Management method, system and storage medium of motor vehicle control system

Abstract

The embodiment of the present application provides a management method, system and storage medium for a motor vehicle control system, which relates to the field of fuel cell technology. The method includes disconnecting the battery stack from the high-voltage circuit; starting the high-pressure water pump at the lowest speed and controlling the coolant flow to the heater to be a first preset value; obtaining the cumulative running time of the high-pressure water pump and judging whether the cumulative running time meets the preset first condition; when it is determined that the cumulative running time meets the first condition and the conductivity in the heat dissipation loop is greater than or equal to the high-voltage starting conductivity threshold value, controlling the increase or decrease of the speed of the high-pressure water pump and returning to the step of obtaining the cumulative running time until the cumulative running time is greater than or equal to the first time or the conductivity is less than the high-voltage starting threshold; turning off the high-pressure water pump, and connecting the battery stack and the high-voltage circuit; judging whether to provide high voltage electricity to the high-voltage circuit through the battery stack according to the insulation resistance of the high-voltage circuit. The embodiment of the present application can solve the problem of the inability to start the motor vehicle due to long-term non-starting.

Description

Technical Field

[0001] The present application relates to, but is not limited to, the field of fuel cell technology, and in particular to a management method, system and storage medium for a motor vehicle control system. Background Art

[0002] With the widespread use of hydrogen fuel cells in motor vehicles, the safety control of motor vehicles has become more stringent. For example, a high-voltage circuit is provided on the motor vehicle, one branch of the high-voltage circuit is provided with a boost DC, and a high-voltage component is provided on the other branch. The high-voltage component is provided in parallel with the boost DC, and the stack is connected to the high-voltage circuit through the boost DC. Therefore, in order to ensure the safety of the motor vehicle, the stack is often not allowed to supply power to the high-voltage circuit when the insulation resistance of the high-voltage circuit is too low. However, in actual applications, components such as radiators and intercoolers in the heat dissipation loop connected to the stack will precipitate ions, causing the water conductivity to be too high, resulting in the stack insulation resistance being too low, thereby lowering the insulation resistance of the high-voltage circuit, resulting in the high-voltage circuit being unable to start, and then causing the motor vehicle to be unable to start normally. Therefore, how to solve the problem of the inability to start a motor vehicle due to long-term non-starting is an urgent problem to be solved. Summary of the invention

[0003] The main purpose of the embodiments of the present application is to provide a management method, system and storage medium for a motor vehicle control system, which can solve the problem that the motor vehicle cannot be started due to long-term non-starting.

[0004] To achieve the above-mentioned purpose, a first aspect of an embodiment of the present application proposes a management method for a motor vehicle control system, wherein the motor vehicle control system includes a fuel cell module and a high-voltage circuit, wherein the fuel cell module includes a stack, a heat dissipation loop, and a deionization branch connected to the heat dissipation loop, wherein a high-pressure water pump, a radiator, and a heater are provided on the heat dissipation loop; the output ends of the radiator and the heater are connected to the input end of the stack through the high-pressure water pump; the input ends of the radiator and the heater are connected to the output end of the stack; the stack is used to supply power to the high-voltage circuit, and the method includes:

[0005] Disconnecting the battery stack from the high-voltage circuit;

[0006] Starting the high-pressure water pump at the lowest speed and controlling the coolant flow to the heater to be a first preset value, so that the coolant circulates in the heat dissipation loop, the deionization branch, and the fuel cell stack;

[0007] Obtaining the accumulated running time of the high-pressure water pump and determining whether the accumulated running time meets a preset first condition;

[0008] When it is determined that the accumulated running time satisfies the first condition and the conductivity in the heat dissipation loop is greater than or equal to the high-voltage starting conductivity threshold value, the speed of the high-pressure water pump is controlled to increase or decrease and the step of obtaining the accumulated running time of the high-pressure water pump is returned to until any one of the stop adjustment conditions of the accumulated running time being greater than or equal to the first time and the conductivity being less than the high-voltage starting threshold value is met;

[0009] When the stop adjustment condition is met, the high-pressure water pump is turned off, and the battery stack and the high-voltage circuit are connected;

[0010] According to the insulation resistance of the high-voltage circuit, it is determined whether high voltage electricity is provided to the high-voltage circuit through the battery stack.

[0011] To achieve the above-mentioned purpose, a second aspect of an embodiment of the present application provides a motor vehicle control system, the motor vehicle control system comprising:

[0012] A fuel cell module, the fuel cell module comprising a fuel cell control module, a stack and a heat dissipation loop, the heat dissipation loop being provided with a high-pressure water pump, a radiator and a heater; the output ends of the radiator and the heater are both connected to the input end of the stack through the high-pressure water pump; the input ends of the radiator and the heater are both connected to the output end of the stack;

[0013] A high-voltage circuit, wherein a controller is provided between the high-voltage circuit and the fuel cell stack, and the controller is used to control the high-voltage circuit to be disconnected or connected to the fuel cell stack;

[0014] The fuel cell control module executes any method described in the first aspect.

[0015] To achieve the above-mentioned purpose, the third aspect of an embodiment of the present application proposes a computer-readable storage medium, which is a computer-readable storage medium. The storage medium stores a computer program, and when the computer program is executed by a processor, it implements the management method of the motor vehicle control system described in the first aspect above.

[0016] The management method, system and storage medium of the motor vehicle control system proposed in this application disconnect the battery stack from the high-voltage circuit, so that the high-pressure water pump can be controlled to start under high pressure under the premise of ensuring the safety of the whole vehicle, so that the coolant circulates between the heat dissipation loop, the deionization branch and the battery stack, thereby achieving the purpose of reducing the conductivity, and then improving the insulation resistance of the high-voltage circuit by increasing the insulation resistance of the battery stack. At the same time, controlling the increase or decrease of the speed of the high-pressure water pump based on the accumulated time and adjustment conditions can reduce energy consumption and further ensure that the high-pressure water pump can operate normally; controlling the increase or decrease of the speed of the high-pressure water pump based on the accumulated time and adjustment conditions can also increase the speed of reduction by controlling the circulation speed of the coolant. Therefore, compared with the related art, the embodiment of the present application can improve the starting efficiency under the premise of being unable to start the motor vehicle due to long-term non-starting. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a module schematic diagram of a motor vehicle control system provided by an embodiment of the present application;

[0018] Figure 2 is a control schematic diagram of an embodiment of a motor vehicle control system provided by an embodiment of the present application;

[0019] Figure 3 It is a flowchart of a management method of a motor vehicle control system provided by an embodiment of the present application;

[0020] Figure 4 is a schematic diagram of a fuel cell module of an embodiment of a motor vehicle control system provided by an embodiment of the present application;

[0021] Figure 5 It is a control flow diagram of an embodiment of a management method of a motor vehicle control system provided by an embodiment of the present application;

[0022] Figure 6 It is a schematic diagram of the hardware structure of the equipment corresponding to the management method of the motor vehicle control system provided in the embodiment of the present application.

[0023] Reference numerals:

[0024] Fuel cell module 100, fuel cell control module 110, fuel cell stack 120, heat dissipation loop 130, deionization branch 140, high pressure water pump 150, heater 160, radiator 170, deionizer 180,

[0025] High-pressure circuit 200,

[0026] Controller 300,

[0027] Equipment controller 410 , control switch 420 , power battery 430 . DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein are only for the purpose of describing the embodiments of this application and are not intended to limit this application.

[0030] The following is an explanation of the components involved in the fuel cell system in the embodiment of the present application:

[0031] Intercooler: One of the flow channels flows through air, and the other flow channel flows through liquid. Its main function is to cool the high-temperature and high-pressure air compressed by the air compressor to meet the air temperature requirements of the fuel cell stack inlet.

[0032] Deionizer: The battery stack is sensitive to conductivity. If the conductivity of the coolant is too high, the insulation resistance of the entire system will decrease. Therefore, a deionizer is needed to specifically remove conductive ions in the liquid, reduce the conductivity of the liquid in the entire system, increase the insulation resistance of the system, increase the service life of the battery stack, and at the same time improve the electrical safety of the system.

[0033] Radiator: It is mainly composed of a heat dissipation core, a fan, a fixed core and a fan structure. The coolant flows through the core flow channel. When the fan is turned on, the coolant heat is blown to the air through the core, which is a liquid-gas heat exchange form. Under different power operating conditions, the fan speed is adjusted to meet the heat dissipation requirements under different operating conditions. The radiator is mainly used to dissipate heat and control the inlet temperature of the battery stack.

[0034] Expansion water tank: The main function is to provide expansion space for pipeline liquid, water replenishment, pressure stabilization, exhaust, etc. Coolant is added through the expansion water tank filling port; after long-term operation, the coolant is also replenished through the filling port. The heat dissipation loop in the system will lead two exhaust ports connected to the expansion water tank. The coolant brings the gas in the pipeline to the expansion water tank. When the gas brought to the expansion water tank increases, the gas pressure above the expansion water tank is higher than the pressure of the pressure valve on the filling port cover. The pressure valve opens and the gas in the pipeline is discharged through the exhaust port on the filling port. The operating pressure in the pipeline will fluctuate at different times, and the management pressure at different water pump speeds is also different. When the pressure in the pipeline changes and fluctuates, the expansion water tank can play a role in stabilizing the pressure. Under different ambient temperatures, the volume of the liquid in the pipeline will change. The expansion water tank provides expansion space to meet the volume changes of the coolant in the pipeline in the heat dissipation loop at different temperatures of the system.

[0035] Filter: Used to remove impurities and prevent them from entering the battery stack and damaging it. The filter protects all components in the circuit and prevents impurities from damaging the components and the battery stack.

[0036] The high-pressure water pump is the power source in the heat dissipation loop. Its speed can be adjusted to meet the flow requirements under different operating power conditions. The high-pressure water pump mainly controls the temperature difference between the inlet and outlet of the fuel cell stack.

[0037] With the widespread application of hydrogen fuel cells in motor vehicles, the safety control of motor vehicles has become more stringent. For example, a high-voltage circuit is provided on the motor vehicle, one branch of the high-voltage circuit is provided with a boost DC, and a high-voltage component is provided on the other branch. The high-voltage component is provided in parallel with the boost DC, and the stack is connected to the high-voltage circuit through the boost DC. Therefore, in order to ensure the safety of the motor vehicle, the stack is often not allowed to supply power to the high-voltage circuit when the insulation resistance of the high-voltage circuit is too low. However, in actual applications, components such as radiators and intercoolers in the heat dissipation loop connected to the stack will precipitate ions, resulting in excessively high water conductivity, which will cause the stack insulation resistance to be too low, thereby lowering the insulation resistance of the high-voltage circuit, causing the high-voltage circuit to fail to start, and then causing the motor vehicle to fail to start normally. In the related art, although it is also possible to disconnect the connection between the battery stack and the high-voltage circuit by removing the high-voltage line between the battery stack and the boost DC, and then use the battery stack host computer to start the high-pressure water pump, so that the heat dissipation loop can circulate, thereby reducing the conductivity of the fuel cell system through the deionizer, and then increasing the insulation resistance of the battery stack, so that the detected insulation resistance is above the minimum limit, the high-pressure water pump runs until the insulation resistance of the high-voltage circuit of the whole vehicle is normal, and then the high-pressure water pump is turned off, and the high-voltage line of the battery stack is connected back, and the whole vehicle can be powered on and started normally. Since the motor vehicle is not running every few days, this operation must be performed for the first start to start the normal high voltage and run normally, so the starting process of the motor vehicle is very cumbersome, and the removal of the high-voltage line and the start-up method through the host computer are processed by the background, which has certain safety risks. Therefore, how to solve the problem of being unable to start the motor vehicle due to long-term non-starting is a problem that needs to be solved urgently. Based on this, the embodiment of the present application provides a management method, system and storage medium for a motor vehicle control system, which can solve the problem of being unable to start the motor vehicle due to long-term non-starting.

[0038] Reference Figure 1 As shown, a motor vehicle control system provided by the present application includes:

[0039] A fuel cell module 100, the fuel cell module 100 comprises a fuel cell control module 110, a stack 120, a heat dissipation loop 130 and a deionization branch 140 connected to the heat dissipation loop 130, a high-pressure water pump 150, a radiator 170 and a heater 160 are provided on the heat dissipation loop 130; the output ends of the radiator 170 and the heater 160 are connected to the input end of the stack 120 through the high-pressure water pump 150; the input ends of the radiator 170 and the heater 160 are connected to the output end of the stack 120;

[0040] A high-voltage circuit 200, wherein a controller 300 is disposed between the high-voltage circuit 200 and the fuel cell stack 120, and the controller 300 is used to control the high-voltage circuit 200 to be disconnected or connected to the fuel cell stack 120;

[0041] The fuel cell control module 110 is used to: disconnect the battery stack 120 from the high-voltage circuit 200 through the controller 300; start the high-pressure water pump 150 at the lowest speed and control the coolant flow to the heater 160 to be a first preset value; obtain the cumulative operating time of the high-pressure water pump 150 and determine whether the cumulative operating time meets the preset first condition; when it is determined that the cumulative operating time meets the first condition and the conductivity in the heat dissipation loop 130 is greater than or equal to the high-voltage starting conductivity threshold value, control the increase or decrease of the speed of the high-pressure water pump 150 and return to the step of obtaining the cumulative operating time of the high-pressure water pump 150 until any stop adjustment condition is met, that is, the cumulative operating time is greater than or equal to the first time and the conductivity is less than the high-voltage starting threshold; when the stop start condition is met, turn off the high-pressure water pump 150, and connect the battery stack 120 and the high-voltage circuit 200; and determine whether high voltage electricity is provided to the high-voltage circuit 200 through the battery stack 120 according to the insulation resistance of the high-voltage circuit 200.

[0042] Therefore, by disconnecting the battery stack 120 from the high-voltage circuit 200, the high-pressure water pump 150 can be controlled to start under high pressure while ensuring the safety of the entire vehicle, so that the coolant circulates between the heat dissipation loop 130, the deionization branch 140 and the battery stack 120, thereby achieving the purpose of reducing the conductivity, and then increasing the insulation resistance of the high-voltage circuit 200 by increasing the insulation resistance of the battery stack 120. At the same time, controlling the increase or decrease of the speed of the high-pressure water pump 150 based on the accumulated time and adjustment conditions can reduce energy consumption and further ensure that the high-pressure water pump 150 can operate normally; controlling the increase or decrease of the speed of the high-pressure water pump 150 based on the accumulated time and adjustment conditions can also increase the speed of conductivity reduction by controlling the coolant circulation speed. Therefore, compared with the related art, the embodiment of the present application can improve the starting efficiency under the premise that the motor vehicle cannot be started due to long-term non-starting.

[0043] Heat dissipation loop 130 represents the loop formed by the right pipe.

[0044] The deionization branch 140 is used to remove ions from the coolant flowing through the deionization branch 140. At least one deionizer is provided on the deionization branch 140. The connection relationship between the deionization branch 140 and the heat dissipation loop 130 can be selectively set according to actual needs. For example, Figure 4 As shown, the input end of the deionization branch 140 is connected to the input end of the heat dissipation loop 130 , and the output end of the deionization branch 140 is connected to the input end of the high-pressure water pump 150 .

[0045] The fuel cell control module 110 is used to manage the components on the heat dissipation loop 130 and the deionization branch 140. The fuel cell control module 110 may be an integrated chip or a chip with logic processing functions such as a PLC.

[0046] A flow divider is also provided on the heat dissipation loop 130 to control the flow of the coolant flowing through the heater 160 and the radiator 170 on the heat dissipation loop 130. The flow divider can be a valve such as a three-way valve.

[0047] The controller 300 can be configured as a normally closed contactor or an electrically controlled switch to achieve circuit connectivity. Figure 2 As shown, the controller 300 is configured as a normally closed contactor.

[0048] The minimum speed is the minimum rotation speed supported by the high-pressure water pump 150 .

[0049] The first condition represents the time condition for triggering the high-pressure water pump 150 to adjust the rotation speed, which can be obtained through simulation or historical experience data.

[0050] The first preset value represents the minimum flow rate required to remove ions generated in the branch where the heater 160 is located within the second time period. In some embodiments, the first preset value is the flow rate when the three-way valve is opened at 50%.

[0051] The disconnection or connection control between the stack 120 and the high-voltage circuit 200 can be controlled by the fuel cell control module 110 based on the real-time conductivity in the heat dissipation loop 130 and the insulation resistance of the entire vehicle, or it can be controlled by the fuel cell control module 110 after triggering an external switch.

[0052] A conductivity sensor is also provided on the heat dissipation loop 130 to detect the conductivity in the heat dissipation loop 130 .

[0053] The high-voltage circuit 200 is provided with high-voltage components, such as a motor and the like.

[0054] During the start-up process of the motor vehicle, electricity for some high-voltage components in the fuel cell module 100, such as the high-pressure water pump 150, air compressor, hydrogen pump and other high-voltage components, can be provided by the power battery 430 in the high-voltage circuit 200; thereby further improving the safety of the motor vehicle.

[0055] It is understandable that if Figure 2 As shown, the motor vehicle control system also includes:

[0056] A device controller 410 , the device controller 410 is in communication with the fuel cell control module 110 ;

[0057] The control switch 420 has one end connected to the ground and the other end connected to the device controller 410, so that after detecting that the control switch 420 is closed, the device controller 410 sends a shutdown signal to the fuel cell control module 110 to control the controller 300 to be disconnected.

[0058] The device controller 410 is used to manage the high-voltage components on the high-voltage circuit 200 and other components on the motor vehicle that need to be controlled, such as speakers, etc. The device controller 410 and the fuel cell control module 110 can be connected via a CAN bus or in other ways, and this is not limited in this embodiment of the present application.

[0059] The control switch 420 is a mechanical switch. When the control switch 420 is closed, the device controller 410 detects grounding and sends a shutdown signal to the fuel cell control module 110. When the control switch 420 is open, the device controller 410 does not detect the ground signal and sends a recovery signal to the fuel cell control module 110.

[0060] For example, Figure 2 As shown, taking the high-voltage circuit 200 provided with a high-voltage component, a boost DC and a power battery 430 as an example, the high-voltage component is connected in parallel with the boost DC, and the power battery 430 and the boost DC can jointly supply power to the high-voltage component. After the control switch 420 is closed, the fuel cell control module 110 controls the normally closed contactor to close, at which time the stack 120 is disconnected from the boost DC, thereby disconnecting the stack 120 from the high-voltage circuit 200, and at this time, the power battery 430 provides a high-voltage power supply to the high-pressure water pump 150. Therefore, the high-pressure water pump 150 can start normally.

[0061] Among them, Figure 2The power battery 430 shown generally has two functions: 1. When the fuel cell module 100 is just started, the high voltage electricity of the fuel cell module 100, such as the high-pressure water pump 150, the air compressor, the hydrogen pump, etc., needs to be provided by the power battery 430. 2. The response speed of the stack 120 is slow when the power is changed, and the power battery 430 responds quickly. The power battery 430 provides the electric power required for the rapid response to the power change condition.

[0062] The management method of the motor vehicle control system of the present application is applied to Figure 1 The motor vehicle control system shown, such as Figure 3 As shown, according to a management method of a motor vehicle control system provided by the present application, the method includes:

[0063] Step S100, disconnecting the battery stack from the high-voltage circuit;

[0064] Step S200, starting the high-pressure water pump at the lowest speed and controlling the coolant flow to the heater to be a first preset value, so that the coolant circulates in the heat dissipation loop, the deionization branch, and the battery stack;

[0065] Step S300, obtaining the accumulated running time of the high-pressure water pump and determining whether the accumulated running time meets a preset first condition;

[0066] Step S400, when it is determined that the accumulated running time meets the first condition and the conductivity in the heat dissipation loop is greater than or equal to the high-voltage starting conductivity threshold value, control the increase or decrease of the rotation speed of the high-pressure water pump and return to the step of obtaining the accumulated running time of the high-pressure water pump until any one of the stop adjustment conditions of the accumulated running time being greater than or equal to the first time and the conductivity being less than the high-voltage starting threshold is met;

[0067] Step S500: When the stop adjustment condition is met, the high-pressure water pump is turned off, and the high-pressure circuits of the battery stack and the motor vehicle are connected;

[0068] Step S600: Determine whether to provide high voltage electricity to the high voltage circuit through the battery stack according to the insulation resistance of the high voltage circuit.

[0069] Therefore, by disconnecting the battery stack from the high-voltage circuit, the high-pressure water pump can be controlled to start under high pressure while ensuring the safety of the entire vehicle, so that the coolant circulates between the heat dissipation loop, the deionization branch and the battery stack, thereby achieving the purpose of reducing the conductivity, and then increasing the insulation resistance of the high-voltage circuit by increasing the insulation resistance of the battery stack. At the same time, controlling the increase or decrease of the speed of the high-pressure water pump based on the accumulated time and adjustment conditions can reduce energy consumption and further ensure that the high-pressure water pump can operate normally; controlling the increase or decrease of the speed of the high-pressure water pump based on the accumulated time and adjustment conditions can also increase the speed of conductivity reduction by controlling the coolant circulation speed. Therefore, compared with the related art, the embodiment of the present application can improve the starting efficiency under the premise that the motor vehicle cannot be started due to long-term non-starting.

[0070] Steps S100 to S600 may be executed by a battery control module.

[0071] Step S100 can automatically detect the conductivity in the heat dissipation loop and the insulation resistance in the high-voltage circuit through the battery module when the motor vehicle is started, so as to determine whether it is necessary to disconnect the battery stack from the high-voltage circuit. The disconnection operation of the battery stack from the high-voltage circuit can also be triggered by controlling the switch. A controller is provided between the battery stack and the high-voltage circuit. The battery stack can be disconnected from the high-voltage circuit by disabling the controller, and the battery stack can be connected to the high-voltage circuit by enabling the controller.

[0072] The conductivity threshold value indicates the maximum conductivity allowed in the heat dissipation loop when the motor vehicle is started. The conductivity can be detected in real time by a conductivity sensor.

[0073] The first time length represents the maximum time length allowed for the motor vehicle startup process to continue, and when the time length is exceeded, it is determined that the startup has failed.

[0074] The power consumed by the high-pressure water pump at different speeds is different, and the distribution density of ions will change accordingly with the flow rate in the heat dissipation loop. Therefore, by continuously adjusting the speed of the high-pressure water pump, a higher ion removal efficiency can be achieved while reducing power.

[0075] The increase or decrease of the speed of the high-pressure water pump includes increasing the speed and decreasing the speed. Reducing the speed can ensure that the pressure at the input end of the fuel cell stack meets the requirements, thereby extending the service life of the fuel cell stack.

[0076] For example, Figure 4 Take the partial structure of the battery module as an example. Figure 4As shown, the heat dissipation loop 130 is provided with a heater 160, an electrically controlled three-way valve, a radiator 170, a conductivity sensor, a high-pressure water pump 150, a filter and a pressure sensor. Along the coolant flow direction of the heat dissipation loop 130, the electrically controlled three-way valve, the radiator 170, the conductivity sensor, the high-pressure water pump 150, the filter and the pressure sensor are arranged in sequence, the heater 160 and the radiator 170 are arranged in parallel, and the two ends of the heater 160 are respectively connected to an output end of the electrically controlled three-way valve and an input end of the high-pressure water pump 150. A deionizer 180 is provided on the deionization branch 140, and the input end of the deionizer 180 is connected to the output end of the battery stack 120, and the output end of the deionizer 180 is connected to the input end of the high-pressure water pump 150. After step S100, Figure 4 The high-pressure water pump 150 in the system is started at the lowest speed, and the opening of the electronically controlled three-way valve is adjusted to control the cooling flow to the heater 160 to be the first preset value. Step S300 can be executed by starting a timer cycle, so that when the conductivity is less than the high-pressure start threshold, step S500 can be entered in advance.

[0077] The first condition, the first duration, the adjustment condition, and the high-voltage starting threshold can all be obtained based on simulation experiments.

[0078] When the accumulated running time is greater than or equal to the first time and the conductivity is greater than or equal to the high-voltage starting conductivity threshold, an early warning will be reported.

[0079] It is understandable that determining in step S400 that the accumulated running time satisfies the first condition includes:

[0080] In the case where the high-pressure water pump does not increase its speed, when the accumulated running time is greater than a preset second time period, it is determined that the accumulated running time meets the first condition; and the second time period is less than the first time period;

[0081] In the case where the high-pressure water pump increases its overspeed, when the cumulative running time is greater than the third time period and the difference between the cumulative running time and the previous cumulative time that met the first condition is greater than the preset interval time period, it is determined that the cumulative running time meets the first condition; the difference between the third time period and the second time period is greater than the interval time period.

[0082] For example, assuming that the third duration is ; The second duration is ; Indicates the interval duration. The cumulative running time is ; Indicates the cumulative running time of the current statistics. Indicates the cumulative running time when the first condition was met last time; in some embodiments, when the high-pressure water pump increases the overspeed, and ; then the cumulative running time If the first condition is met, then in other embodiments, when the high-pressure water pump increases the speed, ; then it is determined that the accumulated running time satisfies the first condition; wherein n is an integer greater than or equal to 0, and n represents the number of adjustments.

[0083] It is understandable that when the accumulated running time is greater than the third time period and the difference between the accumulated running time and the accumulated time period of the previous speed increase or decrease is greater than the preset interval time period, it is determined that the accumulated running time meets the first condition, including:

[0084] Get the number of adjustments, the initial value of the number of adjustments is 0;

[0085] Determine the adjustment interval based on the number of adjustments, the interval duration, and the third duration;

[0086] When the accumulated running time is greater than the adjustment interval, it is determined that the accumulated running time satisfies the first condition and the adjustment times are increased by 1 and then the adjustment times are updated.

[0087] For example, assuming the number of adjustments is n, the adjustment interval is ;when , it is determined that the accumulated duration meets the first condition, and n=n+1 is updated.

[0088] It is understandable that the control of the increase or decrease of the rotation speed of the high-pressure water pump in step S400 includes:

[0089] Obtain the first speed of the high-pressure water pump at the current moment;

[0090] When the first speed is less than the maximum speed of the water pump, the high-pressure water pump is controlled to rotate at the maximum speed of the water pump;

[0091] When the first speed is less than the maximum speed of the water pump, a speed step is obtained and the first speed is increased based on the speed step to obtain a second speed;

[0092] Obtaining an inlet pressure value of the fuel cell stack when the fuel cell stack moves at a second rotation speed;

[0093] When the inlet pressure value is greater than the pressure threshold value, the maximum speed of the water pump is updated to the first speed, and the high-pressure water pump is controlled to rotate at the maximum speed of the water pump.

[0094] As the speed of the high-pressure water pump increases, the inlet pressure of the fuel cell stack 120 will also increase. When the pressure exceeds a certain value, it will affect the life of the fuel cell stack 120. Therefore, the maximum speed of the high-pressure water pump is limited by increasing the inlet pressure value, thereby protecting the fuel cell stack 120.

[0095] For example, Figure 4 As shown, a pressure sensor is provided at the input end of the fuel cell stack 120 , so that the inlet pressure value of the fuel cell stack 120 can be detected in real time.

[0096] The speed step represents the speed value increased each time, and can be selectively set according to actual needs. The embodiment of the present application does not limit this.

[0097] For example, in some embodiments, if the accumulated running time satisfies the first condition and the conductivity is greater than or equal to the high-voltage start conductivity threshold value, it indicates that it is desired to increase the speed of the high-pressure water pump. When the high-pressure water pump speed is expected to increase, based on the current speed The updated speed obtained by increasing the speed step is ; and detect the inlet pressure value in real time. When the inlet pressure value is greater than the pressure threshold value, the speed of the high-pressure water pump is adjusted to , otherwise keep ; and maintain after this time In other embodiments, the rotation speed can also be When the high-pressure water pump speed is expected to increase, based on the current speed The updated speed obtained by increasing the speed step is , and Run, in When judging that the high-pressure water pump speed is expected to be increased, the current inlet pressure value is first judged to be greater than the pressure threshold value. If it is greater, it will be adjusted to , otherwise it will be updated based on the speed step .

[0098] It is understandable that after obtaining the accumulated running time of the high-pressure water pump in step S300, the method further includes:

[0099] When the accumulated running time meets the first condition and the conductivity in the heat dissipation loop is greater than or equal to the high-voltage starting conductivity threshold value, the coolant flow to the heater is controlled to be a second preset value; the second preset value is less than the first preset value;

[0100] When the accumulated running time is greater than or equal to the first time period or the conductivity is less than the high-voltage start threshold, the coolant flow to the heater is adjusted to a maximum.

[0101] Since the ion precipitation rate of the heater 160 is small, after the coolant passing through the heater 160 is deionized for a second period of time, only a small amount of flow is needed to flow through the branch where the heater 160 is located, and the main flow is allowed to flow through the radiator 170. Since the flow resistance of the branch where the heater 160 is located is large, the purpose of increasing the main flow of the water pump can be achieved by controlling the coolant flow.

[0102] For example, Figure 4Taking the structure in as an example, the opening of the electric three-way valve can be controlled at 50%, so that the cooling flow to the heater 160 is controlled at a first preset value. The opening of the electric three-way valve can be controlled at 90%, so that the cooling flow to the heater 160 is controlled at a second preset value, and the coolant flow to the heater is adjusted to the maximum.

[0103] It is understandable that step S100, disconnecting the battery stack from the high-voltage circuit, includes:

[0104] Obtain the conductivity in the heat dissipation loop and the insulation resistance of the motor vehicle control system;

[0105] When the conductivity is greater than or equal to the high-voltage starting conductivity threshold value and the insulation resistance is less than or equal to the preset high-voltage resistance starting threshold value, the controller between the battery stack and the high-voltage circuit is controlled to disconnect to disconnect the battery stack from the high-voltage circuit of the motor vehicle.

[0106] Since the conductivity in the heat dissipation loop is not completely equivalent to the insulation resistance, in order to further ensure the safety of motor vehicle starting, it is necessary to increase the judgment of the insulation resistance.

[0107] By controlling the on and off of the battery stack and the high-voltage circuit based on real-time detection data, no human intervention is required and the control is more intelligent.

[0108] It is understandable that if Figure 2 As shown, the motor vehicle control system also includes a device controller 410 and a control switch 420 electrically connected to the device controller 410, which disconnects the battery stack 120 from the high-voltage circuit 200, including:

[0109] The receiving device controller 410 detects a closing signal generated by closing the control switch 420;

[0110] The controller 300 controls the disconnection between the fuel cell stack 120 and the high-voltage circuit 200 to disconnect the fuel cell stack 120 from the high-voltage circuit 200 .

[0111] By setting the control switch 420, a protection measure can be provided to further ensure the safety of starting the motor vehicle when the system is abnormal.

[0112] In some embodiments, the control switch 420 may not be set. In other embodiments, the control switch 420 may be set and the controller 300 is only triggered to turn on and off by the deionization switch. In other embodiments, the control switch 420 may be set and the controller 300 is turned on and off by both the control switch 420 and automatic detection.

[0113] For example, refer to Figure 5As shown, the management method in the embodiment of the present application is described, wherein the opening of the electric-controlled three-way valve corresponding to the first preset value is 50%, and the opening of the electric-controlled three-way valve corresponding to the second preset value is 90%; the first time length is set to 30min; the second time length is set to 5min; the third time length is set to 10min, the conductivity threshold value is set to 15μs / cm; the speed step is set to 1000rpm; the interval time length is set to 5min; the pressure threshold value is set to 250Kpa; the high-voltage resistance start threshold value is set to 0.3MΩ, then the control process is as follows:

[0114] S1. After the vehicle is powered on, high voltage is not applied first. The insulation resistance of the high-voltage circuit is detected first, and the conductivity of the fuel cell water circuit is detected by the conductivity sensor. If the insulation resistance is ≤0.3MΩ and the conductivity is ≥15μs / cm (the setting values ​​of different models may be different, depending on the actual situation), the normally closed contactor is triggered to disconnect. After the normally closed contactor is disconnected, the high-voltage circuit is disconnected from the battery stack. Then the device controller sends a command to the fuel cell control module through CAN communication, allowing the fuel cell control module to control the opening of the electronically controlled three-way valve to 50%, and the fuel cell control module starts the high-pressure water pump to run at the lowest speed, and enters step S2; if the insulation resistance is >0.3MΩ, the vehicle can enter the high-voltage process normally, otherwise it is not allowed to apply high voltage.

[0115] S2, judge the conductivity is less than 15μs / cm. If it is not satisfied, the electric control three-way valve maintains 50% opening, the high-pressure water pump maintains speed operation, and enters the next step S3. If it is satisfied, the electric control three-way valve is opened to 50% and adjusted to the default 0%, delaying 5S, the high-pressure water pump is turned off, the normally closed contactor is closed, and then the insulation resistance is judged to be greater than 0.3MΩ. If it is satisfied, the vehicle enters the normal high-voltage process; if it is not satisfied, high voltage is not allowed.

[0116] S3. Determine whether the accumulated running time is greater than 5 minutes. If so, proceed to step S4. If not, return to step S2.

[0117] S4, if the conductivity is ≥15μs / cm, the fuel cell control module controls the opening of the electronically controlled three-way valve to 90% (because the ion precipitation rate of the heater is small, after deionization through this branch in the first 5 minutes, only a small amount of flow will flow through this branch in the future, allowing the main flow to flow through the radiator. Due to the large flow resistance of the heater branch, this opening can also increase the main flow of the water pump). After a delay of 5S, the speed of the high-pressure water pump increases by 1000rpm, and the process goes to step S5;

[0118] If the conductivity is less than 15μs / cm, the opening of the electronically controlled three-way valve is opened to 50% and then adjusted to the default 0%, with a delay of 5S, the high-pressure water pump is turned off, and the normally closed contactor is closed. Then, it is determined that the insulation resistance is greater than 0.3MΩ. If it meets the requirement, the vehicle will enter the normal high-voltage process; if not, high voltage is not allowed.

[0119] S5. If the stack inlet pressure is greater than 250 Kpa, the speed of the high-pressure water pump is reduced to the speed V1 before the increase in S4, and the process proceeds to step S8;

[0120] If the inlet pressure of the battery stack is ≤250Kpa, the high-pressure water pump maintains the speed V2 increased in S4 and enters step S6. (Increasing the speed of the high-pressure water pump and thus increasing the flow rate can increase the deionization effect, but the water pump speed cannot be increased blindly, because the speed of the high-pressure water pump increases, and the inlet pressure of the battery stack will also increase. When the pressure exceeds a certain value, it will affect the life of the battery stack, so it is necessary to increase the pressure judgment to limit the maximum speed of the high-pressure water pump to protect the battery stack).

[0121] S6. If the conductivity is ≥15μs / cm, the opening of the electronically controlled three-way valve is maintained at 90%, the high-pressure water pump maintains a speed of V2, and the process proceeds to step S7.

[0122] If the conductivity is less than 15μs / cm, the opening of the electronically controlled three-way valve 1 is opened to 50% and adjusted to the default 0%, with a delay of 5S, the high-pressure water pump is turned off, and the vehicle controller controls the normally closed contactor to close. Then, it is judged that the insulation resistance is greater than 0.3MΩ. If it meets the requirement, the vehicle will enter the normal high-voltage process; if not, high voltage is not allowed.

[0123] S7. If the accumulated running time is greater than (10+5*X) min (X is initially 0), proceed to step S11 and accumulate the number of times X;

[0124] If the accumulated running time is ≤(10+5*X)min, return to step S9.

[0125] S8. If the operation time of the high-pressure water pump is ≤30 min, proceed to step S10;

[0126] If the running time of the high-pressure water pump is greater than 30 minutes, a "deionizer failure" fault will be reported, and the opening of the electronically controlled three-way valve will be adjusted to the default 0%, with a delay of 5 seconds. The high-pressure water pump will be turned off, the normally closed contactor will be closed, and high pressure will not be allowed.

[0127] S9, if the operation time of the high-pressure water pump is ≤30min, proceed to step S6;

[0128] If the running time of the high-pressure water pump is greater than 30 minutes, a "deionizer failure" fault will be reported, and the opening of the electronically controlled three-way valve will be adjusted to the default 0%, with a delay of 5 seconds. The high-pressure water pump will be turned off, the normally closed contactor will be closed, and high pressure will not be allowed.

[0129] S10, if the conductivity is ≥15μs / cm, the opening of the electronically controlled three-way valve is maintained at 90%, and the high-pressure water pump maintains a speed of V1 (i.e., the maximum speed when the pressure is <250Kpa), and enters step S8.

[0130] If the conductivity is less than 15μs / cm, the opening of the electronically controlled three-way valve 1 is opened to 50% and adjusted to the default 0%, with a delay of 5S, the high-pressure water pump is turned off, and the vehicle controller controls the normally closed contactor to close. Then, it is judged that the insulation resistance is greater than 0.3MΩ. If it meets the requirement, the vehicle will enter the normal high-voltage process; if not, high voltage is not allowed.

[0131] S11, the high-pressure water pump speed increases by 1000 rpm, and the process returns to step S5.

[0132] It is understandable that if Figure 6 As shown, an embodiment of the present application further provides an electronic device, the electronic device comprising:

[0133] The processor 701 may be implemented by a general-purpose CPU (Central Processing Unit), a microprocessor, an application-specific integrated circuit (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 the present application;

[0134] The memory 702 can be implemented in the form of a read-only memory (ROM), a static storage device, a dynamic storage device, or a random access memory (RAM). The memory 702 can store an operating system and other application programs. When the technical solution provided in the embodiment of this specification is implemented by software or firmware, the relevant program code is stored in the memory 702, and the processor 701 calls and executes the management method of the motor vehicle control system of the embodiment of this application;

[0135] Input / output interface 703, used to implement information input and output;

[0136] Communication interface 704, used to realize communication interaction between the device and other devices, which can be realized through wired mode (such as USB, network cable, etc.) or wireless mode (such as mobile network, WIFI, Bluetooth, etc.);

[0137] A bus 705 that transmits information between various components of the device (e.g., the processor 701, the memory 702, the input / output interface 703, and the communication interface 704);

[0138] The processor 701 , the memory 702 , the input / output interface 703 and the communication interface 704 are connected to each other in communication within the device via a bus 705 .

[0139] An embodiment of the present application further provides a storage medium, which is a computer-readable storage medium and stores a computer program. When the computer program is executed by a processor, the management method of the above-mentioned motor vehicle control system is implemented.

[0140] The memory, as a non-transient computer-readable storage medium, can be used to store non-transient software programs and non-transient computer executable programs. In addition, the memory may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage device. In some embodiments, the memory may optionally include a memory remotely disposed relative to the processor, and these remote memories may be connected to the processor via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0141] The embodiments described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. Those skilled in the art will appreciate that with the evolution of technology and the emergence of new application scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0142] Those skilled in the art will appreciate that the technical solutions shown in the figures do not constitute a limitation on the embodiments of the present application, and may include more or fewer steps than shown in the figures, or a combination of certain steps, or different steps.

[0143] The device embodiments described above are merely illustrative, and the units described as separate components may or may not be physically separated, that is, they may be located in one place or distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0144] Those skilled in the art will appreciate that all or some of the steps in the methods disclosed above, and the functional modules / units in the systems and devices may be implemented as software, firmware, hardware, or a suitable combination thereof.

[0145] The terms "first", "second", "third", "fourth", etc. (if any) in the specification of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0146] It should be understood that in the present application, "at least one (item)" means one or more, and "plurality" means two or more. "And / or" is used to describe the association relationship of associated objects, indicating that three relationships may exist. For example, "A and / or B" can mean: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally indicates that the objects associated before and after are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or multiple.

[0147] In the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the above units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0148] The units described above as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0149] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0150] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including multiple instructions to enable a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, referred to as ROM), random access memory (Random Access Memory, referred to as RAM), disk or optical disk and other media that can store programs.

[0151] The preferred embodiments of the present invention are described above with reference to the accompanying drawings, but the scope of the rights of the present invention is not limited thereto. Any modification, equivalent substitution and improvement made by a person skilled in the art without departing from the scope and essence of the present invention should be within the scope of the rights of the present invention.

Claims

1. A management method for a motor vehicle control system, characterized in that: The motor vehicle control system includes a fuel cell module and a high-voltage circuit. The fuel cell module includes a stack, a heat dissipation loop, and a deionization branch connected to the heat dissipation loop. The heat dissipation loop is provided with a high-pressure water pump, a radiator, and a heater. The output ends of the radiator and the heater are connected to the input end of the stack through the high-pressure water pump. The input ends of the radiator and the heater are both connected to the output end of the stack; the stack is used to supply power to the high-voltage circuit, and the method includes: Disconnecting the battery stack from the high-voltage circuit; Starting the high-pressure water pump at the lowest speed and controlling the coolant flow to the heater to be a first preset value, so that the coolant circulates in the heat dissipation loop, the deionization branch, and the fuel cell stack; Obtaining the accumulated running time of the high-pressure water pump and determining whether the accumulated running time meets a preset first condition; When it is determined that the accumulated running time satisfies the first condition and the conductivity in the heat dissipation loop is greater than or equal to the high-voltage starting conductivity threshold value, the speed of the high-pressure water pump is controlled to increase or decrease and the step of obtaining the accumulated running time of the high-pressure water pump is returned to until any one of the stop adjustment conditions of the accumulated running time being greater than or equal to the first time length and the conductivity being less than the high-voltage starting conductivity threshold value is satisfied; When the stop adjustment condition is met, the high-pressure water pump is turned off, and the battery stack and the high-voltage circuit are connected; According to the insulation resistance of the high-voltage circuit, determining whether high voltage electricity is provided to the high-voltage circuit through the battery stack; The step of determining whether the accumulated running time satisfies the first condition includes: In the case where the high-pressure water pump does not increase its rotation speed, when the accumulated operation time is greater than a preset second time, it is determined that the accumulated operation time satisfies the first condition; and the second time is less than the first time; In the case where the high-pressure water pump increases the overspeed, when the accumulated running time is greater than the third time period and the difference between the accumulated running time and the accumulated time that last satisfied the first condition is greater than the preset interval time period, it is determined that the accumulated running time satisfies the first condition; and the difference between the third time period and the second time period is greater than the interval time period; Wherein, disconnecting the battery stack from the high-voltage circuit includes: Acquiring the conductivity in the heat dissipation loop and the insulation resistance of the motor vehicle control system; When the conductivity is greater than or equal to the high-voltage starting conductivity threshold and the insulation resistance is less than or equal to the preset high-voltage resistance starting threshold, the controller between the battery stack and the high-voltage circuit is controlled to disconnect to disconnect the battery stack from the high-voltage circuit.

2. The management method of a motor vehicle control system according to claim 1, characterized in that: When the accumulated running time is greater than the third time period and the difference between the accumulated running time and the accumulated time period of the previous speed increase or decrease is greater than the preset interval time period, determining that the accumulated running time meets the first condition includes: Get the number of adjustments, where the initial value of the number of adjustments is 0; Determine an adjustment interval based on the number of adjustments, the interval duration, and the third duration; When the accumulated running time is greater than the adjustment interval, it is determined that the accumulated time meets the first condition, and the adjustment times are increased by 1 and then updated.

3. The management method of a motor vehicle control system according to claim 1, characterized in that: The controlling of the increase or decrease of the rotation speed of the high-pressure water pump comprises: Obtaining a first rotational speed of the high-pressure water pump at a current moment; When the first speed is less than the maximum speed of the water pump, the high-pressure water pump is controlled to rotate at the maximum speed of the water pump; When the first speed is less than the maximum speed of the water pump, obtaining a speed step and increasing the first speed based on the speed step to obtain a second speed; Acquire an inlet pressure value of the fuel cell stack when the fuel cell stack moves at the second speed; When the inlet pressure value is greater than the pressure threshold value, the maximum speed of the water pump is updated to the first speed, and the high-pressure water pump is controlled to rotate at the maximum speed of the water pump.

4. The management method of a motor vehicle control system according to claim 1, characterized in that: After obtaining the accumulated running time of the high-pressure water pump, the method further includes: When the accumulated running time meets the first condition and the conductivity in the heat dissipation loop is greater than or equal to the high-voltage starting conductivity threshold value, the coolant flow to the heater is controlled to be a second preset value; the second preset value is less than the first preset value; When the accumulated operating time is greater than or equal to the first time or the conductivity is less than the high-voltage starting conductivity threshold value, the coolant flow to the heater is adjusted to a maximum.

5. The management method of a motor vehicle control system according to claim 1, characterized in that: The motor vehicle control system further includes a device controller and a control switch electrically connected to the device controller, wherein disconnecting the battery stack from the high-voltage circuit includes: Receiving a closing signal generated by the device controller detecting that the control switch is closed; A controller between the battery stack and the high-voltage circuit is controlled to be disconnected to disconnect the battery stack from the high-voltage circuit.

6. A motor vehicle control system, characterized in that: include: A fuel cell module, the fuel cell module comprising a fuel cell control module, a stack and a heat dissipation loop, the heat dissipation loop being provided with a high-pressure water pump, a radiator and a heater; the output ends of the radiator and the heater are both connected to the input end of the stack through the high-pressure water pump; the input ends of the radiator and the heater are both connected to the output end of the stack; A high-voltage circuit, wherein a controller is provided between the high-voltage circuit and the fuel cell stack, and the controller is used to control the high-voltage circuit to be disconnected or connected to the fuel cell stack; A deionization branch, the deionization branch is connected to the heat dissipation loop; The fuel cell control module executes the method according to any one of claims 1 to 5.

7. The vehicle control system according to claim 6, characterized in that: Also includes A device controller, the device controller being in communication with the fuel cell control module; A control switch, one end of which is grounded, and the other end of which is connected to the device controller, so that after the device controller detects that the control switch is closed, it sends a shutdown signal to the fuel cell control module to control the device controller to disconnect.

8. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the management method of a motor vehicle control system according to any one of claims 1 to 5 is implemented.

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