Start-stop control method and device, power system and computer readable storage medium

Abstract

The invention provides a start-stop control method, a start-stop control device, a power system and a computer readable storage medium. The start-stop control method comprises the following steps: determining a current running mode of a local machine; controlling a switch module of a local machine to operate according to a control strategy corresponding to the current operation mode; wherein when the switch module operates in the off state, the electric connection path between the battery module and the photovoltaic charging module is switched off, and when the switch module operates in the on state, the electric connection path between the battery module and the photovoltaic charging module is switched on. According to the application, flexible start-stop control can be realized, so that the photovoltaic charging module can charge the battery module in a mode of meeting the charging requirements of the battery module in various scenes.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of battery control technology, and in particular, to a start-stop control method, a start-stop control device, a power system, and a computer-readable storage medium. Background Art

[0002] The photovoltaic charging module can be connected to the battery to charge the battery. In the related art, the electrical connection path between the battery and the photovoltaic charging module is in a normally conductive state, and the photovoltaic charging module can continuously charge the battery. However, the battery may be in different usage scenarios. In different usage scenarios, the way that the photovoltaic charging module always continuously charges the battery is not necessarily the most advantageous way for the battery. In other words, the design of photovoltaic continuous power supply cannot meet the charging needs of the battery in multiple scenarios. Summary of the invention

[0003] An object of embodiments of the present application is to provide a start-stop control method, a start-stop control device, a power system, and a computer-readable storage medium.

[0004] In a first aspect, a start-stop control method is provided, which is applied to a start-stop control device, wherein the start-stop control device is connected to a battery module and a photovoltaic charging module, and the start-stop control method comprises:

[0005] Determine the current operating mode of the unit;

[0006] Controlling the operation of the switch module of the machine according to the control strategy corresponding to the current operation mode;

[0007] Among them, when the switch module operates in the disconnected state, the electrical connection path between the battery module and the photovoltaic charging module is disconnected, and when the switch module operates in the on state, the electrical connection path between the battery module and the photovoltaic charging module is connected.

[0008] In a second aspect, a start-stop control device is provided, which includes a controller and a switch module, wherein the controller is connected to the switch module, and the switch module is connected between the battery module and the photovoltaic charging module, and the controller is used to execute the start-stop control method described in the first aspect above.

[0009] In a third aspect, a power system is provided, which includes a battery module, a photovoltaic charging module and the start-stop control device described in the second aspect.

[0010] In a fourth aspect, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores a computer program, wherein the computer program includes program instructions, and when the program instructions are executed by a processor, the processor executes the start-stop control method as described in the first aspect.

[0011] In the scheme implemented by the above-mentioned start-stop control method, start-stop control device, power system and computer-readable storage medium, a start-stop control device is connected between the battery module and the photovoltaic charging module. The start-stop control device has a switch module, which is used to turn on or off the electrical connection path between the battery module and the photovoltaic charging module. The start-stop control device provides multiple operating modes. Under different operating modes, the start-stop control device can execute different control strategies to control the operation of the switch module, thereby achieving more flexible start-stop control, so that the photovoltaic charging module can charge the battery module in a way that meets the charging needs of the battery module in various scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0013] Figure 1 It is a schematic diagram of a framework of a power system in one embodiment of the present application;

[0014] Figure 2 is a schematic diagram of electrical connections of a power system in one embodiment of the present application;

[0015] Figure 3 This is a circuit diagram of a start-stop control device in one embodiment of the application;

[0016] Figure 4 is a circuit diagram of a battery module in one embodiment of the present application;

[0017] Figure 5 is a circuit diagram of a first switch control circuit in an embodiment of the present application;

[0018] Figure 6 is a circuit diagram of a second switch control circuit in an embodiment of the present application;

[0019] Figure 7 It is a flow chart of a start-stop control method in one embodiment of the present application. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0021] It should be noted that, if there is no conflict, the various features in the embodiments of the present application can be combined with each other, all within the scope of protection of the present application. In addition, although the functional module division is performed in the device schematic diagram and the logical order is shown in the flow chart, in some cases, the steps shown or described can be performed in a sequence different from the module division in the device or the flow chart. Furthermore, the words "first", "second", "third", etc. used in this application do not limit the data and execution order, but only distinguish the same items or similar items with basically the same functions and effects.

[0022] The present application is described in detail below through specific embodiments.

[0023] See also Figure 1 , Figure 1 The schematic diagram of the framework of a power system 10 provided in an embodiment of the present application. The power system 10 can be applied to the fields of household energy storage, vehicles, ships, etc., and the present application does not limit this. The power system 10 includes a battery module 20, a photovoltaic charging module 30, and a start-stop control device 40.

[0024] Please combine Figure 1 and Figure 4 The battery module 20 is a component for storing electrical energy, and generally includes a plurality of battery cells, which may be lithium batteries, nickel-metal hydride batteries, or other types of batteries. The battery module 20 is capable of storing electrical energy provided by a photovoltaic charging module or other energy sources (such as a generator, mains electricity, etc.), and releasing such electrical energy when needed to supply the loads in the power system 10. The battery module 20 may further include a battery management system (BMS). The BMS is connected to the battery cells, and the BMS may perform charge and discharge management of the battery cells, and may also monitor the operating parameters of the battery cells, so as to promptly disconnect the battery charge / discharge circuit when the battery cells are abnormal (such as Figure 4 A high-voltage circuit including a total positive relay and a total negative relay is provided to protect the safety of the battery module 20 or the rear-end load.

[0025] The photovoltaic charging module 30 can convert solar energy into electrical energy to charge the battery module 20. Photovoltaic charging is a clean and efficient charging method that helps reduce dependence on traditional energy.

[0026] The start-stop control device 40 is connected between the battery module 20 and the photovoltaic charging module 30. The start-stop control device 40 is used to open or close the electrical connection path between the battery module 20 and the photovoltaic charging module 30.

[0027] See also Figure 2 , Figure 2 A connection diagram of each module in the power system 10 provided in an embodiment of the present application. The start-stop control device 40 includes a controller 42 and a switch module 41, the controller 42 is connected to the switch module 41, the switch module 41 is connected between the battery module 20 and the photovoltaic charging module 30, and the controller 42 is used to control the operation of the switch module 41. Specifically, the controller 42 can control the switch module 41 to operate in the on state to conduct the electrical connection path between the battery module 20 and the photovoltaic charging module 30, so that the photovoltaic charging module 30 charges the battery module 20; the controller 42 can control the switch module 41 to operate in the off state to disconnect the electrical connection path between the battery module 20 and the photovoltaic charging module 30, thereby stopping the photovoltaic charging module 30 from charging the battery module 20.

[0028] In one possible example, see Figure 3 , Figure 3 Schematic diagram of the circuit of the start-stop control device 40. The start-stop control device 40 further includes a power supply module 43, a key detection module 44, a switch control module 45, a current acquisition module 46, a communication module 47 and an indicator light module 48.

[0029] The power supply module 43 is connected to the controller 42, the key detection module 44, the switch module 41 and the switch control module 45 to supply power to the controller 42, the key detection module 44, the switch module 41 and the switch control module 45, thereby ensuring that these modules can be powered and work. The power supply module 43 can also be connected to the battery module 20 to receive the power provided by the battery module 20.

[0030] As an example, combine Figure 3 The power supply module 43 may include a first DCDC circuit 431, a charging management circuit 432, and a battery 433. The input end of the first DCDC circuit 431 is used to connect to the positive output (P+) of the battery module 20, the output end of the first DCDC circuit 431 is connected to the input end of the charging management circuit 432, the output end of the charging management circuit 432 is connected to the input end of the battery 433, and the output end of the battery 433 is connected to the controller 42.

[0031] The first DCDC circuit 431 is a DC-DC converter, which is used to convert direct current (DC) from one voltage level to another voltage level. In the power supply module 43, the input end of the first DCDC circuit 431 is connected to the battery module 20, and its function is to convert the electric energy output by the battery module 20 into a stable voltage suitable for other components in the start-stop control device 40. Through the first DCDC circuit 431, voltage stabilization and regulation can be achieved to ensure that the subsequent circuit can obtain a stable power supply voltage.

[0032] The charging management circuit 432 is responsible for managing the charging process of the battery 433. It receives the output from the first DCDC circuit 431 and ensures that the battery 433 is charged at a safe voltage and current to prevent overcharging and overheating. The charging management circuit 432 usually has functions such as overvoltage protection, overcurrent protection and temperature monitoring to ensure the long-term stable operation of the battery 433.

[0033] The storage battery 433 is a battery that can be charged and discharged, and it serves as an energy storage unit in the power supply module 43. The input end of the storage battery 433 is connected to the output end of the charging management circuit 432, and receives power from the charging management circuit 432 for charging. When the external power source (such as the battery module 20) is unavailable, the storage battery 433 can provide a backup power source to ensure continuous operation of the system.

[0034] Specifically, the battery module 20 provides electric energy, which is converted into voltage by the first DCDC circuit 431, and the converted electric energy is transmitted to the charging management circuit 432. The charging management circuit 432 optimizes the electric energy, and the processed electric energy is used to charge the battery 433. The output end of the battery 433 is connected to the controller 42 to provide necessary electric energy for the controller 42 and other modules connected to the controller 42 (such as the key detection module 44, the switch control module 45, etc.).

[0035] In this embodiment, the power supply module 43 itself carries a storage battery 433, and can also be connected to the battery module 20 to receive power from the battery module 20. This dual power supply method can ensure that the power supply module 43 can provide stable power to the back-end electrical components such as the control, which is conducive to improving the stability and reliability of the operation of the start-stop control device 40. In addition, since the battery module 20 can supply power to the start-stop control device 40, when the start-stop control device 40 is turned off, if the high-voltage circuit of the battery module 20 is powered on, the start-stop control device 40 can also obtain power and start up. That is, the battery module 20 can trigger the start-stop control device 40 to start. At this time, the user does not need to press the power button of the battery module 20 and the power button of the start-stop control device 40 respectively, and the user's operation is more convenient.

[0036] As an example, please combine Figure 3 The power supply module 43 may further include a second DCDC circuit 435. The input end of the second DCDC circuit 435 is connected to the output end of the battery 433, and the output end of the second DCDC circuit 435 is connected to the controller 42. The second DCDC circuit 435 is used to convert the electric energy output by the battery 433 into a voltage suitable for the operation of the controller 42. In this way, it is ensured that the controller 42 can obtain a suitable and stable operating voltage.

[0037] As an example, please combine Figure 3 The power supply module 43 may further include a battery protection circuit 434. The input end of the battery protection circuit 434 is connected to the output end of the battery 433, and the output end of the battery protection circuit 434 is connected to the input end of the second DCDC circuit 435. The battery protection circuit 434 is mainly used to protect the battery 433 to prevent the battery 433 from being damaged in abnormal conditions such as overcharging, overdischarging, and overcurrent, thereby ensuring that the battery 433 operates within a safe working range and prolonging its service life.

[0038] As an example, please combine Figure 3 The power supply module 43 may also include an isolated DCDC circuit 436, the input end of the isolated DCDC circuit 436 is connected to the output end of the first DCDC circuit 431, and the output end of the isolated DCDC circuit 436 is connected to the switch module 41. The isolated DCDC circuit 436 is a DC-DC converter with an electrical isolation function, and the isolated DCDC circuit 436 is used to provide electrical isolation between different circuits to prevent noise interference and potential electric shock hazards. In the power supply module 43, the input end of the isolated DCDC circuit 436 is connected to the output end of the first DCDC circuit 431, and its output end is connected to the switch module 41, ensuring that the switch module 41 does not introduce noise or cause a circuit short circuit when operating the electrical connection between the battery module 20 and the photovoltaic charging module 30.

[0039] The key detection module 44 is connected to the controller 42. The key detection module 44 is used to detect the user input command, such as power on, power off or mode switching. The key detection module 44 is connected to the controller 42. When the user presses a key, it transmits a signal to the controller 42, and the controller 42 adjusts the operating state of the switch module 41 and other components according to these signals.

[0040] As an example, the key detection module 44 includes a power on / off detection circuit 441 and a mode switching detection circuit 442 .

[0041] Among them, the power on / off detection circuit 441 is used for power on / off detection of the start / stop control device 40 itself. Specifically, one end of the power on / off detection circuit 441 is connected to the power supply module 43 to obtain the electric energy required for work; the other end of the power on / off detection circuit 441 is connected to the controller 42 so as to transmit the signal generated by the power on / off button operation to the controller 42. When the user presses the power on / off button, the circuit will generate a signal. After receiving the signal, the controller 42 will execute the power on / off operation of the start / stop control device 40, which may be to start or shut down the entire start / stop control device. The embodiment of the present application can ensure that the start / stop control device 40 can accurately respond to the user's power on / off instructions by setting the power on / off detection circuit 441 to detect the user's power on / off operation and transmit the signal to the controller 42.

[0042] The mode switching detection circuit 442 is used for mode switching detection of the start-stop control device 40. Specifically, one end of the mode switching detection circuit 442 is connected to the power supply module 43 to obtain the electric energy required for the work; the other end of the mode switching detection circuit 442 is connected to the controller 42 to transmit the mode switching signal to the controller 42. Different modes may include but are not limited to the first operating mode (also referred to as the normally closed mode), the second operating mode (also referred to as the standby charging mode), the third operating mode (also referred to as the standby discharge mode), etc. Specifically, the normally closed mode is that the start-stop control device 40 always remains closed unless the SOC of the battery module 20 reaches a specific threshold. The standby charging mode is that the start-stop control device 40 will decide when to turn on or off the charging according to the SOC of the battery module 20 and the power supply capacity of the photovoltaic charging module 30. The standby discharge mode is that the start-stop control device 40 will manage the discharge of the battery module 20 according to the set timing time to supply the load (such as a water pump. In the marine power system, the water pump needs to be turned on and drained regularly to avoid the sinking accident caused by water accumulation in the cabin). Among them, the standby discharge mode may include multiple sub-modes. When the user presses the mode switching button, the circuit detects this action and sends a corresponding signal to the controller 42. The controller 42 can adjust the working mode of the start-stop control device according to the received signal to adapt to the use requirements of the battery module 20 in various scenarios. The embodiment of the present application detects the user's mode switching operation by setting a mode switching detection circuit 442, and transmits the signal to the controller 42. The controller 42 flexibly executes the control strategy corresponding to various modes according to the signal, so as to meet the use requirements of the battery module 20 in various scenarios.

[0043] Optionally, when the user operates the power button in the power detection circuit 441 to start the start-stop control device 40, the start-stop control device 40 defaults to running in the first running mode. During the operation of the start-stop control device 40, the user can operate the mode switching button in the mode switching detection circuit 442 to switch the mode.

[0044] Optionally, the key operation may generate a jitter signal (i.e., the key is repeatedly contacted and disconnected in a short period of time), and the jitter may cause the control signal to be falsely triggered. Therefore, the start-stop control device 40 may further include a key de-jitter circuit (such as an RC filter), which is used to filter out these jitter signals to ensure that the detected key signal is stable. In addition, a software de-jitter algorithm (implemented in the controller 42) may be added to filter out these jitter signals.

[0045] The switch controller 42 is used to control the switch state of the low-voltage circuit (the electrical connection path between the battery cell and the BMS) of the battery module 20. Specifically, the switch control module 45 is connected to the controller 42 to receive instructions from the controller 42. The switch control module 45 can also be connected to the battery module 20 to open or close the electrical connection path between the battery cell and the BMS according to the instructions of the controller 42 to achieve a change in the operating state of the battery module 20.

[0046] The current acquisition module 46 is used to monitor the charging current of the photovoltaic charging module 30. Specifically, the current acquisition module 46 includes a current acquisition circuit 461 and a sampling resistor. The current acquisition circuit 461 is connected to the controller 42, and the sampling resistor is connected between the battery module 20 and the photovoltaic charging module 30. The current acquisition circuit 461 is connected in parallel with the sampling resistor to collect the current flowing through the sampling resistor. The current acquisition module 46 receives the charging current acquisition instruction sent by the controller 42 module, and performs the detection of the charging current of the photovoltaic charging module 30 according to the charging current acquisition instruction. The current acquisition module 46 can also transmit the charging current data to the controller 42 in real time, so that the controller 42 can adjust the charging strategy according to the current data to prevent the battery module 20 from overcharging. The current acquisition module 46 is connected to the battery module 20 and the photovoltaic charging module 30 at the same time to accurately measure the current between the two.

[0047] The communication module 47 is connected between the controller 42 and the battery module 20 to realize the communication between the controller 42 and the battery module 20. Specifically, the communication module 47 can receive important information such as SOC and high-voltage circuit conduction status transmitted by the battery module 20. The communication module 47 helps the controller 42 to better manage and optimize the operation of the entire power system 10.

[0048] The indicator light module 48 is connected to the controller 42 to display an indicator light pattern that matches the current operating mode of the start-stop control device 40 .

[0049] The indicator light module 48 provides visual feedback. The indicator light module 48 is connected to the controller 42. The controller 42 controls the indicator light module 48 to display the corresponding indicator light mode according to the current operation mode of the start-stop control device 40. The indicator light module 48 displays the current operation mode of the start-stop control device 40 by displaying different colors or different flashing modes, so that the user can intuitively understand the current state and mode of the start-stop control device 40. The indicator light module 48 can also be used to indicate other states of the device, such as insufficient power, fault alarm, etc.

[0050] For example, the indicator light module 48 is composed of 7 LEDs, and the controller 42 controls the LED lights to turn on and off to indicate the current state and mode of the start-stop control device 40. The indicator light module 48 includes 1 operation indicator light and 6 mode indicator lights:

[0051] (1) Power light: indicates the power on / off status of the start / stop control device 40. After the start / stop control device 40 is turned on, the light is always on, indicating that the start / stop control device 40 has been turned on and is running. If the battery module 20 is not in standby mode but the communication of the battery module 20 is lost, the power light flashes, prompting the user that there may be a communication problem in the system.

[0052] (2) Status light 1: When the start-stop control device 40 enters the normally closed mode, the status light 1 is always on, indicating that the start-stop control device 40 is in the normally closed mode.

[0053] (3) Status light 2: When the start-stop control device 40 enters the standby charging mode, the status light 2 is always on, indicating that the start-stop control device 40 is in the standby charging mode.

[0054] (4) Status light 3: When the start-stop control device 40 enters the standby discharge mode 1, the status light 3 is always on, indicating that the system is in the first standby discharge state.

[0055] (5) Status light 4: When the start-stop control device 40 enters the standby discharge mode 2, the status light 4 is always on, indicating that the system is in the second standby discharge state.

[0056] (6) Status light 5: When the start-stop control device 40 enters the standby discharge mode 3, the status light 5 is always on, indicating that the system is in the third standby discharge state.

[0057] (7) Status light 6: When the start-stop control device 40 enters the standby discharge mode 4, the status light 6 is always on, indicating that the system is in the fourth standby discharge state.

[0058] Optionally, additional LED lights can be set or existing LED lights can be made to flash in specific patterns to indicate system errors or failures so that users can quickly identify and take action; or, different colors of LEDs can be used to indicate different statuses, for example, red for warnings or errors, green for normal operation, yellow for standby status, etc.

[0059] For a possible example, see Figure 3 The switch module 41 includes an isolation driving circuit 411 and a switch tube. The isolation driving circuit 411 is connected to the power supply module 43 and the controller 42. The isolation driving circuit 411 is used to drive the switch tube to work.

[0060] The isolation driving circuit 411 is connected to the output end of the isolation DCDC circuit 436 to receive the power provided by the power supply module 43. When receiving the driving instruction from the controller 42, the isolation driving circuit 411 drives the switch tube to work to turn on the switch tube.

[0061] The switch tube includes a first switch tube Q1 and a second switch tube Q2. When the isolation drive circuit 411 receives a drive instruction from the controller 42, the first switch tube Q1 and the second switch tube Q2 are driven to be turned on or off, thereby controlling the connection or disconnection of the battery module 20 and the photovoltaic charging module 30, and realizing the start and stop control of photovoltaic charging.

[0062] Optionally, the switch tube includes a first switch tube Q1 and a second switch tube Q2. The first electrode of the first switch tube Q1 is connected to the isolation drive circuit 411, the second electrode of the first switch tube Q1 is connected to the second electrode of the second switch tube Q2, and the third electrode of the first switch tube Q1 is used to connect the battery module 20. The first electrode of the second switch tube Q2 is connected to the isolation drive circuit 411, and the third electrode of the second switch tube Q2 is used to connect the photovoltaic charging module 30. The first switch tube Q1 and the second switch tube Q2 can be MOS tubes, triodes, etc. Figure 3 The first switch tube Q1 and the second switch tube Q2 are both NMOS tubes for illustration, but this should not be construed as limiting the present application. In this embodiment, the second electrodes of the two switch tubes are connected back to back to prevent current backflow, which is beneficial to improving circuit safety.

[0063] In a possible example, the switch control module 45 includes two control circuits. One end of one of the control circuits is connected to the controller 42, and the other end is used to connect to the power-on circuit of the battery module 20. One end of the other control circuit is connected to the controller 42, and the other end is used to connect to the power-off circuit of the battery module 20.

[0064] As an example, each control circuit includes a third switch tube, one end of the third switch tube is connected to the controller 42, and the other end is connected to the relay; the relay is connected to the power supply module 43 and can be connected to the battery module 20. The third switch tube is used to control the action of the relay.

[0065] For details, please combine Figure 4 and Figure 5, the switch control module 45 includes a first control circuit 451. The first control circuit 451 includes a relay K1 and a third switch tube Q3. The first pole of the third switch tube Q3 is connected to the controller 42, the second pole of the third switch tube Q3 is grounded, and the third pole of the third switch tube Q3 is connected to the relay K1. The two ports K1+ and K1- of the relay K1 are respectively connected to the switch 1 input and switch 1 output ports in the power-on circuit of the battery module 20. When the battery module 20 needs to be turned on, the controller 42 pulls up the level of the CTRL1 port (in other embodiments, the level of the CTRL1 port can also be pulled down) and maintains it for a certain period of time to turn on the third switch tube Q3. After the third switch tube Q3 is turned on, the current provided by the power switch module 41 flows through the coil of the relay K1, so that the contacts of the relay K1 are closed. At this time, the self-locking relay of the battery module 20 is short-circuited, the loop between the battery unit and the voltage conversion module is turned on, and the battery unit can power the BMS. In this way, the power-on wake-up of the battery module 20 is realized.

[0066] Further, such as Figure 5 As shown, the switch control module 45 also includes a resistor R1, a resistor R2, a capacitor C1, a capacitor C2, a diode D1 and a TVS diode D2. Among them, the resistor R1 is a current limiting resistor, which is used to limit the current of the first pole of the third switch tube Q3 and suppress oscillation. The resistor R2 is a pull-down resistor, which is used to ensure the reliable on-off of the third switch tube. The capacitor C1 and the capacitor C2 are used for energy storage on the one hand to ensure the stable power supply of the coil of the relay K1, and on the other hand for filtering, wherein the capacitor C1 and the capacitor C2 are respectively used to filter out signals of different bands, thereby reducing interference and ensuring the stability and safety of the operation of the relay K1. Since the contacts of the relay K1 are disconnected, a back electromotive force will be generated. Therefore, the diode D1 and the TVS diode D2 are set to provide a protection circuit to protect the coil of the relay K1.

[0067] Please combine Figure 4 and Figure 6, the switch control module 45 includes a second control circuit 452. The second control circuit 452 includes a relay K2 and a third switch tube Q4. The first pole of the third switch tube Q4 is connected to the controller 42, the second pole of the third switch tube Q4 is grounded, and the third pole of the third switch tube Q4 is connected to the relay K2. The two ports K2+ and K2- of the relay K2 are respectively connected to the switch 2 in and switch 2 out ports in the power-on circuit of the battery module 20. When the battery module 20 needs to be shut down, the controller 42 pulls up the level of the CTRL2 port (in other embodiments, the level of the CTRL2 port can also be pulled down) and keeps it for a certain period of time to turn on the third switch tube Q4. After the third switch tube Q4 is turned on, the current provided by the power switch module 41 flows through the coil of the relay K3, so that the contacts of the relay K3 are closed. At this time, the BMS in the battery module 20 detects that there is a signal at the PEM signal detection port, and the BMS controls the self-locking relay to disconnect to disconnect the circuit between the battery unit and the voltage conversion module. In this way, the shutdown of the battery module 20 is completed.

[0068] Further, such as Figure 6 As shown, the switch control module 45 also includes a resistor R3, a resistor R4, a capacitor C3, a capacitor C4, a diode D3 and a TVS diode D4. Wherein, the resistor R3 is a current limiting resistor, which is used to limit the current of the first pole of the third switch tube Q4 and suppress oscillation. The resistor R4 is a pull-down resistor, which is used to ensure the reliable on-off of the third switch tube. The capacitor C3 and the capacitor C4 are used for energy storage on the one hand to ensure the stable power supply of the coil of the relay K2, and on the other hand for filtering, wherein the capacitor C3 and the capacitor C4 are respectively used to filter out signals of different bands, thereby reducing interference and ensuring the stability and safety of the operation of the relay K2. Since the contacts of the relay K2 are disconnected, a back electromotive force will be generated, therefore, a diode D3 and a TVS diode D4 are provided to provide a protection circuit to protect the coil of the relay K2.

[0069] See also Figure 7 The present application also provides a start-stop control method. The start-stop control method can be applied to the start-stop control device 40 described in any of the above embodiments and executed by the controller 42 in the start-stop control device 40. The method includes the following steps:

[0070] 01. Determine the current operating mode of the machine.

[0071] The current operation mode refers to the operation state of the start-stop control device 40 at the current moment, which determines how the start-stop control device 40 manages the charging and discharging process of the battery. The operation mode may include but is not limited to the normally closed mode, the standby charging mode, and the standby discharging mode mentioned in the above embodiment.

[0072] 02. Control the operation of the switch module 41 of the machine according to the control strategy corresponding to the current operation mode.

[0073] The control strategy is a set of rules or algorithms that define how the start-stop control device 40 should operate the switch module 41 in different operating modes. The control strategy is intended to ensure that when the battery module 20 is in different usage scenarios, the photovoltaic charging module 30 can charge the battery module 20 in a manner that better meets the charging requirements of the battery module 20 in the corresponding scenario.

[0074] In a possible example, determining the current operating mode of the local machine includes: obtaining a power-on trigger signal that triggers the local machine to power on; and determining the current operating mode according to a source of the power-on trigger signal.

[0075] The power-on trigger signal refers to a signal that starts the power-on process of the start-stop control device 40 .

[0076] Among them, the power-on trigger signal may include but is not limited to: a high-voltage signal on the battery, that is, when the battery module 20 is connected to the system and provides high voltage, the start-stop control device 40 is triggered to power on; a button trigger signal, the user manually triggers the start-stop control device 40 to power on by pressing the power button of the start-stop control device 40 (i.e., power-on operation); a timed wake-up signal, which automatically wakes up the start-stop control device 40 within a set time interval.

[0077] Specifically, the current operation mode is determined based on the source of the power-on trigger signal. Different sources of trigger signals correspond to different operation modes. For example, when the start-stop control device 40 detects a high-voltage signal provided by the battery module 20, it enters the normally closed mode by default; when the user presses the power button of the start-stop control device 40 to trigger the start-stop control device 40 to power on, it enters the standby charging mode by default; when the start-stop control device 40 automatically wakes up within a set time interval, it enters the standby charging mode.

[0078] In this embodiment, the start-stop control device 40 can flexibly adjust its operating mode according to different power-on trigger signals to adapt to usage requirements in different scenarios.

[0079] In a possible example, determining the current operating mode of the local machine includes: while the local machine is powered on, obtaining a mode indication signal generated when the local machine receives a mode switching operation from a user; and determining the current operating mode according to the mode indication signal.

[0080] The mode switching operation may be performed by operating a physical button, a touch screen, a knob, or remote control. Figure 3 The example shown is to switch modes by operating a physical button.

[0081] As an example, when the mode indication signal is the first indication signal, the current operating mode is the normally closed mode; when the mode indication signal is the second indication signal, the current operating mode is the standby charging mode; when the mode indication signal is the third indication signal, the current operating mode is the standby discharging mode.

[0082] Specifically, when the user performs these operations, the corresponding hardware or software module will generate a mode indication signal, and the mode indication signal represents the specific operating mode that the user wants the start-stop control device 40 to enter.

[0083] The user's mode switching operation takes precedence over the automatic mode switching of the start-stop control device 40. When the user issues a mode switching indication signal, the start-stop control device 40 will immediately respond and switch to the corresponding operating mode. After the user performs the mode switching operation, the start-stop control device 40 should provide corresponding feedback (such as LED indicator light, buzzer prompt, etc.) to confirm that the mode switching has been successfully executed.

[0084] This embodiment can respond to the user's direct instructions and can flexibly adjust its operating state according to the user's operating requirements, thereby providing more personalized and intelligent services.

[0085] In this embodiment, through the correspondence between the mode indication signal and the operating mode, the start-stop control device 40 can flexibly adjust its operating state according to different user needs and environmental conditions, thereby achieving efficient energy management and improving user experience.

[0086] In one possible example, when the current operating mode is the normally closed mode, the operation of the switch module 41 of the machine is controlled according to the control strategy corresponding to the current operating mode, including: monitoring the power parameters of the battery module 20; and controlling the operation of the switch module 41 according to the relationship between the power parameters and the power threshold.

[0087] The power parameter refers to the remaining power (SOC, State of Charge) of the battery module 20 .

[0088] Specifically, in the normally closed mode, the control strategy is mainly determined based on the power parameters of the battery module 20. The start-stop control device 40 continuously or periodically monitors the power parameters of the battery module 20. The purpose of monitoring the power parameters is to understand the state of the battery module 20 and make a decision on whether to turn on the switch module 41 accordingly.

[0089] The power threshold is a set of values ​​set by the start-stop control device 40 to determine whether the power of the battery module 20 is within a safe or operable range. The power threshold can be adjusted according to factors such as the type, capacity, and use environment of the battery module 20.

[0090] In a possible example, the operation of the switch module 41 is controlled based on the power parameter, including: when the power parameter is less than or equal to the first power threshold, the switch module 41 is controlled to operate in the on state; when the power parameter is greater than the first power threshold and less than the second power threshold, the switch module 41 is controlled to maintain its current state; when the power parameter is greater than or equal to the second power threshold, the switch module 41 is controlled to operate in the off state. The first power threshold and the second power threshold can be set manually or by the manufacturer at the factory, and are not limited here.

[0091] Among them, in the normally closed mode, if the power parameter is greater than or equal to the second power threshold, the switch module 41 is controlled to operate in the disconnected state, thereby stopping the photovoltaic charging module 30 from charging the battery module 20 to prevent the battery from overcharging.

[0092] Among them, in the normally closed mode, if the power parameter is less than or equal to the first power threshold, the control switch module 41 operates in the on state, that is, the electrical connection path between the battery module 20 and the photovoltaic charging module 30 is turned on, so that the photovoltaic charging module 30 charges the battery module 20, thereby ensuring that the battery module 20 can replenish electrical energy.

[0093] Among them, in the normally closed mode, if the power parameter is greater than the first power threshold and less than the second power threshold, the switch module 41 is controlled to maintain its current state. That is, if the switch module 41 is in the on state at this time, the on state of the switch module 41 is maintained; if the switch module 41 is in the off state at this time, the off state of the switch module 41 is maintained. It can be understood that when the start-stop control device 40 operates in the normally closed mode, the corresponding use scenario of the battery module 20 is usually that the battery module 20 is the back-end load, such as the scene where the power supply of equipment such as power devices and daily loads is provided. At this time, the battery module 20 outputs electric energy to the outside on the one hand, and the photovoltaic charging module 30 supplements electric energy for it on the other hand, then the SOC of the battery module 20 may fluctuate up and down near the first power threshold or the second power threshold. Therefore, when the SOC is greater than the first power threshold and less than the second power threshold, the switch module 41 is controlled to maintain its current state, which can avoid the problem of the switch module 41 repeatedly switching between the on state and the off state, which is conducive to extending the service life of the switch module 41.

[0094] For example, the second power threshold may be 99%, and the first power threshold may be 90%. If SOC≤90%, the electrical connection path between the battery module 20 and the photovoltaic charging module 30 is connected, so that the photovoltaic charging module 30 charges the battery module 20; if 90%<SOC<99%, the current state of the switch module 41 is maintained; if SOC≥99%, the electrical connection path between the battery module 20 and the photovoltaic charging module 30 is disconnected. It should be noted that the above values ​​are only exemplary and cannot be understood as limitations on this application.

[0095] In the normally closed mode of the present embodiment, the start-stop control device 40 intelligently manages the charging process of the battery module 20 according to the SOC value of the battery module 20, that is, when the battery power is low, the battery module 20 and the photovoltaic charging module 30 will be connected to replenish power for the battery module 20, and when the battery power is high, the connection will be disconnected to prevent overcharging, thereby helping to keep the battery module 20 in the best working condition.

[0096] In a possible example, the operation of the switch module 41 of the machine is controlled according to a control strategy corresponding to the current operating mode, and also includes: monitoring the state of the high-voltage circuit of the battery module 20; when the state of the high-voltage circuit is a disconnected state, controlling the switch module 41 to operate in a disconnected state; and controlling the machine to shut down.

[0097] Among them, when it is monitored that the high-voltage circuit is in a disconnected state, it means that there is no electrical connection between the battery module 20 and the rear-end load, which may be due to safety measures designed by the system, user operation, fault protection or other reasons. At this time, the start-stop control device 40 controls the switch module 41 to enter the disconnected state. It can be understood that the photovoltaic charging module 20 charges the battery unit through the high-voltage circuit. When the high-voltage circuit is disconnected, it may be that the user does not want the battery module 20 to supply power to the outside, or the battery module 20 has a fault and needs to disconnect the high-voltage circuit for fault protection. At this time, whether for user needs or safety protection considerations, it is not desired that the high-voltage circuit is closed again to receive the electrical energy of the photovoltaic charging module 20. Therefore, the switch module 41 does not need to be turned on in this state. Furthermore, the start-stop control device 40 can also control the shutdown of the machine and no longer wake up, thereby reducing the power consumption of the start-stop control device 40.

[0098] In one possible example, when the current operating mode is the standby charging mode, the local switch module 41 is controlled to operate according to the control strategy corresponding to the current operating mode, including: sending a power-on signal to the battery module 20 to instruct the battery module 20 to start up; controlling the switch module 41 to operate in a conductive state; monitoring the power parameters of the battery module 20 and the charging current output by the photovoltaic charging module 30; and controlling the operation of the switch module 41 based on the power parameters and the charging current.

[0099] Among them, when the start-stop control device 40 is running in the standby charging mode, the corresponding battery module 20 is usually used in the scenario where the battery module 20 is in the shutdown state (that is, both the high-voltage circuit and the low-voltage circuit are powered off). At this time, in order to realize the charging of the battery module 20 by the photovoltaic charging module 30, the start-stop control device 40 needs to control the battery module 20 to start up first. For example, please combine Figure 3 and Figure 5 The power-on signal may be a signal outputted by the CTRL1 port. After the battery module 20 is powered on, the start-stop control device 40 controls the operation of the switch module 41 according to the power parameter and the charging current.

[0100] The state of the switch module 41 is adjusted according to the monitored power parameters and charging current. For example, if the battery module 20 is low in power, the start-stop control device 40 will keep the switch module 41 in the on state to allow continuous charging; if the battery module 20 is close to full power, the start-stop control device 40 will switch the switch module 41 to the off state to prevent overcharging; if an abnormal charging current is detected, the start-stop control device 40 will immediately disconnect the switch module 41 to protect the battery module 20 and the start-stop control device 40 from damage.

[0101] In this embodiment, the start-stop control device 40 can intelligently manage the charging process in the standby charging mode to ensure that the battery module 20 is effectively charged under the premise of safety.

[0102] In a possible example, the time when the control switch module 41 operates in the on state is later than the time when the power-on signal is sent to the battery module 20 , and the two times are separated by a first preset time length.

[0103] The first preset time length refers to the time interval from sending the power-on signal to the battery module 20 to controlling the switch module 41 to operate in the on state. The first preset time length can be 3s, 5s, 10s or other time, which is not limited here.

[0104] The time of sending the power-on signal to the battery module 20 refers to the initial time, the end time, or any time between the initial time and the end time when the start-stop control device 40 sends the power-on signal to the battery module 20. The time of controlling the switch module 41 to operate in the on state can be the time when the controller 42 sends a driving signal to the switch module 41.

[0105] It is understandable that BMS usually performs adhesion detection on the total positive relay and / or total negative relay of the high-voltage circuit. If the switch module 41 is turned on earlier than the high-voltage circuit, the photovoltaic charging module 30 will transmit electric energy to the battery module 20, and the voltage of the two high-voltage ports P+ and P- is not 0. When the BMS detects that the voltage of the two high-voltage ports P+ and P- is not 0, it will determine that the total positive relay and / or the total negative relay are adhered, and report the adhesion fault. In this way, a false alarm of the fault is caused. Therefore, the switch module 41 needs to be turned on later than the high-voltage circuit to avoid false alarm faults and ensure the normal operation of the power system 10.

[0106] In one possible example, the operation of the switch module 41 is controlled based on the power parameter and the charging current, including: when the power parameter is less than the second power threshold and the charging current reaches the first current threshold, the switch module 41 is controlled to operate in the on state; when the power parameter is less than the second power threshold and the charging current is less than the first current threshold, the switch module 41 is controlled to operate in the off state; a shutdown signal is sent to the battery module 20 to instruct the battery module 20 to shut down; after a second preset time interval, the power-on signal is returned to the step of sending the power-on signal to the battery module 20 to instruct the battery module 20 to start up; when the power parameter reaches the second power threshold, the power-off signal is sent to the battery module 20 to instruct the battery module 20 to shut down; and the shutdown of the device is controlled.

[0107] The first current threshold may be 2A, which is not a unique limit here. Further, the first current threshold is used to determine whether charging is effective. If the charging current is lower than this threshold, it may indicate that the photovoltaic charging module 30 cannot provide a large charging current to charge the battery module 20.

[0108] The second preset duration may be one hour or other time, and is not limited here.

[0109] Among them, when the power of the battery module 20 is lower than the set second power threshold (for example, 99%), and the charging current reaches the set first current threshold (for example, 2A), at this time, it means that the power of the battery module 20 is not fully charged, and the photovoltaic charging module 30 can provide more electric energy. Therefore, the start-stop control device 40 determines that it is suitable to charge at this time, and controls the switch module 41 to be turned on, allowing the photovoltaic charging module 30 to charge the battery module 20. When the power of the battery module 20 is lower than the second power threshold, but the charging current is insufficient (less than 2A), it means that the photovoltaic charging module 30 cannot provide more electric energy at this time. If the photovoltaic charging module 30 is allowed to charge the battery module 20, it may happen that the self-consumption of the battery module 20 is more than the electric energy provided by the photovoltaic charging module 30, and the power of the battery module 20 is reduced instead. Therefore, the start-stop control device 40 determines that it is not suitable to continue charging at this time, and controls the switch module 41 to be turned off to stop charging. Furthermore, the start-stop control device 40 sends a shutdown signal to the battery module 20 to ensure that the battery module 20 is safely shut down. After waiting for a period of time (a second preset time), the start-stop control device 40 controls the high voltage on the battery module 20 again to retry charging. When the power of the battery module 20 reaches or exceeds the second power threshold, the start-stop control device 40 determines that the battery module 20 is fully charged or reaches the set charging target. The start-stop control device 40 sends a shutdown signal to the battery module 20 to ensure that the battery module 20 is safely shut down to stop charging, and controls the battery module 20 to shut down to reduce energy consumption.

[0110] In this embodiment, the start-stop control device 40 can optimize the charging efficiency and reduce energy consumption while ensuring the safe charging of the battery module 20 .

[0111] In one possible example, when the power parameter is less than the second power threshold and the charging current is less than the first current threshold, the control switch module 41 operates in the disconnected state, including: when the power parameter is less than the second power threshold, the local device communicates normally with the battery module 20, and the charging current is less than the first current threshold for a third preset time period, the control switch module 41 operates in the disconnected state.

[0112] Among them, the third preset time length can be ten minutes or other time, and there is no sole limitation here.

[0113] It is understandable that the charging current less than the second current threshold may be caused by current fluctuations in the circuit or the fact that the sunlight is blocked by clouds or the like for a short period of time, resulting in the photovoltaic charging module 30 being unable to provide a larger charging current. The power parameters may not be sent from the battery module 20 to the start-stop control device 40 in time due to communication anomalies, resulting in the inability to perform accurate comparison of the power parameters with the second power threshold. These situations may lead to the interruption of the charging process. In order to avoid the battery module 20 frequently switching between the power-on state and the power-off state, and the switch module 41 frequently switching between the on state and the off state, it is necessary to control the battery module 20 to shut down and the switch module 41 to disconnect after the above three conditions are met and continue for a period of time.

[0114] This embodiment ensures that the battery module 20 can be charged in time when it is not fully charged, and during the charging process, if the charging current is detected to be lower than the preset value, it indicates that the charging efficiency is reduced. At this time, the start-stop control device 40 interrupts the charging process to reduce the energy consumption of the battery module 20.

[0115] In a possible example, when the current operating mode is the standby discharge mode, the switch module 41 of the machine is controlled to operate according to the control strategy corresponding to the current operating mode, including: monitoring the power parameters of the battery module 20; and controlling the operation of the switch module 41 based on the power parameters.

[0116] Among them, when the start-stop control device 40 operates in the standby charging mode, the corresponding battery module 20 is usually used in a scenario where the battery module 20 is in a shutdown state, but needs to be awakened periodically to power loads such as a water pump. In the standby discharge mode, the start-stop control device 40 detects the power consumption of the battery module 20 to ensure that the battery module 20 will not be over-discharged. And the start-stop control device 40 dynamically adjusts the operating state of the switch module 41 according to the change of the power parameter to achieve effective battery management.

[0117] Among them, if the power of the battery module 20 is higher than a set threshold (for example, sufficient power), the switch module 41 may remain in the on state, allowing the battery module 20 to discharge to the outside; if the power of the battery module 20 is lower than another set threshold (for example, insufficient power), in order to protect the battery module 20 from excessive discharge, the start-stop control device 40 may switch the switch module 41 to the off state to stop discharging; in some cases, the start-stop control device 40 may activate a warning when the power of the battery module 20 drops to a certain level, prompting the user to charge or reduce power consumption.

[0118] In this embodiment, the discharge process of the battery module 20 can be effectively managed in the standby discharge mode, ensuring that the battery module 20 can provide stable power when needed, and protecting the battery module 20 from damage when the power is insufficient.

[0119] In one possible example, the operation of the switch module 41 is controlled based on the power parameter, including: when the power parameter is greater than or equal to the second power threshold, the switch module 41 is controlled to operate in the disconnected state; when the power parameter is greater than the first power threshold and less than the second power threshold, the switch module 41 is controlled to maintain its current state; when the power parameter is less than or equal to the first power threshold and greater than the third power threshold, the switch module 41 is controlled to operate in the on state; when the power parameter is less than or equal to the third power threshold, a shutdown signal is sent to the battery module 20 to instruct the battery module 20 to shut down; and the shutdown of the battery module 20 is controlled.

[0120] The third power threshold may be 10%, which is used to determine whether the battery module 20 is too low in power and needs to be shut down for protection. The third power threshold may be set manually or by the manufacturer at the time of shipment, and is not limited here.

[0121] Among them, when the power parameter is greater than or equal to the second power threshold, it can indicate that the battery module 20 has sufficient power. In order to prevent the battery module 20 from overcharging, the start-stop control device 40 will control the switch module 41 to operate in the disconnected state to stop further charging of the battery module 20.

[0122] When the power parameter is greater than the first power threshold and less than the second power threshold, it indicates that the power of the battery module 20 is at a medium level, and the start-stop control device 40 will decide whether to continue charging or maintain the current state according to current needs and environmental conditions.

[0123] When the power parameter is less than or equal to the first power threshold and greater than the third power threshold, it means that the power of the battery module 20 has dropped to a certain level, but there is still enough power for the device to use. At this time, the start-stop control device 40 will control the switch module 41 to operate in the on state, allowing the battery module 20 to be charged and ensuring that the battery module 20 can supply power to the rear-end load.

[0124] When the power parameter is less than or equal to the third power threshold, since the third power threshold is the minimum safety level of the power of the battery module 20, for example, 10%, when the power drops to this level, in order to protect the battery module 20 from damage, the start-stop control device 40 will send a shutdown signal to the battery module 20, instructing the battery module 20 to shut down, and control the shutdown to prevent the battery module 20 from over-discharging.

[0125] In this embodiment, the operating state of the switch module 41 can be intelligently controlled at different power levels, thereby optimizing the use efficiency and life of the battery module 20 and ensuring stable operation of the device.

[0126] In a possible example, the start-stop control method also includes, before monitoring the power parameters of the battery module 20, sending a power-on signal to the battery module 20 to instruct the battery module 20 to start up; sending a power-off signal to the battery module 20 at an interval of a fourth preset time length to instruct the battery module 20 to shut down; and returning to execute the step of sending a power-on signal to the battery module 20 after an interval of a fifth preset time length.

[0127] Among them, the fourth preset time length can be 1 hour, 6 hours, etc., and there is no sole limitation here.

[0128] Among them, the fifth preset time length can be 1 hour, 6 hours, etc., and there is no sole limitation here.

[0129] For example, the standby discharge mode includes four sub-modes (also called standby discharge states). In the first sub-mode (i.e., the first standby discharge state), the fourth preset time is 1 hour, and the fifth preset time is 1 hour; in the second sub-mode (i.e., the second standby discharge state), the fourth preset time is 6 hours, and the fifth preset time is 3 hours; in the third sub-mode (i.e., the third standby discharge state), the fourth preset time is 12 hours, and the fifth preset time is 6 hours; in the fourth sub-mode (i.e., the fourth standby discharge state), the fourth preset time is 24 hours, and the fifth preset time is 8 hours.

[0130] Among them, before starting to monitor the power parameters of the battery module 20, the start-stop control device 40 first sends a power-on signal to the battery module 20. The function of the power-on signal is to wake up the battery module 20, so that it enters the working state and prepares for charging and / or discharging operations. After the battery module 20 is turned on, the start-stop control device 40 controls the switch module 41 to be turned on to power the battery module 20. The battery module 20 also supplies power to the rear-end load. If the power of the battery module 20 is not lower than the third power threshold during the operation of the battery module 20, the battery module 20 will continue to run for a fourth preset time, and after this period of time, the start-stop control device 40 sends a shutdown signal to the battery module 20, indicating that the battery module 20 enters a low power consumption or sleep state to save energy and extend the life of the battery module 20. After sending the shutdown signal, the start-stop control device 40 will wait for the fifth preset time. After the fifth preset time, the start-stop control device 40 returns and re-executes the step of sending the power-on signal, thereby forming a periodic start-stop control cycle. If the battery module 20 has been in the on-state for less than the fourth preset time, the power level of the battery module 20 is lower than the third power threshold. In order to prevent excessive discharge of the battery module 20, the start-stop control device 40 will control the battery module 20 to shut down, and will no longer wake up the battery module 20, and will also control the device to shut down.

[0131] In this embodiment, through this periodic start-stop control method, the start-stop control device 40 can put the battery module 20 into a low power consumption state when it is not needed to work, thereby saving energy and extending the service life of the battery module 20. At the same time, regular startup ensures that the battery module 20 can supply power to necessary equipment and ensure the normal operation of the power system 10.

[0132] In a possible example, the start-stop control method further includes: monitoring the charging current of the photovoltaic charging module 30 while the switch module 41 is operating in the on state; and controlling the switch module 41 to operate in the off state when the charging current is greater than the second current threshold.

[0133] For example, when the charging current is greater than 50A, the switch module 41 is controlled to be disconnected to protect the battery module 20 from being damaged by the large current, thereby ensuring that the charging process is carried out within a safe and effective range.

[0134] In this embodiment, the abnormal situation of the charging current of the photovoltaic charging module 30 is monitored, and then the switch module 41 is disconnected, that is, the circuit connection between the battery module 20 and the photovoltaic charging module 30 is cut off, thereby stopping the charging process and preventing safety problems caused by excessive current.

[0135] In one possible example, when the charging current is greater than the second current threshold, the switch module 41 is controlled to operate in the disconnected state, including: after the charging current is greater than the second current threshold and lasts for a seventh preset time, the switch module 41 is controlled to operate in the disconnected state. The seventh preset time is, for example, 3s, etc., and this application does not limit this. In this way, the situation where the switch module 41 frequently switches states due to short-term current fluctuations can be avoided, which is conducive to extending the service life of the switch module 41.

[0136] In one possible example, after controlling the switch module 41 to operate in the off state, the start-stop control method further includes: controlling the switch module 41 to operate in the on state after a sixth preset time interval; and returning to the step of monitoring the charging current of the photovoltaic charging module 30 during the period when the switch module 41 operates in the on state.

[0137] The sixth preset time length may be ten seconds, which is not a sole limitation. The sixth preset time length is to provide a buffer time for the start-stop control device 40 so that the charging current may return to a normal range or so that the conditions that may cause the current abnormality may be alleviated.

[0138] After the start-stop control device 40 detects that the charging current exceeds the second current threshold and thus places the switch module 41 in the disconnected state, charging is not stopped permanently, but a waiting time, ie, a sixth preset time duration, is set.

[0139] After the sixth preset time, the start-stop control device 40 will try to turn on the switch module 41 to resume the charging process. The selection of this time interval should be based on a comprehensive consideration of the response time of the start-stop control device 40 and the charging safety.

[0140] After the switch module 41 is turned on again, the start-stop control device 40 will continue to monitor the charging current of the photovoltaic charging module 30 to confirm whether the charging has returned to normal. If the charging current exceeds the second current threshold again, the start-stop control device 40 will again disconnect the switch module 41 and may repeat the above-mentioned waiting and retrying process.

[0141] In this embodiment, the start-stop control device 40 is allowed not to completely stop charging immediately when a short-term current abnormality occurs, but to be given a certain opportunity to self-correct, which helps to avoid unnecessary charging interruptions while ensuring the safety of the start-stop control device 40.

[0142] It should be noted that, in each of the above-mentioned embodiments, there is not necessarily a certain order between the above-mentioned steps. A person skilled in the art can understand, based on the description of the embodiments of the present application, that in different embodiments, the above-mentioned steps may have different execution orders, that is, they may be executed in parallel, may be executed interchangeably, and so on.

[0143] The embodiment of the present application further provides a computer-readable storage medium. The computer-readable storage medium stores a computer program. The computer program includes program instructions, and when the program instructions are executed by a processor, the processor executes the start-stop control method described in any of the above embodiments.

[0144] The storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM) or a random access memory (RAM).

[0145] In the start-stop control method, the start-stop control device 40, the power system 10 and the computer-readable storage medium of the present application, a start-stop control device 40 is connected between the battery module 20 and the photovoltaic charging module 30. The start-stop control device 40 has a switch module 41, and the switch module 41 is used to conduct or disconnect the electrical connection path between the battery module 20 and the photovoltaic charging module 30. The start-stop control device 40 provides a variety of operating modes. In different operating modes, the start-stop control device 40 can execute different control strategies to control the operation of the switch module 41, thereby achieving more flexible start-stop control, so that the photovoltaic charging module 30 can charge the battery module 20 in a manner that meets the charging needs of the battery module 20 in various scenarios.

[0146] The above disclosure is only the preferred embodiment of the present application, which certainly cannot be used to limit the scope of rights of the present application. Therefore, equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A start-stop control method, characterized in that: Applied to a start-stop control device, the start-stop control device is connected to a battery module and a photovoltaic charging module, and the start-stop control method includes: determining the current operation mode of the machine; controlling the operation of the switch module of the machine according to a control strategy corresponding to the current operation mode; wherein, when the switch module operates in a disconnected state, the electrical connection path between the battery module and the photovoltaic charging module is disconnected, and when the switch module operates in a conductive state, the electrical connection path between the battery module and the photovoltaic charging module is conductive.

2. The start-stop control method according to claim 1, characterized in that: The determining of the current operation mode of the machine includes: obtaining a power-on trigger signal for triggering the machine to power on; and determining the current operation mode according to a source of the power-on trigger signal.

3. The start-stop control method according to claim 1, characterized in that: The determining of the current operation mode of the machine includes: when the machine is powered on, obtaining a mode indication signal generated when the machine receives a mode switching operation from a user; and determining the current operation mode according to the mode indication signal.

4. The start-stop control method according to claim 2, characterized in that: When the power-on trigger signal is a power-on trigger signal provided by the battery module, the current operating mode is the first operating mode; when the power-on trigger signal is a power-on trigger signal generated by the local device when receiving a power-on operation from a user, the current operating mode is the second operating mode.

5. The start-stop control method according to claim 3, characterized in that: When the mode indication signal is the first indication signal, the current operating mode is the first operating mode; when the mode indication signal is the second indication signal, the current operating mode is the second operating mode; when the mode indication signal is the third indication signal, the current operating mode is the third operating mode.

6. The start-stop control method according to claim 4 or 5, characterized in that: When the current operating mode is the first operating mode, controlling the operation of the switch module of the machine according to the control strategy corresponding to the current operating mode includes: monitoring the power parameters of the battery module; and controlling the operation of the switch module according to the relationship between the power parameters and the power threshold.

7. The start-stop control method according to claim 6, characterized in that: The controlling the operation of the switch module based on the power parameter includes: when the power parameter is less than or equal to a first power threshold, controlling the switch module to operate in an on state; when the power parameter is greater than the first power threshold and less than a second power threshold, controlling the switch module to maintain its current state; when the power parameter is greater than or equal to the second power threshold, controlling the switch module to operate in an off state.

8. The start-stop control method according to claim 6, characterized in that: The method of controlling the operation of the switch module of the machine according to the control strategy corresponding to the current operation mode also includes: monitoring the state of the high-voltage circuit of the battery module; when the state of the high-voltage circuit is a disconnected state, controlling the switch module to operate in a disconnected state; and controlling the machine to shut down.

9. The start-stop control method according to claim 4 or 5, characterized in that: When the current operating mode is the second operating mode, the operation of the switch module of the machine is controlled according to the control strategy corresponding to the current operating mode, including: sending a power-on signal to the battery module to instruct the battery module to start up; controlling the switch module to operate in a conductive state; monitoring the power parameters of the battery module and the charging current output by the photovoltaic charging module; and controlling the operation of the switch module based on the power parameters and the charging current.

10. The start-stop control method according to claim 9, characterized in that: The time when the switch module is controlled to operate in the on state is later than the time when the power-on signal is sent to the battery module, and the two times are separated by a first preset time length.

11. The start-stop control method according to claim 9, characterized in that: The control of the operation of the switch module based on the power parameter and the charging current includes: when the power parameter is less than a second power threshold and the charging current reaches a first current threshold, controlling the switch module to operate in an on state; when the power parameter is less than the second power threshold and the charging current is less than the first current threshold, controlling the switch module to operate in an off state; sending a shutdown signal to the battery module to instruct the battery module to shut down; after an interval of a second preset time, returning to the step of sending a power-on signal to the battery module to instruct the battery module to start up; when the power parameter reaches the second power threshold, sending a shutdown signal to the battery module to instruct the battery module to shut down; controlling the shutdown of the battery module.

12. The start-stop control method according to claim 11, characterized in that: When the power parameter is less than the second power threshold and the charging current is less than the first current threshold, the switch module is controlled to operate in the disconnected state, including: when the power parameter is less than the second power threshold, the local device communicates normally with the battery module, and the charging current is less than the first current threshold for a third preset time, the switch module is controlled to operate in the disconnected state.

13. The start-stop control method according to claim 4 or 5, characterized in that: When the current operating mode is the third operating mode, controlling the operation of the switch module of the machine according to the control strategy corresponding to the current operating mode includes: monitoring the power parameters of the battery module; and controlling the operation of the switch module based on the power parameters.

14. The start-stop control method according to claim 13, characterized in that: The control of the operation of the switch module based on the power parameter includes: when the power parameter is greater than or equal to the second power threshold, controlling the switch module to operate in the disconnected state; when the power parameter is greater than the first power threshold and less than the second power threshold, controlling the switch module to maintain its current state; when the power parameter is less than or equal to the first power threshold and greater than the third power threshold, controlling the switch module to operate in the on state; when the power parameter is less than or equal to the third power threshold, sending a shutdown signal to the battery module to instruct the battery module to shut down; controlling the shutdown of the battery module.

15. The start-stop control method according to claim 14, characterized in that: The start-stop control method also includes, before monitoring the power parameters of the battery module: sending a power-on signal to the battery module to instruct the battery module to start up; sending a power-off signal to the battery module at an interval of a fourth preset time to instruct the battery module to shut down; and returning to execute the step of sending the power-on signal to the battery module after an interval of a fifth preset time.

16. The start-stop control method according to claim 1, characterized in that: The start-stop control method further includes: monitoring the charging current of the photovoltaic charging module while the switch module is operating in the on state; and controlling the switch module to operate in the off state when the charging current is greater than a second current threshold.

17. The start-stop control method according to claim 16, characterized in that: The start-stop control method further includes, after controlling the switch module to operate in the disconnected state: controlling the switch module to operate in the on state after a sixth preset time interval; and returning to the step of monitoring the charging current of the photovoltaic charging module during the period when the switch module operates in the on state.

18. A start-stop control device, characterized in that: The start-stop control device includes a controller and a switch module, the controller is connected to the switch module, the switch module is connected between the battery module and the photovoltaic charging module, and the controller is used to execute the start-stop control method described in any one of claims 1-17.

19. The start-stop control device according to claim 18, characterized in that: The start-stop control device also includes a power supply module, a button detection module, a switch control module, a current acquisition module and a communication module; the power supply module is connected to the controller, the button detection module and the switch control module to supply power to the controller, the button detection module and the switch control module, and the power supply module can also be connected to the battery module to receive the electric energy provided by the battery module; the button detection module is connected to the controller; the switch control module is connected to the controller, and the switch control module can also be connected to the battery module to indicate the switch of the battery module; the current acquisition module is connected to the controller and can connect the battery module to the photovoltaic charging module, and the current acquisition module is used to detect the charging current of the photovoltaic charging module; the communication module is connected to the controller, and the communication module can also be connected to the battery module to realize communication between the controller and the battery module.

20. The start-stop control device according to claim 19, characterized in that: The power supply module includes a first DCDC circuit, a charging management circuit, and a battery. The input end of the first DCDC circuit is used to connect the battery module, the output end of the first DCDC circuit is connected to the input end of the charging management circuit, the output end of the charging management circuit is connected to the input end of the battery, and the output end of the battery is connected to the controller.

21. The start-stop control device according to claim 20, characterized in that: The power supply module further includes an isolated DCDC circuit, the input end of the isolated DCDC circuit is connected to the output end of the first DCDC circuit, and the output end of the isolated DCDC circuit is connected to the switch module; and / or the power supply module further includes a second DCDC circuit, the input end of the second DCDC circuit is connected to the output end of the battery, and the output end of the second DCDC circuit is connected to the controller; and / or the power supply module further includes a battery protection circuit, the input end of the battery protection circuit is connected to the output end of the battery, and the output end of the battery protection circuit is connected to the input end of the second DCDC circuit of the power supply module.

22. The start-stop control device according to claim 19, characterized in that: The button detection module includes a power on / off detection circuit and a mode switching detection circuit; one end of the power on / off detection circuit is connected to the power supply module, and the other end of the power on / off detection circuit is connected to the controller, and the power on / off detection circuit is used for the power on / off detection of the start / stop control device itself; one end of the mode switching detection circuit is connected to the power supply module, and the other end of the mode switching detection circuit is connected to the controller, and the mode switching detection circuit is used for the mode switching detection of the start / stop control device.

23. The start-stop control device according to claim 18, characterized in that: The start-stop control device also includes an indicator light module, which is connected to the controller to display an indicator light mode that matches the current operating mode.

24. The start-stop control device according to claim 19, characterized in that: The switch module includes an isolation drive circuit and a switch tube. The isolation drive circuit is connected to the power supply module and the controller. The isolation drive circuit is used to drive the switch tube to work.

25. The start-stop control device according to claim 24, characterized in that: The switch tube includes a first switch tube and a second switch tube; the first electrode of the first switch tube is connected to the isolation drive circuit, the second electrode of the first switch tube is connected to the second electrode of the second switch tube, and the third electrode of the first switch tube is used to connect to the battery module; The first pole of the second switch tube is connected to the isolation drive circuit, and the third pole of the second switch tube is used to connect to the photovoltaic charging module.

26. The start-stop control device according to claim 19, characterized in that: The switch control module includes two control circuits; one end of one of the control circuits is connected to the controller, and the other end is used to connect to the power-on circuit of the battery module; one end of the other control circuit is connected to the controller, and the other end is used to connect to the power-off circuit of the battery module.

27. The start-stop control device according to claim 26, characterized in that: Each of the control circuits includes a relay and a third switch tube, one end of the third switch tube is connected to the controller, and the other end is connected to the relay; the relay is connected to the power supply module and can be connected to the battery module.

28. A power system, characterized in that: It comprises a battery module, a photovoltaic charging module and a start-stop control device as described in any one of claims 18 to 27.

29. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, wherein the computer program includes program instructions, and when the program instructions are executed by a processor, the processor is enabled to perform the method according to any one of claims 1 to 17.

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