TWI817760B - Power management method - Google Patents

Abstract

The present disclosure relates to a system and a method for power management. The system includes a charging device, a power supply device, a power storage device, and a control system. The charging device is configured to charge one or more loads. The power supply device is configured to provide a first power. The power storage device is configured to provide a second power. The control system is configured to allow the power supply device to provide the first power to the charging device and/or to allow the power storage device to provide the second power to the charging device based on a predetermined condition.

Description

Power management methods

The invention relates to an electric energy management system and an electric energy management method.

In recent years, with the advancement of electric vehicle technology, electric vehicles have become more and more popular, which has subsequently increased the demand for charging equipment (such as charging piles or charging stations). Currently, most charging equipment on the market receives electric energy (such as alternating current) from the power transmission and distribution industry and directly converts it into electric energy suitable for charging electric vehicles (such as direct current) for charging electric vehicles. However, the charges of the power transmission and distribution industry during the peak period of electricity consumption are higher than those during the ionization peak period. If most electric vehicle users go to charging equipment to charge during the peak period of electricity consumption, it will increase the cost of charging equipment manufacturers.

In addition, charging equipment manufacturers usually sign contractual capacity contracts with the power transmission and distribution industry. If multiple electric vehicles charge at the charging equipment at the same time, causing the power output of the charging equipment to exceed the contracted capacity, overcontracted power consumption may occur. problem, significantly increasing the cost of charging equipment manufacturers.

One embodiment of the present disclosure relates to a power management system. The power management system includes a charging device, a power supply device, an energy storage device and a control device. The charging device charges one or more loads. The power supply device provides a first electrical energy. The energy storage device provides a second electrical energy. The control system controls the power supply device to provide the first electric energy to the charging device and/or the energy storage device to provide the second electric energy to the charging device according to a predetermined condition.

Another embodiment of the present disclosure relates to a power management method. The power management method includes: determining whether the SOC of an energy storage battery is greater than or equal to a first predetermined value; if the SOC of the energy storage battery is greater than or equal to the first predetermined value, controlling the energy storage battery to provide a first electrical energy to A charging device to charge one or more loads and stop a power supply device from charging the energy storage battery; and if the SOC of the energy storage battery is less than the first predetermined value, control the energy storage battery to provide the The first electric energy is supplied to the charging device to charge one or more loads, and the power supply device starts charging the energy storage battery.

Referring to FIG. 1 , FIG. 1 is a schematic diagram of a power management system 1 according to some embodiments of the present disclosure. The power management system 1 can be a charging device (such as a charging pile or charging station) for electric vehicles, electric motorcycles, portable electronic products (such as mobile phones, tablets, laptops, power banks, etc.) or applied in other fields The power management system. In some embodiments, the power management system 1 includes a power supply device 11 , an energy storage device 12 , a charging device 13 , a control system 14 and a server device 15 . In some embodiments, the power management system 1 includes an energy storage device 12 , a charging device 13 , a control system 14 and a server device 15 . In some embodiments, the power management system 1 includes an energy storage device 12 , a charging device 13 and a control system 14 .

In some embodiments, the power supply device 11 may be configured to provide power to the charging device 13 . In some embodiments, the power supply device 11 may be configured to provide electrical energy to the energy storage device 12 . In some embodiments, the power supply device 11 may be configured to provide power to the charging device 13 and the energy storage device 12 at the same time. In some embodiments, the power supply device 11 may have an electric meter (such as a general electric meter or a smart electric meter) 111 configured to measure the electric energy provided by the power supply device 11 or the electric energy provided by the transmission line 11a.

In some embodiments, the power supply device 11 may include a power transmission line (or power grid) 11a. According to some embodiments of the present invention, the power supply device 11 may also include other infrastructure such as generators, substations, power distribution systems, transformers, and power lines. In this disclosure, the power supply device 11 refers to a device configured to provide electric energy (such as electric energy provided by the power transmission and distribution industry or locally produced electric energy, etc.). In some embodiments, the transmission line 11a may include a network system that connects power producers or power transmission and distribution industries (such as Taiwan Electric Power Co., Ltd.) and power users for the purpose of transmitting power.

In some embodiments, the power supply device 11 may further include a power conditioning system (Power Conditioning System, PCS) 112 . The power conditioning system 112 can be configured to control the amount of electric energy output by the power supply device 11 and/or the power supply target (such as the energy storage device 12, the charging device 13, or both). The power conditioning system 112 may include a power converter configured to receive electrical energy provided by the transmission line 11a and to generate or output converted electrical energy. For example, the power converter may be configured to convert alternating current power provided by power transmission line 11a into direct current power. In other words, the power converter may be or may include an AC/DC converter. For example, the power converter may be configured to convert the voltage provided by power transmission line 11a to a lower voltage. In other words, the power converter may be or may include a transformer.

In some embodiments, energy storage device 12 may be configured to receive electrical energy and store electrical energy. For example, the energy storage device 12 may be configured to receive electrical energy from the power supply device 11 and store the electrical energy. Energy storage device 12 may be configured to provide electrical energy to charging device 13 . In some embodiments, the energy storage device 12 may be or may include a battery energy storage system (Battery Energy Storage System, BESS).

In some embodiments, the energy storage device 12 may include a power conditioning system 121, an energy storage battery 122, and a communication module 123. In some embodiments, the power conditioning system 121, the energy storage battery 122 and the communication module 123 may be electrically connected to each other. In some embodiments, the power conditioning system 121 and the communication module 123 can be integrated so that a single electronic device can realize all its functions. In some embodiments, the power conditioning system 121 and the communication module 123 can be dispersed in several devices, and all their functions can be implemented by multiple devices.

In some embodiments, the power conditioning system 121 may be configured to control the charging and discharging process of the energy storage battery 122 . In some embodiments, the power conditioning system 121 may include an energy storage converter. In some embodiments, the energy storage battery 122 may include a battery, a battery pack, or a battery module.

In some embodiments, communication module 123 may be configured to transmit or receive information. For example, in some embodiments, the communication module 123 may be configured to provide the status of the energy storage device 12 and/or information related to the status of the energy storage device 12 to the control system 14 . In some embodiments, the status of the energy storage device 12 may include the battery state of charge (SOC) of the energy storage battery 122 and/or the battery state of health (State of Health, SOH) of the energy storage battery 122 .

In some embodiments, the communication module 123 includes wired communication devices, such as wires or optical fibers. In some embodiments, the communication module 123 includes a wireless communication device, such as a Wi-Fi module, a mobile network communication module, a Bluetooth module, a near field communication module, etc.

In some embodiments, the charging device 13 may be configured to receive electrical energy provided by the power supply device 11 and/or the electrical energy provided by the energy storage device 12 , and configured to provide electrical energy to one or more loads 16 to Charge load 16. In some embodiments, the charging device 13 may be a charging pile or a charging station. In some embodiments, the load 16 may be or include an electric vehicle, an electric motorcycle, a portable electronic product (such as a mobile phone, a tablet, a notebook computer, a power bank, etc.), etc.

In some embodiments, the charging device 13 includes a power converter 131, a processor 132 and a communication module 133. In some embodiments, the power converter 131, the processor 132 and the communication module 133 may be electrically connected to each other. In some embodiments, the processor 132 and the communication module 133 can be integrated so that a single electronic device can realize all its functions. In some embodiments, the processor 132 and the communication module 133 can be dispersed in several devices, and all their functions can be implemented by multiple devices.

The power converter 131 may be configured to receive the electrical energy provided by the power supply device 11 and/or the energy storage device 12 and provide the converted electrical energy to the load 16 . For example, the power converter 131 may be configured to convert the DC voltage provided by the power supply device 11 and/or the energy storage device 12 into a lower DC voltage. In other words, the power converter 131 may be or include a transformer or a DC/DC converter. In some embodiments, the power converter 131 of the charging device 13 may also be configured to directly receive the AC voltage provided by the power transmission line 11a and convert the AC voltage into a DC voltage. In other words, the power converter 131 may be or include a transformer or an AC/DC converter.

The processor 132 may be configured to control the charging device 13 to receive power and provide power to the load 16 . In some embodiments, the processor 132 may include a CPU, MCU, GPU, etc.

In some embodiments, communication module 133 may be configured to transmit or receive information. For example, communication module 133 may be configured to receive instructions from control system 14 . The communication module 133 can be configured to send information about the load 16 to the control system 14 . The information of the loads 16 may include the number of the loads 16, the power required by the loads 16, etc.

In some embodiments, the communication module 133 includes wired communication devices, such as wires or optical fibers. In some embodiments, the communication module 133 includes a wireless communication device, such as a Wi-Fi module, a mobile network communication module, a Bluetooth module, a near field communication module, etc.

In some embodiments, control system 14 may be configured to compute, update, store, and/or manage information. For example, the control system 14 may be configured to control power supply to the charging device 13 by the power supply device 11 , the energy storage device 12 , or both simultaneously. For example, the control system 14 may be configured to control the power supply device 11 to provide electrical energy to the charging device 13, the energy storage device 12, or both. The control system 14 can be configured to control the system according to the time (such as during the ionization peak period or the power consumption peak period), the state of the energy storage device 12 (such as the SOC or SOH of the energy storage battery 122), and the information of the load 16 (such as the load 16 total quantity or required power consumption), the power supply device 11, the energy storage device 12, or both are controlled to supply power to the charging device at the same time. For example, the control system 14 may be configured to control the power supply device 11 to provide electric energy to the energy storage device 12 during the ionization peak period to charge the energy storage device 12 . The control system 14 may be configured to control the energy storage device 12 to provide electrical energy to the charging device 13 to charge the load 16 during the ionization peak. The control system 14 may be configured to control the power supply device 11 to directly provide electric energy to the charging device 13 to charge the load 16 during the ionization peak period. The control system 14 can be configured to control the power supply device 11 to simultaneously provide electric energy to the charging device 13 and the energy storage device 12 during the ionization peak period. The control system 14 may be configured to control the energy storage device 12 to provide electric energy to the charging device 13 to charge the load 16 during peak power usage. The control system 14 can be configured to control the energy storage device 12 to provide electric energy to the charging device 13 when the total power consumption of the load 16 exceeds a predetermined value (such as the contract capacity signed with the power transmission and distribution industry) to charge the load. 16 charges. The control system 14 can be configured to operate when the total power consumption of the load 16 exceeds a predetermined value (such as the contract capacity signed with the power transmission and distribution industry) or the SOC of the energy storage battery 122 of the energy storage device 12 is less than a predetermined value. , reduce the maximum power for charging load 16.

In some embodiments, the control system 14 may be or may include an energy management system (Energy Management System, EMS) and/or a charging station local controller (Charging Station Local Controller, CSLC), etc. In some embodiments, the control system 14 may include a processor 141, a memory 142, and a communication module 143. In some embodiments, the processor 141, the memory 142 and the communication module 143 may be electrically connected to each other. In some embodiments, the processor 141, the memory 142 and the communication module 143 can be integrated so that a single electronic device can realize all its functions. In some embodiments, the processor 141, the memory 142 and the communication module 143 can be dispersed in several devices, and all their functions can be implemented by multiple devices. In some embodiments, the control system 14 can be integrated into the charging device 13 or the energy storage device 12 .

In some embodiments, processor 141 may be configured to execute computer-executable instructions stored on memory 142 . In some embodiments, the computer-executable instructions stored in the memory 142 may include computer-executable instructions for executing the process shown in FIG. 2 (refer to FIG. 2, which will be described later). In some embodiments, the processor 141 may include a CPU, MCU, GPU, etc.

In some embodiments, communication module 143 may be configured to transmit or receive information. For example, the communication module 143 can be configured to perform data transmission with the power supply device 11 , the energy storage device 12 , the charging device 13 and the server device 15 . In some embodiments, the communication module 143 includes wired communication devices, such as wires or optical fibers. In some embodiments, the communication module 143 includes a wireless communication device, such as a Wi-Fi module, a mobile network communication module, a Bluetooth module, a near field communication module, etc.

In some embodiments, the server device 15 (or computer) may be a backend device, which may be installed at the location where the charging device 13 is located, in a remote office, or provided by a third-party cloud platform. The server device 15 may be or may include a charging station management system (Charging Station Management System, CSMS). In some embodiments, server device 15 may be configured to compute, update, store, and/or manage information provided by control system 14 . In some embodiments, charging stations located at different locations may have individual power supply devices 11 , energy storage devices 12 , charging devices 13 and control systems 14 . The server device 15 can be configured to receive data sent by the control system 14 of each charging station to simultaneously manage charging stations located in different locations. In some embodiments, the server device 15 can be omitted, and the charging station is managed by the control system 14 of the charging station in each location.

In some embodiments, the server device 15 may include a processor 151, a memory 152 and a communication module 153. In some embodiments, the processor 151, the memory 152 and the communication module 153 may be electrically connected to each other. In some embodiments, the processor 151, the memory 152, and the communication module 153 can be integrated so that a single electronic device can realize all its functions. In some embodiments, the processor 151, the memory 152 and the communication module 153 can be dispersed in several devices, and all their functions can be implemented by multiple devices.

In some embodiments, processor 151 may be configured to execute computer-executable instructions stored on memory 152 . In some embodiments, the computer-executable instructions stored in the memory 152 may include computer-executable instructions for executing the process shown in FIG. 2 (refer to FIG. 2, which will be described later). In some embodiments, the control system 14 may execute the process shown in FIG. 2 , or the server device 15 may execute the process shown in FIG. 2 . In some embodiments, the processor 151 may include a CPU, MCU, GPU, etc.

In some embodiments, communication module 153 may be configured to transmit or receive information. For example, the communication module 153 can be configured to transmit data with the control system 14 of each charging station. In some embodiments, the communication module 153 includes wired communication devices, such as wires or optical fibers. In some embodiments, the communication module 153 includes a wireless communication device, such as a Wi-Fi module, a mobile network communication module, a Bluetooth module, a near field communication module, etc.

FIG. 2 shows a flowchart 20 of a power management method according to some embodiments of the present disclosure. In some embodiments, the steps disclosed in FIG. 2 may be performed by the power management system 1 of FIG. 1 or other suitable management systems. In some embodiments, the steps disclosed in FIG. 2 can be executed by the control system 14 in FIG. 1 and transmit relevant information or data to the server device 15 . In some embodiments, the steps disclosed in FIG. 2 can be executed by the server device 15 in FIG. 1 and send instructions to the control system 14 to perform corresponding operations. In some embodiments, some of the steps disclosed in FIG. 2 can be executed by the server device 15 of FIG. 1 , and other steps can be executed by the control system 14 .

Step S21 determines whether it is a power consumption peak period. In some embodiments, the power peak period may be determined by the transmission and distribution industry. For example, the period from 7:30 am to 10:30 pm can be set as the peak power consumption period, and the period from 10:30 pm to 7:30 am the next day can be set as the ionization peak time. Electricity charges during peak electricity consumption periods are higher than those during ionization peak periods.

If it is determined that the ionization peak period is used, step S22 is executed. Step S22 determines whether the SOC of the energy storage battery 122 is greater than or equal to a first predetermined value. In some embodiments, the first predetermined value is greater than or equal to 80%. For example, the first predetermined value may be 80%, 85%, 90%, 95%, 100% or other values between 80% and 100%.

If it is determined that the SOC of the energy storage battery 122 is greater than or equal to the first predetermined value, step S23 is executed. Step S23 controls the energy storage battery 122 to provide power to the charging device 13 . In other words, the electric energy used by the power supply device 13 to charge the load 16 is provided by the energy storage battery 122 . In some embodiments, the maximum charging power that the charging device 13 can provide to the load 16 is related to the maximum power that the energy storage battery 122 can provide. In some embodiments, the maximum charging power that the charging device 13 can provide to the load 16 is approximately equal to the maximum power that the energy storage battery 122 can provide. For example, if the maximum power of the energy storage battery 122 is 120 kW, the maximum charging power that the charging device 13 can provide to the load 16 is 120 kW. In some embodiments, in step S23, the power supply device 11 does not provide power to the charging device 13. In some embodiments, in step S23, the power supply device 11 may also provide power to the charging device 13.

If it is determined that the SOC of the energy storage battery 122 is less than the first predetermined value, step S24 is executed. Step S24 controls the power supply device 11 and/or the energy storage battery 122 to supply power to the charging device 13 , and controls the power supply device 11 to charge the energy storage battery 122 . The maximum charging power that the charging device 13 can provide to the load 16 is related to the maximum power that the energy storage battery 122 can provide. In some embodiments, the maximum charging power that the charging device 13 can provide to the load 16 is approximately equal to the maximum power that the energy storage battery 122 can provide. For example, if the maximum power of the energy storage battery 122 is 120kW, the maximum charging power that the charging device 13 can provide to the load 16 is 120kW. In some embodiments, the power supply device 11 charges the energy storage battery 122 with the contracted capacity signed with the power transmission and distribution industry. For example, if the contract capacity signed with the power transmission and distribution industry is 30kW, the power supply device 11 charges the energy storage battery 122 with a power of 30kW. In some embodiments, the power supply device 11 supplies power to the charging device 13 with the contracted capacity signed with the power transmission and distribution industry.

Step S25 monitors the SOC of the energy storage battery 122 . When the SOC of the energy storage battery 122 is greater than or equal to the second predetermined value, step S23 is executed. In some embodiments, the second predetermined value is greater than or equal to the first predetermined value. For example, the second predetermined value may be 80%, 85%, 90%, 95%, 100% or other values between 80% and 100%.

Since step S25 can stop charging the energy storage battery 122 when the SOC of the energy storage battery 122 is greater than or equal to the second predetermined value, and use the energy storage battery 122 to power the charging device 13 , overcharging of the energy storage battery 122 can be avoided. situation to increase the life and durability of the energy storage battery 122.

When the SOC of the energy storage battery 122 is less than the third predetermined value, step S26 is executed. Step S26 reduces the maximum power supply of the charging device 13 to the load 16 and stops the energy storage battery 122 from powering the charging device 13 . In step S26, the power supply device 11 charges the energy storage battery 122 at a first ratio of the contracted capacity, and supplies power to the charging device 13 at a second ratio of the contracted capacity. In some embodiments, the first ratio may be 0-100%. In some embodiments, the second ratio may be 0-100%. For example, assuming that the contracted capacity is 30kW, the first ratio is 20% and the second ratio is 80%, the power supply device 11 charges the energy storage battery 122 with 6kW and supplies power to the charging device 13 with 24kW power. In this case, since the energy storage battery 122 has stopped supplying power to the charging device 13, the maximum charging power that the charging device 13 can provide to the load 16 is 24kW. In some embodiments, the third predetermined value is smaller than the first predetermined value or the second predetermined value. In some embodiments, the third predetermined value is less than or equal to 20%. For example, the third predetermined value may be 5%, 10%, 15%, 20% or other values between 5% and 20%.

Since step S26 can stop the energy storage battery 122 from continuing to discharge when the SOC of the energy storage battery 122 is less than the third predetermined value, this can avoid excessive discharge of the energy storage battery 122 and increase the life and durability of the energy storage battery 122 .

Step S27 monitors the SOC of the energy storage battery 122 . If the SOC of the energy storage battery 122 is greater than the fourth predetermined value, step S24 is executed. In some embodiments, the fourth predetermined value is greater than the third predetermined value. In some embodiments, the fourth predetermined value is less than or equal to 40%. For example, the third predetermined value may be 15%, 20%, 25%, 30%, 35%, 40% or other values between 15% and 40%.

Returning to step S21, if it is determined that the power consumption peak period occurs, step S28 is executed. Step S28 determines whether the SOC of the energy storage battery 122 is greater than or equal to the fifth predetermined value. In some embodiments, the fifth predetermined value is smaller than the first predetermined value. In some embodiments, the fifth predetermined value is greater than or equal to 60%. For example, the fifth predetermined value may be 60%, 65%, 70%, 75%, 80%, 85% or other values between 60% and 85%.

If it is determined that the SOC of the energy storage battery 122 is greater than or equal to the fifth predetermined value, step S29 is executed. Step S29 controls the energy storage battery 122 to provide power to the charging device 13 . In other words, the electric energy used by the power supply device 13 to charge the load 16 is provided by the energy storage battery 122 . In some embodiments, the maximum charging power that the charging device 13 can provide to the load 16 is related to the maximum power that the energy storage battery 122 can provide. In some embodiments, the maximum charging power that the charging device 13 can provide to the load 16 is approximately equal to the maximum power that the energy storage battery 122 can provide. For example, if the maximum power of the energy storage battery 122 is 120kW, the maximum charging power that the charging device 13 can provide to the load 16 is 120kW. In some embodiments, in step S29, the power supply device 11 does not provide power to the charging device 13.

If it is determined that the SOC of the energy storage battery 122 is less than the fifth predetermined value, step S30 is executed. Step S30 controls the power supply device 11 and/or the energy storage battery 122 to supply power to the charging device 13 , and controls the power supply device 11 to charge the energy storage battery 122 . The maximum charging power that the charging device 13 can provide to the load 16 is related to the maximum power that the energy storage battery 122 can provide. In some embodiments, the maximum charging power that the charging device 13 can provide to the load 16 is approximately equal to the maximum power that the energy storage battery 122 can provide. For example, if the maximum power of the energy storage battery 122 is 120kW, the maximum charging power that the charging device 13 can provide to the load 16 is 120kW. In some embodiments, the power supply device 11 charges the energy storage battery 122 with the contracted capacity signed with the power transmission and distribution industry. For example, if the contract capacity signed with the power transmission and distribution industry is 30kW, the power supply device 11 charges the energy storage battery 122 with a power of 30kW. In some embodiments, the power supply device 11 supplies power to the charging device 13 with the contracted capacity signed with the power transmission and distribution industry.

Step S31 monitors the SOC of the energy storage battery 122 . When the SOC of the energy storage battery 122 is greater than or equal to the sixth predetermined value, step S28 is executed. In some embodiments, the sixth predetermined value is less than the second predetermined value. For example, the sixth predetermined value may be 70%, 75%, 80%, 85%, 90% or other values between 70% and 90%.

Since step S31 can stop charging the energy storage battery 122 when the SOC of the energy storage battery 122 is greater than or equal to the sixth predetermined value, and use the energy storage battery 122 to power the charging device 13, this can avoid overcharging of the energy storage battery 122. situation to increase the life and durability of the energy storage battery 122.

When the SOC of the energy storage battery 122 is less than the seventh predetermined value, step S32 is executed. Step S32 reduces the maximum power supply of the charging device 13 to the load 16 and stops the energy storage battery 122 from powering the charging device 13 . In step S32, the power supply device 11 charges the energy storage battery 122 at a first ratio of the contracted capacity, and supplies power to the charging device 13 at a second ratio of the contracted capacity. In some embodiments, the first ratio may be 0-100%. In some embodiments, the second ratio may be 0-100%. For example, assuming that the contracted capacity is 30kW, the first ratio is 20% and the second ratio is 80%, the power supply device 11 charges the energy storage battery 122 with 6kW and supplies power to the charging device 13 with 24kW power. In this case, since the energy storage battery 122 has stopped supplying power to the charging device 13, the maximum charging power that the charging device 13 can provide to the load 16 is 24kW. In some embodiments, the seventh predetermined value is smaller than the fifth predetermined value or the sixth predetermined value. In some embodiments, the seventh predetermined value is less than or equal to 20%. For example, the seventh predetermined value may be 5%, 10%, 15%, 20% or other values between 5% and 20%.

Since step S32 can stop the energy storage battery 122 from continuing to discharge when the SOC of the energy storage battery 122 is less than the seventh predetermined value, this can avoid excessive discharge of the energy storage battery 122 and increase the life and durability of the energy storage battery 122 .

Step S33 monitors the SOC of the energy storage battery 122 . If the SOC of the energy storage battery 122 is greater than the eighth predetermined value, step S30 is executed. In some embodiments, the eighth predetermined value is greater than the seventh predetermined value. In some embodiments, the eighth predetermined value is less than or equal to 40%. For example, the eighth predetermined value may be 15%, 20%, 25%, 30%, 35%, 40% or other values between 15% and 40%.

In some embodiments, the method or steps shown in Figure 2 may be executed by a joint resource sharing program having a plurality of program instructions (code). The joint resource sharing program is a computer program product that can be stored in a non-transitory computer readable storage medium. When the program instructions are loaded into an electronic device (such as the control system 14 or the server device 15 shown in Figure 1), the computer program executes the method or steps shown in Figure 2.

It will be understood that embodiments of the systems and methods discussed herein are not limited to the details of construction and/or configuration described herein or illustrated in the figures, but may be practiced or carried out in various ways. The specific examples herein are illustrative only and are not intended to be limiting.

Furthermore, the phraseology and terminology used herein are illustrative only and are not intended to be limiting of the invention. The singular or plural forms are illustrative only and are not intended to limit the system or method, its elements, components, or steps of the invention. When used herein, the terms “includes,” “includes,” “has,” “contains,” “involves,” and other similar terms encompass the items listed thereafter, equivalents, and additional items. "Or" and other similar expressions may be deemed to indicate either of the items described.

1: Power management system 11: Power supply device 11a: Transmission lines 12: Energy storage device 13: Charging device 14: Control system 15: Server installation 16: Load 20: Flowchart 111： Electric meter 112: Power adjustment system 121: Power adjustment system 122: Energy storage battery 123: Communication module 131: Power converter 132: Processor 133: Communication module 141: Processor 142: Memory 143: Communication module 151: Processor 152: Memory 153: Communication module S21: Steps S22: Steps S23: Steps S24: Steps S25: Steps S26: Steps S27: Steps S28: Steps S29: Steps S30: Steps S31: Steps S32: Steps S33: Steps

Various aspects of the embodiments are discussed below with reference to the drawings, which are not drawn to scale and are illustrative only and do not limit the scope of the invention. Element symbols used in the drawings and description are for illustration only and do not limit the scope of the present invention. Identical or similar components are represented by the same component symbol, where:

FIG. 1 is a schematic diagram of a power management system according to some embodiments of the present disclosure.

FIG. 2 shows a flow chart of a power management method according to some embodiments of the present disclosure.

(without)

1: Power management system 11: Power supply device 11a: Transmission lines 12: Energy storage device 13: Charging device 14: Control system 15: Server installation 16: Load 111： Electric meter 112: Power adjustment system 121: Power adjustment system 122: Energy storage battery 123: Communication module 131: Power converter 132: Processor 133: Communication module 141: Processor 142: Memory 143: Communication module 151: Processor 152: Memory 153: Communication module

Claims (10)

An electric energy management method, including: determining whether the SOC of an energy storage battery is greater than or equal to a first predetermined value; if the SOC of the energy storage battery is greater than or equal to the first predetermined value, controlling the energy storage battery to provide a first electrical energy Provide a charging device to charge one or more loads, and stop a power supply device from charging the energy storage battery; and if the SOC of the energy storage battery is less than the first predetermined value, control the energy storage battery to provide the The first electric energy is supplied to the charging device to charge one or more loads, and the power supply device starts to charge the energy storage battery, wherein: if the current period is a power consumption peak period, the first predetermined value is 60% ~80%; and if the current period is during a primary ionization peak, the first predetermined value is 80% ~ 100%. The method of claim 1, wherein the maximum charging power provided by the charging device to the one or more loads is equal to the maximum power that the energy storage battery can output. The method of claim 1, further comprising: monitoring the SOC of the energy storage battery; and when the SOC of the energy storage battery is greater than or equal to a second predetermined value, stopping the power supply device from charging the energy storage device . The method described in claim 3, wherein if the current peak period of electricity consumption is, the second predetermined value is 70%~90%; and If the current period belongs to the ionization peak period, the second predetermined value is 80%~100%. The method of claim 3, wherein the maximum charging power provided by the charging device to the one or more loads is equal to the maximum power that the energy storage device can output. The method of claim 3, further comprising: monitoring the SOC of the energy storage battery; and when the SOC of the energy storage battery is less than a third predetermined value, reducing the charge of the charging device to one or more The maximum power of load charging, and stop the energy storage battery from supplying power to the charging device. The method of claim 6, further comprising: controlling the power supply device to power the charging device with a first ratio of a second electrical energy; and controlling the power supply device to power a second ratio of the second electrical energy to the charging device. Energy storage battery charging. The method described in claim 6, wherein the third predetermined value is 10%~20%. The method of claim 6 further includes controlling the energy storage battery to provide the first electrical energy to the charging device when it is determined that the SOC of the energy storage battery is greater than a fourth predetermined value. The method described in claim 9, wherein the fourth predetermined value is 30%~50%.

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