Controller for energy storage, system comprising the same, and methods of using the same

Patent metadata

Field	Value
Publication number	US-11799140-B2
Application number	US-202117201529-A
Country	US
Kind code	B2
Filing date	Mar 15, 2021
Priority date	Mar 15, 2021
Publication date	Oct 24, 2023
Grant date	Oct 24, 2023

Abstract

An electrical energy storage system, a controller, and methods of using the same are provided. The system includes battery packs connected in parallel, one or more battery power management unit, one or more power converters, and a controller. The controller includes one or more processor and at least one tangible, non-transitory machine readable medium encoded with one or more programs configured to perform steps for discharging or charging. The steps include: reading data including state of health (SOH) and state of charge (SOC) from each battery pack, connecting a respective battery pack with a respective power converter; receiving a power command from an energy management system, calculating a respective power rate of each battery pack based on the data of SOH, SOC, and the power command, and discharging power from battery packs to a grid or charging power to battery packs based on the power rate of each battery pack.

First claim

What is claimed is:

1. An electrical energy storage system, comprising:
a plurality of battery packs connected in parallel;
one or more battery power management unit (BPMU), each BPMU connected with one or more battery packs and configured to monitor and control the one or more battery packs;
one or more power converters, each power converter coupled with at least one battery pack and configured to convert direct current (DC) from the at least one battery pack to alternating current (AC) or vice versa; and
a controller using multi-source inputs smart technology (MIST) and comprising one or more processor and at least one tangible, non-transitory machine readable medium encoded with one or more programs configured to perform steps of:
reading data including state of health (SOH) and state of charge (SOC) from each battery pack;
connecting a respective battery pack with a respective power converter;
receiving a power command from an upper level energy management system (EMS);
calculating a respective power rate of each battery pack based on the SOH and the SOC of each battery pack and the power command from the EMS; and
discharging power from or charging power to the plurality of battery packs based on the power rate of each battery pack,

wherein the controller is configured to calculate the respective power rate (P r ) of each battery pack according to equations (1) and (2):

a
i

=

100
⁢
%
*

{

SOH
i

⁡

(

1
-

SOC
i

)

∑
i

⁢

SOH
i

⁡

(

1
-

SOC
i

)

,
Charge

SOH
i

*

SOC
i

∑
i

⁢

SOH
i

*

SOC
i

,
Discharge

⁢

⁢
and

,

(
1
)

P
i

=

min
⁡

(

P
iMax

,

P
T

*

a
i

)

,

(
2
)

wherein SOH and SOC are the SOH and the SOC of each battery pack, respectively, P T is the power command from the EMS, P imax is the maximum capacity of each bat

Assignees

• China Energy Investment Corp Ltd
• Nat Inst Clean & Low Carbon Energy

Inventors

• Sharma Ratnesh
• Singh Surinder
• Yu Peng
• Zhou You
• Zhao Lulu
• Ohara Brandon

Classifications

• H02J7/84

  Control of state of health [SOH] · CPC title

• H02J7/82

  Control of state of charge [SOC] · CPC title

• H02J7/96

  in response to battery voltage · CPC title

• H02J7/971

  the charge cycle being controlled or terminated in response to non-electric parameters · CPC title

• H02J7/50 Primary

  acting upon multiple batteries simultaneously or sequentially · CPC title