Battery time-sharing power supply method and device for automobile starting scene in extremely low temperature environment, storage medium and terminal

Abstract

A battery time-sharing power supply method and device for a vehicle starting scene in an extremely low temperature environment, a storage medium and a terminal, the vehicle comprising a plurality of power consumption modules, the method comprising: recording a starting duration from the power-on of the whole vehicle; and controlling the battery to supply power to the corresponding power consumption module when the starting duration reaches a preset time, wherein the preset time corresponds to the power consumption module one by one, and the preset time corresponding to at least one power consumption module is different from the preset time corresponding to other power consumption modules. Through the scheme, the maximum instantaneous pulse of the battery output can be effectively reduced, thereby reducing the failure probability of vehicle starting in an extremely low temperature environment.

Description

Technical Field

[0001] This invention relates to the field of fuel cell electric vehicle technology, and more specifically to a battery time-sharing power supply method and device, storage medium, and terminal for vehicle starting scenarios in extremely low temperature environments. Background Technology

[0002] A fuel cell electric vehicle (FCEV) is a hybrid electric vehicle powered by both a fuel cell and a battery. During the vehicle startup phase, before the fuel cell (FC) system supplies power to the outside world, the power required for the fuel cell itself to start, the DC-DC converter (Direct Current-to-Direct Current converter), and the heating module to start is obtained from the high voltage of the vehicle's battery.

[0003] If the above three power modules start at the same time, such as Figure 1 As shown in the circled area, the superposition of surge currents results in a very large maximum instantaneous pulse for the battery. Due to factors such as protection devices, the battery's output capacity (e.g., discharge capacity) is throttled at extremely low temperatures, which makes... Figure 1 The extremely large instantaneous pulse shown is very likely to cause the car to fail to start. Summary of the Invention

[0004] The technical problem solved by this invention is how to reduce the maximum instantaneous pulse output of the battery in order to reduce the probability of vehicle starting failure in extremely low temperature environments.

[0005] To address the aforementioned technical problems, this invention provides a battery time-sharing power supply method for vehicle starting scenarios in extremely low temperature environments. The vehicle includes multiple power-consuming modules. The method includes: recording the starting time from the moment the vehicle is powered on; and controlling the battery to supply power to the corresponding power-consuming module when the starting time reaches a preset time. The preset time corresponds one-to-one with each power-consuming module, and the preset time corresponding to at least one power-consuming module is different from the preset time corresponding to other power-consuming modules.

[0006] Optionally, the power module includes at least a fuel cell, a heating module, and a DC-DC module.

[0007] Optionally, the preset time corresponding to the DC-DC module is shorter than the preset time corresponding to other power modules.

[0008] Optionally, the preset time corresponding to the DC-DC module is the shortest, and the preset time corresponding to the fuel cell is the longest.

[0009] Optionally, the heating module is used to heat the battery.

[0010] Optionally, some of the multiple power modules may correspond to the same preset time.

[0011] Optionally, the number of power modules corresponding to the same preset time is determined based on the maximum instantaneous pulse that the battery can tolerate.

[0012] Optionally, when the startup time reaches a preset time, before controlling the battery to supply power to the corresponding power module, the method further includes: detecting whether the corresponding power module has been started; when the detection result is that it has not been started, controlling the battery to supply power to the corresponding power module.

[0013] Optionally, the vehicle is a fuel cell electric vehicle.

[0014] Optionally, the temperature range of the extremely low temperature environment is -20°C to -30°C.

[0015] To address the aforementioned technical problems, this invention also provides a battery time-sharing power supply device for vehicle starting scenarios in extremely low temperature environments. The vehicle includes multiple power-consuming modules, and the device includes: a recording module for recording the starting time from the moment the vehicle is powered on; and a control module for controlling the battery to supply power to the corresponding power-consuming module when the starting time reaches a preset time. The preset time corresponds one-to-one with each power-consuming module, and the preset time corresponding to at least one power-consuming module is different from the preset time corresponding to other power-consuming modules.

[0016] To address the aforementioned technical problems, embodiments of the present invention also provide a storage medium storing a computer program thereon, wherein the computer program is executed by a processor to perform the steps of the above-described method.

[0017] To address the aforementioned technical problems, this invention also provides a terminal, including a memory and a processor. The memory stores a computer program that can run on the processor, and the processor executes the steps of the above-described method when running the computer program.

[0018] Compared with the prior art, the technical solution of the embodiments of the present invention has the following beneficial effects:

[0019] This invention provides a time-sharing battery power supply method for vehicle starting in extremely low temperature environments. The vehicle includes multiple electrical modules. The method includes: recording the starting time from the moment the vehicle is powered on; and controlling the battery to supply power to the corresponding electrical module when the starting time reaches a preset time. The preset time corresponds one-to-one with each electrical module, and the preset time for at least one electrical module is different from the preset times for other electrical modules. Compared to existing technologies where the battery needs to supply power to all electrical modules simultaneously during vehicle starting in extremely low temperature environments, this implementation method staggers the timing of battery power supply to each electrical module by setting different preset times for different modules, thereby staggering the instantaneous pulses when the battery supplies power to each electrical module. This effectively reduces the maximum instantaneous pulse output by the battery, thus reducing the probability of vehicle starting failure in extremely low temperature environments. Attached Figure Description

[0020] Figure 1 This is a graph showing the trend of battery output power changing over time during car startup in existing technologies;

[0021] Figure 2 This is a flowchart of a battery time-sharing power supply method for a car starting scenario in an extremely low temperature environment according to an embodiment of the present invention;

[0022] Figure 3 This is a graph showing the trend of battery output power changing over time during vehicle startup using this implementation scheme;

[0023] Figure 4 This is a schematic diagram of a battery time-sharing power supply device for automobile starting in extremely low temperature environments, according to an embodiment of the present invention. Detailed Implementation

[0024] As described in the background section, in extremely low temperature environments, existing fuel cell electric vehicles require simultaneous power supply to the fuel cell, heating module, and DC-DC module during startup, resulting in a very large maximum instantaneous pulse from the battery. However, the battery's output capacity is limited in extremely low temperature environments, and an excessively large maximum instantaneous pulse can easily cause the vehicle to fail to start.

[0025] To address the aforementioned technical problems, this invention provides a battery time-sharing power supply method for vehicle starting scenarios in extremely low temperature environments. The vehicle includes multiple power-consuming modules. The method includes: recording the starting time from the moment the vehicle is powered on; and controlling the battery to supply power to the corresponding power-consuming module when the starting time reaches a preset time. The preset time corresponds one-to-one with each power-consuming module, and the preset time corresponding to at least one power-consuming module is different from the preset time corresponding to other power-consuming modules.

[0026] This implementation scheme staggers the timing of battery power supply to different electrical modules by setting different preset times for each module, thereby avoiding the instantaneous pulses when the battery supplies power to the vehicle's electrical modules. This effectively reduces the maximum instantaneous pulse output from the battery, thus lowering the probability of vehicle starting failure in extremely low temperature environments.

[0027] To make the above-mentioned objectives, features and beneficial effects of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0028] Figure 2 This is a flowchart of a battery time-sharing power supply method for a car starting scenario in an extremely low temperature environment, according to an embodiment of the present invention.

[0029] This implementation scheme can be executed by the vehicle's overall controller, such as the vehicle's HV-ECU. The vehicle is a fuel cell electric vehicle, driven collaboratively by the battery and the fuel cell.

[0030] The vehicle may include multiple electrical modules. This embodiment mainly focuses on the electrical modules that need to be started as quickly as possible when the vehicle starts. For example, the electrical modules may include a fuel cell, a heating module, and a DC-DC converter.

[0031] The fuel cell is powered by the battery when it is turned on, and then supplies power to other electrical modules of the vehicle after it is turned on.

[0032] The DC-DC module may include a DC-DC module integrated into a 3-in-1 module of a vehicle, or a DC-DC module integrated into a vehicle's power control unit (PCU).

[0033] The heating module is used to heat the battery in extremely low temperature environments to improve the battery's charge and discharge performance. For example, the heating module can be a positive temperature coefficient (PTC) heater.

[0034] The temperature range of the extremely low temperature environment can be from -20℃ to -30℃.

[0035] Specifically, refer to Figure 2 The battery time-sharing power supply method for automobile starting scenarios in extremely low temperature environments described in this embodiment may include the following steps:

[0036] Step S101: Record the startup duration from the moment the vehicle is powered on;

[0037] Step S102: When the startup duration reaches a preset time, control the battery to supply power to the corresponding power module. The preset time corresponds one-to-one with the power module, and the preset time corresponding to at least one power module is different from the preset time corresponding to other power modules.

[0038] In one specific implementation, during step S101, a timer can be started simultaneously with the vehicle's power-on to record the vehicle's startup duration. Furthermore, the HV-ECU can record preset times for each power-consuming module, so that when the timer reaches the preset time, it controls the battery to supply power to the corresponding power-consuming module.

[0039] Next, we will take the staggered start-up of the DC-DC module, fuel cell and heating module as an example to elaborate on this implementation plan.

[0040] Specifically, the preset time for the DC-DC module can be shorter than the preset time for other power modules. That is, the DC-DC module can be the first power module to start after the vehicle is powered on, so that the DC-DC module can start working as soon as possible to supply power to all low-voltage devices in the vehicle.

[0041] Furthermore, the preset time corresponding to the fuel cell can be the longest possible. That is, in step S102, the battery can be controlled to supply power to the DC-DC module, heating module, and fuel cell sequentially, starting the DC-DC module first, then the heating module, and finally the fuel cell. If the fuel cell starts before the heating module, since the fuel cell will generate electricity for a short period after starting in a low-temperature environment, and the charging capacity of the battery is weak, starting the fuel cell first may lead to overcharging and damage to the device life. Therefore, in this specific embodiment, the heating module is started first, so that the heating module can bear a portion of the power generated by the fuel cell.

[0042] For example, the preset time for the DC-DC module can be 1 to 2 seconds, the preset time for the heating module can be about 30 seconds, and the preset time for the fuel cell can be about 90 seconds.

[0043] In one variation, the startup duration can be reset after each power module is started, and correspondingly, the preset time can refer to the startup interval between two power modules that are started sequentially.

[0044] In other words, when the vehicle is powered on, the timer starts counting down. When the startup time reaches the preset time corresponding to the first power module to be started (referred to as power module 1), the battery is controlled to supply power to power module 1. Then, the timer restarts, and when the startup time reaches the preset time corresponding to the second power module to be started (referred to as power module 2), the battery is controlled to supply power to power module 2. This process continues until the last power module is started.

[0045] In one specific implementation, some of the multiple power-consuming modules can correspond to the same preset time. That is, the battery can be controlled to supply power to two or more power-consuming modules simultaneously.

[0046] Specifically, the number of electrical modules corresponding to the same preset time can be determined based on the maximum instantaneous pulse that the battery can tolerate. For example, based on the maximum instantaneous pulse that the battery can tolerate preset in the vehicle system, and the instantaneous pulse that the battery needs to provide when each electrical module starts, the number of electrical modules that the battery can simultaneously supply power to can be calculated. Correspondingly, these electrical modules that can start simultaneously correspond to the same preset time, so that the battery can supply power to these electrical modules simultaneously.

[0047] In one specific implementation, when the startup time reaches a preset time, before controlling the battery to supply power to the corresponding power module, the method of this embodiment may further include the steps of: detecting whether the corresponding power module has been started; when the detection result is that it has not been started, controlling the battery to supply power to the corresponding power module.

[0048] For example, the startup time is recorded from the moment the car starts. If the startup time exceeds a first preset time t1, it is determined whether the DC-DC module has started. If the DC-DC module has not started at this time, the battery is controlled to supply power to the DC-DC module.

[0049] As the startup time increases, it is determined whether the startup time exceeds a second preset time t2. When the startup time reaches the second preset time t2, it is determined whether the heating module has started. If the heating module has not started at this time, the battery is controlled to supply power to the heating module.

[0050] As the startup time increases, it is determined whether the startup time exceeds a third preset time t3. When the startup time reaches the third preset time t3, it is determined whether the fuel cell has started. If the fuel cell has not started at this time, the battery is controlled to supply power to the fuel cell.

[0051] Figure 1 This is a graph showing the trend of battery output power changing over time during car startup, based on existing technology. Figure 3 This is a graph showing the change in battery output power over time during vehicle startup using this implementation scheme. (See also...) Figure 1 When T1 = T2 = T3, that is, when the DCDC module, the heating module, and the fuel cell are started simultaneously, the output peaks of the battery supplying power to these three modules overlap at the same moment. At this time, the maximum instantaneous pulse of the battery is the sum of the peak output of the DCDC module, the peak output of the heating module, and the peak output of the fuel cell, corresponding to the output power represented by the auxiliary line x2 in the figure.

[0052] In comparison, as Figure 3 shown, when T1 < T2 < T3, that is, when the DCDC module is started first, the heating module is started second, and the fuel cell is started last, due to the inrush current, the output power of the battery will temporarily increase and then tend to be stable. In the Figure 3 scenario shown, by staggering the output peaks of the three modules, the maximum instantaneous pulse of the battery is the sum of the stable output of the DCDC module, the stable output of the heating module, and the peak output of the fuel cell, corresponding to the output power represented by the auxiliary line x1 in the figure. Thus, the power that the battery needs to provide when the three modules are started is reduced.

[0053] Therefore, by adopting this implementation solution, by setting different preset times for different power-consuming modules to stagger the power supply timing of the battery to each power-consuming module, the instantaneous pulses when the battery supplies power to each power-consuming module of the vehicle are staggered. Thus, the maximum instantaneous pulse output by the battery can be effectively reduced, and the probability of vehicle startup failure in an extremely low temperature environment can be reduced.

[0054] Figure 4 FIG. is a schematic structural diagram of a battery time-sharing power supply device for a vehicle startup scenario in an extremely low temperature environment according to an embodiment of the present invention. Those skilled in the art understand that the battery time-sharing power supply device 4 for a vehicle startup scenario in an extremely low temperature environment described in this embodiment can be used to implement the <000\alpha127>method technical solution described in the above-mentioned

[0055] Further, referring to Figure 4 , the battery time-sharing power supply device 4 for a vehicle startup scenario in an extremely low temperature environment described in this embodiment may include: a recording module 41 for recording the startup duration since the vehicle is powered on; a control module 42 for controlling the battery to supply power to the corresponding power-consuming module when the startup duration reaches a preset time, where the preset time corresponds to the power-consuming module one by one, and the preset time corresponding to at least one power-consuming module is different from the preset time corresponding to other power-consuming modules.

[0056] For more content about the working principle and working mode of the battery time-sharing power supply device 4 for a vehicle startup scenario in an extremely low temperature environment, reference can be made to the relevant description in the above Figure 2 , and details are not described herein again.

[0057] Furthermore, embodiments of the present invention also disclose a storage medium storing a computer program thereon, the computer program being executed by a processor as described above. Figure 2 The method described in the illustrated embodiment is a technical solution. Preferably, the storage medium may include a computer-readable storage medium such as non-volatile memory or non-transitory memory. The storage medium may include ROM, RAM, magnetic disk, or optical disk, etc.

[0058] Furthermore, embodiments of the present invention also disclose a terminal, including a memory and a processor, wherein the memory stores a computer program capable of running on the processor, and the processor executes the above-described... Figure 2 The method described in the illustrated embodiment is a technical solution. Specifically, the terminal can be the vehicle controller of the automobile.

[0059] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A battery time-sharing power supply method for vehicle starting scenarios in extremely low temperature environments, wherein the vehicle includes multiple power-consuming modules, characterized in that, The method includes: Record startup duration from the moment the vehicle is powered on; When the startup duration reaches a preset time, the battery is controlled to supply power to the corresponding power module. The preset time corresponds one-to-one with the power module, and the preset time for at least one power module is different from the preset time for other power modules, so as to stagger the instantaneous pulses when the battery supplies power to each power module. The power module includes at least a fuel cell, a heating module, and a DC-DC module. The vehicle is a fuel cell electric vehicle and is driven by the battery and the fuel cell in tandem. The heating module is used to heat the battery in an extremely low temperature environment to improve the battery's charging and discharging performance. The DC-DC module has the shortest preset time, and the fuel cell has the longest preset time.

2. The method according to claim 1, characterized in that, Some of the multiple power modules correspond to the same preset time.

3. The method according to claim 2, characterized in that, The number of power modules corresponding to the same preset time is determined based on the maximum instantaneous pulse that the battery can tolerate.

4. The method according to claim 1, characterized in that, When the startup duration reaches a preset time, before controlling the battery to supply power to the corresponding power module, the method further includes: Check whether the corresponding power module has been started; When the detection result is "not started", the battery is controlled to supply power to the corresponding power module.

5. The method according to claim 1, characterized in that, The temperature range of the extremely low temperature environment is -20℃ to -30℃.

6. A battery time-sharing power supply device for vehicle starting scenarios in extremely low temperature environments, wherein the vehicle includes multiple power-consuming modules, characterized in that, The device includes: The recording module is used to record the startup time from the moment the vehicle is powered on. The control module is used to control the battery to supply power to the corresponding power module when the startup duration reaches a preset time. The preset time corresponds one-to-one with the power module, and the preset time corresponding to at least one power module is different from the preset time corresponding to other power modules, so as to stagger the instantaneous pulses when the battery supplies power to each power module. The power module includes at least a fuel cell, a heating module, and a DC-DC module. The vehicle is a fuel cell electric vehicle and is driven by the battery and the fuel cell in tandem. The heating module is used to heat the battery in an extremely low temperature environment to improve the battery's charging and discharging performance. The DC-DC module has the shortest preset time, and the fuel cell has the longest preset time.

7. A storage medium having a computer program stored thereon, characterized in that, The computer program is executed by the processor to perform the steps of the method according to any one of claims 1 to 5.

8. A terminal comprising a memory and a processor, wherein the memory stores a computer program capable of running on the processor, characterized in that, When the processor runs the computer program, it performs the steps of the method according to any one of claims 1 to 5.

Images