Battery coil engaging members for downhole tools

Patent metadata

Field	Value
Publication number	US-2018261805-A1
Application number	US-201815918961-A
Country	US
Kind code	A1
Filing date	Mar 12, 2018
Priority date	Mar 10, 2017
Publication date	Sep 13, 2018
Grant date	—

Abstract

Arrangements for retaining coiled battery internals in a coiled orientation within a cell casing, in which end caps and/or sleeves are provided with at least one inward-facing protuberance for engaging and securing the coiled battery internals, and means for securing and aligning pouch cell batteries within a sleeve.

First claim

What is claimed is:

1 . A pouch cell battery assembly comprising:
at least one pouch cell having an outer periphery, the outer periphery provided with at least one recess; and a sleeve for receiving and retaining the at least one pouch cell, the sleeve provided with at least one sleeve protuberance on an inner surface thereof corresponding to and configured for engagement with the at least one recess.

2 . The assembly of claim 1 further comprising sleeve end caps, at least one of the sleeve end caps provided with at least one cap protuberance configured to engage with the at least one pouch cell.

3 . The assembly of claim 1 further comprising a casing for receiving and retaining the sleeve when the sleeve retains the at least one pouch cell.

4 . The assembly of claim 1 further comprising an alignment recess on the outer periphery and a corresponding alignment protuberance on the inner surface of the sleeve.

5 . A power supply comprising a battery cell adapted for supplying power to a downhole tool, the power supply comprising:
a battery cell internals securing sleeve, the battery cell internals comprising a spiral-wound group of electrodes comprising at least one alternation of negative electrode, separator, and positive electrode, the battery cell internals securing sleeve comprising:
a sleeve comprising a sleeve inner face; and
at least one sleeve protuberance on the sleeve inner face configured to engage the battery cell internals;
at least one cap disposed adjacent an open end of the sleeve and sealed by a seal thereto comprising:
an outer periphery and a cap inner face facing the battery cell internals;
a current outlet terminal; and
at least one cap protuberance protruding from the inner face, configured to engage the battery cell internals; and
an electrolyte disposed within the battery cell.

6 . The power supply of claim 5 wherein the sleeve comprises two open ends and one of the at least one cap is disposed adjacent each open end.

7 . The power supply of claim 5 wherein the seal is a hermetic seal.

8 . The power supply of claim 5 wherein the seal is achieved by one of plastic welding and e-beam welding.

9 . The power supply of claim 5 further comprising a gasket disposed between the sleeve and the outer periphery of the at least one cap.

10 . The power supply of claim 5 wherein the at least one cap and the sleeve comprise a keying feature to retain the at least one cap in fixed relation to the sleeve.

11 . The power supply of claim 10 wherein the keying feature comprises at least one tab on the sleeve and at least one corresponding notch on the outer periphery of the cap.

12 . The power supply of claim 5 wherein at least one of the at least one cap protuberance and the at least one sleeve protuberance comprises a barb, a prong, or a raised rib.

13 . The power supply of claim 12 wherein the raised rib comprises a sharp inner edge or a rounded inner edge.

14 . The power supply of claim 12 wherein at least one of the sleeve inner face, the cap inner face, the at least one cap protuberance, and the at least one sleeve protuberance is protected with an anticorrosive coating.

15 . The power supply of claim 5 further comprising at least one feed-through aperture in the cap.

16 . The power supply of claim 5 wherein at least one of the cap and the sleeve is injection molded.

17 . The power supply of claim 5 wherein at least one of the at least one cap protuberance and the at least one sleeve protuberance comprises an electrical insulator.

18 . The power supply of claim 5 wherein at least one of the at least one cap protuberance and the at least one sleeve protuberance is chemically inert.

19 . The power supply of claim 45 wherein the cap and the sleeve are composed of material having zero or low moisture absorption.

20 . The power supply of claim 19 wherein the material is polychlorotrifluoroethylene.

21 . The power supply of claim 5 wherein the length of the sleeve is shorter than that of the battery cell internals when the battery cell internals are in a relaxed position.

22 . The power supply of claim 5 wherein the inner diameter of the sleeve is smaller than the outer diameter of the battery cell internals when the battery cell internals are in a relaxed position.

23 . The power supply of claim 5 wherein the cap further comprises an electrical connection means to provide an electrical link between the cap and the battery cell internals.

24 . The power supply of claim 5 further comprising a wrapper enclosing the battery cell internals.

25 . The power supply of claim 5 wherein the cap is locked to the sleeve.

26 . The power supply of claim 25 wherein the sleeve comprises at least one tab and the cap comprises at least one corresponding recess that locks the cap and the sleeve in fixed relation.

27 . A method of manufacturing a cylindrical battery cell comprising the steps of:
providing a battery cell internals securing sleeve comprising:
a sleeve comprising a sleeve inner face; and
at least one sleeve protuberance on the sleeve inner face configured to engage battery cell internals;
providing the battery cell internals comprising a spiral-wound group of electrodes comprising at least one alternation of negative electrode, separator, and positive electrode, and inserting the battery cell internals into the sleeve; providing at least one cap comprising:
an outer periphery and a cap inner face facing the battery cell internals;
a current outlet terminal; and
at least one cap protuberance protruding from the inner face and configured to engage the battery cell internals;
sealing the at least one cap adjacent an open end of the sleeve; and filling the cell with an electrolyte.

28 . The method of claim 27 wherein the sleeve comprises two open ends and further comprising the step of sealing one of the at least one cap adjacent each open end.

29 . The method of claim 27 further comprising the step of positioning a gasket between the sleeve and the at least one cap.

30 . The method of claim 27 further comprising engaging a keying feature to retain the at least one cap in fixed relation to the sleeve.

Assignees

• Evolution Engineering Inc

Inventors

• Logan Justin Christopher
• Logan Aaron William

Classifications

• H01M10/052

  Li-accumulators · CPC title

• H01M10/39

  working at high temperature · CPC title

• E21B41/0085 Primary

  Adaptations of electric power generating means for use in boreholes · CPC title

• H01M50/477

  characterised by their shape · CPC title

• H01M50/474

  characterised by their position inside the cells · CPC title