Battery Energy Storage System and Controlling Method

• US 20160134147A1
• Filed: 06/13/2013
• Published: 05/12/2016
• Est. Priority Date: 06/13/2013
• Status: Abandoned Application

• Current Assignee: Firebright1 Green Energy Limited
• Original Assignee: Firebright1 Green Energy Limited
• Inventors: Shen, Fang, Chen, Jie
• Application Number:
  US14/898,105
• Publication Number:
  US 20160134147A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H02J 2207/20 Charging or discharging characterised by the power electronics converter
• CPC Class Codes: H02J 9/061 for DC powered loads

Abstract

The invention relates to a battery energy storage system (10) and controlling method, wherein the battery energy storage system comprising: an input (102) capable of connecting with a grid; a first output (104) capable of connecting with a first load; a charge controller (108) connected to the input (102) and adapted to convert an alternating current power supply from the input (102) to a direct current power supply; a battery (110) connected to the charge controller (108) and adapted to store the direct current power supply converted by the charge controller (108); an inverter (112) connected to the battery (110) and the first output (104) and adapted to convert a direct current power supply stored in the battery (110) to an alternating current power supply and output the converted alternating current power supply to the first output (104); a first switch (114) connected to the input (102) and the first output (104); and an energy management system (118) adapted to control the charge controller (108), the inverter (112) and the first switch (104), wherein the energy management system (118) turns on the first switch (104) when the energy management system (118) detects that there is energy on the input (102) and turns off the first switch (104) when the energy management system (118) detects that there is no energy on the input (102). With the battery energy storage system (10) and the controlling method, the load power is not limited by the drive capability of the inverter of the battery energy storage system (10).

Claims

1. A battery energy storage system (10), comprising:

an input (102) capable of connecting with a grid;

a first output (104) capable of connecting with a first load;

a charge controller (108) connected to the input (102) and adapted to convert an alternating current power supply from the input (102) to a direct current power supply;

a battery (110) connected to the charge controller (108) and adapted to store the direct current power supply converted by the charge controller (108);

an inverter (112) connected to the battery (110) and the first output (104) and adapted to convert a direct current power supply stored in the battery (110) to an alternating current power supply and output the converted alternating current power supply to the first output (104);

a first switch (114) connected to the input (102) and the first output (104); and

an energy management system (118) adapted to control the charge controller (108), the inverter (112) and the first switch (104),

wherein the energy management system (118) turns on the first switch (104) when the energy management system (118) detects that there is energy on the input (102) and turns off the first switch (104) when the energy management system (118) detects that there is no energy on the input (102).

2. The battery energy storage system (10) of claim 1, wherein further comprising:

a second output (106) capable of connecting with a second load; and

a second switch (116) connected between the second output (106) and the input (102), which is controlled by the energy management system (118),

wherein the energy management system (118) turns on the second switch (106) when the energy management system (118) detects that there is energy on the input (102) and turns off the second switch (106) when the energy management system (118) detects that there is no energy on the input (102).

3. A controlling method executed by an energy management system (118) included in a battery energy storage system (10), wherein the battery energy storage system (10) further comprises:

an input (102) capable of connecting with a grid;

a first output (104) capable of connecting with a first load;

a charge controller (108) connected to the input (102) and adapted to convert an alternating current power supply from the input (102) to a direct current power supply;

a battery (110) connected to the charge controller (108) and adapted to store the direct current power supply converted by the charge controller (108);

an inverter (112) connected to the battery (110) and the first output (104) and adapted to convert a direct current power supply stored in the battery (110) to an alternating current power supply and output the converted alternating current power supply to the first output (104);

a first switch (114) connected to the input (102) and the first output (114), wherein the energy management system (118) is adapted to control the charge controller (108), the inverter (112) and the first switch (104), the controlling method comprising;

detecting whether there is energy on the input; and

turning on the first switch (114) when it is detected that there is energy on the input (102); and

turning off the first switch (114) when it is detected that there is energy on the input (102).

4. The controlling method of claim 3, wherein

the battery energy storage system (10) further comprises:

a second output (106) capable of connecting with a second load; and

a second switch (116) connected between the second output (106) and the input (102), which is controlled by the energy management system (118),

the controlling method further comprising;

turning on the second switch (106) when it is detected that there is energy on the input (102); and

turning off the second switch (106) when it is detected that there is no energy on the input (102).