Touch switch wake-up circuit, battery management system, battery pack and electric equipment

Abstract

A touch switch wake-up circuit is electrically connected with a first power supply, and comprises a touch switch electrically connected with the first power supply; the first switch unit is electrically connected with a first power supply, a grounding end and an external circuit; a second switch unit electrically connecting the touch switch and the first switch unit; the energy storage unit is electrically connected with the touch switch, the second switch unit and the first switch unit; the touch switch wake-up circuit is configured as follows: when the touch switch is released, the second switch unit is conducted so as to electrically connect the first end of the energy storage unit and the second end of the energy storage unit.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the technical field of electronic circuit, in particular to a light touch switch wake-up circuit, a battery management system, a battery pack and a power consuming device. BACKGROUND

[0002] A battery is a device that converts external energy into electrical energy and stores it inside, to supply power to external devices at the required time, and is widely used in consumer electronics, aerospace, energy storage and new energy vehicles.

[0003] A battery pack usually includes a cell module and a BMS (Battery Management System). The BMS is a system for managing and protecting the battery pack. The BMS has an electronic unit that wakes up first and works later, such as a DC-DC converter. The DC-DC converter converts the voltage of the cell module to supply power to the BMS. CONTENT OF THE INVENTION

[0004] Embodiments of the present application provide a light touch switch wake-up circuit, a battery management system, a battery pack and a power consuming device.

[0005] In a first aspect, the embodiments of the present application provide a light touch switch wake-up circuit electrically connected to a first power supply. The light touch switch wake-up circuit includes: a light touch switch electrically connected to the first power supply; a first switch unit electrically connected to the first power supply, a ground terminal and an external circuit; a second switch unit electrically connected to the light touch switch and the first switch unit; and an energy storage unit electrically connected to the light touch switch, the second switch unit and the first switch unit. The light touch switch wake-up circuit is configured to: release the light touch switch, and turn on the second switch unit to electrically connect a first end of the energy storage unit and a second end of the energy storage unit.

[0006] After releasing the light touch switch, the electrical energy in the energy storage unit is quickly discharged through the second switch unit, so that the electrical energy in the energy storage unit is discharged faster. For quickly pressing and releasing the light touch switch alternately, it is helpful to better identify the next pressing of the light touch switch, and then more reliably output a wake-up signal, which is used to wake up the external circuit.

[0007] In one or more embodiments, the energy storage unit includes a first capacitor and a first diode; the first capacitor is arranged between the light touch switch and an anode of the first diode, and a cathode of the first diode is electrically connected to the first switch unit; the second switch unit includes a first switch and a first resistor; the first switch is connected in parallel with the first capacitor and is arranged between the light touch switch and the anode of the first diode; a first end of the first resistor is electrically connected to the light touch switch, the first capacitor and a second end of the first switch, and a second end of the first resistor is electrically connected to a first end of the first switch and the cathode of the first diode.

[0008] In one or more embodiments, the first switch is an N-type FET, the first end of the first switch is a gate, the second end of the first switch is a drain, and the third end of the first switch is a source; or the first switch is an NPN-type triode, the first end of the first switch is a base, the second end of the first switch is a collector, and the third end of the first switch is an emitter.

[0009] In one or more embodiments, the first switch unit includes a second switch and a third switch, the second switch is disposed between the first power supply and the external circuit, and the third switch is disposed between the energy storage unit and the second switch; the second switch is configured to follow the on-off state of the third switch.

[0010] In one or more embodiments, the first switch unit further includes a second resistor, a third resistor, a fourth resistor, and a fifth resistor; the first end of the second resistor is electrically connected to the energy storage unit; the first end of the third resistor, the second end of the second resistor, and the first end of the third switch are electrically connected to the first node, the second end of the third resistor and the third end of the third switch are electrically connected to the ground end; the fourth resistor is disposed between the second end of the third switch and the first end of the second switch; the fifth resistor is disposed between the first end of the second switch and the third end of the second switch; the third end of the second switch is electrically connected to the first power supply, and the second end of the second switch is electrically connected to the external circuit.

[0011] In one or more embodiments, the second switch is a P-type FET or a PNP-type triode, the first end of the second switch is a gate of the P-type FET or a base of the PNP-type triode, the second end of the second switch is a drain of the P-type FET or a collector of the PNP-type triode, and the third end of the second switch is a source of the P-type FET or an emitter of the PNP-type triode; the third switch is an N-type FET or an NPN-type triode, the first end of the third switch is a gate of the N-type FET or a base of the NPN-type triode, the second end of the third switch is a drain of the N-type FET or a collector of the NPN-type triode, and the third end of the third switch is a source of the N-type FET or an emitter of the NPN-type triode.

[0012] In one or more embodiments, the tactile switch wake-up circuit further includes a collection unit and a micro-control unit; the collection unit is electrically connected to the first switch unit, the ground end, and the micro-control unit; the tactile switch wake-up circuit is configured to output a collection signal to the micro-control unit when the tactile switch is pressed.

[0013] In one or more embodiments, the acquisition unit comprises a fourth switch, a sixth resistor, a seventh resistor and an eighth resistor; a first end of the sixth resistor is electrically connected to the second power supply; a second end of the sixth resistor, a second end of the fourth switch and the micro control unit are electrically connected to the second node; a first end of the seventh resistor is electrically connected to the first switch unit; a second end of the seventh resistor, a first end of the eighth resistor and a first end of the fourth switch are electrically connected to the third node; a second end of the eighth resistor and a third end of the fourth switch are electrically connected to the ground.

[0014] In one or more embodiments, the fourth switch is an N-type FET, a first end of the fourth switch is a gate, a second end of the fourth switch is a drain, and a third end of the fourth switch is a source; or, the fourth switch is an NPN-type triode, a first end of the fourth switch is a base, a second end of the fourth switch is a collector, and a third end of the fourth switch is an emitter.

[0015] In one or more embodiments, the fourth switch is an N-type FET, a first end of the fourth switch is a gate, a second end of the fourth switch is a drain, and a third end of the fourth switch is a source; or, the fourth switch is an NPN-type triode, a first end of the fourth switch is a base, a second end of the fourth switch is a collector, and a third end of the fourth switch is an emitter.

[0016] In one or more embodiments, the external circuit comprises a voltage conversion unit.

[0017] In one or more embodiments, the fourth switch is an N-type FET, a first end of the fourth switch is a gate, a second end of the fourth switch is a drain, and a third end of the fourth switch is a source; or, the fourth switch is an NPN-type triode, a first end of the fourth switch is a base, a second end of the fourth switch is a collector, and a third end of the fourth switch is an emitter.

[0018] In one or more embodiments, the fourth switch is an N-type FET, a first end of the fourth switch is a gate, a second end of the fourth switch is a drain, and a third end of the fourth switch is a source; or, the fourth switch is an NPN-type triode, a first end of the fourth switch is a base, a second end of the fourth switch is a collector, and a third end of the fourth switch is an emitter. BRIEF DESCRIPTION OF DRAWINGS

[0019] One or more embodiments are illustrated by way of example in the figures that form a part of this patent document, and which do not limit the scope of embodiments. Elements having the same reference numerals in different figures indicate like elements.

[0020] Figure 1 is a composition schematic of the touch switch wake-up circuit provided by the embodiments of the present application Figure 1 ;

[0021] Figure 2 is a composition schematic of the touch switch wake-up circuit provided by the embodiments of the present application Figure 2 ;

[0022] Figure 3 is a circuit structure schematic of the touch switch wake-up circuit provided by the embodiments of the present application Figure 1 ;

[0023] Figure 4Figure 1 is a circuit structure schematic of a touch switch wake-up circuit provided by an embodiment of the present application Figure 2 ;

[0024] Figure 5 Figure 1 is a circuit structure schematic of a touch switch wake-up circuit provided by an embodiment of the present application Figure 3 ;

[0025] Figure 6 Figure 1 is a circuit structure schematic of a touch switch wake-up circuit provided by an embodiment of the present application Figure 3 ;

[0026] Figure 7 Figure 1 is a circuit structure schematic of a touch switch wake-up circuit provided by an embodiment of the present application Figure 4 ;

[0027] Figure 8 Figure 1 is a circuit structure schematic of a touch switch wake-up circuit provided by an embodiment of the present application Figure 5 ;

[0028] Figure 9 Figure 1 is a circuit structure schematic of a touch switch wake-up circuit provided by an embodiment of the present application Figure 6 ;

[0029] Figure 10 Figure 1 is a circuit structure schematic of a touch switch wake-up circuit provided by an embodiment of the present application DETAILED DESCRIPTION

[0030] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and in detail below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application.

[0031] It should be noted that when one element is described as being "connected" to another element, it can be directly connected to the other element or one or more intermediate elements can be present therebetween.

[0032] In addition, the technical features involved in each of the embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0033] Please refer to Figure 1 , Figure 1 Figure 1 is a circuit structure schematic of a touch switch wake-up circuit provided by an embodiment of the present application. As shown in Figure 1 Figure 1, the touch switch wake-up circuit 100 is electrically connected to a first power supply V1, and the touch switch wake-up circuit 100 includes a touch switch K1, a first switch unit 10, a second switch unit 20 and an energy storage unit 30.

[0034] Tactile switch K1 is electrically connected to the first power supply V1. The tactile switch (also called a push-button switch or touch switch) K1 is an electronic switch that activates its internal mechanical structure by applying pressure, thereby connecting or disconnecting the circuit. Specifically, tactile switch K1 connects the circuit when pressed and disconnects it when released. First switching unit 10 is electrically connected to the first power supply V1, ground terminal GND, and external circuit 200. Second switching unit 20 is electrically connected to tactile switch K1 and first switching unit 10. Energy storage unit 30 is electrically connected to tactile switch K1, second switching unit 20, and first switching unit 10.

[0035] The tactile switch wake-up circuit 100 is configured such that: when the tactile switch K1 is released, the second switching unit 20 is turned on, electrically connecting the first terminal of the energy storage unit 30 to the second terminal of the energy storage unit 30. After the tactile switch K1 is released, the electrical energy stored in the energy storage unit 30 is quickly discharged through the second switching unit 20, allowing the voltage of the energy storage unit 30 to recover more quickly, which helps to better identify the next press of the tactile switch K1 and output a wake-up signal more reliably. Specifically, when the tactile switch K1 switches from released to pressed, the first power supply V1 charges the energy storage unit 30, and the energy storage unit 30 stores electrical energy. At this time, current flows through the energy storage unit 30 to the first switching unit 10, causing the first switching unit 10 to turn on quickly. The first power supply V1 outputs a wake-up signal to the external circuit 200 through the first switching unit 10. The less electrical energy stored in the energy storage unit 30 before the tactile switch K1 is pressed, the larger the current driving the first switching unit 10 to turn on, and the more reliably the first switching unit 10 is driven to turn on and the wake-up signal is output. Similarly, for the rapid connection of alternating pressing and releasing of the tactile switch K1, the energy of the energy storage unit 30 is rapidly released each time the tactile switch K1 is released, so that the wake-up signal is reliably output each time the tactile switch K1 is pressed.

[0036] In some embodiments, such as Figure 2 As shown, the energy storage unit 30 includes a first capacitor C1 and a first diode D1. The first capacitor C1 is located between the tactile switch K1 and the anode of the first diode D1, and the cathode of the first diode D1 is electrically connected to the first switching unit 10.

[0037] The second switching unit 20 includes a first switch Q1 and a first resistor R1. The first switch Q1 is connected in parallel with the first capacitor C1 and is located between the tactile switch K1 and the anode of the first diode D1. The first end of the first resistor R1 is electrically connected to the tactile switch K1, the first capacitor C1 and the second end of the first switch Q1, and the second end of the first resistor R1 is electrically connected to the first end of the first switch Q1 and the cathode of the first diode D1.

[0038] In some embodiments, the first switch unit 10 includes a second switch Q2 and a third switch Q3, the second switch Q2 is disposed between the first power supply VI and the external circuit 200, and the third switch Q3 is disposed between the energy storage unit 10 and the second switch Q2.

[0039] The second switch Q2 is configured to follow the on-off state of the third switch Q3, i.e., the second switch Q2 is turned on when the third switch Q3 is turned on, and the second switch Q2 is turned off when the third switch Q3 is turned off.

[0040] In some embodiments, as shown in Figure 3 The first switch unit 10 further includes a second resistor R2, a third resistor R3, a fourth resistor R4, and a fifth resistor R5.

[0041] The first end of the second resistor R2 is electrically connected to the energy storage unit 30, the first end of the third resistor R3, the second end of the second resistor R2, and the first end of the third switch Q3 are electrically connected to the first node N1, the second end of the third resistor R3 and the third end of the third switch Q3 are electrically connected to the ground end GND. The fourth resistor R4 is disposed between the second end of the third switch Q3 and the first end of the second switch Q2. The fifth resistor R5 is disposed between the first end of the second switch Q2 and the third end of the second switch Q2. The third end of the second switch Q2 is electrically connected to the first power supply VI, and the second end of the second switch Q2 is electrically connected to the external circuit 200.

[0042] Specifically, the second resistor R2 and the third resistor R3 divide the voltage at the cathode of the first diode D1, and the voltage division of the first diode D1 cathode on the third resistor R3 drives the third switch Q3 to turn on. The third resistor R3 also plays a role in discharging the electric quantity when the third switch Q3 is turned off, ensuring that the third switch Q3 can be reliably turned off. The fifth resistor R5 generates a voltage drop when the third switch Q3 is turned on, driving the second switch Q2 to turn on, and plays a role in discharging the electric quantity when the second switch Q2 is turned off, ensuring that the second switch Q2 can be reliably turned off.

[0043] In Figure 3 When the tactile switch K1 is pressed, the first power supply VI charges the first capacitor C1 through the tactile switch K1, and the first switch Q1 remains off. At this time, the current flows through the first capacitor C1 to the third switch Q3, so that the third switch Q3 is turned on, and the second switch Q2 is also turned on, and the first power supply VI outputs the wake-up signal to the external circuit 200 through the second switch Q2.

[0044] When the touch switch K1 is released, the voltage on the first capacitor C1 acts on the first resistor R1 to generate a current on the first resistor R1. The current acts on the first switch Q1 to turn on the first switch Q1, and the first capacitor C1 is quickly discharged through the first switch Q1. The current flowing to the third switch Q3 quickly decreases until the third switch Q3 is turned off, and the second switch Q2 is also turned off and stops outputting the wake-up signal.

[0045] When the touch switch K1 is short-circuited due to an abnormality (for example, the mechanical part inside the touch switch K1 no longer normally rebounds, causing the two conductive contact points to always be in a connected state), the first capacitor C1 is full and is equivalent to an open circuit. At this time, the existing loop of the touch switch wake-up circuit 100 is: the first power supply V1, the touch switch K1, the first resistor R1, the second resistor R2, the third resistor R3, and the ground terminal GND. By increasing the resistance value of the first resistor R1, the power consumption of the touch switch wake-up circuit 100 is reduced.

[0046] In some embodiments, as shown in FIG. 1, the first switch Q1 is an NPN transistor, the first end of the first switch Q1 is the base of the NPN transistor, the second end of the first switch Q1 is the collector of the NPN transistor, and the third end of the first switch Q1 is the emitter of the NPN transistor. Figure 4 When the first switch Q1 is an NPN transistor, the NPN transistor works in the amplification zone when it is turned on, amplifies the current between the collector and the emitter of the NPN transistor, and speeds up the discharge of electrical energy on the first capacitor C1.

[0047] In other embodiments, the first switch Q1 is an N-type FET, the first end of the first switch Q1 is the gate of the N-type FET, the second end of the first switch Q1 is the drain of the N-type FET, and the third end of the first switch Q1 is the source of the N-type FET.

[0048] In some embodiments, as shown in FIG. 1, the second switch Q2 is a PNP transistor, the first end of the second switch Q2 is the base of the PNP transistor, the second end of the second switch Q2 is the collector of the PNP transistor, and the third end of the second switch Q2 is the emitter of the PNP transistor. Figure 4 When the second switch Q2 is a PNP transistor, the PNP transistor works in the amplification zone when it is turned on, amplifies the current between the collector and the emitter of the PNP transistor, and speeds up the discharge of electrical energy on the first capacitor C1.

[0049] In other embodiments, the second switch Q2 is a P-type FET, the first end of the second switch Q2 is the gate of the P-type FET, the second end of the second switch Q2 is the drain of the P-type FET, and the third end of the second switch Q2 is the source of the P-type FET.

[0050] In some embodiments, as shown in FIG. 1, the third switch Q3 is an NPN transistor, the first end of the third switch Q3 is the base of the NPN transistor, the second end of the third switch Q3 is the collector of the NPN transistor, and the third end of the third switch Q3 is the emitter of the NPN transistor. Figure 4 When the third switch Q3 is an NPN transistor, the NPN transistor works in the amplification zone when it is turned on, amplifies the current between the collector and the emitter of the NPN transistor, and speeds up the discharge of electrical energy on the first capacitor C1.

[0051] In some embodiments, the third switch Q3 is an N-type FET, the first end of the third switch Q3 is the gate of the N-type FET, the second end of the third switch Q3 is the drain of the N-type FET, and the third end of the third switch Q3 is the source of the N-type FET.

[0052] In some embodiments, as shown in FIG. 1B, the tactile switch wake-up circuit 100 further comprises a second diode D2. The anode of the second diode D2 is electrically connected to the cathode of the first diode D1, and the cathode of the second diode D2 is electrically connected to the second resistor R2. The second diode D2 is used to prevent current from flowing backward. Figure 5 In some embodiments, as shown in FIG. 1C, the tactile switch wake-up circuit 100 further comprises a collection unit 40 and a micro-control unit 50, wherein,

[0053] Figure 6 For example, as shown in FIG. 1D, the collection unit 40 and the micro-control unit 50 are added on the basis of the circuit structure shown in FIG. 1C. As shown in FIG. 1D, the collection unit 40 is electrically connected to the first switch unit 10, the ground terminal GND, and the micro-control unit 50. Figure 6 Figure 1 For example, as shown in FIG. 1D, the collection unit 40 and the micro-control unit 50 are added on the basis of the circuit structure shown in FIG. 1C. As shown in FIG. 1D, the collection unit 40 is electrically connected to the first switch unit 10, the ground terminal GND, and the micro-control unit 50. Figure 6

[0054] The tactile switch wake-up circuit 100 is configured to: press the tactile switch K1, and the collection unit 40 outputs a collection signal to the micro-control unit 50. Then, the micro-control unit 50 determines that the tactile switch K1 has been pressed according to the collection signal.

[0055] In some embodiments, the micro-control unit 50 determines the frequency of pressing the tactile switch K1 by determining the pressing of the tactile switch K1 multiple times.

[0056] In some embodiments, the micro-control unit 50 determines the duration of pressing the tactile switch K1 by starting timing from determining that the tactile switch K1 is pressed.

[0057] Figure 7 For example, as shown in FIG. 1E, the circuit structure of the collection unit 40 and the micro-control unit 50 is added on the basis of the circuit structure shown in FIG. 1D. As shown in FIG. 1E, the collection unit 40 comprises a fourth switch Q4, a sixth resistor R6, a seventh resistor R7, and an eighth resistor R8. Figure 5 Figure 7

[0058] ​​​​​The first end of the sixth resistor R6 is electrically connected to the second power supply V2. The second end of the sixth resistor R6, the second end of the fourth switch Q4, and the micro control unit 50 are electrically connected to the second node N2. The first end of the seventh resistor R7 is electrically connected to the first switch unit 10. The second end of the seventh resistor R7, the first end of the eighth resistor R8, and the first end of the fourth switch Q4 are electrically connected to the third node N3. The second end of the eighth resistor R8 and the third end of the fourth switch Q4 are electrically connected to the ground terminal GND.

[0059] Specifically, according to the foregoing description, the light touch switch K1 is pressed, and the second switch Q2 is turned on. At this time, the first power supply V1 is input to the first end of the seventh resistor R7 through the second switch Q2. The voltage of the first power supply V1 is divided by the seventh resistor R7 and the eighth resistor R8, and the voltage of the first power supply V1 on the eighth resistor R8 (i.e. the voltage on the third node N3) acts on the fourth switch Q4, and the fourth switch Q4 is turned on. The second node N2 is electrically connected to the ground terminal GND through the fourth switch Q4, and the micro control unit 50 receives the acquisition signal, and the acquisition signal is a low-level signal, and the micro control unit 50 determines that the light touch switch K1 has been pressed. It can be understood that when the light touch switch K1 is not pressed, the second switch Q2 remains off, the first end of the seventh resistor R7 is not input with voltage, the fourth switch Q4 remains off, and the voltage of the second node N2 is the voltage of the second power supply V2, and the micro control unit 50 receives a high-level signal.

[0060] In some embodiments, as shown in Figure 8 , the fourth switch Q4 is an NPN type triode, the first end of the fourth switch Q4 is a base, the second end of the fourth switch Q4 is a collector, and the third end of the fourth switch Q4 is an emitter.

[0061] In other embodiments, the fourth switch Q4 is an N-type FET, the first end of the fourth switch Q4 is a gate, the second end of the fourth switch Q4 is a drain, and the third end of the fourth switch Q4 is a source.

[0062] In some embodiments, as shown in Figure 9 , the light touch switch wake-up circuit 100 further includes a ninth resistor R9 and a third diode D3.

[0063] The ninth resistor R9 is electrically connected between the second end of the second switch Q2 and the anode of the third diode D3, and the cathode of the third diode D3 is electrically connected to the external circuit 200. The ninth resistor R9 is used for current limiting, and the third diode D3 is used for preventing current from flowing back.

[0064] Please refer to Figure 10 , Figure 10 The composition schematic diagram of the battery management system provided by the embodiments of the present application is shown in Figure 10As shown, the battery management system 1000 includes an external circuit 200 and the tactile switch wake-up circuit 100 in any of the embodiments of the present application.

[0065] The tactile switch wake-up circuit 100 is electrically connected to the external circuit 200, and is configured to output a wake-up signal to the external circuit 200 in response to the first switch unit 10 being turned on.

[0066] In some embodiments, the external circuit 100 includes a voltage conversion unit, for example, a DC-DC circuit or an LDO circuit. In other embodiments, the external circuit 100 includes a circuit that needs to receive an enable signal to enable operation.

[0067] The embodiments of the present application also provide a battery pack, which includes a battery module and the battery management system 1000 in any of the embodiments of the present application.

[0068] In some embodiments, the battery module is used to store and provide electrical energy, and the battery management system 1000 is used to monitor, manage and / or protect the battery module, etc. The battery module includes at least one battery unit, and when the battery module includes two or more battery units, the battery units are connected in series, connected in parallel, or connected in a mixed series-parallel connection. The battery unit includes a single cell or a cell module composed of multiple cells, and the cells in the cell module are connected in series, in parallel, or in a mixed connection.

[0069] The embodiments of the present application also provide an electrical equipment, which includes the battery pack in any of the embodiments of the present application.

[0070] In some embodiments, the electrical equipment includes a product powered by the battery pack, for example, a drone, an electric tool, an electric vehicle, etc.

[0071] The above only describes the embodiments of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation using the content of the specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.

[0072] The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; the technical features of the above embodiments or different embodiments can also be combined, and the steps can be implemented in any order. Those skilled in the art should understand that the technical solutions recorded in the above embodiments can still be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A tactile switch wake-up circuit electrically connected to a first power source, characterized by, The light touch switch wake-up circuit comprises: a light touch switch electrically connected to the first power supply; a first switch unit electrically connected to the first power supply, a ground terminal and an external circuit; a second switch unit electrically connected to the light touch switch and the first switch unit; a storage unit electrically connected to the light touch switch, the second switch unit and the first switch unit; when the light touch switch is released, the second switch unit is turned on to electrically connect the first end of the storage unit to the second end of the storage unit.

2. The tactile switch wake-up circuit of claim 1, wherein, The storage unit comprises a first capacitor and a first diode; the first capacitor is arranged between the light touch switch and the anode of the first diode, and the cathode of the first diode is electrically connected to the first switch unit; the second switch unit comprises a first switch and a first resistor; the first switch is connected in parallel with the first capacitor and arranged between the light touch switch and the anode of the first diode; the first end of the first resistor is electrically connected to the light touch switch, the first capacitor and the second end of the first switch, and the second end of the first resistor is electrically connected to the first end of the first switch and the cathode of the first diode.

3. The tactile switch wake-up circuit of claim 2, wherein, The first switch is an N-type FET, the first end of the first switch is a gate, the second end of the first switch is a drain, and the third end of the first switch is a source; or The first switch is an NPN-type transistor, the first end of the first switch is a base, the second end of the first switch is a collector, and the third end of the first switch is an emitter.

4. The tactile switch wake-up circuit of any one of claims 1-3, wherein, The first switch unit comprises a second switch and a third switch, the second switch is arranged between the first power supply and the external circuit, and the third switch is arranged between the storage unit and the second switch; The second switch is configured to follow the on-off state of the third switch.

5. The tactile switch wake-up circuit of claim 4, wherein, The first switch unit further comprises a second resistor, a third resistor, a fourth resistor and a fifth resistor; the first end of the second resistor is electrically connected to the storage unit; the first end of the third resistor, the second end of the second resistor and the first end of the third switch are electrically connected to a first node, the second end of the third resistor and the third end of the third switch are electrically connected to the ground terminal; the fourth resistor is arranged between the second end of the third switch and the first end of the second switch; the fifth resistor is arranged between the first end of the second switch and the third end of the second switch; the third end of the second switch is electrically connected to the first power supply, and the second end of the second switch is electrically connected to the external circuit.

6. The tactile switch wake-up circuit of claim 4 or 5, wherein, The second switch is a P-type FET or a PNP-type transistor, the first end of the second switch is a gate of a P-type FET or a base of a PNP-type transistor, the second end of the second switch is a drain of a P-type FET or a collector of a PNP-type transistor, and the third end of the second switch is a source of a P-type FET or an emitter of a PNP-type transistor. The third switch is an N-type FET or an NPN-type transistor, the first end of the third switch is a gate of the N-type FET or a base of the NPN-type transistor, the second end of the third switch is a drain of the N-type FET or a collector of the NPN-type transistor, and the third end of the third switch is a source of the N-type FET or an emitter of the NPN-type transistor.

7. The tactile switch wake-up circuit of any one of claims 1-6, wherein, Further comprising: a collection unit and a micro-control unit; the collection unit is electrically connected to the first switch unit, the ground end, and the micro-control unit; the micro-control unit is configured to output a wake-up signal to the external circuit in response to the first switch unit being turned on.

8. The tactile switch wake-up circuit of claim 7, wherein, the collection unit includes a fourth switch, a sixth resistor, a seventh resistor, and an eighth resistor; a first end of the sixth resistor is electrically connected to a second power supply; a second end of the sixth resistor, a second end of the fourth switch, and the micro-control unit are electrically connected to a second node; a first end of the seventh resistor is electrically connected to the first switch unit; a second end of the seventh resistor, a first end of the eighth resistor, and a first end of the fourth switch are electrically connected to a third node, and a second end of the eighth resistor and a third end of the fourth switch are electrically connected to the ground end.

9. The tactile switch wake-up circuit of claim 8, wherein, the fourth switch is an N-type FET, the first end of the fourth switch is a gate, the second end of the fourth switch is a drain, and the third end of the fourth switch is a source; or the fourth switch is an NPN-type transistor, the first end of the fourth switch is a base, the second end of the fourth switch is a collector, and the third end of the fourth switch is an emitter.

10. A battery management system, characterized by, an external circuit and the tactile switch wake-up circuit according to any one of claims 1-9; the tactile switch wake-up circuit is electrically connected to the external circuit and is configured to output a wake-up signal to the external circuit in response to the first switch unit being turned on.

11. The battery management system of claim 10, wherein, the external circuit includes a voltage conversion unit.

12. A battery pack, characterized by a battery module and the battery management system according to claim 10 or 11.

13. An electrical device, characterized by a battery pack including the battery management system according to claim 12.

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