CN115189437B

CN115189437B - Control method of power supply system and battery management system

Info

Publication number: CN115189437B
Application number: CN202210795443.9A
Authority: CN
Inventors: 李晓斌; 李代程
Original assignee: Beijing Baidu Netcom Science and Technology Co Ltd
Current assignee: Beijing Baidu Netcom Science and Technology Co Ltd
Priority date: 2022-07-07
Filing date: 2022-07-07
Publication date: 2023-09-12
Anticipated expiration: 2042-07-07
Also published as: CN115189437A

Abstract

The disclosure provides a control method of a power supply system and a battery management system, relates to the technical field of computers, and particularly relates to the fields of data processing, battery energy storage and the like. The specific implementation scheme is as follows: the method comprises the steps of obtaining an energy storage discharging state, a current time and a full charge state of a battery, obtaining a preset discharging period and a preset charging period, and adjusting output voltage of a direct current bus according to the energy storage discharging state, the current time, the full charge state, the discharging period and the charging period to control the charging and discharging states of a power supply system, wherein the charging and discharging states of the power supply system comprise a battery charging state, a battery energy storage discharging state and a normal discharging state. According to the method, the output voltage of the direct current bus is regulated according to the obtained energy storage discharging state, the current time, the full charge state and the discharging and charging time period, so that the control of the charging and discharging state of the power supply system is realized, the control method is simple and reliable, the difficulty of grounding or transformation is reduced, the functions of integrating energy storage and power backup are realized, and the economic benefit is improved.

Description

Control method of power supply system and battery management system

Technical Field

The disclosure relates to the fields of data processing, battery energy storage and the like in the technical field of computers, and in particular relates to a control method of a power supply system and a battery management system.

Background

At present, some data centers adopt a centralized energy storage scheme to configure UPS (alternating current uninterruptible power supply)/HVDC (direct current uninterruptible power supply) +battery as a standby power supply, but the standby power is mainly used.

However, the centralized energy storage scheme and the control method are complex and unreliable, are difficult to land or reform in projects, cannot realize the function of integrating energy storage and power backup, and have low economic benefit.

Disclosure of Invention

The disclosure provides a control method of a power supply system and a battery management system.

According to a first aspect, there is provided a control method of a power supply system, comprising: acquiring an energy storage and discharge state, current time and a full charge state of a battery; acquiring a preset discharging period and a preset charging period; and regulating the output voltage of the direct current bus according to the energy storage discharging state, the current time, the full charge state, the discharging period and the charging period so as to realize the control of the charging and discharging states of the power supply system, wherein the charging and discharging states of the power supply system comprise a battery charging state, a battery energy storage discharging state and a normal discharging state.

According to a second aspect, there is provided a battery management system comprising: the first end of the current sensor is connected with the positive electrode of the battery; the anode of the diode is connected with the second end of the current sensor, and the cathode of the diode is connected with the first end of the first switch in the circuit breaker; a contactor connected in parallel with the diode; the circuit breaker comprises a first switch and a second switch which are in linkage, wherein the second end of the first switch is connected with the positive electrode of the direct current bus, the first end of the second switch is connected with the negative electrode of the battery, and the second end of the second switch is connected with the negative electrode of the direct current bus; the battery management module is respectively connected with the current sensor, the contactor, the circuit breaker, the battery and the uninterrupted power supply; the battery management module is used for acquiring the discharge current acquired by the current sensor and the capacity of the battery, generating an energy storage discharge state and a full charge state of the battery according to the capacity of the battery, controlling the contactor and the breaker to act according to the discharge current, the capacity of the battery and the full charge state, and sending the energy storage discharge state and the full charge state to the uninterruptible power supply so that the uninterruptible power supply can adjust the output voltage of the direct current bus according to the energy storage discharge state and the full charge state to control the charge and discharge state of the power supply system, wherein the charge and discharge state of the power supply system comprises a battery charge state, a battery energy storage discharge state and a normal discharge state.

According to a third aspect, there is provided a control method of a power supply system, comprising: acquiring discharge current acquired by a current sensor; acquiring the capacity of a battery; generating a full state of the battery according to the capacity of the battery; and controlling the action of the contactor according to the discharging current and the full state so as to control the charging and discharging states of the battery, wherein the charging and discharging states of the battery comprise a battery charging state, a battery discharging state and a battery standby state.

According to a fourth aspect, there is provided a control device of a power supply system, comprising: the first acquisition module is used for acquiring the energy storage and discharge state of the battery, the current time and the full state of the battery; the second acquisition module is used for acquiring a preset discharging period and a preset charging period; the adjusting module is used for adjusting the output voltage of the direct current bus according to the energy storage discharging state, the current time, the full state, the discharging period and the charging period so as to control the charging and discharging states of the power supply system, wherein the charging and discharging states of the power supply system comprise a battery charging state, a battery energy storage discharging state and a normal discharging state.

According to a fifth aspect, there is provided a control device of a power supply system including the battery management system according to the second aspect of the present disclosure, the control device comprising: the third acquisition module is used for acquiring the discharge current acquired by the current sensor; a fourth acquisition module for acquiring the capacity of the battery; a generation module for generating a full state of the battery according to the capacity of the battery; and the control module is used for controlling the action of the contactor according to the discharging current and the full state so as to control the charging and discharging states of the battery, wherein the charging and discharging states of the battery comprise a battery charging state, a battery discharging state and a battery standby state.

According to a sixth aspect, there is provided an electronic device comprising: at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method of controlling the power supply system according to the first aspect of the present disclosure or the method of controlling the power supply system according to the third aspect of the present disclosure.

According to a seventh aspect, there is provided a non-transitory computer-readable storage medium storing computer instructions for causing the computer to execute the control method of the power supply system according to the first aspect of the present disclosure or the control method of the power supply system according to the third aspect of the present disclosure.

According to an eighth aspect, there is provided a computer program product comprising a computer program which, when executed by a processor, implements the steps of the method of controlling a power supply system according to the first aspect of the present disclosure or the steps of the method of controlling a power supply system according to the third aspect of the present disclosure.

It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the disclosure, nor is it intended to be used to limit the scope of the disclosure. Other features of the present disclosure will become apparent from the following specification.

Drawings

The drawings are for a better understanding of the present solution and are not to be construed as limiting the present disclosure. Wherein:

fig. 1 is a flow chart of a control method of a power supply system according to a first embodiment of the present disclosure;

FIG. 2 is a schematic diagram of a peak-valley spread period law in a certain region;

Fig. 3 is a flow chart of a control method of a power supply system according to a second embodiment of the present disclosure;

fig. 4 is a flow chart of a control method of a power supply system according to a third embodiment of the present disclosure;

FIG. 5 is a schematic diagram of controlling the charge and discharge states of a power supply system;

fig. 6 is a block diagram of a battery management system according to a first embodiment of the present disclosure;

fig. 7 is a flow chart of a control method of a power supply system according to a fourth embodiment of the present disclosure;

FIG. 8 is a schematic diagram of the control of contactor operation;

fig. 9 is a block diagram of a control device of a power supply system according to a first embodiment of the present disclosure;

fig. 10 is a block diagram of a control device of a power supply system according to a second embodiment of the present disclosure;

fig. 11 is a block diagram of a control device of a power supply system according to a third embodiment of the present disclosure;

fig. 12 is a block diagram of an electronic device used to implement a control method of a power supply system of an embodiment of the present disclosure.

Detailed Description

Exemplary embodiments of the present disclosure are described below in conjunction with the accompanying drawings, which include various details of the embodiments of the present disclosure to facilitate understanding, and should be considered as merely exemplary. Accordingly, one of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the present disclosure. Also, descriptions of well-known functions and constructions are omitted in the following description for clarity and conciseness.

Computer technology (Computer Technology, CT for short) refers to technical methods and means applied in the computer field, or refers to hardware technology, software technology and application technology thereof. The computer technology has obvious comprehensive characteristics, and is tightly combined with electronic engineering, application physics, mechanical engineering, modern communication technology, mathematics and the like, and the development is rapid.

Data Processing (DP) is the collection, storage, retrieval, processing, transformation, and transmission of Data. The basic purpose of data processing is to extract and derive data that is valuable and meaningful to some particular person from a large, possibly unorganized, unintelligible, data. Data processing is a fundamental link of system engineering and automatic control. Data processing extends throughout various areas of social production and social life. The development of data processing technology and the breadth and depth of application thereof greatly influence the progress of human society development.

Battery energy storage refers to a series of related technologies that achieve storage of electric energy by physical or chemical methods, and release when needed. The stored energy can be used as emergency energy, can also be used for storing energy when the load of the power grid is low, and can be used for outputting energy when the load of the power grid is high, so as to cut peaks and fill valleys and lighten the fluctuation of the power grid.

Control methods, devices, systems, terminals, electronic devices and media of the power supply system according to embodiments of the present disclosure are described below with reference to the accompanying drawings.

Fig. 1 is a flow chart of a control method of a power supply system according to a first embodiment of the present disclosure.

The execution main body of the control method of the power supply system in the embodiment of the present disclosure may specifically be UPS or HVDC, as shown in fig. 1, and the control method of the power supply system in the embodiment of the present disclosure may specifically include the following steps:

s101, acquiring an energy storage and discharge state of the battery, current time and a full charge state of the battery.

Alternatively, the execution body of the control method of the power supply system according to the embodiment of the present disclosure may be the control device of the power supply system provided by the embodiment of the present disclosure, and the control device of the power supply system may be a hardware device having a data information processing capability and/or software necessary for driving the hardware device to operate. Alternatively, the execution body may include a workstation, a server, a computer, a user terminal, and other devices. The user terminal comprises, but is not limited to, a mobile phone, a computer, intelligent voice interaction equipment, intelligent household appliances, vehicle-mounted terminals and the like.

It will be appreciated by those skilled in the art that a data center is the core area for information integration and typically carries significant storage or computing resources, so that the data center must be adequately powered, typically with UPS/HVDC + lead acid storage batteries configured as backup power for the data center server. At present, the peak-valley difference of the electric power in each place is larger and larger, and energy storage is built through a data center, so that on one hand, peak-valley cutting and filling can be performed by matching with a power grid, the peak power supply of the power grid is indirectly reduced, the carbon emission of the power generation side and the power grid side is reduced, and on the other hand, economic benefits can be directly obtained through the peak-valley electricity price difference.

In the related art, the energy storage scheme is mainly a centralized energy storage scheme, namely, one data center only has one energy storage system, and normally, the data center can be configured with a UPS/HVDC+battery as a backup power supply of a data center server to be used as backup power, wherein the battery is generally used only as backup power, and the backup power time is generally 10-30min. However, the area occupied by the centralized energy storage is large, the centralized energy storage is difficult to land or reform in the project, the batteries of the UPS and the HVDC are only used for standby power, the function of integrating the energy storage and the standby power cannot be realized even if the battery configuration is increased without reforming a control method, and in addition, some UPS and HVDC are complicated and unreliable as a scheme for standby power and energy storage or a control method, and the economic benefit is not high.

In order to solve the above-mentioned problems, the present disclosure proposes a control method of a power supply system, where the energy storage and power backup scheme is a distributed scheme, that is, a data center is composed of multiple distributed sets of energy storage and power backup electronic systems, each set of subsystem is configured with a configured UPS or HVDC, and the subsystems are mutually decoupled. The control method is simple and reliable, reduces the difficulty of landing or reconstruction, realizes the function of integrating energy storage and power backup, and improves the economic benefit.

Specifically, the energy storage and discharge state refers to specific state information of energy storage and discharge of the battery, the current time is real-time obtained by automatic detection of the uninterruptible power supply, the full state refers to state information when the electric quantity of the battery is full, and the energy storage and discharge state, the current time and the full state of the battery are obtained for subsequent processing. It should be noted that, when the HVDC and UPS of the present disclosure adopt the original scheme and are used as the application of integrating energy storage and power backup, the control methods of the HVDC and UPS are similar, the present disclosure will be described below by taking HVDC as an example only, and at this time, the current time is the real-time of automatic detection and acquisition of the HVDC

It should be noted that, the energy storage and discharge state of the battery may be represented and judged by a flag bit. For example, K is a flag bit of the energy storage and discharge State of the battery, when k=1, it indicates that the battery capacity (State of Charge, SOC) is greater than the capacity corresponding to the standby time, where the battery capacity is detected in real time by the system and converted correspondingly, and the standby time of the battery and the battery capacity have a corresponding relationship, for example, if the battery needs to be standby for 15 minutes, the battery capacity corresponding to 15 minutes is 15%, and the condition that SOC > 15% needs to be satisfied to perform energy storage and discharge of the battery; when k=0, this is a default value of the energy storage and discharge state of the battery, which means that the battery capacity is smaller than the capacity corresponding to the standby time, for example, if the battery needs to be standby for 15 minutes, the battery capacity corresponding to 15 minutes is 15%, and when the condition that SOC is less than or equal to 15% is satisfied, the energy storage and discharge of the battery cannot be performed, and this value is set to ensure the reliability of the standby, because this value is a default value, even if the communication is wrong, this value is default to 0, that is, the energy storage and discharge of the battery cannot be performed.

Note that, the full state of the battery may be represented and judged by a flag bit. For example, M is a flag bit of the full state of the battery, when m=1, it indicates that the battery capacity is not full, i.e., SOC < 100%, at which time the battery can be charged; when m=0, this is a default value of the full state of the battery, indicating that the battery capacity is full, i.e., soc=100%, at which time the battery cannot be charged.

S102, acquiring a preset discharging period and a preset charging period.

Specifically, the discharging period is a period in which a preset battery is discharged, the charging period is a period in which a preset battery is charged, and the preset discharging period and the charging period are acquired for subsequent processing. It should be noted that the discharge period and the charge period may be repeated, that is, the battery is simultaneously discharged and charged when the discharge period and the charge period are repeated.

For energy storage applications, HVDC needs to be controlled correspondingly according to peak-valley flat electricity price periods of each place, and the electricity price periods can comprise peak sections, valley sections, flat sections and the like. In order to better control the power supply system, different time periods can be distinguished through the zone bit, the zone bit corresponding time period can be preset in the HVDC, then the HVDC correspondingly converts the zone bit according to the clock in real time, the zone bit is only used as internal control and is not externally transmitted, in addition, the different time periods can be distinguished in other condition modes, the disclosure is not repeated, and only the different time periods can be distinguished, and the following 2 zone bits are used for distinguishing the different time periods.

For example, the 2 flag bits may be a charging period flag bit C and a discharging period flag bit D, where the values of C and D may be 1 and 0, where c=1 represents a charging period, c=0 represents a non-charging period, which is a default value, i.e., charging may not be performed by default, d=1 represents a discharging period, and d=0 represents a non-discharging period, which is a default value, i.e., discharging may not be performed by default. As shown in fig. 2 below, fig. 2 is a schematic diagram of peak-valley difference period rules of a certain region, including t1, t2, t3, t4, and t5, etc., if charging is required in the t1 and t3 segments, discharging is required in the t2 and t4 segments, and neither charging nor discharging is required in the t5 segment, the flag bit may be set as shown in fig. 2.

And S103, regulating the output voltage of the direct current bus according to the energy storage discharging state, the current time, the full state, the discharging period and the charging period so as to realize the control of the charging and discharging states of the power supply system.

Specifically, the output voltage of the dc bus is adjusted according to the energy storage and discharge state of the battery, the current time, the full charge state of the battery, and the preset discharge period and the preset charge period acquired in step S102, so as to control the charge and discharge state of the power supply system. It should be noted that, the charging and discharging states of the power supply system include a battery charging state, a battery energy storage and discharging state and a normal discharging state, and the power supply is in a normal state for power failure, recovery of the mains supply, and discharging of the battery, and the like, and the power supply system is performed according to normal logic, so that special control is not required, and the disclosure is omitted.

In summary, according to the control method of the power supply system in the embodiment of the disclosure, the energy storage and discharge state, the current time and the full charge state of the battery are obtained, the preset discharge period and the preset charge period are obtained, and the output voltage of the direct current bus is regulated according to the energy storage and discharge state, the current time, the full charge state, the discharge period and the charge period, so that the control of the charge and discharge state of the power supply system is realized. According to the control method of the power supply system, the control of the charging and discharging state of the power supply system is achieved by adjusting the output voltage of the direct current bus according to the obtained energy storage and discharging state, the current time, the full charge state of the battery, the preset discharging period and the charging period, the control method is simpler and more reliable, the difficulty of landing or transformation in projects is reduced, the function of integrating energy storage and standby electricity is achieved, and economic benefits are improved while standby electricity is guaranteed.

Fig. 3 is a flow chart of a control method of a power supply system according to a second embodiment of the present disclosure.

As shown in fig. 3, on the basis of the embodiment shown in fig. 1, the control method of the power supply system according to the embodiment of the disclosure may specifically include the following steps:

s301, acquiring an energy storage and discharge state of the battery, current time and a full charge state of the battery.

Alternatively, the energy storage discharge state may be obtained from a battery management system (Battery Management System, BMS).

Alternatively, the full state may be obtained from the battery management system.

S302, a preset discharging period and a preset charging period are obtained.

It should be noted that, steps S301 to S302 in this embodiment are the same as steps S101 to S102 in the above embodiment, and will not be described here again.

Step S103 "in the above embodiment, adjusting the output voltage of the dc bus according to the energy storage discharging state, the current time, the full state, the discharging period and the charging period to realize the control of the charging and discharging state of the power supply system" may specifically include the following steps S303 to S304:

and S303, in response to the energy storage discharging state being the non-energy storage discharging state, dynamically adjusting the output voltage of the direct current bus so as to control the charging and discharging state of the power supply system to be in the battery charging state.

Specifically, the energy storage and discharge state can include non-energy storage and discharge, the energy storage and discharge state is judged, and if the energy storage and discharge state is non-energy storage and discharge, the output voltage of the direct current bus is dynamically regulated so as to control the charge and discharge state of the power supply system to be in the battery charge state.

At this time, the HVDC charges the battery and simultaneously discharges the load, and the corresponding change of the charging voltage and charging current is performed according to the charging requirement of the battery set in advance, so that the battery is fully charged, and this state only occurs when the battery does not satisfy the standby time and when the energy storage charging period is performed (k=0 and c=1 and d=0 and m=1).

And S304, in response to the energy storage discharging state being energy storage discharging and the current time being a discharging period, adjusting the voltage of the direct current bus to be a preset energy storage discharging voltage so as to control the charging and discharging state of the power supply system to be in a battery energy storage discharging state.

Specifically, the energy storage and discharge state can include energy storage and discharge, the energy storage and discharge state and the current time are judged, and if the energy storage and discharge state is energy storage and discharge, and the current time is a discharge period, the output voltage of the direct current bus is regulated so as to control the charge and discharge state of the power supply system to be in the battery energy storage and discharge state.

At this time, the HVDC stops supplying power to the load, and the dc bus voltage is reduced to a preset energy storage discharge voltage. For example 200V, it is possible to ensure that the battery energy storage discharge state is performed while ensuring that if the battery energy storage discharge state is stopped, the HVDC output voltage, for example 200V as described above, also satisfies the operating voltage of the load, this state only occurs when the battery satisfies the standby time and is for the energy storage discharge period, i.e. k=1 and d=1.

In summary, the control method of the power supply system according to the embodiment of the present disclosure obtains an energy storage discharge state of a battery, a current time and a full charge state of the battery, obtains a preset discharge period and a preset charge period, dynamically adjusts a dc bus output voltage to control the charge and discharge state of the power supply system to be in the battery charge state in response to the energy storage discharge state being non-energy storage discharge, and adjusts the dc bus voltage to be the preset energy storage discharge voltage to control the charge and discharge state of the power supply system to be in the battery energy storage discharge state in response to the energy storage discharge state being energy storage discharge. According to the control method of the power supply system, the control of the charging and discharging state of the power supply system is achieved by adjusting the output voltage of the direct current bus according to the obtained energy storage and discharging state, the current time, the full charge state of the battery, the preset discharging period and the charging period, the control method is simpler and more reliable, the difficulty of landing or transformation in projects is reduced, the function of integrating energy storage and standby electricity is achieved, and economic benefits are improved while standby electricity is guaranteed. Meanwhile, the output voltage of the direct current bus is regulated according to the energy storage discharging state, the current time, the full state, the discharging period and the charging period, so that the control of the charging and discharging states of the power supply system is further realized.

Fig. 4 is a flowchart of a control method of a power supply system according to a third embodiment of the present disclosure.

As shown in fig. 4, on the basis of the embodiment shown in fig. 1, the control method of the power supply system according to the embodiment of the disclosure may specifically include the following steps:

s401, acquiring an energy storage discharging state, current time and a full charge state of the battery.

S402, acquiring a preset discharging period and a preset charging period.

It should be noted that, steps S401 to S402 in this embodiment are the same as steps S101 to S202 in the above embodiment, and are not described here again.

Step S103 "according to the energy storage discharging state, the current time, the full state, the discharging period and the charging period, the dc bus output voltage is adjusted to realize the control of the charging and discharging states of the power supply system" in the above embodiment further includes the following steps:

s403, in response to the energy storage discharging state being the energy storage discharging, the current time being the non-discharging period, the full state being the non-full state, and the current time being the charging period, the DC bus output voltage is dynamically adjusted to control the charging and discharging state of the power supply system to be in the battery charging state.

Specifically, if the energy storage and discharge state is the energy storage and discharge state, the current time is the non-discharge period, the full state is the unfilled state, and the current time is the charging period, the output voltage of the direct current bus is regulated so as to control the charging and discharging state of the power supply system to be in the battery charging state. When k=1 and d=0 and m=1 and c=1, the dc bus output voltage is adjusted to control the charging and discharging states of the power supply system to be in the battery charging state.

And S404, in response to the energy storage discharging state being the energy storage discharging, the current time being a non-discharging period, the full state being the non-full state, and the current time being the non-charging period, adjusting the DC bus voltage to be a preset normal discharging voltage so as to control the charging and discharging states of the power supply system to be in the normal discharging state.

Specifically, if the energy storage discharge state is the energy storage discharge, the current time is the non-discharge period, the full state is the non-full state, and the current time is the non-charge period, the output voltage of the direct current bus is regulated so as to control the charge and discharge state of the power supply system to be in the normal discharge state.

When k=1 and d=0 and m=1 and c=0, the load is discharged at this time, and the battery does not discharge the energy storage. At this time, the dc bus voltage is adjusted to a normal voltage value (for example, 270V), and the standby voltage of the battery is lower than 270V, so that the battery is in a standby state, i.e., a normal discharge state, in which only HVDC is used for discharging. The battery has three states of standby, charging and discharging, and the standby state of the battery is that the battery is in a state of no charging and no discharging.

Otherwise, corresponding control work is performed according to the schematic diagram shown in the following fig. 5, so as to ensure that the system operates normally and stably. The power failure of the commercial power also comprises the conditions of abnormal commercial power and the like, at the moment, the battery is directly discharged, no matter how much capacity and electric quantity remain in the battery, the battery is required to be discharged, any control is not needed, and the market recovery means that after the commercial power voltage is normal, the HVDC is usually restarted, and then the conventional control is continued.

In summary, the control method of the power supply system according to the embodiment of the disclosure obtains an energy storage discharge state of the battery, a current time and a full charge state of the battery, and in response to the energy storage discharge state being energy storage discharge, the current time being a non-discharge period, the full charge state being not full, and the current time being a charge period, dynamically adjusts the dc bus output voltage to control the power supply system charge-discharge state to be in the battery charge state, and in response to the energy storage discharge state being energy storage discharge, the current time being a non-discharge period, the full charge state being not full, and the current time being a non-charge period, adjusts the dc bus voltage to be a preset normal discharge voltage to control the power supply system charge-discharge state to be in the normal discharge state. According to the control method of the power supply system, the control of the charging and discharging state of the power supply system is achieved by adjusting the output voltage of the direct current bus according to the obtained energy storage and discharging state, the current time, the full charge state of the battery, the preset discharging period and the charging period, the control method is simpler and more reliable, the difficulty of landing or transformation in projects is reduced, the function of integrating energy storage and standby electricity is achieved, and economic benefits are improved while standby electricity is guaranteed. Meanwhile, the output voltage of the direct current bus is regulated according to the energy storage discharging state, the current time, the full state, the discharging period and the charging period, so that the control of the charging and discharging states of the power supply system is further realized.

Fig. 6 is a block diagram of a battery management system according to a first embodiment of the present disclosure. As shown in fig. 6, a battery management system 600 according to an embodiment of the present disclosure may specifically include: a current sensor 601, a diode 602, a contactor 603, a circuit breaker 604, and a battery management module 605. Wherein, the liquid crystal display device comprises a liquid crystal display device,

wherein a first end of the current sensor 601 is connected to the positive electrode of the battery.

An anode of the diode 602 is connected to the second terminal of the current sensor 601, and a cathode of the diode is connected to the first terminal of the first switch in the circuit breaker 604.

The contactor 603 is connected in parallel with the diode 602.

The circuit breaker 604 includes a first switch and a second switch that are linked, the second end of the first switch is connected with the positive pole of the dc bus, the first end of the second switch is connected with the negative pole of the battery, and the second end of the second switch is connected with the negative pole of the dc bus.

The battery management module 606 is connected to the current sensor 601, the contactor 603, the circuit breaker 604, the battery, and the uninterruptible power supply, respectively. It should be noted that, the battery management module 605 is a control center of the battery management system 600. Alternatively, the battery management module may be a motherboard of the battery management system.

Further, the battery management module 605 is configured to obtain the discharge current collected by the current sensor 601 and the capacity of the battery, generate an energy storage discharge state and a full charge state of the battery according to the capacity of the battery, control the contactor 603 and the breaker 604 to act according to the discharge current, the capacity of the battery and the full charge state, and send the energy storage discharge state and the full charge state to the uninterruptible power supply, so that the uninterruptible power supply can adjust the output voltage of the dc bus according to the energy storage discharge state and the full charge state, thereby realizing control over the charge and discharge state of the power supply system, wherein the charge and discharge state of the power supply system includes a battery charge state, a battery energy storage discharge state and a normal discharge state.

The battery management module 605 uses a simple communication protocol such as a dry contact for external communication, ensures the reliability of the battery in communication with UPS and HVDC, and ensures reliable operation of the system even if signals fail without mutual control. In order to realize the function of integrating standby electricity and energy storage, the above 2 zone bit information is needed, and the information is the only information needed to be communicated between the battery and the UPS/HVDC.

In summary, in the battery management system according to the embodiment of the disclosure, the battery management module 605 sends the energy storage discharging state and the full state to the uninterruptible power supply, so that the uninterruptible power supply can adjust the output voltage of the direct current bus according to the energy storage discharging state and the full state, thereby realizing the control of the charging and discharging states of the power supply system.

Fig. 7 is a flowchart of a control method of a power supply system according to a fourth embodiment of the present disclosure. The execution main body of the control method of the power supply system in the embodiment of the disclosure is a BMS motherboard, and the power supply system includes a battery management system according to the first embodiment of the disclosure, as shown in fig. 7, and the control method of the power supply system in the embodiment of the disclosure may specifically include the following steps:

s701, acquiring discharge current acquired by a current sensor.

Specifically, the discharge current collected by the current sensor is obtained for subsequent processing.

S702, acquiring the capacity of the battery.

S703, generating a full state of the battery according to the capacity of the battery.

Specifically, a full state of the battery is generated according to the capacity of the battery acquired in step S702,

and S704, controlling the action of the contactor according to the discharging current and the full state so as to control the charging and discharging state of the battery.

Specifically, the battery charging and discharging states include a battery charging state, a battery discharging state and a battery standby state, and the contactor is controlled to act according to the discharging current acquired by the current sensor in step S701 and the full state of the battery generated in step S703, so as to control the battery charging and discharging states.

As one possible implementation, in response to the discharge current exceeding a preset discharge current threshold, the contactor is controlled to close to control the battery charge-discharge state to be in the battery discharge state. For example, the preset discharge current threshold may be 10A, and when the discharge current is greater than 10A, the contactor is controlled to be closed, as shown in fig. 8. It should be noted that, when the discharge current exceeds the preset discharge current threshold, the indicating circuit is discharging through the diode,

As one possible implementation, in response to the discharge current not exceeding a preset discharge current threshold, the contactor is controlled to close to control the battery charge-discharge state to be in the battery charge state. For example, when the preset discharge current threshold is 10A, when the discharge current is not greater than 10A, the contactor is controlled to be closed, as shown in fig. 8. It should be noted that, when the BMS motherboard detects that the battery needs to be charged, i.e., m=1, after the battery is full, i.e., soc=100%, the contactor is controlled to be opened, the battery enters a standby state, then the contactor is closed to discharge, if the contactor is not closed due to a failure of the contactor or a signal failure, the contactor can also discharge for a long time through the diode, so as to ensure the reliability of the standby discharge, but there is a partial loss, when the battery is empty, i.e., soc=0%, the circuit breaker is opened, as understood by those skilled in the art, in the application of integrating energy storage and standby, the battery is basically not empty, so that, when the battery is not required to be discharged due to the HVDC control, the current at this time is less than 10A, and the battery enters the charging or standby state according to the corresponding situation.

As one possible implementation, in response to the discharge current not exceeding the preset discharge current threshold and the full state being full, the contactor is controlled to open to control the battery charge-discharge state to be in the battery standby state. For example, when the preset discharge current threshold is 10A, when the discharge current is not greater than 10A and m=0, the contactor is controlled to be opened as shown in fig. 8. The contactor is opened when the battery is standby, and the battery can be turned on only by the diode.

It should be noted that the explanation of the embodiment of the control method of the power supply system is also applicable to the control method of the power supply system in the embodiment of the disclosure, and the specific process is not repeated here.

In summary, according to the control method of the power supply system of the embodiment of the disclosure, the discharging current collected by the current sensor is obtained, the capacity of the battery is obtained, the full state of the battery is generated according to the capacity of the battery, and the action of the contactor is controlled according to the discharging current and the full state, so that the control of the charging and discharging states of the battery is realized. According to the control method of the power supply system, the control of the charging and discharging states of the battery is achieved by controlling the actions of the contactor according to the discharging current and the full state.

Fig. 9 is a block diagram of a control device of a power supply system according to a first embodiment of the present disclosure.

As shown in fig. 9, a control device 900 of a power supply system according to an embodiment of the present disclosure includes: a first acquisition module 901, a second acquisition module 902, and an adjustment module 903.

The first obtaining module 901 is configured to obtain an energy storage and discharge state of the battery, a current time, and a full state of the battery;

a second obtaining module 902, configured to obtain a preset discharging period and a preset charging period;

The adjusting module 903 is configured to adjust the dc bus output voltage according to the energy storage discharging state, the current time, the full charge state, the discharging period, and the charging period, so as to control the charging and discharging states of the power supply system, where the charging and discharging states of the power supply system include a battery charging state, a battery energy storage discharging state, and a normal discharging state.

It should be noted that the explanation of the embodiment of the control method of the power supply system is also applicable to the control device of the power supply system in the embodiment of the disclosure, and the specific process is not repeated here.

In summary, the control device of the power supply system according to the embodiment of the disclosure obtains an energy storage discharge state, a current time and a full charge state of the battery, obtains a preset discharge period and a preset charge period, and adjusts the output voltage of the direct current bus according to the energy storage discharge state, the current time, the full charge state, the discharge period and the charge period to control the charge and discharge states of the power supply system. According to the control device of the power supply system, the DC bus output voltage is regulated according to the obtained energy storage discharging state, the current time, the full state of the battery, the preset discharging period and the charging period, so that the control of the charging and discharging state of the power supply system is realized, the control method is simpler and more reliable, the difficulty of landing or transformation in projects is reduced, the function of integrating energy storage and standby power is realized, and the economic benefit is improved while the standby power is ensured.

Fig. 10 is a block diagram of a control device of a power supply system according to a second embodiment of the present disclosure.

As shown in fig. 10, a control device 1000 of a power supply system according to an embodiment of the present disclosure includes: a first acquisition module 1001, a second acquisition module 1002 and an adjustment module 1003.

The first obtaining module 1001 has the same structure and function as the first obtaining module 901 in the previous embodiment, the second obtaining module 1002 has the same structure and function as the second obtaining module 902 in the previous embodiment, and the adjusting module 1003 has the same structure and function as the adjusting module 903 in the previous embodiment.

Further, the adjustment module 1003 includes: the first adjusting unit 10031 is configured to dynamically adjust the dc bus output voltage in response to the energy storage discharging state being non-energy storage discharging, so as to control the charging and discharging state of the power supply system to be in the battery charging state; the second adjusting unit 10032 is configured to adjust the dc bus voltage to a preset energy storage and discharge voltage in response to the energy storage and discharge state being energy storage and discharge, and the current time being a discharge period, so as to control the charging and discharging state of the power supply system to be in the battery energy storage and discharge state.

10, the adjustment module 1003 includes: the third adjusting unit is used for responding to the fact that the energy storage discharging state is energy storage discharging, the current time is not a discharging period, the full state is not full, and the current time is a charging period, and dynamically adjusting the output voltage of the direct current bus so as to control the charging and discharging states of the power supply system to be in a battery charging state; and the fourth adjusting unit is used for responding to the fact that the energy storage discharging state is energy storage discharging, the current time is not a discharging period, the full state is not full, and the current time is not a charging period, and adjusting the voltage of the direct current bus to be a preset normal discharging voltage so as to control the charging and discharging states of the power supply system to be in the normal discharging state.

10, the first obtaining module 1001 includes: a first acquisition unit configured to acquire an energy storage discharge state from a battery management system; the first acquisition module 1001 includes: and a second acquisition unit configured to acquire a full state from the battery management system.

In summary, the control device of the power supply system according to the embodiment of the disclosure obtains an energy storage discharge state, a current time and a full charge state of the battery, obtains a preset discharge period and a preset charge period, and adjusts the output voltage of the direct current bus according to the energy storage discharge state, the current time, the full charge state, the discharge period and the charge period to control the charge and discharge state of the power supply system, where the charge and discharge state of the power supply system includes a battery charge state, a battery energy storage discharge state and a normal discharge state. According to the control device of the power supply system, the DC bus output voltage is regulated according to the obtained energy storage discharging state, the current time, the full state of the battery, the preset discharging period and the charging period, so that the control of the charging and discharging state of the power supply system is realized, the control method is simpler and more reliable, the difficulty of landing or transformation in projects is reduced, the function of integrating energy storage and standby power is realized, and the economic benefit is improved while the standby power is ensured. Meanwhile, the output voltage of the direct current bus is regulated according to the energy storage discharging state, the current time, the full state, the discharging period and the charging period, so that the control of the charging and discharging states of the power supply system is further realized.

Fig. 11 is a block diagram of a control device of a power supply system according to a third embodiment of the present disclosure.

As shown in fig. 11, a control device 1100 of a power supply system according to an embodiment of the present disclosure includes: a third acquisition module 1101, a fourth acquisition module 1102, a generation module 1103 and a control module 1104.

The third acquisition module 1101 is configured to acquire a discharge current acquired by the current sensor.

A fourth obtaining module 1102 is configured to obtain a capacity of the battery.

The generating module 1103 is configured to generate a full state of the battery according to the capacity of the battery.

The control module 1104 is configured to control the contactor to operate according to the discharging current and the full state, so as to control the battery charging and discharging states, including a battery charging state, a battery discharging state and a battery standby state.

Further, the control module 1104 includes: and the first control unit is used for controlling the contactor to be closed in response to the fact that the discharge current exceeds a preset discharge current threshold value so as to control the battery charge and discharge state to be in the battery discharge state.

Further, the control module 1104 includes: the second control unit is used for controlling the contactor to be closed so as to control the battery charge and discharge state to be in the battery charge state in response to the fact that the discharge current does not exceed a preset discharge current threshold value and the full state is not full; and the third control unit is used for controlling the contactor to be disconnected to control the battery charge and discharge state to be in the battery standby state in response to the fact that the discharge current does not exceed the preset discharge current threshold value and the full state is full.

In summary, the control device of the power supply system according to the embodiment of the present disclosure obtains the discharge current collected by the current sensor, obtains the capacity of the battery, generates the full state of the battery according to the capacity of the battery, and controls the contactor to operate according to the discharge current and the full state, so as to control the charge and discharge states of the battery. According to the control device of the power supply system, the contactor is controlled to act according to the discharging current and the full state, so that the battery charging and discharging state is controlled.

In the technical scheme of the disclosure, the related processes of collecting, storing, using, processing, transmitting, providing, disclosing and the like of the personal information of the user accord with the regulations of related laws and regulations, and the public order colloquial is not violated.

According to embodiments of the present disclosure, the present disclosure also provides an electronic device, a readable storage medium and a computer program product.

Fig. 12 shows a schematic block diagram of an example electronic device 1200 that can be used to implement embodiments of the present disclosure. Electronic devices are intended to represent various forms of digital computers, such as laptops, desktops, workstations, personal digital assistants, servers, blade servers, mainframes, and other appropriate computers. The electronic device may also represent various forms of mobile devices, such as personal digital processing, cellular telephones, smartphones, wearable devices, and other similar computing devices. The components shown herein, their connections and relationships, and their functions, are meant to be exemplary only, and are not meant to limit implementations of the disclosure described and/or claimed herein.

As shown in fig. 12, the electronic device 1200 includes a computing unit 1201 that can perform various appropriate actions and processes according to a computer program stored in a Read Only Memory (ROM) 1202 or a computer program loaded from a storage unit 1208 into a Random Access Memory (RAM) 1203. In the RAM 1203, various programs and data required for the operation of the electronic device 1200 may also be stored. The computing unit 1201, the ROM 1202, and the RAM 1203 are connected to each other via a bus 1204. An input/output (I/O) interface 1205 is also connected to the bus 1204.

Various components in the electronic device 1200 are connected to the I/O interface 1205, including: an input unit 1206 such as a keyboard, mouse, etc.; an output unit 1207 such as various types of displays, speakers, and the like; a storage unit 1208 such as a magnetic disk, an optical disk, or the like; and a communication unit 1209, such as a network card, modem, wireless communication transceiver, etc. The communication unit 1209 allows the electronic device 1200 to exchange information/data with other devices through a computer network, such as the internet, and/or various telecommunications networks.

The computing unit 1201 may be a variety of general and/or special purpose processing components having processing and computing capabilities. Some examples of computing unit 1201 include, but are not limited to, a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), various specialized Artificial Intelligence (AI) computing chips, various computing units running machine learning model algorithms, digital Signal Processors (DSPs), and any suitable processor, controller, microcontroller, etc. The computing unit 1201 performs the respective methods and processes described above, for example, the control method of the power supply system shown in fig. 1 to 5 or the control method of the power supply system shown in fig. 7 to 8. For example, in some embodiments, the control method of the power supply system may be implemented as a computer software program tangibly embodied on a machine-readable medium, such as the storage unit 1208. In some embodiments, part or all of the computer program may be loaded and/or installed onto the electronic device 1200 via the ROM 1202 and/or the communication unit 1209. When a computer program is loaded into the RAM 1203 and executed by the computing unit 1201, one or more steps of the control method of the power supply system described above may be performed. Alternatively, in other embodiments, the computing unit 1201 may be used to perform the control method of the power supply system in any other suitable way (e.g. by means of firmware).

Various implementations of the systems and techniques described here above may be implemented in digital electronic circuitry, integrated circuit systems, field Programmable Gate Arrays (FPGAs), application Specific Integrated Circuits (ASICs), application Specific Standard Products (ASSPs), systems On Chip (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and/or combinations thereof. These various embodiments may include: implemented in one or more computer programs, the one or more computer programs may be executed and/or interpreted on a programmable system including at least one programmable processor, which may be a special purpose or general-purpose programmable processor, that may receive data and instructions from, and transmit data and instructions to, a storage system, at least one input device, and at least one output device.

Program code for carrying out methods of the present disclosure may be written in any combination of one or more programming languages. These program code may be provided to a processor or controller of a control device of a general purpose computer, special purpose computer, or other programmable power supply system such that the program code, when executed by the processor or controller, causes the functions/operations specified in the flowchart and/or block diagram to be implemented. The program code may execute entirely on the machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.

In the context of this disclosure, a machine-readable medium may be a tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. The machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. The machine-readable medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. More specific examples of a machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

To provide for interaction with a user, the systems and techniques described here can be implemented on a computer having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to a user; and a keyboard and pointing device (e.g., a mouse or trackball) by which a user can provide input to the computer. Other kinds of devices may also be used to provide for interaction with a user; for example, feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form, including acoustic input, speech input, or tactile input.

The systems and techniques described here can be implemented in a computing system that includes a background component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front-end component (e.g., a user computer having a graphical user interface or a web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such background, middleware, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: local Area Networks (LANs), wide Area Networks (WANs), the internet, and blockchain networks.

The computer system may include a client and a server. The client and server are typically remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The server can be a cloud server, also called a cloud computing server or a cloud host, and is a host product in a cloud computing service system, so that the defects of high management difficulty and weak service expansibility in the traditional physical hosts and VPS service ("Virtual Private Server" or simply "VPS") are overcome. The server may also be a server of a distributed system or a server that incorporates a blockchain.

According to an embodiment of the present disclosure, the present disclosure further provides a computer program product comprising a computer program, wherein the computer program, when being executed by a processor, implements the steps of the control method of the power supply system according to the above-described embodiments of the present disclosure.

It should be appreciated that various forms of the flows shown above may be used to reorder, add, or delete steps. For example, the steps recited in the present disclosure may be performed in parallel, sequentially, or in a different order, provided that the desired results of the disclosed aspects are achieved, and are not limited herein.

The above detailed description should not be taken as limiting the scope of the present disclosure. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present disclosure are intended to be included within the scope of the present disclosure.

Claims

1. A control method of a power supply system, the power supply system is configured with an uninterruptible power supply and a battery to realize a function of integrating energy storage and power backup, the method comprising:

Acquiring an energy storage discharging state of the battery, a current time and a full charge state of the battery, wherein the energy storage discharging state comprises state information of energy storage discharging of the battery, the current time is real-time obtained by automatic detection of an uninterruptible power supply, and the full charge state comprises state information of full charge of the battery;

acquiring a preset discharging period and a preset charging period;

according to the energy storage discharging state, the current time, the full state, the discharging period and the charging period, regulating the output voltage of the direct current bus so as to control the charging and discharging states of the power supply system; the charging and discharging states of the power supply system comprise a battery charging state, a battery energy storage discharging state and a normal discharging state, wherein the normal discharging state refers to a standby state that the battery is not charged and discharged, and only the uninterrupted power supply discharges;

wherein, control the charge and discharge state of the power supply system includes:

in response to the energy storage discharging state being non-energy storage discharging, dynamically adjusting the output voltage of the direct current bus to control the charging and discharging state of the power supply system to be in the battery charging state;

Responding to the energy storage discharging state as energy storage discharging, and adjusting the direct current bus voltage to be a preset energy storage discharging voltage when the current time is the discharging period so as to control the charging and discharging state of the power supply system to be in the battery energy storage discharging state;

responding to the energy storage discharging state as energy storage discharging, wherein the current time is not the discharging period, the full state is not full, and the current time is the charging period, and the direct current bus output voltage is dynamically regulated to control the charging and discharging state of the power supply system to be in the battery charging state;

and in response to the energy storage discharging state being energy storage discharging, the current time is not the discharging period, the full state is not full, and the current time is not the charging period, the direct current bus voltage is regulated to be a preset normal discharging voltage so as to control the charging and discharging state of the power supply system to be in the normal discharging state.

2. The control method according to claim 1, wherein:

acquiring the energy storage discharge state, including acquiring the energy storage discharge state from a battery management system;

Acquiring the full state includes acquiring the full state from the battery management system.

3. A control device of a power supply system, the power supply system being configured with an uninterruptible power supply and a battery to realize a function of integrating energy storage and standby power, the device comprising:

the first acquisition module is used for acquiring an energy storage discharging state of the battery, a current time and a full charge state of the battery, wherein the energy storage discharging state comprises state information of energy storage discharging of the battery, the current time is real-time acquired by automatic detection of the uninterruptible power supply, and the full charge state comprises state information of full charge of the battery;

the second acquisition module is used for acquiring a preset discharging period and a preset charging period;

the adjusting module is used for adjusting the output voltage of the direct current bus according to the energy storage discharging state, the current time, the full state, the discharging period and the charging period so as to control the charging and discharging states of the power supply system; the charging and discharging states of the power supply system comprise a battery charging state, a battery energy storage discharging state and a normal discharging state, wherein the normal discharging state refers to a standby state that the battery is not charged and discharged, and only the uninterrupted power supply discharges;

Wherein, the adjustment module includes:

the first adjusting unit is used for dynamically adjusting the output voltage of the direct current bus to control the charging and discharging state of the power supply system to be in the battery charging state in response to the fact that the energy storage and discharging state is non-energy storage and discharging;

the second adjusting unit is used for responding to the energy storage discharging state to be energy storage discharging, and adjusting the direct current bus voltage to be the preset energy storage discharging voltage when the current time is the discharging period so as to control the charging and discharging state of the power supply system to be in the battery energy storage discharging state;

the third adjusting unit is used for responding to the energy storage discharging state to be energy storage discharging, wherein the current time is not the discharging period, the full state is not full, and the current time is the charging period, and dynamically adjusting the output voltage of the direct current bus so as to control the charging and discharging states of the power supply system to be in the battery charging state;

and the fourth adjusting unit is used for responding to the fact that the energy storage discharging state is energy storage discharging, the current time is not the discharging period, the full state is not full, and the current time is not the charging period, and adjusting the direct current bus voltage to be a preset normal discharging voltage so as to control the charging and discharging state of the power supply system to be in the normal discharging state.

4. The control device of claim 3, wherein the first acquisition module comprises:

a first acquisition unit configured to acquire the energy storage discharge state from a battery management system;

and a second acquisition unit configured to acquire the full state from the battery management system.

5. A battery management system included in the power supply system of claim 1, the battery management system comprising:

the first end of the current sensor is connected with the positive electrode of the battery;

the anode of the diode is connected with the second end of the current sensor, and the cathode of the diode is connected with the first end of the first switch in the circuit breaker;

a contactor connected in parallel with the diode;

the circuit breaker comprises a first switch and a second switch which are in linkage, wherein the second end of the first switch is connected with the positive electrode of the direct current bus, the first end of the second switch is connected with the negative electrode of the battery, and the second end of the second switch is connected with the negative electrode of the direct current bus;

the battery management module is respectively connected with the current sensor, the contactor, the circuit breaker, the battery and the uninterrupted power supply;

The battery management module is used for acquiring the discharge current of the battery and the capacity of the battery acquired by the current sensor, generating an energy storage discharge state and a full charge state of the battery according to the capacity of the battery, sending the energy storage discharge state and the full charge state to an uninterruptible power supply, and controlling the actions of the contactor and the circuit breaker to realize the control method of claim 1.

6. A control method of a power supply system, wherein the power supply system configures an uninterruptible power supply and a battery to realize a function of integrating energy storage and power backup, the power supply system comprising the battery management system according to claim 5, the control method comprising:

acquiring the discharge current of the battery acquired by a current sensor;

acquiring the capacity of the battery;

generating a full state of the battery according to the capacity of the battery;

controlling the action of a contactor according to the discharging current and the full state so as to control the charging and discharging states of the battery, wherein the charging and discharging states of the battery comprise a battery charging state, a battery discharging state and a battery standby state, and the battery standby state is that the battery is in a state of not charging and not discharging;

Wherein controlling the charge and discharge state of the battery includes:

controlling the contactor to be closed in response to the discharge current exceeding a preset discharge current threshold value so as to control the battery to be in the battery discharge state;

controlling the contactor to be closed to control the battery to be in the battery charging state in response to the discharge current not exceeding a preset discharge current threshold and the full state being not full;

and controlling the contactor to be opened to control the battery to be in the battery standby state in response to the discharge current not exceeding a preset discharge current threshold and the full state being full.

7. A control device of a power supply system, wherein the power supply system configures an uninterruptible power supply and a battery to realize a function of integrating energy storage and power backup, the power supply system comprising the battery management system according to claim 5, the control device comprising:

the third acquisition module is used for acquiring the discharge current of the battery acquired by the current sensor;

a fourth acquisition module for acquiring the capacity of the battery;

a generation module for generating a full state of the battery according to the capacity of the battery;

The control module is used for controlling the action of the contactor according to the discharging current and the full state so as to control the charging and discharging states of the battery, wherein the charging and discharging states of the battery comprise a battery charging state, a battery discharging state and a battery standby state, and the battery standby state is a state that the battery is not charged and not discharged;

wherein, the control module includes:

the first control unit is used for controlling the contactor to be closed so as to control the battery to be in the battery discharging state in response to the fact that the discharging current exceeds a preset discharging current threshold value;

the second control unit is used for controlling the contactor to be closed so as to control the battery to be in the battery charging state in response to the discharging current not exceeding a preset discharging current threshold value and the full state being not full;

and the third control unit is used for controlling the contactor to be disconnected to control the battery to be in the battery standby state in response to the fact that the discharge current does not exceed a preset discharge current threshold value and the full state is full.

8. An electronic device, comprising:

at least one processor; and

A memory communicatively coupled to the at least one processor; wherein, the liquid crystal display device comprises a liquid crystal display device,

the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the control method of any one of claims 1-2 and 6.

9. A non-transitory computer-readable storage medium storing computer instructions for causing a computer to execute the control method according to any one of claims 1-2 and 6.