Systems and techniques for energy storage regulation

Patent metadata

Field	Value
Publication number	US-9735601-B2
Application number	US-201514848711-A
Country	US
Kind code	B2
Filing date	Sep 9, 2015
Priority date	Sep 9, 2015
Publication date	Aug 15, 2017
Grant date	Aug 15, 2017

Abstract

Systems and techniques are disclosed for individually controlling energy storage devices in an array of devices. An energy storage regulation unit (ESRU) is described that enables the connection of an energy storage device to a system load bus and a charging/diagnostic bus such that the energy storage device may be individually charged and/or disconnected for maintenance. The ESRU comprises switches for selectively connecting the system load bus circuit, charging circuit, or a bypass circuit. An energy storage regulator is further described for enabling the control of one or more ESRUs. A regulator controller may receive sensor or measurement data from the ESRUs connected to the energy storage regulator, and may also issue control instructions that control the switches of the individual ESRUs. Measurement data can include, for example, voltage, current, or temperature information relating to a specific ESRU.

First claim

What is claimed is:

1. An energy storage regulator for an energy system, the regulator comprising:
one or more energy storage regulation units, each energy storage regulation unit comprising:
a positive load bus switch for selectively connecting a positive terminal of an energy storage device to an energy system load bus;
a negative load bus switch for selectively connecting a negative terminal of the energy storage device to the energy system load bus;
a pair of charging switches for selectively connecting the energy storage device to an energy system charging bus; and
a bypass switch for selectively maintaining continuity across the energy system load bus when both the positive load bus switch and the negative load bus switch are disconnected; and

a regulator controller connected to the one or more energy storage regulation units and being operable to, in response to receiving measurement data from one or more measurement devices pertaining to at least one of the one or more energy storage regulation units;
determine an operating modality for a particular one or more energy storage regulation units; and
send a control instruction in accordance with the operating modality to the particular one or more energy storage regulation units,

the control instruction for a normal modality directing the positive load bus switch to close, the negative load bus switch to close, the bypass switch to open, and the pair of charging switches to open,
the control instruction for a charging modality directing the pair of charging switches to close, the positive load bus switch to open, the negative load bus switch to open, and the bypass switch to close,
the control instruction for a bypass modality directing the bypass switch to close, the positive load bus switch to open, the negative load bus switch to open, and the pair of charging switches to open,
the positive load bus switch being electrically directly connected to the positive terminal of the energy storage device, and
the negative load bus switch being electrically directly connected to the negative terminal of the energy storage device.

2. The energy storage regulator of claim 1 , wherein the one or more measurement devices include a device connected to measure voltage across the energy system load bus of a particular energy storage regulation unit.

3. The energy storage regulator of claim 1 , wherein the one or more measurement devices include a device connected to measure amperage drawn from a particular energy storage device of a particular energy storage regulation unit.

4. The energy storage regulator of claim 1 , wherein the one or more measurement devices include a device to measure a temperature of a particular energy storage regulation unit.

5. The energy storage regulator of claim 1 , wherein the regulator controller is further operable to send the measurement data to a supervisory monitoring and control center, receive a directing instruction from the supervisory monitoring and control center, and wherein determining the operating modality comprises interpreting the directing instruction.

6. The energy storage regulator of claim 1 , wherein determining the operating modality comprises analyzing a pulsed load state of the energy system and determining the normal modality when the pulsed load state is active and the charging modality when the pulsed load state is inactive.

7. The energy storage regulator of claim 1 , wherein the regulator controller comprises a processing system, one or more computer readable media, and program instructions stored on the one or more computer readable media executable by the processing system.

8. The energy storage regulator of claim 1 , wherein the regulator controller comprises a microcontroller.

9. The energy storage regulator of claim 1 , wherein each energy storage regulation unit further comprises an interlock mechanism that prevents the simultaneous closing of all of the positive load bus switch, the negative load bus switch, the pair of charging switches, and the bypass switch.

10. The energy storage regulator of claim 1 , wherein one or more of the positive load bus switch, the negative load bus switch, the pair of charging switches, and the bypass switch of the one or more energy storage regulation units is a relay.

11. The energy storage regulator of claim 1 , wherein one or more of the positive load bus switch, the negative load bus switch, the pair of charging switches, and the bypass switch of the one or more energy storage regulation units is a metal-oxide-semiconductor field-effect transistor (MOSFET).

12. The energy storage regulator of claim 1 , wherein the energy storage device of the one or more energy storage regulation units comprises a battery.

13. The energy storage regulator of claim 1 , wherein the energy storage device of the one or more energy storage regulation units is selected from the group consisting of a super-capacitor and an ultra-capacitor.

14. An energy storage regulation unit for an energy system, comprising:
a positive load bus switch for selectively connecting a positive terminal of an energy storage device to an energy system load bus;
a negative load bus switch for selectively connecting a negative terminal of the energy storage device to the energy system load bus;
a pair of charging switches for selectively connecting the energy storage device to an energy system charging bus; and
a bypass switch for selectively maintaining continuity across the energy system load bus when both the positive load bus switch and the negative load bus switch are disconnected;
a normal modality being enabled when the first load bus is connected, the second load bus switch is connected, the bypass switch is disconnected, and the pair of charging switches are disconnected,
a charging modality being enabled when the pair of charging switches are connected, the first load bus is disconnected, the second load bus switch is disconnected, and the bypass switch is connected,
a bypass modality being enabled when the bypass switch is connected, the first load bus is disconnected, the second load bus switch is disconnected, and the pair of charging switches are disconnected,
the positive load bus switch being electrically directly connected to the the energy storage device, and
the negative load bus switch being electrically directly connected to the negative terminal of the energy storage device.

15. The energy storage regulation unit of claim 14 , wherein one or more of the positive load bus switch, the negative load bus switch, the pair of charging switches, and the bypass switch is a relay.

16. The energy storage regulation unit of claim 14 , wherein one or more of the positive load bus switch, the negative load bus switch, the pair of charging switches, and the bypass switch is a metal-oxide-semiconductor field-effect transistor (MOSFET).

17. The energy storage regulation unit of claim 14 , wherein the energy storage device comprises a battery.

18. The energy storage regulation unit of claim 14 , wherein the energy storage device is selected from the group consisting of a super-capacitor and an ultra-capacitor.

19. The energy storage regulation unit of claim 14 , further comprising an interlock mechanism that prevents the simultaneous closing of all of the positive load bus switch, the negative load bus switch, the pair of charging switches, and the bypass switch.

Assignees

• MOHAMMED Osama
• Elsayed Ahmed
• LASHWAY Christopher
• Youssef Tarek A
• Univ Florida Int

Inventors

• MOHAMMED Osama
• Elsayed Ahmed
• LASHWAY Christopher
• Youssef Tarek A

Classifications

• H02J7/82

  Control of state of charge [SOC] · CPC title

• H02J7/963

  in response to battery voltage gradient · CPC title

• H02J7/927

  with introduction of pulses during the charging process · CPC title

• H02J7/80

  including monitoring or indicating arrangements · CPC title

• H02J7/56

  Active balancing, e.g. using capacitor-based, inductor-based or DC-DC converters · CPC title