Emergency starting circuit, vehicle and electronic equipment

Abstract

The invention relates to an emergency starting circuit, a vehicle and electronic equipment, the emergency starting circuit comprises a first power distribution module, a second power distribution module and a third power distribution module, when an external power supply is connected, the first power distribution module converts a first direct current voltage into a second direct current voltage; the second power distribution module provides a first direct-current voltage and converts the first direct-current voltage into a third direct-current voltage according to the second direct-current voltage, the third power distribution module takes the third direct-current voltage as an emergency starting voltage, and the second power distribution module can be triggered through an external power supply to provide the first direct-current voltage for the first power distribution module. The first power distribution module supplies power to the third power distribution module through the second power distribution module, so that no matter whether the third power distribution module is in an insufficient-power state or a non-power state, emergency starting voltage can be provided, emergency starting of the vehicle is further achieved, adaptability of emergency starting is improved, the requirement for an external power source is lowered, and the service life of the vehicle is prolonged. And the convenience of emergency starting is improved.

Description

Technical Field

[0001] This application relates to the field of electronic technologies, and in particular, to an emergency start-up circuit, a vehicle, and an electronic device. Background Art

[0002] During the use of a vehicle, due to some factors, the vehicle's battery may be in a discharged state, which may then cause the vehicle to fail to start normally.

[0003] The discharged state of the battery can be divided into an insufficient state and a power-off state. In the insufficient state, the vehicle's emergency start-up can be achieved by relying on the remaining electrical energy of the battery, while in the power-off state, the vehicle's emergency start-up cannot be achieved, which brings a lot of inconvenience to the use of the vehicle. Summary of the Invention

[0004] Embodiments of this application provide an emergency start-up circuit, a vehicle, and an electronic device, which improve the applicability of the emergency start-up circuit to at least partially solve the above technical problems.

[0005] To achieve the above object, according to the first aspect of this application, an emergency start-up circuit is provided. The emergency start-up circuit includes a first power distribution module, a second power distribution module, and a third power distribution module. The first power distribution module is configured to convert a first DC voltage into a second DC voltage when connected to an external power source; the second power distribution module is connected to the first power distribution module, and the second power distribution module is configured to provide the first DC voltage and convert the first DC voltage into a third DC voltage according to the second DC voltage; the third power distribution module is connected to the second power distribution module, and the third power distribution module is configured to use the third DC voltage as the emergency start-up voltage.

[0006] According to the second aspect of this application, a vehicle is further provided. The vehicle includes the above-mentioned emergency start-up circuit.

[0007] According to the third aspect of this application, an electronic device is further provided. The electronic device includes the above-mentioned emergency start-up circuit or vehicle.

[0008] The emergency start-up circuit, vehicle, and electronic device according to the embodiments of the present application convert a first DC voltage into a second DC voltage by a first power distribution module when an external power source is connected. The second power distribution module provides the first DC voltage and converts the first DC voltage into a third DC voltage according to the second DC voltage. The third power distribution module uses the third DC voltage as the emergency start-up voltage. The second power distribution module can be triggered by the external power source to provide the first DC voltage to the first power distribution module, so that the first power distribution module supplies power to the third power distribution module through the second power distribution module. Thus, regardless of whether the third power distribution module is in a power-deficient state or a power-off state, an emergency start-up voltage can be provided, thereby realizing the emergency start-up of the vehicle. This not only improves the adaptability of the emergency start-up, but also reduces the requirements for the external power source and improves the convenience of the emergency start-up.

[0009] Other features and advantages of the present application will be described in detail in the following specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative efforts.

[0011] In order to more fully understand the present application and its beneficial effects, the following will be described in conjunction with the drawings, where the same reference numerals represent the same parts in the following description.

[0012] Figure 1 is a schematic block diagram of the emergency start-up circuit provided in an exemplary embodiment of the present disclosure;

[0013] Figure 2 is a first schematic block diagram of the first power distribution module provided in an exemplary embodiment of the present disclosure;

[0014] ]> Figure 3 is a circuit schematic diagram of the switch unit provided in an exemplary embodiment of the present disclosure;

[0015] Figure 4 is a second schematic block diagram of the first power distribution module provided in an exemplary embodiment of the present disclosure;

[0016] Figure 5 [[ID=·31]]is a third schematic block diagram of the first power distribution module provided in an exemplary embodiment of the present disclosure;

[0017] Figure 6 is a fourth schematic block diagram of the first power distribution module provided in an exemplary embodiment of the present disclosure;

[0018] Figure 7 It is the fifth schematic block diagram of the first power distribution module provided in the exemplary embodiments of the present disclosure;

[0019] Figure 8 It is the schematic block diagram of the second power distribution module provided in the exemplary embodiments of the present disclosure;

[0020] Figure 9 It is the schematic block diagram of the third power distribution module provided in the exemplary embodiments of the present disclosure;

[0021] Figure 10 It is the schematic block diagram of the external power supply provided in the exemplary embodiments of the present disclosure;

[0022] Figure 11 It is the working flowchart of the emergency start-up circuit provided in the exemplary embodiments of the present disclosure;

[0023] Figure 12 It is the structural diagram of the vehicle provided in the exemplary embodiments of the present disclosure;

[0024] Figure 13 It is the structural diagram of the electronic device provided in the exemplary embodiments of the present disclosure.

[0025] Description of reference numerals:

[0026] 10. First power distribution module; 11. Power isolation unit; 12. Switch unit; 13. DC step-down unit; 14. DC boost unit; 15. Energy storage capacitor; 16. Rectification unit; M1. Insulated gate bipolar transistor; TVS. Transient voltage suppressor;

[0027] 20. Second power distribution module; 21. DC conversion unit; 22. High-voltage pre-charge unit; PA1. Power battery; BMS. Battery management unit;

[0028] 30. Third power distribution module; 31. Storage battery; 32. Load; GND. Ground terminal;

[0029] 100. Emergency start-up circuit;

[0030] 101. External power supply; AC. Alternating current power supply; DC. Direct current power supply;

[0031] 200. Vehicle;

[0032] 300. Electronic device. Detailed implementation manners

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0034] An emergency start-up circuit 100 is provided in an embodiment of the present application. Refer to Figures 1 to 11 , as Figure 1 shown. The emergency start-up circuit 100 includes a first power distribution module 10, a second power distribution module 20, and a third power distribution module 30. The first power distribution module 10 is configured to convert a first DC voltage into a second DC voltage when connected to an external power supply 101; the second power distribution module 20 is connected to the first power distribution module 10 and is configured to provide the first DC voltage and convert the first DC voltage into a third DC voltage according to the second DC voltage; the third power distribution module 30 is connected to the second power distribution module 20 and is configured to convert the third DC voltage into an emergency start-up voltage.

[0035] It can be understood that for the emergency start-up circuit 100 in the embodiment of the present application, when connected to the external power supply 101, the first power distribution module 10 converts the first DC voltage into the second DC voltage, the second power distribution module 20 provides the first DC voltage and converts the first DC voltage into the third DC voltage according to the second DC voltage, and the third power distribution module 30 uses the third DC voltage as the emergency start-up voltage. The second power distribution module 20 can be triggered by the external power supply 101 to provide the first DC voltage for the first power distribution module 10, so that the first power distribution module 10 supplies power to the third power distribution module 30 through the second power distribution module 20. Thus, regardless of whether the third power distribution module 30 is in a power-deficient state or a power-off state, an emergency start-up voltage can be provided, thereby realizing the emergency start-up of the vehicle 200. This not only improves the adaptability of the emergency start-up, but also reduces the requirements for the external power supply 101 and improves the convenience of the emergency start-up.

[0036] It should be noted that the external power supply 101 serves as the trigger source of the emergency start circuit 100. When the emergency start circuit 100 is connected to the external power supply 101, the emergency start circuit 100 enters the emergency start mode and can be activated and automatically run until the emergency start of the vehicle 200 is achieved; when the emergency start circuit 100 disconnects from the external power supply 101, the emergency start circuit 100 automatically controls the second power distribution module 20 to stop providing the first DC voltage to the first power supply module, so that the emergency start circuit 100 automatically exits the emergency start mode. Since the external power supply 101 is used as a control signal rather than a power supply, each embodiment of the present application can reduce the usage requirements for the external power supply 101, thereby improving the convenience of emergency start. The emergency start voltage can be but is not limited to being used for the emergency start of the vehicle 200, and can also be other devices suitable for emergency start.

[0037] In some embodiments, such as Figure 2 shown, the first power distribution module 10 includes a power isolation unit 11, a switch unit 12, and a DC step-down unit 13. The power isolation unit 11 is configured to isolate the external power supply 101 from the emergency start circuit 100; the switch unit 12 is connected to the power isolation unit 11 and the second power distribution module 20, and the switch unit 12 is configured to control the second power distribution module 20 to provide the first DC voltage to the first power distribution module 10 according to the output voltage of the power isolation unit 11; the DC step-down unit 13 is connected to the switch unit 12 and the second power distribution module 20, and the DC step-down unit 13 is configured to convert the first DC voltage into a second DC voltage.

[0038] It should be noted that the power isolation unit 11 can be a power isolation circuit, which can play an electrical isolation role between the external power supply 101 and the switch unit 12. In this embodiment, when the input end of the power isolation unit 11 is connected to the external power supply 101, the output voltage of the power isolation unit 11 can control the switch unit 12 to conduct, so that the first DC voltage provided by the second power distribution module 20 can be transmitted to the input end of the DC step-down unit 13. Only in this way can the DC step-down unit 13 output the second DC voltage, and the second power distribution module 20 also needs to be powered by the second DC voltage to output the third DC voltage.

[0039] When the input end of the power isolation unit 11 is not connected to the external power supply 101, the output voltage of the power isolation unit 11 controls the switch unit 12 to disconnect, and the input end of the DC step-down unit 13 cannot receive the first DC voltage provided by the second power distribution module 20. In this way, the DC step-down unit 13 cannot output the second DC voltage either.

[0040] Optionally, such as Figure 3As shown, the switching unit 12 includes an insulated gate bipolar transistor M1. The first pole of the insulated gate bipolar transistor M1 is connected to the first output terminal of the power isolation unit 11 and the first output terminal of the second power distribution module 20. The gate of the insulated gate bipolar transistor M1 is connected to the second output terminal of the power isolation unit 11. The second pole of the insulated gate bipolar transistor M1 is connected to the first input terminal of the DC buck unit 13.

[0041] It should be noted that the first pole can be one of the source and the drain, and the second pole is the other of the source and the drain. For example, when the first pole is the source, the second pole is the drain; or when the first pole is the drain, the second pole is the source. The first output terminal and the second output terminal of the power isolation unit 11 are used to transmit the DC output voltage of the power isolation unit 11. Through the connection relationship of this embodiment, the DC output voltage of the power isolation unit 11 is beneficial to improving the driving ability of the insulated gate bipolar transistor M1, so that the insulated gate bipolar transistor M1 can be controlled to conduct with a lower DC output voltage.

[0042] In other embodiments, the switching unit 12 can also adopt a metal-oxide-semiconductor field-effect transistor (MOSFET) or a bipolar junction transistor (BJT).

[0043] Optionally, as Figure 4 shown, the first power distribution module 10 further includes a DC boost unit 14. The input terminal of the DC boost unit 14 is connected to the output terminal of the power isolation unit 11. The first output terminal of the DC boost unit 14 is connected to the control terminal of the switching unit 12. The second output terminal of the DC boost unit 14 is connected to the first output terminal of the second power distribution module 20 and the first terminal of the switching unit 12.

[0044] It should be noted that the DC boost unit 14 is used to boost the DC output voltage of the power isolation unit 11 to ensure that even when the voltage provided by the external power supply 101 is low, it can ensure that the switching unit 12 can be controlled to conduct, so as to control the first DC voltage to be transmitted to the first power distribution module 10.

[0045] Optionally, as Figure 5 shown, the first power distribution module 10 further includes a storage capacitor 15. The positive electrode of the storage capacitor 15 is connected to the first output terminal of the DC boost unit 14 and the control terminal of the switching unit 12. The negative electrode of the storage capacitor 15 is connected to the first output terminal of the second power distribution module 20 and the first terminal of the switching unit 12.

[0046] It should be noted that the energy storage capacitor 15 can improve the stability of the power supply voltage when the output voltage provided by the external power supply 101 is unstable, so as to improve the control stability of the switching unit 12. At the same time, the energy storage capacitor 15 can also be used to increase the control terminal voltage of the switching unit 12, which not only improves the driving ability of the switching unit 12, but also enables the control of the IGBT with a capacitor of a lower specification (such as a 12V specification capacitor). Compared with high-voltage capacitors in the hundreds of volts level, it realizes a double reduction in cost and space.

[0047] Optionally, as Figure 6 shown, the first power distribution module 10 further includes a transient voltage suppressor TVS. The positive electrode of the transient voltage suppressor TVS is connected to the positive electrode of the energy storage capacitor 15, and the negative electrode of the transient voltage suppressor TVS is connected to the control terminal of the switching unit 12.

[0048] It should be noted that the transient voltage suppressor TVS is used to set the discharge threshold voltage for the energy storage capacitor 15. When the positive electrode voltage of the energy storage capacitor 15 is higher than the conduction voltage of the transient voltage suppressor TVS, that is, the discharge threshold voltage, the transient voltage suppressor TVS conducts; when the positive electrode voltage of the energy storage capacitor 15 does not reach the conduction voltage of the transient voltage suppressor TVS, the energy storage capacitor 15 continues to charge.

[0049] In some embodiments, the first power distribution module 10 includes an energy storage capacitor 15, a power isolation unit 11, a switching unit 12, and a DC buck unit 13. The energy storage capacitor 15 is used to connect to the external power supply 101; the input end of the power isolation unit 11 is connected to the energy storage capacitor 15; the first end of the switching unit 12 is connected to the second power distribution module and the first output end of the power isolation unit 11, and the control end of the switching unit 12 is connected to the second output end of the power isolation unit 11. The switching unit 12 is configured to control the output of the first DC voltage according to the output voltage of the power isolation unit 11; the DC buck unit 13 is connected to the second end of the switching unit 12 and the second power distribution module 20, and the DC buck unit 13 is configured to convert the first DC voltage into a second DC voltage.

[0050] It should be noted that in this embodiment, when the electric energy of the energy storage capacitor 15 reaches the threshold voltage of the power isolation unit 11, the switching unit 12 can be turned on, so as to provide the first DC voltage for the DC buck unit 13 to output the second DC voltage. This can reduce the use of the transient voltage suppressor TVS, thereby reducing the cost.

[0051] Optionally, as Figure 7As shown, the first power distribution module 10 further includes a rectification unit 16, which is used for rectification when the external power supply 101 provides alternating current. The input end of the rectification unit 16 is used to connect to the AC power supply AC, and the output end of the rectification unit 16 is connected to the input end of the power supply isolation unit 11 or the energy storage capacitor 15.

[0052] It should be noted that when the external power supply 101 is the AC power supply AC, the rectification unit 16 is used to convert the alternating current into direct current, so that the external power supply 101 can be either the AC power supply AC or the DC power supply DC, reducing the requirements for the external power supply 101 and improving the applicability of emergency start-up.

[0053] In some embodiments, as Figure 8 shown, the second power distribution module 20 includes a power battery PA1, a DC conversion unit 21, a high-voltage pre-charge unit 22, and a battery management unit BMS. The positive electrode of the power battery PA1 is connected to the first input end of the DC buck unit 13 through the switch unit 12, and the negative electrode of the power battery PA1 is connected to the second input end of the DC buck unit 13; the battery management unit BMS is connected to the output end of the DC buck unit 13, and the battery management unit BMS is configured to output an enable control signal according to the second DC voltage under the power supply of the second DC voltage; the first input end of the high-voltage pre-charge unit 22 is connected to the power battery PA1, the second input end of the high-voltage pre-charge unit 22 is connected to the output end of the DC buck unit 13, and the control end of the high-voltage pre-charge unit 22 is connected to the output end of the battery management unit BMS. The high-voltage pre-charge unit 22 is configured to perform pre-charging with the first DC voltage and output the first DC voltage according to the enable control signal and the second DC voltage; the DC conversion unit 21 is connected to the output end (HV+, HV-) of the high-voltage pre-charge unit 22 and the output end of the DC buck unit 13, and the DC conversion unit 21 is configured to convert the first DC voltage into a third DC voltage under the power supply of the second DC voltage.

[0054] It should be noted that the power battery PA1 can be a fully enclosed, semi-enclosed or as complete as possible battery module group. Compared with using a single cell in the power battery PA1 for power supply, the single cell life decays faster, which in turn affects the life of this battery pack. This embodiment can reduce the impact of emergency start-up power consumption on the life of the power battery PA1. The positive and negative electrodes of the power battery PA1 are used to transmit the first DC voltage. The first input end and the second input end of the DC buck unit 13 are used to access the first DC voltage.

[0055] When an external power supply 101 is connected, the switch unit 12 is turned on, and the DC buck unit 13 steps down the first DC voltage and outputs it as a second DC voltage. This second DC voltage can not only provide a working power supply for the high-voltage pre-charge unit 22, the battery management unit BMS, and the DC conversion unit 21, but also the high-level second DC voltage can be used as an enable signal (EN) to control the battery management unit BMS to enter the emergency start mode. After the battery management unit BMS enters the emergency start mode, it will control the high-voltage pre-charge unit 22 to output a pre-charge high voltage to pre-charge components such as capacitors required for emergency start. After the pre-charging is completed, the high-voltage pre-charge unit 22 provides the first DC voltage to the DC conversion unit 21 to be converted into a third DC voltage.

[0056] The DC conversion unit 21 is also used to electrically isolate the DC buck unit 13 from the third power distribution module 30, which can prevent the output voltage of the DC buck unit 13 from being connected in series to the third power distribution module 30, so that the DC buck unit 13 only supplies power to necessary components, which can reduce the power requirement for the first power distribution module 10, thus facilitating the DC buck unit 13 to achieve low power consumption, and optimizing the overall cost and space of the emergency start circuit 100.

[0057] In some embodiments, as Figure 9 shown, the third power distribution module 30 includes a storage battery 31 and a load 32. The positive electrode of the storage battery 31 is connected to the first output terminal (LV+) of the DC conversion unit 21, and the negative electrode of the storage battery 31 is connected to the second output terminal (LV-) of the DC conversion unit 21 and the ground terminal GND; the load 32 is connected between the first output terminal and the second output terminal of the DC conversion unit 21.

[0058] It should be noted that the load 32 can be a low-voltage electrical appliance. In the case of emergency start, the third DC voltage provided by the DC conversion unit 21 can be directly used as the emergency start voltage without the need to store energy in the storage battery 31 to provide the necessary emergency start voltage for ignition. At this time, ignition can be achieved manually or automatically, and the emergency start is successful. This saves the charging time for the storage battery 31, thereby reducing the preparation time for emergency start and improving the efficiency of emergency start.

[0059] As Figure 10 shown, the external power supply 101 can include at least one of a DC power supply DC and an AC power supply AC. The DC power supply DC can be but is not limited to a power bank, a portable charger, a mobile phone, etc., and the AC power supply AC can be but is not limited to the generator of the vehicle 200 itself or other systems or devices with power generation functions.

[0060] Figure 11It is the working flowchart of the emergency start circuit 100 provided in the exemplary embodiment of the present disclosure. Taking the use of an AC power supply AC for power supply as an example, the specific content is as follows:

[0061] Emergency start begins: When the user uses the vehicle 200 and cannot start due to a dead or discharged battery 31, the emergency start is initiated.

[0062] External power supply: Connect the AC power supply AC to activate the emergency start circuit 100. The AC power supply AC can use devices such as the vehicle's own motor to generate electricity.

[0063] Energy storage voltage detection: The alternating current generated by the AC power supply AC is inverted into direct current by the rectification unit 16. The direct current is isolated by the power isolation unit 11, then boosted by the DC boost unit 14, and finally the electrical energy is stored in the energy storage capacitor 15. When the voltage of the energy storage capacitor 15 is higher than a set threshold, such as the conduction voltage of the transient voltage suppressor TVS, the transient voltage suppressor TVS conducts, and the energy storage capacitor 15 starts to discharge. When the discharge threshold voltage is not reached, it continues to charge. Among them, when the AC voltage provided by the AC power supply AC does not meet the conduction control requirements of the switch unit 12, the DC boost unit 14 is required to boost the voltage. Here, if the AC voltage provided by the AC power supply AC meets the conduction control requirements of the switch unit 12, the DC boost unit 14 can be omitted. If the AC power supply AC can supply power continuously and stably, at least one of the energy storage capacitor 15 and the transient voltage suppressor TVS can also be omitted.

[0064] Discharge of the energy storage capacitor 15: The switch unit 12 conducts, controlling the first DC voltage provided by the power battery PA1 to be transmitted to the DC buck unit 13. In this embodiment, the negative electrode of the energy storage capacitor 15 is connected to the positive bus of the power battery PA1, and the positive electrode of the energy storage capacitor 15 is connected to the control terminal of the switch unit 12 through the transient voltage suppressor TVS, which can pull up the positive voltage of the energy storage capacitor 15. A 12V capacitor can be used to control the switch unit 12, achieving a double reduction in cost and space compared to high-voltage capacitors in the hundreds of volts range. In this embodiment, the power battery PA1 can be a fully enclosed, semi-enclosed, or as complete a battery module as possible to reduce the impact of emergency start power consumption on the life of the power battery PA1.

[0065] Output voltage of the DC buck unit 13: The DC buck unit 13 exemplarily outputs a second DC voltage of 12V. After the switch unit 12 conducts, the DC buck unit 13 immediately starts to work, converting the high-voltage power provided by the power battery PA1 into a low-voltage power of 12V, which supplies power to the high-voltage pre-charge unit 22, the battery management unit BMS, and the DC conversion unit 21. In this embodiment, the DC buck unit 13 is matched with the circuit it supplies power to, and only supplies power to necessary components, reducing the output power of the DC buck unit 13.

[0066] The battery management unit BMS and the DC conversion unit 21 enter the emergency start mode. The second DC voltage output by the DC buck unit 13 not only powers the battery management unit BMS and the DC conversion unit 21, but also provides an additional enable signal (EN). When this enable signal is valid, the battery management unit BMS quickly enters the emergency start mode and starts high-voltage pre-charging. In this embodiment, the enable signal is active high.

[0067] High-voltage pre-charging: After the battery management unit BMS enters the emergency start mode, it starts to control the high-voltage pre-charging unit 22 to start pre-charging according to the high-voltage pre-charging strategy. After the pre-charging is completed, the high-voltage pre-charging unit 22 outputs the first DC voltage, the high-voltage side circuit of the DC conversion unit 21 is turned on, and the battery management unit BMS sends a working command to the DC conversion unit 21. The high-voltage pre-charging solution can be but is not limited to the contactor pre-charging solution or the DC / DC reverse pre-charging solution. In the contactor pre-charging solution, the operating power supply of the contactor uses the 12V power supply provided by the DC buck unit 13. Similarly, in the DC / DC reverse pre-charging solution, the power supply required for DC / DC reverse pre-charging is also provided by the DC buck unit 13.

[0068] Output voltage of the DC conversion unit 21: In this embodiment, after the high-voltage pre-charging is completed, the high-voltage side circuit of the DC conversion unit 21 is turned on. When it receives the working command from the battery management unit BMS or the high-voltage conduction time exceeds the set threshold, the DC conversion unit 21 starts to work and outputs the third DC voltage of 12V to power the third power distribution module 30.

[0069] Start the vehicle 200, and the emergency start is successful. After the DC conversion unit 21 works, the third power distribution module 30 is powered on, and the whole vehicle meets the start conditions. In this embodiment, the whole vehicle can add an audible and visual prompt to remind the user to manually operate the vehicle 200 to power on, or it can be designed to power on automatically, light up the display devices such as the whole vehicle instrument and the central control. After the power-on is completed, disconnect the connected external power supply 101 and exit the emergency start mode. In practical applications, it can be further optimized based on manual power-on. For example, if the power-on is not completed within the set time, the whole vehicle is powered off.

[0070] In one of the embodiments, the embodiment of the present application also provides a vehicle 200, as Figure 12 shown, the vehicle 200 includes the above-mentioned emergency start circuit 100.

[0071] It can be understood that since the vehicle 200 in the embodiment of the present application includes the above-mentioned emergency start circuit 100, it can also convert the first DC voltage into the second DC voltage by the first power distribution module 10 when connecting to the external power supply 101. The second power distribution module 20 provides the first DC voltage and converts the first DC voltage into the third DC voltage according to the second DC voltage. The third power distribution module 30 uses the third DC voltage as the emergency start voltage. The second power distribution module 20 can be triggered by the external power supply 101 to provide the first DC voltage for the first power distribution module 10, so that the first power distribution module 10 supplies power to the third power distribution module 30 through the second power distribution module 20. Thus, no matter whether the third power distribution module 30 is in a power-deficient state or a power-off state, the emergency start voltage can be provided, and then the emergency start of the vehicle 200 can be realized. This not only improves the adaptability of the emergency start, but also reduces the requirements for the external power supply 101 and improves the convenience of the emergency start.

[0072] In one embodiment, the embodiment of the present application further provides an electronic device 300, as Figure 13 shown. The electronic device 300 includes the above-mentioned emergency start circuit 100 or vehicle 200.

[0073] It can be understood that since the electronic device 300 in the embodiment of the present application includes the above-mentioned emergency start circuit 100 or vehicle 200, it can also convert the first DC voltage into the second DC voltage by the first power distribution module 10 when connecting to the external power supply 101. The second power distribution module 20 provides the first DC voltage and converts the first DC voltage into the third DC voltage according to the second DC voltage. The third power distribution module 30 uses the third DC voltage as the emergency start voltage. The second power distribution module 20 can be triggered by the external power supply 101 to provide the first DC voltage for the first power distribution module 10, so that the first power distribution module 10 supplies power to the third power distribution module 30 through the second power distribution module 20. Thus, no matter whether the third power distribution module 30 is in a power-deficient state or a power-off state, the emergency start voltage can be provided, and then the emergency start of the vehicle 200 can be realized. This not only improves the adaptability of the emergency start, but also reduces the requirements for the external power supply 101 and improves the convenience of the emergency start.

[0074] In the description of the present application, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of the present application, "a plurality" means two or more, unless otherwise specifically defined.

[0075] In the above embodiments, the descriptions of the respective embodiments each have their own emphasis. For parts not detailed in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

[0076] Among the embodiments, implementation manners and related technical features of the present application, they can be combined and replaced with each other without conflict.

[0077] The above are only the preferred embodiments of the present application, and do not impose any form of limitation on the present application. However, any simple modifications, equivalent changes and decorations made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application still fall within the scope of the technical solution of the present application.

Claims

1. An emergency starting circuit, characterized in that, The emergency start-up circuit includes: A first power distribution module configured to convert a first DC voltage into a second DC voltage when an external power source is connected; A second power distribution module connected to the first power distribution module and configured to provide the first DC voltage and convert the first DC voltage into a third DC voltage according to the second DC voltage; A third power distribution module connected to the second power distribution module and configured to use the third DC voltage as the emergency start-up voltage.

2. The emergency start-up circuit according to claim 1, characterized in that, The first power distribution module includes: A power isolation unit configured to isolate the external power source from the emergency start-up circuit; A switch unit connected to the power isolation unit and the second power distribution module and configured to control the second power distribution module to provide the first DC voltage to the first power distribution module according to the output voltage of the power isolation unit; A DC buck unit connected to the switch unit and the second power distribution module and configured to convert the first DC voltage into the second DC voltage.

3. The emergency start-up circuit according to claim 2, characterized in that, The switch unit includes an insulated gate bipolar transistor. The first pole of the insulated gate bipolar transistor is connected to the first output end of the power isolation unit and the first output end of the second power distribution module. The gate of the insulated gate bipolar transistor is connected to the second output end of the power isolation unit. The second pole of the insulated gate bipolar transistor is connected to the first input end of the DC buck unit.

4. The emergency start-up circuit according to claim 2, characterized in that The first power distribution module further includes a DC boost unit. The input end of the DC boost unit is connected to the output end of the power isolation unit. The first output end of the DC boost unit is connected to the control end of the switch unit. The second output end of the DC boost unit is connected to the first output end of the second power distribution module and the first end of the switch unit.

5. The emergency start-up circuit according to claim 4, wherein, The first power distribution module further includes an energy storage capacitor. The positive pole of the energy storage capacitor is connected to the first output end of the DC boost unit and the control end of the switch unit. The negative pole of the energy storage capacitor is connected to the first output end of the second power distribution module and the first end of the switch unit.

6. The emergency start-up circuit according to claim 5, characterized in that, The first power distribution module further includes a transient voltage suppressor. The positive pole of the transient voltage suppressor is connected to the positive pole of the energy storage capacitor. The negative pole of the transient voltage suppressor is connected to the control end of the switch unit.

7. The emergency startup circuit according to claim 1, wherein The first power distribution module includes: An energy storage capacitor for connecting to the external power source; A power isolation unit with its input end connected to the energy storage capacitor; A switch unit with its first end connected to the second power distribution module and the first output end of the power isolation unit, and its control end connected to the second output end of the power isolation unit. The switch unit is configured to control the output of the first DC voltage according to the output voltage of the power isolation unit; A DC step-down unit, which is connected to the second end of the switching unit and the second power distribution module, and is configured to convert the first DC voltage into the second DC voltage.

8. The emergency start-up circuit according to any one of claims 2-7, characterized in that, The first power distribution module further includes a rectification unit, which is used for rectification when the external power supply provides alternating current.

9. The emergency start-up circuit according to any one of claims 2-7, characterized in that, The second power distribution module includes: A power battery, the positive electrode of the power battery is connected to the first input end of the DC step-down unit through the switching unit, and the negative electrode of the power battery is connected to the second input end of the DC step-down unit; A battery management unit, which is connected to the output end of the DC step-down unit, and is configured to output an enable control signal according to the second DC voltage under the power supply of the second DC voltage; A high-voltage pre-charge unit, the first input end of the high-voltage pre-charge unit is connected to the power battery, the second input end of the high-voltage pre-charge unit is connected to the output end of the DC step-down unit, the control end of the high-voltage pre-charge unit is connected to the output end of the battery management unit, and the high-voltage pre-charge unit is configured to perform pre-charging through the first DC voltage according to the enable control signal and the second DC voltage and output the first DC voltage; A DC conversion unit, which is connected to the output end of the high-voltage pre-charge unit and the output end of the DC step-down unit, and is configured to convert the first DC voltage into the third DC voltage under the power supply of the second DC voltage.

10. The emergency start-up circuit according to claim 9, wherein, The third power distribution module includes: A storage battery, the positive electrode of the storage battery is connected to the first output end of the DC conversion unit, and the negative electrode of the storage battery is connected to the second output end of the DC conversion unit and the ground terminal; A load, which is connected between the first output end and the second output end of the DC conversion unit.

11. A vehicle, characterized in that, The vehicle includes the emergency start circuit according to any one of claims 1-10.

12. An electronic device, characterized in that, The electronic device includes the emergency start circuit according to any one of claims 1-10, or the electronic device includes the vehicle according to claim 11.

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