Control circuit and method for mainboard and display panel of battery management system

Abstract

The invention provides a control circuit and method for a mainboard and a display panel of a battery management system, and the method is characterized in that the first end of a first interface in a mainboard circuit is connected with the first end of a second interface in a display panel circuit through a communication circuit, and the output end of the first interface is connected with the receiving end of the second interface through the communication circuit; the receiving end of the first interface is connected with the output end of the second interface through the communication circuit, and the fourth end of the first interface is connected with the fourth end of the second interface through the communication circuit; and the control mainboard circuit and the display panel circuit perform data communication according to the key detection state in the display panel circuit and the communication circuit so as to realize a mainboard startup and shutdown function and a display panel startup and shutdown function. The control circuit provided by the invention has the characteristics of low standby power consumption, optimized interface circuit design, simplified manufacturing process and low cost.

Description

Technical Field

[0001] The present application relates to the technical field of battery management systems, and in particular to a control circuit and method for a battery management system mainboard and a display panel. Background Art

[0002] In the design of electronic products, modular design is a common approach. A complete set of products is often composed of multiple independent module circuits. Modular thinking makes the combination of modules more flexible. In the design of the battery management system, the voltage and current of the battery management board and other information need to be displayed on the display screen. This involves the interface docking problem between the two modules, but the combination of the two needs to consider compatibility and adaptability, and consider factors such as power supply, data communication, control management, and standby power consumption. In the existing technology, such as Figure 1 The functions associated with the two modules of the mainboard and display board shown in the figure are designed separately. Specifically, the mainboard power-on function circuit is designed separately. When the display board button is pressed, it forms a loop with the mainboard power-on control circuit to power on the mainboard. The display board power-on function circuit is designed separately. When the display board is not working, the MCU outputs a signal to activate the display board to power on. The communication circuit is designed separately. When both modules are powered on, they are responsible for data communication. However, Figure 1 The presence of more MCU IO ports increases the MCU task processing, the number of connecting wires between modules and the number of interface PINs increase, the material cost increases, and the complexity of the production process increases, which is not conducive to production and manufacturing. Therefore, how to more simply realize the control of the battery management system motherboard and display board has become a technical issue that cannot be underestimated. Summary of the invention

[0003] In view of this, the purpose of the present application is to provide a control circuit and method for a battery management system mainboard and a display panel. The circuit identifies the button status, combines the power supply line and the control signal line into one, and combines software communication commands to realize data communication between the mainboard and the display panel to perform the mainboard power on / off function and the display panel power on / off function. It has the characteristics of low power standby, optimized interface circuit design, and simplified manufacturing process to reduce costs.

[0004] The embodiment of the present application provides a control circuit for a battery management system mainboard and a display panel, wherein the control circuit includes a mainboard circuit, a display panel circuit and a communication circuit; wherein:

[0005] The first end of the first interface in the main board circuit is connected to the first end of the second interface in the display board circuit through the communication circuit, the output end of the first interface is connected to the receiving end of the second interface through the communication circuit, the receiving end of the first interface is connected to the output end of the second interface through the communication circuit, and the fourth end of the first interface is connected to the fourth end of the second interface through the communication circuit;

[0006] The mainboard circuit and the display panel circuit are controlled to perform data communication according to the key detection state in the display panel circuit and the communication circuit to realize the mainboard power on / off function and the display panel power on / off function.

[0007] In a possible implementation manner, the mainboard circuit further includes a first diode, a first resistor, a first capacitor, a first power input subcircuit, a voltage stabilization subcircuit, a first upper electronic circuit and a first micro control unit; wherein,

[0008] The first resistor is connected in parallel with the first capacitor;

[0009] The first end of the first interface is respectively connected to the cathode end of the first diode, the first end of the first resistor, the first end of the first micro control unit and the power input end, the anode end of the first diode is connected to the first end of the voltage stabilizing subcircuit, the second end of the voltage stabilizing subcircuit is connected to the first end of the first power input subcircuit, and the second end of the first power input subcircuit is connected to the second end of the first resistor and the first end of the first upper electronic circuit;

[0010] The second end of the first upper electronic circuit is connected to the second end of the first micro control unit, the third end of the first micro control unit is connected to the output end of the first interface, and the fourth end of the first micro control unit is connected to the receiving end of the first interface.

[0011] In a possible implementation manner, the display panel circuit further includes a second resistor, a second capacitor, a second upper electronic circuit, a detection subcircuit, a second microcontroller unit and a second power input subcircuit; wherein,

[0012] The first end of the second interface is respectively connected to the first end of the second resistor, the first end of the second power input subcircuit and the power input end, the second end of the second power input subcircuit is connected to the first end of the second capacitor, and the second end of the second capacitor is connected to the receiving end of the second interface;

[0013] The receiving end of the second interface is connected to the first end of the second micro control unit, the output end of the second interface is connected to the second end of the second micro control unit, the fourth end of the second interface is connected to the third end of the second micro control unit, the fourth end of the second micro control unit is connected to the first end of the detection sub-circuit, the second end of the detection sub-circuit is connected to the second end of the second resistor, the fifth end of the second micro control unit is connected to the first end of the second upper electronic circuit, and the second end of the second upper electronic circuit is connected to the second end of the second capacitor.

[0014] In a possible implementation manner, the first power input sub-circuit includes a third resistor, a fourth resistor and a first MOS transistor; wherein,

[0015] The drain of the first MOS tube is connected to the first end of the third resistor, the second end of the third resistor is respectively connected to the gate of the first MOS tube and the first end of the fourth resistor, the second end of the fourth resistor is connected to the second end of the first resistor, and the source of the first MOS tube is connected to the second end of the voltage stabilizing sub-circuit.

[0016] In a possible implementation manner, the first upper electronic circuit includes a fifth resistor, a sixth resistor and a second MOS transistor; wherein,

[0017] The drain of the second MOS tube is connected to the second end of the fourth resistor, the gate of the first MOS tube is respectively connected to the first end of the fifth resistor and the first end of the sixth resistor, the second end of the sixth resistor is connected to the second end of the first micro control unit, and the source of the second MOS tube is connected to the second end of the fifth resistor and grounded.

[0018] In a possible implementation manner, the value of the second capacitor is related to the baud rate.

[0019] The embodiment of the present application also provides a control method for a battery management system mainboard and a display panel, the control method comprising:

[0020] When the second micro control unit detects that the key state in the detection subcircuit is in the pressed state, it controls the first resistor, the first capacitor and the first power input subcircuit to form a ground loop, so that the first MOS tube is in a conducting state. After the first MOS tube is turned on, the mainboard is in a powered-on working state to realize the power-on function of the mainboard;

[0021] When the mainboard is powered on, the first micro control unit is controlled to output a high level and transmit it to the second MOS tube so that the first MOS tube is in a low voltage state, thereby completing the normal power supply of the mainboard;

[0022] After the mainboard is powered normally, the voltage stabilizing subcircuit that controls the mainboard circuit supplies power to the display panel through the communication circuit, and controls the mainboard circuit and the display panel circuit to communicate data based on the button detection status and the communication circuit to realize the mainboard shutdown function and the display panel power on / off function.

[0023] In a possible implementation, for the display panel power-on function, controlling the mainboard circuit and the display panel circuit to perform data communication based on the key detection state and the communication circuit to implement the mainboard power-off function and the display panel power-on / off function includes:

[0024] Controlling the display panel circuit to receive data information transmitted by the main board circuit based on the communication circuit so that the receiving end of the second interface is in a low level state;

[0025] When the receiving end of the second interface is in a low level state, the MOS tube in the second power input subcircuit is controlled to be in an open state based on the pull-down path formed by the second capacitor and the resistor in the second power input subcircuit;

[0026] The second micro control unit is controlled to output a high level to the MOS tube in the second upper electronic circuit so as to complete the startup of the display panel.

[0027] In a possible implementation manner, for the display panel shutdown function, controlling the mainboard circuit and the display panel circuit to perform data communication based on the key detection state and the communication circuit to implement the mainboard shutdown function and the display panel power on / off function includes:

[0028] When the second micro control unit detects the shutdown signal of the display panel circuit, the fifth terminal of the second micro control unit is controlled to output a low level signal to put the MOS tube in the second power input subcircuit in the cut-off state, thereby completing the shutdown of the display panel.

[0029] In a possible implementation manner, for the mainboard shutdown function, controlling the mainboard circuit and the display panel circuit to perform data communication based on the key detection state and the communication circuit to implement the mainboard shutdown function and the display panel power on / off function includes:

[0030] When the second micro control unit detects the mainboard shutdown signal, the shutdown signal is transmitted to the mainboard circuit so that the second end of the first micro control unit outputs a low level to put the second MOS tube and the first MOS tube in a closed state to complete the shutdown of the mainboard.

[0031] The embodiment of the present application provides a control circuit and method for a battery management system mainboard and display panel, the control circuit includes a mainboard circuit, a display panel circuit and a communication circuit; wherein the first end of the first interface in the mainboard circuit is connected to the first end of the second interface in the display panel circuit through the communication circuit, the output end of the first interface is connected to the receiving end of the second interface through the communication circuit, the receiving end of the first interface is connected to the output end of the second interface through the communication circuit, and the fourth end of the first interface is connected to the fourth end of the second interface through the communication circuit; the mainboard circuit and the display panel circuit are controlled to perform data communication according to the key detection state in the display panel circuit and the communication circuit to realize the mainboard power on / off function and the display panel power on / off function. The circuit recognizes the key state, and simultaneously uses the power supply line and the control signal line in two-in-one, and combines the software communication command to realize the data communication between the mainboard and the display panel to perform the mainboard power on / off function and the display panel power on / off function, and has the characteristics of low power standby, optimized interface circuit design, simplified manufacturing process and reduced cost.

[0032] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 It is a structural schematic diagram of the control circuit of the battery management system mainboard and the display panel in the prior art;

[0035] Figure 2 One of the structural schematic diagrams of a control circuit for a battery management system mainboard and a display panel provided in an embodiment of the present application;

[0036] Figure 3 The second structural schematic diagram of a control circuit for a battery management system mainboard and a display panel provided in an embodiment of the present application;

[0037] Figure 4 A flow chart of a control method for a battery management system mainboard and a display panel provided in an embodiment of the present application;

[0038] Figure 5 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application.

[0039] Icons: 200-control circuit of battery management system main board and display board; 210-main board circuit; 211-first diode; 212-first resistor; 213-first capacitor; 214-first power input sub-circuit; 2141-third resistor; 2142-fourth resistor; 2143-first MOS tube; 215-voltage stabilizing sub-circuit; 216-first upper electronic circuit; 2161-fifth resistor; 2162-sixth resistor; 2163-second MOS tube; 217-first micro control unit; 220-display board circuit; 221-second resistor; 222-second capacitor; 223-second upper electronic circuit; 224-detection sub-circuit; 225-second micro control unit; 226-second power input sub-circuit; 230-communication circuit; 500-electronic equipment; 510-processor; 520-memory; 530-bus. DETAILED DESCRIPTION

[0040] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application usually described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, each other embodiment obtained by those skilled in the art without making creative work belongs to the scope of protection of the present application.

[0041] First, the application scenarios to which the present application is applicable are introduced. The present application can be applied to the technical field of battery management systems.

[0042] Research has found that modular design is a common approach in electronic product design. A complete set of products is often composed of multiple independent module circuits. Modular thinking makes the combination of modules more flexible. In the design of a battery management system, the voltage and current of the battery management board and other information need to be displayed on the display screen. This involves the interface docking problem between the two modules, but the combination of the two needs to consider compatibility and adaptability, and consider factors such as power supply, data communication, control management, and standby power consumption. In the existing technology, such as Figure 1The functions associated with the two modules of the mainboard and display board shown in the figure are designed separately. Specifically, the mainboard power-on function circuit is designed separately. When the display board button is pressed, it forms a loop with the mainboard power-on control circuit to power on the mainboard. The display board power-on function circuit is designed separately. When the display board is not working, the MCU outputs a signal to activate the display board to power on. The communication circuit is designed separately. When both modules are powered on, they are responsible for data communication. However, Figure 1 The presence of more MCU IO ports increases the MCU task processing, the number of connecting wires between modules and the number of interface PINs increase, the material cost increases, and the complexity of the production process increases, which is not conducive to production and manufacturing. Therefore, how to more simply realize the control of the battery management system motherboard and display board has become a technical issue that cannot be underestimated.

[0043] Based on this, an embodiment of the present application provides a control circuit for a battery management system mainboard and a display panel. The circuit identifies the button status, combines the power supply line and the control signal line into one, and combines software communication commands to realize data communication between the mainboard and the display panel to perform the mainboard power on / off function and the display panel power on / off function. It has the characteristics of low power standby, optimized interface circuit design, and simplified manufacturing process to reduce costs.

[0044] See also Figure 2 , Figure 2 This is one of the structural schematic diagrams of a control circuit 200 for a battery management system mainboard and a display panel provided in an embodiment of the present application. Figure 2 As shown in the figure, the control circuit 200 for the battery management system mainboard and display panel provided in the embodiment of the present application includes a mainboard circuit 210, a display panel circuit 220 and a communication circuit 230.

[0045] Specifically, the first end of the first interface in the main board circuit 210 is connected to the first end of the second interface in the display panel circuit 220 through the communication circuit 230, the output end of the first interface is connected to the receiving end of the second interface through the communication circuit 230, the receiving end of the first interface is connected to the output end of the second interface through the communication circuit 230, and the fourth end of the first interface is connected to the fourth end of the second interface through the communication circuit 230; the main board circuit 210 and the display panel circuit 220 are controlled to perform data communication according to the button detection status in the display panel circuit 220 and the communication circuit 230 to realize the main board power on / off function and the display panel power on / off function.

[0046] For example, the first interface and the second interface are four-wire interfaces, and the power on / off function of the main board and the power on / off function of the display panel are realized through the connection among the first interface, the second interface and the communication circuit 230 .

[0047] Wherein, the communication circuit may be an RS232 communication circuit.

[0048] In this application, only 4 wires of the RS323 communication circuit 230 are used to realize the data communication function between the two modules of the main board and the display board, the communication activation function, the main board power on and off function, and the display board shutdown function. This not only reduces the interface wires and saves costs, but also reduces the production process costs and improves the appearance.

[0049] For further information, see Figure 3 , Figure 3 This is a second structural diagram of a control circuit 200 for a battery management system mainboard and a display panel provided in an embodiment of the present application. Figure 2 As shown, the main board circuit 210 further includes a first diode 211 , a first resistor 212 , a first capacitor 213 , a first power input subcircuit 214 , a voltage stabilizing subcircuit 215 , a first upper electronic circuit 216 and a first micro control unit 217 .

[0050] Specifically, the first resistor 212 is connected in parallel with the first capacitor 213; the first end of the first interface is respectively connected to the negative end of the first diode 211, the first end of the first resistor 212, the first end of the first micro control unit 217 and the power input end, the positive end of the first diode 211 is connected to the first end of the voltage stabilizing sub-circuit 215, the second end of the voltage stabilizing sub-circuit 215 is connected to the first end of the first power input sub-circuit 214, the second end of the first power input sub-circuit 214 is connected to the second end of the first resistor 212 and the first end of the first upper electronic circuit 216; the second end of the first upper electronic circuit 216 is connected to the second end of the first micro control unit 217, the third end of the first micro control unit 217 is connected to the output end of the first interface, and the fourth end of the first micro control unit 217 is connected to the receiving end of the first interface.

[0051] For example, the main function of adding the first diode 211 in the mainboard circuit 210 is to isolate the 5V power supply from the power input control power-on signal line, because the 5V power supply is also connected to other power supply branches in the circuit with low impedance to the ground. The diode isolation here avoids the problem that the first power input subcircuit 214 is directly turned on without pressing the key when there is power input. In order to reduce power consumption, the Schottky diode is not selected here because the Schottky diode has large reverse leakage.

[0052] For further information, see Figure 2 The display panel circuit 220 further includes a second resistor 221 , a second capacitor 222 , a second upper electronic circuit 223 , a detection subcircuit 224 , a second micro control unit 225 and a second power input subcircuit 226 .

[0053] Specifically, the first end of the second interface is respectively connected to the first end of the second resistor 221, the first end of the second power input subcircuit 226 and the power input end, the second end of the second power input subcircuit 226 is connected to the first end of the second capacitor 222, and the second end of the second capacitor 222 is connected to the receiving end of the second interface; the receiving end of the second interface is connected to the first end of the second micro control unit 225, the output end of the second interface is connected to the second end of the second micro control unit 225, the fourth end of the second interface is connected to the third end of the second micro control unit 225, the fourth end of the second micro control unit 225 is connected to the first end of the detection subcircuit 224, the second end of the detection subcircuit 224 is connected to the second end of the second resistor 221, the fifth end of the second micro control unit 225 is connected to the first end of the second upper electronic circuit 223, and the second end of the second upper electronic circuit 223 is connected to the second end of the second capacitor 222.

[0054] For example, the selected value of the second capacitor 222 is related to the baud rate, otherwise the gate of the MOS tube in the input sub-circuit of the second capacitor 222 cannot be pulled down by the low level of the receiving end of the second interface, so the charging time of the second capacitor 222 is less than one binary code element time. For example, when the baud rate B=9600, one code element time is T=1 / B≈104us. In order to ensure the charging and discharging time of the second capacitor 222, the charging and discharging time constant of the second capacitor 222 needs to be less than one code element time 104us.

[0055] For further information, see Figure 2 The first power input sub-circuit 214 includes a third resistor 2141, a fourth resistor 2142 and a first MOS tube 2143.

[0056] Specifically, the drain of the first MOS tube 2143 is connected to the first end of the third resistor 2141, the second end of the third resistor 2141 is respectively connected to the gate of the first MOS tube 2143 and the first end of the fourth resistor 2142, the second end of the fourth resistor 2142 is connected to the second end of the first resistor 212, and the source of the first MOS tube 2143 is connected to the second end of the voltage stabilizing sub-circuit 215.

[0057] For further information, see Figure 2 The first upper electronic circuit 216 includes a fifth resistor 2161, a sixth resistor 2162 and a second MOS tube 2163.

[0058] Specifically, the drain of the second MOS tube 2163 is connected to the second end of the fourth resistor 2142, the gate of the first MOS tube 2143 is respectively connected to the first end of the fifth resistor 2161 and the first end of the sixth resistor 2162, the second end of the sixth resistor 2162 is connected to the second end of the first micro control unit 217, and the source of the second MOS tube 2163 is connected to the second end of the fifth resistor 2161 and grounded.

[0059] The second upper electronic circuit 223 in the display panel circuit 220 is consistent with the structure of the first upper electronic circuit 216, and the second power input subcircuit 226 is consistent with the first power input subcircuit 214, which will not be described in detail. The detection subcircuit 224 is composed of a diode, a resistor, a capacitor and a button.

[0060] The beneficial effects of this application are as follows: 1. Reduce system energy complexity: By utilizing the power supply and communication circuit 230 to realize data communication and power management of the two modules, no other additional control circuit 200 is added on the basis of maintaining the original functions, reducing MCU task processing, and facilitating the stable operation of the system. 2. Reduce lead interference input: The interface circuit is optimized. The interface circuit design reduces the interface leads by sharing the power line and the RX communication line, reduces the interface impedance problem of the wire connection, the control signal loop lead length problem, reduces the interference input of the leads and other problems caused by the interface. 3. Reduce costs and improve the aesthetics of the process: Reduce interface leads, reduce manufacturing costs and material costs, improve the aesthetics of the process, and also facilitate the subsequent repair and maintenance of the product.

[0061] Here, the functional circuits of each part of the existing technical solution are designed independently, and independent control lines are required for the mainboard startup and the display panel startup, which increases the number of leads and interface pins. There are interface impedance problems in the wire connection, and the control signal loop leads become longer, which will increase the risk of introducing interference. The mainboard startup of this technical solution uses the power line shared by the display panel buttons to form a loop with the mainboard startup circuit to realize the startup function, and there is no need to design a separate button startup circuit; the display panel startup also uses the communication signal to activate the startup, and there is no need to design a separate startup control line, which saves the control leads between the two modules, reduces noise interference input, and optimizes the interface connection.

[0062] Among them, the existing technical solution increases the number of connecting wires and interface pins between modules, and the interface is 6 pins, which increases the production process cost and is not beautiful. This technical solution only uses the 4 wires that come with it to realize the data communication function between the mainboard and the display board, the communication activation function, the mainboard power on and off function, and the display board power off function, which not only reduces the interface wires and saves costs, but also reduces the production process cost and improves the appearance.

[0063] In a specific embodiment, when a button in the display panel circuit 220 is pressed, the components in the first power input subcircuit 214 and the first resistor 212 and the first capacitor 213 form a ground loop through the common power line, so that the gate of the first MOS tube 2143 is pulled down to form a GS voltage, thereby causing the first MOS tube 2143 to be turned on, and the main board is powered on. At the same time, the first micro control unit 217 (MCU) of the main board quickly outputs a high level to the second MOS tube 2163 after being powered on, so that the gate of the first MOS tube 2143 remains pulled low. At this time, the power supply of the main board is no longer dependent on the status information of the button, and the power-on lock is implemented to maintain normal power supply to realize the function of starting the main board. After the main board is powered on, a 5V voltage is provided to the display panel through the voltage stabilizing subcircuit 215. When the mainboard is powered on and provides power input to the display panel, the communication circuit 230 works. When the mainboard sends data to the display panel, the receiving end of the second interface of the display panel changes from a high level to a low level. The second capacitor 222 and the resistor in the second power input sub-point library form a pull-down path so that the MOS tube in the second power input sub-circuit 226 is turned on. The second microcontroller unit 225 (MCU) is powered on and quickly outputs a high level to the MOS tube in the second upper electronic circuit 223, so that the gate of the MOS tube in the second upper electronic circuit 223 remains pulled low. At this time, the power supply of the display panel is powered on and locked to maintain the power supply normally to complete the startup of the display panel. VDD is the working power supply of the entire display panel. When the display needs to be turned off, long press the button and release it. The second micro control unit 225 detects the shutdown signal. The fifth terminal of the second micro control unit 225 outputs a low level to turn off the MOS tube in the second upper electronic circuit 223, which in turn causes the MOS tube in the second power input sub-circuit 226 to be cut off. The VDD terminal at the rear end of the second power input sub-circuit 226 is powered off to turn off the display panel. Since the input power is completely cut off, the display panel does not consume power in this state. When the main board needs to be shut down, three consecutive presses on the button of the display panel. When the second micro control unit 225 detects the shutdown signal, the shutdown command is transmitted to the main board circuit 210 through the communication circuit. The second micro control unit 225 analyzes and judges the shutdown. The second terminal of the second micro control unit 225 outputs a low level to turn off the second MOS tube 2163, and then the first MOS tube 2143 is also cut off, completing the shutdown of the main board power. Since the input power is completely cut off, the main board does not consume power in this state.

[0064] In this application, when the mainboard needs to be turned on, the mainboard and the display panel form a loop by pressing the display panel button to trigger the mainboard to turn on. At this time, the mainboard provides power to the display panel and sends a communication signal to the display panel to activate the display panel to turn on. When the display panel is turned off, long press the display panel button, and the display panel MCU executes the display panel shutdown according to the button detection information. When the mainboard needs to be shut down, the display panel button is pressed three times in a row, and the display panel reads the button detection information and transmits it to the mainboard through the communication circuit, and the mainboard executes the shutdown. The button detection and the necessary circuits are realized by using only one button detection and communication to manage the power on and off of the power supply, without adding any additional control circuits.

[0065] The embodiment of the present application provides a control circuit for a battery management system mainboard and a display panel, the control circuit includes a mainboard circuit, a display panel circuit and a communication circuit; wherein the first end of the first interface in the mainboard circuit is connected to the first end of the second interface in the display panel circuit through the communication circuit, the output end of the first interface is connected to the receiving end of the second interface through the communication circuit, the receiving end of the first interface is connected to the output end of the second interface through the communication circuit, and the fourth end of the first interface is connected to the fourth end of the second interface through the communication circuit; the mainboard circuit and the display panel circuit are controlled to perform data communication according to the key detection state in the display panel circuit and the communication circuit to realize the mainboard power on / off function and the display panel power on / off function. The circuit recognizes the key state, and simultaneously uses the power supply line and the control signal line in two-in-one, and realizes the data communication between the mainboard and the display panel in combination with the software communication command to perform the mainboard power on / off function and the display panel power on / off function, and has the characteristics of low power standby, optimized interface circuit design, simplified manufacturing process and reduced cost.

[0066] See also Figure 4 , Figure 4 The present invention provides a flow chart of a control method for a battery management system mainboard and a display panel. Figure 4 As shown in , the control method provided by the embodiment of the present application includes:

[0067] S401: When the second micro control unit detects that the button state in the detection subcircuit is in the pressed state, it controls the first resistor, the first capacitor and the first power input subcircuit to form a ground loop to put the first MOS tube in a conducting state. After the first MOS tube is turned on, the mainboard is in a powered-on working state to realize the power-on function of the mainboard.

[0068] In this step, when the second microcontroller unit detects that the button state in the detection subcircuit is in the pressed state information, the first resistor, the first capacitor and the first power input subcircuit form a ground loop, causing the first MOS tube to be in the on state. After the first MOS tube is turned on, the mainboard is in the power-on working state to realize the power-on function of the mainboard.

[0069] S402: When the mainboard is powered on, the first micro control unit is controlled to output a high level and transmit it to the second MOS tube so that the first MOS tube is in a low voltage state, thereby completing the normal power supply of the mainboard.

[0070] In this step, when the main board is powered on, the first micro control unit is controlled to output a high level and transmit it to the second MOS tube to put the first MOS tube in a low voltage state, thereby completing the normal power supply of the main board. At this time, the power supply of the main board no longer depends on the button, and the power-on lock is achieved to keep the power supply normal.

[0071] S403: After the mainboard is powered normally, the voltage stabilizing subcircuit of the mainboard circuit is controlled to supply power to the display panel through the communication circuit, and the mainboard circuit and the display panel circuit are controlled to communicate data based on the key detection status and the communication circuit to realize the mainboard shutdown function and the display panel power on / off function.

[0072] In this step, after the mainboard is powered normally, the voltage stabilizing subcircuit of the mainboard circuit is controlled to supply power to the display panel through the communication circuit, and the mainboard circuit and the display panel circuit are controlled to communicate data according to the key detection status and the communication circuit to realize the mainboard shutdown function and the display panel power on and off function.

[0073] In a possible implementation, for the display panel power-on function, controlling the mainboard circuit and the display panel circuit to perform data communication based on the key detection state and the communication circuit to implement the mainboard power-off function and the display panel power-on / off function includes:

[0074] (1): Control the display panel circuit to receive data information transmitted by the main board circuit based on the communication circuit so that the receiving end of the second interface is in a low level state.

[0075] Here, the control display panel circuit receives the data information transmitted by the main board circuit according to the communication circuit so that the receiving end of the second interface is in a low level state.

[0076] (2): When the receiving end of the second interface is in a low level state, the MOS tube in the second power input subcircuit is controlled to be in an open state based on the pull-down path formed by the second capacitor and the resistor in the second power input subcircuit.

[0077] Here, when the receiving end of the second interface is in a low level state, the MOS tube in the second power input subcircuit is controlled to be in an open state according to the pull-down path formed by the second capacitor and the resistor in the second power input subcircuit.

[0078] (3): Control the second micro control unit to output a high level to the MOS tube in the second upper electronic circuit to complete the startup of the display panel.

[0079] Here, the second micro control unit is controlled to output a high level to the MOS tube in the second upper electronic circuit so as to complete the startup of the display panel.

[0080] In a possible implementation manner, for the display panel shutdown function, controlling the mainboard circuit and the display panel circuit to perform data communication based on the key detection state and the communication circuit to implement the mainboard shutdown function and the display panel power on / off function includes:

[0081] When the second micro control unit detects the shutdown signal of the display panel circuit, the fifth terminal of the second micro control unit is controlled to output a low level signal to put the MOS tube in the second power input subcircuit in the cut-off state, thereby completing the shutdown of the display panel.

[0082] In a possible implementation manner, for the mainboard shutdown function, controlling the mainboard circuit and the display panel circuit to perform data communication based on the key detection state and the communication circuit to implement the mainboard shutdown function and the display panel power on / off function includes:

[0083] When the second micro control unit detects the mainboard shutdown signal, the shutdown signal is transmitted to the mainboard circuit so that the second end of the first micro control unit outputs a low level to put the second MOS tube and the first MOS tube in a closed state to complete the shutdown of the mainboard.

[0084] Here, the specific implementation method of controlling the main board circuit and the display board circuit based on the button detection status and the communication circuit to perform data communication to realize the main board power on / off function and the display board power on / off function is consistent with the specific implementation method in the control circuit, and this part will not be repeated.

[0085] The embodiment of the present application provides a control method for a battery management system mainboard and a display panel, the control method comprising: when the second micro control unit detects that the key state in the detection subcircuit is in the pressed state information, controlling the first resistor, the first capacitor and the first power input subcircuit to form a ground loop, so that the first MOS tube is in the conducting state, and after the first MOS tube is turned on, the mainboard is in the power-on working state to realize the power-on function of the mainboard; when the mainboard is powered on, the first micro control unit is controlled to output a high level and transmit it to the second MOS tube so that the first MOS tube is in a low voltage state, completing the normal power supply of the mainboard; after the mainboard is powered on, the voltage stabilizing subcircuit of the mainboard circuit is controlled to supply power to the display panel through the communication circuit, and the mainboard circuit and the display panel circuit are controlled to communicate data based on the key detection state and the communication circuit to realize the mainboard shutdown function and the display panel power on / off function. The circuit recognizes the key state, and at the same time, the power supply line and the control signal line are used in two-in-one mode, and the data communication between the mainboard and the display panel is combined with the software communication command to realize the mainboard power on / off function and the display panel power on / off function, and has the characteristics of low power consumption standby, optimized interface circuit design, simplified manufacturing process and reduced cost.

[0086] See also Figure 5 , Figure 5 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. Figure 5 As shown in , the electronic device 500 includes a processor 510 , a memory 520 and a bus 530 .

[0087] The memory 520 stores machine-readable instructions executable by the processor 510. When the electronic device 500 is running, the processor 510 communicates with the memory 520 via the bus 530. When the machine-readable instructions are executed by the processor 510, the above-mentioned Figure 4 The steps of the control method for the battery management system mainboard and the display panel in the method embodiment and the specific implementation method can be found in the method embodiment, which will not be repeated here.

[0088] The present application also provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the computer program can execute the above-mentioned Figure 4 The steps of the control method for the battery management system mainboard and the display panel in the method embodiment shown, the specific implementation method can be referred to the method embodiment, and will not be repeated here.

[0089] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0090] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, and the indirect coupling or communication connection of devices or units can be electrical, mechanical or other forms.

[0091] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0092] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0093] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a non-volatile computer-readable storage medium that is executable by a processor. Based on this understanding, the technical solution of the present application can essentially be embodied in the form of a software product, or in other words, the part that contributes to the prior art or the part of the technical solution. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0094] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application, rather than to limit them. The protection scope of the present application is not limited thereto. Although the present application is described in detail with reference to the above-mentioned embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-mentioned embodiments within the technical scope disclosed in the present application, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A control circuit for a battery management system mainboard and a display panel, characterized in that: The control circuit includes a main board circuit, a display board circuit and a communication circuit; wherein, The first end of the first interface in the main board circuit is connected to the first end of the second interface in the display board circuit through the communication circuit, the output end of the first interface is connected to the receiving end of the second interface through the communication circuit, the receiving end of the first interface is connected to the output end of the second interface through the communication circuit, and the fourth end of the first interface is connected to the fourth end of the second interface through the communication circuit; The mainboard circuit and the display panel circuit are controlled to perform data communication according to the key detection state in the display panel circuit and the communication circuit to realize the mainboard power on / off function and the display panel power on / off function.

2. The control circuit according to claim 1, characterized in that: The mainboard circuit also includes a first diode, a first resistor, a first capacitor, a first power input subcircuit, a voltage stabilization subcircuit, a first upper electronic circuit and a first micro control unit; wherein, The first resistor is connected in parallel with the first capacitor; The first end of the first interface is respectively connected to the cathode end of the first diode, the first end of the first resistor, the first end of the first micro control unit and the power input end, the anode end of the first diode is connected to the first end of the voltage stabilizing subcircuit, the second end of the voltage stabilizing subcircuit is connected to the first end of the first power input subcircuit, and the second end of the first power input subcircuit is connected to the second end of the first resistor and the first end of the first upper electronic circuit; The second end of the first upper electronic circuit is connected to the second end of the first micro control unit, the third end of the first micro control unit is connected to the output end of the first interface, and the fourth end of the first micro control unit is connected to the receiving end of the first interface.

3. The control circuit according to claim 1, characterized in that: The display panel circuit also includes a second resistor, a second capacitor, a second upper electronic circuit, a detection subcircuit, a second micro control unit and a second power input subcircuit; wherein, The first end of the second interface is respectively connected to the first end of the second resistor, the first end of the second power input subcircuit and the power input end, the second end of the second power input subcircuit is connected to the first end of the second capacitor, and the second end of the second capacitor is connected to the receiving end of the second interface; The receiving end of the second interface is connected to the first end of the second micro control unit, the output end of the second interface is connected to the second end of the second micro control unit, the fourth end of the second interface is connected to the third end of the second micro control unit, the fourth end of the second micro control unit is connected to the first end of the detection sub-circuit, the second end of the detection sub-circuit is connected to the second end of the second resistor, the fifth end of the second micro control unit is connected to the first end of the second upper electronic circuit, and the second end of the second upper electronic circuit is connected to the second end of the second capacitor.

4. The control circuit according to claim 2, characterized in that: The first power input subcircuit includes a third resistor, a fourth resistor and a first MOS tube; wherein, The drain of the first MOS tube is connected to the first end of the third resistor, the second end of the third resistor is respectively connected to the gate of the first MOS tube and the first end of the fourth resistor, the second end of the fourth resistor is connected to the second end of the first resistor, and the source of the first MOS tube is connected to the second end of the voltage stabilizing sub-circuit.

5. The control circuit according to claim 4, characterized in that: The first upper electronic circuit includes a fifth resistor, a sixth resistor and a second MOS tube; wherein, The drain of the second MOS tube is connected to the second end of the fourth resistor, the gate of the first MOS tube is respectively connected to the first end of the fifth resistor and the first end of the sixth resistor, the second end of the sixth resistor is connected to the second end of the first micro control unit, and the source of the second MOS tube is connected to the second end of the fifth resistor and grounded.

6. The control circuit according to claim 3, characterized in that: The value of the second capacitor is related to the baud rate.

7. A control method for a battery management system mainboard and a display panel, characterized in that: The control method is applied to the control circuit according to any one of claims 1 to 6, and the control method includes: When the second micro control unit detects that the key state in the detection subcircuit is in the pressed state, it controls the first resistor, the first capacitor and the first power input subcircuit to form a ground loop, so that the first MOS tube is in a conducting state. After the first MOS tube is turned on, the mainboard is in a powered-on working state to realize the power-on function of the mainboard; When the mainboard is powered on, the first micro control unit is controlled to output a high level and transmit it to the second MOS tube so that the first MOS tube is in a low voltage state, thereby completing the normal power supply of the mainboard; After the mainboard is powered normally, the voltage stabilizing subcircuit that controls the mainboard circuit supplies power to the display panel through the communication circuit, and controls the mainboard circuit and the display panel circuit to communicate data based on the button detection status and the communication circuit to realize the mainboard shutdown function and the display panel power on / off function.

8. The control method according to claim 7, characterized in that: For the display panel power-on function, the control of the mainboard circuit and the display panel circuit to perform data communication based on the key detection state and the communication circuit to realize the mainboard power-off function and the display panel power-on and power-off function includes: Controlling the display panel circuit to receive data information transmitted by the main board circuit based on the communication circuit so that the receiving end of the second interface is in a low level state; When the receiving end of the second interface is in a low level state, the MOS tube in the second power input subcircuit is controlled to be in an open state based on the pull-down path formed by the second capacitor and the resistor in the second power input subcircuit; The second micro control unit is controlled to output a high level to the MOS tube in the second upper electronic circuit so as to complete the startup of the display panel.

9. The control method according to claim 7, characterized in that: For the display panel shutdown function, the control of the mainboard circuit and the display panel circuit to perform data communication based on the key detection state and the communication circuit to realize the mainboard shutdown function and the display panel power on / off function includes: When the second micro control unit detects the shutdown signal of the display panel circuit, the fifth terminal of the second micro control unit is controlled to output a low level signal to put the MOS tube in the second power input subcircuit in the cut-off state, thereby completing the shutdown of the display panel.

10. The control method according to claim 7, characterized in that: For the mainboard shutdown function, the mainboard circuit and the display panel circuit are controlled to perform data communication based on the key detection state and the communication circuit to realize the mainboard shutdown function and the display panel power on / off function, including: When the second micro control unit detects the mainboard shutdown signal, the shutdown signal is transmitted to the mainboard circuit so that the second end of the first micro control unit outputs a low level to put the second MOS tube and the first MOS tube in a closed state to complete the shutdown of the mainboard.

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