System and method for battery insulation

Patent metadata

Field	Value
Publication number	US-9012060-B2
Application number	US-201213726846-A
Country	US
Kind code	B2
Filing date	Dec 26, 2012
Priority date	Dec 26, 2012
Publication date	Apr 21, 2015
Grant date	Apr 21, 2015

Abstract

In accordance with an embodiment of the invention, an assembly of tubular cell insulator casings is provided. The assembly includes a plurality of tubular cell insulator casings, wherein each cell insulator casing is open at a top end and configured to surround at least one of a plurality of electrically interconnected electrochemical cells, wherein said plurality of tubular cell insulator casings comprises a monolithic unit. The battery pack also includes a plurality of insulator plugs and a sump plate configured to support said plurality of insulator plugs.

First claim

The invention claimed is:

1. An assembly of tubular cell insulator casings comprising:
a monolithic assembly comprising: a plurality of tubular cell insulator casings, wherein each tubular cell insulator casing is open at a top end and open at a bottom end and configured to surround at least one of a plurality of electrically interconnected electrochemical cells and wherein each tubular cell insulator casing is in physical contact with an adjoining tubular cell insulator casing, wherein each tubular cell insulator casing is made of a high temperature dielectric material, comprising at least one of: recycled alumina powder, ceramic composites, fiber-filled composites and high temperature silicone thermosets, wherein said dielectric material comprises material with voltage withstand value of at least 100V DC continuous;
a plurality of insulator plugs, wherein at least one of said plurality of insulator plugs:
corresponds to said at least one of said plurality of tubular cell insulator casings;
is positioned below said at least one of said plurality of tubular cell insulator casings;
is configured to support and to insulate said electrochemical cell corresponding to said at least one of said plurality of tubular cell insulator casings; and

a sump plate configured to support said plurality of insulator plugs, wherein the sump plate extends below and extends across the whole assembly of tubular cell insulator casings.

2. The assembly of claim 1 , wherein said monolithic unit comprises a honeycomb structure.

3. The assembly of claim 1 , wherein said high temperature comprises a temperature between about 300° C. and about 350° C.

4. The assembly of claim 1 , wherein said plurality of tubular cell insulator casings are configured to withstand a temperature of at least about 200° C.

5. The assembly of claim 1 , further comprising a connecting element at said top end configured to connect said electrochemical cells.

6. The assembly of claim 1 , wherein said plurality of cell insulator casings further comprise a plurality of extensions, each extending from a corner of one of said plurality of cell insulator casings, wherein said extension is configured to abut an adjacent extension.

7. The assembly of claim 1 , wherein each of said plurality of insulator plugs comprises a ceramic material.

8. The assembly of claim 1 , wherein said plurality of tubular cell insulator casings and said sump plate are separated by a predetermined clearance distance.

9. The assembly of claim 1 , wherein an inner surface of said plurality of tubular cell insulator casings touches an exterior surface of said plurality of electrically interconnected electrochemical cells.

10. The assembly of claim 1 , wherein a distance is defined between an inner surface of said plurality of tubular cell insulator casings and an exterior surface of said plurality of electrically interconnected electrochemical cells.

11. The assembly of claim 1 , wherein a portion of said plurality of tubular cell insulator casings extends over a portion of said plurality of electrically interconnected electrochemical cells.

12. The assembly of claim 1 , wherein a cross-sectional shape of said plurality of tubular cell insulator casings matches a cross-sectional shape of said plurality of electrically interconnected electrochemical cells.

13. The assembly of claim 1 , wherein each tubular cell insulator casing is made of mica.

14. A battery pack comprising:
a monolithic assembly comprising: a plurality of tubular cell insulator casings, wherein each tubular cell insulator casing is open at a top end and open at a bottom end and configured to surround at least one of said plurality of electrically interconnected electrochemical cells and wherein each tubular cell insulator casing is in physical contact with an adjoining tubular cell insulator casing, wherein each tubular cell insulator casing is made of a high temperature dielectric material, comprising at least one of: recycled alumina powder, ceramic composites, fiber-filled composites and high temperature silicone thermosets, wherein said dielectric material comprises material with voltage withstand value of at least 100V DC continuous;
a plurality of insulator plugs, wherein at least one of said plurality of insulator plugs:
corresponds to said at least one of said plurality of tubular cell insulator casings;
is positioned below said at least one of said plurality of tubular cell insulator casings;
is configured to support and to insulate said electrochemical cell corresponding to said at least one of said plurality of tubular cell insulator casings; and

a sump plate configured to support said plurality of insulator plugs, wherein the sump plate extends below and extends across the whole assembly of tubular cell insulator casings.

15. The battery pack of claim 14 , wherein said plurality of cell insulator casings further comprise a plurality of extensions, each extending from a corner of one of said plurality of cell insulator casings, wherein said extension is configured to abut an adjacent extension.

16. The battery pack of claim 14 , wherein a bottom end of at least one of said plurality of tubular cell insulator casings is tapered to interlock corresponding electrochemical cell.

17. The battery pack of claim 14 , wherein a bottom end of at least one of said plurality of tubular cell insulator casings is at least partially closed.

Assignees

• Gen Electric

Inventors

• Krahn John Raymond
• Frutschy Kristopher John
• Subramanian Narayan
• Waters William Patrick
• Tan Daniel Qi
• Schank William Hubert

Classifications

• H01M50/107 Primary

  having curved cross-section, e.g. round or elliptic (H01M50/103, H01M50/109, H01M50/11 take precedence) · CPC title

• H01M2/0242

  Electricity · mapped topic

• H01M2/022

  Electricity · mapped topic

• H01M2/028

  Electricity · mapped topic

• H01M2/0282

  Electricity · mapped topic