Nuclear battery shock-support system

• US 4,026,726 A
• Filed: 12/01/1975
• Issued: 05/31/1977
• Est. Priority Date: 12/01/1975
• Status: Expired due to Term

• Current Assignee: General Atomics, Inc.
• Original Assignee: General Atomics, Inc.
• Inventors: Carney, Homer Charles
• Primary Examiner(s): Moskowitz, Nelson
• Application Number:
  US05/636,812
• Time in Patent Office: 547 Days
• Field of Search: 136/202, 136/203, 136/221, 136/230, 62/3, 29/573, 128/419 P
• US Class Current: 136/202
• CPC Class Codes: G21H 1/103 Cells provided with thermo-electric generators

Abstract

In a nuclear battery utilizing the Seebeck Effect to produce an electric voltage, a shock support system is disclosed wherein thermally conductive spring means and alignment caps support a thermoelectric converter between a heat sink and an independently supported heat source so as to cushion the converter from vibration and shock.

Claims

1. In a nuclear thermoelectric battery having a radioisotope heat source, a heat sink displaced from said heat source, and a thermoelectric converter between said heat source and said heat sink and in a thermoconductive relationship therewith, a shock support system for said thermoelectric converter, said shock support system comprising:

a first alignment cap between said converter and said heat sink,

a second alignment cap between said converter and said heat source, said first and second caps being thermally conductive,

said alignment caps having relieved surfaces operative to slide or rock upon battery shock or vibration, and

spring means disposed between said second alignment cap and said heat source, said caps and said spring means serving to provide a thermoconductive relationship between said converter and said heat source and said heat sink, while also serving to protect said converter from shock, vibration and other external forces.

2. A shock support system in accordance with claim 1 in which said battery includes a housing and said heat source is carried by said housing.

3. A shock support system in accordance with claim 2 in which said heat source is carried by a support tube which is fixed to said housing.

4. A shock support system in accordance with claim 1 in which said converter is reinforced by a film which is bonded to the exposed surfaces of said converter.

5. A shock support system in accordance with claim 3 in which said support tube is constructed of polyimide polymer.

6. A shock support system in accordance with claim 4 in which said film is an aluminum-metallized polymer laminate.

7. A shock support system in accordance with claim 1 in which said first alignment cap includes a side surface portion having a radius of curvature of approximately 0.01 inches.

8. A shock support system in accordance with claim 1 in which said second alignment cap includes a side surface portion having a radius of curvature of approximately 0.01 inches and a tapered bottom surface portion extending from said side surface portion to a central, flat-bottom surface portion.

9. A shock support system in accordance with claim 1 in which said spring means is a saucer-shaped metal spring.

10. A nuclear, thermoelectric battery comprising a housing, a radioisotopic heat source, a heat sink spaced from said heat source, and a thermoelectric converter between said heat source and said heat sink and in thermoconductive relationship therewith, all within said housing,

said heat source carried by a generally hollow support tube, said support tube being fixed within said housing,

said thermoelectric converter upstanding within said support tube and spaced from said heat source by a first alignment cap and a spring disposed between said heat source and said first alignment cap, said first alignment cap having a curved side surface portion slidably contactable with said support tube,

said thermoelectric converter being spaced from said heat sink by a second alignment cap, said second alignment cap having a curved side surface portion slidably contactable with said support tube and also having a tapered lower surface portion, allowing the second alignment cap to rock or shift upon said heat sink during shock or vibration,

said alignment caps and said spring serving to provide a thermoconductive relationship between said converter and said heat source and said heat sink, while also serving to protect said converter from shock, vibration and other external forces.

11. A nuclear thermoelectric battery in accordance with claim 10 in which said curved side surface portion of said first alignment cap has a radius of curvature of approximately 0.01 inches and the curved said surface portion of said second alignment cap has a radius of curvature of approximately 0.01 inches.

12. A nuclear thermoelectric battery in accordance with claim 10 in which said thermoelectric converter is reinforced by a film which is bonded to the exposed surfaces of said converter.