Integrated electrical and thermal energy storage

12191,537

17/358597

June 25, 2021

A system includes a flow battery and a temperature control system. The flow battery is configured to thermally manage a thermal load. In some embodiments, the flow battery is also configured to electrically power the thermal load. The temperature control system is configured to cool electrolyte in the flow battery in response to the thermal load being inactive.

Rolls-Royce North American Technologies, Inc. (Indianapolis, IN, US)

Rolls-Royce North American Technologies Inc. (Indianapolis, IN, US)

1. A system comprising: a flow battery; a temperature control system configured to cool an electrolyte of the flow battery in response to a thermal load being inactive; and a circulation system configured to circulate a fluid between the flow battery, the temperature control system, and the thermal load, wherein the temperature control system is fluidly positioned in the circulation system downstream from the thermal load and upstream from the flow battery, such that the fluid, after passing through the thermal load, passes through the temperature control system before reaching the flow battery, and wherein the temperature control system is configured to cool the fluid received from the thermal load when the thermal load is inactive and deliver the cooled fluid to the flow battery to cool the electrolyte without the use of an additional thermal storage device.

2. The system of claim 1 , wherein the fluid cools the thermal load when the thermal load is active.

3. The system of claim 1 , wherein the temperature control system is configured to deliver the fluid to a heat exchanger positioned in an electrolyte tank of the flow battery.

4. The system of claim 1 , wherein the temperature control system is configured to heat the electrolyte in response to the thermal load being active.

5. The system of claim 1 , wherein the temperature control system comprises a vapor cycle system.

6. The system of claim 1 , further comprising a heat exchanger configured to transfer heat from the fluid to the electrolyte when the electrolyte is flowing from an electrolyte tank to a reactor of the flow battery.

7. The system of claim 6 , wherein the circulation system is configured to deliver the fluid from the heat exchanger to the temperature control system.

8. The system of claim 7 , wherein the circulation system is configured to bypass the heat exchanger in response to the thermal load being inactive.

9. The system of claim 1 , wherein the flow battery is configured to electrically power the thermal load.

10. A system comprising: a thermal load; a flow battery configured to: electrically power the thermal load; and cool the thermal load with an electrolyte without the use of an additional thermal storage device; a temperature control system configured to cool the electrolyte; a first heat exchanger positioned in an electrolyte tank of the flow battery, the first heat exchanger configured to exchange heat between the electrolyte in the electrolyte tank and a liquid used to cool the thermal load; and a second heat exchanger positioned between the electrolyte tank and a reactor of the flow battery, the second heat exchanger configured to: receive the fluid from the thermal load; and heat the electrolyte with the fluid as the electrolyte flows from the electrolyte tank to the reactor.

11. The system of claim 10 , wherein the flow battery is configured to cool the fluid with the electrolyte in order to cool the thermal load.

12. The system of claim 11 , wherein the temperature control system is configured to cool the fluid in order to cool the electrolyte in response to the thermal load being inactive.

13. A system comprising: a flow battery; a temperature control system connected in parallel with a thermal load, the temperature control system configured to cool an electrolyte of the flow battery in response to a thermal load being inactive; and a circulation system configured to: circulate the fluid between the flow battery, the temperature control system, and the thermal load; bypass the thermal load in response to the thermal load being inactive; and bypass the temperature control system in response to the thermal load being active, wherein the circulation system does not include a bypass valve configured to bypass the flow battery.

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Babu R. Chalamala et al., “Redox Flow Batteries: An Engineering Perspective”, 2014, 24 pgs. cited by applicant
Sunny Maye, et al., “Thermally regenerative copper nanoslurry flow batteries for heat-to-power conversion with low-grade thermal energy”, May 19, 2020, 9 pgs. cited by applicant

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