Energy storage cabinet test system

Abstract

The utility model provides an energy storage cabinet test system, which is applied to the field of energy storage cabinets and comprises a power supply module. The first end of the alternating-current test branch is connected with the power module, and the second end is connected with the alternating-current cabinet; one end of the first switch piece is connected with the power supply module, and the other end of the first switch piece is connected with the first end of the alternating current test branch; the first end of the direct-current test branch is connected with the power module, and the second end is connected with the direct-current cabinet; one end of the second switch piece is connected with the power supply module, and the other end of the second switch piece is connected with the first end of the direct current test branch; the control module is respectively connected with the first switch piece, the second switch piece, the alternating current test branch, the direct current test branch, the alternating current cabinet and the direct current cabinet; according to the invention, the power supply module is connected into the energy storage cabinet test system, so that the resource occupancy rate in the test process can be effectively reduced.

Description

Technical Field

[0001] The present application relates to the technical field of energy storage cabinets, and in particular to an energy storage cabinet testing system. Background Art

[0002] The performance of the energy storage batteries in the energy storage cabinet is crucial to the normal operation of the energy storage cabinet, and it is essential to test the energy storage cabinet before it leaves the factory.

[0003] In the related art, the energy storage cabinet to be tested is connected to the regional power system of the manufacturer, and the regional power system is used to perform capacity testing and cyclic charge and discharge testing on the energy storage cabinet.

[0004] However, the above energy storage cabinet test system has a high resource usage rate. Summary of the invention

[0005] Based on this, it is necessary to provide an energy storage cabinet testing system with low resource occupancy to address the above problems.

[0006] In a first aspect, the present application provides an energy storage cabinet testing system, which adopts the following technical solution:

[0007] An energy storage cabinet testing system, comprising:

[0008] Power module;

[0009] An AC test branch, wherein a first end of the AC test branch is connected to a power module, a second end is connected to an AC cabinet of an energy storage cabinet to be tested, and a third end is connected to a control module; and a first switch is connected between the AC test branch and the power module, wherein one end of the first switch is connected to the power module, and the other end is connected to the first end of the AC test branch;

[0010] A DC test branch, wherein a first end of the DC test branch is connected to a power module, a second end is connected to a DC cabinet of an energy storage cabinet to be tested, and a third end is connected to a control module; and a second switch is connected between the DC test branch and the power module, wherein one end of the second switch is connected to the power module, and the other end is connected to the first end of the DC test branch; and:

[0011] A control module, connected to the first switch component, the second switch component, the AC test branch, the DC test branch, the AC cabinet and the DC cabinet respectively;

[0012] Among them, the battery capacity of the power module is greater than the battery capacity of each of the energy storage cabinets to be tested; the AC cabinet includes a first battery manager, the DC cabinet includes a second battery manager, and the control module is respectively communicated and connected to the first battery manager and the second battery manager; the first battery manager can generate an AC test instruction, and the second battery manager can generate a DC test instruction; the control module can receive the AC test instruction to control the first switch element to start the AC test branch, and can receive the DC test instruction to control the second switch element to start the DC test branch.

[0013] In some embodiments, the AC cabinet also includes a first battery group, the first battery manager is communicatively connected to the first battery group, and can obtain first information of the first battery group; the DC cabinet also includes a second battery group, the second battery manager is communicatively connected to the second battery group, and can obtain second information of the second battery group; the control module can obtain the first information and the second information.

[0014] In some embodiments, the first information includes at least one of the voltage, current, charge, temperature and power of the first battery pack, and the second information includes at least one of the voltage, current, charge, temperature and power of the second battery pack.

[0015] In some embodiments, the control module is connected to the first battery manager via a CAN bus communication, and the control module is connected to the second battery manager via a CAN bus communication.

[0016] In some embodiments, the AC test branch includes an energy storage inverter, a first end of the energy storage inverter is connected to the power module, a second end of the energy storage inverter is connected to the AC cabinet, and a control end of the energy storage inverter is connected to the control module.

[0017] In some embodiments, the DC test branch includes a DC converter, a first end of the DC converter is connected to the power module, a second end of the DC converter is connected to the DC cabinet, and a control end of the DC converter is connected to the control module.

[0018] In some embodiments, the energy storage cabinet testing system further includes: an external branch, a first end of the external branch is connected to the AC cabinet, and a second end of the external branch is connected to a regional power system.

[0019] In some embodiments, the control module is communicatively connected to the power module, can obtain power status information of the power module, and control the on / off status of the external branch and the regional power system based on the power status information, so that the AC cabinet is connected or disconnected from the regional power system.

[0020] In some embodiments, the control module is communicatively connected to the power module; the AC test instruction includes a first charge and discharge test instruction, and the DC test instruction includes a second charge and discharge test instruction. The control module can determine the charge and discharge test sequence of each energy storage cabinet to be tested based on the received multiple first charge and discharge instructions and / or the second charge and discharge instructions and the power of the power module.

[0021] In some embodiments, the battery capacity of the power module is greater than the sum of the battery capacity of any one of the AC cabinets and the battery capacity of any one of the DC cabinets.

[0022] The energy storage cabinet test system includes a power module; an AC test branch, a first end of the AC test branch is connected to the power module, a second end is connected to the AC cabinet of the energy storage cabinet to be tested, and a third end is connected to the control module; and a first switch is connected between the AC test branch and the power module, one end of the first switch is connected to the power module, and the other end is connected to the first end of the AC test branch; a DC test branch, a first end of the DC test branch is connected to the power module, a second end is connected to the DC cabinet of the energy storage cabinet to be tested, and a third end is connected to the control module; and a second switch is connected between the DC test branch and the power module, one end of the second switch is connected to the power module, and the other end is connected to the first end of the DC test branch; and A control module is respectively connected to the first switch element, the second switch element, the AC test branch, the DC test branch, the AC cabinet and the DC cabinet; wherein the battery capacity of the power module is greater than the battery capacity of each of the energy storage cabinets to be tested; the AC cabinet includes a first battery manager, the DC cabinet includes a second battery manager, and the control module is respectively communicatively connected to the first battery manager and the second battery manager; the first battery manager can generate an AC test instruction, and the second battery manager can generate a DC test instruction; the control module can receive the AC test instruction to control the first switch element to start the AC test branch, and can receive the DC test instruction to control the second switch element to start the DC test branch.

[0023] In the process of testing the energy storage cabinet to be tested using the energy storage cabinet testing system provided in the present application, the control module is used to start the test branch to control the power module to be connected to the AC cabinet or DC cabinet of the energy storage cabinet to be tested. When the power module is connected to the energy storage cabinet to be tested through the test branch and is in a connected state, the power module can exchange power with the AC cabinet or DC cabinet of the energy storage cabinet to be tested, thereby performing charging and discharging tests on the AC cabinet or DC cabinet to verify the capacity, efficiency, stability and charge and discharge cycle life of the energy storage cabinet to be tested, thereby avoiding the use of the power system of the production plant as a power module in the traditional energy storage cabinet testing system, which affects the components and power quality in the power system of the production plant during the testing of the energy storage cabinet to be tested.

[0024] In the present application, by respectively arranging a first switch element and a second switch element between the AC test branch and the DC test branch and the power module, and controlling the closing of the first switch element or the second switch element through an AC or DC test instruction, the AC test branch and the DC test branch in the energy storage cabinet test system can selectively or simultaneously perform AC testing and DC testing, and when the first switch element or the second switch element is disconnected, the power module no longer supplies power to the AC test branch and the DC test branch, thereby reducing the power consumption of the two branches when not testing, thereby effectively reducing the resource occupancy rate during the test process. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a structural schematic diagram of an energy storage cabinet testing system in one embodiment;

[0026] Figure 2 A schematic diagram of the connection relationship of a test branch in an embodiment;

[0027] Figure 3 A schematic diagram of the connection relationship of the test branch in another embodiment;

[0028] Figure 4 A schematic diagram of the connection relationship of an external branch in an embodiment;

[0029] Notes on the attached drawings:

[0030] 1. Power module; 21. AC test branch; 211. Energy storage converter; 22. DC test branch; 221. DC converter; 23. Power distribution cabinet; 3. Control module; 4. Energy storage cabinet to be tested; 41. AC cabinet; 411. First battery manager; 412. First battery pack; 42. DC cabinet; 421. Second battery manager; 422. Second battery pack; 5. Regional power system; 61. First switch; 62. Second switch. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0032] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0033] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0034] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0035] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0036] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0037] The following is combined with Figure 1-4 The embodiments of the present application are described in further detail.

[0038] See also Figure 1 , Figure 1 The schematic diagram of the structure of the energy storage cabinet test system in one embodiment of the present application is shown. The energy storage cabinet test system provided in one embodiment of the present application includes: a power supply module 1, an AC test branch 21, the first end of the AC test branch 21 is connected to the power supply module 1, the second end is connected to the AC cabinet 41 of the energy storage cabinet 4 to be tested, and the third end is connected to the control module 3; and a first switch 61 is connected between the AC test branch 21 and the power supply module 1, one end of the first switch 61 is connected to the power supply module 1, and the other end is connected to the first end of the AC test branch 21; a DC test branch 22, the first end of the DC test branch 22 is connected to the AC test branch 21; The power module 1 is connected, the second end is connected to the DC cabinet 42 of the energy storage cabinet 4 to be tested, and the third end is connected to the control module 3; and a second switch 62 is connected between the DC test branch 22 and the power module 1, one end of the second switch 62 is connected to the power module 1, and the other end is connected to the first end of the DC test branch 22; and the control module 3 is respectively connected to the first switch 61, the second switch 62, the AC test branch 21, the DC test branch 22, the AC cabinet 41 and the DC cabinet 42;

[0039] Among them, the battery capacity of the power supply module 1 is greater than the battery capacity of each of the energy storage cabinets 4 to be tested; the AC cabinet 41 includes a first battery manager 411, the DC cabinet 42 includes a second battery manager 421, and the control module 3 is respectively communicated and connected to the first battery manager 411 and the second battery manager 421; the first battery manager 411 can generate an AC test instruction, and the second battery manager 421 can generate a DC test instruction; the control module 3 can receive the AC test instruction to control the first switch 61 to start the AC test branch 21, and can receive the DC test instruction to control the second switch 62 to start the DC test branch 22.

[0040] The energy storage cabinet 4 to be tested includes an AC cabinet 41 and a DC cabinet 42. In actual application scenarios, the AC cabinet 41 is used to connect to a power grid or an AC load, and the DC cabinet 42 is used to connect to a battery pack or a DC load.

[0041] Optionally, the power module 1 can be adaptively selected according to the type and specification of the energy storage cabinet 4 to be tested. Exemplarily, the power module 1 can be a large-capacity battery to be able to perform charging or discharging tests on the DC cabinet 42 or the AC cabinet 41; specifically, the battery capacity of the power module 1 is greater than the sum of the battery capacity of any of the AC cabinets 41 and the battery capacity of any of the DC cabinets 42, so as to be able to meet the full charging and full discharging of the energy storage cabinet 4 to be tested.

[0042] Optionally, the control module 3 may be a programmable logic controller PLC, a central processing unit CPU or a microcontroller MCU.

[0043] In the process of testing the energy storage cabinet 4 to be tested using the energy storage cabinet testing system provided in the present application, the control module 3 is used to start the test branch to control the power module 1 to be connected to the AC cabinet 41 or the DC cabinet 42 of the energy storage cabinet 4 to be tested. When the power module 1 is connected to the energy storage cabinet 4 to be tested through the test branch and is in a connected state, the power module 1 can exchange power with the AC cabinet 41 or the DC cabinet 42 of the energy storage cabinet 4 to be tested, thereby performing charging and discharging tests on the AC cabinet 41 or the DC cabinet 42 to verify the capacity, efficiency, stability and charge and discharge cycle life of the energy storage cabinet 4 to be tested, thereby avoiding the situation in which the power system of the production plant is used as the power module 1 in the traditional energy storage cabinet testing system, and the components and power quality in the power system of the production plant are affected during the testing of the energy storage cabinet 4 to be tested.

[0044] In the present application, a first switch 61 and a second switch 62 are respectively provided between the AC test branch 21 and the DC test branch 22 and the power module 1, and the closing of the first switch 61 or the second switch 62 is controlled by an AC or DC test instruction. The AC test branch 21 and the DC test branch 22 in the energy storage cabinet test system can selectively or simultaneously perform AC testing and DC testing. When the first switch 61 or the second switch 62 is disconnected, the power module 1 no longer supplies power to the AC test branch 21 and the DC test branch 22, thereby reducing the power consumption of the two branches when not testing, thereby effectively reducing the resource occupancy rate during the test process.

[0045] Figure 2 The schematic diagram of the connection relationship between the AC test branch 21 and the DC test branch 22 in one embodiment of the present application is shown. In the energy storage cabinet test system provided in one embodiment of the present application, the power module 1 is a battery capable of providing a stable DC power supply. Figure 2 The AC test branch 21 in the energy storage cabinet test system includes: an energy storage converter 211 (Power Conversion System, PCS), a first end of the energy storage converter 211 is connected to the power module 1, a second end of the energy storage converter 211 is connected to the AC cabinet 41, and a control end of the energy storage converter 211 is connected to the control module 3.

[0046] A first switch element 61 is connected between the energy storage converter 211 and the power module 1 , one end of the first switch element 61 is connected to the power module 1 , and the other end is connected to a first end of the energy storage converter 211 .

[0047] During the test of the energy storage cabinet 4 to be tested, the control module 3 controls the start and stop of the energy storage inverter 211, thereby controlling the on and off of the AC test branch 21. When the AC test branch 21 is in the on state, on the one hand, the control module 3 can control the energy storage inverter 211 to convert the DC power output by the power module 1 into AC power of preset amplitude and frequency, and transmit the converted AC power to the AC cabinet 41 to perform a charging test on the AC cabinet 41; on the other hand, the control module 3 can control the energy storage inverter 211 to convert the AC power output by the AC cabinet 41 into DC power, and transmit the converted DC power to the power module 1 for storage, and perform a discharge test on the AC cabinet 41.

[0048] The DC test branch 22 in the energy storage cabinet test system includes a DC converter 221 (Direct Current to Direct Current Converter, DCDC), the first end of the DC converter 221 is connected to the power module 1, the second end of the DC converter 221 is connected to the DC cabinet 42, and the control end of the DC converter 221 is connected to the control module 3.

[0049] Among them, a second switch 62 is connected between the DC converter 221 and the power module 1, one end of the second switch 62 is connected to the power module 1, and the other end is connected to the first end of the DC converter 221. The DC converter 221 is a high-frequency power conversion device, which mainly uses a switching device, such as a field effect transistor or a triode, to achieve pulse modulation of the input voltage by periodically controlling the switching of the switching device, thereby achieving voltage conversion and automatic voltage stabilization functions. Optionally, the DC converter 221 can be a Buck step-down type, a Boost step-up type, or a Buck-boost step-down step-up type. During the test of the energy storage cabinet 4 to be tested, the control module 3 controls the start and stop of the DC converter 221, thereby controlling the on and off of the DC test branch 22. When the DC test branch 22 is in the on state, on the one hand, the control module 3 can control the DC converter 221 to convert the DC power output by the power module 1 into DC power with a preset voltage amplitude, and transmit the converted DC power to the DC cabinet 42 to perform a charging test on the DC cabinet 42; on the other hand, the control module 3 can control the DC converter 221 to convert the DC power output by the DC cabinet 42 into DC power that can be stored by the power module 1, and transmit the converted DC power to the power module 1 for storage, and perform a discharge test on the DC cabinet 42.

[0050] In this embodiment, an energy storage inverter 211 is provided in the AC test branch 21, and a DC converter 221 is provided in the DC test branch 22, so that different energy storage cabinet operating conditions can be simulated during the test of the energy storage cabinet 4 to be tested, thereby comprehensively testing the performance of the energy storage cabinet 4 to be tested in different application scenarios; and the energy storage inverter 211 and the DC converter 221 can accurately and efficiently adjust the voltage and current, thereby improving the control accuracy, reducing the power loss, and improving the energy utilization rate and the test efficiency during the test process.

[0051] Continue reading Figure 2 In the energy storage cabinet test system provided in an embodiment of the present application, the control module 3 is connected to the first battery manager 411 and the control module 3 is connected to the second battery manager 421 via a CAN (Controller Area Network) bus. In a possible implementation, the control module 3 is also connected to the energy storage converter 211 and the DC converter 221 via a CAN bus.

[0052] Optionally, the first battery manager 411 or the second battery manager 421 may pre-store a test program of the corresponding AC cabinet 41 or DC cabinet 42. When the AC cabinet 41 needs to be tested, the first battery manager 411 sends an AC test instruction to the control module 3 based on the test program. The control module 3 determines the control scheme according to the AC test instruction and sends a control instruction to the energy storage converter 211 in the AC test branch 21 to control the start of the corresponding AC test branch 21. When the DC cabinet 42 needs to be tested, the second battery manager 421 sends a DC test instruction to the control module 3 based on the test program. The control module 3 determines the control scheme according to the DC test instruction and sends a control instruction to the DC converter 221 to control the start of the corresponding DC test branch 22.

[0053] In a possible embodiment, the AC cabinet 41 also includes a first battery group 412, the first battery manager 411 is communicatively connected to the first battery group 412, and can obtain first information of the first battery group 412; the DC cabinet 42 also includes a second battery group 422, the second battery manager 421 is communicatively connected to the second battery group 422, and can obtain second information of the second battery group 422; the control module 3 can obtain the first information and the second information.

[0054] Optionally, the first information includes at least one of the voltage, current, charge, temperature and power of the first battery pack 412 , and the second information includes at least one of the voltage, current, charge, temperature and power of the second battery pack 422 .

[0055] Optionally, the first battery manager 411 or the second battery manager 421 is also used to compare the collected first information or second information with a preset normal state interval, and generate an alarm message when the first information or the second information does not conform to the normal state interval, so that the operator can repair the energy storage cabinet test system or the first battery group 412 or the second battery group 422 corresponding to the alarm information based on the alarm information, so as to prevent the first battery group 412 or the second battery group 422 from being damaged due to overcharging or over-discharging during the test process or use, thereby ensuring the safety of the energy storage cabinet 4 to be tested.

[0056] In this embodiment, the first battery manager 411 is communicatively connected to the first battery group 412, the second battery manager 421 is communicatively connected to the second battery group 422, and the control module 3 is communicatively connected to the first battery manager 411 and the second battery manager 421. The control module 3 can determine the charge and discharge time or the charge and discharge power according to the first information or the second information, and control the corresponding AC test branch 21 or DC test branch 22 based on the charge and discharge time and the charge and discharge power to prevent over-charge and discharge, so as to ensure the safety and stability of the energy storage cabinet test system and the energy storage cabinet 4 to be tested.

[0057] In a possible implementation, Figure 3 As shown, the energy storage cabinet 4 to be tested includes a plurality of AC cabinets 41 and / or a plurality of DC cabinets 42 .

[0058] The control module 3 may receive multiple AC test instructions and first information sent by the first battery manager 411, and / or DC test instructions and second information sent by the second battery manager 421. The control module 3 determines the control instruction according to the received test instructions and information, and starts the energy storage inverter 211 or the DC converter 221 according to the control instruction, and controls and adjusts the working state of the energy storage inverter 211 or the DC converter 221 according to the control instruction.

[0059] In a possible implementation, the control module 3 is communicatively connected to the power module 1; the AC test instruction includes a first charge and discharge test instruction, and the DC test instruction includes a second charge and discharge test instruction. The control module 3 can determine the charge and discharge test sequence of each energy storage cabinet 4 to be tested based on the received multiple first charge and discharge instructions and / or the second charge and discharge instructions and the power of the power module 1.

[0060] Exemplarily, the control module 3 receives multiple first charge and discharge instructions and / or the second charge and discharge instructions. When the power of the power module 1 is less than a preset power threshold, the control module 3 first starts the test branch corresponding to the first charge and discharge instruction of the discharge type and / or the second charge and discharge instruction, and replenishes the power of the power module 1 while testing; then starts the test branch corresponding to the first charge and discharge instruction of the charging type and / or the second charge and discharge instruction, to ensure that the power module 1 can provide enough power for the charging type test. When the power of the power module 1 is greater than or equal to the preset power threshold, first start the test branch corresponding to the first charge and discharge instruction of the charging type and / or the second charge and discharge instruction, and then start the test branch corresponding to the first charge and discharge instruction of the discharge type and / or the second charge and discharge instruction, to avoid power overflow of the power module 1.

[0061] Specifically, the first charge and discharge instruction may include a first charge instruction and a first discharge instruction. When the control module 3 receives multiple first charge instructions and multiple first discharge instructions, it can determine whether to execute multiple first charge instructions or multiple first discharge instructions simultaneously according to the power level of the power module 1. For example, when the power level of the power module 1 is sufficient, multiple corresponding AC cabinets 41 can be charged simultaneously; when the power level of the power module 1 is insufficient, multiple AC cabinets 41 can be discharged simultaneously to increase the power level of the power module 1 quickly for charging testing; or when the power level of the power module 1 is insufficient to charge or discharge multiple AC cabinets 41 at the same time, some AC cabinets 41 are charged and tested, and the remaining AC cabinets 41 are discharged. In this way, the test sequence can be reasonably arranged according to the power level of the power module 1 to ensure the test requirements and improve the test efficiency.

[0062] Similarly, the second charge and discharge instruction may include a second charge instruction and a second discharge instruction. When the control module 3 receives multiple second charge instructions and multiple second discharge instructions, it can determine whether to execute multiple second charge instructions or multiple second discharge instructions simultaneously according to the power of the power module 1. For example, when the power of the power module 1 is sufficient, multiple corresponding DC cabinets 42 can be charged simultaneously; when the power of the power module 1 is insufficient, multiple DC cabinets 42 can be discharged simultaneously to quickly increase the power of the power module 1 for charging testing; or when the power of the power module 1 is insufficient to charge or discharge multiple DC cabinets 42 at the same time, a charging test is performed on some AC cabinets 41, and a discharge test is performed on the remaining AC cabinets 41.

[0063] Of course, when the charge and discharge instructions received by the control module 3 include both the first charge and discharge instructions and the second charge and discharge instructions, that is, the control module 3 simultaneously receives multiple first charge instructions and / or multiple first discharge instructions and multiple second charge instructions and / or multiple second discharge instructions, the control module 3 can control the first switch element 61 and the second switch element 62 to close, so that the AC test branch 21 and the DC test branch 22 are started at the same time, and the AC cabinet 41 and the DC cabinet 42 are charged and discharged at the same time.

[0064] Multiple first battery managers 411 respectively monitor the corresponding first battery groups 412 and obtain corresponding first information, and adjust the charging and discharging current or power in time according to the first information. For example, when a first battery group 412 is nearly fully charged, a larger charging current or charging power may damage the batteries of the first battery group 412. The first battery manager 411 can monitor the first information (voltage, current, power, temperature, power and other information) of the first battery group 412 when it is nearly fully charged, and send it to the control module 3. The control module 3 reduces the charging current of the AC test branch 21 according to the above first information, so that the first battery group 412 can slowly reach a full charge state to complete the charging test of the first battery group 412.

[0065] Figure 4 Schematic diagram showing the connection relationship of the external branch in one embodiment of the present application. Figure 4 The energy storage cabinet testing system provided in one embodiment of the present application further includes an external branch, a first end of the external branch is connected to the AC cabinet 41 , and a second end of the external branch is connected to the regional power system 5 .

[0066] Among them, the regional power system 5 is the power system corresponding to the manufacturer of the energy storage cabinet 4 to be tested, and the external branch includes a distribution cabinet 23. The first end of the distribution cabinet 23 is connected to the regional power system 5, and the second end of the distribution cabinet 23 is connected to the AC cabinet 41. The control end of the distribution cabinet 23 is connected to the control module 3. The control module 3 can control the on and off of the external branch according to the status data corresponding to the AC cabinet 41. When the external branch is in the on state, the regional power system 5 and the AC cabinet 41 exchange power.

[0067] In a possible implementation, the control module 3 is communicatively connected with the power module 1, is capable of obtaining the power status information of the power module 1, and controls the on / off status of the external branch and the regional power system 5 according to the power status information, so that the AC cabinet 41 is connected or disconnected with the regional power system 5.

[0068] When the power supply module 1 is insufficient, the control module 3 controls the external branch circuit to be turned on, so that the regional power system 5 and the AC cabinet 41 can exchange power.

[0069] In one embodiment of the present application, the energy storage cabinet test system further includes a thermal management module, an equipment protection module, and a fire protection system, etc. The thermal management module, the equipment protection module, and the fire protection system are respectively connected to the control module 3 for communication.

[0070] In one embodiment, the thermal management module may include an air conditioner and a heater, and the air conditioner and the heater respectively establish RS485 communication with the control module 3. The control module 3 can control the air conditioner and the heater in real time through preset thermal management parameters, thereby adjusting the test environment temperature and realizing constant temperature control of the test environment to improve the reliability of the test.

[0071] In one embodiment, the equipment protection module may include at least one of an emergency stop button, a water immersion sensor, a smoke sensor, a temperature sensor, and a humidity sensor. The emergency stop button, the water immersion sensor, the smoke sensor, the temperature sensor, and the humidity sensor are respectively connected to the control module 3 by electrical I / O points or communication connections.

[0072] Specifically, the control module 3 can make logical judgments based on the collected information of the emergency stop button, water immersion sensor, smoke sensor, temperature sensor, and humidity sensor and the communication status of the electrical I / O point. For example, when the communication between the emergency stop button, water immersion sensor, smoke sensor, temperature sensor, and humidity sensor and the control module 3 is interrupted, the test system stops testing the battery cluster, thereby realizing the hardware protection of the energy storage battery test system, improving the safety of the test, and turning on the corresponding temperature protection, combustible gas protection, water immersion protection, communication interruption protection, and emergency stop protection. Among them, the emergency stop button is set to the highest priority. When the emergency stop button is disconnected, the control module 3 controls the energy storage battery test system to stop running. In addition, the control module 3 can also generate corresponding alarm information corresponding to different communication interruptions for warning.

[0073] The fire protection system may include a fire controller and a fire extinguisher. The fire controller is connected to the smoke sensor and the fire extinguisher through the electrical I / O interface, and determines whether there is combustible gas and the amount of combustible gas based on the data of the smoke sensor. When the smoke sensor detects excessive combustible gas, the fire control gas generates an alarm message and uploads it to the control module 3 to control the test system to stop the test of the energy storage cabinet. At the same time, the fire controller can control the fire extinguisher to spray along the fire pipe to ensure the safety of the test. Specifically, the fire extinguisher can be a heptafluoropropane fire extinguisher.

[0074] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., but are not limited to this.

[0075] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0076] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. An energy storage cabinet testing system, characterized in that: The energy storage cabinet testing system comprises: Power module; An AC test branch, wherein a first end of the AC test branch is connected to the power module, a second end is connected to the AC cabinet of the energy storage cabinet to be tested, and a third end is connected to the control module; and a first switch is connected between the AC test branch and the power module, one end of the first switch is connected to the power module, and the other end is connected to the first end of the AC test branch; a DC test branch, wherein a first end of the DC test branch is connected to the power module, a second end is connected to the DC cabinet of the energy storage cabinet to be tested, and a third end is connected to the control module; and a second switch is connected between the DC test branch and the power module, wherein one end of the second switch is connected to the power module, and the other end is connected to the first end of the DC test branch; and The control module is respectively connected to the first switch component, the second switch component, the AC test branch, the DC test branch, the AC cabinet and the DC cabinet; Among them, the battery capacity of the power module is greater than the battery capacity of each of the energy storage cabinets to be tested; the AC cabinet includes a first battery manager, the DC cabinet includes a second battery manager, and the control module is respectively communicatively connected to the first battery manager and the second battery manager; the first battery manager can generate an AC test instruction, and the second battery manager can generate a DC test instruction; the control module can receive the AC test instruction to control the first switch element to start the AC test branch, and can receive the DC test instruction to control the second switch element to start the DC test branch.

2. The energy storage cabinet testing system according to claim 1, characterized in that: The AC cabinet also includes a first battery group, the first battery manager is communicatively connected to the first battery group, and can obtain first information of the first battery group; the DC cabinet also includes a second battery group, the second battery manager is communicatively connected to the second battery group, and can obtain second information of the second battery group; the control module can obtain the first information and the second information.

3. The energy storage cabinet testing system according to claim 2, characterized in that: The first information includes at least one of the voltage, current, charge, temperature and power of the first battery pack, and the second information includes at least one of the voltage, current, charge, temperature and power of the second battery pack.

4. The energy storage cabinet testing system according to claim 1, characterized in that: The control module is connected to the first battery manager via a CAN bus communication, and the control module is connected to the second battery manager via a CAN bus communication.

5. The energy storage cabinet testing system according to claim 1, characterized in that: The AC test branch includes an energy storage inverter, a first end of the energy storage inverter is connected to the power module, a second end of the energy storage inverter is connected to the AC cabinet, and a control end of the energy storage inverter is connected to the control module.

6. The energy storage cabinet testing system according to claim 1, characterized in that: The DC test branch includes a DC converter, a first end of the DC converter is connected to the power module, a second end of the DC converter is connected to the DC cabinet, and a control end of the DC converter is connected to the control module.

7. The energy storage cabinet testing system according to claim 1, characterized in that: The energy storage cabinet testing system further includes: an external branch, a first end of which is connected to the AC cabinet, and a second end of which is connected to a regional power system.

8. The energy storage cabinet testing system according to claim 7, characterized in that: The control module is communicatively connected with the power module, and can obtain power status information of the power module, and control the on / off status of the external branch and the regional power system according to the power status information, so that the AC cabinet is connected or disconnected from the regional power system.

9. The energy storage cabinet testing system according to claim 1, characterized in that: The control module is communicatively connected with the power module; the AC test instruction includes a first charge and discharge test instruction, and the DC test instruction includes a second charge and discharge test instruction. The control module can determine the charge and discharge test sequence of each energy storage cabinet to be tested according to the received multiple first charge and discharge test instructions and / or the second charge and discharge test instructions and the power of the power module.

10. The energy storage cabinet testing system according to claim 1, characterized in that: The battery capacity of the power module is greater than the sum of the battery capacity of any one of the AC cabinets and the battery capacity of any one of the DC cabinets.

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