIN): BA-27, see 1.2 of MIL-B-18. Referenced documents. In addition to MIL-B-18, this document references MIL-STD-202. The margins of this specification are marked with vertical lines to indicate where changes from the previous
13、 issue were made. This was done as a convenience only and the Government assumes no liability whatsoever for any inaccuracies in these notations. Bidders and contractors are cautioned to evaluate the requirements of this document based on the entire content irrespective of the marginal notations and
14、 relationship to the last previous issue. Custodians: Preparing activity: Army - CR DLA - CC Navy - SH Air Force - 99 (Project 6135-2010-006) DLA - CC Review activities: Navy - MC NOTE: The activities listed above were interested in this document as of the date of this document. Since organizations
15、and responsibilities can change, you should verify the currency of the information above using the ASSIST Online database at https:/assist.daps.dla.mil/. TO TEST THIS BATTERY WITH TS-183 ( )/U: USE JACK NO MINIMUM PERMISSIBLE VOLTAGE 7 4.00 Unless expressly authorized, this test information shall apply to Army and Air Force applications only. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
