Vehicle insulation detection method and circuit, electronic equipment and vehicle

Abstract

The invention provides a vehicle insulation detection method and circuit, electronic equipment and a vehicle, and is applied to the technical field of vehicle detection.The method comprises the steps that in response to vehicle high-voltage power-on, insulation detection is conducted on a whole vehicle high-voltage loop through a first insulation detection module, and the insulation resistance value of the whole vehicle high-voltage loop is obtained; performing insulation detection on the fuel cell through a second insulation detection module in response to the condition that the insulation resistance value of the whole vehicle high-voltage loop is greater than or equal to a first preset resistance value to obtain the insulation resistance value of the fuel cell; and in response to the condition that the insulation resistance value of the fuel cell is greater than or equal to a second preset resistance value, determining a driving mode of the vehicle according to a received power source selection instruction. The method can accurately detect the insulation state of each part of the vehicle, improves the reliability and safety of the vehicle, and reduces the fault risk of the vehicle.

Description

Technical Field

[0001] The present application relates to the field of vehicle detection technology, and in particular to a vehicle insulation detection method, circuit, electronic equipment and vehicle. Background Art

[0002] New energy vehicles usually include a power battery and a fuel cell to provide the necessary driving energy. In this configuration, it is crucial to ensure the electrical safety of the system. Insulation monitoring is an important part of ensuring the safety of the electrical system. The existing technology cannot accurately detect the insulation status of various parts of the vehicle, which affects the reliability and safety of the system and increases the risk of vehicle failure. Summary of the invention

[0003] In view of this, the purpose of this application is to propose a vehicle insulation detection method, circuit, electronic equipment and vehicle to accurately detect the insulation status of various parts of the vehicle, improve the reliability and safety of the vehicle, and reduce the risk of vehicle failure.

[0004] Based on the above purpose, the present application provides a vehicle insulation detection method, comprising:

[0005] In response to the vehicle high voltage being powered on, the first insulation detection module performs insulation detection on the high voltage circuit of the whole vehicle to obtain the insulation resistance of the high voltage circuit of the whole vehicle; in response to the insulation resistance of the high voltage circuit of the whole vehicle being greater than or equal to the first preset resistance, the second insulation detection module performs insulation detection on the fuel cell to obtain the insulation resistance of the fuel cell;

[0006] In response to the insulation resistance of the fuel cell being greater than or equal to the second preset resistance, the driving mode of the vehicle is determined according to the received power source selection instruction.

[0007] Based on the same inventive concept, the present application also provides a vehicle insulation detection circuit, including: a power battery, a first insulation detection module, a first main positive switch, a first main negative switch, a vehicle load, a DC-DC converter, a second main positive switch, a second main negative switch, a second insulation detection module, and a fuel cell;

[0008] The first detection end of the first insulation detection module is connected to the positive electrode of the power battery, and the second detection end of the first insulation detection module is connected to the negative electrode of the power battery;

[0009] The first main positive switch is connected to the first detection end of the first insulation detection module, and the first main negative switch is connected to the second detection end of the first insulation detection module;

[0010] The first input terminal of the vehicle load is connected to the first main positive switch, and the first output terminal of the vehicle load is connected to the first main negative switch;

[0011] The first output terminal of the DC-DC converter is connected to the first input terminal of the vehicle load, and the first input terminal of the DC-DC converter is connected to the first output terminal of the vehicle load;

[0012] The second main positive switch is connected to the second input terminal of the DC-DC converter, and the second main negative switch is connected to the second output terminal of the DC-DC converter;

[0013] The first detection terminal of the second insulation detection module is connected to the second main positive switch, and the second detection terminal of the second insulation detection module is connected to the second main negative switch;

[0014] The positive electrode of the fuel cell is connected to the first detection end of the second insulation detection module, and the negative electrode of the fuel cell is connected to the second detection end of the second insulation detection module;

[0015] The DC-DC converter comprises a diode, the anode of the diode is connected to the first detection end of the first insulation detection module, and the cathode of the diode is connected to the first detection end of the second insulation detection module.

[0016] Based on the same inventive concept, the present application also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable by the processor, wherein the processor implements the method as described above when executing the computer program.

[0017] Based on the same inventive concept, the present application also provides a vehicle, which includes the above-mentioned electronic device.

[0018] It can be seen from the above that the present application provides a vehicle insulation detection method, circuit, electronic device and vehicle, wherein the method includes:

[0019] In response to the vehicle high voltage being powered on, the first insulation detection module is used to perform insulation detection on the high voltage circuit of the whole vehicle to obtain the insulation resistance of the high voltage circuit of the whole vehicle; in response to the insulation resistance of the high voltage circuit of the whole vehicle being greater than or equal to the first preset resistance, it is indicated that the insulation performance of the vehicle high voltage circuit of the whole vehicle meets the safety standards, and the fuel cell can be further insulation-tested through the second insulation detection module to obtain the insulation resistance of the fuel cell; in response to the insulation resistance of the fuel cell being greater than or equal to the second preset resistance, it is indicated that the insulation performance of the fuel cell meets the safety standards and there is no risk of current leakage, and the driving mode of the vehicle can be determined according to the received power source selection instruction; accurate detection of the insulation status of various parts of the vehicle by the first insulation detection module and the second insulation detection module can improve the reliability and safety of the vehicle and reduce the risk of vehicle failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the present application or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 This is a flow chart of a vehicle insulation detection method according to an embodiment of the present application;

[0022] Figure 2 This is a flow chart of a vehicle insulation detection method according to another embodiment of the present application;

[0023] Figure 3 This is a circuit diagram of a vehicle insulation detection circuit according to an embodiment of the present application;

[0024] Figure 4 A circuit diagram of a vehicle insulation detection circuit according to another embodiment of the present application;

[0025] Figure 5 A schematic diagram of a vehicle insulation detection device according to an embodiment of the present application;

[0026] Figure 6 A schematic diagram of the hardware structure of an electronic device provided in an embodiment of the present application;

[0027] Figure numerals: 1A, power battery, 2A, insulation detection module, 3A, first main positive switch, 4A, first main negative switch, 5A, vehicle load, 6A, DC-DC converter, 7A, second main positive switch, 8A, second main negative switch, 9A, fuel cell, 10A, diode, 11A, inductor, 12A, insulated gate bipolar transistor, 1B, power battery, 2B, first insulation detection module, 3B, first main positive switch, 4B, first main negative switch, 5B, vehicle load, 6B, DC-DC converter, 7B, second main positive switch, 8B, second main negative switch, 9B, second insulation detection module, 10B, fuel cell, 11B, diode, 12B, inductor, 13B, insulated gate bipolar transistor. DETAILED DESCRIPTION

[0028] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0029] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should be the usual meanings understood by people with ordinary skills in the field to which the present application belongs. The "first", "second" and similar words used in the embodiments of the present application do not represent any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing in front of the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0030] Among the related technologies, new energy vehicles have received extensive attention due to their environmentally friendly and efficient characteristics. New energy vehicles usually include a power battery and a fuel cell (such as a hydrogen fuel cell) to provide the necessary driving energy. In this configuration, it is crucial to ensure the electrical safety of the system, especially in a high-voltage environment. Insulation monitoring is an important part of ensuring the safety of the electrical system. It can detect the insulation status of the high-voltage system in real time to ensure that no electrical failure or personal safety accident will occur due to insulation failure.

[0031] In related technologies, such as Figure 3 As shown, the vehicle insulation detection circuit includes: a power battery 1A, an insulation detection module 2A, a first main positive switch 3A, a first main negative switch 4A, a vehicle load 5A, a DC-DC converter 6A, a second main positive switch 7A, a second main negative switch 8A and a fuel cell 9A;

[0032] The first detection end of the insulation detection module 2A is connected to the positive electrode of the power battery 1A, and the second detection end of the insulation detection module 2A is connected to the negative electrode of the power battery 1A;

[0033] The first main positive switch 3A is connected to the first detection end of the insulation detection module 2A, and the first main negative switch 4A is connected to the second detection end of the insulation detection module 2A;

[0034] The first input end of the vehicle load 5A is connected to the first main positive switch 3A, and the first output end of the vehicle load 5A is connected to the first main negative switch 4A;

[0035] The first output terminal of the DC-DC converter 6A is connected to the first input terminal of the vehicle load 5A, and the first input terminal of the DC-DC converter 6A is connected to the first output terminal of the vehicle load 5A;

[0036] The second main positive switch 7A is connected to the second input terminal of the DC-DC converter 6A, and the second main negative switch 8A is connected to the second output terminal of the DC-DC converter 6A;

[0037] The positive electrode of the fuel cell 9A is connected to the second main positive switch 7A, and the negative electrode of the fuel cell 9A is connected to the second main negative switch 8A;

[0038] The DC-DC converter 6A includes a diode 10A, the positive electrode of the diode 10A is connected to the first detection end of the insulation detection module 2A, and the negative electrode of the diode 10A is connected to the positive electrode of the fuel cell 9A through the inductor 11A;

[0039] The DC-DC converter 6A further includes an insulated gate bipolar transistor 12A, a collector of the insulated gate bipolar transistor 12A is connected to the positive electrode of the fuel cell 9A, and an emitter of the insulated gate bipolar transistor 12A is connected to the negative electrode of the fuel cell 9A.

[0040] It can be seen that in the related art, a single insulation detection module is usually set on one side of the power battery to monitor the insulation status of the power battery and the entire high-voltage system. However, there are some limitations in setting up a single insulation detection module. For example, due to the presence of a diode in the DC-DC converter, the fuel cell and the power battery are unidirectionally connected, which makes it impossible for a single insulation detection module to perform insulation detection on the fuel cell, and it is also impossible to perform a complete insulation detection on the high-voltage circuit of the whole vehicle when the fuel cell is connected to the high-voltage circuit of the whole vehicle. Therefore, it is impossible to accurately know the insulation status of the vehicle, which affects the reliability and safety of the vehicle and increases the risk of failure.

[0041] In addition, if two insulation detection modules are set up in the vehicle's high-voltage circuit to work simultaneously, interference may occur between the two modules, further affecting the accurate measurement of the insulation resistance, which will also limit the reliability and safety of the system and increase the risk of failure.

[0042] Based on the above problems, the applicant found that: a first insulation detection module is set on one side of the power battery and a second insulation detection module is set on one side of the fuel cell. When the vehicle is powered on at high voltage, the first insulation detection module is used to perform insulation detection on the high-voltage circuit of the whole vehicle to obtain the insulation resistance of the high-voltage circuit of the whole vehicle; when the insulation resistance of the high-voltage circuit of the whole vehicle is greater than or equal to the first preset resistance, it indicates that the high-voltage circuit of the whole vehicle has passed the preliminary insulation test and the insulation performance of the high-voltage circuit of the whole vehicle meets the basic safety requirements, then the fuel cell is insulation tested by the second insulation detection module to obtain the insulation resistance of the fuel cell; when the insulation resistance of the fuel cell is greater than or equal to the second preset resistance, it indicates that the insulation performance of the fuel cell meets the safety standards and there is no current leakage risk. The driving mode of the vehicle can be determined according to the received power source selection instruction. When the driving mode is the fuel cell driving mode, the first insulation detection module is turned off, the fuel cell is started, and the high-voltage circuit of the whole vehicle is insulation tested by the second insulation detection module to obtain the insulation resistance of the high-voltage circuit of the whole vehicle, thereby avoiding the influence of the first insulation detection module on the second insulation detection module, improving the reliability and safety of the vehicle, and increasing the risk of failure.

[0043] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0044] The present application provides a vehicle insulation detection circuit, such as Figure 4 As shown, in some embodiments, the vehicle insulation detection circuit includes: a power battery 1B, a first insulation detection module 2B, a first main positive switch 3B, a first main negative switch 4B, a vehicle load 5B, a DC-DC converter 6B, a second main positive switch 7B, a second main negative switch 8B, a second insulation detection module 9B and a fuel cell 10B;

[0045] The first detection end of the first insulation detection module 2B is connected to the positive electrode of the power battery 1B, and the second detection end of the first insulation detection module 2B is connected to the negative electrode of the power battery 1B;

[0046] The first main positive switch 3B is connected to the first detection end of the first insulation detection module 2B, and the first main negative switch 4B is connected to the second detection end of the first insulation detection module 2B;

[0047] The first input end of the vehicle load 5B is connected to the first main positive switch 3B, and the first output end of the vehicle load 5B is connected to the first main negative switch 4B;

[0048] The first output terminal of the DC-DC converter 6B is connected to the first input terminal of the vehicle load 5B, and the first input terminal of the DC-DC converter 6B is connected to the first output terminal of the vehicle load 5B;

[0049] The second main positive switch 7B is connected to the second input terminal of the DC-DC converter 6B, and the second main negative switch 8B is connected to the second output terminal of the DC-DC converter 6B;

[0050] The first detection end of the second insulation detection module 9B is connected to the second main positive switch 7B, and the second detection end of the second insulation detection module 9B is connected to the second main negative switch 8B;

[0051] The positive electrode of the fuel cell 10B is connected to the first detection end of the second insulation detection module 9B, and the negative electrode of the fuel cell 10B is connected to the second detection end of the second insulation detection module 9B;

[0052] The DC-DC converter 6B includes a diode 11B, the positive electrode of the diode 11B is connected to the first detection end of the first insulation detection module 2B, and the negative electrode of the diode 11B is connected to the first detection end of the second insulation detection module 9B through the inductor 12B;

[0053] The DC-DC converter 6B further includes an insulated gate bipolar transistor 13B, a collector of the insulated gate bipolar transistor 13B is connected to the positive electrode of the fuel cell 10B, and an emitter of the insulated gate bipolar transistor 13B is connected to the negative electrode of the fuel cell 10B.

[0054] It should be noted that when the power battery 1B is powered on at high voltage, the first main positive switch 3B and the first main negative switch 4B are closed; when the fuel cell 10B is started, the second main positive switch 7B and the second main negative switch 8B are closed;

[0055] When the second insulation detection module 9B is started and the first insulation detection module 2B is turned off, the first main positive switch 3B, the first main negative switch 4B, the second main positive switch 7B and the second main negative switch 8B are in a closed state.

[0056] The present application provides a vehicle insulation detection method, such as Figure 1 As shown, in some embodiments, a vehicle insulation detection method is executed by a vehicle controller or a data processor independently provided by the vehicle controller. The subsequent embodiments are all illustrated by taking the vehicle controller as an example. The vehicle includes a first insulation detection module provided on one side of the power battery and a second insulation detection module provided on one side of the fuel cell. The method includes:

[0057] S101, in response to the vehicle high voltage being powered on, performing insulation detection on the high voltage circuit of the whole vehicle through a first insulation detection module to obtain the insulation resistance value of the high voltage circuit of the whole vehicle;

[0058] In specific implementation, when the vehicle high voltage is powered on, the vehicle's entire high voltage circuit is connected to the power supply. At this time, the first insulation detection module (installed on one side of the power battery) will start its detection function and perform insulation detection on the entire vehicle's high voltage circuit. The purpose of the detection is to ensure that there is sufficient insulation between the vehicle's high voltage circuit and other parts of the vehicle (such as the vehicle body, low voltage system, etc.) to prevent current leakage and potential electrical failures. Through the measurement of the first insulation detection module, the insulation resistance of the vehicle's high voltage circuit will be obtained. A higher insulation resistance indicates that the insulation performance of the vehicle's high voltage circuit is better and the risk of current leakage is lower; a lower insulation resistance indicates that there is an insulation problem in the vehicle's high voltage circuit, which requires further inspection and processing. Through the preliminary insulation detection of the first insulation detection module, potential insulation problems can be discovered and handled in a timely manner to ensure the safe operation of the vehicle after the high voltage is powered on.

[0059] S102, in response to the insulation resistance of the high-voltage circuit of the whole vehicle being greater than or equal to the first preset resistance, performing insulation detection on the fuel cell by a second insulation detection module to obtain the insulation resistance of the fuel cell;

[0060] In specific implementation, when the insulation resistance of the high-voltage circuit of the whole vehicle is greater than or equal to the first preset resistance (exemplarily, the first preset resistance is set to 100Ω / V), it indicates that the whole vehicle high-voltage circuit of the vehicle has passed the preliminary insulation test, and the insulation performance of the whole vehicle high-voltage circuit meets the basic safety requirements. At this time, the fuel cell is further tested for insulation through the second insulation detection module. The insulation resistance of the fuel cell reflects the insulation performance of the fuel cell. A higher insulation resistance indicates that the insulation performance of the fuel cell is good, the risk of current leakage is low, and it can be connected to the high-voltage circuit of the whole vehicle; a lower insulation resistance indicates that there is an insulation problem with the fuel cell, which requires further inspection and processing to ensure that its insulation performance meets safety standards.

[0061] S103 . In response to the insulation resistance of the fuel cell being greater than or equal to the second preset resistance, determining a driving mode of the vehicle according to the received power source selection instruction.

[0062] In specific implementation, when the insulation resistance of the fuel cell is greater than or equal to the second preset resistance (exemplarily, the second preset resistance is set to 100Ω / V), it indicates that the insulation performance of the fuel cell meets the safety standards and there is no risk of current leakage. At this time, the driving mode of the vehicle is determined according to the received power source selection instruction. The power source selection instruction indicates which power source the vehicle should use to drive. For hybrid or multi-power source vehicles, the power source selection instruction can choose to use a fuel cell, a power battery, an internal combustion engine, or a combination thereof to drive the vehicle; it can flexibly select and adjust the vehicle's driving mode while ensuring that the insulation performance of the fuel cell meets safety standards, thereby improving the safety of the vehicle and optimizing its performance and efficiency.

[0063] In this embodiment, the insulation resistance of the high-voltage circuit of the whole vehicle is detected, and then the insulation resistance of the fuel cell is detected to effectively identify and isolate potential electrical faults. The multi-level insulation detection mechanism helps to prevent electrical leakage and short circuits, thereby improving the safety of the vehicle and improving the efficiency of insulation detection. After ensuring that the insulation performance meets the requirements, the best driving mode can be selected according to the received power source selection instruction to optimize the performance and efficiency of the vehicle. By setting up two independent insulation detection modules, the comprehensiveness and reliability of vehicle insulation detection are enhanced, and the early detection and prevention of vehicle insulation failures reduce the need for repairs and maintenance due to electrical problems, thereby reducing the maintenance cost and time of the vehicle.

[0064] How to detect insulation of a vehicle in a fuel cell driving mode is described in detail based on the following embodiments.

[0065] In some embodiments, the method further comprises:

[0066] In response to the driving mode being a fuel cell driving mode, turning off the first insulation detection module, starting the fuel cell, and performing insulation detection on the high-voltage circuit of the whole vehicle through the second insulation detection module to obtain the insulation resistance value of the high-voltage circuit of the whole vehicle;

[0067] During specific implementation, the current driving mode is determined according to the received instructions. If the driving mode is set to the fuel cell driving mode, it indicates that the vehicle will mainly rely on the fuel cell as a power source. At this time, the first insulation detection module is turned off, the fuel cell is started, and it is connected to the high-voltage circuit of the whole vehicle. The insulation of the high-voltage circuit of the whole vehicle is detected by the second insulation detection module to obtain the insulation resistance of the high-voltage circuit of the whole vehicle. Among them, turning off the first insulation detection module can ensure that the first insulation detection module will not affect the accuracy of the insulation detection of the high-voltage circuit of the whole vehicle by the second insulation detection module.

[0068] In response to the insulation resistance of the vehicle high-voltage circuit being greater than or equal to a third preset resistance, the vehicle is driven in the fuel cell driving mode, wherein the power source corresponding to the fuel cell driving mode includes at least a fuel cell.

[0069] In specific implementation, when the insulation resistance of the high-voltage circuit of the whole vehicle is greater than or equal to the third preset resistance (exemplarily, the third preset resistance is set to 100Ω / V), it indicates that the insulation state of the high-voltage circuit of the whole vehicle is safe and meets the driving requirements, allowing the vehicle to drive in the fuel cell driving mode, ensuring that the vehicle will not cause electrical failures or safety hazards due to insulation problems during driving. In the fuel cell driving mode, the fuel cell is the main power source. The main power of the vehicle comes from the electricity generated by the fuel cell.

[0070] In this embodiment, by shutting down the first insulation detection module and starting the second insulation detection module, it can be ensured that the first insulation detection module will not affect the accuracy and reliability of the insulation detection of the vehicle high-voltage circuit by the second insulation detection module, thereby ensuring that the insulation state of the high-voltage circuit meets safety standards. An independent insulation detection module can simplify the maintenance and fault diagnosis process of the vehicle high-voltage circuit. When a problem occurs, the faulty module can be quickly located and replaced, reducing maintenance time and cost.

[0071] The vehicle insulation detection process before the vehicle high voltage is powered on is described in detail based on the following embodiments.

[0072] In some embodiments, before responding to the vehicle high voltage power-up, the method further includes:

[0073] In response to the vehicle being powered on at low voltage, the first insulation detection module performs insulation detection on the power battery to obtain an insulation resistance value of the power battery;

[0074] In specific implementation, low-voltage power-on usually refers to the vehicle's low-voltage electrical system (such as a 12V or 24V system) starting to supply power, which is mainly used to activate on-board electronic equipment and control systems. The first insulation detection module is used to detect the insulation state of the power battery. By measuring the insulation resistance of the power battery, it is determined whether there is an insulation fault to ensure the safety of the power battery and improve the reliability of the vehicle.

[0075] In response to determining that the insulation resistance of the power battery is greater than or equal to a fourth preset resistance, the vehicle is powered on at high voltage.

[0076] In specific implementation, when it is determined that the insulation resistance of the power battery is greater than or equal to the fourth preset resistance (exemplarily, the fourth preset resistance is set to 100Ω / V), indicating that the insulation state of the power battery is good, the high voltage of the vehicle will be allowed to be powered on, which can ensure that the power battery is in a safe state, thereby avoiding electrical failures and safety accidents.

[0077] In this embodiment, the power battery is subjected to insulation testing before the vehicle is powered on at high voltage, and high voltage power-on is allowed only when the insulation resistance of the power battery is greater than or equal to a fourth preset resistance, so that insulation problems of the power battery can be discovered in time to prevent electrical failures caused by poor insulation; ensuring that the insulation resistance is within a safe range can effectively prevent the risk of electric shock to passengers and maintenance personnel or cause a fire after the high-voltage system is powered on.

[0078] How to determine the driving mode of the vehicle according to the received power source selection instruction is described in detail based on the following embodiments.

[0079] In some embodiments, determining the driving mode of the vehicle according to the received power source selection instruction includes:

[0080] In response to the power source corresponding to the power source selection instruction including a fuel cell, determining that the driving mode of the vehicle is a fuel cell driving mode, wherein the power source corresponding to the fuel cell driving mode at least includes a fuel cell;

[0081] In specific implementation, the power source selection instruction is a signal or command received by the vehicle control system to instruct which power source to use for driving the vehicle. The instruction may come from the driver's selection, the vehicle's automatic control system, or external conditions (such as the navigation system, driving mode selection, etc.). When the power source selection instruction specifies the use of a fuel cell as the power source, the vehicle's control system will switch the driving mode to the fuel cell driving mode, and the fuel cell will be used as the main power source to drive the vehicle.

[0082] In response to the power source corresponding to the power source selection instruction including a power battery, the driving mode of the vehicle is determined to be a power battery driving mode, and the power source corresponding to the power battery driving mode at least includes a power battery.

[0083] In specific implementation, when the power source selection instruction specifies to use the power battery as the power source, the vehicle's control system will switch the driving mode to the power battery driving mode, and the power battery will be the main power source. The electric energy stored in the power battery is transmitted to the electric motor through the power electronic device to drive the vehicle.

[0084] In this embodiment, by receiving the power source selection instruction and determining the corresponding driving mode, the vehicle can flexibly select the appropriate power source to optimize performance, improve efficiency, enhance the driving experience, and meet different driving needs and environmental conditions.

[0085] The fuel cell driving mode is described in detail based on the following embodiments.

[0086] In some embodiments, Figure 2 As shown, the fuel cell driving mode includes a pure fuel cell mode and a cooperative mode; after determining that the driving mode of the vehicle is the fuel cell driving mode, the method further includes:

[0087] S201, obtaining the output power of the fuel cell;

[0088] In specific implementation, the output power of a fuel cell refers to the electrical energy output that the fuel cell can provide under the current working state, usually in kilowatts (kW). The output power depends on many factors, including the design specifications of the fuel cell, the amount of fuel supplied, the operating temperature, the environmental conditions, etc. In order to obtain the output power of the fuel cell, the vehicle needs to be equipped with corresponding sensors and monitoring systems to measure the voltage, current and other parameters of the fuel cell in real time, and calculate the current output power.

[0089] S202A, in response to determining that the output power of the fuel cell is greater than or equal to the preset power, determining that the driving mode of the vehicle is a pure fuel cell mode; wherein the power source corresponding to the pure fuel cell mode is the fuel cell;

[0090] In specific implementation, when it is detected that the output power of the fuel cell is greater than or equal to the preset power (for example, the preset power can be set to the rated power of the vehicle's motor), the vehicle's driving mode is set to pure fuel cell mode, and the vehicle's power is completely provided by the fuel cell. In the pure fuel cell mode, it can reduce the loss in the energy conversion process and improve the vehicle's energy efficiency. It is suitable for operating conditions where the vehicle's power demand is stable and the load is low.

[0091] S202B, in response to determining that the output power of the fuel cell is less than the preset power, determining that the driving mode of the vehicle is a cooperative mode; wherein the power sources corresponding to the cooperative mode are the fuel cell and the power battery.

[0092] In specific implementation, when it is detected that the output power of the fuel cell is less than the preset power, the vehicle's driving mode is set to the collaborative mode, and the vehicle's power is provided by the fuel cell and the power battery. The fuel cell and the power battery work together to provide a higher total power, which can meet the vehicle's power requirements when the output power of the fuel cell is low or the vehicle is accelerating, climbing and other high-load conditions. At the same time, the collaborative mode can smooth the power output, avoid the power fluctuations that may occur when the fuel cell works alone, and improve the driving experience.

[0093] In this embodiment, by switching between different driving modes, the energy resources of the fuel cell and the power battery can be more effectively utilized. When the output power of the fuel cell is sufficient, the vehicle can be driven entirely by the fuel cell, avoiding the discharge of the power battery, thereby saving battery energy. When the output power of the fuel cell is insufficient, the power battery can provide auxiliary power to ensure that the power demand of the vehicle is met, while optimizing the working efficiency of the fuel cell. By dynamically adjusting the driving mode, it is possible to better cope with emergencies, improve the reliability of the overall system, and ensure the normal operation of the vehicle.

[0094] The case where the insulation resistance of the fuel cell is less than the second preset resistance is described in detail based on the following embodiments.

[0095] In some embodiments, the method further comprises:

[0096] In response to the insulation resistance of the fuel cell being less than the second preset resistance, the driving mode of the vehicle is determined to be a power battery driving mode; wherein the power source corresponding to the power battery driving mode is a power battery.

[0097] In specific implementation, when it is detected that the insulation resistance of the fuel cell is lower than the second preset resistance, it indicates that there is an insulation failure in the fuel cell. Switching to the power battery drive mode can protect the fuel cell and the high-voltage circuit of the entire vehicle, avoiding further damage caused by the insulation failure, so as to improve the reliability and stability of the vehicle.

[0098] In this embodiment, since insulation failure may cause fuel cell overload, by switching to the power battery drive mode, the fuel cell can be prevented from further damage, thereby extending the service life of the fuel cell. By continuously monitoring the insulation resistance value, potential problems can be discovered in a timely manner, and the drive mode can be dynamically adjusted according to the monitoring results to ensure that the vehicle operates in the best state, reduce the occurrence of failures, and improve the reliability of the vehicle. When a problem occurs in the fuel cell, the power battery drive mode provides backup power to ensure the normal operation of the vehicle and avoid the vehicle being unable to drive due to fuel cell failure.

[0099] The situation where the insulation resistance of the high-voltage circuit of the whole vehicle is less than the third preset resistance is described in detail based on the following embodiments.

[0100] In some embodiments, the method further comprises:

[0101] In response to the insulation resistance of the high-voltage circuit of the entire vehicle being less than a third preset resistance, the fuel cell is turned off and the high voltage of the vehicle is controlled to be powered off.

[0102] In specific implementation, when the insulation resistance of the high-voltage circuit of the whole vehicle is less than the third preset resistance, there is a risk of leakage in the high-voltage circuit of the whole vehicle. By shutting down the fuel cell and controlling the high-voltage power supply of the vehicle, it is ensured that the work is stopped in a safe state to prevent accidents such as electric shock and fire, thereby significantly improving the safety and reliability of fuel cell vehicles.

[0103] In this embodiment, if the insulation resistance of the high-voltage circuit of the whole vehicle is less than the third preset resistance, it indicates that current may be leaking. Turning off the fuel cell and powering off can prevent passengers or maintenance personnel from contacting high voltage electricity and avoid electric shock accidents. Insulation failure may cause the high-voltage circuit of the whole vehicle to overload or short-circuit. Turning off the fuel cell can protect the fuel cell and other electrical components to reduce equipment loss and damage and extend the service life of the vehicle.

[0104] It should be noted that the method of the embodiment of the present application can be performed by a single device, such as a computer or server. The method of this embodiment can also be applied to a distributed scenario and completed by multiple devices cooperating with each other. In the case of such a distributed scenario, one of the multiple devices can only perform one or more steps in the method of the embodiment of the present application, and the multiple devices will interact with each other to complete the described method.

[0105] It should be noted that the above describes some embodiments of the present application. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the above embodiments and still achieve the desired results. In addition, the processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0106] Based on the same inventive concept, corresponding to any of the above-mentioned embodiment methods, the present application also provides a vehicle insulation detection device.

[0107] refer to Figure 5 , the vehicle insulation detection device, the device comprising:

[0108] The first judgment module 701 is configured to, in response to the vehicle high voltage power-on, perform insulation detection on the vehicle high voltage circuit through the first insulation detection module to obtain the insulation resistance of the vehicle high voltage circuit; in response to the insulation resistance of the vehicle high voltage circuit being greater than or equal to the first preset resistance, perform insulation detection on the fuel cell through the second insulation detection module to obtain the insulation resistance of the fuel cell;

[0109] The second judgment module 702 is configured to determine the driving mode of the vehicle according to the received power source selection instruction in response to the insulation resistance of the fuel cell being greater than or equal to the second preset resistance.

[0110] Furthermore, the second determining module 702 is specifically configured to:

[0111] In response to the driving mode being a fuel cell driving mode, turning off the first insulation detection module, starting the fuel cell, and performing insulation detection on the high-voltage circuit of the whole vehicle through the second insulation detection module to obtain the insulation resistance value of the high-voltage circuit of the whole vehicle;

[0112] In response to the insulation resistance of the vehicle high-voltage circuit being greater than or equal to a third preset resistance, the vehicle is driven in the fuel cell driving mode, wherein the power source corresponding to the fuel cell driving mode includes at least a fuel cell.

[0113] Furthermore, the first determining module 701 is specifically configured to:

[0114] In response to the driving mode being a fuel cell driving mode, turning off the first insulation detection module, starting the fuel cell, and performing insulation detection on the high-voltage circuit of the whole vehicle through the second insulation detection module to obtain the insulation resistance value of the high-voltage circuit of the whole vehicle;

[0115] In response to the insulation resistance of the vehicle high-voltage circuit being greater than or equal to a third preset resistance, the vehicle is driven in the fuel cell driving mode, wherein the power source corresponding to the fuel cell driving mode includes at least a fuel cell.

[0116] Furthermore, the first determining module 701 is further configured to:

[0117] In response to the vehicle being powered on at low voltage, the first insulation detection module performs insulation detection on the power battery to obtain an insulation resistance value of the power battery;

[0118] In response to determining that the insulation resistance of the power battery is greater than or equal to a fourth preset resistance, the vehicle is powered on at high voltage.

[0119] Furthermore, the second determining module 702 is further configured to:

[0120] In response to the power source corresponding to the power source selection instruction including a fuel cell, determining that the driving mode of the vehicle is a fuel cell driving mode, wherein the power source corresponding to the fuel cell driving mode at least includes a fuel cell;

[0121] In response to the power source corresponding to the power source selection instruction including a power battery, the driving mode of the vehicle is determined to be a power battery driving mode, and the power source corresponding to the power battery driving mode at least includes a power battery.

[0122] Furthermore, the second determining module 702 is further configured to:

[0123] Obtaining the output power of the fuel cell, and in response to determining that the output power of the fuel cell is greater than or equal to the preset power, determining that the driving mode of the vehicle is a pure fuel cell mode; wherein the power source corresponding to the pure fuel cell mode is the fuel cell;

[0124] In response to determining that the output power of the fuel cell is less than a preset power, the driving mode of the vehicle is determined to be a cooperative mode; wherein the power sources corresponding to the cooperative mode are the fuel cell and the power battery.

[0125] Furthermore, the second determining module 702 is further configured to:

[0126] In response to the insulation resistance of the fuel cell being less than the second preset resistance, the driving mode of the vehicle is determined to be a power battery driving mode; wherein the power source corresponding to the power battery driving mode is a power battery.

[0127] Furthermore, the second determining module 702 is further configured to:

[0128] In response to the insulation resistance of the high-voltage circuit of the entire vehicle being less than a third preset resistance, the fuel cell is turned off and the high voltage of the vehicle is controlled to be powered off.

[0129] For the convenience of description, the above device is described in terms of functions divided into various modules. Of course, when implementing the present application, the functions of each module can be implemented in the same or multiple software and / or hardware.

[0130] The device of the above embodiment is used to implement the corresponding vehicle insulation detection method in any of the above embodiments, and has the beneficial effects of the corresponding method embodiment, which will not be repeated here.

[0131] Based on the same inventive concept, corresponding to any of the above-mentioned embodiments and methods, the present application also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the vehicle insulation detection method described in any of the above embodiments is implemented.

[0132] Figure 6 A more specific schematic diagram of the hardware structure of an electronic device provided in this embodiment is shown, and the device may include: a processor 1010, a memory 1020, an input / output interface 1030, a communication interface 1040, and a bus 1050. The processor 1010, the memory 1020, the input / output interface 1030, and the communication interface 1040 are connected to each other through the bus 1050 in the device.

[0133] The processor 1010 can be implemented by a general-purpose CPU (Central Processing Unit), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided in the embodiments of this specification.

[0134] The memory 1020 may be implemented in the form of ROM (Read Only Memory), RAM (Random Access Memory), static storage device, dynamic storage device, etc. The memory 1020 may store an operating system and other application programs. When the technical solutions provided in the embodiments of this specification are implemented by software or firmware, the relevant program codes are stored in the memory 1020 and are called and executed by the processor 1010.

[0135] The input / output interface 1030 is used to connect the input / output module to realize information input and output. The input / output module can be configured in the device as a component (not shown in the figure), or it can be externally connected to the device to provide corresponding functions. The input device may include a keyboard, a mouse, a touch screen, a microphone, various sensors, etc., and the output device may include a display, a speaker, a vibrator, an indicator light, etc.

[0136] The communication interface 1040 is used to connect a communication module (not shown) to realize communication interaction between the device and other devices. The communication module can realize communication through a wired mode (such as USB, network cable, etc.) or a wireless mode (such as mobile network, WIFI, Bluetooth, etc.).

[0137] The bus 1050 includes a path that transmits information between the various components of the device (eg, the processor 1010, the memory 1020, the input / output interface 1030, and the communication interface 1040).

[0138] It should be noted that, although the above device only shows the processor 1010, the memory 1020, the input / output interface 1030, the communication interface 1040 and the bus 1050, in the specific implementation process, the device may also include other components necessary for normal operation. In addition, it can be understood by those skilled in the art that the above device may also only include the components necessary for implementing the embodiments of the present specification, and does not necessarily include all the components shown in the figure.

[0139] The electronic device of the above embodiment is used to implement the corresponding vehicle insulation detection method in any of the above embodiments, and has the beneficial effects of the corresponding method embodiment, which will not be repeated here.

[0140] Based on the same inventive concept, corresponding to any of the above-mentioned embodiment methods, the present application also provides a non-transitory computer-readable storage medium, wherein the non-transitory computer-readable storage medium stores computer instructions, and the computer instructions are used to enable the computer to execute the vehicle insulation detection method described in any of the above embodiments.

[0141] The computer-readable medium of this embodiment includes permanent and non-permanent, removable and non-removable media, and information storage can be implemented by any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, read-only compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, tape disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device.

[0142] The computer instructions stored in the storage medium of the above embodiment are used to enable the computer to execute the vehicle insulation detection method described in any of the above embodiments, and have the beneficial effects of the corresponding method embodiments, which will not be repeated here.

[0143] Based on the same concept, corresponding to any of the above-mentioned embodiment methods, the present application also provides a computer program product, including computer program instructions. When the computer program instructions are run on a computer, the computer executes the method described in any of the above embodiments, which has the beneficial effects of the corresponding method embodiments and will not be repeated here.

[0144] It is understandable that before using the technical solutions of each embodiment of the present disclosure, the type, scope of use, usage scenarios, etc. of the personal information involved will be informed to the user in an appropriate manner, and the user's authorization will be obtained.

[0145] For example, in response to receiving an active request from a user, a prompt message is sent to the user to clearly remind the user that the operation requested to be performed will require obtaining and using the user's personal information. Thus, the user can independently choose whether to provide personal information to software or hardware such as an electronic device, application, server, or storage medium that performs the operation of the technical solution of the present disclosure according to the prompt message.

[0146] As an optional but non-limiting implementation, in response to receiving the user's active request, the prompt information may be sent to the user in the form of a pop-up window, in which the prompt information may be presented in text form. In addition, the pop-up window may also carry a selection control for the user to choose "agree" or "disagree" to provide personal information to the electronic device.

[0147] It is understandable that the above notification and the process of obtaining user authorization are merely illustrative and do not constitute a limitation on the implementation of the present disclosure. Other methods that meet relevant laws and regulations may also be applied to the implementation of the present disclosure.

[0148] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present application (including the claims) is limited to these examples. In line with the concept of the present application, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present application as described above, which are not provided in detail for the sake of simplicity.

[0149] In addition, to simplify the description and discussion, and in order not to make the embodiments of the present application difficult to understand, the known power supply / ground connection with the integrated circuit (IC) chip and other components may or may not be shown in the provided drawings. In addition, the device can be shown in the form of a block diagram to avoid making the embodiments of the present application difficult to understand, and this also takes into account the fact that the details of the implementation of these block diagram devices are highly dependent on the platform to be implemented in the embodiments of the present application (that is, these details should be fully within the scope of understanding of those skilled in the art). In the case of elaborating specific details (e.g., circuits) to describe exemplary embodiments of the present application, it is obvious to those skilled in the art that the embodiments of the present application can be implemented without these specific details or when these specific details are changed. Therefore, these descriptions should be considered to be illustrative rather than restrictive.

[0150] Although the present application has been described in conjunction with specific embodiments of the present application, many replacements, modifications and variations of these embodiments will be apparent to those skilled in the art from the foregoing description. For example, other memory architectures (e.g., dynamic RAM (DRAM)) may use the embodiments discussed.

[0151] The embodiments of the present application are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present application should be included in the scope of protection of the present application.

Claims

1. A vehicle insulation detection method, characterized in that: The vehicle includes a first insulation detection module arranged on one side of the power battery and a second insulation detection module arranged on one side of the fuel cell; the method includes: In response to the vehicle high voltage being powered on, the first insulation detection module performs insulation detection on the high voltage circuit of the whole vehicle to obtain the insulation resistance of the high voltage circuit of the whole vehicle; in response to the insulation resistance of the high voltage circuit of the whole vehicle being greater than or equal to the first preset resistance, the second insulation detection module performs insulation detection on the fuel cell to obtain the insulation resistance of the fuel cell; In response to the insulation resistance of the fuel cell being greater than or equal to the second preset resistance, the driving mode of the vehicle is determined according to the received power source selection instruction.

2. The vehicle insulation detection method according to claim 1, characterized in that: The method further comprises: In response to the driving mode being a fuel cell driving mode, turning off the first insulation detection module, starting the fuel cell, and performing insulation detection on the high-voltage circuit of the whole vehicle through the second insulation detection module to obtain the insulation resistance value of the high-voltage circuit of the whole vehicle; In response to the insulation resistance of the vehicle high-voltage circuit being greater than or equal to a third preset resistance, the vehicle is driven in the fuel cell driving mode, wherein the power source corresponding to the fuel cell driving mode includes at least a fuel cell.

3. The vehicle insulation detection method according to claim 1, characterized in that: Before responding to the vehicle high voltage power-up, the method further includes: In response to the vehicle being powered on at low voltage, the first insulation detection module performs insulation detection on the power battery to obtain an insulation resistance value of the power battery; In response to determining that the insulation resistance of the power battery is greater than or equal to a fourth preset resistance, the vehicle is powered on at high voltage.

4. The vehicle insulation detection method according to claim 1, characterized in that: Determining the driving mode of the vehicle according to the received power source selection instruction includes: In response to the power source corresponding to the power source selection instruction including a fuel cell, determining that the driving mode of the vehicle is a fuel cell driving mode, wherein the power source corresponding to the fuel cell driving mode at least includes a fuel cell; In response to the power source corresponding to the power source selection instruction including a power battery, the driving mode of the vehicle is determined to be a power battery driving mode, and the power source corresponding to the power battery driving mode at least includes a power battery.

5. The vehicle insulation detection method according to claim 4, characterized in that: The fuel cell driving mode includes a pure fuel cell mode and a cooperative mode; after determining that the driving mode of the vehicle is the fuel cell driving mode, the method further includes: Obtaining the output power of the fuel cell, and in response to determining that the output power of the fuel cell is greater than or equal to the preset power, determining that the driving mode of the vehicle is a pure fuel cell mode; wherein the power source corresponding to the pure fuel cell mode is the fuel cell; In response to determining that the output power of the fuel cell is less than a preset power, the driving mode of the vehicle is determined to be a cooperative mode; wherein the power sources corresponding to the cooperative mode are the fuel cell and the power battery.

6. The vehicle insulation detection method according to claim 1, characterized in that: The method further comprises: In response to the insulation resistance of the fuel cell being less than the second preset resistance, the driving mode of the vehicle is determined to be a power battery driving mode; wherein the power source corresponding to the power battery driving mode is a power battery.

7. The vehicle insulation detection method according to claim 2, characterized in that: The method further comprises: In response to the insulation resistance of the high-voltage circuit of the entire vehicle being less than a third preset resistance, the fuel cell is turned off and the high voltage of the vehicle is controlled to be powered off.

8. A vehicle insulation detection circuit, characterized in that: include: A power battery, a first insulation detection module, a first main positive switch, a first main negative switch, a vehicle load, a DC-DC converter, a second main positive switch, a second main negative switch, a second insulation detection module, and a fuel cell; The first detection end of the first insulation detection module is connected to the positive electrode of the power battery, and the second detection end of the first insulation detection module is connected to the negative electrode of the power battery; The first main positive switch is connected to the first detection end of the first insulation detection module, and the first main negative switch is connected to the second detection end of the first insulation detection module; The first input terminal of the vehicle load is connected to the first main positive switch, and the first output terminal of the vehicle load is connected to the first main negative switch; The first output terminal of the DC-DC converter is connected to the first input terminal of the vehicle load, and the first input terminal of the DC-DC converter is connected to the first output terminal of the vehicle load; The second main positive switch is connected to the second input terminal of the DC-DC converter, and the second main negative switch is connected to the second output terminal of the DC-DC converter; The first detection terminal of the second insulation detection module is connected to the second main positive switch, and the second detection terminal of the second insulation detection module is connected to the second main negative switch; The positive electrode of the fuel cell is connected to the first detection end of the second insulation detection module, and the negative electrode of the fuel cell is connected to the second detection end of the second insulation detection module; The DC-DC converter comprises a diode, the anode of the diode is connected to the first detection end of the first insulation detection module, and the cathode of the diode is connected to the first detection end of the second insulation detection module.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the program, the method according to any one of claims 1 to 7 is implemented.

10. A vehicle, characterized in that: The vehicle comprises the electronic device as claimed in claim 9.

Images