Battery system testing method, battery management terminal, storage medium

Abstract

The present invention provides a battery system testing method, a battery management terminal, and a storage medium. The method includes: responding to a test start instruction triggered by an internal or external trigger, determining the phase number of the current battery test task; if the current battery test task is the first phase test, sending a battery test flag to the target power conversion circuit, and selecting a corresponding battery cabinet / battery module based on the test item information in the test start instruction to perform a discharge test; if the current battery test task is not the first phase test, selecting a corresponding battery cabinet / battery module based on the test item information in the test start instruction, adjusting some / all battery cabinets / battery modules that have completed the discharge test to the load corresponding to the current battery test task, and performing the discharge test; responding to a test end instruction triggered by an internal or external trigger, ending the current battery test task and triggering the next phase battery test task or exiting the battery test mode. The present invention can effectively reduce the testing cost of the battery system.

Description

Technical Field

[0001] The present invention belongs to the technical field of battery testing, and more specifically, relates to a battery system testing method, a battery management terminal, and a storage medium. Background Art

[0002] With the continuous development of energy storage technology, batteries have been widely used in various fields. Their performance testing is crucial and directly affects the stable operation of the applied circuits. For example, they can be used in uninterruptible power systems (UPS). UPS generally includes power input circuits, rectifiers, inverters, bypass output switching circuits, and batteries. UPS can achieve uninterruptible power supply. That is, when the AC input is normal, the UPS rectifies the AC power into DC power, and then inverts the DC power into stable, impurity-free AC power for the load. In the event of a power outage, the UPS power supply will activate the energy storage battery, which inverts the DC power into stable AC power to continue supplying the load. In other words, the performance of the battery directly affects the stable operation of the entire UPS. Therefore, it is very necessary to discharge it for capacity testing.

[0003] In the prior art, the method for testing the capacity of a battery is to connect the battery to a UPS (not including a battery), and discharge the battery to the load connected to the UPS through the UPS. At this time, the battery capacity test can be achieved by collecting the electrical parameters during the battery discharge process. On this basis, the UPS will subsequently obtain electricity from the mains to charge the battery. This solution is effective when testing a single battery. When the number of batteries to be tested increases, for example, when it is necessary to test the battery modules of one or more cabinets, the cost of the existing testing solution will increase significantly and the efficiency will also be low. In addition, due to the constant interaction with the mains and load during the capacity test process, the existing technology is also prone to affecting the stability of the system. Summary of the Invention

[0004] The purpose of the present invention is to provide a battery system testing method, a battery management terminal, and a storage medium to solve the technical problems of the prior art, such as high cost, low efficiency, and easy impact on system stability when faced with a large number of batteries to be tested.

[0005] A first aspect of an embodiment of the present invention provides a battery system testing method, wherein the battery system includes at least one battery cabinet, each battery cabinet including multiple battery modules connected in parallel, and each battery cabinet / battery module is connected to a target power conversion circuit; the target power conversion circuit is connected to a mains supply and an electronic load at both ends, and is configured to power the electronic load together with the tested battery cabinet / battery module upon receiving a battery test flag; the battery system testing method includes:

[0006] In response to a test start instruction triggered by an internal / external trigger, determining the number of phases of the current battery test task;

[0007] If the current battery test task is the first phase test, a battery test flag is sent to the target power conversion circuit, and a corresponding battery cabinet / battery module is selected to perform a discharge test based on the test item information in the test start instruction;

[0008] If the current battery test task is not the first test, select the corresponding battery cabinet / battery module based on the test item information in the test start instruction, adjust some / all battery cabinets / battery modules that have completed the discharge test to the load corresponding to the current battery test task, and perform the discharge test;

[0009] In response to the test end instruction triggered by the internal / external trigger, the current battery test task is ended, and the next battery test task is triggered or the battery test mode is exited.

[0010] In a possible implementation, when performing the discharge test, the battery system testing method further includes:

[0011] The battery cabinets / battery modules in the battery system that have not undergone a discharge test and the battery cabinets / battery modules that have undergone a discharge test but have not been adjusted as loads are controlled to operate in a low-voltage hot backup mode.

[0012] In one possible implementation, each battery cabinet / battery module is connected to a target power conversion circuit via an isolated DC / DC circuit. If the current battery test task is the first phase test, the battery system test method further includes:

[0013] The isolated DC / DC circuit corresponding to the tested battery cabinet / battery module is controlled so that the target power conversion circuit and the tested battery cabinet / battery module jointly power the electronic load after receiving the battery test mark.

[0014] In a possible implementation, the battery system testing method further includes a process of setting a test start instruction, wherein the setting of the test start instruction includes:

[0015] The number of battery cabinets / battery modules in the nth test phase is set to be smaller than the number of battery cabinets / battery modules in the first test phase; where n is an integer and n is greater than 1.

[0016] In a possible implementation, the number of battery cabinets / battery modules in the first test phase is set to s, and the number of battery cabinets / battery modules in the nth test phase is set to s-1.

[0017] In one possible implementation, adjusting some / all battery cabinets / battery modules that have completed discharge testing to loads corresponding to the current battery testing task includes:

[0018] Adjust the battery cabinet / battery module tested in the previous test task to the load corresponding to the current battery test task.

[0019] In a possible implementation, in response to a test end instruction triggered by an internal / external trigger, the battery system test method further includes:

[0020] Determine the number of the current battery test task;

[0021] Correspondingly, if the current battery test task is not the last test, the next battery test task is triggered; if the current battery test task is the last test, the battery test mode is exited.

[0022] In one possible implementation, the target power conversion circuit is further configured to charge the corresponding battery cabinet / battery module after receiving a battery charging instruction; after exiting the battery test mode, the battery system testing method further includes:

[0023] A battery charging instruction is sent to the target power conversion circuit so that the target power conversion circuit charges the battery cabinet / battery module of the last test period.

[0024] According to a second aspect of an embodiment of the present invention, a battery management terminal is provided, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the above-mentioned battery system testing method when executing the computer program.

[0025] According to a third aspect of an embodiment of the present invention, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the above-mentioned battery system testing method are implemented.

[0026] The battery system testing method, battery management terminal, and storage medium provided by the present invention have the following beneficial effects:

[0027] First of all, the present invention supports batch testing. In each battery test task, the test can be performed on a battery module basis (for example, multiple battery modules can be tested), or on a battery cabinet basis (for example, multiple battery cabinets can be tested), and the test method is flexible. On this basis, if the current battery test task is not the first test, the present invention will also adjust (partial / all) battery cabinets / battery modules that have completed the discharge test to the load corresponding to the current battery test task. Based on this point, the present invention can effectively reduce the use of mains electricity, thereby saving the electricity cost of battery testing, and using battery cabinets / battery modules that have completed the discharge test as loads can also effectively reduce the number of interactions between the battery cabinet / battery module and the mains electricity and electronic load (corresponding to the target power conversion module) during the discharge test, thereby reducing the impact on the mains electricity and electronic load, and ensuring system stability. In addition, when the battery cabinet / battery module interacts with the power conversion circuit, the mains, and the electronic load, it is necessary to control the battery cabinet / battery module and the power conversion circuit itself (that is, the controller corresponding to the battery cabinet / battery module and the controller of the target power conversion module itself both need to be controlled accordingly). When the battery cabinet / battery module is used as a load, only the battery cabinet / battery module needs to be controlled (at this time, only the controller corresponding to the battery cabinet / battery module is required to perform corresponding control). Therefore, reducing the number of interactions with the mains and electronic loads can also reduce control costs and improve test efficiency. In other words, the solution based on the present invention can effectively solve the problems of the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 A flowchart of a battery system testing method according to an embodiment of the present invention;

[0030] Figure 2 A structural block diagram of a battery system testing device provided in one embodiment of the present invention;

[0031] Figure 3 A schematic block diagram of a battery management terminal provided in one embodiment of the present invention;

[0032] Figure 4 A schematic diagram of an implementation flow of a battery system testing method provided in one embodiment of the present invention;

[0033] Figure 5 A schematic diagram of an implementation flow for canceling a battery test according to an embodiment of the present invention;

[0034] Figure 6 A schematic diagram of an implementation flow of a battery module discharge test according to an embodiment of the present invention;

[0035] Figure 7 A schematic diagram of an implementation flow of a battery module after testing is completed according to an embodiment of the present invention;

[0036] Figure 8 This is a judgment logic diagram corresponding to the completion of the module battery test and the completion of the system battery test provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0037] In the following description, specific details such as particular system structures and techniques are provided for purposes of illustration, not limitation, to facilitate a thorough understanding of the embodiments of the present invention. However, it will be apparent to those skilled in the art that the present invention may be practiced in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

[0038] In order to make the purpose, technical solutions and advantages of the present invention more clear, specific embodiments will be described below with reference to the accompanying drawings.

[0039] Please refer to Figure 1 , Figure 1 For a flow chart of a battery system testing method provided by an embodiment of the present invention, please refer to Figure 2 , Figure 2 A battery system test structure diagram provided by an embodiment of the present invention, Figure 2 Take a battery cabinet containing 20 battery modules as an example, wherein the 1st cabinet, the 2nd cabinet, the nth cabinet, etc. refer to battery cabinets, module 1, module 2, ..., module 20, etc. refer to battery modules, the power conversion circuit is the target power conversion circuit described in the embodiment of the present invention, MBMU represents the main battery management system, and SBMU represents the auxiliary battery management system provided in the battery cabinet. Among them, MBMU can be used as the execution subject of the battery system test method provided in the embodiment of the present invention. MBMU directly or indirectly controls the execution of the discharge test of the battery cabinet / battery module by communicating with other related modules. Figure 2 As shown, the battery system includes at least one battery cabinet, each battery cabinet contains multiple battery modules connected in parallel, and each battery cabinet / battery module is connected to a target power conversion circuit. The two ends of the target power conversion circuit are respectively connected to the mains and the electronic load, which is used to power the electronic load together with the tested battery cabinet / battery module after receiving the battery test mark. Among them, when the number of battery cabinets exceeds one, the battery cabinets are connected in parallel. On this basis, the battery system testing method provided by the embodiment of the present invention includes:

[0040] S101: In response to a test start instruction triggered by an internal / external trigger, determine the phase number of the current battery test task.

[0041] In this embodiment, when an internal or externally triggered test start instruction is received, the battery test mode is entered, and the number of the current battery test task is determined, and how to perform the discharge test is determined according to the number of the current battery test task.

[0042] In this embodiment, an externally triggered test start instruction can be generated by receiving external input information. For example, a user can trigger a corresponding operation on the MBMU touchscreen (e.g., using the MBMU touchscreen to set up grouped battery cabinet / battery module testing, selecting an entire cabinet or specifying specific battery modules on a schedule, and then clicking Start Test after completing the settings). An internally triggered test start instruction can be automatically triggered upon completion of the previous battery test task, or it can be automatically triggered by a system-defined scheduled task, without limitation.

[0043] S102: If the current battery test task is the first phase test, a battery test flag is sent to the target power conversion circuit, and a corresponding battery cabinet / battery module is selected to perform a discharge test based on the test item information in the test start instruction.

[0044] In this embodiment, the target power conversion circuit may query whether a battery test flag is received at a certain time interval or in real time, and adjust its own electrical parameters to cooperate with the aforementioned discharge test when the battery test flag is received.

[0045] In this embodiment, if the current battery test task is the first phase test, the target power conversion circuit and the battery cabinet / battery module selected for testing jointly power the electronic load. At this point, a battery test flag may be sent to the target power conversion circuit to cause it to adjust its electrical parameters to facilitate the aforementioned discharge test. Specifically, performing the discharge test may involve increasing the output voltage of the selected battery cabinet / battery module to discharge the selected battery cabinet / battery module. This control may be direct or indirect via a corresponding voltage transformer circuit, which is not limited herein.

[0046] S103: If the current battery test task is not the first test, select the corresponding battery cabinet / battery module based on the test item information in the test start instruction, adjust some / all battery cabinets / battery modules that have completed the discharge test to the load corresponding to the current battery test task, and perform the discharge test.

[0047] In this embodiment, if the current battery test task is not the first phase test, the "part / all" "battery cabinet / battery module" that has completed the discharge test can be adjusted to the load corresponding to the current battery test task. That is to say, the use of the electronic load corresponding to the target power conversion circuit is minimized, and the battery cabinet / battery module selected for testing discharges to the battery cabinet / battery module that has completed the discharge test, thereby reducing the use of mains power and the interaction with mains power and electronic loads, reducing costs and improving efficiency.

[0048] S104: In response to the test end instruction triggered by the internal / external trigger, end the current battery test task, trigger the next battery test task or exit the battery test mode.

[0049] In this embodiment, the test end command can be received by receiving an external input or a test end command from the battery cabinet / battery module being tested, without limitation. When the test end command is received, the current battery test task is terminated, and the next battery test task can be triggered later, or the battery test mode can be directly exited.

[0050] Figure 2 A specific application scenario is shown. Based on this, the specific application process of the present invention can refer to Figure 4 When the embodiments of the present invention are implemented, the MBMU can be used to control the discharge test of the battery system. After the discharge test is completed, the battery system and the power conversion circuit can be adaptively switched to the charging mode. Such implementation is based on the embodiments of the present invention.

[0051] On this basis, for the specific implementation of the embodiment of the present invention, reference can also be made to Figure 5 (Taking into account the parallel battery management unit PBMU in actual application, Figure 5 The corresponding operation of the PBMU when the test is canceled is also shown). Figure 5 As shown, the embodiment of the present invention can end the test by receiving a test end instruction input from the outside, which is specifically manifested in sending an exit test instruction to the relevant module, clearing relevant data, modifying register values, etc.

[0052] On this basis, for the specific implementation of the embodiment of the present invention, the embodiment of the present invention also provides the corresponding operation of the battery module, reference Figure 6 , Figure 6 The implementation process of the battery module itself is shown, that is, the battery module may have operations starting from receiving the battery test instruction. Figure 6As shown, when the battery module determines that it needs to perform a discharge test (ID match), it will not reduce the output voltage (for discharge). When it determines that it does not need to perform a discharge test (ID mismatch), it will reduce the output voltage. At this time, the battery module that is not performing a discharge test is in a low-voltage hot backup state, which is used to provide backup power for the target power conversion circuit.

[0053] On this basis, for the specific implementation of the embodiment of the present invention, the embodiment of the present invention also provides the corresponding operation of the battery module, reference Figure 7 , Figure 7 The implementation process after the battery module itself ends the discharge test is shown in FIG. Figure 7 As shown, after the battery module determines that the battery test is completed, it sends relevant information to the SBMU, and the battery module reduces the voltage and enters the low-voltage hot backup module. After a certain delay, the output voltage is restored and the battery test mode is completely exited. Figure 7 The judgment logic for the end of the module battery test and the end of the system battery test can be as follows: Figure 8 As shown, Figure 8 The medium hot backup module refers to the battery module in the aforementioned low-voltage hot backup state.

[0054] In the above example, the test start instruction can include test enable and test item information (i.e., the ID bit of the battery module selected for testing). The ID bit can be composed of 24 digits, which can represent up to 24 module IDs. A maximum of 20 modules in a single cabinet occupy 20 bits of data.

[0055] In the above example, the battery module uses a closed-loop output voltage, with a rated output voltage of generally 240V and a droop characteristic. For battery modules in low-voltage hot backup, the loop control voltage setpoint can be adjusted to 210V. The loop is slowly set to 210V and maintained at this state to prevent the situation where there is no backup power in the event of a mains power outage. It should be noted that the above description is based on the battery module as the unit. In actual testing, the battery cabinet can also be used as the test unit. The essence of this is the same as that of the battery module and will not be repeated here.

[0056] From the above, it can be concluded that the embodiment of the present invention supports batch testing. In each battery test task, the test can be performed on a battery module basis (for example, testing multiple battery modules) or on a battery cabinet basis (for example, testing multiple battery cabinets). The test method is flexible. On this basis, if the current battery test task is not the first test, the embodiment of the present invention will also adjust (partial / all) battery cabinets / battery modules that have completed the discharge test to the load corresponding to the current battery test task. Based on this point, the embodiment of the present invention can effectively reduce the use of mains electricity, thereby saving the electricity cost of the battery test. In addition, using the battery cabinet / battery module that has completed the discharge test as the load can also effectively reduce the number of interactions between the battery cabinet / battery module and the mains electricity and electronic load (corresponding to the target power conversion module) during the discharge test, thereby reducing the impact on the mains electricity and the electronic load, and ensuring system stability. In addition, when the battery cabinet / battery module interacts with the power conversion circuit, the mains, and the electronic load, it is necessary to control the battery cabinet / battery module and the power conversion circuit itself (that is, the controller corresponding to the battery cabinet / battery module and the controller of the target power conversion module itself both need to be controlled accordingly). When the battery cabinet / battery module is used as a load, only the battery cabinet / battery module needs to be controlled (at this time, only the controller corresponding to the battery cabinet / battery module needs to be controlled accordingly). Therefore, reducing the number of interactions with the mains and electronic loads can also reduce control costs and improve test efficiency. In other words, the solution based on the embodiment of the present invention can effectively solve the problems of the prior art.

[0057] In a possible implementation, when performing the discharge test, the battery system testing method further includes:

[0058] The battery cabinets / battery modules in the control battery system that have not undergone a discharge test, and the battery cabinets / battery modules that have undergone a discharge test but have not been adjusted as a load, operate in a low-voltage hot backup mode.

[0059] In this embodiment, the method for controlling a battery cabinet / battery module to operate in the low-voltage hot backup mode is as follows:

[0060] Control the output voltage of the battery cabinet / battery module to reduce the preset voltage value.

[0061] For example, refer to Figure 7 , Figure 7 When describing the implementation process after the battery module itself completes the discharge test, the low-voltage hot backup process is also disclosed. Figure 7 As shown, after the battery module determines that the battery test is completed, it sends relevant information to the SBMU, and the battery module reduces the voltage ( Figure 7 30V) enters the low voltage hot backup module, and after a certain delay, the output voltage is restored to 240V, and the battery test mode is completely exited. Figure 7It can be seen that when the rated voltage of the battery module is 240V, the output voltage of the battery module can be maintained at 210V by lowering the output voltage of the battery module by 30V (that is, the preset voltage value is 30V at this time), so that the battery module operates in low-voltage hot backup mode, thereby effectively reducing the risk of no backup power after the mains power is lost during the battery test.

[0062] In one possible implementation, each battery cabinet / battery module is connected to a target power conversion circuit via an isolated DC / DC circuit. If the current battery test task is the first phase test, the battery system test method further includes:

[0063] The isolated DC / DC circuit corresponding to the tested battery cabinet / battery module is controlled so that the target power conversion circuit and the tested battery cabinet / battery module jointly power the electronic load after receiving the battery test mark.

[0064] In this embodiment, the charging and discharging of the battery module can be achieved by controlling an isolated DC / DC circuit, for example, by using an LLC+BOOST circuit (ie, LLC resonant circuit+boost circuit).

[0065] In a possible implementation, the battery system testing method further includes a process of setting a test start instruction, where setting the test start instruction includes:

[0066] The number of battery cabinets / battery modules in the nth test phase is set to be smaller than the number of battery cabinets / battery modules in the first test phase. Where n is an integer greater than 1.

[0067] In the prior art, the number of battery modules to be charged and discharged is typically set to be the same. When a capacity mismatch between the charge and discharge of the battery modules is detected, additional external equipment is used to consume excess energy. This method is essentially a remedial measure after a mismatch in charge and discharge capacity is detected, and the control is relatively complex. Unlike the prior art, this embodiment first considers the capacity mismatch between the charge and discharge of the battery modules. By setting the number of battery cabinets / battery modules to be tested, it ensures that the number of battery modules to be discharged is less than the number of battery modules to be charged (there is no margin problem in the prior art), thereby avoiding the need for additional external equipment, simplifying control, and more effectively utilizing energy. In other words, this embodiment of the present invention can ensure that in subsequent tests, the number of battery cabinets / battery modules to be discharged in the current battery test task is less than the number of fully discharged rechargeable battery cabinets / battery modules. This directly avoids the interaction between the current test task and the mains power supply and electronic loads, saving power and reducing the impact on the mains power supply and electronic loads, saving control costs, and ensuring system stability.

[0068] In one possible implementation, the number of battery cabinets / battery modules in the first test phase is set to s, and the number of battery cabinets / battery modules in the nth test phase is set to s-1. Based on this, the embodiment of the present invention can adjust the battery cabinets / battery modules tested in the previous test phase to the load corresponding to the current battery test phase.

[0069] That is to say, the specific discharge test process is as follows (taking the battery module as an example):

[0070] In the first phase of the test, a discharge test was conducted on the three battery modules, at which time the three battery modules and the mains power were used to power the electronic load.

[0071] During the transition from the first test phase to the second test phase, the electronic load is powered by the mains.

[0072] In the second phase of the test, a discharge test is performed on two battery modules. At this time, the three battery modules that were discharged in the first phase of the test can be used as the load in this battery test task (two battery modules from the three discharged battery modules in the previous phase can be randomly selected as the load, or all three discharged battery modules in the previous phase can be used as the load). This avoids the interaction between the current test task and the mains power and electronic load, which not only saves power but also reduces the impact on the mains power and electronic load.

[0073] In one possible implementation, in response to a test end instruction triggered by an internal / external trigger, the battery system test method further includes:

[0074] Determine the number of the current battery test task.

[0075] Correspondingly, if the current battery test task is not the last test, the next battery test task will be triggered. If the current battery test task is the last test, the battery test mode will be exited.

[0076] In this embodiment, when the current battery test task ends, the subsequent operation can be determined by judging the number of the current battery test task, that is, when the current battery test task is not the last test, the next battery test task is triggered, and when the current battery test task is the last test, the battery test mode is exited.

[0077] In one possible implementation, the target power conversion circuit is further configured to charge the corresponding battery cabinet / battery module after receiving a battery charging instruction. After exiting the battery test mode, the battery system test method further includes:

[0078] Send a battery charging instruction to the target power conversion circuit so that the target power conversion circuit charges the battery cabinet / battery module tested in the last phase.

[0079] In this embodiment, after all the discharge tests are completed, the uncharged battery cabinets / battery modules (mainly the battery cabinets / battery modules tested in the last phase) can be charged for later use.

[0080] See also Figure 3 , Figure 3 This is a schematic block diagram of a battery management terminal provided by an embodiment of the present invention. Figure 3 The terminal 300 in this embodiment may include one or more processors 301, one or more input devices 302, one or more output devices 303, and one or more memories 304. The processors 301, input devices 302, output devices 303, and memories 304 communicate with each other via a communication bus 305. The memories 304 are used to store computer programs, which include program instructions. The processor 301 is configured to execute the program instructions stored in the memory 304. Specifically, the processor 301 is configured to invoke the program instructions to perform the steps of the above-described method embodiments.

[0081] It should be understood that in the embodiment of the present invention, the processor 301 may be a central processing unit (CPU), and may also be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc.

[0082] The input device 302 may include a touchpad, a fingerprint sensor (for collecting the user's fingerprint information and fingerprint direction information), a microphone, etc. The output device 303 may include a display (LCD, etc.), a speaker, etc.

[0083] The memory 304 may include a read-only memory and a random access memory, and provides instructions and data to the processor 301. A portion of the memory 304 may also include a non-volatile random access memory. For example, the memory 304 may also store information about the device type.

[0084] In a specific implementation, the processor 301, input device 302, and output device 303 described in the embodiment of the present invention can execute the implementation methods described in the first and second embodiments of the battery system testing method provided in the embodiment of the present invention, and can also execute the implementation method of the terminal described in the embodiment of the present invention, which will not be repeated here.

[0085] In another embodiment of the present invention, a computer-readable storage medium is provided. The computer-readable storage medium stores a computer program. The computer program includes program instructions. When the program instructions are executed by a processor, all or part of the process in the above-mentioned embodiment method is implemented. The computer program can also be used to instruct related hardware to complete the process. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by the processor, the steps of each of the above-mentioned method embodiments are implemented. The computer program includes computer program code. The computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium can include: any entity or device capable of carrying computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electric carrier signal, telecommunication signal and software distribution medium. It should be noted that the content contained in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable media do not include electric carrier signals and telecommunication signals.

[0086] The computer-readable storage medium may be an internal storage unit of the terminal in any of the aforementioned embodiments, such as a hard disk or memory of the terminal. The computer-readable storage medium may also be an external storage device of the terminal, such as a plug-in hard disk equipped on the terminal, a smart memory card (SMC), a secure digital (SD) card, a flash memory card, etc. Furthermore, the computer-readable storage medium may include both an internal storage unit of the terminal and an external storage device. The computer-readable storage medium is used to store computer programs and other programs and data required by the terminal. The computer-readable storage medium may also be used to temporarily store data that has been output or is about to be output.

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

[0088] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the terminals and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0089] In the several embodiments provided in this application, it should be understood that the disclosed terminals and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces or units, or can be an electrical, mechanical or other form of connection.

[0090] Units described as separate components may or may not be physically separate, and components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected based on actual needs to achieve the objectives of the embodiments of the present invention.

[0091] In addition, the functional units in the various embodiments of the present invention may be integrated into a single processing unit, each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0092] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and such modifications or substitutions are intended to be within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. A battery system testing method, characterized in that: The battery system includes at least one battery cabinet, each battery cabinet containing multiple battery modules connected in parallel, and each battery cabinet / battery module is connected to a target power conversion circuit; the two ends of the target power conversion circuit are respectively connected to the mains and the electronic load, which is used to jointly power the electronic load with the tested battery cabinet / battery module after receiving a battery test mark; The battery system testing method includes: In response to a test start instruction triggered by an internal / external trigger, determining the number of phases of the current battery test task; If the current battery test task is the first phase test, a battery test flag is sent to the target power conversion circuit, and a corresponding battery cabinet / battery module is selected to perform a discharge test based on the test item information in the test start instruction; If the current battery test task is not the first test, select the corresponding battery cabinet / battery module based on the test item information in the test start instruction, adjust some / all battery cabinets / battery modules that have completed the discharge test to the load corresponding to the current battery test task, and perform the discharge test; In response to the test end instruction triggered by internal / external trigger, the current battery test task is ended and the next battery test task is triggered or the battery test mode is exited; The battery system testing method further includes a process of setting a test start instruction, wherein the setting of the test start instruction includes: The number of battery cabinets / battery modules in the nth test phase is set to be smaller than the number of battery cabinets / battery modules in the first test phase; where n is an integer and n is greater than 1.

2. The battery system testing method according to claim 1, wherein: When performing the discharge test, the battery system testing method further includes: The battery cabinets / battery modules in the battery system that have not undergone a discharge test and the battery cabinets / battery modules that have undergone a discharge test but have not been adjusted as loads are controlled to operate in a low-voltage hot backup mode.

3. The battery system testing method according to claim 1, wherein: Each battery cabinet / battery module is connected to the target power conversion circuit via an isolated DC / DC circuit. If the current battery test task is the first phase test, the battery system test method further includes: The isolated DC / DC circuit corresponding to the tested battery cabinet / battery module is controlled so that the target power conversion circuit and the tested battery cabinet / battery module jointly power the electronic load after receiving the battery test mark.

4. The battery system testing method according to claim 1, wherein: The number of battery cabinets / battery modules in the first test phase is set to s, and the number of battery cabinets / battery modules in the nth test phase is set to s-1.

5. The battery system testing method according to claim 4, wherein: Adjusting some / all battery cabinets / battery modules that have completed the discharge test to the load corresponding to the current battery test task includes: Adjust the battery cabinet / battery module tested in the previous test task to the load corresponding to the current battery test task.

6. The battery system testing method according to any one of claims 1 to 5, characterized in that: In response to a test end instruction triggered by an internal / external trigger, the battery system test method further includes: Determine the number of the current battery test task; Correspondingly, if the current battery test task is not the last test, the next battery test task is triggered; if the current battery test task is the last test, the battery test mode is exited.

7. The battery system testing method according to any one of claims 1 to 5, characterized in that: The target power conversion circuit is further configured to charge the corresponding battery cabinet / battery module after receiving a battery charging instruction; after exiting the battery test mode, the battery system testing method further includes: A battery charging instruction is sent to the target power conversion circuit so that the target power conversion circuit charges the battery cabinet / battery module of the last test period.

8. A battery management terminal comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 7 are implemented.

9. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

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