Cure in place thermal interface material

Patent metadata

Field	Value
Publication number	US-10116018-B2
Application number	US-201614990189-A
Country	US
Kind code	B2
Filing date	Jan 7, 2016
Priority date	Jan 7, 2016
Publication date	Oct 30, 2018
Grant date	Oct 30, 2018

Abstract

Methods and devices for providing an even distribution of waste heat in a vehicular battery pack, including a battery pack, a cold plate, a coolant reservoir, a support structure between the battery pack and the coolant reservoir, and a conformable thermal interface material for filling the space between cells of the battery pack and the coolant reservoir so as to provide thermal contact between the cells and the coolant reservoir for distributing the waste heat. In addition, methods and devices for providing an even distribution of waste heat and structural support in any heat source to heat sink for applications such as small devices such as computer motors.

First claim

What is claimed is:

1. A method for providing an even distribution of waste heat from a battery pack comprising cells in a vehicle via a conformable thermal interface material comprising:
providing:
a coolant reservoir; and
a support structure coupled to the reservoir;

placing a release liner on the coolant reservoir;
placing, after placing the release liner on the coolant reservoir, the conformable thermal interface material in the form of a liquid or a gel within the support structure;
placing a bottom surface of the battery pack into the liquid or the gel such that the liquid or the gel flows around each of the cells of the battery pack such that there is constant thermal contact between an entire lower surface of each of the cells of the battery pack and a surface of the coolant reservoir;
cross-linking the conformable thermal interface material thereby decreasing the flowability of the conformable thermal interface material and providing for the even distribution of the waste heat via conduction of the waste heat from each of the cells to the coolant reservoir; and
removing the conformable thermal interface material by physically removing the release liner.

2. The method of claim 1 , further comprising, after the placing of the conformable thermal interface material and before the cross-linking, shaking the support structure to distribute the conformable thermal interface material.

3. The method of claim 1 , further comprising, after the placing of the conformable thermal interface material and before the cross-linking, vibrating the support structure to distribute the conformable thermal interface material.

4. The method of claim 1 , wherein the conformable thermal interface material is part of a formulation, the formulation further comprising polyvinylidene fluoride, boron nitride, melamine, a processing aid, and a ceramic.

5. The method of claim 1 , wherein the conformable thermal interface material is part of a formulation, the formulation further comprising polydimethylsiloxane, boron nitride, melamine, a processing aid, and a ceramic.

6. The method of claim 1 , wherein the decreasing of the flowability of the conformable thermal interface material is such that the cross-linked thermal interface material forms a solid and provides structural support for the battery pack.

Assignees

• Gm Global Tech Operations Llc

Inventors

• Phlegm Herman K
• Kollar Craig A
• Elhamid Mahmoud H Abd
• Fuller Timothy J
• Leutheuser Andrew H

Classifications

• H01M10/0525

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title

• H01M10/6551

  Surfaces specially adapted for heat dissipation or radiation, e.g. fins or coatings · CPC title

• H01M10/613

  Cooling or keeping cold · CPC title

• H01M10/6557 Primary

  arranged between the cells · CPC title

• H01M10/617

  for achieving uniformity or desired distribution of temperature · CPC title