Battery swapping system, battery swapping system control method, control device, and storage medium

Abstract

A battery swapping system, a battery swapping system control method, a control device, and a storage medium. The battery swapping system comprises: a transformer, a power conversion system, a busbar device, a control device, and a plurality of battery swapping compartments, wherein the plurality of battery swapping compartments are connected to the power conversion system by means of the busbar device; the power conversion system is connected to a power grid outside the battery swapping system by means of the transformer; the control device is connected to the plurality of battery swapping compartments; the plurality of battery swapping compartments are used for storing a plurality of power batteries; and the control device is used for controlling a first target power battery to transmit electric energy to the power grid and is further used for controlling a second target power battery to obtain the electric energy from the power grid, wherein the first target power battery is a power battery having the capability of supplying power to the power grid while guaranteeing the performance of the first target power battery. Therefore, the integration level of the battery swapping system can be improved, and the value of the battery swapping system in energy supply can be developed as much as possible with low hardware costs.

Description

A battery swap system, a battery swap system control method, a control device and a storage medium

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on June 16, 2023, with application number 202310714440.2 and invention name “A battery exchange system, a battery exchange system control method, a control device and a storage medium”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application belongs to the field of energy technology, and in particular relates to a battery exchange system, a battery exchange system control method, a control device and a computer-readable storage medium. Background Art

[0003] With the vigorous promotion of new energy and policy guidance, battery swapping has become a particularly important technology in the field of automotive electrification. In recent years, with the promotion and implementation of battery swapping technology, battery swapping systems focusing on providing battery swapping services for electric vehicles have been established on the market, marking the initial stage of battery swapping development.

[0004] However, the current battery swap system generally equips each battery swap battery compartment with a DC charging pile, which will result in low system integration, high hardware cost and single function of the battery swap system, and cannot fully realize the value of the battery swap system in energy supply.

[0005] Application Contents

[0006] The present application provides a battery swap system, a battery swap system control method, a control device and a computer-readable storage medium, which can improve the system integration of the battery swap system and enable the battery swap system to maximize its value in energy supply at a lower hardware cost.

[0007] In a first aspect, the present application provides a battery swap system, which includes: a transformer, a power conversion system (PCS), a confluence device, a control device, and multiple battery swap compartments;

[0008] Among them, multiple battery swap compartments are connected to the PCS through a confluence device; the PCS is connected to the power grid outside the battery swap system through a transformer; the control device is connected to the multiple battery swap compartments; the multiple battery swap compartments are used to store multiple power batteries;

[0009] The control device is used to control a first target power battery among the multiple power batteries to transmit electric energy to the power grid via the converging device and the energy storage converter. The first target power battery is a power battery capable of supplying power to the power grid while ensuring its own performance.

[0010] The control device is further configured to control a second target power battery among the plurality of power batteries to obtain electric energy from the power grid via the merging device and the energy storage converter.

[0011] In a second aspect, the present application provides a battery swap system control method, which is applied to the battery swap system of the first aspect, and includes:

[0012] Obtain status information of multiple power batteries;

[0013] According to the status information of the multiple power batteries, a first target power battery among the multiple power batteries is controlled to transmit electric energy to the power grid via the merging device and the energy storage converter.

[0014] In a third aspect, the present application provides a control device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the method of the second aspect when executing the computer program.

[0015] In a fourth aspect, the present application provides a computer-readable storage medium, which stores a computer program, and when the computer program is executed by a processor, implements the steps of the method of the first aspect.

[0016] Compared with the prior art, the beneficial effects of the present application are as follows: the system architecture of the battery exchange system is optimized, the one-to-one DC charging pile in the existing battery exchange system is adjusted to a one-to-many PCS, and a convergence device and a control device are set between the PCS and the battery exchange battery compartment. Through the newly added PCS, the battery exchange system has the ability to transmit electric energy in both directions, and the hardware cost is reduced. Based on this optimized system architecture, the control device can control the first target power battery among the multiple power batteries stored in the battery exchange battery compartment to transmit electric energy to the power grid via the convergence device and the PCS, and control the second target power battery among the multiple power batteries stored in the battery exchange battery compartment to obtain electric energy from the power grid via the convergence device and the PCS according to the needs of the actual application scenario, so that the battery exchange system can realize the value of grid-connected peak shaving and valley filling in energy supply.

[0017] It can be understood that the beneficial effects of the second to fourth aspects mentioned above can be found in the relevant description of the first aspect mentioned above, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0019] FIG1 is a schematic diagram of the system architecture of a battery swap system in the prior art;

[0020] FIG2 is a schematic diagram of the system architecture of the battery swapping system provided in an embodiment of the present application;

[0021] FIG3 is a schematic diagram of an implementation flow of a battery swap system control method provided in an embodiment of the present application;

[0022] FIG4 is a schematic diagram of the structure of the control device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0023] In the following description, specific details such as specific system structures and techniques are provided for purposes of illustration rather than limitation to facilitate a thorough understanding of the embodiments of the present application. However, it will be apparent to those skilled in the art that the present application may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid obscuring the description of the present application with unnecessary detail.

[0024] It should be understood that when used in the present specification and the appended claims, the term "comprising" indicates the presence of described features, integers, steps, operations, elements and / or components, but does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or collections thereof.

[0025] It will also be understood that the term "and / or" used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0026] As used in this specification and the appended claims, the term "if" can be interpreted as "when" or "upon" or "in response to determining" or "in response to detecting," depending on the context. Similarly, the phrase "if it is determined" or "if [described condition or event] is detected" can be interpreted as meaning "upon determination" or "in response to determining" or "upon detection of [described condition or event]" or "in response to detecting [described condition or event]," depending on the context.

[0027] In addition, in the description of the present application specification and the appended claims, the terms "first" and "second" etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0028] References to "one embodiment" or "some embodiments" in this specification mean that a particular feature, structure, or characteristic described in conjunction with that embodiment is included in one or more embodiments of the present application. Thus, phrases such as "in one embodiment," "in some embodiments," "in other embodiments," and "in yet other embodiments" appearing in various places in this specification do not necessarily refer to the same embodiment, but rather mean "one or more but not all embodiments," unless otherwise specifically emphasized. The terms "including," "comprising," "having," and variations thereof all mean "including but not limited to," unless otherwise specifically emphasized.

[0029] With the vigorous promotion of new energy and policy guidance, battery swapping has become a particularly important technology in the field of automotive electrification. In recent years, with the promotion and implementation of battery swapping technology, battery swapping systems (such as battery swapping stations) have been built on the market, focusing on providing battery swapping services for electric vehicles. This marks the initial stage of battery swapping development.

[0030] Please refer to Figure 1, which shows a schematic diagram of the system architecture of the current battery swap system. As shown in Figure 1, the current battery swap system generally configures a DC charging pile for each battery swap compartment; that is, the number of DC charging piles is the same as the number of battery swap compartments in the battery swap system. This, on the one hand, leads to a lower system integration of the battery swap system, and on the other hand, it also leads to a higher hardware cost of the battery swap system. In addition, limited by the single function of the DC charging pile, the current battery swap system can only transmit electricity from the power grid to the battery swap compartment in one direction, making the interaction mode between the battery swap system and the power grid single, and unable to bring into play the full value of the battery swap system in energy supply. Among them, the power grid refers to: outside the battery swap system, the entirety of substations and transmission and distribution lines of various voltages.

[0031] Based on the above considerations, the embodiments of the present application propose a battery swap system, a battery swap system control method, a control device and a computer-readable storage medium. By improving the system architecture of the battery swap system, the system integration of the battery swap system can be improved, so that the battery swap system can maximize its value in energy supply at a lower hardware cost.

[0032] Since the one-to-one DC charging pile in the battery swap system has been adjusted to a one-to-many PCS, the battery swap system has the ability to transmit electricity in both directions, and the hardware cost has been reduced. In addition, a control device is installed between the PCS and the battery swap battery compartment. Since the control device can control the first target power battery among the multiple power batteries stored in the battery swap battery compartment to transmit electricity to the power grid according to the needs of the actual application scenario, the battery swap system can realize the value of grid-connected peak-shaving and valley-filling in energy supply.

[0033] To facilitate understanding of the battery exchange system proposed in the embodiment of the present application, the battery exchange system is explained and illustrated through specific embodiments below. Please refer to Figure 2, which shows a schematic diagram of the system architecture of the battery exchange system proposed in the embodiment of the present application. As shown in Figure 2, the battery exchange system includes but is not limited to the following equipment: a transformer, a PCS, a convergence device, a control device, and a plurality of battery exchange battery compartments, such as battery exchange battery compartment 1 to battery exchange battery compartment N. Among them, the battery exchange battery compartments can store multiple power batteries respectively.

[0034] Compared with the prior art, the battery swapping system proposed in the embodiment of the present application has the following improvements:

[0035] One end of the transformer is connected to the power grid outside the battery swap system, and the other end is connected to the PCS. In other words, the PCS is connected to the power grid through the transformer.

[0036] A convergence device and a control device are provided between the multiple battery-exchange battery compartments and the PCS. Specifically, the multiple battery-exchange battery compartments are connected to the PCS via the convergence device, which can be expressed as follows: the connection between the PCS and the convergence device, and the connection between the convergence device and the multiple battery-exchange battery compartments are all high-voltage circuit connections. Specifically, the control device is connected to the multiple battery-exchange battery compartments, which can be expressed as follows: the connection between the control device and the multiple battery-exchange battery compartments are all low-voltage communication circuit connections. Furthermore, the control device is also connected to the PCS, which can be expressed as follows: the connection between the control device and the PCS is also a low-voltage communication circuit connection.

[0037] Among them, the transformer has the function of reducing high voltage and increasing low voltage; the PCS integrates an AC / DC conversion module, has the function of AC / DC conversion, and can realize two-way transmission of electric energy through the PCS; the convergence device is the main system for electric energy transmission in the battery swap system, which has the function of gathering the electric energy transmission channels of multiple battery swap battery compartments; the control device is the slave system for electric energy transmission in the battery swap system, which has the function of controlling the power battery in the battery swap battery compartment and the working status of the PCS.

[0038] Based on the functions of each device in the battery swap system proposed above, the control device can control a first target power battery among the multiple power batteries to transmit electrical energy to the grid via the convergence device and the PCS, thereby enabling the first target power battery to supply power to the grid. To prevent damage to the battery life due to overdischarge, the first target power battery can be a power battery capable of supplying power to the grid while maintaining its own performance. Specifically, the first target power battery can be all or some of the multiple power batteries, and can be determined based on the status of each power battery and the control strategy adopted by the control device.

[0039] In addition, the control device can also control a second target power battery among the multiple power batteries to obtain power from the grid via the merging device and the PCS, thereby enabling the grid to charge the second target power battery. Similar to the first target power battery, the second target power battery can also be all or part of the multiple power batteries.

[0040] It should be noted that the operation of the first target power battery transmitting electric energy to the power grid and the operation of the second target power battery obtaining electric energy from the power grid cannot be performed simultaneously; that is, the control device cannot control the second target power battery to obtain electric energy from the power grid while controlling the first target power battery to transmit electric energy to the power grid.

[0041] In addition, in order to give full play to the battery swapping function of the battery swapping system, the control device can also instruct the third target power battery among the multiple power batteries to swap power for the power-consuming equipment. For example, it can display the information of the third target power battery (such as the number and / or position, etc.) through a display screen, etc., to guide the user to swap power for the power-consuming equipment based on the third target power battery; or, the information of the third target power battery can also be sent to a battery swapping device, such as a battery swapping cart, etc., to guide the battery swapping device to swap power for the power-consuming equipment based on the third target power battery. Among them, the power-consuming equipment is specifically a device that has run out of power, such as an electric car that has run out of power; the third target power battery can be a battery that is fully charged or close to fully charged among the multiple power batteries. The battery swapping operation performed by the battery swapping system can enable the power-consuming equipment to be put back into normal use immediately after the battery swap.

[0042] In the battery exchange system proposed in the embodiment of the present application, the number of PCSs and confluence devices can be expanded according to actual conditions, thereby achieving adaptation to the number of battery exchange battery compartments and the voltage level of the power battery. Based on this, as an example only, in the battery exchange system, the PCS may include a first PCS and a second PCS (there may actually be more PCSs), and the confluence device may include a first confluence device and a second confluence device (there may actually be more confluence devices); then, the first battery exchange battery compartment among the multiple battery exchange battery compartments can be connected to the first PCS through the first confluence device, and the second battery exchange battery compartment among the multiple battery exchange battery compartments can be connected to the second PCS through the second confluence device, wherein the first battery exchange battery compartment is different from the second battery exchange battery compartment, and both are partial battery compartments among the multiple battery exchange battery compartments.

[0043] In some examples, to prevent equipment from being broken down by high voltage, in the optimized battery swap system, considering that the power battery may need to obtain electricity from the power grid, the voltage level of the AC side of the PCS needs to match the voltage level of the output voltage of the transformer; and considering that the power battery may also need to transmit electricity to the power grid, the voltage level of the DC side of the PCS needs to match the voltage level of the output voltage of the busbar device, and the DC withstand voltage capability of the busbar device also needs to match the voltage level of the connected battery swap compartment.

[0044] From this, we can see that if there are multiple power batteries with different voltage levels in a battery swap system, the number of convergence devices and PCSs can be considered to be expanded. Specifically, if there are N different batches of power batteries, and different batches of power batteries are stored in different battery swap compartments, and the voltage levels of different batches of power batteries are different, then the battery swap system can expand N convergence devices and N PCSs accordingly. Each batch of power batteries has a corresponding convergence device and PCS, so that the voltage level of a batch of power batteries can be matched with the DC withstand voltage capability of the corresponding convergence device and the voltage level of the corresponding PCS. Of course, the expansion of the number of PCSs will also help the battery swap system meet the charging and discharging needs of more power batteries.

[0045] To ensure that the power battery is not damaged during power transmission, the control device may monitor the battery status of each first target power battery while controlling the first target power battery to transmit power to the grid, periodically sampling the voltage and temperature of each first target power battery. If a power battery anomaly is detected, the control device may disconnect the power battery from transmitting power to the grid, effectively stopping the power battery from transmitting power to the grid. By way of example only, such anomalies include, but are not limited to, battery voltage falling below a preset lower voltage threshold and battery temperature exceeding a preset temperature threshold. Similarly, when controlling the second target power battery to draw power from the grid, the control device may monitor the battery status of each second target power battery while controlling the second target power battery to draw power from the grid, periodically sampling the voltage and temperature of each second target power battery. If a power battery anomaly is detected, the control device may disconnect the power battery from drawing power from the grid, effectively stopping the power battery from drawing power from the grid. By way of example only, such anomalies include, but are not limited to, battery voltage exceeding a preset upper voltage threshold and battery temperature exceeding a preset temperature threshold.

[0046] Based on the optimized battery swap system proposed above, the battery swap system control method is explained and illustrated through a specific embodiment. Among them, the battery swap system control method is applied to the optimized battery swap system, specifically the control device applied to the battery swap system. Please refer to Figure 3, the battery swap system control method includes:

[0047] Step 301: Acquire status information of multiple power batteries.

[0048] Based on the battery swap system architecture described above, the control device has established a low-voltage communication circuit connection with multiple battery swap compartments. Based on this low-voltage communication circuit connection, the control device can obtain status information of all power batteries connected to the battery swap compartments. As an example only, this status information may include but is not limited to one or more of the following: state of charge, temperature, and the duration of the current station.

[0049] Step 302 : Control a first target power battery among the multiple power batteries to transmit electric energy to a power grid via a busbar and a PCS according to status information of the multiple power batteries.

[0050] To prevent excessive power battery losses and ensure orderly power transmission when transmitting electricity to the power grid, the control device can be pre-configured with a corresponding control strategy. This allows the control device to identify the first target power batteries that meet the control strategy from among the multiple power batteries connected to the battery swap system. This means that these first target power batteries can transmit power while ensuring their performance. The control device then controls these first target power batteries to transmit power to the power grid via the confluence device and PCS.

[0051] In some examples, the control strategy may be: a power battery whose state of charge is greater than a preset first state of charge threshold value may be determined as a first target power battery. The first state of charge threshold value may be set to 80% or other values, which may be specifically set by the staff of the battery swap system according to the material and performance of the power battery. It can be understood that the purpose of such a control strategy is: the state of charge of the power battery is greater than the preset first state of charge threshold value, indicating that the power battery has been fully charged or close to fully charged before, and it retains more electrical energy, and therefore can be determined as the first target power battery.

[0052] In some examples, the control strategy may also be: a power battery whose current in-station time is longer than a preset first time threshold may be determined as a first target power battery. The first time threshold may be specifically set by the staff of the battery swap system according to the time it takes for the power battery to be charged from a low power level to a full power level. It is understandable that the purpose of such a control strategy is: if the current in-station time of a power battery is longer than the preset first time threshold, it means that the power battery has been charged in the battery swap system for a long period of time and has more retained electrical energy, and thus can be determined as the first target power battery.

[0053] In some examples, the control strategy may also be: sorting multiple power batteries connected to the battery swap system according to the order of state of charge from largest to smallest, and determining a specified number of power batteries with the highest order as the first target power batteries. The specified number can be set by the staff of the battery swap system based on the total number of power batteries connected to the battery swap system, for example, it can be set to 20% of the total number. It is understood that the purpose of such a control strategy is: after sorting according to the order of state of charge from largest to smallest, the power batteries with the highest order are the power batteries with relatively high power in the battery swap system, and thus can be determined as the first target power batteries. Furthermore, considering the extreme situation that all power batteries in the battery swap system have low power, in order to prevent the power batteries from continuing to transmit power when the power batteries are low in power, the control device can determine the power batteries with a state of charge greater than a preset second state of charge threshold among the specified number of power batteries with the highest order as the first target power batteries. The second state of charge threshold is lower than the first state of charge threshold described above. For example, the second state of charge threshold can be set to 50% or another value.

[0054] In some embodiments, given that the power grid has a relatively sufficient power supply most of the time, the power batteries in the battery swap system do not need to transmit power to the grid at all times, but only need to transmit power to the grid when the power supply is insufficient. Based on this, before step 302, the control device may also first obtain power status information from the power grid. Accordingly, step 302 may be performed as follows: based on the power status information of the power grid and the status information of the multiple power batteries, the first target power battery among the multiple power batteries is controlled to transmit power to the power grid via the convergence device and the PCS.

[0055] The control device can exchange data with the power grid through the station control system of the battery swap system and an external cloud platform to obtain power status information of the power grid. This power status information may include but is not limited to at least one of the following: power load, load status and corresponding duration.

[0056] The control device uses the power status information of the power grid to determine whether the current power supply of the power grid is sufficient. Only when the power supply of the power grid is insufficient will it be considered necessary for the current battery swap system to transmit power to the grid. At this time, the control device will determine the first target power battery from multiple power batteries based on any of the control strategies proposed above to transmit power to the grid.

[0057] Specifically, the control device can determine whether the power grid is in a specified load state based on the power state information of the power grid. The specified load state refers to the situation where the difference between the power load of the power grid and a preset power load is less than a preset difference threshold. The preset power load can be determined by performing big data analysis on the power load conditions of the power grid during past periods of insufficient power supply; or the preset power load can be determined based on the maximum power load of the power grid over a period of time; or the preset power load can be determined based on the maximum power generation capacity of the power grid.

[0058] It is understood that if the power status information carries information about the power load, the control device needs to compare it with the preset power load to determine whether the power grid is in the specified load state. If the power status information carries information about the load state, the control device can directly determine whether the load state is the specified load state. Of course, if the power grid's information transmission policy is to transmit power status information carrying its load state only when it is in a specified load state, the control device can also directly determine that the power grid is currently in the specified load state after receiving the power status information.

[0059] When the power grid is in this designated load state, the control device will determine that the power grid's current energy supply is insufficient and will control the first target power battery to transmit power to the power grid. Of course, to prevent short-term fluctuations in the power grid's energy supply from causing the control device to frequently switch the power battery's charge and discharge states, the control device can also compare the duration of the power grid's current designated load state with a preset second duration threshold. If the duration of the power grid's current designated load state exceeds this second duration threshold, the control device will determine that the power grid's current energy supply is insufficient and will control the first target power battery to transmit power to the power grid via the convergence device and the PCS.

[0060] In some embodiments, when the power grid is not in a specified load state, or when a first target power battery is not determined among multiple power batteries, the control device may determine a second target power battery among multiple power batteries based on status information of the multiple power batteries, and control the second target power battery to obtain electrical energy from the power grid via the convergence device and the PCS.

[0061] It can be understood that if the power grid is not in a specified load state, it can be known that the power grid does not currently have a problem of insufficient power supply, that is, it is not currently a peak period of electricity consumption. At this time, the battery swap system can perform its functions normally and charge the power battery. Considering that some power batteries in the battery swap system may be fully charged, the second target power battery in this case can be: a power battery whose state of charge has not reached the first state of charge threshold, that is, a power battery that is not fully charged or not close to fully charged.

[0062] In addition, through the control strategy described above, it can be seen that all power batteries may be determined as the first target power batteries, only some power batteries may be determined as the first target power batteries, and no power battery may be determined as the first target power battery. In the case that no power battery is determined as the first target power battery, it can be considered that all current power batteries do not store enough electrical energy. Considering that the main purpose of the battery swap system is to meet the user's battery swap needs, the second target power battery in this case can be: all power batteries. That is, for the battery swap system, the priority of energy supply to power batteries is higher than the priority of energy supply to the power grid. In the extreme case where all power batteries in the battery swap system have low power, even if the energy supply of the power grid is insufficient, the battery swap system can still obtain electricity from the power grid.

[0063] In some embodiments, if the battery swap system detects the arrival of a power-consuming device, the control device may also control a third target power battery among the multiple power batteries to swap power for the power-consuming device, thereby fully utilizing the battery swap function of the battery swap system and enabling the power-consuming device to immediately resume normal use after the battery swap. Specifically, the power-consuming device may be a device that is out of power, such as an electric vehicle, and the third target power battery may be a fully charged or nearly fully charged battery among the multiple power batteries.

[0064] From the above, it can be seen that the embodiment of the present application optimizes the system architecture of the battery swap system, adjusts the one-to-one DC charging pile in the existing battery swap system to a one-to-many PCS, and sets a convergence device and a control device between the PCS and the battery swap battery compartment. Through the newly added PCS, the battery swap system has the ability to transmit electric energy in both directions, and the hardware cost can be reduced. Based on this optimized system architecture, the control device can control the first target power battery among the multiple power batteries stored in the battery swap battery compartment to transmit electric energy to the power grid, and control the second target power battery among the multiple power batteries stored in the battery swap battery compartment to obtain electric energy from the power grid according to the needs of the actual application scenario, so that the battery swap system can realize the value of grid-connected peak shaving and valley filling in energy supply.

[0065] Corresponding to the battery exchange system control method provided above, an embodiment of the present application also provides a control device. Referring to Figure 4, the control device 4 in the embodiment of the present application includes: a memory 401, one or more processors 402 (only one is shown in Figure 4) and a computer program stored on the memory 401 and executable on the processor. Wherein: the memory 401 is used to store software programs and modules, and the processor 402 executes various functional applications and data processing by running the software programs and units stored in the memory 401 to obtain the resources corresponding to the above-mentioned preset events. Specifically, the processor 402 implements the following steps when running the above-mentioned computer program stored in the memory 401:

[0066] Obtain status information of multiple power batteries;

[0067] According to the status information of the multiple power batteries, a first target power battery among the multiple power batteries is controlled to transmit electric energy to the power grid via the merging device and the energy storage converter.

[0068] Assuming that the above is the first possible implementation, in a second possible implementation provided on the basis of the first possible implementation, before controlling a first target power battery among the multiple power batteries to transmit electric energy to the power grid via a bus device and an energy storage converter according to the status information of the multiple power batteries, the processor 402 implements the following steps when running the computer program stored in the memory 401:

[0069] Obtain power status information of the power grid;

[0070] Controlling a first target power battery among the multiple power batteries to transmit electric energy to a power grid via a merging device and an energy storage converter according to status information of the multiple power batteries, comprising:

[0071] According to the power status information of the power grid and the status information of the multiple power batteries, a first target power battery among the multiple power batteries is controlled to transmit electric energy to the power grid via the merging device and the energy storage converter.

[0072] In a third possible implementation provided as a basis for the second possible implementation, controlling a first target power battery among the multiple power batteries to transmit electric energy to the grid via a bus device and an energy storage converter according to power status information of the grid and status information of the multiple power batteries includes:

[0073] Determine whether the grid is in a specified load state based on the power state information of the grid;

[0074] When the power grid is in a specified load state, determining a first target power battery among the multiple power batteries according to state information of the multiple power batteries;

[0075] The first target power battery is controlled to transmit electric energy to the power grid via the merging device and the energy storage converter.

[0076] In a fourth possible implementation provided as a basis of the third possible implementation, the status information includes a state of charge; and determining a first target power battery from among the multiple power batteries based on the status information of the multiple power batteries includes:

[0077] A power battery whose state of charge is greater than a preset state of charge threshold is determined as a first target power battery.

[0078] In a fifth possible implementation provided as a basis of the third possible implementation, the status information includes a state of charge; and determining a first target power battery from among the multiple power batteries based on the status information of the multiple power batteries includes:

[0079] Sort multiple power batteries according to the state of charge from large to small;

[0080] A specified number of power batteries ranked at the top are determined as first target power batteries.

[0081] In a sixth possible implementation provided on the basis of the third possible implementation, the processor 402 implements the following steps when running the computer program stored in the memory 401:

[0082] When the power grid is not in a designated load state, or when the first target power battery is not determined among the multiple power batteries, determining a second target power battery among the multiple power batteries according to state information of the multiple power batteries;

[0083] The second target power battery is controlled to obtain electric energy from the power grid via the merging device and the energy storage converter.

[0084] It should be understood that in the embodiment of the present application, the processor 402 may be a central processing unit (CPU), and the processor may also be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor, etc.

[0085] The memory 401 may include a read-only memory and a random access memory, and provides instructions and data to the processor 402. A portion or all of the memory 401 may also include a non-volatile random access memory. For example, the memory 401 may also store device type information.

[0086] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant description of other embodiments.

[0087] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0088] In the embodiments provided in this application, it should be understood that the disclosed devices / network equipment and methods can be implemented in other ways. For example, the device / network equipment embodiments described above are merely schematic. For example, the division of modules or units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0089] Units described as separate components may or may not be physically separate, and components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0090] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. A battery replacement system, characterized in that: The battery exchange system includes: a transformer, an energy storage converter, a converging device, a control device, and a plurality of battery exchange compartments; The multiple battery-swap battery compartments are connected to the energy storage converter via the confluence device; the energy storage converter is connected to the power grid outside the battery-swap system via the transformer; the control device is connected to the multiple battery-swap battery compartments; the multiple battery-swap battery compartments are used to store multiple power batteries; The control device is used to control a first target power battery among the plurality of power batteries to transmit electric energy to the power grid via the converging device and the energy storage converter, wherein the first target power battery is a power battery capable of supplying power to the power grid while ensuring its own performance; The control device is further used to control a second target power battery among the plurality of power batteries to obtain electric energy from the power grid via the merging device and the energy storage converter.

2. The battery replacement system according to claim 1, characterized in that: The energy storage inverter includes a first energy storage inverter and a second energy storage inverter, and the convergence device includes a first convergence device and a second convergence device; the first battery exchange battery compartment among the multiple battery exchange battery compartments is connected to the first energy storage inverter through the first convergence device, and the second battery exchange battery compartment among the multiple battery exchange battery compartments is connected to the second energy storage inverter through the second convergence device.

3. The battery replacement system according to claim 1, characterized in that: The control device is also used to instruct a third target power battery among the multiple power batteries to replace power for the power-consuming equipment.

4. A method for controlling a battery swap system, characterized in that: The battery swap system control method is applied to the battery swap system according to any one of claims 1 to 3, and the battery swap system control method includes: Acquiring status information of the multiple power batteries; The first target power battery among the plurality of power batteries is controlled to transmit electric energy to the power grid via the merging device and the energy storage converter according to the state information of the plurality of power batteries.

5. The battery replacement system control method according to claim 4, characterized in that: Before controlling the first target power battery among the plurality of power batteries to transmit electric energy to the power grid via the merging device and the energy storage converter according to the status information of the plurality of power batteries, the power exchange system control method further includes: Acquiring power status information of the power grid; The controlling the first target power battery among the plurality of power batteries to transmit electric energy to the power grid via the merging device and the energy storage converter according to the state information of the plurality of power batteries comprises: According to the power status information of the power grid and the status information of the multiple power batteries, the first target power battery among the multiple power batteries is controlled to transmit electric energy to the power grid via the merging device and the energy storage converter.

6. The battery replacement system control method according to claim 5, characterized in that: The controlling the first target power battery among the plurality of power batteries to transmit electric energy to the power grid via the merging device and the energy storage converter according to the power status information of the power grid and the status information of the plurality of power batteries comprises: Determining whether the power grid is in a specified load state according to the power state information of the power grid; When the power grid is in a specified load state, determining a first target power battery among the multiple power batteries according to the state information of the multiple power batteries; The first target power battery is controlled to transmit electric energy to the power grid via the merging device and the energy storage converter.

7. The battery replacement system control method according to claim 6, characterized in that: The state information includes a state of charge; and determining a first target power battery from among the multiple power batteries according to the state information of the multiple power batteries includes: A power battery whose state of charge is greater than a preset state of charge threshold is determined as the first target power battery.

8. The battery replacement system control method according to claim 6, characterized in that: The state information includes a state of charge; and determining a first target power battery from among the multiple power batteries according to the state information of the multiple power batteries includes: Sorting the plurality of power batteries according to the state of charge from large to small; A specified number of power batteries that are ranked first are determined as the first target power batteries.

9. The battery replacement system control method according to claim 6, characterized in that: The battery swap system control method further includes: When the power grid is not in a designated load state, or when the first target power battery is not determined among the multiple power batteries, determining a second target power battery among the multiple power batteries according to state information of the multiple power batteries; The second target power battery is controlled to obtain electric energy from the power grid via the merging device and the energy storage converter.

10. A control device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the method according to any one of claims 4 to 9 is implemented.

11. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the method according to any one of claims 4 to 9 is implemented.

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