A backup power supply module, intelligent container and control method

Abstract

The present invention discloses a backup power supply module, which is arranged in a smart container. The backup power supply module includes: a battery management board and a lithium battery pack, the lithium battery pack is connected to the battery management board, the battery management board is respectively connected to the MCU of the smart container and the Android mainboard of the smart container, and the battery management board is used to: when the battery management board is connected to the mains, according to the mains voltage, determine the working state of the lithium battery pack and control the lithium battery pack to switch to the working state. The abnormal situation caused by the power supply switching between the mains and the lithium battery pack of the existing smart container is avoided, and the failure rate of the smart container is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of a backup power module in a smart container, and in particular to a backup power module, a smart container and a control method. Background Art

[0002] Currently, in smart containers, the lithium battery pack or AC power is controlled by an Android mainboard to power the smart container, and the AC power is controlled to charge the lithium battery pack. However, the method of controlling charging and switching power supply by the Android mainboard will cause the smart container to frequently switch between the AC power and the lithium battery pack, resulting in abnormal situations, making the smart container unable to work normally.

[0003] That is to say, the backup power supply module in the existing smart container has a technical problem of a high failure rate in supplying power to the smart container.

[0004] Application Contents

[0005] The present invention is intended to provide a backup power supply module, a smart container and a control method to solve the technical problem that the backup power supply module in the smart container has a high failure rate when supplying power to the smart container.

[0006] The technical solution of the present invention is achieved in this way:

[0007] A backup power supply module is provided in a smart container, and includes a battery management board and a lithium battery pack; wherein:

[0008] The lithium battery pack is connected to the battery management board, and the battery management board is respectively connected to the microcontroller (MCU, Micro Controller Unit) of the smart container and the Android mainboard of the smart container;

[0009] The battery management board is used to: when the battery management board is connected to the mains, determine the working state of the lithium battery pack according to the mains voltage and control the lithium battery pack to switch to the working state;

[0010] Wherein, the working state of the lithium battery pack includes: charging state and power supply state.

[0011] A smart container includes the backup power supply module described in one or more of the above embodiments.

[0012] A control method, which is applied to a battery management board in a backup power module according to one or more of the above embodiments, comprises:

[0013] When the battery management board is connected to the mains, the working state of the lithium battery pack is determined according to the mains voltage and the lithium battery pack is controlled to switch to the working state;

[0014] A battery management board, which is disposed in the smart container described in one or more of the above embodiments, includes:

[0015] A determination module, used for determining the working state of the lithium battery pack and controlling the lithium battery pack to switch to the working state according to the voltage of the mains when the battery management board is connected to the mains;

[0016] Wherein, the working state of the lithium battery pack includes: charging state and power supply state.

[0017] A battery management board, comprising:

[0018] A processor and a storage medium storing instructions executable by the processor, wherein the storage medium relies on the processor to perform operations through a communication bus, and when the instructions are executed by the processor, the control method described in one or more of the above embodiments is executed.

[0019] A computer storage medium, characterized in that executable instructions are stored therein, and when the executable instructions are executed by one or more processors, the processors execute the control method described in one or more of the above embodiments.

[0020] The present invention provides a backup power supply module, a smart container and a control method. The backup power supply module is arranged in the smart container. The backup power supply module includes: a battery management board and a lithium battery pack, wherein the lithium battery pack is connected to the battery management board, and the battery management board is respectively connected to the MCU of the smart container and the Android mainboard of the smart container. The battery management board is used to: when the battery management board is connected to the mains, determine the working state of the lithium battery pack according to the mains voltage and control the lithium battery pack to switch to the working state; that is, in the invention, the working state of the lithium battery pack can be determined by the battery management board in the backup power supply module, and the working state of the lithium battery pack can be switched to the determined working state, so that the smart container can operate normally. In this way, the occurrence of abnormal situations caused by the power supply switching between the mains and the lithium battery pack in the existing smart container is avoided, and the failure rate of the smart container is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the structure of an optional backup power supply module provided by the present invention;

[0022] Figure 2 It is a structural schematic diagram of a backup power supply module in the related art;

[0023] Figure 3 A schematic structural diagram of an example of an optional backup power supply module provided by the present invention;

[0024] Figure 4 A schematic diagram of the structure of an optional feedback terminal provided by the present invention;

[0025] Figure 5 A schematic diagram of the structure of an optional smart container provided by the present invention;

[0026] Figure 6 A schematic flow chart of an optional control method provided by the present invention;

[0027] Figure 7 A schematic diagram of the structure of an optional battery management board provided by the present invention;

[0028] Figure 8 A schematic structural diagram of another optional battery management board provided by the present invention. DETAILED DESCRIPTION

[0029] In order to better understand the purpose, structure and function of the present invention, a backup power supply module, a smart container and a control method of the present invention are further described in detail below in conjunction with the accompanying drawings.

[0030] The present invention provides a backup power supply module, which is arranged in a smart container. Figure 1 A schematic diagram of the structure of an optional backup power module provided by the present invention, referring to Figure 1 As shown, the backup power module may include: a battery management board 11 and a lithium battery pack 12; wherein,

[0031] The battery management board 11 is connected to the lithium battery pack 12, and the battery management board 11 is respectively connected to the MCU 13 of the smart container and the Android mainboard 14 of the smart container;

[0032] The battery management board 11 is used to: when the battery management board 11 is connected to the mains, determine the working state of the lithium battery pack 12 according to the mains voltage and control the lithium battery pack 12 to switch to the working state;

[0033] Specifically, in the related art, the backup power supply of the smart container is usually charged by the Android motherboard, or the Android motherboard controls whether the backup power supply supplies power to the smart container. Figure 2 is a schematic diagram of the structure of a backup power supply module in the related art, such as Figure 2As shown, the positive and negative electrodes of the Android mainboard are respectively connected to the positive and negative electrodes of the mains, the positive and negative electrodes of the lithium battery pack and the positive and negative electrodes of the MCU of the smart container, and a switch is provided between the positive electrode of the lithium battery pack and the positive electrode of the Android mainboard, and the output feedback end of the lithium battery pack is connected to the input feedback end of the Android mainboard. In addition, the Android mainboard and the MCU communicate through the R232 interface.

[0034] Among them, when the input voltage (VACC) of the Android mainboard is greater than the minimum voltage (UVLO), and VACN (VACN is VACC minus the voltage drop of two MOS tubes) is greater than the voltage of the lithium battery pack (VSRN) + 200mV, if the input voltage of the AC power is 12V, and the voltage of the lithium battery pack is greater than 11.6V, the Android mainboard will frequently switch between the AC power and the lithium battery pack during normal operation of the smart container, causing the light-emitting diode (LED) used for lighting in the smart container to flash, and the Android mainboard restart light will abnormally occur.

[0035] In order to prevent the occurrence of abnormal situations, the present invention provides a backup power supply module. The battery management board in the module can determine the working status of the lithium battery pack when connected to the mains power. The working status of the lithium battery pack 12 includes: charging status and power supply status. The power supply status refers to the lithium battery pack supplying power to the smart container, and the charging status refers to the mains power charging the lithium battery pack.

[0036] In this way, the working state of the lithium battery pack is switched through the battery management board, avoiding the use of the Android mainboard on the smart cabinet to switch the state of the lithium battery pack, which can prevent the smart cabinet from having abnormal situations due to power supply problems.

[0037] Furthermore, in order to be able to normally switch power supply for the smart container between the mains and the lithium battery pack, in an optional embodiment, the positive and negative electrodes of the battery management board are respectively connected to the positive and negative electrodes of the mains, the positive and negative electrodes of the MCU of the smart container, the positive and negative electrodes of the Android mainboard of the smart container, and the positive and negative electrodes of the lithium battery pack; wherein,

[0038] The battery management board is used for:

[0039] When the battery management board is connected to the mains and the mains voltage is greater than a preset threshold voltage, the mains is used to charge the lithium battery pack so that the lithium battery pack is in a charging state;

[0040] When the battery management board is connected to the mains and the mains voltage is less than or equal to the preset threshold voltage, the lithium battery pack is controlled to supply power to the smart cabinet so that the lithium battery pack is in a power supply state.

[0041] That is to say, connect the positive pole of the battery management board to the positive pole of the AC power, connect the negative pole of the battery management board to the negative pole of the AC power, connect the positive pole of the battery management board to the positive pole of the MCU of the smart container, connect the negative pole of the battery management board to the negative pole of the MCU of the smart container, connect the positive pole of the battery management board to the positive pole of the Android motherboard, and connect the negative pole of the battery management board to the negative pole of the Android motherboard.

[0042] Based on the above connection structure, when the battery management board is connected to the mains, that is, when the plug of the smart container is inserted into the socket, the relationship between the mains voltage and the preset threshold voltage is judged. If it is greater than the preset threshold voltage, it is determined that the working state of the lithium battery pack is the charging state. Therefore, the battery management board uses the mains to charge the lithium battery pack, so that the lithium battery pack is in the charging state.

[0043] If the mains voltage is less than or equal to the preset threshold voltage, it is determined that the working state of the lithium battery pack is the power supply state. Therefore, the battery management board controls the lithium battery pack to supply power to the MCU of the smart cabinet and the Android mainboard of the smart cabinet, so that the lithium battery pack is in the power supply state.

[0044] In addition, the smart container may also be in a state of being disconnected from the mains. In an optional embodiment, the battery management board is further used for:

[0045] When the battery management board is not connected to the mains, the lithium battery pack is controlled to supply power to the smart cabinet so that the lithium battery pack is in a power supply state.

[0046] Specifically, when the battery management board is not connected to the mains, that is, the smart container is disconnected from the mains, in order to enable the smart container to work normally, the working state of the lithium battery pack is determined to be the power supply state, and the battery management board controls the lithium battery pack to supply power to the smart container, so that the lithium battery pack is in the power supply state.

[0047] In practical applications, the battery management board can control whether the lithium battery pack supplies power to the smart cabinet by turning on or off the diode.

[0048] In addition, in order to protect the lithium battery pack and eliminate the potential safety hazards of the lithium battery pack, in an optional embodiment, the backup power supply module further includes: a switch element, the switch element is arranged between the positive electrode of the lithium battery pack and the positive electrode of the battery management board, or the switch element is arranged between the negative electrode of the lithium battery pack and the negative electrode of the battery management board; wherein,

[0049] Switching elements are used for:

[0050] Connect the branch between the lithium battery pack and the battery management board, or disconnect the branch between the lithium battery pack and the battery management board.

[0051] That is to say, a switching element is arranged between the battery management board and the lithium battery pack, which may include two connection methods, one of which is that one connection end of the switching element is connected to the positive electrode of the lithium battery pack, and the other connection end of the switching element is connected to the positive electrode of the battery management board; the other is that one connection end of the switching element is connected to the negative electrode of the lithium battery pack, and the other connection end of the switching element is connected to the negative electrode of the battery management board.

[0052] The control end of the switch element may be controlled manually or by other signals, and the present invention does not make any specific limitation here.

[0053] Then, during the transportation of the smart container, the branch between the lithium battery pack and the battery management board can be disconnected by closing the switch element. During the operation of the smart container, the branch between the lithium battery pack and the battery management board can be connected by closing the switch element.

[0054] In this way, the switch element is used to connect or disconnect the branch between the lithium battery pack and the battery management board, which can ensure the normal operation of the backup power module and the safety of the backup power module.

[0055] In addition, in order to enable the battery management board to know the working status of the lithium battery pack, in an optional embodiment, the output feedback terminal of the lithium battery pack is connected to the input feedback terminal of the battery management board; wherein,

[0056] Lithium batteries are also used for:

[0057] Transmitting a first feedback signal to the battery management board through the output feedback terminal of the lithium battery pack and the input feedback terminal of the battery management board;

[0058] That is to say, a feedback branch is established between the lithium battery pack and the battery management board. Specifically, the output feedback end of the lithium battery pack is connected to the input feedback end of the battery management board. In this way, a feedback branch is formed between the lithium battery pack and the battery management board, and the battery management board can obtain the first feedback signal from the lithium battery pack through the feedback branch.

[0059] Among them, the first feedback signal is used to feedback the working status of the lithium battery pack. The first feedback signal is used as the input of the collector of the NPN transistor in the battery management board. The working status of the NPN transistor is controlled by the first feedback signal. The working status of the lithium battery pack is determined by the working status of the NPN transistor, so that the battery management board can know whether the working status of the lithium battery pack is a charging state or a power supply state.

[0060] In addition, in order to enable the smart container to know the connection status of the mains, in an optional embodiment, the output feedback terminal of the battery management board is connected to the input feedback terminal of the smart container; wherein,

[0061] The battery management board is also used for:

[0062] Transmitting a second feedback signal to the MCU of the smart container through the output feedback terminal of the battery management board and the input feedback terminal of the smart container;

[0063] Specifically, a feedback branch is established between the battery management board and the MCU of the smart container. Specifically, the output feedback end of the battery management board is connected to the input feedback end of the MCU of the smart container. In this way, a feedback branch is formed between the battery management board and the MCU of the smart container, and the MCU of the smart container can obtain the second feedback signal from the battery management board through the feedback branch.

[0064] Among them, the second feedback signal is used to feedback the working status of the lithium battery pack determined by the battery management board. After the MCU of the smart container receives the second feedback signal, it can be known from the second feedback signal whether the battery management board is connected to the mains, so that the MCU of the smart container can know the working status of the mains.

[0065] The following examples are used to illustrate the backup power supply module described in one or more of the above embodiments.

[0066] Figure 3 A schematic diagram of an example of an optional backup power module provided by the present invention, such as Figure 3 As shown, the backup power module includes: a battery management board and a lithium battery pack;

[0067] Among them, the 5 pins of the battery management board are connected to the 5 pins of the lithium battery pack, so that the positive electrode of the battery management board is connected to the positive electrode of the lithium battery pack, the negative electrode of the battery management board is connected to the negative electrode of the lithium battery pack, and a FB feedback branch is formed between the battery management board and the lithium battery pack. The 7 pins of the battery management board are respectively connected to the mains, the MCU of the smart container and the Android mainboard of the smart container, so that the positive electrode of the battery management board is connected to the positive electrode of the mains, the negative electrode of the battery management board is connected to the negative electrode of the mains, the positive electrode of the battery management board is connected to the positive electrode of the Android mainboard of the smart container, the negative electrode of the battery management board is connected to the negative electrode of the Android mainboard of the smart container, the positive electrode of the battery management board is connected to the positive electrode of the MCU of the smart container, the negative electrode of the battery management board is connected to the negative electrode of the MCU of the smart container, and a WB feedback branch is formed between the battery management board and the MCU of the smart container.

[0068] In addition, the MCU of the smart container communicates with the Android mainboard of the smart container through the R232 interface.

[0069] Working logic of the battery management board:

[0070] When the AC power voltage is greater than the preset threshold voltage of 11.8V, the AC power is used to charge the lithium battery pack. When the AC power is less than or equal to the preset threshold voltage of 11.8V, the lithium battery pack and the AC power are controlled to supply power to the smart cabinet at the same time. When the battery management board is not connected to the AC power, the lithium battery pack is controlled to supply power to the smart cabinet. This process can be achieved by switching the diode in the battery management board.

[0071] Figure 4 A schematic diagram of an optional feedback terminal provided by the present invention is shown in FIG. Figure 4 As shown, the NPN tube is a component in the battery management board. Through the 5-pin terminals of the battery management board, the collector of the NPN tube is connected to the feedback terminal of the first feedback signal of the lithium battery pack, and the working state of the lithium battery pack is determined by the working state of the NPN switch.

[0072] Through the above examples, the backup power module of the smart container effectively solves the abnormal performance of the smart container caused by the voltage drop of the metal oxide semiconductor field effect transistor (MOSFET) at the output end of the existing Android motherboard and the voltage difference of the conversion caused by the backup power module and the mains frequency conversion, and realizes the control and conversion of the power supply mode by the backup power module. The backup power module solution standardizes the backup power supply.

[0073] The present invention provides a backup power supply module, which is arranged in a smart container. The backup power supply module includes: a battery management board and a lithium battery pack, wherein the lithium battery pack is connected to the battery management board, and the battery management board is respectively connected to the MCU of the smart container and the Android mainboard of the smart container. The battery management board is used to: when the battery management board is connected to the mains, determine the working state of the lithium battery pack and control the lithium battery pack to switch to the working state according to the mains voltage; that is, in the present invention, the battery management board in the backup power supply module can determine the working state for the lithium battery pack, and switch the working state of the lithium battery pack to the determined working state, so that the smart container can operate normally. In this way, the occurrence of abnormal situations caused by the power supply switching between the mains and the lithium battery pack in the existing smart container is avoided, and the failure rate of the smart container is reduced.

[0074] Based on the same inventive concept, the present invention also provides a smart container. Figure 5 A schematic diagram of the structure of an optional smart container provided by the present invention, such as Figure 5 As shown, the smart container 500 includes the backup power supply module described in one or more of the above embodiments.

[0075] Based on the same inventive concept, the present invention provides a control method, which is applied to the battery management board in the backup power module described in one or more of the above embodiments. Figure 6 A flow chart of an optional control method provided by the present invention, referring to Figure 6 As shown, the control method may include:

[0076] S601: When the battery management board is connected to the mains, the working state of the lithium battery pack is determined according to the mains voltage and the lithium battery pack is controlled to switch to the working state;

[0077] Based on the above Figure 1 The present invention provides a control method, the execution subject of the method is the battery management board in the above-mentioned backup power supply module. When it is determined that the battery management board is connected to the mains, the battery management board determines the working state of the lithium battery pack according to the mains voltage, wherein the working state of the lithium battery pack includes: charging state and power supply state.

[0078] After determining the working state of the lithium battery pack, the lithium battery pack is controlled to switch to the determined working state; thus, the abnormal phenomenon occurring in the existing switching scheme is avoided, and the failure rate of the smart container in operation is reduced.

[0079] Furthermore, in order to determine the working state of the lithium battery pack, in an optional embodiment, S601 may include:

[0080] When the battery management board is connected to the mains and the mains voltage is greater than a preset threshold voltage, the mains is used to charge the lithium battery pack so that the lithium battery pack is in a charging state;

[0081] When the battery management board is connected to the mains and the mains voltage is less than or equal to the preset threshold voltage, the lithium battery pack is controlled to supply power to the smart cabinet so that the lithium battery pack is in a power supply state.

[0082] Specifically, when the battery management board is connected to the AC power, that is, when the plug of the smart container is inserted into the socket, the relationship between the AC power voltage and the preset threshold voltage is determined. If it is greater than the preset threshold voltage, it is determined that the working state of the lithium battery pack is the charging state. Therefore, the battery management board uses the AC power to charge the lithium battery pack, so that the lithium battery pack is in the charging state.

[0083] If the mains voltage is less than or equal to the preset threshold voltage, it is determined that the working state of the lithium battery pack is the power supply state. Therefore, the battery management board controls the lithium battery pack to supply power to the MCU of the smart cabinet and the Android mainboard of the smart cabinet, so that the lithium battery pack is in the power supply state.

[0084] In addition, the smart container may also be in a state of being disconnected from the mains. In an optional embodiment, the method may further include:

[0085] When the battery management board is not connected to the mains, the lithium battery pack is controlled to supply power to the smart cabinet so that the lithium battery pack is in a power supply state.

[0086] Specifically, when the battery management board is not connected to the mains, that is, the smart container is disconnected from the mains, in order to enable the container to work normally, the working state of the lithium battery pack is determined to be the power supply state, and the battery management board controls the lithium battery pack to supply power to the smart container, so that the lithium battery pack is in the power supply state.

[0087] In practical applications, the battery management board can control whether the lithium battery pack supplies power to the smart cabinet by turning on or off the diode.

[0088] The present invention provides a control method, wherein the backup power supply module is arranged in a smart container, and the backup power supply module comprises: a battery management board and a lithium battery pack, wherein the lithium battery pack is connected to the battery management board, and the battery management board is respectively connected to the MCU of the smart container and the Android mainboard of the smart container, and the battery management board is used for: when the battery management board is connected to the mains, according to the mains voltage, determining the working state of the lithium battery pack and controlling the lithium battery pack to switch to the working state; that is, in the present invention, the working state of the lithium battery pack can be determined by the battery management board in the backup power supply module, and the working state of the lithium battery pack is switched to the determined working state, so that the smart container can operate normally, thus avoiding the occurrence of abnormal situations caused by the power supply switching between the mains and the lithium battery pack in the existing smart container, and reducing the failure rate of the smart container.

[0089] Based on the same inventive concept, the present invention provides a battery management board, which is arranged in the smart container described in one or more of the above embodiments. Figure 7 A schematic diagram of the structure of an optional battery management board provided by the present invention, such as Figure 7 As shown, including:

[0090] The determination module 71 is used to determine the working state of the lithium battery pack and control the lithium battery pack to switch to the working state according to the voltage of the mains when the battery management board is connected to the mains;

[0091] The working status of the lithium battery pack includes: charging status and power supply status.

[0092] In the present invention, the determination module 71 is also used for:

[0093] When the battery management board is connected to the mains and the mains voltage is greater than a preset threshold voltage, the mains is used to charge the lithium battery pack so that the lithium battery pack is in a charging state;

[0094] When the battery management board is connected to the mains and the mains voltage is less than or equal to the preset threshold voltage, the lithium battery pack is controlled to supply power to the smart cabinet so that the lithium battery pack is in a power supply state.

[0095] In the present invention, the device is also used for:

[0096] When the battery management board is not connected to the mains, the lithium battery pack is controlled to supply power to the smart cabinet so that the lithium battery pack is in a power supply state.

[0097] In practical applications, the above-mentioned determination module 71 can be implemented by a processor located on a small board with a battery management system, specifically a central processing unit (CPU), a microprocessor (MPU), a digital signal processor (DSP) or a field programmable gate array (FPGA).

[0098] Based on the above embodiments, the present invention provides a battery management board. Figure 8 A schematic diagram of the structure of another optional battery management board provided by the present invention, such as Figure 8 As shown, the present invention provides a battery management board 800, including:

[0099] A processor 81 and a storage medium 82 storing executable instructions of the processor 81, wherein the storage medium 82 relies on the processor 81 to perform operations via a communication bus 83, and when the instructions are executed by the processor 81, the control method described in one or more of the above embodiments is executed.

[0100] It should be noted that in actual application, the various components in the terminal are coupled together through the communication bus 83. It is understandable that the communication bus 83 is used to realize the connection and communication between these components. In addition to the data bus, the communication bus 83 also includes a power bus, a control bus and a status signal bus. However, for the sake of clarity, Figure 8 Various buses are labeled as communication buses 83.

[0101] Based on the aforementioned embodiments, the present invention provides a computer-readable storage medium, which stores one or more programs. The one or more programs can be executed by one or more processors to perform the control method provided by the present invention.

[0102] Those skilled in the art will appreciate that the present invention may be provided as a method, system, or computer program product. Therefore, the present invention may take the form of a hardware embodiment, a software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) containing computer-usable program code.

[0103] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0104] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0105] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0106] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention.

Claims

1. A backup power supply module, characterized in that: The backup power module is arranged in the smart container, and includes: a battery management board and a lithium battery pack; wherein, The battery management board is connected to the lithium battery pack, and the battery management board is respectively connected to the microcontroller MCU of the smart container and the Android mainboard of the smart container; The battery management board is used to: when the battery management board is connected to the mains, determine the working state of the lithium battery pack according to the mains voltage and control the lithium battery pack to switch to the working state; Wherein, the working state of the lithium battery pack includes: charging state and power supply state; Wherein, the backup power module further includes: a switch element, wherein the switch element is arranged between the positive electrode of the lithium battery pack and the positive electrode of the battery management board, or the switch element is arranged between the negative electrode of the lithium battery pack and the negative electrode of the battery management board; wherein, The switch element is used for: The branch circuit between the lithium battery pack and the battery management board is connected, or the branch circuit between the lithium battery pack and the battery management board is disconnected.

2. The backup power supply module according to claim 1, characterized in that: The battery management board is used for: When the battery management board is connected to the mains power and the mains power voltage is greater than a preset threshold voltage, the mains power is used to charge the lithium battery pack so that the lithium battery pack is in the charging state; When the battery management board is connected to the mains power and the mains power voltage is less than or equal to the preset threshold voltage, the lithium battery pack is controlled to supply power to the smart container so that the lithium battery pack is in the power supply state.

3. The backup power supply module according to claim 2, characterized in that: The battery management board is also used for: When the battery management board is not connected to the mains, it is determined that the lithium battery pack is in the power supply state, and the lithium battery pack is controlled to supply power to the smart container so that the lithium battery pack is in the power supply state.

4. The backup power supply module according to claim 1, characterized in that: The output feedback terminal of the lithium battery pack is connected to the input feedback terminal of the battery management board; wherein, The lithium battery pack is also used for: Transmitting a first feedback signal to the battery management board via an output feedback terminal of the lithium battery pack and an input feedback terminal of the battery management board; Wherein, the first feedback signal is used to feedback the working status of the lithium battery pack.

5. The backup power supply module according to claim 1, characterized in that: The output feedback end of the battery management board is connected to the input feedback end of the smart container; wherein, The battery management board is also used for: Transmitting a second feedback signal to the MCU of the smart container through the output feedback terminal of the battery management board and the input feedback terminal of the smart container; The second feedback signal is used to feed back the working status of the lithium battery pack determined by the battery management board.

6. A smart container, characterized in that: It comprises the backup power supply module as described in any one of claims 1 to 5 above.

7. A control method, characterized in that: The method is applied to the battery management board in the backup power module according to claims 1 to 5, and includes: When the battery management board is connected to the mains, the working state of the lithium battery pack is determined according to the mains voltage and the lithium battery pack is controlled to switch to the working state; Wherein, the working state of the lithium battery pack includes: charging state and power supply state.

8. The method according to claim 7, characterized in that When the battery management board is connected to the mains, determining the working state of the lithium battery pack according to the mains voltage includes: When the battery management board is connected to the mains power and the mains power voltage is greater than a preset threshold voltage, the mains power is used to charge the lithium battery pack so that the lithium battery pack is in the charging state; When the battery management board is connected to the mains power and the mains power voltage is less than or equal to the preset threshold voltage, the lithium battery pack is controlled to supply power to the smart container so that the lithium battery pack is in the power supply state.

9. The method according to claim 7 or 8, characterized in that: The method further comprises: When the battery management board is not connected to the mains, the lithium battery pack is controlled to supply power to the smart container so that the lithium battery pack is in the power supply state.

10. A battery management board, characterized in that: The battery management board is arranged in the smart container according to claim 6, and comprises: A determination module, used for determining the working state of the lithium battery pack and controlling the lithium battery pack to switch to the working state according to the voltage of the mains when the battery management board is connected to the mains; Wherein, the working state of the lithium battery pack includes: charging state and power supply state.

11. A battery management board, characterized in that: include: A processor and a storage medium storing instructions executable by the processor, wherein the storage medium relies on the processor to perform operations via a communication bus, and when the instructions are executed by the processor, the control method described in claim 7 or 8 is executed.

12. A computer storage medium, characterized in that: Executable instructions are stored, and when the executable instructions are executed by one or more processors, the processors execute the control method as claimed in claim 7 or 8.

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