Automobile emergency starting power supply equipment and control method thereof

Abstract

The invention provides an automobile emergency starting power supply device and a control method thereof, and the device comprises a charging input module which is configured to be connected to an external input power supply and receive an external input voltage, and at least comprises a USB external DC power supply input interface; the voltage conversion module is configured to convert an external input voltage into a voltage suitable for charging an automobile battery; a super capacitor module; an output connection module configured to be electrically connected to an automobile battery; the equipment control module is configured to output a working control signal; and the charging and starting control module is configured to control a charging path to be conducted in a charging mode and control a discharging path of the super capacitor to be conducted in a starting mode. The invention provides automobile emergency starting power supply equipment, which can be used for charging an automobile battery and charging a super capacitor through an external input power supply input by at least one USB interface in a charging mode, and can be used for starting the charged automobile battery under the assistance of the super capacitor in a starting mode.

Description

Technical Field

[0001] This application relates to the field of automotive emergency jump starter technology, specifically to an automotive emergency jump starter device and its control method. Background Technology

[0002] With the increasing prevalence of automobiles, the need for emergency jump starters in cars and trucks with low battery power is also growing. While many types of emergency jump starters are available on the market, most rely solely on their built-in batteries, requiring them to be carried in the vehicle for extended periods and necessitating frequent charging and maintenance to ensure sufficient charge. If the battery runs low, the car will be difficult to start. Furthermore, the batteries in emergency jump starters experience some wear and tear during electrochemical reactions, and repeated charging affects their cycle life and time lifespan. This makes them relatively expensive for occasional emergencies, inconvenient to carry, and dangerous to transport high-powered portable power supplies. Some supercapacitor emergency jump starters on the market do not have their own built-in energy storage batteries. Instead, they rely on reverse charging from the car battery or a pre-installed small battery to charge the capacitor. However, due to limitations in charging methods, if the car battery is low, it cannot provide enough power to assist in starting the supercapacitor. Additionally, the supercapacitor's small capacity allows for only short-term discharge. During discharge, the depleted car battery will absorb some of the energy. If the timing of the start-up is not accurately determined, relying on the short-term discharge current when the supercapacitor is turned on to start the machine is prone to failure.

[0003] Nowadays, more and more car owners carry various portable power banks. However, because most portable power banks are energy storage devices and do not have the voltage to start a car or a dedicated car starter function, they cannot be used for roadside assistance. When a car is out of power and cannot start, even if it has other forms of power, it cannot replenish the car's power or assist in starting it. Furthermore, widely used energy storage power banks, power tool battery packs, and solar panels, which are used to power mobile phones and other devices, cannot help start a car, causing inconvenience to users. Summary of the Invention

[0004] To address the problems in the prior art, the purpose of this application is to provide an automotive emergency jump starter device and its control method. The device is compatible with various types of external input power sources. In charging mode, it can replenish the car battery and charge the supercapacitor through the external input power source. In starting mode, the car battery, after being replenished, can start with the assistance of the supercapacitor.

[0005] This application provides an automotive emergency jump starter device, including: A charging input module is configured to connect to an external input power source and receive an external input voltage. The charging input module includes at least one USB external DC power input interface. A voltage conversion module is configured to boost or buck the external input voltage input to the charging input module and convert it into a voltage suitable for charging the vehicle battery; Supercapacitor module, including supercapacitors; The output connection module is configured to be electrically connected to the car battery. The device control module is configured to output working control signals based on the current working mode, which is either charging mode or start-up mode. The charging and starting control module is configured to respond to a working control signal to control the conduction of the path for charging the vehicle battery based on the external input voltage in charging mode, and to charge the vehicle battery and the supercapacitor based on the external input voltage; and to control the conduction of the discharge path from the supercapacitor to the output connection module in starting mode, so that the supercapacitor and the charged vehicle battery work together to discharge to the vehicle starting system.

[0006] In some embodiments, the device control module is further configured to output a voltage conversion control signal based on the matching result between the input voltage detection signal of the charging input module and the target voltage; The voltage conversion module is configured to respond to the voltage conversion control signal and, when the external input power supply does not match the target voltage, to boost or buck the external input voltage and output it to the charging and start-up control module.

[0007] In some embodiments, the working control signal includes a charging control signal and a start control signal, and the charging and start control module includes a charging control switch and a start control switch; The charging control switch responds to the charging control signal to control the conduction of the path for charging the car battery based on the external input voltage, and the device control module controls the charging current by controlling the duty cycle of the voltage conversion control signal. The start control switch responds to the start control signal to control the conduction of the discharge path from the supercapacitor to the output connection module.

[0008] In some embodiments, the charging and starting control module is further configured to control the path conduction for charging the vehicle battery based on an external input voltage in a starting mode in response to an operating control signal.

[0009] In some embodiments, the device control module is configured to obtain an input voltage detection signal from the charging input module and a battery voltage detection signal from the output connection module. When it is determined based on the input voltage detection signal that an external input power source is currently connected and the battery charging requirements are met according to the battery voltage detection signal, the module enters the charging mode. When the battery charging requirements are met according to the battery voltage detection signal, the module exits the charging mode.

[0010] In some embodiments, the device control module is further configured to allow entry into the start-up mode when the battery voltage is determined to be greater than or equal to a preset start-up requirement voltage based on the battery voltage detection signal of the output connection module. The preset start-up requirement voltage is less than the full charge voltage of the car battery, so as to ensure that there is enough energy to start the car with the assistance of the supercapacitor while shortening the waiting time for the car battery to be recharged.

[0011] In some embodiments, the supercapacitor module includes a plurality of supercapacitors and a charging equalization circuit, wherein the charging equalization circuit is configured to detect the voltage of each supercapacitor and release the supercapacitor to release energy when the voltage of the supercapacitor is higher than a preset capacitance threshold.

[0012] In some embodiments, the control module is further configured to acquire a voltage detection signal of the vehicle battery when in standby mode and the output connection module is connected to a load.

[0013] In some embodiments, the USB external DC power input interface includes a USB-A interface and / or a USB Type-C interface, and the USB external DC power input interface supports at least one of the following protocols: USB PD protocol, QC protocol, UFCS converged fast charging protocol, VOOC protocol, SCP protocol, AFC protocol, and PE protocol.

[0014] In some embodiments, the voltage conversion module includes a DC-DC buck-boost circuit.

[0015] This application also provides a control method for an automotive emergency jump starter device, using the aforementioned automotive emergency jump starter device, the method comprising: When the charging input module receives an external power input, the device control module determines that an external power input has been connected based on the input voltage detection signal of the charging input module. When the battery voltage detection signal from the output connection module determines that the battery charging requirements are met, the device control module enters the charging mode. Based on the matching result between the input voltage detection signal from the charging input module and the target voltage, the device control module outputs a voltage conversion control signal to the voltage conversion module and a charging control signal to the charging and start control module. The voltage conversion module responds to the voltage conversion control signal to boost or buck the input voltage and outputs it to the charging and starting control module; the charging and starting control module responds to the charging control signal to control the conduction of the path for charging the car battery based on the external input voltage, and charges the car battery and supercapacitor based on the external input power. The device control module determines that the battery voltage is greater than or equal to the preset start-up requirement voltage based on the battery voltage detection signal of the output connection module. When the battery voltage is greater than or equal to the preset start-up requirement voltage, the start-up mode is allowed. In the start-up mode, a discharge control signal is output. The preset start-up requirement voltage is less than the full charge voltage of the car battery, so as to ensure that there is enough energy to start the car with the assistance of the supercapacitor, while also shortening the waiting time for the car battery to be recharged. The charging and starting control module responds to the discharge control signal and controls the discharge path from the supercapacitor to the output connection module to be turned on, so that the supercapacitor and the charged car battery work together to discharge to the car starting system.

[0016] The automotive emergency jump starter device and its control method provided in this application have the following advantages: This application provides a car emergency jump starter device that supports USB external power input. A voltage conversion module can boost or buck the externally input DC voltage to a voltage suitable for charging the car battery. In charging mode, it can replenish the car battery and charge the supercapacitor via external power input. By charging the depleted car battery, it provides energy replenishment and improves the car battery's starting performance. In starting mode, the recharged car battery can start with the assistance of the supercapacitor, increasing the success rate of starting the car using this emergency jump starter and enhancing user confidence. This solution eliminates the need for the jump starter device itself to carry a battery, avoiding repeated charging in daily life, and mitigating the dangers of transporting high-power portable power supplies while energized. It also reduces the size and weight of the jump starter device, making it more portable. Attached Figure Description

[0017] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings.

[0018] Figure 1 This is a structural block diagram of an automotive emergency jump starter device according to an embodiment of this application; Figure 2 This is a structural block diagram of a specific example of an automotive emergency jump starter device according to this application; Figure 3 This is a circuit diagram of a charging input module according to an embodiment of this application; Figure 4 This is a circuit diagram of a voltage conversion module according to an embodiment of this application; Figure 5 This is a circuit diagram of a supercapacitor module according to an embodiment of this application; Figure 6This is a circuit diagram of an output connection module according to an embodiment of this application; Figure 7 This is a circuit diagram of a charging and starting control module according to an embodiment of this application; Figure 8 This is a circuit diagram of a device control module according to an embodiment of this application; Figure 9 This is a circuit diagram of the operation and display module according to an embodiment of this application; Figure 10 This is a flowchart of a control method for an automotive emergency jump starter device according to an embodiment of this application. Detailed Implementation

[0019] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this application will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore repeated descriptions of them will be omitted. Although the terms "first" or "second," etc., are used in this specification to denote certain features, these are merely indicative of function and not as a limitation on the number or importance of specific features.

[0020] like Figure 1 As shown in the figure, this application embodiment provides an automotive emergency jump starter device, including: The charging input module M100 is configured to connect to an external input power source and receive an external input voltage. The charging input module M100 includes at least one USB external DC power input interface. In this embodiment, the USB external DC power input interface includes at least one of a USB-A interface, a USB Type-C interface, or other types of USB interfaces. The USB external DC power input interface supports at least one of the following protocols: USB PD protocol, QC protocol, UFCS converged fast charging protocol, VOOC protocol, SCP protocol, AFC protocol, PE protocol, and other fast charging protocols. Optionally, the USB external DC power input interface may support PPS programmable power functionality. The voltage conversion module M200 is configured to boost or buck the external input voltage input to the charging input module M100 into a voltage suitable for charging the car battery. The M500 supercapacitor module includes a supercapacitor; the supercapacitor can provide assistance to the car battery during startup. Output connection module M400 is configured to be electrically connected to the car battery; output connection module M300 is used for the emergency jump starter device to quickly establish a connection with the external car battery, and includes, for example, positive and negative clips, which are connected to the positive and negative terminals of the car battery respectively when connecting to the car battery. The device control module M600 is configured to output working control signals based on the current working mode, which is either charging mode or start-up mode. The charging and starting control module M300 is configured to, in response to a working control signal, control the conduction of the path for charging the vehicle battery based on an external input voltage in charging mode, charging both the vehicle battery and the supercapacitor based on the external input voltage, so that the supercapacitor stores energy while simultaneously replenishing the vehicle battery; in starting mode, it controls the conduction of the discharge path from the supercapacitor to the output connection module, so that the supercapacitor and the charged vehicle battery work together to discharge to the vehicle starting system (such as including the vehicle starter motor), providing assistance to the vehicle battery through the instantaneous discharge of the supercapacitor, and safely and effectively starting the vehicle starting system. In this embodiment, the supercapacitor module M500 is connected to the charging and starting control module M300, and the charging and starting control module M300 assists in starting by charging the supercapacitor or discharging it.

[0021] In this embodiment, the purpose of charging the car battery with an external input voltage is to replenish its charge, not to fully charge it, but to maximize its starting capability. Therefore, in start-up mode, when the supercapacitor and the charged car battery work together to discharge into the car starting system, the car battery does not need to be at full charge. A preset start-up requirement voltage is established, which is lower than the car battery's full charge voltage. When the car battery is charged to a voltage greater than or equal to the preset start-up requirement voltage, it is allowed to enter start-up mode. In start-up mode, the car battery and supercapacitor work together to start the car, ensuring sufficient energy to start the vehicle with the assistance of the supercapacitor while also shortening the battery recharging waiting time.

[0022] By adopting the automotive emergency jump starter device of this application, the charging input module M100 can obtain the automotive emergency jump starter device input via the USB external DC power input interface. The voltage conversion module M200 can boost or buck the external input voltage input to the charging input module M100 to a voltage suitable for charging the automotive battery. Even if the external input voltage is lower than the required charging voltage for the automotive battery, it can still charge the automotive battery through boosting. The output connection module M400 enables the electrical connection between the automotive emergency jump starter device and the automotive battery. Under the control of the device control module M600 and the charging and starting control module M300, in charging mode, it can replenish the automotive battery and charge the supercapacitor in the supercapacitor module M500 through the external input power. By charging the depleted automotive battery, it provides energy replenishment to the automotive battery and helps improve the starting performance of the automotive battery. In starting mode, the automotive battery after replenishment can start with the assistance of the supercapacitor, which increases the success rate of starting the car using the automotive emergency jump starter and enhances user confidence. By adopting the solution of this application, the car emergency jump starter device itself does not need to carry a battery, avoiding repeated charging of the battery of the car emergency jump starter device in daily life, avoiding the danger of transporting high-power mobile power devices with electricity, and also helping to reduce the size and weight of the car emergency jump starter device, making the car emergency jump starter device more portable.

[0023] Existing supercapacitor starting processes rely on the energy in a single supercapacitor to start the car. This application, however, simultaneously charges the supercapacitor and replenishes the car battery, consuming a certain amount of battery replenishment time. This allows the car battery to receive as much energy as possible before starting, enabling the replenished battery and supercapacitor to work together during startup, thereby improving the starting success rate.

[0024] In this embodiment, the operating control signal includes a charging control signal and a start control signal. The charging and start control module includes a charging control switch and a start control switch. The charging control switch responds to the charging control signal to control the conduction of the path for charging the vehicle battery based on the external input voltage. The device control module controls the charging current to the vehicle battery by controlling the duty cycle of the charging control signal, thereby limiting the charging current to a safe range and preventing excessive charging current from impacting the vehicle battery. The start control switch responds to the start control signal to control the conduction of the discharge path from the supercapacitor to the output connection module.

[0025] In this embodiment, the charging and starting control module is also configured to control the conduction of the path for charging the vehicle battery based on the external input voltage in response to the operating control signal in starting mode. Therefore, in starting mode, both the external input power supply and the supercapacitor can assist in starting the vehicle battery. Thus, during the vehicle starting process, multiple power sources, including the external input power supply, the supercapacitor, and the charged vehicle battery, can simultaneously provide electrical energy to the vehicle starting system, further improving the success rate of vehicle starting.

[0026] In this embodiment, to better adapt to different external input voltages from different types of external power sources, the device control module is further configured to output a voltage conversion control signal based on the matching result between the input voltage detection signal of the charging input module and the target voltage. The voltage conversion module is configured to respond to the voltage conversion control signal by boosting or bucking the external input voltage before outputting it to the charging and start-up control module when the external input power supply and target voltage do not match. Thus, this emergency start-up power supply device can uniformly convert all external input voltages into the safe voltage required for charging the supercapacitor and automotive battery, achieve maximum output power control, and simultaneously provide operating power to various internal power-consuming modules.

[0027] like Figure 2 As shown, in this embodiment, the car emergency jump starter device also includes an operation and display module M700, which provides a human-machine interface, such as receiving user operation information through panel buttons and providing LED indicators to indicate the real-time working status of the emergency jump starter device.

[0028] In this embodiment, the charging input module is further configured to detect the external input voltage and output a voltage detection signal to the device control module. The output connection module is further configured to detect the vehicle battery voltage and output a battery voltage detection signal to the device control module. The device control module is configured to acquire the input voltage detection signal from the charging input module and the battery voltage detection signal from the output connection module. When it is determined that an external power source is currently connected based on the input voltage detection signal and the battery charging requirements are met based on the battery voltage detection signal, the module enters the charging mode. When the charging stop requirement is met based on the battery voltage detection signal, the module exits the charging mode. For example, the battery charging requirement is that the vehicle battery voltage is below a first threshold, and the charging stop requirement is that the vehicle battery voltage is above a second threshold. When the emergency jump starter is connected to an external power source and the vehicle battery voltage is below the first threshold, the charging and start control module is controlled to connect the charging path of the vehicle battery and output a charging voltage to the vehicle battery through the output connection module. During the charging process, the device control module acquires the battery voltage detection signal in real time. When it determines that the vehicle battery voltage is above the second threshold, the charging and start control module is controlled to disconnect the charging path of the vehicle battery and stop charging the vehicle battery. As mentioned earlier, in this application, charging the car battery via an external input voltage is not intended to fully charge the battery, but rather to replenish its charge. Therefore, the second threshold can be set to be lower than the full-charge voltage of the car battery to ensure sufficient energy to start the car with the assistance of the supercapacitor while also shortening the battery recharging waiting time. A second threshold can be selected based on testing or experience, such that when the car battery voltage is greater than the second threshold, the supercapacitor and the recharged car battery can successfully start the car.

[0029] In this embodiment, the device control module is further configured to allow entry into the start-up mode when the battery voltage is greater than or equal to a preset start-up requirement voltage based on the battery voltage detection signal from the output connection module. The preset start-up requirement voltage is less than the full-charge voltage of the car battery, ensuring sufficient energy to start the car with the assistance of the supercapacitor while also shortening the waiting time for the car battery to be recharged. Here, "allowing entry into the start-up mode" means either automatically entering the start-up mode when the battery voltage is greater than or equal to the preset start-up requirement voltage, or allowing entry into the start-up mode and issuing a start-up permission signal (such as an indicator light from the panel indicator) when the battery voltage is greater than or equal to the preset start-up voltage, waiting for an external start-up signal (such as an external start-up signal input by the user via an external button), and entering the start-up mode upon receiving the external start-up signal. Optionally, the device control module is further configured to determine whether the cooperative discharge conditions are met based on the battery voltage detection signal from the output connection module. When the battery voltage is greater than or equal to a preset start-up requirement voltage and the cooperative discharge conditions are met, entry into the start-up mode is permitted. Start-up is then performed through cooperative discharge of the car battery and supercapacitor. Cooperative discharge conditions include, for example, the car battery voltage being less than a third threshold. In this case, if starting solely with the car battery is not possible, start-up may fail because the car battery cannot meet the instantaneous high current demand of the car's starting system; therefore, the start-up mode is entered. The third threshold, greater than the preset start-up requirement voltage, represents the minimum voltage limit required to ensure start-up through discharge of the car battery alone. Therefore, when the battery voltage is greater than or equal to the preset start-up requirement voltage but less than the third threshold, the start-up mode is entered, and start-up is assisted by the supercapacitor, or by a combination of external input power and the supercapacitor. When the battery voltage is greater than or equal to the third threshold, the start-up mode is entered, and start-up can still be assisted by the supercapacitor and / or external input power, or it can be started by discharging the car battery alone.

[0030] In this embodiment, the supercapacitor module includes multiple supercapacitors and a charging equalization circuit. The charging equalization circuit is configured to detect the voltage of each supercapacitor and release the supercapacitor to release energy when the voltage of the supercapacitor is higher than a preset capacitance threshold, thereby effectively protecting the supercapacitor and preventing overvoltage damage.

[0031] In this embodiment, the emergency start-up power supply module may further include a standby mode in addition to the charging mode and the start-up mode. The control module is also configured to supply power to the load based on the external input voltage when the output connection module is connected to the load in standby mode.

[0032] Figures 3-9 The schematic circuit structure of each module in this embodiment is shown. The following is in conjunction with... Figures 3-9 Some specific implementation methods of this embodiment will be described in detail. However, it is understood that... Figures 3-9The circuit structure shown and the description below are merely examples and are not intended to limit the scope of protection of this application.

[0033] Figure 3 This is a circuit diagram of a charging input module according to an embodiment of this application. In this embodiment, the charging input module is used to receive external input voltage, filter the external input voltage, and provide feedback information about the external input voltage. In this embodiment, the charging input module includes multiple input power interfaces for receiving external input voltages from various types of external power sources to charge the supercapacitor and automotive battery inside the device, thereby making the charging input module compatible with various types of external input power sources. Figure 3 As shown, the charging input module includes various external input interfaces corresponding to different external power supplies, such as an AC-DC adapter (AC-DC / OUT+), a USB external power input interface (USB / OUT+), and a 5-40VDC wide-voltage power supply (5-40VDC-VIN). The charging input module also obtains the battery feedback voltage signal through the OUT-BATTERY-VIN port. The outputs of the charging input module include: a stable voltage (CH-VIN, output to the input of the voltage conversion module) after filtering the external input voltage, and a charging status monitoring signal (CH_AD, output to the PA08 pin of the device control module). The external power supply CH-VIN supplies power to the VC+ power input of the device control module through diode D5.

[0034] The charging input module operates as follows: After an external power supply is connected, ripple is filtered out by capacitors C3 and C5, and current is limited by voltage divider resistors R17 and R18 to ensure stable input voltage. The external input voltage value is acquired through the voltage divider resistors and fed back to the device control module via the CH_AD signal. This allows the device control module to determine whether an external power supply is currently connected and to determine the voltage range of the external input voltage.

[0035] Figure 4 This is a circuit diagram of a voltage conversion module according to an embodiment of this application. In this embodiment, the voltage conversion module includes a DC-DC buck-boost circuit, for example, a bidirectional full-bridge DC-DC converter with buck / boost functionality. The voltage conversion module is used to convert the stable voltage output from the charging input module (the voltage output from CH-VIN) into a target voltage (such as a 12V / 24V automotive standard voltage, but this application is not limited to this) suitable for the automotive battery, supercapacitor, and charging and start-up control module. The voltage conversion module also provides current sampling feedback to achieve current closed-loop control. The input terminal of the voltage conversion module is connected to the CH-VIN terminal of the charging input module to receive the stable voltage. The output terminal of the voltage conversion module includes a stable voltage output terminal (CH-OUT+, outputting the charging voltage to the charging and start-up control module).

[0036] The control terminals of the voltage conversion module include the following ports: (1) A control port (MOS gate control signal) for receiving corresponding control commands from the device control module, which includes: HG1 (corresponding to PC06 pin of the device control module), LG1 (corresponding to PC05 pin of the device control module), HG2 (corresponding to PC07 pin of the device control module), and LG2 (corresponding to PD06 pin of the device control module). (2) A feedback port for outputting the sampled current to the device control module, which includes: CSP1 / CSN1 and CSP2 / CSN2.

[0037] The voltage conversion module's operation includes: The device control module determines the operating condition based on the CH_AD signal (external input voltage signal, used to determine whether the external input power supply is connected and the range of the external input voltage) input from the charging input module and the OUT_AD signal (vehicle battery voltage feedback voltage, input to the PA09 pin of the device control module) obtained from the output connection module or charging and start-up control module: If CH-VIN (external input voltage value) < target voltage (target voltage for vehicle battery charging): The device control module controls HG1 / LG1 to conduct, enabling MOSFET Q2 and Q5 operates in boost mode, using inductor L1 to store energy and boost the voltage. If CH-VIN > target voltage: the device control module controls HG2 / LG2 to conduct, and MOSFET Q6 operates in buck mode, adjusting the duty cycle to reduce the voltage. If the voltage matches, i.e., CH-VIN = target voltage: MOSFETs Q2 and Q6 are directly turned on to reduce losses. CSP1 / CSN1 and CSP2 / CSN2 collect input and output currents and feed them back to the device control module to control the MOSFET duty cycle to achieve overcurrent protection. Resistors R1, R6, R9, and R11 are gate current-limiting resistors for MOSFETs to prevent MOSFET breakdown.

[0038] Figure 5 This is a circuit diagram of a supercapacitor module according to an embodiment of this application. In this embodiment, the supercapacitor module includes a supercapacitor bank composed of multiple supercapacitors and a charging equalization circuit. The supercapacitor module is used to store electrical energy, provide instantaneous high current to assist in charging the car battery, and simultaneously achieve voltage equalization of the supercapacitors through the charging equalization circuit. The voltage output terminal CH-OUT+ of the voltage conversion module charges the supercapacitor bank through diode D3. The charging equalization circuit includes equalization chips (IC1, IC3, IC4, IC6), equalization MOSFETs (Q8, Q9, Q10, Q11), equalization resistors (R21 / R23 / R25 / R26 / R27), and voltage detection resistors (R34 / R35 / R38 / R39 / R41). The output terminal C5+ of the supercapacitor bank supplies power to the power supply terminal VC+ of the device control module through diode D4.

[0039] The charging equalization process of the supercapacitor module includes: when charging the supercapacitor bank through the charging and start-up control module, the voltage of each supercapacitor (CS1~CS5) is collected through the voltage detection resistor. If the voltage of a single supercapacitor is too high (e.g., exceeding 3.0V), the equalization chip controls the equalization MOSFET to turn on, and releases the excess energy through the equalization resistor to avoid damage to the supercapacitor due to overvoltage.

[0040] The process by which the supercapacitor module provides starting assistance through discharge includes: When the car starts, the charging and starting control module controls the supercapacitor to discharge to the output terminal of the output connection module. The supercapacitor is connected in parallel with the car battery, providing a large instantaneous current of 100A+ to assist the car battery, which has insufficient instantaneous discharge capacity. During charging and discharging, the current signal is fed back to the device control module through CSP2 / CSN2 to monitor the charging and discharging current and prevent damage to the supercapacitor due to overcurrent.

[0041] Figure 6 This is a circuit diagram of an output connection module according to an embodiment of this application. The output connection module is used to provide emergency jump start power to the car battery and backup power, while also providing feedback on the battery status. The connection terminals of the output connection module include: BAT+ / OUT, BAT- / OUT (connected to the output terminal of the charging and start control module), and OUT-BATTERY-VIN (providing battery voltage feedback to the device control module and the charging input module).

[0042] The output connection module's operation includes: In charging mode, it receives electrical energy from the CH-OUT+ output of the charging and start-up control module to charge the car battery. Simultaneously, OUT-BATTERY-VIN provides real-time feedback of the battery voltage signal. When the battery voltage exceeds a second threshold, the device control module controls the charging and start-up control module to stop charging. In start-up mode, it discharges through a supercapacitor connected in parallel with the car battery, outputting through the OUT+ (… Figure 7 Together, they discharge into the car's starting system. In standby mode, the car battery can act as a backup power source, discharging through the output port OUT+ ( Figure 7 It supplies power to low-power vehicle loads (such as dashcams) while simultaneously sending battery status feedback to the charging input module via OUT-BATTERY-VIN to prevent over-discharge. Because the output port OUT+ is connected in parallel with the positive and negative terminals of the car battery in real time, the OUT-BATTERY-VIN signal monitors the input and output voltage status of the car battery in real time. If any voltage abnormality occurs at either end, a notification is sent to the user to prevent over-discharge.

[0043] Figure 7This is a circuit diagram of a charging and starting control module according to an embodiment of this application. The charging and starting control module receives the voltage converted by the voltage conversion module and, under the control of the device control module, switches between three operating modes: charging mode, starting mode, and standby mode. The voltage input terminal of the charging and starting control module is connected to the output terminal CH-OUT+ of the voltage conversion module, and the input terminal of the charging and starting control module is also connected to the C1+ terminal of the supercapacitor module. The control terminals of the charging and starting control module include CH-Ctrl (charging control signal, connected to PD07 of the device control module) and Boost-Ctrl (discharging control signal, connected to PA15 of the device control module). The output terminals BAT+ / OUT of the automotive battery also supply power to the power input terminal VC+ of the device control module through diode D6.

[0044] The operation of the charging and starting control module includes: In charging mode, when the device control module detects that there is an external voltage input to the charging input module and the voltage of the car battery connected to the output connection module is low (e.g., less than the first threshold), it controls CH-Ctrl to output a high level, turns on MOSFET Q1, and CH-OUT+ charges the car battery through BAT+ / OUT. The MCU adjusts the duty cycle of the four PWM signals HG1, HG2, LG1, and LG2 in the voltage conversion module in real time through voltage and current detection to limit the charging current (to avoid battery surge). In starting mode, if the car battery voltage is insufficient (e.g., less than the third threshold) when the car starts, Boost-Ctrl outputs a high level, turns on MOSFET Q7, turns on relay K1, and the supercapacitor discharges to the OUT+ terminal through C1+, connected in parallel with the car battery, and outputs a large current through BAT+ / OUT (to meet the requirements of the car starting system). In standby mode: when there is no charging / starting requirement, the device control module controls CH-Ctrl / Boost-Ctrl to be low, and MOSFET Q1 is turned off to avoid leakage of the car battery. Relay K1 is a discharge relay switch. Through the charging control, the various MOSFETs and relay K1 are controlled to ensure fast response during charging and starting.

[0045] Figure 8This is a circuit diagram of a device control module according to an embodiment of this application. The device control module, as the core decision-making center, receives detection and feedback signals from other modules, outputs control commands, coordinates the operation of the emergency start-up power supply, and realizes fault protection and mode switching. The device control module can be implemented using an MCU. The detection and feedback signal inputs of the device control module include: power status: CH_AD (from the charging input module), OUT_AD (from the output connection module); current status: CSP1 / CSN1 (output current of the voltage conversion module), CSP2 / CSN2 (charging and discharging current of the supercapacitor module); operation commands: SW1_AD (input to PA10 pin), SW2_AD (input to PB06 pin, from the button input of the operation and display module).

[0046] The control signals output by the device control module include: voltage conversion control signals: HG1 / LG1 / HG2 / LG2 (used to control the buck-boost process of the voltage conversion module); charging and discharging: CH-Ctrl / Boost-Ctrl (used to control the working mode of the charging and startup control module); human-machine interaction: BELL (output from PB03 pin to the buzzer in the operation and display module), LED4-Ctrl (output from PC15 pin to the LED in the operation and display module). The device control module also includes device management pins: NRST pin (PB12 pin) for device reset, BOOTO pin (PB07 pin) for selecting the program startup mode, and SWDIO / SWCLK pins (PC07 / PD01 pins) for program debugging. The device control module also has fault protection functions. When overcurrent is detected by CSP1 / CSN1 or CSP2 / CSN2 signals, overvoltage is detected by OUT_AD signal, or supercapacitor imbalance is detected by the equalization chip, the output of the voltage conversion module and the charging and startup control module is immediately shut down, and the buzzer of the operation and display module is activated simultaneously.

[0047] Figure 9This is a circuit diagram of an operation and display module according to an embodiment of this application. The operation and display module is used to realize user operation input, device status display, and fault alarm. The operation unit of the operation and display module includes: SW1 and SW2 buttons (which output SW1_AD and SW2_AD signals to the device control module respectively). The user can trigger functions such as "force start" and "charging pause". The device control module recognizes the button commands through AD sampling. The display unit of the operation and display module includes: LED1~LED6 (powered by 5VDC) controlled by the device control module. Their indication functions are, for example: LED1 is on: the charging input module has an external voltage input; LED5-G (green) is on: the car battery has sufficient power (e.g., greater than the second threshold); LED6-R (red) is on: the car battery has low power (e.g., less than the first threshold); LED4 is on: the supercapacitor is charging complete. The operation and display module also includes: an alarm unit, such as a BELL buzzer (controlled by the PB03 pin of the device control module). In case of a fault (overcurrent / overvoltage), the device control module outputs a high level on the PB03 pin to drive the buzzer to sound; a current limiting protection unit: resistors such as R29, R32, and R56 limit the LED / buzzer current, and MOSFET Q13 enhances the LED driving capability (to avoid insufficient brightness).

[0048] like Figure 10 As shown in the illustration, this application also provides a control method for an automotive emergency jump starter device, employing the aforementioned automotive emergency jump starter device. The method includes: S100: When the charging input module receives an external input power supply, the device control module determines that an external input power supply has been connected based on the input voltage detection signal of the charging input module; S200: When the device control module determines that the battery charging requirements are met based on the battery voltage detection signal from the output connection module, it enters the charging mode. The device control module outputs a voltage conversion control signal to the voltage conversion module based on the matching result between the input voltage detection signal from the charging input module and the target voltage, and outputs a charging control signal to the charging and start control module. S300: The voltage conversion module responds to the voltage conversion control signal to boost or buck the external input voltage and outputs it to the charging and starting control module; the charging and starting control module responds to the charging control signal to control the conduction of the path for charging the car battery based on the external input voltage, and charges the car battery and supercapacitor based on the external input power. S400: When the device control module determines that the battery voltage is greater than or equal to the preset start-up requirement voltage based on the battery voltage detection signal of the output connection module, it allows entry into the start-up mode. In the start-up mode, it outputs a discharge control signal. The preset start-up requirement voltage is less than the full charge voltage of the car battery. S500: The charging and starting control module responds to the discharge control signal and controls the discharge path from the supercapacitor to the output connection module to be turned on, so that the supercapacitor and the charged car battery work together to discharge to the car starting system.

[0049] This invention provides a car emergency jump starter device that supports USB external power input. A voltage conversion module can boost or buck the externally input DC voltage to a voltage suitable for charging the car battery. In charging mode, it can replenish the car battery and charge the supercapacitor using the external power input. By charging the depleted car battery, it provides energy replenishment and improves the car battery's starting performance. In starting mode, the recharged car battery can start with the assistance of the supercapacitor, increasing the success rate of starting the car using this emergency jump starter and enhancing user confidence. Each step of this method can be implemented using the functional implementation of the modules in the aforementioned car emergency jump starter device. This application uses a voltage conversion module to boost or buck the external input voltage, enabling all external input voltages to be converted to the target voltage required for charging, thus adapting to a wider range of external power sources.

[0050] The order of steps in the above control method is for illustrative purposes only. The activation of charging mode, standby mode, and startup mode does not need to follow a specific order; the device control module can determine which operating mode to use based on the current external input status and the vehicle battery status.

[0051] The following uses charging standby Taking startup as an example, let me illustrate the complete process of a typical operating condition: 1. Charging Stage: The charging input module connects to the AC-DC power supply → The charging input module transmits CH-VIN to the voltage conversion module → The device control module detects the external input voltage value through the CH_AD signal → Controls the voltage conversion module to boost or buck the voltage (e.g., if the AC-DC output is 19V and the target voltage is 14.4V, then buck processing is performed) → The voltage conversion module outputs CH-OUT+ to the charging and start-up control module → The device control module detects that the car battery voltage is low through the OUT_AD signal → Controls CH-Ctrl to turn on the MOSFET Q1 → Charges the car battery, while the supercapacitor charges synchronously (equalization protection is achieved through equalization chips IC1 / IC4) → Controls LED1 to light up (indicating that an external power input is connected) and controls LED5-G to flash (indicating that charging is currently in progress); 2. Standby stage: The charging output module disconnects the external input power supply → The device control module detects no external voltage input through the CH_AD signal → The control voltage conversion module is turned off → The CH-Ctrl / Boost-Ctrl is controlled to be low level → The MOS transistor Q1 of the charging and start-up control module is turned off → The car battery is in standby mode and can supply power to a small load through OUT+ → The control LED1 is turned off and the control LED5-G is kept on (indicating that the car battery has sufficient power). 3. Start-up Phase: After the conditions for entering the start-up mode are met (battery voltage is greater than or equal to the preset start-up voltage), a start-up permission signal is issued. The user presses the start button → the button signal SW1_AD (external start signal) is transmitted to the device control module → the device control module detects that the car battery voltage is slightly low → controls Boost-Ctrl to a high level → the supercapacitor discharges through the charging and start-up control module → the supercapacitor and the car battery are connected in parallel to output a large current → the starter motor works → after successful start-up, the device control module turns off Boost-Ctrl → controls LED6-R to turn off and the BELL to stop beeping (no fault).

[0052] The following two example scenarios illustrate the working principle of this car emergency jump starter device.

[0053] Scenario 1: Outdoor self-driving camping: USB power bank replenishes supercapacitors and car batteries.

[0054] Scenario: When a car owner is camping, the car battery may not be able to meet the starting requirements due to the power consumption of the camping lights being on for a long time (e.g., the battery voltage drops to 11.2V, below the 12V standard). Since there is no mains power at the campsite, a 20000mAh USB power bank that is carried with the owner is needed to replenish the supercapacitor and the car battery to ensure that the car can start later.

[0055] The implementation process includes: 1. Energy Input and Filtering (Prioritized by the Charging Input Module) When the car owner plugs the USB power bank into the "USB / OUT+" interface of the charging input module, the voltage is filtered out by electrolytic capacitors C3 and C5 in the charging input module to remove the ripple of the USB power bank output (to avoid voltage fluctuations damaging the subsequent circuits), and then passes through resistors R17 and R18 (voltage divider and current limiter to form a stable CH-VIN signal). Meanwhile, the CH_AD detection terminal of the charging input module (connected to the PA08 pin of the device control module) collects the voltage signal after voltage division and feeds it back to the device control module. The device control module determines that "a valid USB input exists" and triggers the charging mode.

[0056] 2. Voltage boost conversion (primarily driven by voltage conversion module)

[0057] The device control module detects the battery voltage via OUT_AD (OUT-BATTERY-VIN, which is connected to the car battery), and if the supercapacitor voltage is less than 10V (below the 10V target value), the USB voltage needs to be automatically adjusted in real time to charge the battery and capacitor. The device control module outputs HG1 (PC06 pin) high level and LG1 (PC05 pin) low level to control the MOSFETs Q2 and Q5 of the voltage conversion module to turn on and enter the boost mode: the inductor L1 stores the electrical energy input from the USB interface, and continuously boosts the voltage by periodically turning on / off the MOSFET Q2, and outputs it through CH-OUT+; During this period, the voltage conversion module's CSP1 (positive current sampling terminal) and CSN1 (negative current sampling terminal) collect the output current and feed it back to the device control module. The device control module stabilizes the current within a safe range by adjusting the duty cycle of the MOSFET Q2.

[0058] 3. Charge and discharge distribution (dominated by the charging and startup control module)

[0059] The device control module outputs a high level CH-Ctrl (PD07 pin) to control the MOSFET Q1 of the charging and start-up control module to turn on. The voltage conversion module outputs voltage to charge the car battery and supercapacitor simultaneously through the BAT+ / OUT interface and the C5+ interface. The VC+ detection terminal of the charging and starting control module (connected to the device control module) collects the charging voltage in real time and feeds it back to the device control module to ensure that the vehicle battery voltage and capacitor voltage remain within a safe range.

[0060] 4. Equalization and Status Feedback (Supercapacitor Module Leads, Operation and Display Modules Assist)

[0061] When the supercapacitor in the supercapacitor module is charging, voltage detection resistors such as R34 and R35 collect the voltage of each capacitor (CS1~CS5). When the voltage of a capacitor exceeds the upper limit of a single capacitor, IC1 controls the MOSFET Q8 to turn on, and releases the excess energy through the equalization resistor R21 to avoid overvoltage damage to the capacitor. LED1 (red) of the operation and display module is lit by the control signal output by the device control module (indicating "charging in progress"), and LED4 (green) is lit when the capacitor voltage reaches 14.6V (indicating "supercapacitor fully charged"). The vehicle owner can intuitively judge the charging progress through the LED status.

[0062] 5. Charging Results

[0063] When the car battery voltage rises to 12V (the preset starting voltage), the device control module detects that the battery voltage meets the standard via the OUT_AD signal, allowing entry into the starting mode. The panel indicator lights then prompt the user that the car can be started at any time. When the car battery voltage rises to the upper limit of 14.6V, the CH-Ctrl switch controlling the charging and starting module goes low, the MOSFET Q1 turns off, and charging stops; this provides backup energy for starting at any time.

[0064] Scenario 2: Long-distance freight transport, using a 5-40 VDC vehicle power supply to provide emergency charging for the car battery.

[0065] Scenario: During a long-distance transport, a truck experiences a generator failure, causing the vehicle's battery voltage to drop to 10.5V (unable to support nighttime driving lights, GPS, and other loads). The driver uses the truck's onboard 5-40VDC auxiliary power supply (outputting 24V) to recharge the supercapacitor and vehicle battery, ensuring continued driving safety.

[0066] The implementation process is as follows: 1. Wide voltage input and buck conversion (mainly driven by charging input module and voltage conversion module) The driver connects the 24V vehicle power supply to the “5-40VDC-VIN” interface of the charging input module. After the external input voltage is filtered by capacitors C3 and C5 of the charging input module, it forms CH-VIN (24V). CH_AD is fed back to the device control module. The device control module determines that “the external input voltage is higher than the battery charging voltage (14.6V)” and triggers the voltage conversion module’s step-down process. The device control module outputs HG2 (PC07 pin) high level and LG2 (PD06 pin) low level, controlling the MOSFET Q6 of the voltage conversion module to conduct and enter buck mode: by adjusting the duty cycle of MOSFET Q6, 24V is reduced to 14.6V and output through CH-OUT+; Resistors R6 and R9 in the voltage conversion module limit the gate current of MOSFET Q6 to prevent excessive gate current from damaging the MOSFET. At the same time, CSP1 / CSN1 collects the output current to ensure that it matches the maximum capacity of the vehicle power supply load.

[0067] 2. Battery charging and load power supply (mainly driven by charging and startup control module and output connection module)

[0068] When the device control module controls the charging and start-up control module to a high level (CH-Ctrl), the MOSFET Q1 is turned on, and 14.6V is used to charge the car battery through BAT+ / OUT. At the same time, the car battery supplies power to the truck's daytime lights and GPS through the OUT+ interface. The VC+ detection terminal of the charging and start-up control module collects the battery voltage in real time. When the battery voltage rises to 14.6V (fully charged state), the device control module controls CH-Ctrl to go low level, turns off MOSFET Q1, stops charging, and avoids overcharging of the battery.

[0069] 3. Status display and follow-up support (assisted by operation and display modules)

[0070] During charging, LED1 (red) on the operation and display module is lit (indicating "charging"), and LED5-G (green) flashes (indicating "battery not fully charged"); once fully charged, LED1 turns off, and LED5-G remains lit (indicating "battery fully charged"). After charging is complete, the car battery voltage stabilizes at 14.6V, which can support the subsequent load power supply of the truck, giving the driver time to find a repair shop and avoiding driving risks caused by power outages.

[0071] The parameter values ​​listed in the two scenarios above are merely examples and are not intended to limit the scope of protection of this application. In practical applications, the values ​​of each parameter can be selected according to the actual application scenario. The core commonalities of the two scenarios and the advantages of the equipment are as follows: all scenarios use the equipment control module as the central hub, the charging input module that supports multiple input paths as the energy input, the voltage conversion module (voltage adaptation) as the conversion core, the charging and start-up control module (charge and discharge control) as the distribution hub, the supercapacitor module (supercapacitor) as the emergency energy carrier, and the operation and display module (human-machine interaction) as the status feedback window; key components such as MOSFETs Q2 / Q5 / Q6 realize voltage conversion, equalization chips IC1 / IC4 ensure capacitor safety, and CSP / CSN (current sampling) avoid overcurrent, ultimately meeting the requirements of scenario adaptation, safety and reliability, and convenient and efficient charging and start-up.

[0072] In summary, the automotive emergency jump starter device and its control method described in this application have the following beneficial effects: 1. This application, through its multi-module collaborative and intelligent control circuit design, perfectly meets the core needs of car owners for outdoor energy replenishment and car battery recovery, demonstrating significant practicality and benefit advantages in actual applications.

[0073] 2. This device simultaneously replenishes depleted car batteries through multiple pathways and energy sources. It not only provides energy to the battery and improves its starting performance, but also achieves multi-path automatic energy replenishment control. It utilizes the combined energy from external power sources and the instantaneous discharge capacity of the supercapacitor to assist in starting the car battery. From an outdoor charging convenience perspective, the device relies on a charging input module compatible with various external power sources, supporting AC-DC adapters, USB power banks, and 5-40VDC wide-voltage power supplies. Car owners do not need to rely on fixed mains power. Whether it's portable charging during road trips and camping, temporary charging during long-distance transport, or rapid power supply in outdoor emergency scenarios, energy input can be completed through the device. The voltage conversion module uses step-up / step-down processing to adapt the voltage, and the charging and starting control modules precisely distribute power. This efficiently replenishes the supercapacitor (with a balancing circuit ensuring the supercapacitor's safety and durability) and slowly charges the depleted car battery, completely solving the pain point of traditional starting devices being unable to charge outdoors, and achieving a flexible charging experience anytime, anywhere. The device is compatible with external power input interfaces including a standard USB input interface, a USB TYPE-C input interface compatible with QC, PD, PPS and other fast charging functions, and can also be equipped with a 2.1 DC interface, a cigarette lighter input interface, and is also compatible with a variety of commonly used solar power connectors.

[0074] 3. When an external power source is connected, the device control module automatically determines the charge status of the supercapacitor bank and the car battery. When additional power is needed, the control module first checks the car battery voltage signal at the output clip and whether an external power source is connected. If the connection is correct and the car voltage is within a safe charging range, the supercapacitor bank and the car battery are charged simultaneously. Other energy sources carried by the user can be used to charge the car battery and supercapacitor in real time via the internal control circuit. During car startup, multiple power sources, including the external charging power source, the supercapacitor bank, and the charged car battery, can simultaneously provide power to the car starting system, improving the success rate of starting the car. This device not only automatically identifies the charging input power signal but also monitors the output signal in real time, implementing fully automatic voltage boost / buck and power control based on whether the power source is internal (supercapacitor bank) or external (car battery), ensuring the safety of the charging and discharging equipment.

[0075] 4. From the perspective of car start-up reliability, the equipment addresses the challenge of starting cars with a dead battery by employing a collaborative power supply mechanism consisting of an external power source, a supercapacitor, and the car battery. When a car cannot start due to a dead battery, the equipment's control module responds quickly, switching to start-up mode via the charging and starting control module. The supercapacitor, with its instantaneous high-current output characteristics (providing over 100A of starting current), connects in parallel with the car battery and external power input to deliver sufficient power to the car starting system. Compared to traditional starting methods that rely solely on the battery, this solution not only compensates for the insufficient discharge capacity of a dead battery but also significantly improves the success rate of car start-up rescue under extreme conditions such as low temperatures and battery degradation due to the stable discharge performance of the supercapacitor. Furthermore, during the starting process, the equipment control module monitors the current and voltage status in real time to prevent overcurrent surges, ensuring starting safety and reducing damage to the car battery and starting system.

[0076] 5. From the perspective of intelligent safety and long-term benefits, the equipment, through closed-loop control of the equipment control module (overcurrent, overvoltage, and capacitor equalization detection) and status feedback from the operation and display modules, allows car owners to intuitively monitor the charging progress and the power level of the car battery / supercapacitor (e.g., LED1 lit indicates charging, LED5-G lit indicates the battery is fully charged). Operation is convenient and risks are controllable. Simultaneously, the equalization circuit of the supercapacitor module (IC1 / IC4 chips) and the charging current limiting protection of the output connection module (duty cycle adjustment of the charging and start-up control module) effectively extend the lifespan of the supercapacitor and car battery, reducing equipment replacement costs. For car owners, this not only reduces the time and economic costs of waiting for roadside assistance when the battery is low, but also provides a sense of security for emergency starting and stress-free outdoor charging. This is especially beneficial for users who frequently drive outdoors, engage in long-distance transportation, or use older vehicles, providing a safety redundancy tool that significantly improves the flexibility and reliability of vehicle use.

[0077] 6. This device can transform ordinary energy storage battery devices into those with starting capabilities, expanding the functionality of portable energy storage power supplies and reducing costs. Furthermore, its compatibility with multiple energy sources simplifies the design of portable power supplies. For example, when designed for outdoor use, it only needs a standard, long-term power output path for charging car batteries, eliminating the need for high-current paths for car starting and matching starting clips, cables, or other components or accessories.

[0078] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of this application and should not be construed as limiting the specific implementation of this application to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of this application, and all such modifications or substitutions should be considered within the scope of protection of this application.

Claims

1. A car emergency jump starter device, characterized in that, include: A charging input module is configured to connect to an external input power source and receive an external input voltage. The charging input module includes at least one USB external DC power input interface. A voltage conversion module is configured to boost or buck the external input voltage input to the charging input module and convert it into a voltage suitable for charging the vehicle battery; Supercapacitor module, including supercapacitors; The output connection module is configured to be electrically connected to the car battery. The device control module is configured to output working control signals based on the current working mode, which is either charging mode or start-up mode. The charging and starting control module is configured to, in response to the operating control signal, control the conduction of the path for charging the vehicle battery based on the external input voltage in charging mode, and charge the vehicle battery and the supercapacitor based on the external input voltage; and control the conduction of the discharge path from the supercapacitor to the output connection module in starting mode, so that the supercapacitor and the charged vehicle battery cooperate to discharge to the vehicle starting system.

2. The automotive emergency jump starter device according to claim 1, characterized in that, The device control module is further configured to output a voltage conversion control signal based on the matching result between the input voltage detection signal of the charging input module and the target voltage; the voltage conversion module is configured to respond to the voltage conversion control signal and, when the external input power supply does not match the target voltage, perform boost or buck conversion on the external input voltage and output it to the charging and start-up control module.

3. The automotive emergency jump starter device according to claim 2, characterized in that, The working control signal includes a charging control signal and a start control signal, and the charging and start control module includes a charging control switch and a start control switch; The charging control switch responds to the charging control signal to control the conduction of the path for charging the vehicle battery based on the external input voltage, and the device control module controls the charging current by controlling the duty cycle of the voltage conversion control signal. The start control switch responds to the start control signal to control the discharge path from the supercapacitor to the output connection module to be turned on.

4. The automotive emergency jump starter device according to claim 1, characterized in that, The charging and starting control module is also configured to, in response to the operating control signal, control the activation of the path for charging the vehicle battery based on the external input voltage in the starting mode.

5. The automotive emergency jump starter device according to claim 1, characterized in that, The device control module is configured to obtain an input voltage detection signal from the charging input module and a battery voltage detection signal from the output connection module. When it is determined that an external power source is currently connected based on the input voltage detection signal and the battery charging requirements are met based on the battery voltage detection signal, the module enters the charging mode. When the battery charging requirements are met based on the battery voltage detection signal, the module exits the charging mode.

6. The automotive emergency jump starter device according to claim 1, characterized in that, The device control module is also configured to allow entry into the start-up mode when the battery voltage is greater than or equal to a preset start-up requirement voltage based on the battery voltage detection signal of the output connection module, wherein the preset start-up requirement voltage is less than the full charge voltage of the car battery.

7. The automotive emergency jump starter device according to claim 1, characterized in that, The supercapacitor module includes multiple supercapacitors and a charging equalization circuit. The charging equalization circuit is configured to detect the voltage of each supercapacitor and release the supercapacitor to release energy when the voltage of the supercapacitor is higher than a preset capacitance threshold.

8. The automotive emergency jump starter device according to claim 1, characterized in that, The control module is also configured to acquire the voltage detection signal of the vehicle battery in standby mode when the output connection module is connected to a load.

9. The automotive emergency jump starter device according to claim 1, characterized in that, The USB external DC power input interface includes a USB-A interface and / or a USB Type-C interface, and the USB external DC power input interface supports at least one of the following protocols: USB PD protocol, QC protocol, UFCS converged fast charging protocol, VOOC protocol, SCP protocol, AFC protocol, and PE protocol.

10. The automotive emergency jump starter device according to claim 1, characterized in that, The voltage conversion module includes a DC-DC buck-boost circuit.

11. A control method for an automotive emergency jump starter device, characterized in that, The method using the automotive emergency jump starter device according to any one of claims 1 to 10 includes: When the charging input module receives an external input power source, the device control module determines that an external input power source is currently connected based on the input voltage detection signal of the charging input module. When the device control module determines that the battery charging requirements are met based on the battery voltage detection signal from the output connection module, it enters the charging mode. The device control module outputs a voltage conversion control signal to the voltage conversion module based on the matching result between the input voltage detection signal from the charging input module and the target voltage, and outputs a charging control signal to the charging and start control module. The voltage conversion module responds to the voltage conversion control signal by boosting or bucking the external input voltage and then outputs it to the charging and starting control module; the charging and starting control module responds to the charging control signal by controlling the path for charging the car battery based on the external input voltage and charging the car battery and the supercapacitor based on the external input power. When the battery voltage is greater than or equal to the preset start-up requirement voltage according to the battery voltage detection signal of the output connection module, the device control module allows the device to enter the start-up mode. In the start-up mode, the device outputs a discharge control signal. The preset start-up requirement voltage is less than the full charge voltage of the car battery. The charging and starting control module responds to the discharge control signal by controlling the discharge path from the supercapacitor to the output connection module to be turned on, so that the supercapacitor and the charged car battery work together to discharge to the car starting system.

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