Dehumidification chamber for battery systems and related methods

Patent metadata

Field	Value
Publication number	US-9758054-B2
Application number	US-201414284206-A
Country	US
Kind code	B2
Filing date	May 21, 2014
Priority date	May 21, 2014
Publication date	Sep 12, 2017
Grant date	Sep 12, 2017

Abstract

The present disclosure relates to reducing formation of condensate in a battery compartment using a dehumidification chamber in which air is conditioned prior to entering the battery compartment. In one embodiment, a cooling system may be configured to produce a flow of coolant. The dehumidification chamber configured to receive a flow of ambient air from an environment. A heat transfer device may be in thermal communication with the dehumidification chamber and configured to receive the flow of coolant. The heat transfer device may produce a flow of conditioned air from a thermal interaction between the flow of coolant and the flow of ambient air. The battery compartment may house a battery and may receive the flow of conditioned air and the flow of coolant. In some embodiments, the flow of coolant may pass through the heat transfer device before the flow of coolant passes through the battery compartment.

First claim

What is claimed is:

1. A system to reduce formation of condensate in a battery compartment, the system comprising:
a cooling system configured to produce a flow of coolant;
a dehumidification chamber, comprising:
a vent configured to:
permit a flow of ambient air from an environment to enter the dehumidification chamber; and
permit condensate formed in the dehumidification chamber to drain from the dehumidification chamber; and

a heat exchanger configured to receive the flow of coolant from the cooling system and configured to produce a flow of conditioned air from a thermal interaction between the flow of coolant and the flow of ambient air; and

a battery compartment configured to house a battery and further configured to receive the flow of conditioned air and the flow of coolant, the flow of coolant further configured to cool the battery;
wherein the flow of coolant comprises a closed-loop path through the dehumidification chamber and the battery compartment.

2. The system of claim 1 , wherein the flow of coolant passes through the heat exchanger before the flow of coolant passes to the battery compartment.

3. The system of claim 1 , wherein the vent is configured to allow the condensate to drain under the influence of gravity.

4. The system of claim 1 , wherein the flow of ambient air is generated by a pressure difference between the environment and the dehumidification chamber.

5. The system of claim 1 , further comprising an air-permeable membrane disposed between the dehumidification chamber and the battery compartment, the air permeable membrane configured to permit the flow of conditioned air to pass between the dehumidification chamber and the battery compartment.

6. The system of claim 4 , wherein the air-permeable membrane is impermeable to liquid.

7. The system of claim 1 , further comprising a drying agent disposed in the dehumidification chamber, the drying agent configured to absorb water from the flow of ambient air.

8. The system of claim 1 , wherein the cooling system is further configured to maintain a first temperature in the dehumidification chamber below a second temperature in the battery compartment.

9. The system of claim 7 , wherein the cooling system is further configured to maintain a third temperature of the battery between about 5° C. and about 35° C.

10. The system of claim 1 , wherein the battery comprises a lithium-ion battery.

11. A system to reduce formation of condensate in a battery compartment, comprising:
a cooling system configured to produce a flow of coolant in a closed-loop;
a dehumidification chamber configured to receive a flow of ambient air from an environment;
a heat transfer device in thermal communication with the dehumidification chamber and configured to receive the flow of coolant, the heat transfer device further configured to produce a flow of conditioned air from a thermal interaction between the flow of coolant and the flow of ambient air;
a battery compartment configured to house a battery and configured to receive the flow of conditioned air and the flow of coolant, the flow of coolant configured to cool the battery; and
wherein the flow of coolant in the closed-loop passes through the heat transfer device before the flow of coolant passes through the battery compartment.

Assignees

• Gm Global Tech Operations Llc

Inventors

• Schilder Boris

Classifications

• H01M10/625

  Vehicles · CPC title

• H01M10/613 Primary

  Cooling or keeping cold · CPC title

• H01M10/6561

  Gases · CPC title

• B60L11/1874 Primary

  Operations & Transport · mapped topic

• B60L58/26 Primary

  by cooling · CPC title