Key control circuit and vehicle
By setting up a processing component in the button control circuit to indirectly control the power supply of the functional components, the problem of increased contact resistance of traditional button switches under long-term use is solved, thereby extending the button life and improving system reliability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-24
- Publication Date
- 2026-03-20
AI Technical Summary
Traditional push-button switches experience increased contact resistance over long-term use and in complex environments, leading to slow response, failure, and additional power loss, which affects system efficiency and safety.
By setting up a processing component to connect the target button to the switch component, the closing or opening of the target button directly affects the closing and opening of the switch component, indirectly controlling the power supply of the functional component, avoiding high current passing through the contact point, and reducing wear and heat generation.
It extends the lifespan of buttons, reduces maintenance frequency, improves system reliability and hardware costs, and allows for the selection of lighter and more diverse button switches.
Smart Images
Figure CN224020166U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of vehicle communication, in particular to a key control circuit and a vehicle. BACKGROUND
[0002] In modern vehicles, the control of body function modules generally relies on the direct use of key switches to achieve start or stop. Although this design concept is widely adopted due to its simple and intuitive operation, it has a series of potential problems, especially in long-term use and complex environmental conditions. During use, all large currents must pass through the contact points of the key switch, which leads to wear and aging of the contact points. After a long period of use, the contact resistance will gradually increase, especially in water or humid environments, which will worsen the situation.
[0003] The increase of contact resistance not only affects the normal operation of the function module, causing slow response or failure, but also may cause additional power loss, reducing the overall efficiency of the system. In addition, under high current conditions, excessive contact resistance may also cause electric arc or overheating, further endangering the safety and functional stability of the key switch. Therefore, the limitations of traditional key switches in high load and harsh environments are increasingly evident. How to reduce the burden of key switches, prolong their service life, and ensure timely response of function module control has become a problem to be solved. CONTENT OF THE INVENTION
[0004] The embodiments of the present application provide a key control circuit and a vehicle to achieve the effects of prolonging the service life of the key and improving the stability of the system.
[0005] In a first aspect, the embodiments of the present application provide a key control circuit, comprising a key control component, a processing component, a switch component and a function component;
[0006] The output end of the key control component is connected to the first end of the processing component; the key control component is used to obtain the voltage value of the target key;
[0007] The second end of the processing component is connected to the first end of the switch component and an external power supply; the processing component is used to take the voltage value output by the key control component as a sampling voltage value, and determine the voltage value output to the switch component based on the sampling voltage value and a preset reference voltage value;
[0008] The second end of the switch component is connected to an external power supply, and the third end of the switch component is connected to the input end of the function component; the switch component is used to determine whether to supply power to the function component according to the voltage value obtained from the processing component.
[0009] In a possible implementation, the key control component includes the target key, one end of the target key is grounded, and the other end of the target key is connected to the first end of the processing component.
[0010] In a possible implementation, the processing component includes a driving module and a switching module.
[0011] The first end of the driving module is connected to the output end of the key control component, and the second end of the driving module is connected to the input end of the switching module and an external power supply.
[0012] The output end of the switching module is connected to the first end of the switching component.
[0013] The driving module is configured to adjust the voltage value output to the switching module based on the voltage value received by the first end and the voltage value provided by the external power supply.
[0014] The switching module is configured to adjust the voltage value output to the switching component based on the voltage value received by the input end, so as to control the switching component to be turned on or turned off, thereby controlling whether the switching component supplies power to the functional component.
[0015] In a possible implementation, the driving module includes a voltage control chip, a first diode, a first resistor, a second resistor, and a third resistor.
[0016] The first end of the voltage control chip is connected to the output end of the key control component in a manner that the first resistor and the first diode are connected in series, the second end of the voltage control chip is connected to the external power supply in a manner that the second resistor is connected in series, the second end of the voltage control chip is also connected to the input end of the switching module, and the third end of the voltage control chip is grounded.
[0017] One end of the third resistor is connected to the external power supply, and the other end of the third resistor is connected between the first resistor and the first diode.
[0018] In a possible implementation, the driving module further includes a first capacitor and a second capacitor.
[0019] One end of the first capacitor is connected between the first resistor and the first diode, and the other end of the first capacitor is grounded.
[0020] One end of the second capacitor is connected between the first resistor and the first end of the voltage control chip, and the other end of the second capacitor is grounded.
[0021] In a possible implementation, the switching module includes a triode, a fourth resistor, a fifth resistor, a sixth resistor, and a third capacitor.
[0022] The base of the triode is connected to the second end of the driving module in series with the fourth resistor, the collector of the triode is connected to the first end of the switch assembly in series with the fifth resistor, and the emitter of the triode is grounded.
[0023] The sixth resistor and the third capacitor are connected in parallel between the base and the emitter of the triode, respectively.
[0024] In a possible implementation, the switch assembly comprises a field effect transistor, a seventh resistor and a second diode.
[0025] The source of the field effect transistor is connected to an external power supply, the gate of the field effect transistor is connected to the second end of the processing assembly, and the drain of the field effect transistor is connected to the input end of the function assembly.
[0026] The seventh resistor and the second diode are connected in parallel between the gate and the source of the field effect transistor, respectively.
[0027] In a possible implementation, the key control circuit further comprises a protection assembly connected between the third end of the switch assembly and the input end of the function assembly.
[0028] The protection assembly is configured to perform negative voltage protection on the switch assembly when the switch assembly stops supplying power to the function assembly, so as to prevent the switch assembly from being burnt out.
[0029] In a possible implementation, the protection assembly comprises a third diode and a fourth capacitor.
[0030] One end of the third diode is connected between the third end of the switch assembly and the input end of the function assembly, and the other end of the third diode is grounded.
[0031] One end of the fourth capacitor is connected between the third end of the switch assembly and the input end of the function assembly, and the other end of the fourth capacitor is grounded.
[0032] In a second aspect, the embodiments of the present application provide a vehicle, which is equipped with the key control circuit of the first aspect and / or various possible implementations of the first aspect.
[0033] The key control circuit and the vehicle provided by the embodiment of the application are connected by the processing component, the target key is connected with the switch component, the closing or opening of the target key can directly act on the closing and opening of the switch component, thereby indirectly realizing the power supply control of the functional component, the circuit where the target key is located avoids the high current passing for the power supply of the functional component, thereby reducing the abrasion and heat generation of the contact point, effectively prolonging the service life of the target key, reducing the frequency of maintenance and replacement, and improving the reliability of the product; and since the target key only acts on the closing or opening of the switch component, the hardware requirement of the key control circuit for the target key is not high, which means that a lighter and more diversified key switch can be selected, thereby reducing the hardware cost of the key control circuit as a whole. BRIEF DESCRIPTION OF DRAWINGS
[0034] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and serve to explain the principles of the application.
[0035] Figure 1 A connection schematic diagram of the key control circuit provided by the application;
[0036] Figure 2 A structure schematic diagram of the key control component provided by the application;
[0037] Figure 3 A connection schematic diagram of another key control circuit provided by the application;
[0038] Figure 4 A structure schematic diagram of the driving module in the processing component of the key control circuit provided by the application;
[0039] Figure 5 A structure schematic diagram of the switch module in the processing component of the key control circuit provided by the application;
[0040] Figure 6 A structure schematic diagram of the switch component in the key control circuit provided by the application;
[0041] Figure 7 A connection schematic diagram of still another key control circuit provided by the application;
[0042] Figure 8 A structure schematic diagram of the protection component in the key control circuit provided by the application;
[0043] Figure 9 A structure schematic diagram of the vehicle provided by the application.
[0044] The specific embodiments of the application have been shown by way of example in the above figures, and will be described in more detail hereafter. These figures and detailed description are not meant to limit the scope of the inventive concept in any way, but are meant to illustrate the inventive concept to one of ordinary skill in the art by reference to particular embodiments. DETAILED DESCRIPTION
[0045] The advantages and benefits of the application can be readily understood by those skilled in the art from the disclosure contained herein and from the description of specific embodiments. The application can be implemented or performed in other ways than those specifically described herein without departing from the spirit of the application. It should be noted that the following examples and features in the examples can be combined with each other in any way possible without conflict.
[0046] It should be noted that the drawings provided in the following examples are only schematic and are intended to provide a general understanding of the application. In particular, the shape, relative scale, and proportions of the various components shown in the drawings are not necessarily drawn to scale, and are shown merely to illustrate one of the embodiments of the application. The figures are used in the specification like words based on a drawing to describe the application.
[0047] Some of the example embodiments of the application have been described above, it should be understood that the application can be implemented or performed in other ways not specifically described herein without departing from the spirit of the application.
[0048] Please refer to Figure 1 In one embodiment, the application provides a key control circuit 100, comprising a key control component 110, a processing component 120, a switch component 130 and a function component 140.
[0049] The output end of the key control component 110 is connected to the first end of the processing component 120;
[0050] The second end of the processing component 120 is connected to the first end of the switch component 130 and the external power supply VCC;
[0051] The second end of the switch component 130 is connected to the external power supply VCC, and the third end of the switch component 130 is connected to the input end of the function component 140.
[0052] The key control component 110 is used to adjust the voltage value output by the processing component 120 to the switch component 130 based on the pressing condition of the target key in the key control component 110, to control the conduction or closing of the switch component 130, so as to control whether the switch component 130 supplies power to the function component.
[0053] AsFigure 2 As shown, the button control component 110 includes the target button S1, one end of the target button S1 is grounded, and the other end of the target button S1 is connected to the first end of the processing component 120.
[0054] As an example, when the button control circuit 100 is applied to a vehicle, the target button S1 of the button control component 110 may be, for example, a driving control related button (such as a start button, an off button, an electronic parking brake button, an auto hold button), a vehicle lighting control button (such as a low beam button, a high beam button, an interior lighting button), an air conditioning button, or other buttons that can be integrated and responded to via devices such as buttons and knobs.
[0055] Functional component 140 may be a vehicle functional component corresponding to the target button S1. For example, when the target button S1 is a driving control related button (such as a start button, an off button, or an electronic parking brake button), functional component 140 may be the corresponding engine or electronic parking brake; when the target button S1 is a vehicle lighting control button (such as a low beam button, a high beam button, or an interior lighting button), functional component 140 may be the corresponding low beam, high beam, or interior lighting; when the target button S1 is a vehicle horn control related button, functional component 140 may be the corresponding vehicle horn.
[0056] The aforementioned button control circuit connects the target button to the switch assembly via a processing component. The closing or opening of the target button directly affects the closing or opening of the switch assembly, thereby indirectly controlling the power supply to the functional components. The circuit containing the target button avoids the passage of high current for powering the functional components, thus reducing wear and heat generation at the contact points, effectively extending the lifespan of the target button, reducing the frequency of maintenance and replacement, and improving product reliability. Furthermore, since the target button only indirectly controls the closing or opening of the switch assembly, the hardware requirements for the target button are not high. This means that lighter and more versatile button switches can be selected, thereby reducing the overall hardware cost of the button control circuit.
[0057] like Figure 3 As shown, in one embodiment, the processing component 120 includes a drive module 121 and a switch module 122;
[0058] The first end of the drive module 121 is connected to the output end of the button control component 110, and the second end of the drive module 121 is connected to the input end of the switch module 122 and the external power supply VCC.
[0059] The output terminal of the switch module 122 is connected to the first terminal of the switch assembly 130;
[0060] The driving module 121 is configured to adjust the voltage value output to the switching module 122 based on the voltage value received by the first end and the voltage value provided by the external power supply VCC.
[0061] The switching module 122 is configured to adjust the voltage value output to the switching component 130 based on the voltage value received by the input end, so as to control the conduction or closing of the switching component 130, thereby controlling whether the switching component 130 supplies power to the functional component 140.
[0062] As shown in FIG. 1, in an embodiment, the driving module 121 comprises a voltage control chip U1, a first diode D1, a first resistor R1, a second resistor R2 and a third resistor R3. Figure 4
[0063] The first end of the voltage control chip U1 is connected to the output end of the key control component 110 in a manner that the first resistor R1 and the first diode D1 are connected in series, the second end of the voltage control chip U1 is connected to the external power supply VCC in a manner that the second resistor R2 is connected in series, the second end of the voltage control chip U1 is also connected to the input end of the switching module 122, and the third end of the voltage control chip U1 is grounded.
[0064] One end of the third resistor R3 is connected to the external power supply VCC, and the other end is connected between the first resistor R1 and the first diode D1.
[0065] The anode of the first diode D1 is connected to the first resistor R1, and the cathode of the first diode D1 is connected to the target key S1 in the key control component 110.
[0066] The voltage control chip U1 can collect the contact resistance of the target key S1, for example, and output a high voltage to the switching component 130 when the contact resistance of the target key S1 is less than a preset resistance threshold, and output no voltage to the switching component 130 when the contact resistance is greater than or equal to the preset resistance threshold, thereby realizing the control of the conduction or closing of the switching component.
[0067] As an example, the first resistor R1 and the third resistor R3 form a feedback network of the voltage control chip U1, and the voltage control chip U1 can be a three-terminal adjustable reference voltage chip, for example.
[0068] The voltage control chip U1 can realize accurate voltage regulation and stable output through the feedback network composed of the first resistor R1 and the third resistor R3.
[0069] As an example, the feedback network composed of the first resistor R1 and the third resistor R3 is used to divide the voltage outputted from the second end of the voltage control chip U1, and generate a feedback voltage returned to the first end (which can be understood as a feedback end) of the voltage control chip U1. The error amplifier inside the voltage control chip U1 compares the feedback voltage with the preset reference voltage. When the feedback voltage is greater than the reference voltage, the voltage control chip U1 will reduce the output voltage value. When the feedback voltage is less than the reference voltage, the voltage control chip U1 will increase the output voltage value, so as to realize the deep negative feedback control of the voltage control chip U1.
[0070] As an example, by adjusting the resistance value of the first resistor R1 and the resistance value of the third resistor R3, the feedback voltage can be kept greater than the reference voltage at all times, so that the second end of the voltage control chip U1 can always output a low voltage when the target key S1 is not pressed to be turned on because the feedback voltage is greater than the reference voltage.
[0071] In the above-mentioned key control circuit, if the voltage control chip U1 is a three-terminal adjustable reference voltage chip, it is usually epoxy resin or ceramic packaging, and the internal chip and pin are completely wrapped, so that water is difficult to penetrate into the inside. The reference voltage source inside the voltage control chip U1 is realized by a semiconductor device, and there is no mechanical contact, so the driving module 121 in the embodiment will not be affected by water.
[0072] If the second end of the voltage control chip U1 is to output a high voltage to turn on the switch module 122, so that the switch assembly 130 is turned on to supply power to the functional assembly 140, it is necessary to satisfy that the feedback voltage is less than the reference voltage. Even if the target key is leaking water, the water flow connects the two mechanical contacts of the target key to form an unintended conductive path, it is also difficult to satisfy that the feedback voltage received by the first end of the voltage control chip U1 is less than the reference voltage, so the key control circuit in the embodiment has high safety.
[0073] As shown in FIG. 1, Figure 4 In an embodiment, the driving module 121 further comprises a first capacitor C1 and a second capacitor C2;
[0074] One end of the first capacitor C1 is connected between the first resistor R1 and the first diode D1, and the other end of the first capacitor C1 is grounded;
[0075] One end of the second capacitor C2 is connected between the first resistor R1 and the first end of the voltage control chip U1, and the other end of the second capacitor C2 is grounded.
[0076] As shown in FIG. 1, Figure 5As shown, in one embodiment, the switching module 122 includes a transistor Q1, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, and a third capacitor C3.
[0077] The base of transistor Q1 is connected to the second terminal of the driving module 121 in series with the fourth resistor R4, the collector of transistor Q1 is connected to the first terminal of the switching assembly 130 in series with the fifth resistor R5, and the emitter of transistor Q1 is grounded.
[0078] The sixth resistor R6 and the third capacitor C3 are connected in parallel between the base and emitter of the transistor Q1, respectively.
[0079] For example, the base of transistor Q1 is connected to the second terminal of voltage control chip U1 by connecting the fourth resistor R4 in series.
[0080] like Figure 6 As shown, in one embodiment, the switching assembly 130 includes a field-effect transistor Q2, a seventh resistor R7, and a second diode D2;
[0081] The source of the field-effect transistor Q2 is connected to the external power supply VCC, the gate of the field-effect transistor Q2 is connected to the second terminal of the processing component 120, and the drain of the field-effect transistor Q2 is connected to the input terminal of the functional component 140.
[0082] The seventh resistor R7 and the second diode D2 are connected in parallel between the gate and source of the field-effect transistor Q2, respectively.
[0083] In this configuration, the positive terminal of the second diode D2 is connected to the gate of the field-effect transistor Q2, and the negative terminal of the second diode D2 is connected to the source of the field-effect transistor Q2.
[0084] For example, the gate of the field-effect transistor Q2 is connected to the collector of the transistor Q1 by a fifth resistor R5 in series.
[0085] like Figure 7 As shown, in one embodiment, the button control circuit 100 further includes a protection component 150, which is connected between the third terminal of the switch component 130 and the input terminal of the function component 140.
[0086] The protective component 150 is used to provide negative pressure protection to the switch component 130 when the switch component 130 stops supplying power to the functional component 140, so as to prevent the switch component 130 from burning out.
[0087] For example, the protection component 150 is connected between the drain of the field-effect transistor Q2 and the input of the functional component 140.
[0088] As Figure 8 shown, in one embodiment, the protection component 150 includes a third diode D3 and a fourth capacitor C4;
[0089] One end of the third diode D3 is connected between the third end of the switch component 130 and the input end of the function component 140, and the other end of the third diode D3 is grounded.
[0090] One end of the fourth capacitor C4 is connected between the third end of the switch component 130 and the input end of the function component 140, and the other end of the fourth capacitor C4 is grounded.
[0091] For example, one end of the third diode D3 is connected between the drain of the field effect tube Q2 and the input end of the function component 140.
[0092] In which, the positive pole of the third diode D3 is grounded, and the negative pole of the third diode D3 is between the third end of the switch component 130 and the input end of the function component 140.
[0093] For example, the function component 140 (such as a relay, a motor, a solenoid valve, a loudspeaker, etc.) is usually an inductive load, and its core feature is that there is inductance in the coil or winding. The characteristics of inductance are that the current cannot be suddenly changed and has the function of storing energy. When the current of the function component changes, the inductance will hinder this change through the self-induced electromotive force, and when the function component is powered on, the electromotive force can store the magnetic field energy, and when the power is off, the energy needs to be released.
[0094] Therefore, when the function component 140 is suddenly cut off, the inductance on the function component 140 will generate an electromotive force opposite in polarity to the original voltage, trying to maintain the current direction. At this time, the voltage of the function component 140 does not change due to the unchanged current direction, and the polarity of the electromotive force is reversed, which is negative to the original power supply, thereby forming a negative voltage value.
[0095] And the third diode D3 and the fourth capacitor C4 in the protection component 150 form an energy release path. The third diode D3 can be forward-biased when the inductance on the function component 140 forms a negative voltage value, thereby forming a low-impedance loop, so that the energy stored in the inductance can be slowly released through the third diode D3, and the reverse voltage of the inductance can be limited to the forward-biased voltage drop, avoiding the reverse voltage of the inductance from breaking down the field effect tube Q2 in the switch component 130.
[0096] And the fourth capacitor C4 can absorb part of the energy released by the inductance, slow down the voltage rising rate, reduce the peak amplitude of the reverse voltage of the inductance, and suppress high-frequency oscillation noise.
[0097] When the target key S1 is pressed and closed, the first end of the voltage control chip U1 is grounded, at this time, the feedback voltage received by the first end of the voltage control chip U1 is 0, the error amplifier inside the voltage control chip U1 compares the feedback voltage with the pre-set reference voltage, and it can be known that the feedback voltage is less than the reference voltage, so the voltage control chip U1 will increase the output voltage value, so that the voltage value output from the second end of the voltage control chip U1 to the switch module 122 is close to the voltage value of the external power supply VCC, at this time, the base of the triode Q1 in the switch module 122 is high level, the emitter is low level, the triode Q1 is turned on, so that the collector and the base of the triode Q1 are turned on, at this time, the gate of the field effect tube Q2 in the switch assembly 130 is consistent with the collector of the triode Q1, the voltage value of the gate of the field effect tube Q2 is pulled low, at this time, the field effect tube Q2 is turned on, and the field effect tube Q2 can output high current provided by the external power supply VCC to the functional assembly 140, thereby supplying power to the functional assembly 140.
[0098] When the target key S1 is released, the first end of the voltage control chip U1 receives the feedback voltage collected by the feedback network formed by the first resistor R1 and the third resistor R3, through the pre-set, it can be known that the feedback voltage collected by the feedback network formed by the first resistor R1 and the third resistor R3 is always greater than the reference voltage inside the voltage control chip U1, at this time, the second end of the voltage control chip U1 can be understood as the output voltage being reduced to 0V. At this time, the base of the triode Q1 in the switch module 122 is low level, the emitter is low level, the triode Q1 cannot be turned on, at this time, the gate of the field effect tube Q2 in the switch assembly 130 is consistent with the collector of the triode Q1, both are high level, the gate of the field effect tube Q2 keeps high voltage, at this time, the field effect tube Q2 cannot be turned on, and the field effect tube Q2 stops outputting high current provided by the external power supply VCC to the functional assembly 140.
[0099] At this time, the functional assembly 140 will form a negative voltage value, the third diode D3 in the protection assembly 150 can be forwardly turned on at this time, thereby forming a low impedance loop, so that the energy stored in the inductor can be slowly released through the third diode D3, and the reverse voltage of the inductor can be limited to the forward conduction voltage drop, avoiding the reverse voltage of the inductor from breaking through the field effect tube Q2 in the switch assembly 130; the fourth capacitor C4 simultaneously absorbs part of the energy released by the inductor, slows down the voltage rising rate, reduces the peak amplitude of the reverse voltage of the inductor, and suppresses high-frequency oscillation noise.
[0100] The embodiment of the application also provides a vehicle loaded with the key control circuit.
[0101] The division of the units is only logical function division, and actual implementation can have another division manner, for example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units or components shown or discussed can be indirect coupling or communication connection through some interfaces, devices or units, and can be electrical, mechanical or other forms.
[0102] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, that is, can be located in one place, or can be distributed on multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiment.
[0103] In addition, the functional units in each embodiment of the present application can be integrated in one processing unit, or each unit can be physically present alone, or two or more units can be integrated in one unit.
[0104] If the functions are realized in the form of software function units and sold or used as independent products, they can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the present application or the essential part or part of the technical solutions that make contributions to the prior art can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the embodiments of the present application. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk, and various program code storage media.
[0105] Those skilled in the art can understand that all or part of the steps of the above-mentioned method embodiments can be completed by program instruction related hardware. The aforementioned program can be stored in a computer readable storage medium. When the program is executed, the steps of the above-mentioned method embodiments are executed; and the aforementioned storage medium includes: ROM, RAM, magnetic disk or optical disk, and various program code storage media.
[0106] It should be understood that many variations can be made in the embodiments described and shown which should be considered within the scope of the present application. In particular, it is to be understood that while the use of the first and second electrode materials described herein are preferred, other electrode materials can be used. It is also to be understood that while the use of the first and second electrolyte materials described herein are preferred, other electrolyte materials can be used. It is also to be understood that while the use of the first and second separators described herein are preferred, other separators can be used. It is also to be understood that while the use of the first and second binders described herein are preferred, other binders can be used. It is also to be understood that while the use of the first and second solvents described herein are preferred, other solvents can be used. It is also to be understood that while the use of the first and second conductive additives described herein are preferred, other conductive additives can be used. It is also to be understood that while the use of the first and second lithium ion sources described herein are preferred, other lithium ion sources can be used. It is also to be understood that while the use of the first and second lithium ion sources described herein are preferred, other lithium ion sources can be used. It is also to be understood that while the use of the first and second lithium ion sources described herein are preferred, other lithium ion sources can be used. It
Claims
1. A button control circuit, characterized in that, It includes button control components, processing components, switch components, and function components; The output terminal of the button control component is connected to the first terminal of the processing component; the button control component is used to acquire the voltage value of the target button; The second end of the processing component is connected to the first end of the switching component and an external power supply; the processing component is used to take the voltage value output by the button control component as a sampled voltage value, and determine the voltage value output to the switching component based on the sampled voltage value and a preset reference voltage value. The second end of the switching assembly is connected to an external power source, and the third end of the switching assembly is connected to the input end of the functional component; the switching assembly is used to determine whether to supply power to the functional component based on the voltage value obtained from the processing component.
2. The button control circuit according to claim 1, characterized in that, The button control component includes the target button, one end of which is grounded and the other end of which is connected to the first end of the processing component.
3. The button control circuit according to claim 1, characterized in that, The processing components include a drive module and a switch module; The first end of the drive module is connected to the output end of the button control component, and the second end of the drive module is connected to the input end of the switch module and an external power supply. The output terminal of the switch module is connected to the first terminal of the switch assembly; The driving module is used to adjust the voltage value output to the switching module based on the voltage value received at the first terminal and the voltage value provided by the external power supply. The switching module is used to adjust the voltage value output to the switching component based on the voltage value received at the input terminal, so as to control the switching component to be turned on or off, thereby controlling whether the switching component supplies power to the functional component.
4. The button control circuit according to claim 3, characterized in that, The driving module includes a voltage control chip, a first diode, a first resistor, a second resistor, and a third resistor; The first terminal of the voltage control chip is connected to the output terminal of the button control component through series connection of the first resistor and the first diode. The second terminal of the voltage control chip is connected to an external power supply through series connection of the second resistor. The second terminal of the voltage control chip is also connected to the input terminal of the switch module. The third terminal of the voltage control chip is grounded. One end of the third resistor is connected to an external power source, and the other end is connected between the first resistor and the first diode.
5. The button control circuit according to claim 4, characterized in that, The drive module also includes a first capacitor and a second capacitor; One end of the first capacitor is connected between the first resistor and the first diode, and the other end of the first capacitor is grounded; One end of the second capacitor is connected between the first resistor and the first terminal of the voltage control chip, and the other end of the second capacitor is grounded.
6. The button control circuit according to claim 3, characterized in that, The switching module includes a transistor, a fourth resistor, a fifth resistor, a sixth resistor, and a third capacitor; The base of the transistor is connected to the second terminal of the driving module through the fourth resistor in series, the collector of the transistor is connected to the first terminal of the switching assembly through the fifth resistor in series, and the emitter of the transistor is grounded. The sixth resistor and the third capacitor are connected in parallel between the base and emitter of the transistor, respectively.
7. The button control circuit according to claim 3, characterized in that, The switching assembly includes a field-effect transistor, a seventh resistor, and a second diode; The source of the field-effect transistor is connected to an external power supply, the gate of the field-effect transistor is connected to the second terminal of the processing component, and the drain of the field-effect transistor is connected to the input terminal of the functional component. The seventh resistor and the second diode are connected in parallel between the gate and source of the field-effect transistor, respectively.
8. The button control circuit according to any one of claims 1-7, characterized in that, The button control circuit also includes a protection component, which is connected between the third terminal of the switch component and the input terminal of the function component. The protective component is used to provide negative voltage protection to the switch assembly when the switch assembly stops supplying power to the functional component, so as to prevent the switch assembly from burning out.
9. The key control circuit according to claim 8, characterized in that, The protective assembly includes a third diode and a fourth capacitor; One end of the third diode is connected between the third terminal of the switching assembly and the input terminal of the functional component, and the other end of the third diode is grounded. One end of the fourth capacitor is connected between the third terminal of the switching assembly and the input terminal of the functional component, and the other end of the fourth capacitor is grounded.
10. A vehicle, characterized in that, It is equipped with a button control circuit as described in any one of claims 1-9.