KR-20260064029-A - METHOD AND DEVICE FOR CONTROLLING FUEL CELLS USING FORWARD DRIVING INFORMATION OF FUEL CELL VEHICLES

Abstract

The present disclosure relates to a method and apparatus for controlling a fuel cell using forward driving information of a fuel cell vehicle. More specifically, the method comprises the steps of acquiring forward driving information of a forward driving road, calculating a fuel cell required output value for a current driving section based on the forward driving information, and determining whether to limit fuel cell power generation based on the forward driving information and the fuel cell required output value for the current driving section. If the forward driving section is a long steel plate, fuel cell power generation is limited, and the vehicle can be driven in the current driving section by consuming only the battery output.

Inventors

• 장상필

Assignees

• 현대자동차주식회사
• 기아 주식회사

Dates

Publication Date

20260507

Application Date

20241031

Claims (20)

1. Step of acquiring forward driving information of the forward driving road; A step of calculating the required fuel cell output value of the current driving section based on the above forward driving information; and The method includes a step of determining whether to limit fuel cell power generation based on the above-mentioned forward driving information and the fuel cell required output value of the above-mentioned current driving section, If the forward driving section is a long steel plate, limit fuel cell power generation and drive the vehicle in the current driving section by consuming only battery output, Method for controlling fuel cell power generation of a vehicle.
2. In paragraph 1, The above forward driving information is obtained for each forward driving section classified to include at least a current driving section, a first forward driving section, and a second forward driving section. Method for controlling fuel cell power generation of a vehicle.
3. In paragraph 2, The step of calculating the required fuel cell output value for the current driving section is: Step to calculate the expected battery output value; A step of calculating the estimated energy requirement for battery charging and discharging by multiplying the above-mentioned battery estimated output value and the future driving estimated time; A step of calculating the required battery charge/discharge output value in the current driving section by dividing the estimated required energy amount of the battery charge/discharge by the estimated current driving time; and The method further includes the step of determining the current section fuel cell required output value by adding the battery charge/discharge required output value and the vehicle required output value in the current driving section. Method for controlling fuel cell power generation of a vehicle.
4. In paragraph 3, The method further includes a step of determining the required fuel cell output value for the current driving section by correcting the required vehicle output value for driving to the required battery charge/discharge output value. The fuel cell required output value of the current driving section is determined by adding the vehicle required output value to the battery charge/discharge required output value. Method for controlling fuel cell power generation of a vehicle.
5. In paragraph 1, The step of determining whether to limit the above fuel cell power generation is, A step further comprising comparing a battery discharge output limit value and an EV driving-capable battery discharge output determination value to determine whether the vehicle can be driven by consuming only the battery output, Method for controlling fuel cell power generation of a vehicle.
6. In paragraph 5, If it is determined that the vehicle can be driven solely by battery output in the above current driving section, A step further comprising comparing the required fuel cell output value of the current driving section with the determination value of the need for fuel cell power generation during vehicle operation, Method for controlling fuel cell power generation of a vehicle.
7. In paragraph 6, If the required fuel cell output value of the current driving section is smaller, limiting fuel cell power generation even when performing battery discharge in the current driving section, Method for controlling fuel cell power generation of a vehicle.
8. In paragraph 5 or 6, When the vehicle's battery discharge exceeds a certain standard during the current driving section, fuel cell power generation is not restricted, Method for controlling fuel cell power generation of a vehicle.
9. In Paragraph 7, In the case of limiting the above fuel cell power generation, Even if the first forward driving section and the second forward driving section are long steel plates, discharging the battery SOC by consuming only battery output when driving the vehicle in the current driving section, Method for controlling fuel cell power generation of a vehicle.
10. In paragraph 8, In cases where the above fuel cell power generation is not restricted, Controlling fuel cell power generation during vehicle operation in the above current driving section to charge or discharge the battery SOC according to the first forward driving section and the second forward driving section, Method for controlling fuel cell power generation of a vehicle.
11. In a fuel cell power generation control device of a vehicle that controls a battery output value by utilizing forward driving information, Peripheral device that acquires at least one of the vehicle speed limit, gradient status, and gradient data of a road ahead as forward driving information, Memory for storing at least one instruction; and A processor that executes at least one instruction stored in the memory, wherein The above processor is, Calculate the required fuel cell output value for the current driving section based on the above forward driving information; and Based on the above forward driving information and the fuel cell required output value of the above current driving section, determine whether to limit fuel cell power generation, If the forward driving section is a long steel plate, limit fuel cell power generation and drive the vehicle in the current driving section by consuming only battery output, Vehicle fuel cell power generation control device.
12. In Paragraph 11, The above forward driving information is obtained for each forward driving section classified to include at least a current driving section, a first forward driving section, and a second forward driving section. Vehicle fuel cell power generation control device.
13. In Paragraph 12, The above processor, in order to calculate the required fuel cell output value of the current driving section, Calculate the estimated battery output value, and Calculate the estimated energy requirement for battery charging and discharging by multiplying the above estimated battery output value by the estimated future driving time, and Calculate the required battery charge/discharge output value in the current driving section by dividing the above estimated battery charge/discharge energy requirement by the current estimated driving time, The fuel cell required output value for the current section is determined by adding the battery charge/discharge required output value and the vehicle required output value for the above current driving section. Vehicle fuel cell power generation control device.
14. In Paragraph 13, The above processor is, The fuel cell required output value for the current driving section is determined by correcting the vehicle required output value for driving to the above battery charge/discharge required output value, The fuel cell required output value of the current driving section is determined by adding the vehicle required output value to the battery charge/discharge required output value. Vehicle fuel cell power generation control device.
15. In Paragraph 11, The above processor is, When determining whether to limit the above fuel cell power generation, Determining whether the vehicle can be driven by consuming only battery output by comparing the battery discharge output limit value and the EV driving-capable battery discharge output determination value, Vehicle fuel cell power generation control device.
16. In paragraph 15, The above processor is, If it is determined that the vehicle can be driven solely by battery output in the above current driving section, Comparing the fuel cell required output value of the current driving section with the fuel cell power generation requirement determination value during vehicle operation, Vehicle fuel cell power generation control device.
17. In Paragraph 16, The above processor is, If the required fuel cell output value of the current driving section is smaller, limiting fuel cell power generation even when performing battery discharge in the current driving section, Vehicle fuel cell power generation control device.
18. In paragraph 15 or 16, The above processor is, When the vehicle's battery discharge exceeds a certain standard during the current driving section, fuel cell power generation is not restricted, Vehicle fuel cell power generation control device.
19. In Paragraph 17, The above processor is, In the case of limiting the above fuel cell power generation, Even if the first forward driving section and the second forward driving section are long steel plates, discharging the battery SOC by consuming only battery output when driving the vehicle in the current driving section, Vehicle fuel cell power generation control device.
20. In Paragraph 18, In cases where the above fuel cell power generation is not restricted, Controlling fuel cell power generation during vehicle operation in the above current driving section to charge or discharge the battery SOC according to the first forward driving section and the second forward driving section, Vehicle fuel cell power generation control device.

Description

Method and device for controlling fuel cells using forward driving information of fuel cell vehicles The present disclosure relates to a fuel cell control method and apparatus using forward driving information of a fuel cell vehicle, and more specifically, to a fuel cell control method and apparatus that considers forward driving information obtained from a peripheral device of the vehicle, limits fuel cell power generation to secure a battery charge SOC before driving on a long steel plate, and performs EV (Electric Vehicle) driving. Generally, a vehicle (also referred to as a 'mobile body') controls the vehicle based on the current state of the vehicle and the current will of the driver. Fuel cell power generation control in conventional commercial fuel cell vehicles (FCEVs) may be a method of determining an FC power generation map according to the SOC of a high-voltage battery by calculating the vehicle's required output based on the amount of the driver's accelerator pedal and the output used by vehicle components. Specifically, conventional commercial fuel cell vehicles (FCEVs) control fuel cell power generation by calculating the vehicle's required output based on the driver's accelerator pedal input and the output usage of vehicle components, and determining an FC generation map based on the high-voltage battery's State of Charge (SOC). In this case, even if the road ahead involves steep inclines or steep rivers, power is generated solely based on the FC generation map in the current driving section, leading to the problem of being unable to secure sufficient battery SOC for the future driving section. In addition, when predicting the expected battery output value required for the forward driving section, an error occurs in which the accurate battery requirement cannot be calculated because the expected output value is not predicted by considering the change in elevation changes of the forward driving section. In other words, conventional FCEV vehicles may fail to secure sufficient battery SOC for the preceding driving section because they perform fuel cell control and battery output simultaneously, even when the vehicle's battery discharge is required during the current driving section due to the separated forward driving section being a long steel plate. Consequently, vehicle performance deteriorates during driving on steel plates, and since the driver must use the brakes to maintain speed, this results in the disadvantage of increased brake pad wear. Accordingly, there is a need for a measure to calculate the estimated battery output value required for future driving sections by utilizing information on the road ahead for each section obtained from the vehicle's peripheral devices, and to restrict fuel cell power generation even when the vehicle is currently operating in the current driving section based on the calculated estimated battery output value. FIG. 1 is a block diagram illustrating a configuration module of a vehicle equipped with a fuel cell control device according to an embodiment of the present invention. FIGS. 2a and 2b are flowcharts of a fuel cell power generation control method for a vehicle according to an embodiment of the present disclosure when vehicle driving is performed in a current driving section. FIGS. 3a and 3b are diagrams showing a battery SOC prediction control process for a vehicle for fuel cell power generation control according to the present disclosure, segment by segment according to the current driving section and at least two forward driving sections. FIG. 4 is a flowchart showing the operating mechanism of a fuel cell power generation control device of a vehicle for securing battery charge SOC prior to driving on a steel plate according to an embodiment of the present disclosure. FIGS. 5A and 5B are graphs showing test data regarding the presence or absence (on/off) of smart power control in the current driving section according to an embodiment of the present disclosure. Hereinafter, embodiments of the present disclosure are described in detail with reference to the attached drawings so that those skilled in the art can easily implement them. However, the present disclosure may be embodied in various different forms and is not limited to the embodiments described herein. In describing the embodiments of the present disclosure, if it is determined that a detailed description of known configurations or functions could obscure the essence of the present disclosure, such detailed description is omitted. Additionally, parts of the drawings unrelated to the description of the present disclosure have been omitted, and similar parts are denoted by similar reference numerals. In the present disclosure, when a component is described as being “connected,” “combined,” or “joined” with another component, this may include not only a direct connection but also an indirect connection in which another component exists in between. Furthermore, when a component is described a