Hybrid power control system and engineering machinery

Abstract

The invention belongs to the technical field of new energy engineering machinery, and discloses a hybrid power control system and engineering machine.The hybrid power control system comprises an electric drive device, a power battery device, a fuel cell device and a power supply control device, and the electric drive device is in drive connection with an upper vehicle transmission device and a chassis transmission device; the power supply control device is electrically connected with the electric driving device, the power battery device and the fuel battery device respectively, and is configured to control the power battery device to supply power to the electric driving device in a pure electric mode under the condition that the residual electric quantity of the power battery device reaches a first electric quantity threshold value; under the condition that the residual electric quantity of the power battery device does not reach the first electric quantity threshold value, the fuel battery device is controlled to participate in power supply to the electric drive device and charging of the power battery device, and compared with pure electric engineering machinery, the endurance mileage is obviously increased, the energy utilization rate is higher, and the product performance is higher.

Description

Technical Field

[0001] The present invention belongs to the technical field of new energy engineering machinery, and in particular relates to a hybrid power control system and engineering machinery. Background Art

[0002] Construction machinery plays an important role in the national economic construction. In recent years, the rapid development of new energy technology has provided strong support for the green development of construction machinery. However, the construction machinery currently using new energy architecture is generally pure electric version, which relies on power batteries to provide power for driving and on-board operations. However, the power of power batteries is limited and the charging speed is slow, resulting in short cruising range of construction machinery and long waiting time for charging, which seriously affects the operation efficiency. Summary of the invention

[0003] In view of the above-mentioned defects or shortcomings, the present invention provides a hybrid power control system and engineering machinery, aiming to solve the technical problems of short cruising range and long charging waiting time in pure electric version of engineering machinery.

[0004] To achieve the above-mentioned object, the first aspect of the present invention provides a hybrid power control system, wherein the hybrid power control system includes an electric drive device, a power battery device, a fuel cell device and a power supply control device; the electric drive device is arranged on the vehicle body and is respectively connected to the upper vehicle transmission device and the chassis transmission device; the power battery device is arranged on the vehicle body; the fuel cell device is arranged on the vehicle body; the power supply control device is respectively connected to the electric drive device, the power battery device and the fuel cell device, and is configured as follows:

[0005] When the remaining power of the power battery device reaches a first power threshold, controlling the power battery device to supply power to the electric drive device in a pure electric mode;

[0006] When the remaining power of the power battery device does not reach the first power threshold, the fuel cell device is controlled to participate in supplying power to the electric drive device and charging the power battery device.

[0007] In one embodiment of the present invention, when the remaining power of the power battery device does not reach the first power threshold, controlling the fuel cell device to participate in supplying power to the electric drive device and charging the power battery device includes:

[0008] When a driving start command is received and the remaining power of the power battery device does not reach a first power threshold, controlling the fuel cell device and the power battery device to supply power to the electric drive device in a parallel hybrid power supply mode;

[0009] When the current output power of the fuel cell device reaches the power required for current driving, the fuel cell device is controlled to supply power to the electric drive device in pure fuel mode; and when the current output power exceeds the power required for current driving, the fuel cell device is simultaneously controlled to charge the power battery device.

[0010] In one embodiment of the present invention, when a driving start instruction is received and the remaining power of the power battery device does not reach a first power threshold, controlling the fuel cell device and the power battery device to supply power to the electric drive device in a parallel hybrid power supply mode includes:

[0011] When a driving start command is received and the remaining power of the power battery device does not reach a first power threshold, determining the compensation power of the power battery device according to the current driving required power and the current output power of the fuel cell device;

[0012] The fuel cell device and the power battery device are controlled according to the compensation power of the power battery device to supply power to the electric drive device in a parallel hybrid power supply mode.

[0013] In one embodiment of the present invention, when a driving start instruction is received and the remaining power of the power battery device does not reach a first power threshold, determining the compensation power of the power battery device according to the current driving required power and the current output power of the fuel cell device includes:

[0014] When a driving start command is received and the remaining power of the power battery device is between a second power threshold and a first power threshold, if the current driving required power is less than the maximum output power of the fuel cell device, the current output power of the fuel cell device is controlled to respond according to the current driving required power and the compensation power of the power battery device is determined; if the current driving required power is greater than the maximum output power of the fuel cell device, the current output power of the fuel cell device is controlled to respond according to the maximum output power and the compensation power of the power battery device is determined, wherein the second power threshold is less than the first power threshold;

[0015] When a driving start command is received and the remaining power of the power battery device has not reached the second power threshold, if the current driving required power is less than the maximum output power of the fuel cell device, the current output power of the fuel cell device is controlled to respond according to the sum of the current driving required power and the set value and the compensation power of the power battery device is determined; if the current driving required power is greater than or equal to the maximum output power of the fuel cell device, the current output power of the fuel cell device is controlled to respond according to the maximum output power and the compensation power of the power battery device is determined.

[0016] In one embodiment of the present invention, when the remaining power of the power battery device does not reach the first power threshold, controlling the fuel cell device to participate in supplying power to the electric drive device and charging the power battery device further includes:

[0017] When receiving the vehicle operation start instruction and the remaining power of the power battery device does not reach the second power threshold, controlling the fuel cell device to supply power to the electric drive device in a pure fuel mode, wherein the second power threshold is less than the first power threshold;

[0018] When the on-vehicle operation start command is received and the remaining power of the power battery device is between the second power threshold and the first power threshold, if the electric drive device is powered in pure fuel mode before the remaining power of the power battery device enters the power threshold range, the fuel cell device continues to be controlled to power the electric drive device in pure fuel mode and charges the power battery device at the same time; if the electric drive device is powered in pure electric mode before the remaining power of the power battery device enters the power threshold range, the power battery device continues to be controlled to power the electric drive device in pure electric mode.

[0019] In one embodiment of the present invention, the hybrid power control system further includes an on-board charging device electrically connected to the power supply control device, the on-board charging device can be externally connected to a power supply, and the power supply control device is further configured as follows:

[0020] When receiving the on-board operation start command and the on-board charging device is connected to an external power source, the power required for the on-board operation is compared with the input power of the external power source;

[0021] If the power required for the on-board operation is greater than the input power of the external power supply, the power battery device and the on-board charging device are controlled to supply power to the electric drive device at the same time;

[0022] If the power required for the on-board operation is equal to the input power of the external power supply, the on-board charging device is controlled to supply power to the electric drive device in plug-in mode;

[0023] If the power required for the on-vehicle operation is less than the input power of the external power supply, the on-vehicle charging device is controlled to power the electric drive device in plug-in mode while charging the power battery device.

[0024] In one embodiment of the present invention, when the remaining power of the power battery device reaches a first power threshold, controlling the power battery device to supply power to the electric drive device in a pure electric mode includes:

[0025] When a driving start instruction is received and the remaining power of the power battery device reaches a first power threshold, comparing the current driving required power with the maximum output power of the power battery device;

[0026] If the power required for current driving is less than the maximum output power of the power battery device, the power battery device is controlled to supply power to the electric drive device in pure electric mode according to the power required for current driving;

[0027] If the power required for current driving is greater than or equal to the maximum output power of the power battery device, the power battery device is controlled to supply power to the electric drive device in a pure electric mode according to the maximum output power of the power battery device.

[0028] In one embodiment of the present invention, the electric drive device, the fuel cell device and the power supply control device are arranged on the lower part of the vehicle body, and the power battery device is arranged on the upper part of the vehicle body and placed in the counterweight device.

[0029] In one embodiment of the present invention, the counterweight device includes a first counterweight arranged on a turntable seat of the upper vehicle and a second counterweight detachably connected to the first counterweight, and the first counterweight and the second counterweight are stacked up and down, and the second counterweight has an installation inner cavity that is open on one side facing the first counterweight, and the installation inner cavity can be used to accommodate a power battery device.

[0030] To achieve the above objective, a second aspect of the present invention provides an engineering machine, wherein the engineering machine includes the hybrid power control system described above.

[0031] Through the above technical solution, the hybrid power control system provided by the present invention has the following beneficial effects:

[0032] When the construction machinery uses the above-mentioned hybrid power control system, since a fuel cell device is additionally provided, and the power supply control device can not only control the power battery device to supply power to the electric drive device in a pure electric mode when the remaining power of the power battery device reaches a first power threshold, but can also control the fuel cell device to participate in supplying power to the electric drive device when the remaining power of the power battery device does not reach the first power threshold, and control the fuel cell device to charge the power battery device. Compared with the pure electric version of the construction machinery, the cruising range is significantly improved, the charging time is greatly shortened, the energy utilization rate is higher, the product performance is stronger, thereby improving user satisfaction.

[0033] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the embodiments of the present invention, but do not constitute a limitation on the embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative work. In the accompanying drawings:

[0035] Figure 1 is a schematic diagram of the control principle of a hybrid power control system according to an embodiment of the present invention;

[0036] Figure 2 is a schematic structural diagram of an engineering machinery according to an embodiment of the present invention;

[0037] Figure 3 is a schematic diagram of the disassembled structure of a counterweight device according to an embodiment of the present invention;

[0038] Figure 4 is a control flow chart of a power supply control device according to an embodiment of the present invention;

[0039] Figure 5 is a power supply and demand relationship diagram of a first driving condition according to an embodiment of the present invention;

[0040] Figure 6 is a power supply and demand relationship diagram of a second driving condition according to an embodiment of the present invention;

[0041] Figure 7 is a power supply and demand relationship diagram of a third driving condition according to an embodiment of the present invention;

[0042] Figure 8 4 is a diagram of power supply and demand in a fourth driving condition according to an embodiment of the present invention.

[0043] Description of reference numerals:

[0044] 100 Electric drive device 200 Power battery device

[0045] 300 Fuel cell device 310 Storage device

[0046] 320 fuel cell body 400 power supply control device

[0047] 500 Upper transmission 600 Chassis transmission

[0048] 700 Rotating device 800 On-board charging device

[0049] 900 counterweight device 910 first counterweight

[0050] 920 Second counterweight 710 Turntable seat DETAILED DESCRIPTION

[0051] The specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0052] The hybrid power control system and the construction machine of the present invention will be described below with reference to the accompanying drawings.

[0053] like Figure 1 and Figure 2 As shown, the present invention provides a hybrid power control system, wherein the hybrid power control system comprises:

[0054] The electric drive device 100 is arranged on the vehicle body and is drivingly connected to the upper vehicle transmission device 500 and the chassis transmission device 600 respectively;

[0055] The power battery device 200 is arranged on the vehicle body;

[0056] A fuel cell device 300 is provided on a vehicle body;

[0057] The power supply control device 400 is electrically connected to the electric drive device 100, the power battery device 200 and the fuel cell device 300, respectively, and is configured as follows:

[0058] When the remaining power of the power battery device 200 reaches a first power threshold, the power battery device 200 is controlled to supply power to the electric drive device 100 in a pure electric mode;

[0059] When the remaining power of the power battery device 200 does not reach the first power threshold, the fuel cell device 300 is controlled to participate in supplying power to the electric drive device 100 and charging the power battery device 200 .

[0060] When the engineering machinery uses the above hybrid power control system, since the fuel cell device 300 is additionally provided, and the power supply control device 400 can not only control the power battery device 200 to supply power to the electric drive device 100 in pure electric mode when the remaining power of the power battery device 200 reaches the first power threshold, but also can control the fuel cell device 300 to participate in supplying power to the electric drive device 100 and control the fuel cell device 300 to charge the power battery device 200 when the remaining power of the power battery device 200 does not reach the first power threshold. Compared with the pure electric version of the engineering machinery, the cruising range is significantly improved, the charging time is greatly shortened, the energy utilization rate is higher, the product performance is stronger, and the user satisfaction is improved. It should be particularly noted that when the remaining power of the power battery device 200 does not reach the first power threshold, although the fuel cell device 300 participates in supplying power to the electric drive device 100, it does not limit whether the power battery device 200 supplies power to the electric drive device 100.

[0061] Specifically, the electric drive device 100 may include an electric drive assembly, a power take-off and a transmission shaft. The electric drive assembly includes a motor and a gearbox. The motor has a motor controller. The motor controller controls the motor to drive the gearbox. The gearbox is connected to the power take-off and the transmission shaft respectively. The vehicle transmission device 500 can be set as an oil pump transmission device for driving the vehicle operation. The chassis transmission device 600 can be set as a drive axle for driving the chassis. At the same time, the electric drive device 100 can drive the oil pump transmission device through the power take-off, and drive the drive axle through the transmission shaft. The power supply control device 400 can be set as an all-in-one controller to integrate the functions of multiple controllers into one device, reduce the complexity of the system, reduce the occupied space, improve the stability and reliability of the system, and reduce the manufacturing cost. In addition, the fuel cell device 300 includes but is not limited to a hydrogen fuel cell device 300.

[0062] More specifically, the power battery device 200 is preset with a power threshold range for normal operation, the maximum value of the power threshold range is set to the first power threshold, which can be specifically 80% to 90%, preferably 80%, and the minimum value of the power threshold range is set to the second power threshold, which can be specifically 15% to 25%, preferably 20%.

[0063] See also Figure 4 In one embodiment of the present invention, when the remaining power of the power battery device 200 does not reach the first power threshold, controlling the fuel cell device 300 to participate in supplying power to the electric drive device 100 and charging the power battery device 200 includes:

[0064] Step S100 , when a driving start command is received and the remaining power of the power battery device 200 does not reach a first power threshold, the fuel cell device 300 and the power battery device 200 are controlled to supply power to the electric drive device 100 in a parallel hybrid power supply mode.

[0065] Specifically, the construction machinery has two modes: chassis driving mode and vehicle operation mode. When the hybrid power control system receives a driving start command, the control enters the chassis driving mode, and the electric drive device 100 switches to drive the chassis transmission device 600. Since the fuel cell has the characteristic of taking a certain amount of time to start, when the remaining power of the power battery device 200 does not reach the first power threshold, the fuel cell device 300 and the power battery device 200 can be controlled to work simultaneously or alternately and supply power to the electric drive device 100 respectively in the early stage of the construction machinery starting to drive, so as to realize the power supply of the parallel hybrid power supply mode. This enables the power battery device 200 to intervene in the early driving stage to perform dynamic power compensation.

[0066] Step S110, when the current output power of the fuel cell device 300 reaches the power required for current driving, the fuel cell device 300 is controlled to supply power to the electric drive device 100 in pure fuel mode, and when the current output power exceeds the power required for current driving, the fuel cell device 300 is controlled to charge the power battery device 200 at the same time.

[0067] It can be understood that the power required for current driving and the current output power of the fuel cell device 300 are divided into the accelerator pedal depressed stage (power demand rapidly rising stage), the accelerator pedal held stage (power demand fluctuating stage) and the accelerator pedal released stage (power demand rapidly decreasing stage) during each throttle control process. The power required for current driving varies with the depth of the throttle pedal at different stages. The current output power of the fuel cell device 300 can respond to the power required for current driving in the early stage. In the later stage, if the maximum output power of the fuel cell device 300 is less than the power required for current driving, the current output power of the fuel cell device 300 can respond to the maximum output power. It should be noted that Figures 5 to 8 The power supply and demand relationship in the figure is a simplified drawing. The power supply and demand should fluctuate in the three stages.

[0068] Specifically, in one of the three stages of the current driving power required, the current output power of the fuel cell device 300 will be equal to the current driving power required, for example, if the maximum output power of the fuel cell device 300 is less than the current driving power required, the above situation may occur in the stage where the power demand of the current driving power required is rapidly decreasing; or if the maximum output power of the fuel cell device 300 is equal to the current driving power required, the above situation may occur in the stage where the power demand of the current driving power required fluctuates; or if the maximum output power of the fuel cell device 300 is greater than the current driving power required, the above situation may occur in the stage where the power demand of the current driving power required is rapidly increasing or fluctuating. When the current output power of the fuel cell device 300 reaches the current driving power required, it proves that the power output of the fuel cell device 300 can meet the driving requirements. At this time, the power battery device 200 can be controlled to stop supplying power, and the fuel cell device 300 can be controlled to continue supplying power, thereby entering the pure fuel mode, which plays a role in saving power batteries. In addition, after the current output power of the fuel cell device 300 reaches the power required for current driving, the current output power of the fuel cell device 300 will inevitably exceed the power required for current driving. At this time, the output power of the fuel cell device 300 is surplus. By supplying the surplus electric energy to the power battery device 200, the power battery can be powered without an external power supply, saving charging waiting time.

[0069] In one embodiment of the present invention, in step S100, when a driving start instruction is received and the remaining power of the power battery device 200 does not reach a first power threshold, controlling the fuel cell device 300 and the power battery device 200 to supply power to the electric drive device 100 in a parallel hybrid power supply mode includes:

[0070] When a driving start command is received and the remaining power of the power battery device 200 does not reach the first power threshold, the compensation power of the power battery device 200 is determined according to the current driving required power and the current output power of the fuel cell device 300;

[0071] The fuel cell device 300 and the power battery device 200 are controlled according to the compensation power of the power battery device 200 to supply power to the electric drive device 100 in a parallel hybrid power supply mode.

[0072] Specifically, after determining the current output power of the fuel cell device 300, the power required for current driving can be compared with the current output power of the fuel cell device 300, specifically, the current power required for driving minus the current output power of the fuel cell device 300. If it is a positive value, it can be determined as the compensation power of the power battery device 200, so that the fuel cell device 300 can supply power to the electric drive device 100 at the same time according to the current output power and the power battery device 200 can supply power to the electric drive device 100 at the same time in a parallel hybrid power supply mode, that is, the power battery device 200 can perform dynamic automatic compensation control of power according to the power output control result of the fuel cell device 300.

[0073] In one embodiment of the present invention, when a driving start command is received and the remaining power of the power battery device 200 does not reach the first power threshold, determining the compensation power of the power battery device 200 according to the current driving required power and the current output power of the fuel cell device 300 includes:

[0074] When a driving start command is received and the remaining power of the power battery device 200 is between the second power threshold and the first power threshold, if the current driving required power is less than the maximum output power of the fuel cell device 300, the current output power of the fuel cell device 300 is controlled to respond according to the current driving required power and determine the compensation power of the power battery device 200; if the current driving required power is greater than the maximum output power of the fuel cell device 300, the current output power of the fuel cell device 300 is controlled to respond according to the maximum output power of the fuel cell device 300 and determine the compensation power of the power battery device 200, wherein the second power threshold is less than the first power threshold;

[0075] When a driving start command is received and the remaining power of the power battery device 200 has not reached the second power threshold, if the current driving required power is less than the maximum output power of the fuel cell device 300, the current output power of the fuel cell device 300 is controlled to respond according to the sum of the current driving required power and the set value and the compensation power of the power battery device 200 is determined; if the current driving required power is greater than the maximum output power of the fuel cell device 300, the current output power of the fuel cell device 300 is controlled to respond according to the maximum output power of the fuel cell device 300 and the compensation power of the power battery device 200 is determined.

[0076] It can be understood that after receiving the driving start instruction, the situation where the remaining power of the power battery device 200 does not reach the first power threshold can also be subdivided. The situation where the remaining power of the power battery device 200 does not reach the first power threshold is divided into a situation within the power threshold range (i.e., between the second power threshold and the first power threshold) and a situation where the second power threshold is not reached, thereby making it possible to further select the current output power response of the fuel cell device 300 more appropriately according to the corresponding specific situation.

[0077] Specifically, when the remaining power of the power battery device 200 is within the power threshold range, since the remaining power of the power battery device 200 is relatively sufficient to meet greater dynamic compensation, even if the power required for current driving is less than the maximum output power of the fuel cell device 300, it is only necessary to respond the current output power of the fuel cell device 300 to the power required for current driving, without excessive consumption of fuel in the fuel cell device 300. Of course, before the current output power of the fuel cell device 300 reaches the power required for current driving, the power battery device 200 needs to perform power compensation. The above situation is set as the first driving condition. The specific power supply and demand relationship of the first driving condition is as follows: Figure 5As shown, when the current output power of the fuel cell device 300 is determined to be the power required for the current driving, when the current output power of the fuel cell device 300 is in the stage of rapid increase in power demand, since the current output power response of the fuel cell device 300 cannot keep up with the power required for the current driving, the power battery device 200 discharges to compensate for the lack of power, which belongs to the parallel hybrid power supply mode; when the current output power of the fuel cell device 300 is in the stage of power demand fluctuation, since the current output power of the fuel cell device 300 can keep up with the power required for the current driving, the power battery device 200 does not need to discharge. Driving power compensation belongs to the pure fuel mode. It should be noted that at this stage, the power required for current driving fluctuates, but the current output power of the fuel cell device 300 can respond to the power required for current driving, and can maintain the pure fuel mode until the accelerator begins to release. At this time, the current power required for driving and the current output power of the fuel cell device 300 both enter a stage of rapid decline in power demand. This stage is very short, but because the current output power of the fuel cell device 300 is always greater than the current power required for driving, the fuel cell device 300 can charge the power battery device 200 at this stage.

[0078] In addition, when the current driving power required is greater than the maximum output power of the fuel cell device 300, in order to save the power of the power battery device 200, the current output power of the fuel cell device 300 is determined as the maximum output power of the fuel cell device 300. The above situation is set as the second driving condition. The specific power demand relationship of the second driving condition is as follows: Figure 6As shown, in the case where the current output power of the fuel cell device 300 is determined to respond to the maximum output power of the fuel cell device 300, when the current output power of the fuel cell device 300 is in the power demand rapid increase stage and the power demand fluctuation stage, since the current output power response of the fuel cell device 300 is less than the maximum output power required for current driving, in order to meet the driving needs, the power battery device 200 needs to discharge in both stages to make up for the lack of power, which belongs to the parallel hybrid power supply mode. The parallel hybrid power supply mode is maintained for a long time until the power required for driving enters the power demand rapid decrease stage and the current driving power required decreases to the same level as the fuel cell device 300. The mode is switched only when the current output power is equal, but the time of the rapid decrease in power demand is very short; when the power required for current driving drops to be equal to the current output power of the fuel cell device 300, that is, the power required for current driving reaches the current output power of the fuel cell device 300, at this time, not only can the current output power of the fuel cell device 300 be controlled to start entering the rapid decrease in power demand stage, but the power battery device 200 can also be controlled to stop supplying power, and the fuel cell device 300 supplies power in pure fuel mode, and because the subsequent current output power of the fuel cell device 300 is greater than the power required for current driving, the power battery device 200 can also be charged while supplying power in pure fuel mode.

[0079] Specifically, when the remaining power of the power battery device 200 has not reached the second power threshold, since the remaining power of the power battery device 200 is too low to meet the larger dynamic compensation, when the power required for current driving is less than the maximum output power of the fuel cell device 300, the current output power of the fuel cell device 300 can be determined to respond to a power value greater than the power required for current driving. A set value can be preset in advance, that is, the current output power of the fuel cell device 300 is determined to respond to the sum of the power required for current driving and the set value. Of course, the sum of the power required for current driving and the set value should be less than or equal to the maximum output power of the fuel cell device 300, so that the current output power of the fuel cell device 300 can reach and exceed the power required for current driving as soon as possible, and switch to the pure fuel mode and charge the power battery device 200 in advance. The above situation is set as the third driving condition. The specific power supply and demand relationship of the third driving condition is as follows. Figure 7As shown, when the current output power of the fuel cell device 300 is determined to be the sum of the power required for the current driving and the set value, the current output power of the fuel cell device 300 can reach the power required for the current driving during the rapid increase in power demand. At this moment, the current output power of the fuel cell device 300 has not yet reached the maximum output power, and at this moment, the power battery device 200 can be controlled to stop discharging, and then switch from the parallel hybrid power supply mode to the pure fuel mode, which significantly shortens the discharge time of the power battery device 200. Since the current output power of the subsequent fuel cell device 300 continues to maintain an upward trend, it will immediately exceed the power required for the current driving, thereby enabling the fuel cell device 300 to be controlled to charge the power battery device 200 while switching to the pure fuel mode, and the pure fuel mode continues until the rapid decrease in power demand of the fuel cell device 300 ends.

[0080] In addition, when the current driving power required is greater than the maximum output power of the fuel cell device 300, in order to save the power of the power battery device 200, the current output power of the fuel cell device 300 is determined as the maximum output power of the fuel cell device 300. The above situation is set as the fourth driving condition. The specific power demand relationship of the fourth driving condition is as follows: Figure 8 As shown, when the current output power of the fuel cell device 300 is determined to be the maximum output power of the fuel cell device 300, the current required power for driving will reach the current output power of the fuel cell device 300 only when the current required power for driving is in the stage of rapid power demand decline, and the current output power at this time should be in the stage of power demand fluctuation. At this moment, the parallel hybrid power supply mode can be switched to the pure fuel mode, and since from this moment on, the current output power of the fuel cell device 300 will be greater than the current required power for driving, the power battery device 200 can be charged while the pure fuel mode starts to supply power. More specifically, after the current required power for driving drops to the current output power of the fuel cell device 300, the fuel cell device 300 can also be controlled to stop power output after the current output power response is maintained at the maximum output power for a period of time, so as to replenish sufficient power to the power battery device 200.

[0081] It should be particularly noted that, when the difference between the current driving required power and the current output power is a positive value, the difference is determined as the compensation power of the power battery device 200 .

[0082] In one embodiment of the present invention, when the remaining power of the power battery device 200 does not reach the first power threshold, controlling the fuel cell device 300 to participate in powering the electric drive device 100 and charging the power battery device 200 further includes:

[0083] When receiving the vehicle loading operation start instruction and the remaining power of the power battery device 200 does not reach the second power threshold, the fuel cell device 300 is controlled to supply power to the electric drive device 100 in the pure fuel mode, and the fuel cell device 300 is continuously controlled to charge the power battery device 200 when the vehicle loading operation is in a stop interval, wherein the second power threshold is less than the first power threshold;

[0084] When the on-vehicle operation start command is received and the remaining power of the power battery device 200 is between the second power threshold and the first power threshold, if the electric drive device 100 is powered in pure fuel mode before the remaining power of the power battery device 200 enters the power threshold range, the fuel cell device 300 continues to be controlled to power the electric drive device 100 in pure fuel mode and charges the power battery device 200 at the same time; if the electric drive device 100 is powered in pure electric mode before the remaining power of the power battery device 200 enters the power threshold range, the power battery device 200 continues to be controlled to power the electric drive device 100 in pure electric mode.

[0085] Further, when the hybrid power control system receives the vehicle boarding operation start instruction, the control enters the vehicle boarding operation mode, and the electric drive device 100 switches to drive the vehicle boarding transmission device 500. Although the power required for the vehicle boarding operation is small, when the remaining power of the power battery device 200 does not reach the second power threshold, the power of the power battery device 200 is low and cannot meet the requirements of the vehicle boarding operation, so the pure fuel mode is used to power the electric drive device 100, and when the vehicle boarding operation is in a stop gap, the fuel cell device 300 can be controlled to charge the power battery device 200. Of course, during the vehicle boarding operation, if the power required for the vehicle boarding operation is lower than the set output power of the fuel cell device 300, the excess power of the fuel cell device 300 can also be used to charge the power battery device 200.

[0086] In addition, when the remaining power of the power battery device 200 is between the second power threshold and the first power threshold, it is still impossible to maintain it by relying solely on the power battery device 200, and in order to ensure the maximum utilization of energy, if the pure fuel mode is used to power the electric drive device 100 before the remaining power of the power battery device 200 enters the power threshold range, the fuel cell device 300 is still controlled to power the electric drive device 100 in the pure fuel mode, and when the set output power of the fuel cell device 300 is higher than the power required for the on-board operation, the fuel cell device 300 is also controlled to power the electric drive device 100 in the pure fuel mode. The device 300 supplies power to the power battery device 200 until the remaining power of the power battery device 200 is greater than the first power threshold, and then switches to the pure electric mode to supply power to the electric drive device 100; if the pure electric mode is used to supply power to the electric drive device 100 before the remaining power of the power battery device 200 enters the power threshold range, the power battery device 200 continues to be controlled to supply power to the electric drive device 100 in the pure electric mode until the remaining power of the power battery device 200 is less than or equal to the second power threshold, and then switches to the pure fuel mode to supply power to the electric drive device 100. At the same time, when the vehicle operation is in a stop gap, the fuel cell device 300 can be controlled to charge the power battery device 200.

[0087] It should be noted that the output power of the fuel cell device 300 during the on-board operation can always be maintained at a certain value, that is, the set output power, which can be specifically 30% to 50% of the maximum output power of the fuel cell device 300 .

[0088] Furthermore, when a vehicle operation start instruction is received and the remaining power of the power battery device 200 reaches a first power threshold, that is, when the remaining power is greater than or equal to the first power threshold, it is set to control the power battery device 200 to power the electric drive device 100 in a pure electric mode.

[0089] See also Figure 1 In one embodiment of the present invention, the hybrid power control system further includes an on-board charging device 800 electrically connected to the power supply control device 400, the on-board charging device 800 can be connected to an external power supply, and the power supply control device 400 is further configured as follows:

[0090] When receiving the vehicle operation start instruction and the vehicle-mounted charging device 800 is connected to an external power source, the power required for the vehicle operation is compared with the input power of the external power source;

[0091] If the power required for the vehicle operation is greater than the input power of the external power supply, the power battery device 200 and the on-board charging device 800 are controlled to supply power to the electric drive device 100 at the same time;

[0092] If the power required for the on-vehicle operation is equal to the input power of the external power supply, the on-vehicle charging device 800 is controlled to supply power to the electric drive device 100 in the plug-in mode;

[0093] If the power required for the on-vehicle operation is less than the input power of the external power supply, the on-vehicle charging device 800 is controlled to supply power to the electric drive device 100 in the plug-in mode while the on-vehicle charging device 800 is controlled to charge the power battery device 200 .

[0094] Specifically, in addition to the pure fuel mode and the pure electric mode, the on-board operation mode can also realize the plug-in mode by adding an on-board charging device 800, which saves the power of the power battery device 200 and shortens the charging waiting time. When the power required for the on-board operation is greater than the input power of the external power supply, the power battery device 200 and the on-board charging device 800 are controlled to supply power to the electric drive device 100 at the same time, so that the power battery device 200 can compensate for the needs to ensure the normal operation of the on-board operation. When the power required for the on-board operation is less than the input power of the external power supply, not only can the on-board charging device 800 be controlled to supply power to the electric drive device 100 in the plug-in mode, but also the on-board charging device 800 can be controlled to charge the power battery device 200 at the same time, thereby further shortening the charging waiting time.

[0095] In one embodiment of the present invention, when the remaining power of the power battery device 200 reaches a first power threshold, controlling the power battery device 200 to supply power to the electric drive device 100 in a pure electric mode includes:

[0096] When a driving start command is received and the remaining power of the power battery device 200 reaches a first power threshold, the current driving required power is compared with the maximum output power of the power battery device 200;

[0097] If the power required for the current driving is less than the maximum output power of the power battery device 200, the power battery device 200 is controlled to supply power to the electric drive device 100 in a pure electric mode according to the power required for the current driving;

[0098] If the current driving required power is greater than or equal to the maximum output power of the power battery device 200 , the power battery device 200 is controlled to supply power to the electric drive device 100 in a pure electric mode according to the maximum output power of the power battery device 200 .

[0099] It can be understood that when the remaining power of the power battery device 200 is above the first power threshold, the remaining power can meet the demand even if the vehicle is driven in a purely electric manner, and the output power of the power battery device 200 does not need to consider the remaining power of the power battery device 200, and only needs to compare the current driving power with the maximum output power of the power battery device 200, thereby making the design of the control logic simpler. When the current driving power is less than the maximum output power of the power battery device 200, the current driving power is used as the output power of the power battery device 200, so as to ensure the normal operation of the driving.

[0100] like Figure 2 and Figure 3 As shown, in one embodiment of the present invention, the electric drive device 100, the fuel cell device 300 and the power supply control device 400 are arranged on the lower part of the vehicle body, and the power battery device 200 is arranged on the upper part of the vehicle body and placed in the counterweight device 900. Since the fuel cell device 300 includes a fuel cell body 320, a material storage device 310, related heat dissipation devices and related electrical components, it needs to occupy a large space. Therefore, it is more reasonable to arrange the fuel cell device 300 on the lower part of the vehicle with a larger space, and to arrange the power battery device 200 on the upper part of the vehicle with a smaller space. At the same time, the lower part space is also convenient for the storage device 310 (for example: the hydrogen storage bottle of the hydrogen fuel cell device 300) to expand in quantity and / or capacity. The more quantity and the larger capacity, the longer the cruising range. In addition, placing the power battery device 200 in the counterweight device 900 can not only play the role of counterweight, but also play a protective role, achieving multiple goals at one stroke. Specifically, the electrical connection between the power battery device 200 and the power supply control device 400 on the lower part of the vehicle can be guided to the lower part of the vehicle through the collector ring on the rotary device 700 of the engineering machinery.

[0101] In one embodiment of the present invention, the counterweight device 900 includes a first counterweight 910 disposed on the turntable seat 710 of the upper vehicle and a second counterweight 920 detachably connected to the first counterweight 910, and the first counterweight 910 and the second counterweight 920 are stacked up and down, and the second counterweight 920 has an installation inner cavity which is openly disposed toward one side of the first counterweight 910, and the installation inner cavity can accommodate the power battery device 200. The counterweight device 900 is configured as the first counterweight 910 and the second counterweight 920, and the power battery device 200 is disposed on the second counterweight 920, so that when the power battery device 200 is replaced, only the second counterweight 920 needs to be removed, which can obviously reduce the labor intensity, and at the same time, the first counterweight 910 and the second counterweight 920 are stacked up and down, so that the installation inner cavity of the second counterweight 920 does not need to be provided with a cover body, and the installation inner cavity can be sealed by the first counterweight 910.

[0102] Specifically, the first counterweight 910 is placed on the lower side of the turntable seat 710, and the second counterweight 920 is detachably suspended at the lower end of the first counterweight 910 through a threaded connector. The power battery device 200 can also be fixed in the installation cavity of the second counterweight 920 through a threaded connector.

[0103] In addition, the present invention also provides an engineering machine, wherein the engineering machine includes the hybrid power control system described above. Since the engineering machine adopts all the technical solutions of the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here. Specifically, the engineering machine includes but is not limited to a crane.

[0104] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0105] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0106] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0107] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A hybrid power control system, characterized in that: The hybrid power control system comprises: An electric drive device (100) is arranged on the vehicle body and is drivingly connected to the upper vehicle transmission device (500) and the chassis transmission device (600) respectively; A power battery device (200) is arranged on the vehicle body; A fuel cell device (300) is arranged on the vehicle body; The power supply control device (400) is electrically connected to the electric drive device (100), the power battery device (200) and the fuel cell device (300) respectively, and is configured as follows: When the remaining power of the power battery device (200) reaches a first power threshold, controlling the power battery device (200) to supply power to the electric drive device (100) in a pure electric mode; When the remaining power of the power battery device (200) does not reach a first power threshold, the fuel cell device (300) is controlled to participate in supplying power to the electric drive device (100) and charging the power battery device (200).

2. The hybrid power control system according to claim 1, characterized in that: When the remaining power of the power battery device (200) does not reach a first power threshold, controlling the fuel cell device (300) to participate in supplying power to the electric drive device (100) and charging the power battery device (200) comprises: When a driving start instruction is received and the remaining power of the power battery device (200) has not reached a first power threshold, controlling the fuel cell device (300) and the power battery device (200) to supply power to the electric drive device (100) in a parallel hybrid power supply mode; When the current output power of the fuel cell device (300) reaches the power required for current driving, the fuel cell device (300) is controlled to supply power to the electric drive device (100) in a pure fuel mode, and when the current output power exceeds the power required for current driving, the fuel cell device (300) is simultaneously controlled to charge the power battery device (200).

3. The hybrid power control system according to claim 2, characterized in that: When a driving start instruction is received and the remaining power of the power battery device (200) does not reach a first power threshold, controlling the fuel cell device (300) and the power battery device (200) to supply power to the electric drive device (100) in a parallel hybrid power supply mode comprises: When a driving start instruction is received and the remaining power of the power battery device (200) has not reached a first power threshold, determining the compensation power of the power battery device (200) according to the current required driving power and the current output power of the fuel cell device (300); The fuel cell device (300) and the power battery device (200) are controlled according to the compensation power of the power battery device (200) to supply power to the electric drive device (100) in a parallel hybrid power supply mode.

4. The hybrid power control system according to claim 3, characterized in that: The method of determining the compensation power of the power battery device (200) according to the current required power for driving and the current output power of the fuel cell device (300) when a driving start instruction is received and the remaining power of the power battery device (200) has not reached a first power threshold comprises: When a driving start instruction is received and the remaining power of the power battery device (200) is between a second power threshold and a first power threshold, if the current driving required power is less than the maximum output power of the fuel cell device (300), the current output power of the fuel cell device (300) is controlled to respond according to the current driving required power and the compensation power of the power battery device (200) is determined; if the current driving required power is greater than the maximum output power of the fuel cell device (300), the current output power of the fuel cell device (300) is controlled to respond according to the maximum output power and the compensation power of the power battery device (200) is determined, wherein the second power threshold is less than the first power threshold; When a driving start command is received and the remaining power of the power battery device (200) has not reached a second power threshold, if the current driving required power is less than the maximum output power of the fuel cell device (300), the current output power of the fuel cell device (300) is controlled to respond according to the sum of the current driving required power and a set value and the compensation power of the power battery device (200) is determined; if the current driving required power is greater than the maximum output power of the fuel cell device (300), the current output power of the fuel cell device (300) is controlled to respond according to the maximum output power and the compensation power of the power battery device (200) is determined.

5. The hybrid power control system according to claim 1, characterized in that: When the remaining power of the power battery device (200) does not reach the first power threshold, controlling the fuel cell device (300) to participate in supplying power to the electric drive device (100) and charging the power battery device (200) further comprises: When a vehicle-mounting operation start instruction is received and the remaining power of the power battery device (200) has not reached a second power threshold, controlling the fuel cell device (300) to supply power to the electric drive device (100) in a pure fuel mode, wherein the second power threshold is less than the first power threshold; When a vehicle operation start instruction is received and the remaining power of the power battery device (200) is between a second power threshold and a first power threshold, if the electric drive device (100) is powered in a pure fuel mode before the remaining power of the power battery device (200) enters the power threshold range, the fuel cell device (300) continues to be controlled to power the electric drive device (100) in a pure fuel mode and the power battery device (200) is charged at the same time; if the electric drive device (100) is powered in a pure electric mode before the remaining power of the power battery device (200) enters the power threshold range, the power battery device (200) continues to be controlled to power the electric drive device (100) in a pure electric mode.

6. The hybrid power control system according to claim 1, characterized in that: The hybrid power control system further comprises an on-vehicle charging device (800) electrically connected to the power supply control device (400), wherein the on-vehicle charging device (800) can be connected to an external power source, and the power supply control device (400) is further configured as follows: When a vehicle operation start instruction is received and the vehicle-mounted charging device (800) is connected to an external power source, the power required for the vehicle operation is compared with the input power of the external power source; If the power required for the on-board operation is greater than the input power of the external power supply, the power battery device (200) and the on-board charging device (800) are controlled to simultaneously supply power to the electric drive device (100); If the power required for the on-board operation is equal to the input power of the external power supply, controlling the on-board charging device (800) to supply power to the electric drive device (100) in a plug-in mode; If the power required for the on-board operation is less than the input power of the external power supply, the on-board charging device (800) is controlled to supply power to the electric drive device (100) in a plug-in mode while the on-board charging device (800) is controlled to charge the power battery device (200).

7. The hybrid power control system according to any one of claims 1 to 6, characterized in that: When the remaining power of the power battery device (200) reaches a first power threshold, controlling the power battery device (200) to supply power to the electric drive device (100) in a pure electric mode comprises: When a driving start instruction is received and the remaining power of the power battery device (200) reaches a first power threshold, comparing the current required power for driving with the maximum output power of the power battery device (200); If the power required for current driving is less than the maximum output power of the power battery device (200), controlling the power battery device (200) to supply power to the electric drive device (100) in a pure electric mode according to the power required for current driving; If the power required for current driving is greater than or equal to the maximum output power of the power battery device (200), the power battery device (200) is controlled to supply power to the electric drive device (100) in a pure electric mode according to the maximum output power of the power battery device (200).

8. The hybrid power control system according to any one of claims 1 to 6, characterized in that: The electric drive device (100), the fuel cell device (300) and the power supply control device (400) are arranged on the lower part of the vehicle body, and the power battery device (200) is arranged on the upper part of the vehicle body and placed in a counterweight device (900).

9. The hybrid power control system according to claim 8, characterized in that: The counterweight device (900) comprises a first counterweight (910) arranged on a turntable seat (710) of the upper vehicle and a second counterweight (920) detachably connected to the first counterweight (910), wherein the first counterweight (910) and the second counterweight (920) are stacked up and down, and the second counterweight (920) has an installation inner cavity which is openly arranged on one side facing the first counterweight (910), and the installation inner cavity can accommodate the power battery device (200).

10. An engineering machine, characterized in that: The construction machine includes a hybrid power control system according to any one of claims 1 to 9.

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