Vehicle energy management method, device, apparatus and storage medium

Abstract

The application discloses a kind of vehicle energy management method, device, equipment and storage medium, belong to hydrogen fuel automobile technical field.The application is by when hydrogen fuel cell charges high-voltage power battery, obtains the actual output power of hydrogen fuel cell and the energy recovery power of whole vehicle;Actual recharging power is determined according to the actual output power of hydrogen fuel cell and the energy recovery power of whole vehicle;When actual recharging power is greater than or equal to the first recharging power threshold of high-voltage power battery and less than or equal to the second recharging power threshold of high-voltage power battery, record first continuous charging duration;Actual recharging power, first recharging power threshold and first continuous charging duration are adjusted to the actual output power of hydrogen fuel cell, and the above-mentioned mode ensures that vehicle system power is within the range of power battery package allowed to recover, so that battery package does not appear polarization phenomenon, protects power battery package, avoids the problem that excess power cannot be discharged.

Description

Technical Field

[0001] This invention relates to the field of hydrogen fuel cell vehicle technology, and in particular to a vehicle energy management method, device, equipment, and storage medium. Background Technology

[0002] Currently, hydrogen fuel cell vehicles are powered by hydrogen fuel cells and high-voltage batteries. The hydrogen fuel cell system has a current output power. Assuming the vehicle is coasting or undergoing regenerative braking, the sum of the power of the hydrogen fuel cell system and the regenerated power may exceed the recharge power allowed by the high-voltage battery pack. Furthermore, the minimum output power of the hydrogen fuel cell system at idle is not 0 kW. Even at its minimum output power, the hydrogen fuel cell system may still exceed the rechargeable power of the battery pack. This overcharging can cause battery pack polarization, leading to battery pack failure or reduced lifespan. In addition, the shutdown and startup times of the hydrogen fuel cell system are relatively long, and how to manage and release the excess power of the vehicle is also an urgent problem to be solved.

[0003] The above content is only used to help understand the technical solution of the present invention and does not represent an admission that the above content is prior art. Summary of the Invention

[0004] The main objective of this invention is to provide a vehicle energy management method, apparatus, device, and storage medium, which aims to solve the technical problems that existing technologies can lead to battery pack failure or reduced lifespan, and the inability to channel excess power.

[0005] To achieve the above objectives, the present invention provides a vehicle energy management method, wherein the vehicle includes a hydrogen fuel cell and a high-voltage power battery, the hydrogen fuel cell allowing charging of the high-voltage power battery, and the vehicle energy management method includes the following steps:

[0006] When the hydrogen fuel cell charges the high-voltage power battery, the actual output power of the hydrogen fuel cell and the energy recovery power of the whole vehicle are obtained;

[0007] The actual recharge power is determined based on the actual output power of the hydrogen fuel cell and the energy recovery power of the vehicle.

[0008] When the actual recharge power is greater than or equal to the first recharge power threshold of the high-voltage power battery and less than or equal to the second recharge power threshold of the high-voltage power battery, the first continuous charging duration is recorded.

[0009] The actual output power of the hydrogen fuel cell is adjusted based on the actual recharge power, the first recharge power threshold, and the first continuous charging duration.

[0010] Optionally, adjusting the actual output power of the hydrogen fuel cell based on the actual recharge power, the first recharge power threshold, and the first continuous charging duration includes:

[0011] Obtain the power difference between the actual recharge power and the first recharge power threshold;

[0012] Calculate the integral value based on the power difference and the first continuous charging duration;

[0013] When the integral value reaches a preset threshold, the actual output power of the hydrogen fuel cell is reduced to below the first recharge power threshold.

[0014] Optionally, the vehicle energy management method further includes:

[0015] When the integral value does not reach the preset threshold, it is detected whether the actual recharge power drops below the first recharge power threshold.

[0016] If not, continue with the step of calculating the integral value based on the power difference and the first continuous charging duration;

[0017] If so, record the second continuous charging duration corresponding to the actual recharge power being less than the first recharge power threshold;

[0018] The integral value is calculated based on the second continuous charging duration.

[0019] Optionally, the step of calculating the integral value based on the second continuous charging duration includes:

[0020] If the second continuous charging duration is greater than or equal to the preset duration, the integral value calculated based on the first continuous charging duration will be cleared to zero. When the actual recharge power is greater than or equal to the first recharge power threshold of the high-voltage power battery and less than or equal to the second recharge power threshold of the high-voltage power battery, a new first continuous charging duration will be recorded, and the integral value will be recalculated based on the new first continuous charging duration.

[0021] If the second continuous charging duration is less than the preset duration, the integral value calculated based on the first continuous charging duration is retained. When the actual recharge power is greater than or equal to the first recharge power threshold of the high-voltage power battery and less than or equal to the second recharge power threshold of the high-voltage power battery in the next instance, a new first continuous charging duration is recorded, a new integral value is calculated based on the new first continuous charging duration, and the retained integral value is added to the new integral value.

[0022] Optionally, after reducing the actual output power of the hydrogen fuel cell to below the first recharge power threshold when the integral value reaches a preset threshold, the method further includes:

[0023] Check if the integral value has been cleared to zero;

[0024] If not, the energy recovery function will be turned off during the period when the integral value is not cleared.

[0025] Optionally, after reducing the actual output power of the hydrogen fuel cell to below the first recharge power threshold when the integral value reaches a preset threshold, the method further includes:

[0026] Record the second duration for which the actual output power of the hydrogen fuel cell is less than the first recharge power threshold, and detect the current operating temperature of the high-voltage power battery;

[0027] The first discharge power corresponding to the high-voltage power battery is determined based on the current operating temperature and the first preset remaining power range.

[0028] The second discharge power corresponding to the high-voltage power battery is determined based on the current operating temperature and the second preset remaining power range, wherein the lower limit of the second preset remaining power range is greater than the upper limit of the first preset remaining power range.

[0029] If the sum of the first discharge power and the actual output power of the hydrogen fuel cell is greater than or equal to the second discharge power, then the actual output power of the hydrogen fuel cell will not be increased if the second duration has not reached the preset duration.

[0030] If the sum of the first discharge power and the actual output power of the hydrogen fuel cell is less than the second discharge power, then it is detected whether an acceleration request has been received. If an acceleration request is received, the actual output power of the hydrogen fuel cell is increased. After the acceleration request stops, the process returns to the step of recording the second duration corresponding to the actual output power of the hydrogen fuel cell being less than the first recharge power threshold.

[0031] Optionally, after adjusting the actual output power of the hydrogen fuel cell based on the actual recharge power, the first recharge power threshold, and the first continuous charging duration, the method further includes:

[0032] When a fault is detected in the high-voltage power battery, the maximum rechargeable power of the high-voltage power battery in the fault mode is determined, and the maximum rechargeable power is less than the first rechargeable power threshold.

[0033] The target output power is determined based on the maximum rechargeable power and the actual output power of the hydrogen fuel cell, wherein the target output power is the minimum value between the maximum rechargeable power and the actual output power of the hydrogen fuel cell;

[0034] Adjust the actual output power of the hydrogen fuel cell to the target output power and turn off the energy recovery function.

[0035] Furthermore, to achieve the above objectives, the present invention also proposes a vehicle energy management device, wherein the vehicle includes a hydrogen fuel cell and a high-voltage power battery, the hydrogen fuel cell allowing charging of the high-voltage power battery, and the vehicle energy management device includes:

[0036] The acquisition module is used to acquire the actual output power of the hydrogen fuel cell and the energy recovery power of the whole vehicle when the hydrogen fuel cell charges the high-voltage power battery;

[0037] The calculation module is used to determine the actual recharge power based on the actual output power of the hydrogen fuel cell and the energy recovery power of the vehicle.

[0038] The judgment module is used to record the first continuous charging duration when the actual recharge power is greater than or equal to the first recharge power threshold of the high-voltage power battery and less than or equal to the second recharge power threshold of the high-voltage power battery.

[0039] The control module is used to adjust the actual output power of the hydrogen fuel cell based on the actual recharge power, the first recharge power threshold, and the first continuous charging duration.

[0040] Furthermore, to achieve the above objectives, the present invention also proposes a vehicle energy management device, the vehicle energy management device comprising: a memory, a processor, and a vehicle energy management program stored in the memory and running on the processor, the vehicle energy management program being configured to implement the vehicle energy management method as described above.

[0041] In addition, to achieve the above objectives, the present invention also proposes a storage medium storing a vehicle energy management program, which, when executed by a processor, implements the vehicle energy management method as described above.

[0042] This invention obtains the actual output power of the hydrogen fuel cell and the energy recovery power of the vehicle when the hydrogen fuel cell charges the high-voltage power battery; determines the actual recharge power based on the actual output power of the hydrogen fuel cell and the energy recovery power of the vehicle; records a first continuous charging duration when the actual recharge power is greater than or equal to a first recharge power threshold and less than or equal to a second recharge power threshold of the high-voltage power battery; and adjusts the actual output power of the hydrogen fuel cell based on the actual recharge power, the first recharge power threshold, and the first continuous charging duration. This method ensures that the vehicle system power remains within the allowable recharge range of the power battery pack, preventing polarization of the battery pack, protecting the power battery pack, and avoiding the problem of excess power that cannot be discharged. Attached Figure Description

[0043] Figure 1 This is a schematic diagram of the structure of the vehicle energy management device in the hardware operating environment involved in the embodiments of the present invention;

[0044] Figure 2 This is a flowchart illustrating the first embodiment of the vehicle energy management method of the present invention;

[0045] Figure 3 This is a schematic diagram of the power system structure of a hydrogen fuel cell vehicle in one embodiment of the vehicle energy management method of the present invention;

[0046] Figure 4 This is a flowchart illustrating the second embodiment of the vehicle energy management method of the present invention;

[0047] Figure 5 This is a schematic diagram of the recharge logic curve in one embodiment of the vehicle energy management method of the present invention;

[0048] Figure 6 This is a flowchart illustrating the third embodiment of the vehicle energy management method of the present invention;

[0049] Figure 7 This is a structural block diagram of the first embodiment of the vehicle energy management device of the present invention.

[0050] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0051] It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention.

[0052] Reference Figure 1 , Figure 1 This is a schematic diagram of the vehicle energy management device structure in the hardware operating environment involved in the embodiments of the present invention.

[0053] like Figure 1As shown, the vehicle energy management device may include: a processor 1001, such as a central processing unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. The communication bus 1002 is used to enable communication between these components. The user interface 1003 may include a display screen or an input unit such as a keyboard; optionally, the user interface 1003 may also include a standard wired interface or a wireless interface. The network interface 1004 may optionally include a standard wired interface or a wireless interface (such as a Wireless-Fidelity (Wi-Fi) interface). The memory 1005 may be a high-speed random access memory (RAM) or a stable non-volatile memory (NVM), such as a disk drive. The memory 1005 may also optionally be a storage device independent of the aforementioned processor 1001.

[0054] Those skilled in the art will understand that Figure 1 The structure shown does not constitute a limitation on the vehicle energy management device and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0055] like Figure 1 As shown, the memory 1005, which serves as a storage medium, may include an operating system, a network communication module, a user interface module, and a vehicle energy management program.

[0056] exist Figure 1 In the vehicle energy management device shown, the network interface 1004 is mainly used for data communication with the network server; the user interface 1003 is mainly used for data interaction with the user; the processor 1001 and the memory 1005 in the vehicle energy management device of the present invention can be set in the vehicle energy management device, and the vehicle energy management device calls the vehicle energy management program stored in the memory 1005 through the processor 1001 and executes the vehicle energy management method provided in the embodiment of the present invention.

[0057] This invention provides a vehicle energy management method, referring to... Figure 2 , Figure 2 This is a flowchart illustrating the first embodiment of a vehicle energy management method according to the present invention.

[0058] In this embodiment, the vehicle energy management method includes the following steps:

[0059] Step S10: When the hydrogen fuel cell is charging the high-voltage power battery, obtain the actual output power of the hydrogen fuel cell and the energy recovery power of the whole vehicle.

[0060] In this embodiment, the executing entity can be the vehicle energy management device, which has functions such as data processing, data communication, and program execution. The vehicle energy management device can be a vehicle controller (VCM). Of course, other devices with similar functions can also be used, and this embodiment does not limit this. For ease of explanation, this embodiment uses a vehicle energy management device as an example.

[0061] This embodiment focuses on a hydrogen fuel cell vehicle; the specific system structure can be found in [reference needed]. Figure 3 .like Figure 3 As shown, in this embodiment, the vehicle's power source includes a hydrogen fuel cell system and a high-voltage power battery system. Both systems can provide power to the vehicle. The hydrogen fuel cell system includes a hydrogen fuel cell and a hydrogen fuel cell controller (FCU). The high-voltage power battery system includes a power battery and a power battery controller (BMS). The BMS has a fault mode recharge threshold requirement, which corresponds to the maximum allowable rechargeable power threshold of the high-voltage power battery in a fault mode. The hydrogen fuel cell can charge the high-voltage power battery under specific operating conditions. This embodiment further explains different hydrogen fuel cell vehicle driving modes. Mode 1 is pure EV driving, in which the high-voltage power battery supplies power to the motor, which drives the wheels. Mode 2 is vehicle driving powered by the hydrogen fuel cell, in which the hydrogen fuel cell supplies power to the motor, which drives the wheels. Mode 3 is vehicle driving powered by the hydrogen fuel cell while simultaneously charging the high-voltage battery pack. Mode 4 is vehicle driving powered by both the hydrogen fuel cell and the high-voltage power battery, in which both supply power to the motor. Mode 5 is coasting recovery, in which the hydrogen fuel cell, along with the wheels or motor, charges the high-voltage power battery pack. Mode 6 is regenerative braking, in which the hydrogen fuel cell, along with the wheels or motor, charges the high-voltage battery pack. It's important to emphasize that in modes 3, 5, and 6, the hydrogen fuel cell charges the high-voltage battery; this embodiment focuses on controlling the output power of the hydrogen fuel cell in these modes.

[0062] It should be noted that the current power sources for hydrogen fuel cell vehicles include hydrogen fuel cells and high-voltage batteries. The hydrogen fuel cell system has a current output power. Assuming the vehicle is coasting or undergoing regenerative braking, the sum of the power of the hydrogen fuel cell system and the regenerated power may exceed the battery pack's allowable recharge power. Furthermore, the minimum output power of the hydrogen fuel cell system at idle is not 0 kW. Even at its minimum output power, the hydrogen fuel cell system may still exceed the battery pack's rechargeable power. This overcharging can cause battery pack polarization, leading to battery pack failure or reduced lifespan. At the same time, the hydrogen fuel cell system has a long shutdown and startup time, making frequent start-stop operations inconvenient and preventing the vehicle's excess power from being properly released. In this embodiment, to solve the aforementioned technical problems, the actual output power of the hydrogen fuel cell and the energy recovery power of the vehicle are obtained when the hydrogen fuel cell charges the high-voltage power battery. The actual recharge power is determined based on the actual output power of the hydrogen fuel cell and the energy recovery power of the vehicle. When the actual recharge power is greater than or equal to the first recharge power threshold of the high-voltage power battery and less than or equal to the second recharge power threshold of the high-voltage power battery, a first continuous charging duration is recorded. The actual output power of the hydrogen fuel cell is adjusted based on the actual recharge power, the first recharge power threshold, and the first continuous charging duration. This ensures that the vehicle system power is within the allowable recovery range of the power battery pack, preventing polarization of the battery pack, protecting the power battery pack, and avoiding the problem of excess power that cannot be discharged. Specifically, this can be achieved as follows.

[0063] In the specific implementation, it is necessary to first determine whether the hydrogen fuel cell is supplying power to the high-voltage power battery. If it is detected that the hydrogen fuel cell is supplying power to the high-voltage power battery, the actual output power of the hydrogen fuel cell is obtained. In addition to the actual output power of the hydrogen fuel cell, the actual recharge power of the vehicle also includes the corresponding energy recovery power generated due to the activation of the energy recovery function. In this embodiment, this part of the power also needs to be obtained. Energy recovery includes regenerative braking and regenerative braking.

[0064] Step S20: Determine the actual recharge power based on the actual output power of the hydrogen fuel cell and the energy recovery power of the vehicle.

[0065] In a specific implementation, after obtaining the actual output power of the hydrogen fuel cell and the energy recovery power of the vehicle, the actual recharge power can be determined based on the actual output power of the hydrogen fuel cell and the energy recovery power of the vehicle. Specifically, the actual recharge power can be calculated by summation.

[0066] Step S30: When the actual recharge power is greater than or equal to the first recharge power threshold of the high-voltage power battery and less than or equal to the second recharge power threshold of the high-voltage power battery, record the first continuous charging duration.

[0067] In specific implementation, after calculating the actual recharge power, this embodiment further compares the actual recharge power with a first recharge power threshold and a second recharge power threshold. The first recharge power threshold is less than the second recharge power threshold. The first recharge power threshold represents the maximum recharge power for which the high-voltage power battery can be charged for a long time, while the second recharge power threshold represents the maximum recharge power for which the high-voltage power battery can be charged for a short time. Based on the characteristics of the battery pack itself, the first recharge power threshold can be set to the maximum recharge power for 10s or 30s of high-power charging. That is, after charging the high-voltage power battery for 10s or 30s with the first recharge power threshold, to prevent battery pack polarization caused by overcharging, the recharge power needs to be reduced to below the second recharge power threshold for a longer charging period. The specific threshold is related to the battery pack's operating temperature and the vehicle's remaining charge level, and can be obtained by looking up a table; this embodiment does not impose any restrictions on this. During the charging process, the first continuous charging duration also needs to be recorded in real time. The first continuous charging duration represents the charging duration for short-term high-power charging of the high-voltage power battery.

[0068] Step S40: Adjust the actual output power of the hydrogen fuel cell according to the actual recharge power, the first recharge power threshold, and the first continuous charging duration.

[0069] It should be understood that during the actual charging process of a high-voltage power battery, the actual recharge power will not always remain at the second recharge power threshold. If the actual recharge power is less than the second recharge power threshold, the charging time for short-term high-power charging of the high-voltage power battery is allowed to be extended. For example, when the actual recharge power Pt is maintained at the second recharge power threshold P2, the high-voltage battery can be charged continuously for 10 seconds, while when the actual recharge power is less than the second recharge power threshold, let's say Pt1, it can be charged continuously for 10+t seconds.

[0070] In practice, the actual integral value can be calculated based on the actual recharge power, the first recharge power threshold, and the first continuous charging duration, thereby determining whether the high-voltage power battery has met the requirement for short-term high power. If so, the actual output power of the hydrogen fuel cell is reduced.

[0071] This embodiment obtains the actual output power of the hydrogen fuel cell and the energy recovery power of the vehicle when the hydrogen fuel cell charges the high-voltage power battery; determines the actual recharge power based on the actual output power of the hydrogen fuel cell and the energy recovery power of the vehicle; records the first continuous charging duration when the actual recharge power is greater than or equal to the first recharge power threshold of the high-voltage power battery and less than or equal to the second recharge power threshold of the high-voltage power battery; and adjusts the actual output power of the hydrogen fuel cell based on the actual recharge power, the first recharge power threshold, and the first continuous charging duration. This method ensures that the vehicle system power is within the allowable recharge range of the power battery pack, preventing polarization of the battery pack, protecting the power battery pack, and avoiding the problem of excess power that cannot be discharged.

[0072] refer to Figure 4 , Figure 4 This is a flowchart illustrating a second embodiment of a vehicle energy management method according to the present invention.

[0073] Based on the first embodiment described above, in the vehicle energy management method of this embodiment, step S40 specifically includes:

[0074] Step S401: Obtain the power difference between the actual recharge power and the first recharge power threshold.

[0075] In practice, when calculating the integral, it is necessary to first calculate the power difference between the actual recharge power and the first recharge power threshold.

[0076] Step S402: Calculate the integral value based on the power difference and the first continuous charging duration.

[0077] In practical implementation, an integral value can be calculated based on the power difference obtained from the above calculation and the first continuous charging duration. This integral value corresponds to... Figure 5 The area of ​​the peaks in the recharge logic curve. Figure 5 In the diagram, P2 represents the second recharge power threshold, P1 represents the first recharge power threshold, and L represents the curve corresponding to the actual recharge power. Figure 5 The peak of curve L shown in the figure is between the first recharge power threshold and the second recharge power threshold, and the trough is when the actual recharge power is less than the first recharge power threshold.

[0078] Step S403: When the integral value reaches a preset threshold, the actual output power of the hydrogen fuel cell is reduced to below the first recharge power threshold.

[0079] It should be noted that, Figure 5The preset threshold S shown can be obtained by integrating the power difference between the second recharge power threshold and the first recharge power threshold and the corresponding charging time. The integral value can be calculated by the power difference and the first continuous charging time. If the integral value reaches the preset threshold, it means that the high-voltage power battery is not suitable for high-power charging. In this case, it is necessary to reduce the actual output power of the hydrogen fuel cell. Specifically, in this embodiment, the real-time output power of the hydrogen fuel cell can be reduced to below the first recharge power threshold.

[0080] It should be understood that in practice, there may be situations where the integral value does not reach the preset threshold, but the actual recharge power has already decreased to below the first recharge power threshold. In this case, this embodiment requires real-time detection of the actual recharge power. If the actual recharge power has not decreased to below the first recharge power threshold before the integral value reaches the preset threshold, the judgment and power adjustment are performed as described above. If the actual recharge power has decreased to below the first recharge power threshold before the integral value reaches the preset threshold, the second continuous charging duration corresponding to the actual recharge power being less than the first recharge power threshold is recorded, and then the calculation of the integral value is adjusted accordingly based on the second continuous charging duration.

[0081] In an optional embodiment, if the second continuous charging duration is greater than or equal to the preset duration, it means that the actual recharge power is always less than the first recharge power threshold within the preset duration. In this case, the integral value of the actual recharge power calculated between the first recharge power threshold and the second recharge power threshold will be cleared to zero. Then, after the actual recharge power rises above the first recharge power threshold, the first continuous charging duration will be recorded again and the integral value will be recalculated.

[0082] In another optional embodiment, if the second continuous charging duration is less than the preset duration, it indicates that the actual recharge power has risen above the first recharge power threshold again within a short period of time. In this case, this embodiment retains the integral value calculated between the first and second recharge power thresholds for the actual recharge power. After the actual recharge power rises above the first recharge power threshold, a new integral value is calculated based on the new first continuous charging duration. Then, the retained integral value and the new integral value are added together to obtain the final integral value. The preset duration can be set to 10s to 15s, and can be adjusted based on actual conditions. This embodiment does not impose any restrictions on this.

[0083] Furthermore, after reducing the actual output power of the hydrogen fuel cell to below the first recharge power threshold, since the power reduction requires a process, during the power reduction process, it will detect in real time whether the calculated integral value is cleared to zero. If it is not cleared to zero, the energy recovery function during the period when the integral value is not cleared to zero will be turned off, that is, the energy recovery power will not be received.

[0084] The above control measures apply to the normal operation of the high-voltage power battery. When the high-voltage power battery malfunctions, in this embodiment, the charging power is limited to a safe level, which is significantly lower than the first recharge power threshold. At this point, the BMS sends a message indicating that the maximum rechargeable power (Pbmax) is limited to this safe level, meaning the maximum rechargeable power of the high-voltage power battery in fault mode. Simultaneously, this embodiment also considers the actual output power of the hydrogen fuel cell, taking the minimum of the maximum rechargeable power and the actual output power of the hydrogen fuel cell. The actual output power of the hydrogen fuel cell is then adjusted to the target output power, and the vehicle's energy recovery function is disabled, requesting the VDC system to absorb the recovered power.

[0085] This embodiment obtains the power difference between the actual recharge power and the first recharge power threshold; calculates an integral value based on the power difference and the first continuous charging duration; when the integral value reaches a preset threshold, the actual output power of the hydrogen fuel cell is reduced to below the first recharge power threshold. In this way, the vehicle system power can be ensured to be within the allowable recharge range of the power battery pack, so that the battery pack does not experience polarization, protecting the power battery pack and avoiding the problem of excess power that cannot be discharged.

[0086] refer to Figure 6 , Figure 6 This is a flowchart illustrating a third embodiment of a vehicle energy management method according to the present invention.

[0087] Based on the first embodiment described above, the third embodiment of the vehicle energy management method of the present invention further includes, after step S40:

[0088] Step S50: Record the second duration corresponding to the actual output power of the hydrogen fuel cell being less than the first recharge power threshold, and detect the current operating temperature of the high-voltage power battery.

[0089] In a specific implementation, after reducing the actual output power of the hydrogen fuel cell in this embodiment, it is necessary to increase the actual output power of the hydrogen fuel cell again. However, the increase in power needs to meet certain conditions. Specifically, in this embodiment, it is necessary to first record the second duration corresponding to the actual output power of the hydrogen fuel cell being less than the first recharge power threshold, as well as the current operating temperature of the high-voltage power battery.

[0090] Step S60: Determine the first discharge power corresponding to the high-voltage power battery based on the current operating temperature and the first preset remaining power range.

[0091] Step S70: Determine the second discharge power corresponding to the high-voltage power battery based on the current operating temperature and the second preset remaining power range, wherein the lower limit of the second preset remaining power range is greater than the upper limit of the first preset remaining power range.

[0092] In practical implementation, the high-voltage power battery has different discharge powers based on the current operating temperature and the different remaining charge levels of the vehicle. In this embodiment, the first discharge power corresponding to the high-voltage power battery can be determined based on the current operating temperature and the first preset remaining charge range, and the second discharge power corresponding to the high-voltage power battery can be determined based on the current operating temperature and the second preset remaining charge range. The first preset remaining charge range can be set to SOC 30% to 70%, and the second preset remaining charge range can be set to SOC 80%.

[0093] Step S80: If the sum of the first discharge power and the actual output power of the hydrogen fuel cell is greater than or equal to the second discharge power, then the actual output power of the hydrogen fuel cell will not be increased if the second duration has not reached the preset duration.

[0094] In practice, if the sum of the first discharge power and the actual output power of the hydrogen fuel cell is greater than or equal to the second discharge power, the actual output power of the hydrogen fuel cell will be increased after the second duration reaches the preset duration. Before the second duration reaches the preset duration, the actual output power of the hydrogen fuel cell will not be increased even if a related acceleration request is received.

[0095] Step S90: If the sum of the first discharge power and the actual output power of the hydrogen fuel cell is less than the second discharge power, then detect whether an acceleration request has been received. If an acceleration request is received, increase the actual output power of the hydrogen fuel cell. After the acceleration request stops, return to the step of recording the second duration corresponding to the actual output power of the hydrogen fuel cell being less than the first recharge power threshold.

[0096] In practice, if the sum of the first discharge power and the actual output power of the hydrogen fuel cell is less than the second discharge power, an acceleration request is detected. If an acceleration request is received, the actual output power of the hydrogen fuel cell can be increased based on the acceleration request, even if the second duration has not reached the preset duration. In this case, it is determined that the power requirement for pure EV driving is not met, therefore, the actual output power of the hydrogen fuel cell needs to be increased in response to the acceleration request.

[0097] This embodiment records the second duration for which the actual output power of the hydrogen fuel cell is less than the first recharge power threshold, and detects the current operating temperature of the high-voltage power battery. Based on the current operating temperature and a first preset remaining power range, a first discharge power corresponding to the high-voltage power battery is determined. Based on the current operating temperature and a second preset remaining power range, a second discharge power corresponding to the high-voltage power battery is determined, where the lower limit of the second preset remaining power range is greater than the upper limit of the first preset remaining power range. If the sum of the first discharge power and the actual output power of the hydrogen fuel cell is greater than or equal to the second discharge power, the actual output power of the hydrogen fuel cell is not increased if the second duration has not reached the preset duration. If the sum of the first discharge power and the actual output power of the hydrogen fuel cell is less than the second discharge power, an acceleration request is detected. If an acceleration request is received, the actual output power of the hydrogen fuel cell is increased. After the acceleration request stops, the process returns to the step of recording the second duration for which the actual output power of the hydrogen fuel cell is less than the first recharge power threshold. This method optimizes vehicle energy management.

[0098] Furthermore, embodiments of the present invention also propose a storage medium storing a vehicle energy management program, which, when executed by a processor, implements the steps of the vehicle energy management method described above.

[0099] Since this storage medium adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be repeated here.

[0100] Reference Figure 7 , Figure 7 This is a structural block diagram of the first embodiment of the vehicle energy management device of the present invention.

[0101] like Figure 7 As shown, the vehicle energy management device proposed in this embodiment of the invention includes:

[0102] The acquisition module 10 is used to acquire the actual output power of the hydrogen fuel cell and the energy recovery power of the whole vehicle when the hydrogen fuel cell charges the high-voltage power battery.

[0103] The calculation module 20 is used to determine the actual recharge power based on the actual output power of the hydrogen fuel cell and the energy recovery power of the vehicle.

[0104] The judgment module 30 is used to record the first continuous charging duration when the actual recharge power is greater than or equal to the first recharge power threshold of the high-voltage power battery and less than or equal to the second recharge power threshold of the high-voltage power battery.

[0105] The control module 40 is used to adjust the actual output power of the hydrogen fuel cell based on the actual recharge power, the first recharge power threshold, and the first continuous charging duration.

[0106] This embodiment obtains the actual output power of the hydrogen fuel cell and the energy recovery power of the vehicle when the hydrogen fuel cell charges the high-voltage power battery; determines the actual recharge power based on the actual output power of the hydrogen fuel cell and the energy recovery power of the vehicle; records the first continuous charging duration when the actual recharge power is greater than or equal to the first recharge power threshold of the high-voltage power battery and less than or equal to the second recharge power threshold of the high-voltage power battery; and adjusts the actual output power of the hydrogen fuel cell based on the actual recharge power, the first recharge power threshold, and the first continuous charging duration. This method ensures that the vehicle system power is within the allowable recharge range of the power battery pack, preventing polarization of the battery pack, protecting the power battery pack, and avoiding the problem of excess power that cannot be discharged.

[0107] In one embodiment, the control module 40 is further configured to acquire the power difference between the actual recharge power and the first recharge power threshold; calculate an integral value based on the power difference and the first continuous charging duration; and reduce the actual output power of the hydrogen fuel cell to below the first recharge power threshold when the integral value reaches a preset threshold.

[0108] In one embodiment, the control module 40 is further configured to detect whether the actual recharge power drops below the first recharge power threshold when the integral value does not reach the preset threshold; if not, continue to execute the step of calculating the integral value based on the power difference and the first continuous charging duration; if yes, record the second continuous charging duration corresponding to the actual recharge power being less than the first recharge power threshold; and calculate the integral value based on the second continuous charging duration.

[0109] In one embodiment, the control module 40 is further configured to: if the second continuous charging duration is greater than or equal to a preset duration, clear the integral value calculated based on the first continuous charging duration to zero, and when the actual recharge power is greater than or equal to the first recharge power threshold of the high-voltage power battery and less than or equal to the second recharge power threshold of the high-voltage power battery in the next instance, record a new first continuous charging duration and recalculate the integral value based on the new first continuous charging duration; if the second continuous charging duration is less than the preset duration, retain the integral value calculated based on the first continuous charging duration, and when the actual recharge power is greater than or equal to the first recharge power threshold of the high-voltage power battery and less than or equal to the second recharge power threshold of the high-voltage power battery in the next instance, record a new first continuous charging duration, calculate a new integral value based on the new first continuous charging duration, and accumulate the retained integral value with the new integral value.

[0110] In one embodiment, the control module 40 is further configured to detect whether the integral value is cleared to zero; if not, the energy recovery function during the period when the integral value is not cleared to zero is turned off.

[0111] In one embodiment, the control module 40 is further configured to record a second duration corresponding to the actual output power of the hydrogen fuel cell being less than the first recharge power threshold, and detect the current operating temperature of the high-voltage power battery; determine a first discharge power corresponding to the high-voltage power battery based on the current operating temperature and a first preset remaining power range; determine a second discharge power corresponding to the high-voltage power battery based on the current operating temperature and a second preset remaining power range, wherein the lower limit of the second preset remaining power range is greater than the upper limit of the first preset remaining power range; if the sum of the first discharge power and the actual output power of the hydrogen fuel cell is greater than or equal to the second discharge power, then the actual output power of the hydrogen fuel cell is not increased if the second duration has not reached the preset duration; if the sum of the first discharge power and the actual output power of the hydrogen fuel cell is less than the second discharge power, then it is detected whether an acceleration request has been received, and if an acceleration request is received, the actual output power of the hydrogen fuel cell is increased, and after the acceleration request stops, the step of recording the second duration corresponding to the actual output power of the hydrogen fuel cell being less than the first recharge power threshold is returned to execution.

[0112] In one embodiment, the control module 40 is further configured to, when a fault is detected in the high-voltage power battery, determine the maximum rechargeable power of the high-voltage power battery in fault mode, wherein the maximum rechargeable power is less than the first rechargeable power threshold; determine a target output power based on the maximum rechargeable power and the actual output power of the hydrogen fuel cell, wherein the target output power is the minimum of the maximum rechargeable power and the actual output power of the hydrogen fuel cell; adjust the actual output power of the hydrogen fuel cell to the target output power; and disable the energy recovery function.

[0113] It should be understood that the above are merely illustrative examples and do not constitute any limitation on the technical solutions of the present invention. In specific applications, those skilled in the art can make settings as needed, and the present invention does not impose any restrictions on this.

[0114] It should be noted that the workflow described above is merely illustrative and does not limit the scope of protection of this invention. In practical applications, those skilled in the art can select some or all of the workflow to achieve the purpose of this embodiment according to actual needs, and no restrictions are imposed here.

[0115] In addition, for technical details not described in detail in this embodiment, please refer to the vehicle energy management method provided in any embodiment of the present invention, which will not be repeated here.

[0116] Furthermore, it should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.

[0117] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0118] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as read-only memory (ROM) / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0119] The above are merely preferred embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A vehicle energy management method, characterized in that, The vehicle includes a hydrogen fuel cell and a high-voltage power battery, wherein the hydrogen fuel cell allows charging of the high-voltage power battery, and the vehicle energy management method includes: When the hydrogen fuel cell charges the high-voltage power battery, the actual output power of the hydrogen fuel cell and the energy recovery power of the whole vehicle are obtained. The actual recharge power is determined based on the actual output power of the hydrogen fuel cell and the energy recovery power of the vehicle. When the actual recharge power is greater than or equal to the first recharge power threshold of the high-voltage power battery and less than or equal to the second recharge power threshold of the high-voltage power battery, the first continuous charging duration is recorded. Adjusting the actual output power of the hydrogen fuel cell based on the actual recharge power, the first recharge power threshold, and the first continuous charging duration includes: obtaining the power difference between the actual recharge power and the first recharge power threshold; calculating an integral value based on the power difference and the first continuous charging duration; and reducing the actual output power of the hydrogen fuel cell to below the first recharge power threshold when the integral value reaches a preset threshold.

2. The vehicle energy management method of claim 1, wherein, The vehicle energy management method also includes: When the integral value does not reach the preset threshold, it is detected whether the actual recharge power drops below the first recharge power threshold. If not, continue with the step of calculating the integral value based on the power difference and the first continuous charging duration; If so, record the second continuous charging duration corresponding to the actual recharge power being less than the first recharge power threshold; The integral value is calculated based on the second continuous charging duration.

3. The vehicle energy management method of claim 2, wherein, The calculation of the integral value based on the second continuous charging duration includes: If the second continuous charging duration is greater than or equal to the preset duration, the integral value calculated based on the first continuous charging duration will be cleared to zero. When the actual recharge power is greater than or equal to the first recharge power threshold of the high-voltage power battery and less than or equal to the second recharge power threshold of the high-voltage power battery, a new first continuous charging duration will be recorded, and the integral value will be recalculated based on the new first continuous charging duration. If the second continuous charging duration is less than the preset duration, the integral value calculated based on the first continuous charging duration is retained. When the actual recharge power is greater than or equal to the first recharge power threshold of the high-voltage power battery and less than or equal to the second recharge power threshold of the high-voltage power battery in the next instance, a new first continuous charging duration is recorded, a new integral value is calculated based on the new first continuous charging duration, and the retained integral value is added to the new integral value.

4. The vehicle energy management method of claim 1, wherein, After reducing the actual output power of the hydrogen fuel cell to below the first recharge power threshold when the integral value reaches a preset threshold, the method further includes: Check if the integral value has been cleared to zero; If not, the energy recovery function will be turned off during the period when the integral value is not cleared.

5. The vehicle energy management method of claim 1, wherein, After reducing the actual output power of the hydrogen fuel cell to below the first recharge power threshold when the integral value reaches a preset threshold, the method further includes: Record the second duration for which the actual output power of the hydrogen fuel cell is less than the first recharge power threshold, and detect the current operating temperature of the high-voltage power battery; The first discharge power corresponding to the high-voltage power battery is determined based on the current operating temperature and the first preset remaining power range. The second discharge power corresponding to the high-voltage power battery is determined based on the current operating temperature and the second preset remaining power range, wherein the lower limit of the second preset remaining power range is greater than the upper limit of the first preset remaining power range. If the sum of the first discharge power and the actual output power of the hydrogen fuel cell is greater than or equal to the second discharge power, then the actual output power of the hydrogen fuel cell will not be increased if the second duration has not reached the preset duration. If the sum of the first discharge power and the actual output power of the hydrogen fuel cell is less than the second discharge power, then it is detected whether an acceleration request has been received. If an acceleration request is received, the actual output power of the hydrogen fuel cell is increased. After the acceleration request stops, the process returns to the step of recording the second duration corresponding to the actual output power of the hydrogen fuel cell being less than the first recharge power threshold.

6. The vehicle energy management method according to any one of claims 1 to 5, characterized by, After adjusting the actual output power of the hydrogen fuel cell based on the actual recharge power, the first recharge power threshold, and the first continuous charging duration, the method further includes: When a fault is detected in the high-voltage power battery, the maximum rechargeable power of the high-voltage power battery in the fault mode is determined, and the maximum rechargeable power is less than the first rechargeable power threshold. The target output power is determined based on the maximum rechargeable power and the actual output power of the hydrogen fuel cell, wherein the target output power is the minimum value between the maximum rechargeable power and the actual output power of the hydrogen fuel cell; Adjust the actual output power of the hydrogen fuel cell to the target output power and turn off the energy recovery function.

7. A vehicle energy management apparatus, characterized by, The vehicle includes a hydrogen fuel cell and a high-voltage power battery, wherein the hydrogen fuel cell allows charging of the high-voltage power battery, and the vehicle energy management device includes: The acquisition module is used to acquire the actual output power of the hydrogen fuel cell and the energy recovery power of the whole vehicle when the hydrogen fuel cell charges the high-voltage power battery; The calculation module is used to determine the actual recharge power based on the actual output power of the hydrogen fuel cell and the energy recovery power of the vehicle. The judgment module is used to record the first continuous charging duration when the actual recharge power is greater than or equal to the first recharge power threshold of the high-voltage power battery and less than or equal to the second recharge power threshold of the high-voltage power battery. The control module is used to adjust the actual output power of the hydrogen fuel cell according to the actual recharge power, the first recharge power threshold, and the first continuous charging duration, including: obtaining the power difference between the actual recharge power and the first recharge power threshold; calculating an integral value based on the power difference and the first continuous charging duration; and reducing the actual output power of the hydrogen fuel cell to below the first recharge power threshold when the integral value reaches a preset threshold.

8. A vehicle energy management device, characterized in that, The vehicle energy management device includes: a memory, a processor, and a vehicle energy management program stored in the memory and running on the processor, the vehicle energy management program being configured to implement the vehicle energy management method as described in any one of claims 1 to 6.

9. A storage medium, characterized by The storage medium stores a vehicle energy management program, which, when executed by a processor, implements the vehicle energy management method as described in any one of claims 1 to 6.

Images