METHOD AND APPARATUS FOR ATTACHING BATTERY TEMPERATURE SENSOR

1 . An assembly for attaching a temperature sensor to a battery cell comprising:

a sleeve having a hollow interior, the hollow interior being shaped to slide at least partially over the battery cell to a position on the battery cell; and

a housing mounted on an exterior surface of the sleeve, the housing having an opening sized to accept the temperature sensor,

wherein the sleeve and the housing provide thermal conductivity between the hollow interior of the sleeve and an interior of the opening of the housing, to facilitate thermal coupling between the battery cell and the temperature sensor.

2 . The assembly of claim 1 , further comprising a thermally conductive element filling at least a portion of the housing and providing a thermal connection between the housing and the temperature sensor.

3 . The assembly of claim 2 , wherein the thermally conductive element comprises a thermally conductive epoxy.

4 . The assembly of claim 2 , wherein the thermally conductive element further serves to physically retain the temperature sensor within the housing.

5 . The assembly of claim 1 , wherein the sleeve is rigid.

6 . The assembly of claim 1 , wherein the battery cell and the sleeve are cylindrical.

7 . The assembly of claim 1 wherein the sleeve and the housing are constructed of a metal material.

8 . The method of claim 7 wherein the sleeve and housing are constructed of the same metal material as an outer surface of the battery cell.

9 . The assembly of claim 1 , wherein the sleeve is placed at a position on the battery cell removed from end portions of the battery cell.

10 . The assembly of claim 1 , wherein the assembly is one of a plurality of assemblies, and the battery cell is part of a two dimensional array of battery cells, wherein the plurality of assemblies are fitted to a subset of battery cells in the two dimensional array of battery cells.

11 . The assembly of claim 1 wherein the temperature sensor is a thermistor.

12 . A method for attaching a temperature sensor to a battery cell comprising:

providing a sleeve having a hollow interior;

providing a housing mounted on an exterior surface of the sleeve, the housing having an opening on one side sized to accept the temperature sensor;

inserting the temperature sensor into in the housing;

securing the temperature sensor in the housing; and

sliding the housing at least partially over the battery cell with a contact to at least one point on the battery cell.

13 . The method of claim 12 further comprising inserting a thermally conductive element to fill at least a portion of the housing and provide a thermal connection between the housing and the temperature sensor.

14 . The method of claim 12 , further comprising placing the sleeve at a position on the battery cell removed from end portions of the battery cell.

15 . The method of claim 12 , wherein the battery cell and the sleeve are cylindrical.

16 . The method of claim 13 , wherein the thermally conductive element is an epoxy.

17 . The assembly of claim 12 wherein the sleeve and the housing are constructed of a metal material.

18 . The method of claim 17 wherein the sleeve and housing are constructed of the same metal material as an outer surface of the battery cell.

19 . The method of claim 12 , further comprising securing the temperature sensor in the housing with a thermally conductive element.

20 . An apparatus for attaching a temperature sensor to a battery cell comprising:

means for sensing temperature;

means for securing the means for sensing temperature in a housing;

means for providing thermal conductivity between the housing and the means for sensing temperature; and

means for attaching the housing to a battery cell by sliding the means for attaching along the battery cell.