electrical equipment

Abstract

The present application relates to an electrical device, wherein a main control board includes a main control chip and a wake-up circuit, and a battery management board includes a battery management chip and a battery wake-up circuit; the battery wake-up circuit is connected to a first charging interface via a second charging interface, and the wake-up circuit outputs a wake-up voltage to wake up the main control chip and the battery management chip; or the battery wake-up circuit is connected to a first communication interface via a second communication interface, and the wake-up circuit outputs a wake-up voltage to wake up the main control chip, and the main chip outputs a wake-up pulse to turn on the battery wake-up circuit to wake up the battery management chip. Based on the existing interactive interface between the main control board and the battery management board, the battery wake-up circuit reuses the charging interface or the communication interface to connect to the main control board, and accesses the wake-up voltage or wake-up pulse of the wake-up circuit on the main control board to achieve reliable wake-up. This eliminates the need to increase the number of interfaces between the two boards, thereby saving space and enabling the battery management board to be reliably awakened in a fully dormant state.

Description

Technical Field

[0001] The present application relates to the field of battery management technology, and in particular to an electrical device. Background Art

[0002] A battery management system (BMS), also known as a battery protection device, serves as a bridge between batteries and electrical devices. It monitors the actual battery status online and provides protection against overcharge, over-discharge, and overtemperature, ensuring safe battery use and the safety of electrical equipment. To reduce the overall power consumption of the battery management system, when an electrical device is in standby mode, the control unit in the BMS is typically required to shut down all unused components, and the BMS control unit must also enter standby mode.

[0003] However, in some current electrical devices, the main control board and the BMS board are two independent boards. The main functions and external interfaces of the electrical device are controlled by the main control board, and the BMS board only provides power to the main control board. To ensure that the BMS board can be reliably awakened after entering a dormant state due to standby, the current practice is to add a wake-up interface between the main control board and the BMS board. However, this method results in space waste when the product structure is limited. Summary of the Invention

[0004] Based on this, the present invention aims to provide an electrical device to solve the above problems, which can realize reliable wake-up of the main control board and the BMS board in the sleep state without changing the interface between the main control board and the BMS board of the existing electrical device.

[0005] An electrical device, wherein a main control board of the electrical device includes a main control chip and a wake-up circuit, and a battery management board of the electrical device includes a battery management chip and a battery wake-up circuit; the wake-up circuit is connected to the main control chip, and the battery wake-up circuit is connected to the battery management chip;

[0006] The battery wake-up circuit is connected to the first charging interface of the main control board through the second charging interface of the battery management board, the wake-up circuit is connected to the first charging interface, and the wake-up circuit outputs a wake-up voltage to wake up the main control chip and the battery management chip; or

[0007] The battery wake-up circuit is connected to the first communication interface of the main control board through the second communication interface of the battery management board, and the first communication interface is connected to the main control chip. The wake-up circuit outputs a wake-up voltage to wake up the main control chip, and the main chip outputs a wake-up pulse to turn on the battery wake-up circuit to wake up the battery management chip.

[0008] In one embodiment, the battery wake-up circuit is connected to the first charging interface through the second charging interface, the main control board also includes a trigger element, and the battery management board also includes an energy storage element. The wake-up circuit includes a charging wake-up circuit and a trigger wake-up circuit. The charging wake-up circuit is connected to the main control chip and the external charging interface of the main control board, the external charging interface is connected to the first charging interface, the energy storage element is connected to the second power supply interface of the battery management board and the battery management chip, the second power supply interface is connected to the first power supply interface of the main control board, the first power supply interface is connected to the trigger element through the trigger wake-up circuit, and the trigger wake-up circuit is connected to the main control chip; the trigger wake-up circuit is also connected to the first charging interface.

[0009] In one embodiment, the trigger wake-up circuit includes a trigger access circuit, a first switch element, a main control access unit and a battery management access unit, the trigger access circuit is connected to the first power supply interface, the trigger element and the control end of the first switch element, the first end of the first switch element is connected to the first power supply interface, the second end of the first switch element is connected to the main control access unit and the battery management access unit, the main control access unit is connected to the main control chip, and the battery management access unit is connected to the first charging interface.

[0010] In one embodiment, the battery wake-up circuit is connected to the first communication interface through the second communication interface, the main control board also includes a trigger element, and the battery management board also includes an energy storage element. The wake-up circuit includes a charging wake-up circuit and a trigger wake-up circuit. The charging wake-up circuit is connected to the main control chip and the external charging interface of the main control board, the external charging interface is connected to the first charging interface, the energy storage element is connected to the second power supply interface of the battery management board and the battery management chip, the second power supply interface is connected to the first power supply interface of the main control board, the first power supply interface is connected to the trigger element through the trigger wake-up circuit, and the trigger wake-up circuit is connected to the main control chip.

[0011] In one embodiment, the trigger wake-up circuit includes a trigger access circuit, a first switch element and a main control access unit, the trigger access circuit is connected to the first power supply interface, the trigger element and the control end of the first switch element, the first end of the first switch element is connected to the first power supply interface, the second end of the first switch element is connected to the main control access unit, and the main control access unit is connected to the main control chip.

[0012] In one embodiment, the trigger access circuit includes a first resistor and a first diode, one end of the first resistor is connected to the first power supply interface, the other end of the first resistor is connected to the anode of the first diode and the control end of the first switching element, and the cathode of the first diode is grounded through the trigger element.

[0013] In one embodiment, the trigger wake-up circuit also includes a self-locking circuit, which is connected to the main control chip and the control end of the first switching element; when the main control chip is awakened based on the connected wake-up voltage, it sends a self-locking signal to the self-locking circuit to maintain the first switching element in the on state.

[0014] In one embodiment, the trigger element is a button, and the number of the buttons is more than two. The trigger wake-up circuit also includes a button type identification circuit, which is connected to the main control chip and is also connected to each of the buttons. When any button is triggered, the button type identification circuit outputs a button type signal to the main control chip. After the main control chip is awakened based on the connected wake-up voltage, it determines whether to send the self-locking signal to the self-locking circuit according to the button type signal.

[0015] In one embodiment, the battery wake-up circuit includes a voltage access unit and a wake-up unit, the voltage access unit is connected to the second charging interface or the second communication interface, and the wake-up unit is connected to the voltage access unit and the battery management chip.

[0016] In one embodiment, the voltage access unit includes a third switching element, a fifth resistor, a sixth resistor and a seventh resistor, the control end of the third switching element is connected to the second charging interface or the second communication interface through the fifth resistor, the control end of the third switching element is also grounded through the sixth resistor, the first end of the third switching element is connected to the wake-up unit, the first end of the third switching element is also connected to the power supply terminal through the seventh resistor, and the second end of the third switching element is grounded.

[0017] In the above-mentioned electrical equipment, based on the existing interactive interface between the main control board and the battery management board, the battery wake-up circuit can reuse the charging interface or communication interface of the battery management board to connect to the main control board, and access the wake-up voltage or wake-up pulse of the wake-up circuit on the main control board to achieve reliable wake-up. There is no need to increase the number of interfaces between the two boards, thereby achieving the purpose of saving space, and also enabling the battery management board to be reliably awakened in a completely dormant state. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a system block diagram of an electrical device in one embodiment;

[0019] Figure 2 is a system block diagram of an electrical device in another embodiment;

[0020] Figure 3 Schematic diagram of a circuit of a main control board in one embodiment;

[0021] Figure 4 is a circuit diagram of a main control board in another embodiment;

[0022] Figure 5 is a connection diagram of a trigger element in one embodiment;

[0023] Figure 6 1 is a circuit diagram of a battery management board in one embodiment;

[0024] Figure 7 FIG. 4 is a circuit diagram of a battery management board in another embodiment. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application.

[0027] It will be understood that the terms "first," "second," etc., used herein may be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish a first element from another element. For example, a first resistor may be referred to as a second resistor, and similarly, a second resistor may be referred to as a first resistor without departing from the scope of this application. The first resistor and the second resistor are both resistors, but they are not the same resistor.

[0028] It can be understood that the “connection” in the following embodiments should be understood as “electrical connection”, “communication connection”, etc. if there is transmission of electrical signals or data between the connected circuits, modules, units, etc.

[0029] When used herein, the singular forms "a", "an", and "the" may also include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" and the like specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

[0030] As described in the background technology, the battery management system (BMS) is a bridge between the battery and the electrical equipment. It can monitor the actual use status of the battery online, provide the battery with protection functions such as overcharge, over-discharge, and over-temperature, ensure the safe use of the battery, and simultaneously ensure the safety of the electrical equipment. In order to reduce the overall power consumption of the battery management system, when the electrical equipment is in standby mode, the control unit in the BMS is generally required to shut down all devices that are not used in the standby mode, and the control unit of the BMS also needs to enter standby mode. However, in some current electrical equipment, the main control board and the BMS board are two independent boards. The main functions and external interfaces of the electrical equipment are all controlled by the main control board, and the BMS board only supplies power to the main control board. In order to ensure that the BMS board can be reliably awakened after entering the dormant state due to standby, the existing practice is generally to add a wake-up interface between the main control board and the BMS board, but this method causes space waste when the product structure space is limited.

[0031] Based on this, an electrical device is provided. On the basis of the existing interactive interface between the main control board and the battery management board, the battery wake-up circuit can reuse the charging interface or communication interface of the battery management board to connect to the main control board, and access the wake-up voltage or wake-up pulse of the wake-up circuit on the main control board to achieve reliable wake-up. There is no need to increase the number of interfaces between the two boards, thereby achieving the purpose of saving space, and also enabling the battery management board to be reliably awakened in a completely dormant state.

[0032] It is understood that the electrical equipment provided in the embodiments of the present application can be a vacuum cleaner, an electric tool, a garden tool, an electric car, etc. The following explanation is given by taking the vacuum cleaner as an example. Figure 1 and Figure 2As shown, the electrical equipment provided in this application includes a main control board 100 and a battery management board 200. The main control board 100 includes a first charging interface C1+, a first power supply interface P1+, and a first communication interface COM1. The battery management board 200 includes a second charging interface C2+, a second power supply interface P2+, and a second communication interface COM2. Among them, the first charging interface C1+ is connected to the second charging interface C2+, the first power supply interface P1+ is connected to the second power supply interface P2+, and the first communication interface COM1 is connected to the first communication interface COM1. The main control board 100 also includes an external charging interface C3+ connected to the first charging interface C1+. The external charger is connected to the main control board 100 through the external charging interface C3+, and then connected to the battery management board 200 through the first charging interface C1+, forming a charging circuit for the external charger to the energy storage element in the battery management board 200; the energy storage element in the battery management board 200 is connected to the first power supply interface P1+ of the main control board 100 through the second power supply interface P2+, forming a power supply circuit for the energy storage element to the main control board 100; the communication interface between the main control board 100 and the battery management board 200 can be used for data communication, such as command issuance or working status data feedback. Among them, the communication connection between the main control board 100 and the battery management board 200 can be a chip directly connected to the communication interface, or a chip connected to the communication interface after passing through the communication circuit to realize data communication. For example, in an embodiment of the present application, Figure 3-Figure 7 As shown, the main control chip 110 is connected to the first communication interface COM1 through the first communication circuit 150, and the battery management chip 210 is connected to the second communication interface COM2 through the second communication circuit 240 to achieve data communication between the boards.

[0033] In one embodiment, Figure 1 and Figure 2 As shown, the main control board 100 of the electrical device includes a main control chip 110 and a wake-up circuit 120, and the battery management board 200 of the electrical device includes a battery management chip 210 and a battery wake-up circuit 220; the wake-up circuit 120 is connected to the main control chip 110, and the battery wake-up circuit 220 is connected to the battery management chip 210; the battery wake-up circuit 220 is connected to the first charging interface C1+ of the main control board 100 through the second charging interface C2+ of the battery management board 200, the wake-up circuit 120 is connected to the first charging interface C1+, and the wake-up circuit 120 outputs a wake-up voltage to wake up the main control chip 110 and the battery management chip 210; or the battery wake-up circuit 220 is connected to the first communication interface COM1 of the main control board 100 through the second communication interface COM2 of the battery management board 200, the first communication interface COM1 is connected to the main control chip 110, the wake-up circuit 120 outputs a wake-up voltage to wake up the main chip 110, and the main chip 110 outputs a wake-up pulse to turn on the battery wake-up circuit 220 to wake up the battery management chip 210.

[0034] The main control chip 110 is designed on the main control board 100 and is used to control the overall functions of the electrical device. Taking a vacuum cleaner as an example, the main control chip 110 can be used to control the vacuum cleaner's operating status, operating gear, and the responses of triggering and indicating components. The main control chip 110 can be implemented using an MCU (Micro Control Unit). The battery management chip 210 is designed on the battery management board 200 and is used to monitor and protect the charging and discharging processes of the energy storage element on the battery management board 200, namely the battery.

[0035] Specifically, the wake-up circuit 120 on the main control board 100 is used to output a wake-up voltage to the main control chip 110 when the electrical device needs to be awakened, so as to wake up the main control chip 110. Then, the battery wake-up circuit 220 on the battery management board 200 outputs a wake-up voltage or a wake-up pulse according to the interface connected to the battery wake-up circuit 220 to wake up the battery management chip 210. Figure 1 As shown, the battery wake-up circuit 220 can be connected to the first charging interface C1+ through the second charging interface C2+. At this time, the wake-up circuit 120 is connected to the first charging interface C1+ and outputs a wake-up voltage to wake up the main control chip 110 and the battery management chip 210. Figure 2 As shown, the battery awakening circuit 220 can also be connected to the first communication interface COM1 through the second communication interface COM2. Because the first communication interface COM1 is originally connected to the main control chip 110, after the main control chip 110 is awakened, it can output a wake-up pulse to turn on the battery awakening circuit 220 to wake up the battery management chip 210.

[0036] When the main control chip 110 and the battery management chip 210 are in standby mode, the wake-up situation may be when an external charger is connected for charging, requiring the battery management chip 210 to monitor and protect the battery. Alternatively, the wake-up situation may be when a trigger element is triggered by the user, requiring the corresponding operation to be performed. Correspondingly, when the wake-up is performed by connecting an external charger, the wake-up voltage output by the wake-up circuit 120 may be the charging voltage input by the external charger; when the wake-up is performed by triggering the trigger element, the wake-up voltage output by the wake-up circuit 120 may be the battery voltage of the energy storage element of the battery management board 200.

[0037] In the above-mentioned electrical equipment, based on the existing interactive interface between the main control board and the battery management board, the battery wake-up circuit can reuse the charging interface or communication interface of the battery management board to connect to the main control board, and access the wake-up voltage or wake-up pulse of the wake-up circuit on the main control board to achieve reliable wake-up. There is no need to increase the number of interfaces between the two boards, thereby achieving the purpose of saving space, and also enabling the battery management board to be reliably awakened in a completely dormant state.

[0038] In one embodiment, Figure 1 As shown, the battery wake-up circuit 220 is connected to the first charging interface C1+ through the second charging interface C2+, the main control board 100 also includes a trigger element 130, and the battery management board 200 also includes an energy storage element 230. The wake-up circuit 120 includes a charging wake-up circuit 121 and a trigger wake-up circuit 122. The charging wake-up circuit 121 is connected to the main control chip 110 and the external charging interface C3+ of the main control board 100. The external charging interface C3+ is connected to the first charging interface C1+. The energy storage element 230 is connected to the second power supply interface P2+ of the battery management board 200 and the battery management chip 210. The second power supply interface P2+ is connected to the first power supply interface P1+ of the main control board 100. The first power supply interface P1+ is connected to the trigger element through the trigger wake-up circuit 122. The trigger wake-up circuit 122 is connected to the main control chip 110, and the trigger wake-up circuit 122 is also connected to the first charging interface C1+.

[0039] It can be understood that when the battery wake-up circuit 220 is connected to the second charging interface C2+ and then connected to the first charging interface C1+ of the main control board 100, the battery wake-up circuit 220 wakes up the battery management chip 210 by receiving the wake-up voltage sent by the main control board 100.

[0040] Specifically, when an external charger is used to wake up the battery by connecting it to the charging wake-up circuit 121 through the external charging interface C3+, the charging wake-up circuit 121 outputs a wake-up voltage to the main control chip 110 for power supply according to the charging voltage, thereby waking up the main control chip 110. At the same time, the charging voltage is also input to the battery wake-up circuit 220 through the first charging interface C1+. After the battery wake-up circuit 220 is turned on, it wakes up the battery management chip 210.

[0041] Furthermore, when the trigger element is triggered and the trigger wake-up circuit 122 is connected to the first power supply interface P1+ and the energy storage element 230 for wake-up, the trigger wake-up circuit 122 outputs a wake-up voltage based on the battery voltage of the energy storage element to the main control chip 110 for power supply, thereby waking up the main control chip 110. At the same time, the battery voltage is also input to the battery wake-up circuit 220 through the first charging interface C1+. After the battery wake-up circuit 220 is turned on, it wakes up the battery management chip 210. The energy storage element 230 can be a battery, a capacitor, or other device. In this embodiment, the energy storage element 230 is a battery.

[0042] In one embodiment, Figure 3As shown, the charging wake-up circuit 121 includes a diode D1, the anode of the diode D1 is connected to the external charging interface C3+, and the cathode of the diode D1 is connected to the main control chip 110. It can be understood that the diode D1 can prevent current backflow between the charging wake-up circuit 121 and the trigger wake-up circuit 122, thereby playing a blocking role.

[0043] In one embodiment, Figure 3 As shown, the trigger wake-up circuit 122 includes a trigger access circuit 1221, a first switch element, a main control access unit 1222 and a battery management access unit 1223. The trigger access circuit 1221 is connected to the first power supply interface P1+, the trigger element 130 and the control end of the first switch element. The first end of the first switch element is connected to the first power supply interface P1+, the second end of the first switch element is connected to the main control access unit 1222 and the battery management access unit 1223, the main control access unit 1222 is connected to the main control chip 110, and the battery management access unit 1223 is connected to the first charging interface C1+.

[0044] Specifically, the trigger access circuit 1221 is used to connect the trigger element and switch the first switch element to the on state when the trigger element is triggered. Then the first switch element transmits the battery voltage of the energy storage element 230 connected to the first power supply interface P1+ to the main control access unit 1222. The main control access unit 1222 outputs the wake-up voltage to the main control chip 110 according to the battery voltage for power supply, thereby realizing the wake-up of the main control chip 110. At the same time, the battery voltage is also connected to the first charging interface C1+ through the battery management access unit 1223 and input to the battery wake-up circuit 220. After the battery wake-up circuit 220 is turned on, the battery management chip 210 is awakened.

[0045] In one embodiment, Figure 2 As shown, the battery wake-up circuit 220 is connected to the first communication interface COM1 through the second communication interface COM2, the main control board 100 also includes a trigger element 130, and the battery management board 200 also includes an energy storage element 230. The wake-up circuit 120 includes a charging wake-up circuit 121 and a trigger wake-up circuit 122. The charging wake-up circuit 121 is connected to the main control chip 110 and the external charging interface C3+ of the main control board 100. The external charging interface C3+ is connected to the first charging interface C1+. The energy storage element 230 is connected to the second power supply interface P2+ of the battery management board 200 and the battery management chip 210. The second power supply interface P2+ is connected to the first power supply interface P1+ of the main control board 100. The first power supply interface P1+ is connected to the trigger element through the trigger wake-up circuit 122, and the trigger wake-up circuit 122 is connected to the main control chip 110.

[0046] It is understood that when the battery wake-up circuit 220 is connected to the second communication interface COM2 and then to the first communication interface COM1 of the main control board 100, the battery wake-up circuit 220 wakes up the battery management chip 210 by receiving the wake-up pulse sent by the main control board 100. The method of waking up the main control chip 110 in this manner is consistent with the principle of the above embodiment and will not be repeated here.

[0047] Specifically, when an external charger is used to wake up the battery by connecting it to the charging wake-up circuit 121 through the external charging interface C3+, the charging wake-up circuit 121 outputs a wake-up voltage according to the charging voltage to wake up the main control chip 110. The wake-up pulse emitted by the main control chip 110 passes through the first communication interface COM1 and the second communication interface COM2 in turn to turn on the battery wake-up circuit 220. After the battery wake-up circuit 220 is turned on, it wakes up the battery management chip 210.

[0048] Furthermore, when the trigger element is triggered, and then the trigger wake-up circuit 122 is connected to the first power supply interface P1 + connected to the energy storage element 230 for awakening, the trigger wake-up circuit 122 outputs a wake-up voltage according to the battery voltage of the energy storage element 230 to wake up the main control chip 110. The wake-up pulse emitted by the main control chip 110 passes through the first communication interface COM1 and the second communication interface COM2 in turn to turn on the battery wake-up circuit 220. After the battery wake-up circuit 220 is turned on, it wakes up the battery management chip 210.

[0049] In one embodiment, Figure 4 As shown, the trigger wake-up circuit 122 includes a trigger access circuit 1221, a first switch element and a main control access unit 1222. The trigger access circuit 1221 is connected to the first power supply interface P1+, the trigger element 130 and the control end of the first switch element. The first end of the first switch element is connected to the first power supply interface P1+, the second end of the first switch element is connected to the main control access unit 1222, and the main control access unit 1222 is connected to the main control chip 110.

[0050] Specifically, this embodiment corresponds to a trigger wake-up circuit 122 that does not need to be connected to the first power supply interface C1+. The trigger wake-up circuit 122 in this embodiment is only used to wake up the main control chip 110. Then, after the main control chip 110 wakes up, the wake-up pulse sent passes through the first communication interface COM1 and the second communication interface COM2 in turn to turn on the battery wake-up circuit 220. After the battery wake-up circuit 220 is turned on, it wakes up the battery management chip 210.

[0051] In one embodiment, Figure 3 or Figure 4As shown, the trigger access circuit 1221 includes a first resistor and a first diode, one end of the first resistor is connected to the first power supply interface P1+, the other end of the first resistor is connected to the anode of the first diode and the control end of the first switch element, and the cathode of the first diode is grounded through the trigger element. Among them, the first resistor is resistor R1, and the first diode is diode D3. One end of the resistor R1 is connected to the first power supply interface P1+, and the other end is connected to the anode of the diode D3. The cathode of the diode D3 is grounded through the trigger element, and the anode of the diode D3 is also connected to the control end of the first switch element. Specifically, when the trigger element is triggered, the first power supply interface P1+ is connected to the ground through the resistor R1, the diode D3 and the trigger element in sequence to form a loop, the anode of the diode D3 becomes a low level, and the first switch element is turned on.

[0052] The first switching element is a P-channel MOS transistor M1, the first end of the first switching element is the source of the MOS transistor M1, the second end of the first switching element is the drain of the MOS transistor M1, and the control end of the first switching element is the gate of the MOS transistor M1. The main control access unit 1222 is used to transmit the battery voltage input from the first power supply interface P1+ to the main control chip 110 to wake it up after the MOS transistor M1 is turned on by the trigger element. The main control access unit 1222 includes a diode D2. The battery management access unit 1223 is used to transmit the battery voltage input from the first power supply interface P1+ to the battery management chip 210 to wake it up after the MOS transistor M1 is turned on by the trigger element. The battery management access unit 1223 includes a resistor R7 and a diode D8.

[0053] Specifically, the gate of MOS transistor M1 is connected to the anode of diode D3, the source of MOS transistor M1 is connected to the first power supply interface P1+, the drain of MOS transistor M1 is connected to the anode of diode D2, and the drain of MOS transistor M1 is also connected to the anode of diode D8 via resistor R7. The cathode of diode D2 is connected to the main control chip 110 via the power management unit, and the cathode of diode D8 is connected to the battery wake-up circuit 220 of the battery management board 200 via the first charging interface C1+. When the trigger element is activated, the anode of diode D3 goes low, turning on MOS transistor M1. The battery voltage is processed by diode D2 and the power management unit and then transmitted to the main control chip 110 to wake it up. The battery voltage is also transmitted to the battery management chip 210 through resistor R7, diode D8, and battery wake-up circuit 220 to wake it up.

[0054] In one embodiment, Figure 3 or Figure 4As shown, the main control board 100 also includes a power management unit 140, which is connected between the charging wake-up circuit 121 and the main control chip 110, and also between the trigger wake-up circuit 122 and the main control chip 110. The power management unit 140 is used to step down and stabilize the charging voltage or battery voltage before inputting it to the main control chip 110, adjusting the battery voltage or charging voltage to match the operating voltage of the main control chip 110 before supplying power to the main control chip 110. In addition, the power management unit also outputs the operating voltage through the internal power supply terminal VCC to power other components in the main control board 100, ensuring normal operation of the board.

[0055] It is understood that the trigger element can be a device such as an inductive switch, a push button switch, or a touch switch. Furthermore, the trigger element can be a device that does not reset after being triggered, or a device that automatically resets after being triggered. Accordingly, when the trigger element is a device that automatically resets after being triggered, the main control board 100 can also output a self-locking signal through the main control chip 110 to maintain the first switch element in the on state to ensure reliable wake-up.

[0056] In one embodiment, Figure 3 or Figure 4 As shown, the trigger wake-up circuit 122 also includes a self-locking circuit 1224, which is connected to the main control chip 110 and the control end of the first switch element; when the main control chip 110 is awakened based on the connected battery voltage, it sends a self-locking signal to the self-locking circuit 133 to maintain the first switch element in the on state.

[0057] In one embodiment, Figure 3 or Figure 4 As shown, the self-locking circuit 1224 includes a second switching element, a second resistor, a third resistor and a fourth resistor. The first end of the second switching element is connected to the control end of the first switching element through the second resistor, the control end of the second switching element is connected to the main control chip 110 through the third resistor, the control end of the second switching element is also grounded through the fourth resistor, and the second end of the second switching element is grounded.

[0058] The second switch element is an N-channel MOS transistor M2, a first end of the second switch element is the drain of the MOS transistor M2, a second end of the second switch element is the source of the MOS transistor M2, and a control end of the second switch element is the gate of the MOS transistor M2. The second resistor is resistor R2, the third resistor is resistor R3, and the fourth resistor is resistor R4.

[0059] Specifically, the drain of MOS transistor M2 is connected to the gate of MOS transistor M1 via resistor R2. The gate of MOS transistor M2 is connected to an IO pin of main control chip 110 via resistor R3. The gate of MOS transistor M2 is also grounded via resistor R4. The source of MOS transistor M2 is also grounded. When main control chip 110 is awakened, it can output a self-locking signal "Lock" to the gate of MOS transistor M2 via its IO pin, turning on MOS transistor M2. This maintains the gate of MOS transistor M1 in a low-level, on-state, achieving self-locking upon awakening.

[0060] In one embodiment, Figure 3-5 As shown, the trigger element is a button, and the number of buttons is more than two. The trigger wake-up circuit 122 also includes a button type identification circuit 1225. The button type identification circuit 1225 is connected to the main control chip 110, and the button type identification circuit 1225 is also grounded through each button; when any button is triggered, the button type identification circuit 1225 outputs a button type signal to the main control chip 110. After the main control chip 110 wakes up based on the connected battery voltage, it determines whether to send a self-locking signal to the self-locking circuit 1224 according to the button type signal.

[0061] Specifically, the key type identification circuit 1225 can output a key type signal to the main control chip 110 when any key is pressed, so that the main control chip 110 can determine the type of the pressed key based on the key type signal. The specific circuit structure of the key type identification circuit 1225 is not unique. It can be that each key outputs a key type signal Key_AD to the main control chip 110, or it can be that the keys are connected in parallel and then output a key type signal Key_AD to the main control chip 110. When each key outputs a key type signal Key_AD to the main control chip 110, the main control chip 110 receives each key type signal Key_AD through multiple pins, and then determines the type of the pressed key based on the pin that receives the signal. When the keys are connected in parallel and then output a key type signal to the main control chip 110, the main control chip 110 receives the key type signal Key_AD through one pin, and can determine the type of the pressed key based on the amplitude of the received key signal type.

[0062] Furthermore, when the main control chip 110 identifies the type of button pressed, it can determine whether to send a self-locking signal to the self-locking circuit 1224 based on the button type and the preset type. For example, if the button types include a power button, a vacuum switch button, or a vacuum gear adjustment button, the self-locking signal can be sent to the self-locking circuit 1224 only when the power button is pressed, thereby keeping the main control chip 110 and the battery management chip 210 awake. If other types of buttons are pressed, no self-locking signal is sent to prevent accidental touches.

[0063] like Figure 3 or Figure 4 As shown, the key type identification circuit 1225 includes a diode D4, a resistor R5, a resistor R6 and a capacitor C1. One end of the resistor R5 is connected to the internal power supply terminal VCC, and the other end of the resistor R5 is connected to the main control chip 110 through the resistor R6. The end of the resistor R6 connected to the main control chip 110 is also grounded through the capacitor C1. The other end of the resistor R5 is connected to the anode of the diode D4, and the cathode of the diode D4 is grounded through each key. Figure 3 As shown, each button grounding circuit is further connected in series with two resistors of different resistance values. It is understood that when different buttons are pressed, the voltage output from the internal power supply terminal VCC is divided by resistors R5 and R6, as well as the resistors connected in series with the button grounding circuits, and then outputs voltages of different amplitudes to the main control chip 110, allowing the main control chip 110 to identify the corresponding button type.

[0064] In one embodiment, Figure 6 and Figure 7 As shown, the battery awakening circuit 220 includes a voltage access unit 221 and a awakening unit 222 . The voltage access unit 221 is connected to the second charging interface C2+ or the second communication interface COM2 . The awakening unit 222 is connected to the voltage access unit 221 and the battery management chip 210 .

[0065] Specifically, when the voltage access unit 221 is connected to the second charging port C2+, the voltage access unit 221 is configured to output a wake-up signal to the wake-up unit based on the wake-up voltage input by the main control board 100, so that the wake-up unit controls the battery management chip 210 to wake up. When the voltage access unit 221 is connected to the second communication port COM2, the voltage access unit 221 is configured to output a wake-up signal to the wake-up unit based on the wake-up pulse input by the main control board 100, so that the wake-up unit controls the battery management chip 210 to wake up. Upon receiving the wake-up signal, the wake-up unit can generate a timing signal and input it to the I / O port of the battery management chip 210, so that the I / O port of the battery management chip 210 is awakened when the level of the rising or falling edge changes.

[0066] In one embodiment, Figure 6 or Figure 7 As shown, the voltage access unit 221 includes a third switching element, a fifth resistor, a sixth resistor and a seventh resistor. The control end of the third switching element is connected to the second charging interface C2+ or the second communication interface COM2 through the fifth resistor, and the control end of the third switching element is also grounded through the sixth resistor. The first end of the third switching element is connected to the wake-up unit 222, and the first end of the third switching element is also connected to the power supply terminal through the seventh resistor. The second end of the third switching element is grounded.

[0067] The third switch element is an N-channel MOS transistor M3, the control terminal of the third switch element is the gate of the MOS transistor M3, the first terminal of the third switch element is the drain of the MOS transistor M3, and the second terminal of the third switch element is the source of the MOS transistor M3. The fifth resistor is resistor R9, the sixth resistor is resistor R10, and the seventh resistor is resistor R11.

[0068] Specifically, the gate of the MOS transistor M3 is connected to the second charging port C2+ or the second communication port COM2 via a resistor R9. The gate of the MOS transistor M3 is also grounded via a resistor R10. The drain of the MOS transistor M3 is connected to the wake-up unit 222. The drain of the MOS transistor M3 is also connected to the power supply terminal via a resistor R11. The source of the MOS transistor M3 is grounded. When the MOS transistor M3 receives a wake-up voltage or a wake-up pulse from the main control board, the MOS transistor M3 is turned on, and the wake-up signal CHGD is pulled low, thereby causing the wake-up unit to generate a timing signal that is input to the I / O port of the battery management chip 210, causing the I / O port of the battery management chip 210 to be awakened when the level of the rising edge or falling edge changes.

[0069] In one embodiment, Figure 6 or Figure 7 As shown, the battery management chip 210 of the battery management board 200 includes a front-end monitoring chip 211 and a back-end control chip 212. When waking up the battery management chip 210, the timing signal generated by the wake-up unit is input into the front-end monitoring chip 211. After waking up, the front-end monitoring chip 211 can directly obtain the battery voltage, process it, and then provide the VCC voltage to the back-end control chip 212, allowing the back-end control chip 212 to resume normal operation. The front-end monitoring chip 211 is used to monitor the battery status parameters in real time and provide feedback to the back-end control chip 212. The back-end control chip 212 is used for overall control of the battery management board 200. The back-end control chip 212 can be implemented using an MCU.

[0070] In order to avoid false triggering during charging, Figure 6 and Figure 7As shown, in one embodiment, the battery management board 200 further includes a charging circuit 250 connected between the battery and the second charging port C2+. The charging circuit 250 is also connected to the back-end control chip 212. The charging circuit 250 includes a switch module, which is controlled by the microcontroller back-end control chip 212 to switch on and off, thereby controlling whether the charging voltage connected to the second charging port C2+ can charge the battery. It can be understood that when the switch module of the charging circuit 250 is on, the charging voltage connected to the second charging port C2+ charges the battery; when the switch module of the charging circuit 250 is off, the charging voltage connected to the second charging port C2+ stops charging the battery. When the battery management board 200 is in standby mode and needs to be recharged, the charging circuit can, after the front-end monitoring chip 211 is awakened, supply a stable charging voltage to the battery through the second charging port C2+. The front-end monitoring chip 211 can then directly obtain the stable battery voltage, process it, and provide the VCC voltage to the back-end control chip 212, allowing the back-end control chip 212 to reliably wake up and resume normal operation. It effectively suppresses false triggering and wake-up, has very high stability and reliability, and can prevent external interference, thereby avoiding the risk of reduced battery pack life and even leakage and fire.

[0071] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0072] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art could make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. An electrical device, characterized in that: The main control board of the electrical equipment includes a main control chip and a wake-up circuit, and the battery management board of the electrical equipment includes a battery management chip and a battery wake-up circuit; the wake-up circuit is connected to the main control chip, and the battery wake-up circuit is connected to the battery management chip; the main control board also includes a trigger element, and the battery management board also includes an energy storage element. The wake-up circuit includes a charging wake-up circuit and a trigger wake-up circuit. The charging wake-up circuit is connected to the main control chip and the external charging interface of the main control board, the external charging interface is connected to the first charging interface, the energy storage element is connected to the second power supply interface of the battery management board and the battery management chip, the second power supply interface is connected to the first power supply interface of the main control board, the first power supply interface is connected to the trigger element through the trigger wake-up circuit, and the trigger wake-up circuit is connected to the main control chip; The battery wake-up circuit is connected to the first charging interface of the main control board through the second charging interface of the battery management board, the trigger wake-up circuit is connected to the first charging interface, and the wake-up circuit outputs a wake-up voltage to wake up the main control chip and the battery management chip; or The battery wake-up circuit is connected to the first communication interface of the main control board through the second communication interface of the battery management board, and the first communication interface is connected to the main control chip. The wake-up circuit outputs a wake-up voltage to wake up the main control chip, and the main chip outputs a wake-up pulse to turn on the battery wake-up circuit to wake up the battery management chip.

2. The electrical equipment according to claim 1, characterized in that: The trigger wake-up circuit includes a trigger access circuit, a first switch element, a main control access unit and a battery management access unit. The trigger access circuit is connected to the first power supply interface, the trigger element and the control end of the first switch element. The first end of the first switch element is connected to the first power supply interface. The second end of the first switch element is connected to the main control access unit and the battery management access unit. The main control access unit is connected to the main control chip, and the battery management access unit is connected to the first charging interface.

3. The electrical equipment according to claim 1, characterized in that: The trigger wake-up circuit includes a trigger access circuit, a first switching element and a main control access unit. The trigger access circuit is connected to the first power supply interface, the trigger element and the control end of the first switching element. The first end of the first switching element is connected to the first power supply interface, the second end of the first switching element is connected to the main control access unit, and the main control access unit is connected to the main control chip.

4. The electrical equipment according to claim 2 or 3, characterized in that: The trigger access circuit includes a first resistor and a first diode, one end of the first resistor is connected to the first power supply interface, the other end of the first resistor is connected to the anode of the first diode and the control end of the first switching element, and the cathode of the first diode is grounded through the trigger element.

5. The electrical equipment according to claim 2 or 3, characterized in that: The trigger wake-up circuit also includes a self-locking circuit, which is connected to the main control chip and the control end of the first switching element; when the main control chip is awakened based on the connected wake-up voltage, it sends a self-locking signal to the self-locking circuit to maintain the first switching element in the on state.

6. The electrical equipment according to claim 5, characterized in that: The trigger element is a button, and the number of the buttons is more than two. The trigger wake-up circuit also includes a button type identification circuit, which is connected to the main control chip and is also connected to each of the buttons. When any button is triggered, the button type identification circuit outputs a button type signal to the main control chip. After the main control chip is awakened based on the connected wake-up voltage, it determines whether to send the self-locking signal to the self-locking circuit according to the button type signal.

7. The electrical equipment according to claim 1, characterized in that: The battery awakening circuit includes a voltage access unit and a awakening unit, the voltage access unit is connected to the second charging interface or the second communication interface, and the awakening unit is connected to the voltage access unit and the battery management chip.

8. The electrical equipment according to claim 7, characterized in that: The voltage access unit includes a third switching element, a fifth resistor, a sixth resistor and a seventh resistor. The control end of the third switching element is connected to the second charging interface or the second communication interface through the fifth resistor. The control end of the third switching element is also grounded through the sixth resistor. The first end of the third switching element is connected to the wake-up unit. The first end of the third switching element is also connected to the power supply terminal through the seventh resistor. The second end of the third switching element is grounded.

9. The electrical equipment according to claim 7, characterized in that: The battery management chip includes a front-end monitoring chip and a back-end control chip, and the front-end monitoring chip is connected to the wake-up unit and the back-end control chip.

10. The electrical equipment according to claim 9, characterized in that: The battery management board also includes a charging circuit connected between the battery and the second charging interface, and the charging circuit is connected to the back-end control chip; The charging circuit includes a switch module, which is controlled by the back-end control chip to be turned on and off to control whether the charging voltage connected to the second charging interface charges the battery.

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