Extended thermal battery for cooling portable devices

Patent metadata

Field	Value
Publication number	US-11599168-B2
Application number	US-202117443560-A
Country	US
Kind code	B2
Filing date	Jul 27, 2021
Priority date	Jul 27, 2021
Publication date	Mar 7, 2023
Grant date	Mar 7, 2023

Abstract

A cooling system for cooling components in an information handling system contained in a portable chassis comprises a die plate for receiving heat from a component, a heat pipe for transferring heat from the die plate to a single heat exchanger, a fan for generating an airflow across the heat exchanger and a thermal battery. The heat pipe comprises at least one curvature and the thermal battery is coupled to the die plate and has a length and a width such that the thermal battery is in contact with the heat pipe from the die plate to a point past the at least one curvature. The thermal battery may be formed from a thermally conductive material, be a vapor chamber or otherwise facilitate heat transfer to a heat pipe from the die plate to a point past the curvature for improved cooling.

First claim

What is claimed is:

1. A cooling system for a component in an information handling system contained in a portable chassis, the cooling system comprising:
a die plate in thermal contact with the component for receiving heat from the component;
a heat exchanger positioned near a vent in the portable chassis;
at least one heat pipe in thermal contact with the die plate and the at least one heat exchanger for transferring heat from the die plate to the at least one heat exchanger, the at least one heat pipe having a curvature between the die plate and the heat exchanger;
a fan for generating airflow across the heat exchanger to transfer heat from the heat exchanger to an ambient environment; and
at least one thermal battery coupled to the die plate, the at least one thermal battery having a length and width such that the at least one thermal battery is in contact with the at least one heat pipe from the die plate to a point past the curvature in the at least one heat pipe.

2. The cooling system of claim 1 , wherein:
the at least one heat pipe comprises a first heat pipe in thermal contact with the die plate and a first heat exchanger and a second heat pipe in thermal contact with the die plate and a second heat exchanger; and
the at least one thermal battery comprises:
a first thermal battery coupled to the die plate, the first thermal battery having a length and a width such that the first thermal battery is in contact with the first heat pipe from the die plate to a point past a curvature in the first heat pipe; and
a second thermal battery coupled to the die plate, the second thermal battery having a length and a width such that the second thermal battery is in contact with the second heat pipe from the die plate to a point past a curvature in the second heat pipe.

3. The cooling system of claim 1 , wherein:
the die plate is in thermal contact with a first component; and
the at least one thermal battery is in thermal contact with a second component.

4. The cooling system of claim 3 , wherein:
an end of the at least one heat pipe comprises a second curvature; and
the at least one thermal battery has a length and a width such that the at least one thermal battery is in contact with the at least one heat pipe from the die plate to a point past the second curvature.

5. The cooling system of claim 1 , wherein the thermal battery comprises a heat chamber comprising a two-phase fluid and a wicking material.

6. The cooling system of claim 1 , wherein the thermal battery comprises a two-phase material.

7. The cooling system of claim 6 , wherein the two-phase material comprises a wax.

8. The cooling system of claim 1 , wherein:
the at least one heat pipe comprises:
a first heat pipe in contact with the die plate for receiving heat from the die plate and in contact with a first heat exchanger for transferring heat to the first heat exchanger, the first heat pipe having at least one curvature between the die plate and the first heat exchanger; and
a second heat pipe in contact with the die plate for receiving heat from the die plate and in contact with a second heat exchanger for transferring heat to the second heat exchanger, the second heat pipe having at least one curvature between the die plate and the second heat exchanger; and

a second thermal battery is coupled to the die plate, the second thermal battery having a length and a width such that the second thermal battery is in contact with the second heat pipe from the die plate to a point past the at least one curvature of the second heat pipe.

9. A portable chassis for an information handling system, the portable chassis comprising:
a plurality of components of the information handling system;
a battery for providing power to the plurality of components; and
a cooling system comprising:
a heat exchanger positioned near a vent in the portable chassis;

at least one heat pipe in thermal contact with a die plate and the at least one heat exchanger for transferring heat from the die plate to the heat exchanger, the at least one heat pipe having a curvature between the die plate and the heat exchanger;
a fan for generating airflow across the heat exchanger to transfer heat from the heat exchanger to an ambient environment; and
at least one thermal battery coupled to the die plate, the at least one thermal battery having a length and width such that the at least one thermal battery is in contact with the at least one heat pipe from the die plate to a point past the curvature in the at least one heat pipe.

10. The portable chassis of claim 9 , wherein:
the at least one heat pipe comprises a first heat pipe in thermal contact with the die plate and a first heat exchanger and a second heat pipe in thermal contact with the die plate and a second heat exchanger;
the at least one thermal battery comprises:
a first thermal battery coupled to the die plate, the first thermal battery having a length and a width such that the first thermal battery is in contact with the first heat pipe from the die plate to a point past a curvature in the first heat pipe; and
a second thermal battery coupled to the die plate, the second thermal battery having a length and a width such that the second thermal battery is in contact with the second heat pipe from the die plate to a point past a curvature in the second heat pipe.

11. The portable chassis of claim 9 , wherein:
the die plate is in thermal contact with a first component; and
the at least one thermal battery is in thermal contact with a second component.

12. The portable chassis of claim 11 , wherein:
an end of the at least one heat pipe comprises a second curvature; and
the at least one thermal battery has a length and a width such that the at least one thermal battery is in contact with the at least one heat pipe from the die plate to a point past the second curvature.

13. The portable chassis of claim 9 , wherein the thermal battery comprises a heat chamber comprising a two-phase fluid and a wicking material.

14. The portable chassis of claim 9 , wherein the thermal battery comprises a two-phase material.

15. The portable chassis of claim 14 , wherein the two-phase material comprises a wax.

16. The portable chassis of claim 9 , wherein:
the at least one heat pipe comprises:
a first heat pipe in contact with the die plate for receiving heat from the die plate and in contact with a first heat exchanger for transferring heat to the first heat exchanger, the first heat pipe having a curvature between the die plate and the first heat exchanger; and
a second heat pipe in contact with the die plate for receiving heat from the die plate and in contact with a second heat exchanger for transferring heat to the second heat exchanger, the second heat pipe having a curvature between the die plate and the second heat exchanger; and
the at least one thermal battery comprises:
a first thermal battery coupled to the die plate, the first thermal battery having a length and a width such that the first thermal battery is in contact with the first heat pipe from the die plate to a point past the curvature of the first heat pipe; and
a second thermal battery coupled to the die plate, the second thermal battery having a length and a width such that the second thermal battery is in contact with the second heat pipe from the die plate to a point past the curvature of the second heat pipe.

17. An information handling system, comprising:
a plurality of components;
a battery for providing power to the plurality of components; and
a cooling system comprising:
a heat

Assignees

• Dell Products Lp

Inventors

• Mckittrick Allen B
• Shih Pomin
• North Travis

Classifications

• H01M10/6563

  with forced flow, e.g. by blowers · CPC title

• H01M10/6554

  Rods or plates · CPC title

• H01M10/6552

  Closed pipes transferring heat by thermal conductivity or phase transition, e.g. heat pipes · CPC title

• H01M2220/30

  Batteries in portable systems, e.g. mobile phone, laptop · CPC title

• G06F2200/201

  Cooling arrangements using cooling fluid · CPC title