Light weight thermal runaway and explosion resistant aerospace battery

Patent metadata

Field	Value
Publication number	US-11799162-B2
Application number	US-202117405894-A
Country	US
Kind code	B2
Filing date	Aug 18, 2021
Priority date	Aug 18, 2021
Publication date	Oct 24, 2023
Grant date	Oct 24, 2023

Abstract

An aerospace battery may include a housing, a retaining seat disposed in the housing, and a battery pack core supported by the retaining seat in the housing. The battery pack core may include at least one cell district comprising a plurality of pouch cell batteries and at least one flexible cold plate disposed between at least two adjacent pouch cell batteries of the plurality of pouch cell batteries. The retaining seat may define a fluid delivery channel configured to couple to an inlet of a cooling channel of the flexible cold plate and a fluid return channel configured to couple to an outlet of the cooling channel of the flexible cold plate.

First claim

What is claimed is:

1. An aerospace battery comprising:
a housing;
a retaining seat disposed in the housing;
a battery pack core supported by the retaining seat, wherein the battery pack core comprises at least one district comprising:
a plurality of pouch cell batteries; and
a flexible cold plate disposed between at least two adjacent pouch cell batteries of the plurality of pouch cell batteries, wherein the flexible cold plate defines a cooling channel having an inlet and an outlet;

wherein the retaining seat defines a fluid delivery channel configured to couple to the inlet of the cooling channel of the flexible cold plate and a fluid return channel configured to couple to the outlet of the cooling channel of the flexible cold plate.

2. The aerospace battery of claim 1 , wherein the retaining seat comprises:
a base defining a plurality of apertures configured to at least one of receive therethrough at least one of respective cell tabs of each respective pouch cell battery of the plurality of pouch cell batteries or receive the inlet and the outlet of the flexible cold plate; and
frame members extending from the base and configured to receive and support the battery pack core.

3. The aerospace battery of claim 1 , wherein the retaining seat comprises a non-flammable plastic including one or more of a polyimide, a polybenzoxazole, a polybenzimidazole, a polybenzthiazole, a ladder polymer, an inorganic or a semiorganic polymer, cyclotriphosphazene, or polysialate.

4. The aerospace battery of claim 1 , wherein the retaining seat comprises a 3D-printed polymer.

5. The aerospace battery of claim 1 , wherein the flexible cold plate is configured to, during operation of the battery pack core, regulate a temperature of a first pouch cell battery and a second pouch cell battery of the plurality of pouch cell batteries and electrically isolate the first pouch cell battery and the second pouch cell battery.

6. The aerospace battery of claim 1 , wherein the flexible cold plate comprises a first flexible cold plate disposed between a first pouch cell battery and a second pouch cell battery of the plurality of pouch cell batteries, wherein the district further comprises:
a second flexible cold plate adjacent to the first pouch cell battery, opposite the first flexible cold plate; and
a third flexible cold plate adjacent to the second pouch cell battery, opposite the first flexible cold plate.

7. The aerospace battery of claim 1 , wherein the flexible cold plate is configured to, during operation of the battery pack core, conform to dimensional changes of a first pouch cell battery and a second pouch cell battery of the plurality of pouch cell batteries.

8. The aerospace battery of claim 1 , further comprising a closed cell foam disposed in the housing, wherein at least a portion of the closed cell foam is disposed between the battery pack core and the housing.

9. The aerospace battery of claim 8 , wherein the closed cell foam comprises a fire retardant and a polymer foam.

10. The aerospace battery of claim 1 , further comprising a ceramic jacket surrounding the at least one district.

11. The aerospace battery of claim 1 , wherein the housing comprises:
an outer layer comprising at least one of aluminum, an aluminum alloy, a steel alloy, titanium, or a titanium alloy; and
an inner layer comprising a ceramic paper.

12. An aerospace battery, comprising:
a housing;
a plurality of retaining seats disposed in the housing;
a plurality of battery pack cores, each supported by a respective retaining seat, wherein each battery pack core comprises a plurality of districts, each comprising:
a plurality of pouch cell batteries; and
a flexible cold plate disposed between at least two adjacent pouch cell batteries of the plurality of pouch cell batteries, wherein the flexible cold plate defines a cooling channel having an inlet and an outlet;

wherein each retaining seat defines a fluid delivery channel configured to couple to the inlet of the cooling channel of the flexible cold plate and a fluid return channel configured to couple to the outlet of the cooling channel of the flexible cold plate.

13. The aerospace battery of claim 12 , further comprising a cooling manifold fluidly coupled to the fluid delivery channel and the fluid return channel of each respective retaining seat.

14. The aerospace battery of claim 12 , further comprising a battery management system configured to electrically couple the plurality of pouch cell batteries of each respective district of a respective battery pack core in series.

15. The aerospace battery of claim 14 , wherein the battery management system comprises:
a printed circuit board defining apertures configured to receive therethrough respective cell tabs of each respective pouch cell battery of the plurality of pouch cell batteries; and
a busbar integrated with the printed circuit board and configured to couple with the respective cell tabs.

16. The aerospace battery of claim 15 , wherein the busbar comprises a flexible busbar.

17. A method comprising:
inserting a battery pack core into a retaining seat, wherein the retaining seat defines a fluid delivery channel and a fluid return channel, and wherein the battery pack core comprises at least one district comprising:
a plurality of pouch cell batteries; and
a flexible cold plate disposed between at least two adjacent pouch cell batteries of the plurality of pouch cell batteries, wherein the flexible cold plate defines a cooling channel having an inlet and an outlet, and;

fluidly coupling the inlet of the cooling channel of the flexible cold plate to the fluid delivery channel of the retaining seat; and
fluidly coupling the outlet of the cooling channel of the flexible cold plate to the fluid return channel of the retaining seat.

18. The method of claim 17 , wherein the method further comprises reactive molding a closed cell foam within the housing around the battery pack core, wherein the closed cell foam fills substantially all the space between the housing and the battery pack core.

19. The method of claim 17 , wherein the method further comprises:
positioning a printed circuit board on the battery pack core such that respective cell tabs of each respective pouch cell battery of the plurality of pouch cell batteries extend through apertures defined by the printed circuit board; and
electrically coupling the respective cell tabs to a busbar integrated with the printed circuit board.

20. The method of claim 19 , wherein electrically coupling the respective cell tabs to the busbar comprises at least one of soldering, spot welding, laser welding, ultrasonic welding, mechanical bolt joining, or clinching.

Assignees

• Rolls Royce Singapore Pte Ltd
• Rolls Royce Plc

Inventors

• Zagrodnik Michael Adam
• Siang Teh Yee
• Prabhu Mathivanan Anand
• Sivalingam Krishnamoorthi
• Mountain Stephen

Classifications

• H01M50/249 Primary

  specially adapted for aircraft or vehicles, e.g. cars or trains (constructional details of batteries specially adapted for electric vehicles B60L50/64) · CPC title

• H01M10/425

  Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing (printed circuits H05K1/00) · CPC title

• H01M10/613

  Cooling or keeping cold · CPC title

• H01M10/6554

  Rods or plates · CPC title

• H01M10/6557

  arranged between the cells · CPC title