Driving circuit and electric equipment

Abstract

The utility model discloses a driving circuit and electric equipment, belongs to the technical field of batteries, is used for connecting a battery module and driving a control module, and comprises a first driving unit and a second driving unit, the first driving unit comprises a first switch module and a current limiting module, and the first switch module and the current limiting module are connected in series and then are connected between the battery module and the control module; the second driving unit comprises a second switch module, and the second switch module is connected between the battery module and the control module; wherein the current in the first driving unit is smaller than that in the second driving unit. The driving circuit provided by the utility model comprises two paths, the first driving unit can adopt small current to supply power to the control module when the electric equipment is in a standby state, and the second driving unit can adopt large current to supply power to the control module when the electric equipment is in a normal working state. The power consumption of the battery when the electric equipment is in the standby state can be reduced through the arranged first driving unit.

Description

Technical Field

[0001] Embodiments of the present application relate to the technical field of batteries, and particularly to a driving circuit and an electrical device. Background Art

[0002] The lithium battery protection board circuit is a commonly used circuit in intelligent devices (such as mobile phones, laptops, etc.) for protecting and managing lithium batteries. In the traditional lithium battery protection board circuit, when the intelligent device is in the standby mode, the fuel gauge chip still needs to continuously interact with the control main board to monitor information such as the battery power in real time. This causes the fuel gauge chip to keep working and continuously consume the electric energy of the battery, and the battery cannot avoid the fuel gauge and select other paths to supply power to the control main board, resulting in unnecessary power consumption of the battery and waste of electric energy. Summary of the Utility Model

[0003] The purpose of the embodiments of the present application is to provide a driving circuit to solve the technical problem that there is only one path connecting the power supply between the battery module and the control module in the prior art, resulting in high battery power consumption of the electrical device in the standby mode. Another purpose of the embodiments of the present application is to provide an electrical device to solve the technical problem that there is only one path connecting the power supply between the battery module and the control module in the prior art, resulting in high battery power consumption of the electrical device in the standby mode.

[0004] To solve the above technical problems, the embodiments of the present application disclose the following technical solutions:

[0005] In a first aspect, a driving circuit is provided, including:

[0006] A first driving unit, the first driving unit includes a first switch module and a current limiting module, and the first switch module is connected in series with the current limiting module between the battery module and the control module;

[0007] A second driving unit, the second driving unit is connected in parallel with the first driving unit, and the second driving unit includes a second switch module, and the second switch module is connected between the battery module and the control module;

[0008] Wherein, the current output by the first driving unit is less than the current output by the second driving unit.

[0009] In combination with the first aspect, the driving circuit further includes a monitoring module, and the monitoring module is connected to the control module;

[0010] The monitoring module is configured to monitor the current between the battery module and the control module, and in response to the current being less than or equal to a current threshold, send a switching signal, and the switching signal is configured to indicate that the first switch module is turned on and the second switch module is turned off.

[0011] In combination with the first aspect, the monitoring module has a signal output terminal, and the signal output terminal is configured to output the switching signal;

[0012] The first switching module has a first signal terminal, the second switching module has a second signal terminal, and the first signal terminal and the second signal terminal are respectively connected to the signal output terminal.

[0013] In combination with the first aspect, the switching signal includes a first level signal and a second level signal. The monitoring module has a first output terminal and a second output terminal. The first switching module has a first signal terminal, and the second switching module has a second signal terminal. The first output terminal is connected to the first signal terminal, and the second output terminal is connected to the second signal terminal;

[0014] The first output terminal is configured to output the first level signal so that the first switching module conducts in response to the first level signal;

[0015] The second output terminal is configured to output the second level signal so that the second switching module disconnects in response to the second level signal.

[0016] In combination with the first aspect, the monitoring module has a data output terminal, the control module has a data input terminal, and the data output terminal is connected to the data input terminal.

[0017] In combination with the first aspect, the monitoring module has a clock output terminal, the control module has a clock input terminal, and the clock output terminal is connected to the clock input terminal.

[0018] In combination with the first aspect, the monitoring module has a voltage input terminal and a ground terminal. The voltage input terminal is connected to the positive electrode of the battery module, and the ground terminal is connected to the negative electrode of the battery module.

[0019] In combination with the first aspect, the current limiting module includes a plurality of resistors, and the plurality of resistors are connected in series or in parallel with each other.

[0020] In combination with the first aspect, the drive circuit further includes a protection module. The protection module is connected in parallel with the first switching module, and the protection module includes a plurality of capacitors, and the plurality of capacitors are connected in series with each other.

[0021] In the second aspect, there is provided an electrical device, and the electrical device includes:

[0022] A battery module;

[0023] A control module, the control module is connected to the battery module; and

[0024] The driving circuit according to any one of the first aspects, wherein the driving circuit is connected between the battery module and the control module to drive the control module.

[0025] One of the above technical solutions has the following advantages or beneficial effects:

[0026] Compared with the prior art, a driving circuit of the present application for connecting a battery module and driving a control module includes: a first driving unit and a second driving unit; the first driving unit includes a first switching module and a current limiting module, and the first switching module and the current limiting module are connected in series between the battery module and the control module; the second driving unit includes a second switching module, and the second switching module is connected between the battery module and the control module; wherein, the current in the first driving unit is less than the current in the second driving unit. The driving circuit provided by the present application includes two paths. The first driving unit can supply power to the control module with a small current when the electrical device is in the standby state, and the second driving unit can supply power to the control module with a large current when the electrical device is in the normal working state. By setting the first driving unit, the power consumption of the battery of the electrical device in the standby state can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The technical solutions and other beneficial effects of the present application will become obvious by describing the specific embodiments of the present application in detail with reference to the accompanying drawings.

[0028] Figure 1 It is a schematic diagram of module connection of the driving circuit provided by the embodiment of the present application;

[0029] Figure 2 It is a schematic diagram of circuit connection of the driving circuit provided by the embodiment of the present application;

[0030] Figure 3 It is a schematic diagram of circuit connection of the driving circuit provided by some embodiments of the present application;

[0031] Figure 4 It is a schematic diagram of circuit connection of the driving circuit provided by other embodiments of the present application;

[0032] Figure 5 It is a schematic diagram of connection of the electrical device provided by the embodiment of the present application.

[0033] The reference numerals are as follows:

[0034] 100 - battery module, 200 - control module, 300 - first driving unit, 310 - first switching module, 320 - current limiting module, 330 - protection module, 400 - second driving unit, 410 - second switching module, 500 - monitoring module. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0035] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless otherwise specifically defined.

[0036] Related technicians of the present application have noticed that in some embodiments of the present application, when the electrical device is in the standby mode, the fuel gauge chip in the battery still interacts with the main board of the electrical device all the time, resulting in continuous power consumption of the battery. Therefore, in the embodiments of the present application, when the electrical device is in the standby mode, the unnecessary interaction between the fuel gauge chip and the main board of the electrical device is cut off, and the main board of the electrical device is powered through another added path, which can effectively reduce the power consumption of the battery.

[0037] The following describes the specific implementation manners of the present application through embodiments:

[0038] As Figures 1 to 4 shown, the embodiments of the present application provide a driving circuit, a first driving unit 300, the first driving unit 300 includes a first switch module 310 and a current limiting module 320, and the first switch module 310 and the current limiting module 320 are connected in series between the battery module 100 and the control module 200; a second driving unit 400, the second driving unit 400 is connected in parallel with the first driving unit 300, and the second driving unit 400 includes a second switch module 410, and the second switch module 410 is connected between the battery module 100 and the control module 200; wherein, the current output by the first driving unit 300 is less than the current output by the second driving unit 400.

[0039] The specific working process and principle include: The first driving unit 300 and the second driving unit 400 provided in this application are used to connect the battery module 100 and the control module 200 in the electrical device, and provide different power supply methods for the control module 200 in different working states. When the electrical device is in the normal working state, the second switch module 410 is turned on, and the power supply of the battery module 100 directly supplies power to the control module 200. Therefore, the function of the second driving unit 400 is to provide a larger current supply for the control module 200 to meet the power demand in the normal working state. When the electrical device is in the standby state, by turning on the first switch module 310, the power supply of the battery module 100 supplies power to the control module 200 through the current limiting module 320. The function of the first driving unit 300 is to limit the current magnitude through the current limiting module 320 to ensure that the control module 200 is powered with a smaller current in the standby state, thereby saving electrical energy and extending the battery life.

[0040] In the embodiment of this application, the first driving unit 300 is the first connection path connected between the battery module 100 and the control module 200, and the second driving unit 400 is the second connection path connected between the battery module 100 and the control module 200. Therefore, when the electrical device selects the first driving unit 300 and the second driving unit 400 to drive the control module 200 in different working states, different power supply methods can be provided for the control module 200 to provide different currents and powers, thereby achieving the purpose of energy saving and effectively driving the control module 200.

[0041] Such as Figures 1 to 3As shown, in the embodiment of the present application, the drive circuit further includes a monitoring module 500, and the monitoring module 500 is connected to the control module 200; the monitoring module 500 is configured to monitor the current between the battery module 100 and the control module 200, and in response to the current being less than or equal to the current threshold, issue a switching signal, and the switching signal is configured to indicate that one of the first switching module 310 and the second switching module 410 is turned on and the other is turned off. Specifically, the monitoring module 500 includes a fuel gauge chip U2, and the monitoring module 500 is used to monitor the magnitude of the current between the battery module 100 and the control module 200 in real time. When it is monitored that the current is less than or equal to the current threshold, it means that the current between the battery module 100 and the control module 200 has dropped below the set threshold. The monitoring module 500 determines whether the electrical device has entered the standby state by monitoring the magnitude of the current and the current threshold. When the current is greater than the current threshold, it indicates that the electrical device is operating normally at this time; when the current is less than or equal to the current threshold, it indicates that the electrical device has entered the standby state. Generally speaking, the magnitude of the current threshold is 0. When it is monitored that the current is less than or equal to the current threshold, a switching signal will be responded to and issued. The first switching module 310 will respond to the received switching signal, open the first switching module 310 according to the state of the signal and connect the battery module 100 and the control module 200 to drive the control module 200. Thus, the electrical device can be powered by the first drive unit 300 in the standby state, so as to achieve the purpose of energy saving and effectively driving the control module 200.

[0042] At the same time, the monitoring module 500 can also be used to calculate and monitor the power of the battery module 100. Through the fuel gauge chip, the monitoring module can give the power information of the battery to monitor and manage the usage of the battery.

[0043] As Figures 1 to 3 shown, in the embodiment of the present application, the monitoring module 500 has a signal output terminal CO, and the signal output terminal is configured to output a switching signal; the first switching module 310 has a first signal terminal, and the first signal terminal is connected to the signal output terminal; the switching signal includes a first level signal, and the first switching module 310 connects the battery module 100 and the control module 200 in response to the received first level signal.

[0044] Specifically, the monitoring module 500 includes a fuel gauge chip U2, and the fuel gauge chip U2 has a signal output terminal CO; the first switch module 310 includes a first MOS transistor Q1, and the gate of the first MOS transistor Q1 is the first signal terminal; when the monitoring module 500 monitors that the current between the battery module 100 and the control module 200 is less than or equal to the current threshold, it outputs a switching signal through the signal output terminal CO; the first switch module 310 receives the switching signal through the first signal terminal; if the switching signal is a first-level signal, the first switch module 310 will be turned on, and at this time, the battery module 100 is connected to the control module 200, so that the electrical device can be powered by the first driving unit 300 in the standby state, thereby reducing the power consumption of the battery in the standby state.

[0045] As Figures 1 to 3 shown, in the embodiment of the present application, the monitoring module 500 has a signal output terminal CO, and the signal output terminal CO is configured to output a switching signal; the second switch module 410 has a second signal terminal, and the second signal terminal is connected to the signal output terminal; the switching signal includes a first-level signal, and the second switch module 410 disconnects the connection between the battery module 100 and the control module 200 in response to the received switching signal. Specifically, the second switch module 410 includes a second MOS transistor Q2, and the gate of the second MOS transistor Q2 is the second signal terminal; when the monitoring module 500 monitors that the current between the battery module 100 and the control module 200 is less than or equal to the current threshold, it outputs a switching signal through the signal output terminal CO; the second switch module 410 receives the switching signal through the second signal terminal; if the switching signal is a first-level signal, the second switch module 410 will be cut off, and at this time, the battery module 100 is disconnected from the control module 200, while the first switch module 310 is turned on under the first-level signal, so that the electrical device can disconnect the second driving unit in the standby state and be powered by the first driving unit 300 alone, thereby reducing the power consumption of the battery in the standby state.

[0046] As Figure 2 shown, in the embodiment of the present application, the first switch module 310 and the second switch module 410 are different MOS transistors. For example, the first MOS transistor Q1 is an N-type MOS transistor, and the second MOS transistor Q2 is a P-type MOS transistor. Therefore, when the switching signal is a high-level signal (i.e., the first-level signal), the first MOS transistor Q1 is turned on, and the second MOS transistor Q2 is cut off, so as to ensure that when the electrical device is in the standby state, the second driving unit 400 between the battery module 100 and the control module 200 is disconnected, and the first driving unit 300 is turned on. The battery module 100 can be powered by the small current of the first driving unit 300 when the electrical device is in the standby state, thereby reducing the power consumption of the battery module 100.

[0047] When the switch signal is a low-level signal, the first MOS transistor Q1 is turned off and the second MOS transistor Q2 is turned on, so as to ensure that when the electrical device is in a normal working state, the first driving unit 300 between the battery module 100 and the control module 200 is disconnected, while the second driving unit 400 is turned on. This enables the battery module 100 to supply power through the large current of the second driving unit 400 when the electrical device is in a normal working state, thereby ensuring the normal operation of the control module.

[0048] As Figure 3 shown, in some embodiments of the present application, the first MOS transistor Q1 may also be a P-type MOS transistor, and the second MOS transistor Q2 may also be an N-type MOS transistor. At this time, when the switch signal is a low-level signal (i.e., the first level signal), the first MOS transistor Q1 is turned on and the second MOS transistor Q2 is turned off, so as to ensure that when the electrical device is in a standby state, it can be powered through the small current of the first driving unit 300. When the switch signal is a high level, the first MOS transistor Q1 is turned off and the second MOS transistor Q2 is turned on, so as to ensure that when the electrical device is in a normal working state, it can be powered through the large current of the second driving unit 400, thereby ensuring the normal operation of the control module.

[0049] As Figure 4 shown, in an embodiment of the present application, the monitoring module 500 has a first output terminal and a second output terminal, the first switch module 310 has a first signal terminal, the second switch module 410 has a second signal terminal, the first output terminal is connected to the first signal terminal, and the second output terminal is connected to the second signal terminal; the first output terminal is configured to output a first level signal; the second output terminal is configured to output a second level signal; the first switch module 310 connects the battery module 100 and the control module 200 in response to the received second level signal; the second switch module 410 disconnects the connection between the battery module 100 and the control module 200 in response to the received first level signal. Specifically, the monitoring module 500 includes a fuel gauge chip U2, the fuel gauge chip U2 has a first signal terminal CX and a second signal terminal CY, and the first switch module 310 and the second switch module 410 are both the same MOS transistors. Therefore, the monitoring module 500 respectively sends out the first level signal and the second level signal through the first signal terminal CX and the second signal terminal CY, so as to enable the first switch module 310 and the second switch module 410 to be turned on and off respectively when the electrical device is in different states.

[0050] As Figure 4As shown, in some embodiments of the present application, the first MOS transistor Q1 is an N-type MOS transistor, and the second MOS transistor Q2 is an N-type MOS transistor; thus, when the first level signal is a high-level signal and the second level signal is a low-level signal, the first MOS transistor Q1 is turned on, while the second MOS transistor Q2 is turned off. At this time, the electrical device is in a standby state, and the battery module 100 supplies power to the control module 200 through the first driving unit 300; or, in some other embodiments of the present application, the first MOS transistor Q1 is a P-type MOS transistor, and the second MOS transistor Q2 is a P-type MOS transistor. Therefore, when the first level signal is a low-level signal and the second level signal is a high-level signal, the first MOS transistor Q1 is turned on, while the second MOS transistor Q2 is turned off. At this time, the electrical device is in a standby state, and the battery module 100 supplies power to the control module 200 through the first driving unit 300. Correspondingly, if the electrical device is in a normal working state, only by converting the level of the switch signal can the first MOS transistor Q1 be turned off and the second MOS transistor Q2 be turned on, so as to ensure that the electrical device can work normally.

[0051] As Figures 2 to 4 shown, in the embodiments of the present application, the monitoring module 500 has a data output terminal SDA and a clock output terminal SCL, and the control module 200 has a data input terminal SDA_0 and a clock input terminal SCL_0. The data output terminal SDA is connected to the data input terminal SDA_0, and the clock output terminal SCL is connected to the clock input terminal SCL_0. Specifically, the data output terminal SDA (Serial Data, serial data line) and the clock output terminal SCL (Serial Clock, serial clock line) are two signal lines used for communication on the I2C (Inter-Integrated Circuit) bus. Among them, SDA is used as the signal line for transmitting data on the I2C bus. All data transmissions, including sending and receiving, are carried out through the SDA line. The data transmission between the slave device and the master device (usually a microcontroller or a processor) is carried out serially on the SDA line with the assistance of the clock pulses of SCL. SCL is the clock signal line of the I2C bus, which is used to provide clock pulses to synchronize data transmission. The master device drives the data transmission by controlling the clock pulse speed on the SCL line. The data is transmitted at the rising edge or falling edge of each clock cycle. Among them, the function of the data input terminal SDA_0 is the same as that of the data output terminal SDA, and the function of the clock input terminal SCL_0 is the same as that of the clock output terminal SCL. The embodiments of the present application will not elaborate on this here.

[0052] As Figures 2 to 4As shown, in the embodiment of the present application, the monitoring module 500 has a voltage input terminal BAT and a ground terminal GND. The voltage input terminal BAT is connected to the positive electrode of the battery module 100, and the ground terminal GND is connected to the negative electrode of the battery module 100. Specifically, the fuel gauge chip U2 is connected to the positive electrode of the battery module 100 through the BAT pin, and is used to obtain the voltage of the battery module 100 and use it as the working voltage for calculation and display, so as to obtain the voltage of the battery module 100. Specifically, the function of the BAT pin is to input the voltage signal of the battery module 100 into the fuel gauge chip U2 by connecting to the positive electrode of the battery module 100. The fuel gauge chip U2 will read the voltage on the BAT pin and convert it into the corresponding battery module 100 power percentage or voltage value. By regularly measuring the voltage of the battery module 100, the fuel gauge chip U2 can estimate the remaining power of the battery by comparing it with a preset voltage threshold.

[0053] As Figures 2 to 4 shown, in the embodiment of the present application, the current limiting module 320 includes a plurality of resistors, and the plurality of resistors are connected in series or in parallel with each other. Specifically, by adding a plurality of resistors in the first driving unit 300, the impedance of the first driving unit 300 can be increased, thereby reducing the current in the first driving unit 300, so that the electrical device can be powered by a small current when in standby. In the embodiment of the present application, the current limiting module 320 includes a first resistor R1 and a second resistor R2 connected in parallel with each other. By the first resistor R1 and the second resistor R2 connected in parallel, the current of the first driving unit 300 can be reduced. At the same time, when any one of the first resistor R1 and the second resistor R2 fails, the remaining one resistor can still achieve the effect of reducing the current, thereby playing a protective effect.

[0054] In some embodiments of the present application, the current limiting module 320 can also protect a plurality of resistors connected in series. By the plurality of resistors connected in series, the current of the first driving unit 300 can be effectively controlled, so as to ensure that the electrical device can be powered by a small current when in standby.

[0055] As Figures 2 to 4 shown, in the embodiment of the present application, a third resistor R3 is further connected between the first signal terminal CX and the gate of the first MOS transistor Q1. The third resistor R3 is used to limit the voltage at the gate of the first MOS transistor Q1, playing a voltage dividing role, so as to avoid burning out the first MOS transistor Q1 due to the excessive level of the output signal of the first signal terminal CX.

[0056] As Figures 2 to 4As shown, in the embodiment of the present application, the driving circuit further includes a protection module 330. The protection module 330 is connected in parallel with the first switch module 310. The protection module 330 includes a plurality of capacitors, and the plurality of capacitors are connected in series with each other. Specifically, the protection module 330 includes a first capacitor C1 and a second capacitor C2 connected in series with each other. By connecting the first capacitor C1 and the second capacitor C2 in parallel across the two ends of the first MOS transistor Q1, it can provide ESD (Electrostatic Discharge) protection for the first MOS transistor Q1. ESD protection is a measure used to protect electronic devices from damage caused by electrostatic discharge. Electrostatic discharge refers to the discharge that occurs between charges when an object comes into contact with or approaches an object with static charges. This discharge can generate high-voltage and high-energy pulses, causing transient voltage damage and overcurrent to electronic devices, resulting in a decline in device performance or even complete failure. When protecting the first MOS transistor Q1, using a plurality of capacitors is a common ESD protection method. These capacitors are usually placed between the two ports (i.e., the source and the drain) of the MOS transistor to provide protection against ESD events.

[0057] Correspondingly, connecting the first capacitor C1 and the second capacitor C2 in parallel across the two ends of the first MOS transistor Q1 enables the energy of the electrostatic discharge to be absorbed by the first capacitor C1 and the second capacitor C2, thereby reducing the energy transmitted to the first MOS transistor Q1. The first capacitor C1 and the second capacitor C2 act as an energy absorber, dispersing the energy over a larger path. The first capacitor C1 and the second capacitor C2 can also adjust and attenuate the pulse voltage in an ESD event. When the pulse voltage reaches the first capacitor C1 and the second capacitor C2, it will be driven by the capacitors, thereby reducing the voltage reflected back to the first MOS transistor Q1. Speed limitation: The first capacitor C1 and the second capacitor C2 can also limit the rising speed of the ESD event. By increasing the equivalent resistance of the first capacitor C1 and the second capacitor C2, the speed of voltage change can be slowed down, thereby reducing the voltage stress on the first MOS transistor Q1.

[0058] As Figures 2 to 4As shown, in some embodiments of the present application, the battery module 100 includes a battery S1, and the control module 200 includes a control chip U1. The positive electrode of the battery S1 is connected to the positive electrode of the control chip U1, and the negative electrode of the battery S1 is connected to the negative electrode of the control chip U1. The drain of the first MOS transistor Q1 is connected to the positive electrode of the battery S1, and the source of the first MOS transistor Q1 is connected to one end of the first resistor R1 and the second resistor R2. The drain of the second MOS transistor Q2 is connected to the positive electrode of the battery S1, and the source of the second MOS transistor Q2 is connected to the positive electrode of the control chip U1. The gates of the first MOS transistor Q1 and the second MOS transistor Q2 are both connected to the fuel gauge chip U2. According to the different types of the first MOS transistor Q1 and the second MOS transistor Q2, the ports connecting the gates of the first MOS transistor Q1 and the second MOS transistor Q2 to the fuel gauge chip U2 are changed, so as to realize the separate conduction and cut-off of the first driving unit 300 and the second driving unit 400.

[0059] As Figure 5 As shown, the embodiments of the present application provide an electrical device, which includes: a battery module; a control module, the control module is connected to the battery module; and a driving circuit provided in any one of the above embodiments, the driving circuit is connected between the battery module and the control module to drive the control module. Through the driving circuit provided by the embodiments of the present application, it is possible to supply power to the electrical device with a small current in the standby state, thereby not only saving the electrical energy of the battery, but also extending the service life of the battery.

[0060] The above has introduced in detail a driving circuit and an electrical device provided by the embodiments of the present application. Specific examples are used in this article to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the technical solution and its core idea of the present application; those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A driving circuit, characterized in that: include: A first drive unit (300), the first drive unit (300) comprising a first switch module (310) and a current limiting module (320), the first switch module (310) and the current limiting module (320) being connected in series and connected between the battery module (100) and the control module (200); a second drive unit (400), the second drive unit (400) being connected in parallel with the first drive unit (300), the second drive unit (400) comprising a second switch module (410), the second switch module (410) being connected between the battery module (100) and the control module (200); The current output by the first driving unit (300) is smaller than the current output by the second driving unit (400).

2. The driving circuit according to claim 1, characterized in that: The driving circuit further comprises a monitoring module (500), wherein the monitoring module (500) is connected to the control module (200); The monitoring module (500) is configured to monitor the current between the battery module (100) and the control module (200), and in response to the current being less than or equal to a current threshold, to issue a switch signal, wherein the switch signal is configured to indicate that the first switch module (310) is turned on and the second switch module (410) is turned off.

3. The driving circuit according to claim 2, characterized in that: The monitoring module (500) has a signal output terminal, and the signal output terminal is configured to output the switch signal; The first switch module (310) has a first signal end, the second switch module (410) has a second signal end, and the first signal end and the second signal end are respectively connected to the signal output end.

4. The driving circuit according to claim 2, characterized in that: The switch signal comprises a first level signal and a second level signal, the monitoring module (500) has a first output end and a second output end, the first switch module (310) has a first signal end, the second switch module (410) has a second signal end, the first output end is connected to the first signal end, and the second output end is connected to the second signal end; The first output terminal is configured to output the first level signal so that the first switch module (310) is turned on in response to the first level signal; The second output terminal is configured to output the second level signal, so that the second switch module (410) is disconnected in response to the second level signal.

5. The driving circuit according to claim 2, characterized in that: The monitoring module (500) has a data output terminal, and the control module (200) has a data input terminal, wherein the data output terminal is connected to the data input terminal.

6. The driving circuit according to claim 2, characterized in that: The monitoring module (500) has a clock output terminal, the control module (200) has a clock input terminal, and the clock output terminal is connected to the clock input terminal.

7. The driving circuit according to claim 2, characterized in that: The monitoring module (500) has a voltage input terminal and a ground terminal, the voltage input terminal is connected to the positive electrode of the battery module (100), and the ground terminal is connected to the negative electrode of the battery module (100).

8. The driving circuit according to claim 1, characterized in that: The current limiting module (320) comprises a plurality of resistors, and the plurality of resistors are connected in series or in parallel.

9. The driving circuit according to claim 1, characterized in that: The driving circuit further comprises a protection module (330), the protection module (330) being connected in parallel with the first switch module (310), and the protection module (330) comprising a plurality of capacitors, which are connected in series.

10. An electrical device, characterized in that: The electrical equipment includes: Battery module; A control module connected to the battery module; and The drive circuit according to any one of claims 1 to 9, wherein the drive circuit is connected between the battery module and the control module to drive the control module.

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