Battery cell group conductive temperature measurement system

1 . A battery, comprising:

a housing including a base;

a battery cell stack supported on the base of the housing, the battery cell stack including a plurality of battery cells stacked relative to one another along a thickness direction thereof;

an enclosure supported on the base of the housing, the enclosure including:

first and second support walls respectively disposed on opposite first and second sides of the battery cells, each of the first and second support walls including a proximal end supported on the base of the housing and a distal end extending away from the base, above the plurality of battery cells; and

a canopy extending between the distal ends of the first and second support walls, above the battery cells; and

a measurement system including:

a heat spreader configured to thermally conduct energy through a substrate from a cell contact to a sensor contact, the cell contact being at a proximal end of the substrate proximate a measured cell of the battery cells, the sensor contact being at a distal end of the substrate; and

a temperature sensor configured to generate a temperature measurement reflective of a cell temperature of the measured cell, the temperature sensor generating the temperature measurement according to readings taken with a probe proximate the sensor contact;

wherein the substrate has an L-shaped configuration with a first section and a second section, the second section being orthogonal to the first section;

wherein the first section of the substrate extends along an inboard side of the enclosure, and the second section of the substrate corresponds with the cell contact at the proximal end of the substrate; and

wherein the substrate is comprised of a material that breaks apart to prevent reverse thermal conduction in the event of a thermal runway.

2 . The battery according to claim 1 , wherein:

the temperature sensor is disposed within the housing outboard of the enclosure.

3 . The battery according to claim 2 , wherein:

the temperature sensor includes a sensor trace thermally coupled through the enclosure with the substrate, the temperature sensor taking the readings through the sensor trace.

4 . The battery according to claim 3 , wherein:

the cell contact is attached to the measured cell with a cell adhesive and the sensor contact is pressed against to the inboard side of the enclosure.

5 . The battery according to claim 2 , wherein:

the temperature sensor includes a sensor trace touching an outboard side of the enclosure, the temperature sensor taking the readings through the sensor trace.

6 . The battery according to claim 5 , wherein:

the sensor contact is attached to the inboard side of the enclosure, the enclosure being disposed between the sensor trace and the substrate.

7 . A battery, comprising:

a housing including a base;

a plurality of battery cells stacked relative to one another within the housing along the base;

an enclosure supported on the base, the enclosure including first and second support walls cooperating with a canopy to facilitate physically and thermally isolating the battery cells from components disposed within the housing outside of the enclosure; and

a measurement system including:

a temperature sensor configured to generate a temperature measurement reflective of a cell temperature of a measured cell of the battery cells, the sensor generating the temperature measurement according to readings taken with a probe through a sensor trace, the sensor trace being outboard of the enclosure; and

a heat spreader configured to thermally conduct energy through a substrate from a cell contact to a sensor contact, the cell contact being at a proximal end of the substrate attached to the measured cell, the sensor contact being at a distal end of the substrate attached to the enclosure;

wherein the substrate has an L-shaped configuration with a first section and a second section, the second section being orthogonal to the first section;

wherein the first section of the substrate extends along an inboard side of the enclosure, and the second section of the substrate corresponds with the cell contact at the proximal end of the substrate; and

wherein the substrate is comprised of a material that breaks apart to prevent reverse thermal conduction in the event of a thermal runway.

8 . The battery according to claim 7 , wherein:

the substrate is disposed entirely within an interior of the enclosure.

9 . The battery according to claim 8 , wherein:

the sensor contact attaching with a contact adhesive to the inboard side of the enclosure, the temperature sensor attaching with a sensor adhesive to an outboard side of the enclosure, the sensor trace touching a surface area of the enclosure outside of the sensor adhesive, the enclosure being disposed between the sensor trace and the sensor contact.