Cooling device of an electrical storage system and method using the cooling device

Patent metadata

Field	Value
Publication number	US-12355048-B2
Application number	US-202017610828-A
Country	US
Kind code	B2
Filing date	May 12, 2020
Priority date	May 15, 2019
Publication date	Jul 8, 2025
Grant date	Jul 8, 2025

Abstract

The invention relates to a condenser ( 3 ) of a cooling device ( 2 ) of at least one battery element ( 103 ) of a motor vehicle, configured to liquefy a dielectric fluid deposited in the form of vapor at the surface of said condenser, characterized in that the condenser comprises at least one main wall ( 6 ) and a plurality of secondary walls projecting from the main wall and participating in forming a chamber for receiving one or more battery elements. The condenser comprises a cooling fluid circuit provided in the thickness of the main wall and at least one dielectric fluid circuit in liquid form provided in the thickness of at least one secondary wall, said electrical fluid circuit being equipped with at least one nozzle for projecting the dielectric fluid.

First claim

The invention claimed is:

1. A condenser of a device for cooling at least one battery element of a motor vehicle, the condenser comprising:
a main wall comprising a first thickness;
a plurality of secondary walls configured to project from the main wall, where the plurality of secondary walls at least partially delimit a chamber configured to receive the at least one battery element, and where each secondary wall of the plurality of secondary walls comprises a second thickness;
a cooling fluid circuit disposed in the first thickness of the main wall; and
at least one dielectric fluid circuit disposed in the second thickness of each secondary wall of the plurality of secondary walls, the at least one dielectric fluid circuit comprising at least one nozzle for spraying a dielectric fluid in a liquid state on the at least one battery element,
wherein the dielectric fluid is vaporized by the at least one battery element, thereby producing a vaporized dielectric fluid, and
wherein the cooling fluid circuit is configured to circulate a cooling fluid through the main wall in order to reduce a temperature of the main wall such that the main wall liquefies the vaporized dielectric fluid when deposited thereon.

2. The condenser as claimed in claim 1 , wherein the cooling fluid circuit is provided only in the first thickness of the main wall, and wherein the at least one dielectric fluid circuit extends in the first thickness of the main wall and in the second thickness of each secondary wall of the plurality of secondary walls.

3. The condenser as claimed in claim 2 , wherein the at least one dielectric fluid circuit is disposed in a peripheral area of the main wall, and wherein the cooling fluid circuit is disposed in a central area of the main wall.

4. The condenser as claimed in claim 2 , wherein a single side of the main wall comprises: a dielectric fluid inlet, a cooling fluid inlet, and a cooling fluid outlet.

5. The condenser as claimed in claim 1 , wherein the plurality of secondary walls comprise:
a first lateral secondary wall configured to project from a first longitudinal end of the main wall,
a second lateral secondary wall configured to project from a second longitudinal end of the main wall, and
an intermediate secondary wall disposed between the first lateral secondary wall and the second lateral secondary wall,
wherein the intermediate secondary wall, the main wall, the first lateral secondary wall, and the second lateral secondary wall collectively delimit two chambers that are each configured to receive a corresponding battery element.

6. The condenser as claimed in claim 5 , wherein the at least one dielectric fluid circuit comprises a plurality of branches disposed in parallel on each secondary wall of the plurality of secondary walls.

7. The condenser as claimed in claim 5 , wherein the at least one nozzle comprises a plurality of spraying nozzles that are disposed on opposing faces of the intermediate secondary wall.

8. The condenser as claimed in claim 1 , wherein the main wall and each secondary wall of the plurality of secondary walls are formed comprising two opposing shells, where at least one shell of the two opposing shells comprises a boss that delimits a cavity forming part of the cooling fluid circuit or part of the at least one dielectric fluid circuit.

9. The condenser as claimed in claim 1 , wherein the main wall and the plurality of secondary walls are formed from three shells each having a “U” shape, where a first shell of the three shells straddles both a second shell and a third shell disposed side by side with the second shell, and where the cooling fluid circuit and the at least one dielectric fluid circuit are formed by deformations on the three shells.

10. A cooling device comprising:
a first housing;
a plurality of stages of battery elements disposed in the first housing,
where each stage of the plurality of stages of battery elements comprises a corresponding condenser as claimed in claim 1 , and
where the corresponding condenser is disposed relative to the battery elements of the stage such that the spraying nozzles spray the dielectric fluid onto the battery elements, and

a container configured to receive the dielectric fluid from each stage of the plurality of stages of battery elements; and
a recirculation duct comprising a pump,
wherein the recirculation duct is configured to connect the container to at least one dielectric fluid inlet of at least one dielectric fluid circuit of the corresponding condenser of each stage of the plurality of stages of battery elements.

Assignees

• Valeo Systemes Thermiques

Inventors

• Azzouz Kamel
• Mammeri Amrid
• Garnier Sébastien

Classifications

• F28D2021/0063

  Condensers · CPC title

• F28C3/005

  one heat-exchange medium being a solid (F28C3/10 takes precedence) · CPC title

• F28B1/02

  using water or other liquid as the cooling medium · CPC title

• H01M2220/20

  Batteries in motive systems, e.g. vehicle, ship, plane · CPC title

• H01M50/209

  adapted for prismatic or rectangular cells (H01M50/216 takes precedence) · CPC title