Control method of oil-electricity hybrid power system, oil-electricity hybrid power system and cold chain transport vehicle

Abstract

The invention discloses a control method of an oil-electricity hybrid power system, the oil-electricity hybrid power system and a cold chain transport vehicle, the oil-electricity hybrid power system is applied to the cold chain transport vehicle, and the oil-electricity hybrid power system comprises a fuel oil generator set and an energy storage device connected with the fuel oil generator set. The fuel oil generator set and the energy storage device are both connected with a refrigerating unit assembled on the cold chain transport vehicle, and the control method comprises the steps that under the condition that the fuel oil generator set supplies power to the energy storage device and the refrigerating unit, the electricity utilization power of the refrigerating unit is obtained; and according to the electricity utilization power of the refrigerating unit and a target power interval, the charging power provided by the fuel oil generator set for the energy storage device is adjusted, so that the actual output power of the fuel oil generator set is maintained within the target power interval, and the target power interval is set according to a preset oil consumption threshold value of the fuel oil generator set. According to the invention, the oil consumption of the oil-electric hybrid power system of the cold-chain transport vehicle is reduced.

Description

Technical Field

[0001] The present invention relates to the field of cold chain transport vehicles, and in particular to a control method of an oil-electric hybrid system, an oil-electric hybrid system and a cold chain transport vehicle. Background Art

[0002] The power consumption of the refrigeration unit equipped in the railway cold chain transport vehicle will change with the change of the external ambient temperature. When the temperature in the refrigerated container reaches the set temperature, the refrigeration unit will stop refrigerating. At this time, the power consumption of the refrigeration unit is extremely low, and it only supplies power to maintain the monitoring system of the refrigeration unit.

[0003] The oil-electric hybrid system equipped in the railway cold chain transport vehicle supplies power to the refrigeration unit. The oil-electric hybrid system includes a fuel generator set and a battery pack. When the battery pack needs to be charged, the battery fuel generator set charges the battery pack and provides the refrigeration unit with the power of the refrigeration unit. At this time, the power of the refrigeration unit will be superimposed on the fuel generator set. In order to make the fuel generator set bear the maximum power of the refrigeration unit, the rated power of the fuel generator set needs to be increased. This method violates the original design intention of the oil-electric hybrid system. Summary of the invention

[0004] The present invention provides a control method of an oil-electric hybrid system, an oil-electric hybrid system and a cold chain transport vehicle, so as to reduce the fuel consumption of the oil-electric hybrid system of the cold chain transport vehicle.

[0005] In a first aspect of the present invention, a control method for an oil-electric hybrid system is provided, wherein the oil-electric hybrid system is applied to a cold chain transport vehicle, wherein the oil-electric hybrid system comprises a fuel generator set and an energy storage device connected to the fuel generator set, wherein both the fuel generator set and the energy storage device are connected to a refrigeration unit installed on the cold chain transport vehicle, and wherein the control method comprises: obtaining the electric power consumption of the refrigeration unit when the fuel generator set supplies power to the energy storage device and the refrigeration unit; and adjusting the charging power provided by the fuel generator set to the energy storage device according to the electric power consumption and a target power range so that the actual output power of the fuel generator set is maintained within the target power range, wherein the target power range is set according to a preset fuel consumption threshold of the fuel generator set.

[0006] In combination with the first aspect, in some embodiments, adjusting the charging power provided by the fuel generator set to the energy storage device according to the power consumption and the target power range includes: determining a reference power according to the target power range; determining the actual output power of the fuel generator set according to the power consumption; determining the power difference between the reference power and the actual output power; and adjusting the charging power provided by the fuel generator set to the energy storage device according to the power difference.

[0007] In combination with the first aspect, in some embodiments, adjusting the charging power provided by the fuel generator set to the energy storage device according to the power difference includes: obtaining a required power limit of the energy storage device; determining a target power value according to the power difference; if the target power value is less than or equal to the required power limit, adjusting the charging power provided by the fuel generator set to the energy storage device to the target power value; if the target power value is greater than the required power limit, adjusting the charging power provided by the fuel generator set to the energy storage device to the required power limit.

[0008] In combination with the first aspect, in some embodiments, determining the reference power according to the target power range includes: taking the minimum power value within the target power range as the reference power, wherein the target power range is 70% to 90% of the rated power of the fuel generator set.

[0009] In combination with the first aspect, in some embodiments, the preset fuel consumption threshold is the fuel consumption rate corresponding to the optimal fuel consumption point of the fuel generator set; the target power range is the required power of the fuel generator set at the optimal fuel consumption point determined according to the universal characteristic curve of the fuel generator set.

[0010] In combination with the first aspect, in some embodiments, the adjusting the charging power provided by the fuel generator set to the energy storage device according to the power consumption and the target power range of the fuel generator set includes: after the power consumption of the refrigeration unit decreases, increasing the charging power provided by the fuel generator set to the energy storage device according to the power consumption and the target power range; during the operation of the fuel generator set, predicting the next time the power consumption of the refrigeration unit increases; before the next time the power consumption of the refrigeration unit increases, reducing the charging power provided by the fuel generator set to the energy storage device according to the power consumption and the target power range.

[0011] In combination with the first aspect, in some embodiments, adjusting the charging power provided by the fuel generator set to the energy storage device according to the power consumption and the target power range includes: determining a reference power according to the target power range; taking the difference between the reference power and the power consumption of the refrigeration unit as the target power value; and adjusting the charging power provided by the fuel generator set to the energy storage device to the target power value.

[0012] In combination with the first aspect, in some embodiments, determining the reference power according to the target power range includes: taking the minimum power value within the target power range as the reference power, wherein the target power range is 70% to 90% of the rated power of the fuel generator set.

[0013] In combination with the first aspect, in some embodiments, the preset fuel consumption threshold is the fuel consumption rate of the fuel generator set at the optimal fuel consumption point; the target power range is the required power of the fuel generator set at the optimal fuel consumption point determined according to the universal characteristic curve of the fuel generator set.

[0014] In combination with the first aspect, in some embodiments, adjusting the charging power provided by the fuel generator set to the energy storage device according to the power consumption and the target power range includes: after the power consumption of the refrigeration unit decreases, increasing the charging power provided by the fuel generator set to the energy storage device according to the power consumption and the target power range; during the operation of the fuel generator set, predicting the next time the power consumption of the refrigeration unit increases; before the next time the power consumption of the refrigeration unit increases, reducing the charging power provided by the fuel generator set to the energy storage device according to the power consumption and the target power range.

[0015] In combination with the first aspect, in some embodiments, predicting the time when the power consumption of the refrigeration unit will increase next time includes: predicting the time when the power consumption of the refrigeration unit will increase next time through a pre-established prediction model.

[0016] In combination with the first aspect, in some embodiments, predicting the next time when the power consumption of the refrigeration unit will increase by using a pre-established prediction model includes: in the first usage period of the refrigeration unit, predicting the next time when the power consumption of the refrigeration unit will increase by using a first prediction model pre-established according to the power consumption change law of the prototype.

[0017] In combination with the first aspect, in some embodiments, the control method also includes: obtaining historical operating data of the refrigeration unit, and optimizing the first prediction model based on the historical operating data; predicting the next time when the power consumption of the refrigeration unit will increase through the pre-established prediction model includes: after the first usage period, predicting the next time when the power consumption of the refrigeration unit will increase based on the optimized first prediction model.

[0018] In combination with the first aspect, in some embodiments, the control method also includes: recording a power supply change pattern of the energy storage device supplying power to the refrigeration group during a first usage period of the refrigeration group; establishing a second prediction model based on the power supply change pattern of the energy storage device; and predicting the next time when the power consumption of the refrigeration group will increase through a pre-established prediction model, including: after the first usage period, predicting the next time when the power consumption of the refrigeration group will increase through the second prediction model.

[0019] In a second aspect of the present invention, a control device for an oil-electric hybrid system is provided, wherein the oil-electric hybrid system is applied to a cold chain transport vehicle, wherein the oil-electric hybrid system comprises a fuel generator set and an energy storage device connected to the fuel generator set, wherein both the fuel generator set and the energy storage device are connected to a refrigeration unit installed on the cold chain transport vehicle, and wherein the control device comprises: an acquisition unit for acquiring the electric power consumption of the refrigeration unit when the fuel generator set supplies power to the energy storage device and the refrigeration unit; and an adjustment unit for adjusting the charging power provided by the fuel generator set to the energy storage device according to the electric power consumption and a target power range, so that the actual output power of the fuel generator set is maintained within the target power range, wherein the target power range is set according to a preset fuel consumption threshold of the fuel generator set.

[0020] In the third aspect of the present invention, a hybrid electric system is provided, which is applied to cold chain transport vehicles, and the hybrid electric system includes: a fuel generator set connected to the refrigeration unit of the cold chain transport vehicle; an energy storage device, the fuel generator set and the refrigeration unit are connected; a charging control device, connected to the fuel generator set, the energy storage device and the refrigeration unit, wherein the charging control device includes: a processor; a memory for storing executable instructions of the processor, wherein the processor is configured to execute the instructions to implement the control method of the hybrid electric system described in any embodiment of the first aspect.

[0021] In a fourth aspect of the present invention, a cold chain transport vehicle is provided, comprising the oil-electric hybrid system described in any embodiment of the third aspect.

[0022] In a fifth aspect of the present invention, a computer-readable storage medium is provided, on which a computer program is stored, and when the program is executed by a processor, the control method of the hybrid system described in any embodiment of the first aspect is implemented.

[0023] One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:

[0024] When the fuel generator set supplies power to the energy storage device and the refrigeration unit, the power consumption of the refrigeration unit is obtained; the charging power provided by the fuel generator set to the energy storage device is adjusted according to the power consumption and the target power range of the fuel generator set, so that the actual output power of the fuel generator set is maintained within the target power range, wherein the target power range makes the fuel consumption of the fuel generator set meet the preset fuel consumption threshold setting, thereby, the charging power provided by the fuel generator set to charge the energy storage device can be dynamically adjusted according to the change of the power consumption of the refrigeration unit, so that the actual output power of the fuel generator set is maintained within the power range with a smaller fuel consumption rate most of the time, thereby reducing the fuel consumption of the oil-electric hybrid system of the cold chain transport vehicle, saving energy, and further improving the economy of the oil-electric hybrid system of the cold chain transport vehicle.

[0025] Since the actual output power of the fuel-fired generator set is maintained in a power range with a lower fuel consumption rate most of the time, the failure rate of the fuel-fired generator set can also be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 A schematic diagram showing the connection between an oil-electric hybrid system and a refrigeration unit according to some embodiments of the present invention is shown;

[0028] Figure 2 Shows Figure 1 The power supply logic of the Sinopec hybrid system to the refrigeration unit;

[0029] Figure 3 A flow chart showing a control method of a hybrid electric system according to some embodiments of the present invention is shown;

[0030] Figure 4 A schematic diagram of data collection of a charging control device is shown;

[0031] Figure 5 A schematic structural diagram of an oil-electric hybrid system according to some embodiments of the present invention is shown. DETAILED DESCRIPTION

[0032] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0033] First of all, the term "and / or" in this article is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0034] The present invention provides a control method for a hybrid electric system, and the hybrid electric system is applied to a cold chain transport vehicle, that is, the hybrid electric system is used to be installed on a cold chain transport vehicle, for example, the hybrid electric system can be installed on a railway cold chain transport vehicle. It can be understood that the cold chain transport vehicle includes a refrigerated container, a refrigeration unit and a hybrid electric system.

[0035] Figure 1 A schematic diagram showing the connection between an oil-electric hybrid system and a refrigeration unit according to some embodiments of the present invention is shown. Figure 1 As shown, the oil-electric hybrid system 10 includes a fuel generator set 110, an energy storage device 120 connected to the fuel generator set 110, and the fuel generator set 110 and the energy storage device 120 are both connected to the refrigeration unit 30 installed on the cold chain transport vehicle. The energy storage device 120 includes a battery pack 121 (the battery pack 121 can be a lithium battery pack) and a charging device 122. When the fuel generator set 110 is started, the fuel generator set 110 supplies power to the energy storage device 120 and the refrigeration unit 20. When the fuel generator set 110 is stopped, the battery pack 121 is used to provide DC power to the refrigeration unit 30. When the fuel generator set 110 charges the energy storage device 120, it outputs AC power to the charging device 122, and the charging device 122 converts the AC power into DC power to charge the battery pack 121. The fuel generator set 110 is also used to provide AC power to the refrigeration unit 30, and the energy storage device 120 is used to provide DC power to the refrigeration unit 30.

[0036] Figure 2 Shows Figure 1 The power supply logic of the Sinopec hybrid system to the refrigeration unit. Figure 2 As shown, the power supply logic of the oil-electric hybrid system to the refrigeration unit is to cycle through the following steps S1 to S5 to supply power to the refrigeration unit. Under normal circumstances, the energy storage device and the fuel generator set will not supply power to the refrigeration unit at the same time:

[0037] Step S1: receiving a power supply command instructing to supply power to a refrigeration unit;

[0038] Step S2: Determine whether the remaining power of the energy storage device is lower than the low power threshold (e.g., 20%). If so, proceed to step S3; if not, proceed to step S5, wherein the remaining power can be characterized by SOC (State Of Charge);

[0039] Step S3: The fuel-fired generator set supplies power to the refrigeration unit and charges the energy storage device, and then proceeds to step S4;

[0040] Step S4: Determine whether the remaining power of the energy storage device is greater than or equal to a high power threshold (e.g., 90%). If so, proceed to step S5; if not, return to step S3.

[0041] Step S5: the fuel generator set is shut down, the energy storage device discharges to supply power to the refrigeration unit, and the process returns to step S2.

[0042] A control method for an oil-electric hybrid system provided in an embodiment of the present invention is used for dynamically adjusting the charging power provided by the fuel generator set to charge the energy storage device according to the change in the power consumption of the refrigeration unit when the fuel generator set supplies power to the refrigeration unit and the energy storage device in the above step S4. Figure 3 FIG. 1 is a flow chart showing a control method of a hybrid electric system according to some embodiments of the present invention. Figure 3 As shown, the control method of the oil-electric hybrid system includes the following steps S301-S302.

[0043] In step S301: when the fuel-fired generator set supplies power to the energy storage device and the refrigeration unit, the power consumption of the refrigeration unit is obtained.

[0044] It should be understood that since the power consumption of the refrigeration unit changes with the temperature in the refrigerated container, and when the temperature in the refrigerated container reaches the set temperature, the refrigeration unit will stop refrigerating, and the power consumption of the refrigeration unit will become very low. Therefore, it is necessary to obtain the power consumption of the refrigeration unit in real time at a certain frequency, and after each acquisition of the power consumption of the refrigeration unit, step S302 is executed.

[0045] In step S302: the charging power provided by the fuel generator set to the energy storage device is adjusted according to the power consumption and the target power range, so that the actual output power of the fuel generator set is maintained within the target power range, wherein the target power range is set according to a preset fuel consumption threshold of the fuel generator set.

[0046] It should be noted that the actual output power of the fuel-fired generator set is the sum of the power provided by the refrigeration unit and the charging power provided by the fuel-fired generator set to the energy storage device.

[0047] In some embodiments, the target power range is a power range corresponding to 70% to 90% of the rated power of the fuel generator set, which can make the fuel consumption rate of the fuel generator set lower than a preset fuel consumption threshold, wherein the preset fuel consumption threshold is an upper limit value set for the fuel consumption rate of the fuel generator set.

[0048] In some embodiments, the target power interval is the required power to make the fuel consumption rate of the fuel generator set at the optimal fuel consumption point, wherein the optimal fuel consumption point is the minimum fuel consumption rate of the fuel generator set determined according to the universal characteristic curve of the fuel generator set. In other words, the target power interval is the required power at the optimal fuel consumption point determined according to the universal characteristic curve of the fuel generator set, and the required power of the fuel generator set at the optimal fuel consumption point is 70% to 90% of the rated power. In other words, the actual output power of the fuel generator set is maintained at 70% to 90% of the rated power, which can minimize the fuel consumption rate of the fuel generator set.

[0049] In some embodiments, a universal characteristic curve of the fuel-fired generator set is obtained, and the required power of the fuel-fired generator set at the optimal fuel consumption point is calculated based on the universal characteristic curve to obtain a target power range.

[0050] In some embodiments, in step S301, adjusting the charging power provided by the fuel generator set to the energy storage device according to the power consumption of the refrigeration unit and the target power range may include: determining a reference power according to the target power range; determining the actual output power of the fuel generator set according to the power consumption of the refrigeration unit; determining the power difference between the reference power and the actual output power; and adjusting the charging power provided by the fuel generator set to the energy storage device according to the power difference.

[0051] In some embodiments, adjusting the charging power provided by the fuel generator set to the energy storage device according to the power difference may include: taking the difference between the reference power and the actual output power as the power difference, taking the sum of the charging power provided by the fuel generator set to the energy storage device and the power difference as the target power value, and adjusting the actual charging power provided by the fuel generator set to the energy storage device from the charging power to the target power value.

[0052] Next, taking the reference power of 14kW as an example, the power consumption of the refrigeration unit is 8kW, and the charging power provided to the energy storage device is 6kW, so that the actual output power of the fuel generator set meets 14kW. As the temperature in the refrigerated container changes, the power consumption of the refrigeration unit may rise to 10kW, but the charging power provided by the fuel generator set to the energy storage device has not changed in time. The actual output power of the fuel generator set is 16kW, which has a power difference of -2kW with the reference power of 14kW. The sum of the charging power of 6kW provided by the fuel generator set to the energy storage device and the power difference of -2kW is 4kW, and the charging power provided by the fuel generator set to the energy storage device is adjusted to 4kW, thereby maintaining the actual output power of the fuel generator set at 14kW.

[0053] In other embodiments, adjusting the charging power provided by the fuel generator set to the energy storage device according to the power difference may include: taking the absolute value of the difference between the reference power and the actual output power of the fuel generator set as the power difference; if the power consumption of the refrigeration unit increases, increasing the charging power provided by the fuel generator set to the energy storage device by the amount of adjustment being the power difference; if the power consumption of the refrigeration unit decreases, decreasing the charging power provided by the fuel generator set to the energy storage device by the amount of adjustment being the power difference.

[0054] Taking the reference power of 14kW as an example, the power consumption of the refrigeration unit is 8kW, and the charging power provided to the energy storage device is 6kW, so that the actual output power of the fuel generator set meets 14kW. As the temperature in the refrigerated container changes, the power consumption of the refrigeration unit may drop to 6kW, but the charging power provided to the energy storage device has not changed in time. The actual output power of the fuel generator set is 12kW, which has a power difference of 2kW with the reference power of 14kW. The sum of the charging power of 6kW provided by the fuel generator set to the energy storage device and the power difference of 2kW is 8kW. After the charging power provided by the fuel generator set to the energy storage device is increased by 2kW, it reaches 8kW. Therefore, the actual output power of the fuel generator set is maintained at 14kW.

[0055] In order to charge the energy storage device within a safe range to protect the energy storage device. In some embodiments, the step of adjusting the charging power provided by the fuel generator set to the energy storage device according to the power difference may include: obtaining the required power limit of the energy storage device; determining the target power value according to the power difference; if the target power value is less than or equal to the required power limit, adjusting the charging power provided by the fuel generator set to the energy storage device to the target power value; if the target power value is greater than the required power limit, adjusting the charging power provided by the fuel generator set to the energy storage device to the required power limit.

[0056] It should be noted that the required power limit is the maximum allowable charging power set to protect the energy storage device. The above embodiment can ensure that the charging power provided by the fuel generator set to the energy storage device does not exceed the required power threshold, thereby protecting the energy storage device.

[0057] In some embodiments, in step S301, adjusting the charging power provided by the fuel generator set to the energy storage device according to the power consumption and the target power range may include: determining a reference power according to the target power range; taking the difference between the reference power and the power consumption of the refrigeration unit as the target power value; and adjusting the charging power provided by the fuel generator set to the energy storage device to the target power value.

[0058] Taking the reference power of 14kW as an example, the power consumption of the refrigeration unit is 8kW, and the charging power provided to the energy storage device is 6kW, so that the actual output power of the fuel generator set meets 14kW. As the temperature in the refrigerated container changes, the power consumption of the refrigeration unit may drop to 7kW, and the charging power provided by the fuel generator set to the energy storage device has not had time to change. The difference between the reference power and the power consumption of the refrigeration unit changes to 7kW, then the charging power provided by the fuel generator set to the energy storage device is adjusted to 7kW, thereby maintaining the actual output power of the fuel generator set at 14kW.

[0059] In any of the above embodiments, determining the reference power according to the target power range may include: using the minimum power value in the target power range as the reference power. For example, if the target power range is 14-18 kW, 14 kW is used as the reference power.

[0060] It should be noted that, when the power consumption of the refrigeration unit increases, the charging power provided by the fuel generator set to the energy storage device is adjusted according to the power consumption and the target power range, so that the charging power provided by the fuel generator set to the energy storage device is lowered; when the power consumption of the refrigeration unit decreases, the charging power provided by the fuel generator set to the energy storage device is adjusted according to the power consumption and the target power range, so that the charging power provided by the fuel generator set to the energy storage device is increased, and the actual output power of the fuel generator set can be maintained within the target power range. Therefore, by adjusting the charging power of the energy storage device, the fuel generator set can work in the power range of the optimal fuel consumption point most of the time, which increases the fuel utilization rate and can also reduce the failure rate of the fuel generator set.

[0061] In some embodiments, the power consumption of the refrigeration unit obtained in the above step S301 may be the actual power consumption of the refrigeration unit currently collected by a detection circuit.

[0062] Since the actual current power consumption of the refrigeration unit collected by the detection circuit lags behind the corresponding power provided by the fuel-fired generator set to the refrigeration unit, that is, it lags behind the actual change of the power consumption of the refrigeration unit, that is, when a certain power value of the power consumption of the refrigeration unit is collected, the fuel-fired generator set has actually borne this power value for a certain period of time. In order to avoid the total power required by the refrigeration unit and the energy storage device exceeding the rated power of the fuel-fired generator set: in the case where the power consumption of the refrigeration unit increases, the charging power provided by the fuel-fired generator set to the energy storage device can be reduced in advance before the power consumption of the refrigeration unit increases; in the case where the power consumption of the refrigeration unit decreases, the charging power provided by the fuel-fired generator set to the energy storage device can be increased with a lag after the power consumption of the refrigeration unit decreases.

[0063] Therefore, in other embodiments, obtaining the power consumption of the refrigeration unit in the above step S301 may include: collecting the current actual power consumption of the refrigeration unit through a detection circuit, and predicting the future power consumption of the refrigeration unit through a prediction model, wherein the future power consumption is the power value of the refrigeration unit after the power consumption of the refrigeration unit increases next time. In the case where the power consumption of the refrigeration unit decreases, the power consumption of the refrigeration unit used in step S302 is the current actual power consumption of the refrigeration unit collected by the detection circuit, and in the case where the power consumption of the refrigeration unit increases, the power consumption of the refrigeration unit used in step S302 is the future power consumption of the refrigeration unit predicted by the prediction model.

[0064] In some embodiments, the charging power provided by the fuel generator set to the energy storage device is adjusted according to the power consumption and the target power interval of the fuel generator set, including: after the power consumption of the refrigeration unit decreases, the charging power provided by the fuel generator set to the energy storage device is increased according to the power consumption of the refrigeration unit and the target power interval; during the operation of the fuel generator set, the time when the power consumption of the refrigeration unit increases next time is predicted; before the next time the power consumption of the refrigeration unit increases, the charging power provided by the fuel generator set to the energy storage device is decreased according to the power consumption and the target power interval. It should be understood that here only the time point of increasing or decreasing the charging power is limited, and the adjustment amount of increasing or decreasing the charging power is described in any of the previous embodiments, and for the sake of brevity of the specification, it will not be repeated here.

[0065] In some embodiments, during the first usage period of the refrigeration unit, the time when the power consumption of the refrigeration unit will increase next time is predicted based on a first prediction model, wherein the first prediction model is pre-established based on the power consumption change pattern of the same model prototype as the refrigeration unit, wherein the first usage period is a period of time from the start time of the first use of the refrigeration unit.

[0066] In some embodiments, the control method of the hybrid system also includes: obtaining historical operating data of the refrigeration unit, wherein the historical operating data includes historical ambient temperature, historical power consumption and historical start and stop time of the refrigeration unit; optimizing the first prediction model according to the historical operating data, so that the first prediction model can more accurately predict the time point when the power of the refrigeration unit increases and the future power consumption, thereby correcting the regulation logic of the charging power provided to the energy storage device to achieve economic maximization as much as possible.

[0067] In some embodiments, historical operation data of the refrigeration unit within a current time window is obtained according to a preset update frequency and time window, and the first prediction model is optimized based on the historical operation data within the current time window.

[0068] In other embodiments, the power supply change law of the energy storage device to the refrigeration unit is recorded during the first use period of the refrigeration unit; and a second prediction model is established based on the power supply change law of the energy storage device; after the first use period, the second prediction model is used to predict the next time when the power consumption of the refrigeration unit increases and the future power consumption. In this way, the adjustment logic of the charging power provided to the energy storage device is corrected according to the actual power consumption of the refrigeration unit, so as to achieve economic maximization as much as possible.

[0069] Based on the same inventive concept, an embodiment of the present invention also provides an oil-electric hybrid system for use in cold chain transport vehicles. Figure 4 Figure 2 shows a schematic diagram of data acquisition for a charging control device. Figure 1 and Figure 4 As shown, the oil-electric hybrid system 10 includes: a fuel generator set 110 connected to a refrigeration unit 20 of a cold chain transport vehicle; an energy storage device 120, the fuel generator set 110 and the refrigeration unit 20 are connected. It also includes a charging control device 130, which is connected to the fuel generator set 110, the refrigeration unit 20 and the energy storage device 120.

[0070] Figure 5 FIG. 2 shows a schematic diagram of the structure of an oil-electric hybrid system according to some embodiments of the present invention. Figure 5 As shown, the charging control device 130 includes: one or more memories 404, one or more processors 402, and at least one computer program (computer execution instruction) stored in the memory 404 and executable on the processor 402. When the processor 402 executes the computer program, the control method of the hybrid system described in any of the above embodiments is implemented.

[0071] Among them, Figure 5 In the embodiment of the present invention, a bus architecture (represented by bus 400) is shown, which may include any number of interconnected buses and bridges, and bus 400 connects various circuits including one or more processors represented by processor 402 and memory represented by memory 404. Bus 400 may also connect various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and are not further described herein. Bus interface 405 provides an interface between bus 400 and receiver 401 and transmitter 403. Receiver 401 and transmitter 403 may be the same element, namely a transceiver, providing a unit for communicating with various other devices over a transmission medium. Processor 402 is responsible for managing bus 400 and general processing, while memory 404 may be used to store data used by processor 402 when performing operations.

[0072] like Figure 4As shown, in order to control the charging power provided by the fuel generator set 110 to the energy storage device 120, the charging control device 130 needs to obtain the power consumption of the refrigeration unit 20 and the required power limit of the energy storage device 120 in real time, and also needs to obtain the universal characteristic curve of the fuel generator set 110.

[0073] Based on the same inventive concept, an embodiment of the present invention further provides a cold chain transport vehicle, comprising a refrigerated container, a refrigeration unit and the oil-electric hybrid system of any of the above embodiments.

[0074] Based on the same inventive concept, an embodiment of the present invention also provides a control device for an oil-electric hybrid system, the oil-electric hybrid system is applied to a cold chain transport vehicle, the oil-electric hybrid system includes a fuel generator set, and an energy storage device connected to the fuel generator set, the fuel generator set and the energy storage device are both connected to a refrigeration unit installed on the cold chain transport vehicle, and the control device includes: an acquisition unit, which is used to acquire the power consumption of the refrigeration unit when the fuel generator set supplies power to the energy storage device and the refrigeration unit; an adjustment unit, which is used to adjust the charging power provided by the fuel generator set to the energy storage device according to the power consumption and the target power range, so that the actual output power of the fuel generator set is maintained within the target power range, wherein the target power range is set according to the preset fuel consumption threshold of the fuel generator set. It can be understood that more implementation details of the control device of the oil-electric hybrid system can refer to the control method of the above-mentioned oil-electric hybrid system, and for the sake of brevity of the specification, it will not be repeated here.

[0075] Based on the same inventive concept, an embodiment of the present invention further provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the control method of the above-mentioned hybrid system is implemented.

[0076] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0077] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0078] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0079] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0080] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0081] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A control method for a hybrid system, characterized in that: The oil-electric hybrid system is applied to a cold chain transport vehicle, and the oil-electric hybrid system includes a fuel generator set and an energy storage device connected to the fuel generator set. The fuel generator set and the energy storage device are both connected to a refrigeration unit installed on the cold chain transport vehicle. The control method includes: When the fuel-fired generator set supplies power to the energy storage device and the refrigeration unit, obtaining the power consumption of the refrigeration unit; The charging power provided by the fuel generator set to the energy storage device is adjusted according to the power consumption and the target power range so that the actual output power of the fuel generator set is maintained within the target power range, wherein the target power range is set according to a preset fuel consumption threshold of the fuel generator set.

2. The control method of the oil-electric hybrid system according to claim 1, characterized in that: The step of adjusting the charging power provided by the fuel-fired generator set to the energy storage device according to the power consumption and the target power interval includes: Determining a reference power according to the target power interval; Determine the actual output power of the fuel-fired generator set according to the power consumption; determining a power difference between the reference power and the actual output power; The charging power provided by the fuel generator set to the energy storage device is adjusted according to the power difference.

3. The control method of the oil-electric hybrid system according to claim 2, characterized in that: The step of adjusting the charging power provided by the fuel-fired generator set to the energy storage device according to the power difference comprises: Obtaining a required power limit of the energy storage device; determining a target power value according to the power difference; If the target power value is less than or equal to the required power limit, adjusting the charging power provided by the fuel generator set to the energy storage device to the target power value; If the target power value is greater than the required power limit, the charging power provided by the fuel generator set to the energy storage device is adjusted to the required power limit.

4. The control method of the oil-electric hybrid system according to claim 1, characterized in that: The step of adjusting the charging power provided by the fuel-fired generator set to the energy storage device according to the power consumption and the target power interval includes: Determining a reference power according to the target power interval; Taking the difference between the reference power and the power consumption of the refrigeration unit as the target power value; The charging power provided by the fuel generator set to the energy storage device is adjusted to the target power value.

5. The control method of the oil-electric hybrid system according to claim 2 or 4, characterized in that: The determining the reference power according to the target power interval includes: The minimum power value within the target power range is used as the reference power, wherein the target power range is 70% to 90% of the rated power of the fuel-fired generator set.

6. The control method of the oil-electric hybrid system according to claim 5, characterized in that: The preset fuel consumption threshold is the fuel consumption rate of the fuel generator set at the optimal fuel consumption point; the target power range is the required power of the fuel generator set at the optimal fuel consumption point determined according to the universal characteristic curve of the fuel generator set.

7. The control method of the oil-electric hybrid system according to claim 1, characterized in that: The step of adjusting the charging power provided by the fuel-fired generator set to the energy storage device according to the power consumption and the target power interval includes: After the power consumption of the refrigeration unit decreases, increasing the charging power provided by the fuel generator set to the energy storage device according to the power consumption and the target power range; During the operation of the fuel-fired generator set, predicting the time when the power consumption of the refrigeration unit will increase next time; Before the next time when the power consumption of the refrigeration unit increases, the charging power provided by the fuel generator set to the energy storage device is reduced according to the power consumption and the target power range.

8. The control method of the oil-electric hybrid system according to claim 7, characterized in that: Predicting the time when the power consumption of the refrigeration unit increases next time, including: The time when the power consumption of the refrigeration unit will increase next time is predicted by a pre-established prediction model.

9. The control method of the oil-electric hybrid system according to claim 8, characterized in that: The predicting, by using a pre-established prediction model, the time when the power consumption of the refrigeration unit will increase next time comprises: During the first use period of the refrigeration unit, a first prediction model pre-established according to a power consumption variation rule of the prototype unit is used to predict the time when the power consumption of the refrigeration unit will increase next time.

10. The control method of the oil-electric hybrid system according to claim 9, characterized in that: Also includes: Acquire historical operation data of the refrigeration unit, and optimize the first prediction model according to the historical operation data; The predicting, by using a pre-established prediction model, the time when the power consumption of the refrigeration unit will increase next time comprises: After the first usage period, the time when the power consumption of the refrigeration unit increases next time is predicted according to the optimized first prediction model.

11. The control method of the oil-electric hybrid system according to claim 8, characterized in that: Also includes: Recording a power supply change pattern of the energy storage device supplying power to the refrigeration unit during the first use period of the refrigeration unit; Establishing a second prediction model according to the power supply variation law of the energy storage device; Predicting the time when the power consumption of the refrigeration unit will increase next time by using a pre-established prediction model includes: After the first usage period, the second prediction model is used to predict the time when the next power consumption of the refrigeration unit increases.

12. A control device for a hybrid system, characterized in that: The oil-electric hybrid system is applied to a cold chain transport vehicle, and the oil-electric hybrid system includes a fuel generator set and an energy storage device connected to the fuel generator set. The fuel generator set and the energy storage device are both connected to a refrigeration unit installed on the cold chain transport vehicle. The control device includes: an acquisition unit, used for acquiring the power consumption of the refrigeration unit when the fuel-fired generator set supplies power to the energy storage device and the refrigeration unit; An adjustment unit is used to adjust the charging power provided by the fuel generator set to the energy storage device according to the power consumption and the target power range, so that the actual output power of the fuel generator set is maintained within the target power range, wherein the target power range is set according to a preset fuel consumption threshold of the fuel generator set.

13. A hybrid system for cold chain transport vehicles, the hybrid system comprising: A fuel-fired generator set connected to the refrigeration unit of the cold chain transport vehicle; An energy storage device, the fuel-fired generator set and the refrigeration unit are connected; A charging control device connected to the fuel generator set, the energy storage device and the refrigeration unit, wherein the charging control device includes: a processor; a memory for storing instructions executable by the processor, wherein the processor is configured to execute the instructions to implement the control method of the oil-electric hybrid system according to any one of claims 1 to 11.

14. A cold chain transport vehicle, characterized in that: Including the oil-electric hybrid system as described in claim 13.

15. A computer-readable storage medium having a computer program stored thereon, wherein when the program is executed by a processor, the control method of the oil-electric hybrid system according to any one of claims 1 to 11 is implemented.

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