Battery replacement cabinet energy storage standby power method and system and storage medium

Abstract

The invention relates to the technical field of power conversion cabinets, in particular to a power conversion cabinet energy storage standby power method and system and a storage medium. The method comprises the following steps: after a commercial power grid is powered off, judging whether a battery replacement cabinet is currently in a non-battery replacement peak period or not; if yes, based on the electric quantity equalization instruction, controlling the in-cabinet batteries with the initial electric quantity higher than a preset electric quantity threshold value to discharge, and controlling the in-cabinet batteries with the initial electric quantity lower than the preset electric quantity threshold value to charge until the electric quantity of the in-cabinet batteries of the battery changing cabinet reaches a relative equalization state; and based on the energy storage discharge instruction, all the in-cabinet batteries are controlled to enter a discharge state, and all the in-cabinet batteries are used as standby power supplies to discharge external energy stations connected to the battery replacement cabinet. According to the invention, the utilization rate of the battery of the battery changing cabinet is improved, and standby power support is provided for an external energy station in an emergency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery swap cabinets, in particular to a battery swap cabinet energy storage standby power method, system and storage medium. BACKGROUND

[0002] With the increasing pressure on the power grid, some power shortage areas frequently encounter power failure. When the city power supply is interrupted, the battery swap cabinet cannot continue to charge the battery in the cabinet, and the battery in the battery swap cabinet as an energy storage unit cannot be borrowed if the battery does not reach the battery replacement threshold. At present, the construction range of battery swap cabinets and related battery swap stations is gradually expanding, and there may be some stations with low battery replacement frequency, and the batteries in the battery swap cabinet are idle during the non-battery replacement peak period, which not only wastes resources, but also limits the potential of battery swap cabinets in multiple fields. Therefore, under the condition of city power supply interruption, the prior art lacks a method that can improve the battery utilization rate of the battery swap cabinet. SUMMARY

[0003] The present application aims to provide a battery swap cabinet energy storage standby power method, system and storage medium, which improves the battery utilization rate of the battery swap cabinet under the condition of city power supply interruption.

[0004] To achieve the above-mentioned purpose, the present application provides the following technical scheme: A battery swap cabinet energy storage standby power method, comprising: After the city power supply is interrupted, it is judged whether the battery swap cabinet is currently in a non-battery replacement peak period; If so, based on the power balance instruction, control the discharge of the battery in the cabinet whose initial power is higher than the preset power threshold, and control the charging of the battery in the cabinet whose initial power is lower than the preset power threshold, until the power of the battery in the cabinet reaches a relatively balanced state; Based on the energy storage discharge instruction, control all batteries in the cabinet to enter the discharge state, and discharge all batteries in the cabinet as standby power supply to the external energy station connected to the battery swap cabinet.

[0005] Further, each battery in the cabinet is connected to the DC bus of the battery swap cabinet by using a corresponding bidirectional DCDC module, and the charging or discharging of the battery connected to the DC bus is realized by controlling the bidirectional DCDC module.

[0006] Further, based on the power balance instruction, control the battery in the cabinet whose power reaches the preset power threshold to stop charging / discharging.

[0007] Further, the power of the battery in the cabinet reaches a relatively balanced state, comprising: The power of each battery in the cabinet reaches the preset power threshold; Or, the preset proportion of the battery in the cabinet reaches the preset power threshold. Or, the preset proportion of the battery in the cabinet reaches the preset power threshold.

[0008] Further, the external energy station is electrically connected with the DC busbar. Based on the energy storage discharge instruction, each battery in the cabinet discharges to the external energy station using the DC busbar.

[0009] Further, the method further comprises: After the power grid is powered off, if it is judged that the battery replacement cabinet is currently in a battery replacement peak period, a battery replacement control strategy is executed; The battery replacement control strategy comprises: The battery in the cabinet with an initial power lower than a replaceable threshold is sequentially determined as a target battery to be charged in order of power from high to low; The battery in the cabinet with an initial power lower than the target battery to be charged is discharged, and the target battery to be charged is charged until the power of the target battery to be charged reaches the replaceable threshold.

[0010] A battery replacement cabinet energy storage standby power system comprises: A judgment module is configured to judge whether the battery replacement cabinet is currently in a non-battery replacement peak period after the power grid is powered off; A power balancing module is configured to receive a power balancing instruction when it is judged that the battery replacement cabinet is currently in a non-battery replacement peak period, and control the battery in the cabinet with an initial power higher than a preset power threshold to discharge and control the battery in the cabinet with an initial power lower than the preset power threshold to charge based on the power balancing instruction until the power of the battery in the cabinet reaches a relatively balanced state. An energy storage discharge module is configured to receive an energy storage discharge instruction and control all batteries in the cabinet to enter a discharge state based on the energy storage discharge instruction, and discharge all batteries in the cabinet as standby power sources to the external energy station connected to the battery replacement cabinet.

[0011] Further, the power of the battery in the cabinet of the battery replacement cabinet reaches a relatively balanced state, comprising: The power of each battery in the cabinet reaches the preset power threshold; Or, the power of a preset number of batteries in the cabinet reaches the preset power threshold; Or, the power of a preset proportion of the battery in the cabinet reaches the preset power threshold.

[0012] Further, the system further comprises: A battery replacement control module is configured to execute a battery replacement control strategy when the judgment module judges that the battery replacement cabinet is currently in a battery replacement peak period. The battery replacement control strategy comprises: The battery in the cabinet with initial electric quantity lower than the replaceable threshold is determined as a target battery to be charged in turn according to the electric quantity from high to low; The other batteries in the cabinet with initial electric quantity lower than the electric quantity of the target battery to be charged are controlled to be discharged, and the target battery to be charged is charged until the electric quantity of the target battery to be charged reaches the replaceable threshold.

[0013] Based on the same inventive concept, the application further provides a computer storage medium, wherein computer executable instructions are stored in the computer storage medium, and the computer executable instructions realize the energy storage and standby power supply method of the battery replacement cabinet when executed.

[0014] Technical effects and advantages of the application: (1) In the case of power grid outage, the battery replacement cabinet is linked with the external energy site, and the battery replacement cabinet can be switched from the battery replacement service state to the standby power supply service state during the non-battery replacement peak period, thereby improving the utilization efficiency of the battery of the battery replacement cabinet and providing standby power supply support for the external energy site in emergency situations; (2) After the battery in the cabinet enters the standby power supply service state, the electric quantity of the battery in the cabinet is controlled to be relatively balanced, so as to prolong the standby power supply time in the high-power external energy site standby power supply scene; (3) The battery replacement cabinet transfers the electric quantity of the low electric quantity battery to the high electric quantity battery based on the battery replacement control strategy, increases the number of replaceable batteries, and meets the battery replacement demand of the user in the battery replacement peak period.

[0015] Other features and advantages of the application will be described in the following description, and some will become apparent from the description, or will be understood by those skilled in the art. The purpose and other advantages of the application can be achieved and obtained by the structure indicated in the specification, claims and drawings. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0017] Figure 1 The flowchart of the energy storage and standby power supply method of the battery replacement cabinet in the embodiment of the application; Figure 2 The schematic diagram of the electric quantity balancing principle in the embodiment of the application; Figure 3 The schematic diagram of the energy storage and discharge principle in the embodiment of the application; Figure 4 The schematic diagram of the battery replacement control principle in the embodiment of the application. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0019] The first embodiment of the present application discloses a method for energy storage and standby power supply of a battery swap cabinet, as shown in the figure, the method comprises the following steps: Figure 1 The method comprises the following steps: S1, after the power grid is powered off, it is judged whether the battery swap cabinet is currently in a non-battery swap peak period; In this step, the main control board of the battery swap cabinet can judge whether the current is in a non-battery swap peak period according to the collected historical battery swap data of the battery swap cabinet. The non-battery swap peak period can be understood as that the battery swap cabinet does not participate in battery swap business or the battery swap frequency is significantly lower than the average level within a certain time.

[0020] S2, if yes, based on the power balance instruction, discharging the in-cabinet battery with initial power higher than the preset power threshold, and charging the in-cabinet battery with initial power lower than the preset power threshold, until the power of the in-cabinet battery of the battery swap cabinet reaches a relatively balanced state; S3, based on the energy storage discharge instruction, controlling all in-cabinet batteries to enter a discharge state, and discharging all in-cabinet batteries as standby power supply to the external energy site connected to the battery swap cabinet.

[0021] According to the embodiment of the present application, if the battery swap cabinet is currently in a non-battery swap peak period after the power grid is powered off, the main control board of the battery swap cabinet switches the battery swap cabinet from the battery swap business state to the energy storage standby power supply business state based on the control instruction configured locally or remotely, and uses the batteries in the battery swap cabinet (including the batteries reaching the battery swap threshold and the batteries not reaching the battery swap threshold) as standby power supply to discharge the external energy site connected to the battery swap cabinet, thereby improving the battery utilization efficiency of the battery swap cabinet and providing standby power support for the external energy site in emergency. Considering that the load power required by the external energy site may be large, and the power output by a single battery is limited, in order to ensure that the battery swap cabinet supplies power to the external energy site for as long as possible, in the embodiment of the present application, the power of all in-cabinet batteries is controlled to reach a relatively balanced state after the in-cabinet batteries enter the standby power supply business state, so as to prolong the standby power supply time in the large-power external energy site standby power supply scene.

[0022] As shown in the figure, Figure 2As shown, each of the in-cabinet batteries (battery 1, battery 2, battery 3...) is connected to the DC bus of the battery swap cabinet by using a corresponding bidirectional DCDC module. When the power grid is not powered off, the alternating current provided by the upstream power distribution end is converted into direct current or direct voltage by the rectifier power module and then connected to the 48V DC bus in the battery swap cabinet, and each in-cabinet battery is charged from the DC bus through the corresponding bidirectional DCDC module. After the power grid is powered off, the main control board controls the bidirectional DCDC module to realize charging or discharging of the in-cabinet battery connected thereto from the DC bus. The DC bus is also connected to a cabinet control power supply, which is used to power the conventional devices in the battery swap cabinet, including the main control module, the cabinet control module, the fan, the heater, the display screen, etc., to provide basic services of the battery swap cabinet.

[0023] In the embodiment of the application, after the main control board obtains the initial electric quantity of each in-cabinet battery, based on the electric quantity balancing instruction of local configuration or remote control, the in-cabinet battery (battery 3 in Figure 2 ) with an initial electric quantity higher than a preset electric quantity threshold is discharged, the in-cabinet battery (battery 2 in Figure 2 ) with an initial electric quantity lower than the preset electric quantity threshold is charged, and the in-cabinet battery (battery 1 in Figure 2 ) with an initial electric quantity reaching the preset electric quantity threshold is stopped from charging / discharging, until the electric quantity of the in-cabinet battery reaches a relatively balanced state.

[0024] According to a preferred embodiment, the electric quantity of the in-cabinet battery of the battery swap cabinet reaches a relatively balanced state, including: The electric quantity of each in-cabinet battery reaches the preset electric quantity threshold; Or, the electric quantity of a preset number of in-cabinet batteries reaches the preset electric quantity threshold; Or, the electric quantity of a preset proportion of in-cabinet batteries reaches the preset electric quantity threshold.

[0025] In the embodiment of the application, the preset electric quantity threshold is an electric quantity threshold set by comprehensively considering the battery electric quantity in the battery swap cabinet and the load power of the external access energy site, so as to ensure that the energy site can provide relatively stable and reliable standby power discharge service for a long time. Therefore, the first electric quantity threshold can be an accurate battery electric quantity value, or can be understood as a certain battery electric quantity range.

[0026] For example, the main control board in the battery replacement cabinet divides the batteries into three states according to the initial electric quantity of the batteries entering the cabinet and the first electric quantity threshold set in advance: the initial electric quantity reaches the first electric quantity threshold, the initial electric quantity is lower than the first electric quantity threshold, and the initial electric quantity is higher than the first electric quantity threshold. The first electric quantity threshold is set to 40%-60% full charge. The electric quantity balancing control logic of the main control board is: controlling the bidirectional DCDC module to charge the batteries entering the cabinet whose initial electric quantity is lower than the first electric quantity threshold, controlling the bidirectional DCDC module to discharge the batteries entering the cabinet whose initial electric quantity is higher than the first electric quantity threshold, and controlling the bidirectional DCDC module to stop the charging / discharging action of the batteries entering the cabinet whose current electric quantity reaches the first electric quantity threshold, until the electric quantity of each battery entering the cabinet reaches the preset electric quantity threshold, or the electric quantity of a preset number of batteries entering the cabinet reaches the preset electric quantity threshold, or the electric quantity of a preset proportion (for example, 60%-80% of the total number of batteries) of batteries entering the cabinet reaches the preset electric quantity threshold.

[0027] In the embodiment of the application, the external energy site (load) is electrically connected with the DC busbar, as shown in Figure 3 As shown in the figure, after the batteries (including battery 1, battery 2, battery 3...) in the battery cabinet reach the balanced state, based on the energy storage discharge instruction, each battery entering the cabinet discharges to the external energy site by using the DC busbar, and the main control board controls the bidirectional DCDC module to make the corresponding battery discharge to the DC busbar.

[0028] According to a preferred embodiment of the application, when it is judged that the battery replacement cabinet is currently in a battery replacement peak period after the power grid is powered off, a battery replacement control strategy is executed. The battery replacement peak period is relative to a non-battery replacement peak period, and can be understood as a battery replacement frequency of the battery replacement cabinet being higher or significantly higher than the average level within a certain time.

[0029] The battery replacement control strategy includes: After obtaining the initial electric quantity of each battery entering the cabinet, the batteries entering the cabinet whose initial electric quantity is lower than the replaceable electric quantity threshold are sequentially determined as target batteries to be charged in order of electric quantity from high to low; the batteries entering the cabinet whose initial electric quantity is lower than the electric quantity of the target battery to be charged are discharged, and the target battery to be charged is charged, until the electric quantity of the target battery to be charged reaches the replaceable electric quantity threshold.

[0030] For example, as shown in Figure 4 Assuming that the replaceable electric quantity threshold of the battery is 80%, the initial electric quantities of the three groups of batteries in the battery replacement cabinet are 85% (replaceable battery in Figure 4 ), 70% (battery with higher electric quantity in Figure 4 ), and 40% (battery with lower electric quantity in Figure 4In the case of low battery power in the battery, the battery with power greater than or equal to the replaceable battery threshold can be taken out, and the battery with power less than the replaceable battery threshold cannot be taken out. According to the scheme of the embodiment, the first group of batteries can be taken out and do not participate in the replacement regulation. The master control board controls the bidirectional DCDC module 1 to make the first group of batteries actively stop charging / discharging action, controls the bidirectional DCDC module 3 to make the third group of batteries discharge to the DC bus, and controls the bidirectional DCDC module 2 to charge the second group of batteries until the power of the second group of batteries reaches 80%.

[0031] In the embodiment of the application, in the case of power grid outage, the linkage battery replacement cabinet and the external energy site, the battery replacement cabinet can be switched from the battery replacement business state to the standby power business state during the non-battery replacement peak period, which not only improves the utilization efficiency of the battery of the battery replacement cabinet, but also provides standby power support for the external energy site in emergency situations. At the same time, after the battery in the cabinet enters the standby power business state, the power of the battery in the cabinet is controlled to be relatively balanced to ensure that the standby power time is prolonged in the high-power external energy site standby power scene.

[0032] The second embodiment of the application provides a battery replacement cabinet energy storage standby power system, which comprises: The judgment module is used to judge whether the battery replacement cabinet is currently in the battery replacement peak period after the power grid is powered off. The power balance module is used to receive a power balance instruction when the judgment is no, and control the battery in the cabinet with an initial power higher than a preset power threshold to discharge and control the battery in the cabinet with an initial power lower than the preset power threshold to charge based on the power balance instruction until the power of the battery in the cabinet of the battery replacement cabinet reaches a relatively balanced state. The energy storage discharge module is used to receive an energy storage discharge instruction and control all batteries in the cabinet to enter a discharge state based on the energy storage discharge instruction, and discharge the external energy site connected to the battery replacement cabinet as a standby power source.

[0033] In the embodiment of the application, the judgment module, the power balance module and the energy storage discharge module are all arranged on the master control board of the battery replacement cabinet. The master control board judges whether the current is in the non-battery replacement peak period according to the collected historical battery replacement data of the battery replacement cabinet. The non-battery replacement peak period can be understood as that the battery replacement cabinet does not participate in the battery replacement business or the battery replacement frequency is significantly lower than the average level within a certain time.

[0034] If the power cabinet is currently in a non-battery replacement peak period after the city power grid is powered off, the main control board of the battery replacement cabinet switches the battery replacement cabinet from a battery replacement service state to a standby power service state based on a local configuration or a remote control instruction, and uses the batteries in the battery replacement cabinet (including batteries reaching a battery replacement threshold and batteries not reaching the battery replacement threshold) as a backup power supply to discharge the external energy site connected to the battery replacement cabinet, thereby improving the battery utilization efficiency of the battery replacement cabinet and providing standby power support for the external energy site in an emergency. Considering that the load power required by the external energy site may be large, and the power output by a single battery is limited, to ensure that the battery replacement cabinet can supply power to the external energy site for as long as possible, in the embodiment of the application, after the battery replacement cabinet enters the standby power service state, the battery replacement cabinet is controlled to reach a relatively balanced state, so as to prolong the standby power time in the standby power scene of the external energy site with large power.

[0035] Each of the battery replacement cabinets is connected to a direct current busbar of the battery replacement cabinet by using a corresponding bidirectional DCDC module. When the city power grid is not powered off, the alternating current provided by the upstream power distribution end is converted into direct current or direct voltage by the rectifier power module and then connected to the 48V direct current busbar in the battery replacement cabinet. The direct current busbar uses the bidirectional DCDC charging module to charge each battery replacement cabinet. After the city power grid is powered off, the main control board controls the bidirectional DCDC module to charge or discharge the battery replacement cabinet connected thereto from or to the direct current busbar.

[0036] In the embodiment of the application, after the main control board obtains the initial power of each battery replacement cabinet, the power balancing module controls the battery replacement cabinet with an initial power higher than a preset power threshold to discharge, controls the battery replacement cabinet with an initial power lower than the preset power threshold to charge, and controls the battery replacement cabinet with a power reaching the preset power threshold to stop charging / discharging, until the power of the battery replacement cabinet reaches a relatively balanced state.

[0037] According to a preferred embodiment, the power of the battery replacement cabinet in the battery replacement cabinet reaches a relatively balanced state, including: The power of each battery replacement cabinet reaches the preset power threshold; Or, the power of a preset number of battery replacement cabinets reaches the preset power threshold; Or, the power of a preset proportion of battery replacement cabinets reaches the preset power threshold.

[0038] In the embodiment of the application, the preset power threshold is a power threshold set by comprehensively considering the battery power in the battery replacement cabinet and the load power of the external connected energy site, so as to ensure that the energy site can be provided with relatively stable and reliable standby power discharge service for a long time. Therefore, the first power threshold can be an accurate battery power value, or can be understood as a certain battery power range.

[0039] For example, the main control board in the battery replacement cabinet divides the batteries into three states according to the initial electric quantity of the batteries entering the cabinet and the first electric quantity threshold: the initial electric quantity is lower than the first electric quantity threshold, the initial electric quantity is higher than the first electric quantity threshold, and the initial electric quantity reaches the first electric quantity threshold. For example, the first electric quantity threshold is set to 40%-60% full charge. The electric quantity balancing control logic of the main control board is: controlling the batteries entering the cabinet with the initial electric quantity lower than the first electric quantity threshold to be charged, controlling the batteries entering the cabinet with the initial electric quantity higher than the first electric quantity threshold to be discharged, and controlling the batteries entering the cabinet with the electric quantity reaching the first electric quantity threshold to stop charging / discharging actions, until the electric quantity of each battery entering the cabinet reaches the preset electric quantity threshold, or the electric quantity of a preset number of batteries entering the cabinet reaches the preset electric quantity threshold, or the electric quantity of a preset proportion (for example, 60%-80% of the total number of batteries) of batteries entering the cabinet reaches the preset electric quantity threshold.

[0040] In the embodiment of the application, the external energy station is electrically connected with the DC busbar. After the batteries entering the cabinet reach the balanced state, based on the energy storage discharge instruction, the main control board controls each battery entering the cabinet to discharge to the external energy station by using the DC busbar.

[0041] According to a preferred embodiment of the application, after the power grid is powered off, if the main control board determines that the battery replacement cabinet is currently in a battery replacement peak period, the energy storage discharge module executes a battery replacement control strategy. The battery replacement peak period is relative to a non-battery replacement peak period, and can be understood as a period in which the battery replacement frequency of the battery replacement cabinet is higher or significantly higher than the average level.

[0042] The battery replacement control strategy includes: After obtaining the initial electric quantity of each battery entering the cabinet, the batteries entering the cabinet with the initial electric quantity lower than the replaceable electric quantity threshold are sequentially determined as target batteries to be charged in descending order of electric quantity. The batteries entering the cabinet with the initial electric quantity lower than the electric quantity of the target batteries to be charged are controlled to be discharged, and the target batteries to be charged are controlled to be charged, until the electric quantity of the target batteries to be charged reaches the replaceable electric quantity threshold.

[0043] For example, it is assumed that the initial electric quantities of four groups of batteries in the battery replacement cabinet are 85%, 70% and 40% respectively, and the replaceable electric quantity threshold of the batteries is 80%. The batteries with the electric quantity greater than or equal to the replaceable electric quantity threshold can be taken out, and the batteries with the electric quantity less than the replaceable electric quantity threshold cannot be taken out. According to the scheme of the embodiment, the first group of batteries can be taken out and do not participate in the battery replacement control. The main control board controls the first group of batteries to stop charging / discharging actions, controls the third group of batteries to discharge to the DC busbar, and controls the second group of batteries to be charged until the electric quantity of the second group of batteries reaches 80%.

[0044] Based on the same inventive concept, the embodiment of the present application further provides an electronic device, comprising a memory and a processor, wherein the processor is configured to read and execute a computer program stored in the memory to realize the energy storage and standby power of the battery swap cabinet.

[0045] Based on the same inventive concept, the embodiment of the present application further provides a computer storage medium, wherein the computer storage medium stores computer executable instructions, and the computer executable instructions realize the energy storage and standby power of the battery swap cabinet when executed.

[0046] In several embodiments provided in the present application, it should be understood that the disclosed apparatus and method can be implemented by other manners. For example, the apparatus embodiment described above is only illustrative, for example, the division of the modules is only a logical function division, and actual implementation can have another division manner, for example, a plurality of modules or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the displayed or discussed modules can be indirect coupling or communication connection through some interfaces, apparatuses or modules, and can be electrical, mechanical or other forms.

[0047] The modules described as separate components can or can not be physically separated, and the components displayed as modules can or can not be physical modules, that is, they can be located in one place or distributed on a plurality of network modules. Part or all of the modules can be selected according to actual needs to achieve the purpose of the embodiment scheme. In addition, the function modules in each embodiment of the present application can be integrated in one processing module, or each module can exist physically, or two or more modules can be integrated in one module. The integrated module can be realized in the form of hardware or in the form of software function module.

[0048] The integrated module, if realized in the form of software function module and sold or used as an independent product, can be stored in a computer readable storage medium. Based on such understanding, the technical scheme of the present application or the part of the present application which is essential or contributes to the prior art or the whole or part of the technical scheme can be embodied in the form of software product, which is stored in a storage medium and includes a plurality of instructions for making a computer device (which can be a personal computer, a server or a network device, etc.) execute all or part of the steps of the method described in each embodiment of the present application. The foregoing storage medium includes a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk and various program code storage media.

[0049] It should be noted that, for the foregoing method embodiments, the purposes of brief description, they are all expressed as a series of action combinations, but those skilled in the art should know that the present application is not limited to the order of the actions described, because according to the present application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily essential to the present application.

[0050] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments. Finally, it should be pointed out that: the above only describes the preferred embodiments of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacements for some of the technical features, as long as they are within the spirit and principles of the present application. Any modification, equivalent replacement, improvement, etc. shall be included in the protection scope of the present application.

Claims

1. A battery replacement cabinet energy storage power backup method, characterized in that, The method comprises: After the mains power grid is powered off, it is judged whether the battery swap cabinet is currently in a non-battery swap peak period; If yes, based on an electricity balance instruction, the battery swap cabinet is controlled to discharge the in-cabinet batteries with an initial electricity higher than a preset electricity threshold and to charge the in-cabinet batteries with an initial electricity lower than the preset electricity threshold until the electricity of the in-cabinet batteries of the battery swap cabinet reaches a relatively balanced state; Based on an energy storage discharge instruction, all the in-cabinet batteries are controlled to enter a discharging state, and all the in-cabinet batteries are used as standby power sources to discharge an external energy site connected to the battery swap cabinet.

2. The method of claim 1, wherein, Each of the in-cabinet batteries is connected to a DC bus of the battery swap cabinet by using a corresponding bidirectional DC / DC module, and the in-cabinet battery connected to the DC bus is charged from the DC bus or discharged to the DC bus by controlling the bidirectional DC / DC module.

3. The method of claim 1, wherein, Based on the electricity balance instruction, the in-cabinet batteries with the electricity reaching the preset electricity threshold are controlled to stop charging / discharging.

4. The method according to claim 1 or 3, characterized in that, The electricity of the in-cabinet batteries of the battery swap cabinet reaches a relatively balanced state, which comprises: The electricity of each in-cabinet battery reaches the preset electricity threshold; Or, the electricity of a preset number of in-cabinet batteries reaches the preset electricity threshold; Or, the electricity of a preset proportion of in-cabinet batteries reaches the preset electricity threshold.

5. The method of claim 2, wherein, The external energy site is electrically connected to the DC bus; Based on the energy storage discharge instruction, each of the in-cabinet batteries discharges the external energy site by using the DC bus.

6. The method of claim 1, wherein, The method further comprises: After the mains power grid is powered off, if it is judged that the battery swap cabinet is currently in a battery swap peak period, a battery swap regulation strategy is executed; The battery swap regulation strategy comprises: In-cabinet batteries with an initial electricity lower than a replaceable electricity threshold are sequentially determined as target batteries to be charged in order of the electricity from high to low; In-cabinet batteries with an initial electricity lower than the electricity of the target battery to be charged are controlled to discharge, and the target battery to be charged is controlled to charge until the electricity of the target battery to be charged reaches the replaceable electricity threshold.

7. A battery replacement cabinet energy storage power backup system, characterized in that, The system comprises: A judgment module is configured to judge whether the battery swap cabinet is currently in a non-battery swap peak period after the mains power grid is powered off; An electricity balance module is configured to, when it is judged that the battery swap cabinet is currently in a non-battery swap peak period, receive an electricity balance instruction and control in-cabinet batteries with an initial electricity higher than a preset electricity threshold to discharge and control in-cabinet batteries with an initial electricity lower than the preset electricity threshold to charge based on the electricity balance instruction until the electricity of the in-cabinet batteries of the battery swap cabinet reaches a relatively balanced state; An energy storage discharge module is configured to receive an energy storage discharge instruction and control all the in-cabinet batteries to enter a discharging state based on the energy storage discharge instruction, and discharge an external energy site connected to the battery swap cabinet by using all the in-cabinet batteries as standby power sources.

8. The system of claim 7, wherein, The electricity of the in-cabinet batteries of the battery swap cabinet reaches a relatively balanced state, which comprises: The electricity of each in-cabinet battery reaches the preset electricity threshold; Or, the electricity of a preset number of in-cabinet batteries reaches the preset electricity threshold; Or, the electricity of a preset proportion of in-cabinet batteries reaches the preset electricity threshold.

9. The system of claim 7, wherein, The system further comprises: A battery swap regulation module is configured to, when the judgment module judges that the battery swap cabinet is currently in a battery swap peak period, execute a battery swap regulation strategy; The battery swap regulation strategy comprises: The battery in the cabinet with initial electric quantity lower than the replaceable threshold is determined as a target battery to be charged in order of electric quantity from high to low; The other batteries in the cabinet with initial electric quantity lower than the electric quantity of the target battery to be charged are controlled to be discharged, and the target battery to be charged is charged until the electric quantity of the target battery to be charged reaches the replaceable threshold.

10. A computer-readable storage medium, characterized in that, The computer readable storage medium stores computer executable instructions, and the computer executable instructions implement the method in any one of claims 1-6 when executed.

Images