An emergency starting circuit and a handheld terminal thereof

Abstract

The utility model discloses an emergency starting circuit and handheld terminal thereof, the emergency starting circuit, include: the acquisition module is used for obtaining micro energy in the environment and is converted into electric energy, storage module is connected with the acquisition module electricity, is used for storing to the electric energy, processing module is connected with the storage module electricity, and the storage module gives the processing module power supply, wherein, the processing module includes: monitoring circuit and first control chip, monitoring circuit is configured as control storage module to the first control chip delivery electric energy to the first control chip enters the working mode. Through above -mentioned mode, when the car intelligence key is in the power shortage state, and monitoring circuit controls storage module to the first control chip delivery electric energy and makes it enter the working state to the car intelligence key's battery in the power shortage state, and the user still can start the vehicle in the keyless start mode.

Description

Technical Field

[0001] This utility model relates to the field of automotive smart key technology, and in particular to an emergency start circuit and its handheld terminal. Background Technology

[0002] A car smart key is a smart terminal that can unlock or unlock a car. It interacts with the vehicle to enable PKE (Passive Keyless Entry) and PKS (Passive Keyless Start). A keyless start system means that after entering the vehicle, the driver can start the engine without a traditional mechanical key. The driver can start the engine using a button on the dashboard or a button on the remote control. However, a car smart key requires an internal battery to power its radio frequency transmission module. When the battery in the car smart key is low, it will not be able to transmit radio frequency signals, and the user will not be able to start the car using the keyless start method. Summary of the Invention

[0003] The purpose of this utility model is to overcome the shortcomings of the prior art and provide an emergency start circuit and its handheld terminal to solve the technical problem that when the battery power in the car smart key is insufficient, the car smart key will not be able to send radio frequency signals, and the user will not be able to start the car by keyless start.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] In a first aspect, this utility model proposes an emergency start-up circuit, comprising: an acquisition module for acquiring micro-energy in the environment and converting it into electrical energy; a storage module electrically connected to the acquisition module for storing the electrical energy; and a processing module electrically connected to the storage module, wherein the storage module supplies power to the processing module; wherein the processing module comprises: a monitoring circuit and a first control chip, the monitoring circuit being configured to control the storage module to supply electrical energy to the first control chip, thereby causing the first control chip to enter a working mode.

[0006] In one specific embodiment, the storage module includes a rectifier circuit and a thirteenth capacitor. The input terminal of the rectifier circuit is electrically connected to the acquisition module, the output terminal of the rectifier circuit is electrically connected to the thirteenth capacitor, one end of the thirteenth capacitor is grounded, and the other end of the thirteenth capacitor is electrically connected to the first control chip.

[0007] In one specific embodiment, the acquisition module includes: a three-dimensional inductor and a filter resonant capacitor unit, wherein the output terminal of the three-dimensional inductor is electrically connected to the rectifier circuit, one end of the resonant capacitor unit is connected in parallel between the three-dimensional inductor and the rectifier circuit, and the other end of the resonant capacitor unit is grounded.

[0008] In one specific embodiment, the resonant capacitor unit includes: a first resonant capacitor circuit, a second resonant capacitor circuit, and a third resonant capacitor circuit. The Z-axis output terminal of the three-dimensional inductor is electrically connected to the rectifier circuit. One end of the first resonant capacitor circuit is connected in parallel between the Z-axis output terminal of the three-dimensional inductor and the rectifier circuit, and the other end of the first resonant capacitor circuit is grounded. The X-axis output terminal of the three-dimensional inductor is electrically connected to the rectifier circuit. One end of the second resonant capacitor circuit is connected in parallel between the X-axis output terminal of the three-dimensional inductor and the rectifier circuit, and the other end of the second resonant capacitor circuit is grounded. The Y-axis output terminal of the three-dimensional inductor is electrically connected to the rectifier circuit. One end of the third resonant capacitor circuit is connected in parallel between the Y-axis output terminal of the three-dimensional inductor and the rectifier circuit, and the other end of the third resonant capacitor circuit is grounded.

[0009] In one specific embodiment, the first resonant capacitor circuit, the second resonant capacitor circuit, and the third resonant capacitor circuit have the same structure. The first resonant capacitor circuit includes a first capacitor, a second capacitor, and a third capacitor. One end of the first capacitor, the second capacitor, and the third capacitor are all connected in parallel between the Y-axis output terminal of the three-dimensional inductor and the rectifier circuit. The other end of the first capacitor, the second capacitor, and the third capacitor are connected in parallel and then grounded.

[0010] In one specific embodiment, the monitoring circuit includes: a second control chip, a fourth diode, a first transistor, a second resistor, a second transistor, and a third resistor. The second control chip is connected in parallel with the output terminal of the rectifier circuit. One end of the fourth diode is electrically connected to the second control chip, and the other end of the fourth diode is electrically connected to the gate of the first transistor. The source of the first transistor is grounded. One end of the second resistor is electrically connected to the drain of the first transistor, and the other end of the second resistor is electrically connected to the third resistor and the gate of the second transistor. The source of the second transistor is connected in parallel with the thirteenth capacitor and the third resistor. The drain of the second transistor is electrically connected to the first control chip.

[0011] In one specific embodiment, the processing module further includes a protection circuit, the input terminal of which is connected in parallel with the output terminal of the rectifier circuit.

[0012] In one specific embodiment, the protection circuit includes: a third control chip, a first resistor, and an eleventh capacitor. The third control chip is connected in parallel with the output terminal of the rectifier circuit. One end of the eleventh capacitor is electrically connected to the third control chip, and the other end of the eleventh capacitor is grounded. One end of the first resistor is connected between the third control chip and the eleventh capacitor, and the other end of the first resistor is connected in parallel with the ground terminal of the eleventh capacitor.

[0013] In one specific embodiment, the rectifier circuit further includes a tenth capacitor, one end of which is grounded and the other end of which is connected between the protection circuit and the monitoring circuit.

[0014] Secondly, this utility model proposes a handheld terminal, including: the emergency start circuit as described above.

[0015] The beneficial effects of this utility model are:

[0016] Compared with the prior art, the emergency start circuit of this utility model, when the car smart key is in a low-power state, the monitoring circuit controls the storage module to supply power to the first control chip to enable it to enter the working state, so that the user can still start the vehicle in the keyless start mode even when the car smart key battery is low-powered.

[0017] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model, it can be implemented according to the contents of the specification. In order to make the above and other objects, features and advantages of this utility model more obvious and easy to understand, the following are preferred embodiments, which are described in detail below. Attached Figure Description

[0018] Figure 1 is a structural block diagram of an emergency start circuit proposed in an embodiment of this utility model;

[0019] Figure 2 A circuit diagram of an emergency start circuit proposed in an embodiment of this utility model;

[0020] Figure 3 This is a schematic block diagram of a handheld terminal proposed in an embodiment of the present utility model.

[0021] Explanation of reference numerals in the attached figures:

[0022] 10. Acquisition module; 20. Storage module; 30. Processing module. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0025] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "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 accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0027] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. The illustrative expressions of the above terms in this specification should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification. Example

[0030] Firstly, please refer to Figures 1 to 2 This utility model embodiment proposes an emergency start-up circuit, including: an acquisition module 10 for acquiring micro-energy in the environment and converting it into electrical energy; a storage module 20 electrically connected to the acquisition module 10 for storing electrical energy; and a processing module 30 electrically connected to the storage module 20, wherein the storage module 20 supplies power to the processing module 30; wherein the processing module 30 includes: a monitoring circuit and a first control chip U1, wherein the monitoring circuit is configured to control the storage module to supply electrical energy to the first control chip U1, so that the first control chip enters a working mode.

[0031] Specifically, the acquisition module 10 is used to acquire micro-energy (radio frequency signal) in the environment and convert it into electrical energy using electromagnetic induction; the storage module 20 is electrically connected to the acquisition module 10 and its function is to store the electrical energy converted by the acquisition module 10; the monitoring circuit in the processing module 30 monitors the electrical energy status in the storage module 20 and the power status of the car smart key battery in real time. When the car smart key battery is detected to be in a low-power state, the monitoring circuit will control the electrical energy in the storage module 20 to be delivered to the first control chip U1. After the first control chip U1 acquires the electrical energy, it starts to work and issues corresponding control signals according to the preset program and logic, so that the user can start the vehicle when the car smart key battery is in a low-power state.

[0032] In practical applications, the emergency start circuit is used in car smart keys. During normal use of the car smart key, the emergency start circuit is in standby mode. When the car smart key battery is low on power, the acquisition module 10 continuously collects micro-energy from the environment and converts it into electrical energy. The storage module 20 stores this electrical energy to maintain a certain power reserve. When the monitoring circuit in the processing module 30 detects that the car smart key battery voltage is lower than a set threshold, i.e., it is in a low-power state, it will immediately trigger the control mechanism. According to the instructions of the monitoring circuit, the storage module 20 supplies electrical energy to the first control chip U1, enabling the first control chip U1 to enter the working state, allowing the user to start the vehicle when the car smart key battery is low on power.

[0033] The emergency start circuit proposed in this embodiment, when the car smart key is in a low-power state, the monitoring circuit controls the storage module to supply power to the first control chip U1 to enable it to enter the working state, so that even when the car smart key battery is low-powered, the user can still start the vehicle in a keyless start mode.

[0034] Please see Figure 2 The storage module 20 includes a rectifier circuit and a thirteenth capacitor C13. The input terminal of the rectifier circuit is electrically connected to the acquisition module 10, and the output terminal of the rectifier circuit is electrically connected to the thirteenth capacitor C13. One end of the thirteenth capacitor C13 is grounded, and the other end of the thirteenth capacitor C13 is electrically connected to the first control chip U1.

[0035] Specifically, the input terminal of the rectifier circuit is electrically connected to the acquisition module 10, receiving the AC power converted by the acquisition module 10 and converting it into DC power. The rectified DC power still exhibits some fluctuations and ripple. The thirteenth capacitor C13 serves as a filter and energy storage unit; one end is electrically connected to the output terminal of the rectifier circuit, and the other end is grounded. When current flows, the thirteenth capacitor C13 charges and stores electrical energy. When the voltage drops, the capacitor discharges, releasing the stored energy so that the first control chip U1 can enter the working state. Preferably, in this embodiment, the thirteenth capacitor C13 is a tantalum capacitor. Tantalum capacitors have advantages such as large capacity, small size, and stable performance, enabling efficient storage and release of electrical energy, ensuring stable operation of the car smart key when the battery is low.

[0036] In this embodiment, the rectifier circuit includes a first diode D1, a second diode D2, and a third diode D3. The input terminals of the first diode D1, the second diode D2, and the third diode D3 are electrically connected to the acquisition module 10, respectively. The output terminals of the first diode D1, the second diode D2, and the third diode D3 are connected in parallel and then electrically connected to the thirteenth capacitor C13. The diodes have unidirectional conductivity and play a rectifier role in the process of converting AC power to DC power, converting the AC micro-energy signal acquired by the acquisition module 10 into DC power. The parallel connection of the first diode D1, the second diode D2, and the third diode D3 improves the rectification efficiency, allowing more micro-energy to be converted into usable DC power, thereby improving the charging efficiency of the thirteenth capacitor C13.

[0037] In one embodiment, the storage module 20 further includes a fourteenth capacitor C14, one end of which is connected between the rectifier circuit and the fourteenth capacitor C14, and the other end of which is grounded. The thirteenth capacitor C13 and the fourteenth capacitor C14 are connected in parallel to the output terminal of the rectifier circuit. When the rectifier circuit converts the AC micro-energy acquired by the acquisition module 10 into DC power, the thirteenth capacitor C13 and the fourteenth capacitor C14 store electrical energy, increasing the total capacitance value of the storage module 20, which can store more electrical energy, thereby providing the stable voltage required for the operation of the first control chip U1. At the same time, one end of the fourteenth capacitor C14 is connected between the rectifier circuit and the thirteenth capacitor C13, and the other end is grounded, forming a low-pass filter to filter out high-frequency ripple and noise in the rectified DC power, improving the quality of electrical energy and making the output voltage smoother and purer.

[0038] Please refer to it again. Figure 2 The acquisition module 10 includes a three-dimensional inductor L1 and a resonant capacitor unit. The output terminal of the three-dimensional inductor L1 is electrically connected to the rectifier circuit. One end of the resonant capacitor unit is connected in parallel between the three-dimensional inductor L1 and the rectifier circuit, and the other end of the resonant capacitor unit is grounded.

[0039] Specifically, the three-dimensional inductor L1 is composed of multiple layers of coils interwoven in three-dimensional space. Its structure allows the coils to effectively cut electromagnetic waves in the environment from different directions, thereby generating an induced electromotive force in the inductor. The alternating electromagnetic field in the environment induces an alternating current in the coils of the three-dimensional inductor L1 through changes in magnetic flux, achieving a preliminary conversion of electromagnetic energy into electrical energy. The resonant capacitor unit and the three-dimensional inductor L1 form a parallel resonant circuit. When the frequency of the input signal approaches the resonant frequency of this circuit, resonance occurs. At this point, the energy exchange efficiency between the inductor and capacitor is highest, effectively selecting and amplifying the input signal. The electrical energy processed by the resonant capacitor unit is transmitted to the input of the rectifier circuit. The rectifier circuit converts the input AC micro-energy into DC electrical energy and delivers it to the thirteenth capacitor C13. Because the electrical energy processed by the resonant capacitor unit matches the input requirements of the rectifier circuit, the thirteenth capacitor C13 can accumulate sufficient electrical energy more quickly, shortening the preparation time for emergency startup.

[0040] Please refer to it again. Figure 2 The resonant capacitor unit includes: a first resonant capacitor circuit, a second resonant capacitor circuit, and a third resonant capacitor circuit. The Z-axis output terminal of the three-dimensional inductor L1 is electrically connected to the rectifier circuit. One end of the first resonant capacitor circuit is connected in parallel between the Z-axis output terminal of the three-dimensional inductor L1 and the rectifier circuit, and the other end of the first resonant capacitor circuit is grounded. The X-axis output terminal of the three-dimensional inductor L1 is electrically connected to the rectifier circuit. One end of the second resonant capacitor circuit is connected in parallel between the X-axis output terminal of the three-dimensional inductor L1 and the rectifier circuit, and the other end of the second resonant capacitor circuit is grounded. The Y-axis output terminal of the three-dimensional inductor L1 is electrically connected to the rectifier circuit. One end of the third resonant capacitor circuit is connected in parallel between the Y-axis output terminal of the three-dimensional inductor L1 and the rectifier circuit, and the other end of the third resonant capacitor circuit is grounded.

[0041] Specifically, the three-dimensional inductor L1 can sense electromagnetic energy in different directions. By setting resonant capacitor circuits corresponding to the Z-axis, X-axis, and Y-axis respectively, each resonant capacitor circuit and the corresponding axial coil of the three-dimensional inductor L1 form a parallel LC resonant circuit. When the frequency of the input signal is close to the resonant frequency of the parallel LC resonant circuit, the parallel LC resonant circuit generates resonance, thus selecting and amplifying the input signal. In this way, each resonant capacitor circuit can select and amplify energy within a specific frequency range, enabling the acquisition module 10 to have high energy harvesting efficiency within that specific frequency range, thereby shortening the charging time of the thirteenth capacitor C13.

[0042] Please refer to it again. Figure 2The first resonant capacitor circuit, the second resonant capacitor circuit, and the third resonant capacitor circuit have the same structure. The first resonant capacitor circuit includes: a first capacitor C1, a second capacitor C2, and a third capacitor C3. One end of the first capacitor C1, the second capacitor C2, and the third capacitor C3 are all connected in parallel between the Z-axis output terminal of the three-dimensional inductor L1 and the rectifier circuit. The other end of the first capacitor C1, the second capacitor C2, and the third capacitor C3 are connected in parallel and then grounded.

[0043] Specifically, one end of the fourth capacitor C4, the fifth capacitor C5, and the sixth capacitor C6 of the second resonant capacitor circuit are all connected in parallel between the X-axis output terminal of the three-dimensional inductor L1 and the wake-up unit, and the other end of the fourth capacitor C4, the fifth capacitor C5, and the sixth capacitor C6 are connected in parallel and then grounded. One end of the seventh capacitor C7, the eighth capacitor C8, and the ninth capacitor C9 of the third resonant capacitor circuit are all connected in parallel between the Y-axis output terminal of the three-dimensional inductor L1 and the wake-up unit, and the other end of the seventh capacitor C7, the eighth capacitor C8, and the ninth capacitor C9 are connected in parallel and then grounded.

[0044] It is understandable that one end of each of the first capacitor C1, the second capacitor C2, and the third capacitor C3 is connected in parallel between the Z-axis output of the three-dimensional inductor L1 and the wake-up unit, while the other end is connected in parallel to ground, forming multiple resonant paths. When a low-frequency signal is input, signals of different frequencies will resonate on different capacitor paths, thereby achieving the selection and filtering of specific frequency signals. Furthermore, the first resonant capacitor circuit, composed of multiple capacitors connected in parallel, improves the transmission efficiency of the energy induced by the three-dimensional inductor L1 to the rectifier circuit.

[0045] Please refer to it again. Figure 2 The monitoring circuit includes: a second control chip U2, a fourth diode D4, a first transistor Q1, a second resistor R2, a second transistor Q2, and a third resistor R3. The second control chip U2 is connected in parallel with the output terminal of the rectifier circuit. One end of the fourth diode D4 is electrically connected to the second control chip U2, and the other end of the fourth diode D4 is electrically connected to the gate of the first transistor Q1. The source of the first transistor Q1 is grounded. One end of the second resistor R2 is electrically connected to the drain of the first transistor Q1, and the other end of the second resistor R2 is electrically connected to the gate of the second transistor Q2 and the third resistor R3. The source of the second transistor Q2 is connected in parallel with the thirteenth capacitor C13 and the third resistor R3. The drain of the second transistor Q2 is electrically connected to the first control chip U1.

[0046] Specifically, the VSS terminal of the second control chip U2 is grounded to form a stable reference potential, reducing the impact of external interference on the monitoring signal. The IN terminal of the second control chip U2 is connected in parallel with the output terminal of the rectifier circuit to monitor the rectified DC power. One end of the fourth diode D4 is electrically connected to the OUT terminal of the second control chip U2. The VSS terminal of the second control chip U2 is grounded to ensure that the signal input to the first transistor Q1 is a unidirectional conduction signal, preventing reverse current flow from damaging the second control chip U2. The first transistor Q1 acts as a switching element, with its source grounded and its drain connected to the gate of the second transistor Q2 through the second resistor R2. When the power monitored by the second control chip U2 reaches the set threshold, the OUT terminal of the second control chip U2 outputs a control signal, which turns on the first transistor Q1 through the fourth diode D4. At this time, current flows through the second resistor R2 to the gate of the second transistor Q2, forming a stable gate voltage. The source of the second transistor Q2 is connected in parallel with the thirteenth capacitor C13, and is connected to the gate of the second transistor Q2 through the third resistor R3, forming a feedback network to control the conduction state of the second transistor Q2. When the second transistor Q2 is turned on, electrical energy is transferred from the thirteenth capacitor C13 through the drain of the second transistor Q2 to the first control chip U1, so that the first control chip U1 enters the working state. The cooperation of the fourth diode D4 and the third resistor R3 prevents reverse current flow and reduces voltage fluctuations, improving the stability of the emergency start circuit. The third resistor R3 forms a voltage divider between the gate and source of the second transistor Q2 to stabilize the gate voltage of the second transistor Q2, improving the stability and anti-interference capability of the circuit.

[0047] In practical applications, the IN terminal of the second control chip U2 monitors the DC power output of the rectifier circuit in real time, while the VSS terminal is grounded to maintain circuit stability. When the monitored power reaches a set threshold, the OUT terminal of the second control chip U2 outputs a control signal, which sends a conduction signal to the gate of the first transistor Q1 through the fourth diode D4. After the first transistor Q1 is turned on, the current flows through the second resistor R2 to the gate of the second transistor Q2, forming a stable gate voltage. Under the action of the gate voltage, the second transistor Q2 is turned on, and the power is transferred from the thirteenth capacitor C13 through the drain of the second transistor Q2 to the first control chip U1. At the same time, the third resistor R3 stabilizes the gate voltage of the second transistor Q2, ensuring the stability of its conduction state and guaranteeing the continuous and stable transmission of power to the first control chip U1.

[0048] Please refer to it again. Figure 2 The processing module 30 also includes a protection circuit, the input of which is connected in parallel with the output of the rectifier circuit.

[0049] Specifically, when the rectifier circuit is outputting power normally and the voltage, current and other parameters are within the set range, the protection circuit is in monitoring mode and monitors the power in real time. When the voltage output by the rectifier circuit exceeds the threshold set by the protection circuit, the protection circuit releases the overvoltage to ground, thereby limiting the output voltage within a safe range and preventing excessive voltage from damaging the thirteenth capacitor C13.

[0050] Please refer to it again. Figure 2 The protection circuit includes: a third control chip U3, a first resistor R1, and an eleventh capacitor C11. The third control chip U3 is connected in parallel with the output terminal of the rectifier circuit. One end of the eleventh capacitor C11 is electrically connected to the third control chip U3, and the other end of the eleventh capacitor C11 is grounded. One end of the first resistor R1 is connected between the third control chip U3 and the eleventh capacitor C11, and the other end of the first resistor R1 is connected in parallel with the ground terminal of the eleventh capacitor C11.

[0051] Specifically, the IN terminal of the third control chip U3 is connected in parallel with the output terminal of the rectifier circuit to monitor the output voltage of the rectifier circuit in real time. The VSS terminal of the third control chip U3 is grounded, forming a low-impedance path. When the output voltage exceeds a preset threshold, the excess voltage is guided to the VSS terminal of the third control chip U3 to be released to ground. The OUT terminal of the third control chip U3 is electrically connected to the eleventh capacitor C11, which plays a role in filtering and smoothing the voltage, reducing the impact of transient overvoltage on the third control chip U3. The first resistor R1 is connected between the chip and the capacitor to limit the discharge current and prevent excessive current from damaging the eleventh capacitor C11.

[0052] Please refer to it again. Figure 2 The rectifier circuit also includes: a tenth capacitor C10, one end of which is grounded and the other end of which is connected between the protection circuit and the monitoring circuit.

[0053] Specifically, based on the capacitive reactance characteristics of capacitors to AC signals and their isolation characteristics to DC signals, when there is ripple and noise in the DC output of the rectifier circuit, the tenth capacitor C10 provides a low-impedance path to ground, thereby reducing the impact of ripple and noise on subsequent circuits.

[0054] Secondly, please refer to Figure 3 This utility model proposes a handheld terminal, including: the emergency start circuit as described above.

[0055] Specifically, the emergency start circuit is applied to handheld terminals, so the beneficial effects of the handheld terminal are the same as those of the emergency start circuit.

[0056] Compared with the prior art, the emergency start circuit proposed in this utility model, when the car smart key is in a low-power state, the monitoring circuit controls the storage module to supply power to the first control chip U1 to enable it to enter the working state, so that the user can still start the vehicle in the keyless start mode even when the car smart key battery is low-powered.

[0057] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. An emergency start circuit, characterized in that, include: The acquisition module is used to acquire micro-energy in the environment and convert it into electrical energy; A storage module, electrically connected to the acquisition module, is used to store the electrical energy; The processing module is electrically connected to the storage module, and the storage module supplies power to the processing module. The processing module includes a monitoring circuit and a first control chip. The monitoring circuit is configured to control the storage module to supply power to the first control chip, so that the first control chip enters a working mode.

2. The emergency start circuit according to claim 1, characterized in that, The storage module includes a rectifier circuit and a thirteenth capacitor. The input terminal of the rectifier circuit is electrically connected to the acquisition module, the output terminal of the rectifier circuit is electrically connected to the thirteenth capacitor, one end of the thirteenth capacitor is grounded, and the other end of the thirteenth capacitor is electrically connected to the first control chip.

3. The emergency start circuit according to claim 2, characterized in that, The acquisition module includes a three-dimensional inductor and a filter resonant capacitor unit. The output terminal of the three-dimensional inductor is electrically connected to the rectifier circuit. One end of the resonant capacitor unit is connected in parallel between the three-dimensional inductor and the rectifier circuit, and the other end of the resonant capacitor unit is grounded.

4. The emergency start circuit according to claim 3, characterized in that, The resonant capacitor unit includes a first resonant capacitor circuit, a second resonant capacitor circuit, and a third resonant capacitor circuit. The Z-axis output terminal of the three-dimensional inductor is electrically connected to the rectifier circuit. One end of the first resonant capacitor circuit is connected in parallel between the Z-axis output terminal of the three-dimensional inductor and the rectifier circuit, and the other end of the first resonant capacitor circuit is grounded. The X-axis output terminal of the three-dimensional inductor is electrically connected to the rectifier circuit. One end of the second resonant capacitor circuit is connected in parallel between the X-axis output terminal of the three-dimensional inductor and the rectifier circuit, and the other end of the second resonant capacitor circuit is grounded. The Y-axis output terminal of the three-dimensional inductor is electrically connected to the rectifier circuit. One end of the third resonant capacitor circuit is connected in parallel between the Y-axis output terminal of the three-dimensional inductor and the rectifier circuit, and the other end of the third resonant capacitor circuit is grounded.

5. The emergency start circuit according to claim 4, characterized in that, The first resonant capacitor circuit, the second resonant capacitor circuit, and the third resonant capacitor circuit have the same structure. The first resonant capacitor circuit includes a first capacitor, a second capacitor, and a third capacitor. One end of the first capacitor, the second capacitor, and the third capacitor are all connected in parallel between the Y-axis output terminal of the three-dimensional inductor and the rectifier circuit. The other end of the first capacitor, the second capacitor, and the third capacitor are connected in parallel and then grounded.

6. The emergency start circuit according to claim 2, characterized in that, The monitoring circuit includes: a second control chip, a fourth diode, a first transistor, a second resistor, a second transistor, and a third resistor. The second control chip is connected in parallel with the output terminal of the rectifier circuit. One end of the fourth diode is electrically connected to the second control chip, and the other end of the fourth diode is electrically connected to the gate of the first transistor. The source of the first transistor is grounded. One end of the second resistor is electrically connected to the drain of the first transistor, and the other end of each of the second resistors is electrically connected to the third resistor and the gate of the second transistor. The source of each of the second transistors is connected in parallel with the thirteenth capacitor and the third resistor. The drain of the second transistor is electrically connected to the first control chip.

7. The emergency start circuit according to claim 2, characterized in that, The processing module further includes a protection circuit, the input of which is connected in parallel with the output of the rectifier circuit.

8. The emergency start circuit according to claim 7, characterized in that, The protection circuit includes a third control chip, a first resistor, and an eleventh capacitor. The third control chip is connected in parallel with the output terminal of the rectifier circuit. One end of the eleventh capacitor is electrically connected to the third control chip, and the other end of the eleventh capacitor is grounded. One end of the first resistor is connected between the third control chip and the eleventh capacitor, and the other end of the first resistor is connected in parallel with the ground terminal of the eleventh capacitor.

9. The emergency start circuit according to claim 7, characterized in that, include: The rectifier circuit further includes a tenth capacitor, one end of which is grounded and the other end of which is connected between the protection circuit and the monitoring circuit.

10. A handheld terminal, characterized in that, include: The emergency start circuit according to any one of claims 1 to 9.

Images