Automobile, starting system and starting method thereof and computer program product

Abstract

The invention discloses an automobile, a starting system and method thereof and a computer program product, and the method comprises the steps: prompting a user to access an external power supply when a power battery of the automobile is detected to have a power supply failure fault; when it is detected that the external power source is connected, the vehicle-mounted charger is switched into an emergency starting mode, and the external power source is converted into set direct-current voltage; the generator is switched to work in an inversion mode, and the converted direct-current voltage is used for starting the engine; after the engine is started, the generator is switched into a power generation mode to work, and kinetic energy of the engine is converted into electric energy; and the direct current-direct current converter is started to work, and electric energy generated by the generator is converted into a vehicle-mounted direct current power supply to supply power to a low-voltage load of the whole vehicle. The problem that the vehicle cannot be started due to the power supply fault of the power battery is solved, the emergency vehicle using requirement of a user when the power battery fault is not repaired in time can be met, and the convenience and safety of user travel are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of automobiles, and in particular to an automobile, a starting system and a starting method thereof, and a computer program product. Background Art

[0002] In the power system of plug-in hybrid and extended-range electric vehicles, the operating principle involves the coordinated work of multiple key components such as power batteries, generators, engines, DCDC converters and drive motors. Specifically, at the initial start of the vehicle, the power battery needs to power the generator, and the generator starts working to drive the engine to start. After the engine is started, on the one hand, it can directly drive the vehicle to travel, and on the other hand, the engine drives the generator to work through operation, and the generator transmits the generated electrical energy to the corresponding system. Among them, part of the electrical energy is converted into 12V voltage by the DCDC converter to power the low-voltage load of the whole vehicle and ensure the normal operation of various low-voltage electrical equipment in the vehicle; at the same time, some of the electrical energy can drive the motor to work, further assisting the vehicle to travel, and can charge the power battery to maintain the energy balance of the entire power system.

[0003] However, in actual operation, when there is a fault such as a damaged power battery relay or a damaged battery pack, the power battery will not be able to supply power to the generator normally. Since the generator loses power supply, the engine cannot be started, which in turn causes the vehicle to be unable to start. This fault condition will cause the vehicle to lose its ability to drive, and the vehicle can only be towed to a repair shop for repair, which not only requires the replacement of damaged parts, but also brings great inconvenience to the user and incurs high repair costs. This problem of the vehicle being unable to start due to the failure of key components urgently needs to be solved effectively at the technical level. Summary of the invention

[0004] The technical problem to be solved by the embodiments of the present invention is to provide an automobile and a starting system and starting method thereof, and a computer program product, so as to enable the vehicle to be started even when a power battery fails, thereby improving the convenience and safety of vehicle use.

[0005] In order to solve the above technical problems, the present invention provides a method for starting a car, comprising the following steps:

[0006] When it is detected that the car's power battery is unable to supply power, the user is prompted to connect to an external power source;

[0007] When the external power supply is detected, the on-board charger switches to the emergency start mode and converts the external power supply into the set DC voltage;

[0008] The generator switches to inverter mode and uses the converted DC voltage to start the engine;

[0009] After the engine is started, the generator switches to power generation mode to convert the engine's kinetic energy into electrical energy;

[0010] The DC-DC converter starts working and converts the electric energy generated by the generator into an on-board DC power supply to power the low-voltage loads of the entire vehicle.

[0011] Preferably, after the car is started, the method further includes: prompting the user to remove the external power connection.

[0012] Preferably, after the car is started, the process also includes: limiting the power of the engine and the drive motor and the vehicle speed, and prompting the user that the power battery needs maintenance.

[0013] Preferably, the method of prompting the user is to give a text prompt through a vehicle-mounted display screen, or to give a voice prompt through a vehicle-mounted speaker.

[0014] Preferably, the external power source is any one of household mains electricity, a charging pile, and a vehicle with a discharge function.

[0015] The present invention also provides an automobile starting system, comprising: a control unit, a DC-DC converter, a prompt unit respectively connected to the control unit for communication, an on-board charger and a generator, wherein the on-board charger, the generator and the DC-DC converter are respectively electrically connected to the power battery;

[0016] The prompting unit is used to prompt the user to connect to an external power source according to the control instruction sent by the control unit when it is detected that the power battery of the vehicle has a power failure;

[0017] The on-board charger is used to switch to the emergency start mode according to the control command sent by the control unit after detecting that the external power supply is connected, and convert the external power supply into a set DC voltage;

[0018] The generator is used to work in an inverter mode according to the control instruction sent by the control unit, and use the converted DC voltage to start the engine; and switch to a power generation mode after the engine is started to convert the kinetic energy of the engine into electrical energy;

[0019] The DC-DC converter is used to convert the electric energy generated by the generator into a vehicle-mounted DC power supply to supply power to the low-voltage load of the vehicle;

[0020] The control unit is used to send corresponding control instructions.

[0021] Preferably, the prompting unit is also used to prompt the user to remove the external power connection according to the control instruction sent by the control unit after the car is started.

[0022] Preferably, the control unit is also used to limit the power of the engine and the drive motor and the vehicle speed after the car is started, and the prompt unit is also used to prompt the user that the power battery needs maintenance according to the control instruction sent by the control unit.

[0023] The invention also provides a car, comprising the car starting system.

[0024] The present invention also provides a computer program product, comprising computer instructions, wherein the computer instructions instruct a computer device to execute operations corresponding to the method.

[0025] The implementation of the present invention has the following beneficial effects: it can effectively realize emergency starting of the vehicle when the power battery fails and the vehicle cannot be started, allowing the user to drive the vehicle to a maintenance service station for repair under certain restrictions, avoiding the situation where the vehicle cannot be started and requires towing or rescue, saving the user's time and energy, and reducing the user's vehicle use costs. At the same time, it also meets the user's emergency vehicle needs when the power battery fails and is not repaired in time, greatly improving the convenience and safety of the user's travel. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 The present invention is a flowchart of a method for starting a car according to an embodiment of the present invention.

[0028] Figure 2 The figure is a schematic diagram of a specific flow of a method for starting a car according to an embodiment of the present invention.

[0029] Figure 3 It is a structural schematic diagram of a vehicle starting system according to a second embodiment of the present invention. DETAILED DESCRIPTION

[0030] The following descriptions of the embodiments refer to the accompanying drawings to illustrate specific embodiments in which the present invention may be implemented.

[0031] Please refer to Figure 1 As shown, the first embodiment of the present invention provides a method for starting a car, comprising the following steps:

[0032] When it is detected that the car's power battery is unable to supply power, the user is prompted to connect to an external power source;

[0033] When the external power supply is detected, the on-board charger switches to the emergency start mode and converts the external power supply into the set DC voltage;

[0034] The generator switches to inverter mode and uses the converted DC voltage to start the engine;

[0035] After the engine is started, the generator switches to power generation mode to convert the engine's kinetic energy into electrical energy;

[0036] The DC-DC converter starts working and converts the electric energy generated by the generator into an on-board DC power supply to power the low-voltage loads of the entire vehicle.

[0037] Through the above steps, it can be known that the present invention solves the problem that the vehicle cannot be started due to a power battery power supply failure, can meet the user's emergency vehicle needs when the power battery failure is not repaired in time, and greatly improves the convenience and safety of the user's travel.

[0038] Specifically, please combine Figure 2 As shown, the embodiment of the present invention provides a solution for emergency starting of a vehicle when the vehicle cannot be started due to a power battery failure. The specific process is as follows:

[0039] (I) Fault monitoring and prompting

[0040] When the vehicle is started, the power battery monitoring module starts working and conducts a comprehensive inspection of the power battery. Once it is found that the power battery cannot supply power, for example, by detecting the abnormal voltage and current of the power battery or the abnormal state of the relay, the power battery monitoring module sends a fault signal to the control unit. After receiving the fault signal, the control unit immediately sends an instruction to the prompt unit. The prompt unit can be a device such as a display screen or a speaker built into the vehicle. If the prompt unit is a display screen, the vehicle control unit will send an instruction containing prompt text content (such as "Power battery failure, please connect to 220V power supply to start the vehicle"), and the display screen will display the text information; if the prompt unit is a speaker, the control unit will send a voice prompt content (such as "Power battery failure, please connect to 220V power supply to start the vehicle" synthesized by speech synthesis technology), and the speaker will play the voice prompt to remind the user that an external 220V power supply is needed to start the vehicle.

[0041] (II) 220V power supply access and on-board charger OBC operation

[0042] After receiving the prompt, the user connects to the external 220V power supply. The power connection detection module monitors the power connection status in real time. When it detects that the 220V power supply is connected, the power connection detection module sends a connection signal to the control unit. After receiving the connection signal, the control unit sends a switching command to the on-board charger OBC, and the OBC switches to the emergency start mode. In the emergency start mode, the rectification, boost and other circuits inside the OBC start working, converting the connected 220V AC power into a set DC voltage suitable for the generator. For example, the OBC can convert a 220V AC power supply into a DC voltage of about 300V-400V. The specific converted DC voltage value depends on the working requirements of the vehicle generator.

[0043] (III) Generator operation and engine starting

[0044] After the OBC provides the converted DC voltage to the generator, the control unit simultaneously sends a command to the generator to switch the generator to the inverter mode. In the inverter mode, the generator uses the DC voltage provided by the OBC to generate three-phase AC power, and the frequency, amplitude and other parameters of the three-phase AC power meet the engine starting requirements. The three-phase AC power generated by the generator drives the engine to start. After the engine starts, the control unit sends a command to the generator again to switch the generator to the power generation mode. In the power generation mode, the generator converts the kinetic energy generated by the engine into electrical energy through the principle of electromagnetic induction. At this time, the electrical energy output by the generator can be used to power the subsequent low-voltage loads of the vehicle and for vehicle driving.

[0045] (IV) Vehicle low-voltage load power supply and vehicle start-up completion

[0046] After the generator enters the power generation mode, it generates electricity, and the control unit starts the DCDC operation. DCDC converts the higher voltage electricity generated by the generator into a 12V power supply through its internal step-down circuit and other components. For example, if the generator output voltage is 300V, DCDC will step it down to 12V. DCDC provides 12V power to the low-voltage loads of the entire vehicle, including but not limited to the vehicle's lighting system, instrument panel, on-board computer and other equipment, to ensure that these devices can work normally. After DCDC successfully supplies power to the low-voltage loads of the entire vehicle, the vehicle control unit prompts the unit to send a command to prompt the user to remove the 220V power connection. After the user removes the 220V power connection, the vehicle completes the emergency start.

[0047] It should also be noted that after the vehicle is started, since it is started by emergency start, the control unit limits the power of the engine and the drive motor. For example, under normal circumstances, the maximum power of the engine may be 100kW, and after emergency start, the maximum power of the engine is limited to 30kW-50kW; the power of the drive motor is also limited accordingly. At the same time, the control unit limits the vehicle's driving speed, such as limiting the maximum driving speed to between 30km / h-50km / h. In addition, the control unit again prompts the user through the prompt unit that there is a fault in the power battery and it needs to be repaired. The prompt method is as mentioned above, which can be text displayed on the display or voice played by the speaker.

[0048] In the embodiment of the present invention, the external 220V power supply can be from a variety of sources. For example, household mains electricity is the most common source, and the user can use the power cord carried with the vehicle to connect the vehicle to the power socket at home; the charging pile is also a feasible 220V power source. In addition to the function of charging the power battery, some charging piles also have a discharge function, which can provide 220V power for emergency starting of the vehicle in this case. In addition, a vehicle with a discharge function can also be used as a 220V power source. The vehicle with a discharge function is connected to the hybrid vehicle through a dedicated connection device to obtain a 220V power supply to achieve emergency starting.

[0049] The automobile emergency starting method of the embodiment of the present invention has wide applicability, and is particularly applicable to automobiles equipped with power batteries. When a power supply failure occurs in the power battery, such as a damaged relay or battery pack, which causes the vehicle to be unable to start, the fault is detected by the detection module, and the prompt unit reminds the user to connect to an external 220V power supply. After that, the on-board charger, generator, DC-DC converter and other components work together to achieve emergency starting of the vehicle and enable driving under restricted conditions.

[0050] Please refer to Figure 3 As shown, corresponding to the vehicle starting method described in the first embodiment of the present invention, the second embodiment of the present invention further provides a vehicle starting system, including: a control unit 2, a DC-DC converter 7, a prompt unit 3, an on-board charger 6 and a generator 5 respectively connected to the control unit 2 for communication, and the on-board charger 6, the generator 5 and the DC-DC converter 7 are respectively electrically connected to the power battery 1;

[0051] The prompt unit 3 is used to prompt the user to connect to an external power source according to the control instruction sent by the control unit 2 when it is detected that the power battery of the vehicle is unable to supply power;

[0052] The on-board charger 6 is used to switch to the emergency start mode according to the control command sent by the control unit 2 after detecting that the external power supply is connected, and convert the external power supply into a set DC voltage;

[0053] The generator 5 is used to work in an inverter mode according to the control instruction sent by the control unit 2, and use the converted DC voltage to start the engine 4; and after the engine 4 is started, it switches to a power generation mode to convert the kinetic energy of the engine 4 into electrical energy;

[0054] The DC-DC converter 7 is used to convert the electric energy generated by the generator 5 into a vehicle-mounted DC power supply to supply power to the low-voltage load of the vehicle;

[0055] The control unit 2 is used to send corresponding control instructions.

[0056] Preferably, the prompting unit 3 is also used to prompt the user to remove the external power connection according to the control instruction sent by the control unit 2 after the car is started.

[0057] Preferably, the control unit 2 is also used to limit the power of the engine 4 and the drive motor 8 and the vehicle speed after the car is started, and the prompt unit 3 is also used to prompt the user that the power battery needs maintenance according to the control instruction sent by the control unit 2.

[0058] Corresponding to the automobile starting system described in the aforementioned second embodiment of the present invention, the third embodiment of the present invention further provides an automobile, comprising the automobile starting system.

[0059] Corresponding to the vehicle starting method described in the aforementioned first embodiment of the present invention, the fourth embodiment of the present invention further provides a computer program product, including computer instructions, wherein the computer instructions instruct a computer device to execute operations corresponding to the method.

[0060] Preferably, the computer device has a processor and a memory. The processor may be a central processing unit (CPU), or other general-purpose processors, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor, or the processor may be any conventional processor. The processor is the control center of the device, and various parts of the device are connected using various interfaces and lines.

[0061] The memory mainly includes a program storage area and a data storage area, wherein the program storage area can store an operating system, an application required for at least one function, etc., and the data storage area can store related data, etc. In addition, the memory can be a high-speed random access memory, or a non-volatile memory, such as a plug-in hard disk, a smart memory card (SmartMedia Card, SMC), a secure digital (Secure Digital, SD) card, and a flash card (Flash Card), etc., or the memory can also be other volatile solid-state storage devices.

[0062] When the computer device is running, the processor reads the computer instructions stored in the memory, and the computer instructions instruct the processor to perform the operation corresponding to the vehicle starting method, thereby realizing the corresponding function. In addition to the above-mentioned processor and memory, the computer device in the present invention may also include other components, which can be understood by those skilled in the art.

[0063] For the working principle and process of the above embodiment, please refer to the description of the above embodiment of the present invention, which will not be repeated here.

[0064] From the above description, it can be seen that compared with the prior art, the beneficial effects of the present invention are: it can effectively realize emergency starting of the vehicle when the power battery fails and the vehicle cannot be started, so that the user can drive the vehicle to a maintenance service station for repair under certain restrictions, avoiding the situation where the vehicle cannot be started and requires towing or rescue, saving the user's time and energy, and reducing the user's car use costs. At the same time, it also meets the user's emergency car needs when the power battery failure is not repaired in time, greatly improving the convenience and safety of the user's travel.

[0065] The above disclosure is only the preferred embodiment of the present invention, which certainly cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope of the present invention.

Claims

1. A method for starting a car, characterized in that: The following steps are involved: When it is detected that the car's power battery is unable to supply power, the user is prompted to connect to an external power source; When the external power supply is detected, the on-board charger switches to the emergency start mode and converts the external power supply into the set DC voltage; The generator switches to inverter mode and uses the converted DC voltage to start the engine; After the engine is started, the generator switches to power generation mode to convert the engine's kinetic energy into electrical energy; The DC-DC converter starts working and converts the electric energy generated by the generator into an on-board DC power supply to power the low-voltage loads of the entire vehicle.

2. The method according to claim 1, characterized in that After the car is started, it also includes: prompting the user to remove the external power connection.

3. The method according to claim 1, characterized in that After the car is started, it also includes: limiting the power of the engine and drive motor and the vehicle's speed, and reminding the user that the power battery needs maintenance.

4. The method according to any one of claims 1 to 3, characterized in that: The user is prompted by text prompts through the vehicle display screen or by voice prompts through the vehicle speakers.

5. The method according to any one of claims 1 to 3, characterized in that: The external power source is any one of household mains electricity, a charging pile, and a vehicle with a discharge function.

6. An automobile starting system, characterized in that: include: A control unit, a DC-DC converter, a prompt unit, an on-board charger and a generator respectively connected to the control unit in communication, wherein the on-board charger, the generator and the DC-DC converter are respectively electrically connected to the power battery; The prompting unit is used to prompt the user to connect to an external power source according to the control instruction sent by the control unit when it is detected that the power battery of the vehicle has a power failure; The on-board charger is used to switch to the emergency start mode according to the control command sent by the control unit after detecting that the external power supply is connected, and convert the external power supply into a set DC voltage; The generator is used to work in an inverter mode according to the control instruction sent by the control unit, and use the converted DC voltage to start the engine; and switch to a power generation mode after the engine is started to convert the kinetic energy of the engine into electrical energy; The DC-DC converter is used to convert the electric energy generated by the generator into a vehicle-mounted DC power supply to supply power to the low-voltage load of the vehicle; The control unit is used to send corresponding control instructions.

7. The method according to claim 6, characterized in that The prompting unit is also used to prompt the user to remove the external power connection according to the control instruction sent by the control unit after the car is started.

8. The system according to claim 6, characterized in that The control unit is also used to limit the power of the engine and the drive motor and the vehicle speed after the car is started. The prompt unit is also used to prompt the user that the power battery needs maintenance according to the control instruction sent by the control unit.

9. A car, characterized in that: Comprising the automobile starting system as claimed in claim 6.

10. A computer program product, characterized in that The method comprises computer instructions, wherein the computer instructions instruct a computer device to execute operations corresponding to the method according to any one of claims 1 to 5.

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