Thermally regulated modular energy storage device and methods

• US 10,424,821 B2
• Filed: 04/03/2018
• Issued: 09/24/2019
• Est. Priority Date: 04/03/2017
• Status: Active Grant

• Current Assignee: Yotta Solar, Inc.
• Original Assignee: Yotta Solar, Inc.
• Inventors: Iyengar, Vikram N., Badkoobeh, Omeed
• Primary Examiner(s): Lee, James
• Application Number:
  US15/944,355
• Publication Number:
  US 20180287231A1
• Time in Patent Office: 539 Days
• CPC Class Codes: F28D 15/0275 Arrangements for coupling heat-pipes together or with other structures, e.g. with base blocks; Heat pipe cores
• CPC Class Codes: F28D 20/021 the latent heat storage material and the heat-exchanging means being enclosed in one container F28D20/023 - F28D20/028 take precedence
• CPC Class Codes: F28D 20/028 Control arrangements therefor
• CPC Class Codes: H01M 10/6551 Surfaces specially adapted for heat dissipation or radiation, e.g. fins or coatings
• CPC Class Codes: H01M 10/6552 Closed pipes transferring heat by thermal conductivity or phase transition, e.g. heat pipes
• CPC Class Codes: H01M 10/659 by heat storage or buffering, e.g. heat capacity or liquid-solid phase changes or transition
• CPC Class Codes: H01M 50/24 adapted for protecting batteries from their environment, e.g. from corrosion thermal insulation H01M10/658
• CPC Class Codes: Y02E 10/44 Heat exchange systems
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02E 60/14 Thermal energy storage
• CPC Class Codes: Y02E 70/30 Systems combining energy storage with energy generation of non-fossil origin
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries

Abstract

In some embodiments, a device may include one or more thermal insulation panels defining an enclosure and a phase change material (PCM) within the enclosure. The device may further include at least one unidirectional heat pipe including a proximal portion extending into the enclosure, a distal portion extending outside of the enclosure, and an intermediate portion between the proximal portion and the distal portion. In one aspect, the device may also include a heat sink including a plurality of heat fins configured to dissipate heat, the heat sink coupled to the distal end of the at least one unidirectional heat pipe.

Claims

1. A device comprising:

one or more vacuum insulated panels defining an enclosure;

a phase change material (PCM) within the enclosure, the phase change material comprising organic compounds;

a plurality of charge storage components in thermal contact with the PCM, the plurality of charge storage components including a lithium-ion battery;

at least one unidirectional heat pipe including a proximal portion extending into the enclosure, a distal portion extending outside of the enclosure, and an intermediate portion between the proximal portion and the distal portion, the intermediate portion including a bend to provide gravity-assisted unidirectional heat flow from the proximal portion to the distal portion; and

a housing sized to secure the one or more vacuum insulated panels, the PCM, and at least a portion of the unidirectional heat pipe;

wherein a melting temperature of the PCM is selected based on an operating parameter or ambient temperature profile of one or more of the plurality of charge storage components; and

wherein the one or more vacuum insulated panels, the PCM, and the at least one unidirectional heat pipe cooperate to provide passive thermal buffering to protect the plurality of charge storage components from overheating.

2. The device of claim 1, wherein the distal portion of the at least one unidirectional heat pipe is elevated relative to the proximal portion.

3. The device of claim 1, wherein:

when an ambient temperature is above or equal to a temperature threshold, vapor rises within the at least one unidirectional heat pipe from the proximal portion toward the distal portion through the intermediate portion to dissipate heat; and

when the ambient temperature is below the temperature threshold, the vapor does not rise within the at least one unidirectional heat pipe.

4. The device of claim 3, wherein:

when the ambient temperature is above or equal to the temperature threshold, the at least one unidirectional heat pipe operates to draw heat away from the PCM; and

when the ambient temperature is below the temperature threshold, the one or more vacuum insulated panels, the PCM, and the at least one unidirectional heat pipe cooperate to retain heat within the enclosure.

5. The device of claim 4, wherein the one or more vacuum insulated panels, the PCM, and the at least one unidirectional heat pipe to maintain a temperature of the plurality of charge storage components within a selected operating temperature range.

6. The device of claim 4, wherein the one or more vacuum insulated panels, the PCM, and the at least one unidirectional heat pipe to protect the plurality of charge storage components from sub-freezing temperatures.

7. The device of claim 1, further comprising a heat sink including a plurality of heat fins configured to dissipate heat, the heat sink coupled to the distal end of the at least one unidirectional heat pipe.

8. The device of claim 1, further comprising a top plate within the enclosure and including a plurality of channels configured to secure the proximal portion of the at least one unidirectional heat pipe.

9. The device of claim 1, wherein the PCM comprises at least one of an organic material and an inorganic material.

10. The device of claim 1, wherein each of the one or more vacuum insulated panels comprises a thin film material defining an evacuated enclosure and a core material within the evacuated enclosure.

11. The device of claim 10, wherein the core material comprises a ceramic porous structure.

12. The device of claim 1, further comprising an electrical circuit enclosed within the PCM.

13. A device comprising:

an electrical component including an integrated circuit;

a phase change material (PCM) disposed around the electrical component, the PCM comprising organic compounds configured to melt at a pre-determined temperature range;

at least one battery to dissipate heat to the PCM;

a plurality of vacuum insulated panels positioned to define an enclosure sized to receive the PCM and the electrical component, the plurality of vacuum insulated panels configured to provide thermal insulation, fire resistance, and physical structure;

a housing sized to secure the plurality of vacuum insulated panels, the phase change material (PCM), and the electrical component; and

at least one unidirectional heat pipe including;

a proximal portion extending into the enclosure;

a distal portion extending out of the enclosure; and

an intermediate portion between the proximal portion and the distal portion;

wherein the distal portion is elevated relative to the proximal portion;

wherein the PCM, the plurality of vacuum insulated panels, and the at least one unidirectional heat pipe cooperate to provide passive thermal buffering to maintain temperature of the electrical component and the at least one battery to prevent overheating.

14. The device of claim 13, further comprising a heat sink including a plurality of heat fins configured to dissipate heat, the heat sink coupled to the distal end of the at least one unidirectional heat pipe.

15. The device of claim 14, wherein:

when an ambient temperature is above or equal to a temperature threshold, vapor rises within the at least one unidirectional heat pipe from the proximal portion toward the distal portion through the intermediate portion to dissipate heat; and

when the ambient temperature is below the temperature threshold, the vapor does not rise within the at least one unidirectional heat pipe.

16. The device of claim 13, further comprising a top plate within the enclosure and including a plurality of channels configured to secure the proximal portion of the at least one unidirectional heat pipe.

17. The device of claim 13, wherein the PCM comprises at least one of an organic material and an inorganic material.

18. The device of claim 13, wherein the vacuum insulated panel includes a thin film material defining an evacuated enclosure and includes a core material within the evacuated enclosure, wherein the core material comprises a porous ceramic structure.

19. A device comprising:

a housing including a base portion and a cover portion defining an enclosure, the base portion including a bottom, a first side, a second side, a third side, and a fourth side, the first, second, and fourth sides having substantially equal heights, the third side having a height that is shorter than the first, second, and fourth sides to provide a space between the base portion and the cover portion on the third side;

a plurality of vacuum insulated panels arranged around an interior periphery of the enclosure;

an electrical component including at least one of an integrated circuit and a lithium-ion battery within the enclosure;

a phase change material (PCM) within the enclosure and around the electrical component, the PCM to melt to dissipate heat generated by the electrical component; and

a unidirectional heat pipe including a proximal portion extending into the enclosure, a distal portion extending through the space and away from the enclosure, and an intermediate portion between the proximal portion and the distal portion and including a physical feature to provide a heat rectifier function;

wherein a melt temperature of the PCM is selected based on an operating parameter or ambient temperature profile of the electrical component; and

wherein the plurality of vacuum insulated panels, the PCM, and the unidirectional heat pipe cooperate to provide passive thermal buffering to maintain temperature of the electrical component to prevent overheating.

20. The device of claim 19, the physical feature causes the distal portion to be elevated relative to the proximal portion.

21. The device of claim 19, wherein:

when an ambient temperature is above or equal to a temperature threshold, vapor rises within the at least one unidirectional heat pipe from the proximal portion toward the distal portion through the intermediate portion to dissipate heat; and

when the ambient temperature is below the temperature threshold, the vapor does not rise within the at least one unidirectional heat pipe.

22. The device of claim 19, wherein the electrical component comprises at least one battery.