Hybrid control system and working machine

Abstract

The application belongs to the technical field of new energy engineering machinery, and discloses a hybrid power control system and engineering machinery, wherein the hybrid power control system comprises an electric drive device, a power battery device, a fuel cell device and a power supply control device; the electric drive device is respectively connected with an upper vehicle transmission device and a chassis transmission device in a driving mode; the power supply control device is respectively connected with the electric drive device, the power battery device and the fuel cell device in an electric mode, and is configured to: in the case that the residual power of the power battery device reaches a first power threshold, control the power battery device to supply power to the electric drive device in a pure electric mode; in the case that the residual power of the power battery device does not reach the first power threshold, control the fuel cell device to participate in the power supply to the electric drive device and the charging of the power battery device; compared with the pure electric version of the engineering machinery, the endurance mileage is obviously improved, the energy utilization rate is higher, and the product performance is stronger.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of new energy engineering machinery, and particularly relates to a hybrid power control system and engineering machinery. BACKGROUND

[0002] Engineering 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 engineering machinery. However, the engineering machinery using the new energy architecture is generally pure electric version. The pure electric version relies on the power battery to provide power for driving and on-board operation. However, the power battery has limited power and slow charging speed, which leads to short endurance mileage of the engineering machinery and long charging waiting time, seriously affecting the operation efficiency. SUMMARY

[0003] In view of the above defects or deficiencies, the present application provides a hybrid power control system and engineering machinery, aiming to solve the technical problems of short endurance mileage and long charging waiting time of the pure electric version of engineering machinery.

[0004] To achieve the above-mentioned purpose, the first aspect of the present application provides a hybrid power control system, wherein the hybrid power control system comprises 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 drivingly connected with an on-board transmission device and a chassis transmission device respectively; 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 electrically connected with the electric drive device, the power battery device and the fuel cell device respectively, and is configured to:

[0005] In the case that the remaining power of the power battery device reaches a first power threshold, control the power battery device to supply power to the electric drive device in pure electric mode;

[0006] In the case that the remaining power of the power battery device does not reach the first power threshold, control the fuel cell device to participate in the power supply to the electric drive device and the charging of the power battery device.

[0007] In an embodiment of the present application, in the case that the remaining power of the power battery device does not reach the first power threshold, controlling the fuel cell device to participate in the power supply to the electric drive device and the charging of the power battery device comprises:

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

[0009] In a case where the current output power of the fuel cell device reaches the current travel required power, the fuel cell device is controlled to supply power to the electric drive device in a pure fuel mode, and in a case where the current output power exceeds the current travel required power, the fuel cell device is simultaneously controlled to charge the power battery device.

[0010] In an embodiment of the present application, in a case where the travel start instruction is received and the remaining power of the power battery device does not reach the 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 comprises:

[0011] In a case where the travel start instruction is received and the remaining power of the power battery device does not reach the first power threshold, determining the compensation power of the power battery device according to the current travel required power and the current output power of the fuel cell device;

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

[0013] In an embodiment of the present application, in a case where the travel start instruction is received and the remaining power of the power battery device does not reach the first power threshold, determining the compensation power of the power battery device according to the current travel required power and the current output power of the fuel cell device comprises:

[0014] In a case where the travel start instruction is received and the remaining power of the power battery device is between the second power threshold and the first power threshold, if the current travel 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 to the sum of the current travel required power and a set value and to determine the compensation power of the power battery device, and if the current travel 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 to the maximum output power and to determine the compensation power of the power battery device, wherein the second power threshold is less than the first power threshold;

[0015] In a case where the travel start instruction is received and the remaining power of the power battery device does not reach the second power threshold, if the current travel 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 to the sum of the current travel required power and a set value and to determine the compensation power of the power battery device, and if the current travel 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 to the maximum output power and to determine the compensation power of the power battery device.

[0016] In an embodiment of the present application, in the case that the remaining power of the power battery device does not reach the first power threshold, the control of the fuel cell device to participate in the power supply to the electric drive device and the charging of the power battery device further comprises:

[0017] In the case that the boarding operation starting instruction is received and the remaining power of the power battery device does not reach the second power threshold, the fuel cell device is controlled to supply power to the electric drive device in the pure fuel mode, wherein the second power threshold is less than the first power threshold;

[0018] In the case that the boarding operation starting instruction 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 the pure fuel mode before the remaining power of the power battery device enters the power threshold range, the fuel cell device is continued to be controlled to power the electric drive device in the pure fuel mode and the power battery device is charged at the same time, and if the electric drive device is powered in the pure electric mode before the remaining power of the power battery device enters the power threshold range, the power battery device is continued to be controlled to power the electric drive device in the pure electric mode.

[0019] In an embodiment of the present application, the hybrid power control system further comprises an on-board charging device electrically connected with the power supply control device, the on-board charging device can be externally connected with a power source, and the power supply control device is further configured to:

[0020] In the case that the boarding operation starting instruction is received and the on-board charging device is externally connected with a power source, the boarding operation required power and the external power source input power are compared;

[0021] If the boarding operation required power is greater than the external power source input power, the power battery device and the on-board charging device are controlled to simultaneously power the electric drive device;

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

[0023] If the boarding operation required power is less than the external power source input power, the on-board charging device is controlled to power the electric drive device in the plug-in mode and charge the power battery device at the same time.

[0024] In an embodiment of the present application, in the case that the remaining power of the power battery device reaches the first power threshold, the control of the power battery device to power the electric drive device in the pure electric mode comprises:

[0025] In the case that the boarding operation starting instruction is received and the remaining power of the power battery device reaches the first power threshold, the current driving required power and the maximum output power of the power battery device are compared;

[0026] If the current driving required power 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 the pure electric mode according to the current driving required power;

[0027] If the current driving required power 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 the pure electric mode according to the maximum output power of the power battery device.

[0028] In an embodiment of the present application, the electric drive device, the fuel cell device and the power supply control device are arranged in a lower car of the vehicle body, and the power battery device is arranged in an upper car of the vehicle body and placed in the counterweight device.

[0029] In an embodiment of the present application, the counterweight device comprises a first counterweight arranged on a rotary table seat of the upper car and a second counterweight detachably connected with the first counterweight, and the first counterweight and the second counterweight are arranged in a stacked manner, the second counterweight has an installation inner cavity with an open side facing the first counterweight, and the installation inner cavity can accommodate the power battery device.

[0030] To achieve the above object, the second aspect of the present application provides an engineering machine, wherein the engineering machine comprises the hybrid power control system according to the above.

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

[0032] When the engineering machine uses the hybrid power control system, since the fuel cell device is additionally arranged, and the power supply control device can not only control the power battery device to supply power to the electric drive device in the pure electric mode when the remaining power of the power battery device reaches the first power threshold, but also can control the fuel cell device to participate in the power supply to the electric drive device and control the fuel cell device to charge the power battery device when the remaining power of the power battery device does not reach the first power threshold, compared with the pure electric version of the engineering machine, the endurance mileage is obviously improved, the charging time is greatly shortened, the energy utilization rate is higher, the product performance is stronger, and the user's satisfaction is improved.

[0033] Other features and advantages of the present application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0034] The accompanying drawings are included to provide a further understanding of the embodiments of the present application, and constitute a part of the specification, and are used together with the following specific embodiments to explain the embodiments of the present application, but do not constitute a limitation on the embodiments of the present application. For those skilled in the art, other drawings can be obtained from the structures shown in the drawings without creative labor. In the drawings:

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

[0036] Figure 2 Fig. 2 is a schematic diagram of a structure of a construction machine according to an embodiment of the present application;

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

[0038] Figure 4 Fig. 4 is a control flowchart of a power supply control device according to an embodiment of the present application;

[0039] Figure 5 Fig. 5 is a power supply-demand relationship diagram of a first traveling condition according to an embodiment of the present application;

[0040] Figure 6 Fig. 6 is a power supply-demand relationship diagram of a second traveling condition according to an embodiment of the present application;

[0041] Figure 7 Fig. 7 is a power supply-demand relationship diagram of a third traveling condition according to an embodiment of the present application;

[0042] Figure 8 Fig. 8 is a power supply-demand relationship diagram of a fourth traveling condition according to an embodiment of the present application.

[0043] BRIEF DESCRIPTION OF THE DRAWINGS

[0044] 100 electric drive device 200 power battery device

[0045] 300 fuel cell device 310 material storage device

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

[0047] 500 upper vehicle transmission device 600 chassis transmission device

[0048] 700 slewing device 800 on-board charging device

[0049] 900 counterweight device 910 first counterweight

[0050] 920 second counterweight 710 turret base DETAILED DESCRIPTION

[0051] The specific embodiments of the present application will be described below in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely intended to illustrate and explain the present application, and are not intended to limit the present application.

[0052] The hybrid control system and the engineering machinery of the present application are described below with reference to the accompanying drawings.

[0053] As shown in Figure 1 and Figure 2 The present application provides a hybrid control system, wherein the hybrid control system comprises:

[0054] The electric drive device 100 is arranged on the vehicle body and is drivingly connected with 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] The fuel cell device 300 is arranged on the vehicle body;

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

[0058] In the case that the residual power of the power battery device 200 reaches the first power threshold, the power battery device 200 is controlled to supply power to the electric drive device 100 in the pure electric mode;

[0059] In the case that the residual power of the power battery device 200 does not reach the first power threshold, the fuel cell device 300 is controlled to participate in the power supply to the electric drive device 100 and the charging of the power battery device 200.

[0060] When the engineering machinery uses the above-mentioned hybrid control system, since the fuel cell device 300 is additionally arranged, 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 the pure electric mode in the case that the residual power of the power battery device 200 reaches the first power threshold, but also can control the fuel cell device 300 to participate in the power supply to the electric drive device 100 and the charging of the power battery device 200 in the case that the residual 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 endurance mileage is obviously improved, the charging time is greatly shortened, the energy utilization rate is higher, the product performance is stronger, and the user's satisfaction is improved. It should be particularly pointed out that in the case that the residual power of the power battery device 200 does not reach the first power threshold, although the fuel cell device 300 participates in the power supply to the electric drive device 100, it does not limit whether the power battery device 200 supplies power to the electric drive device 100 or not.

[0061] Specifically, the electric drive device 100 can include an electric drive assembly, a power take-off and a transmission shaft, the electric drive assembly including an electric motor and a gearbox, the electric motor having an electric motor controller thereon, the electric motor controller controlling the electric motor to drive the gearbox, the gearbox being respectively drivingly connected with the power take-off and the transmission shaft, the upper vehicle transmission device 500 can be configured as an oil pump transmission device for driving the upper vehicle operation, the chassis transmission device 600 can be configured as a drive axle for driving the chassis running, and meanwhile 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 configured as a multi-in-one controller, so as to integrate the functions of multiple controllers in 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 provided with a normal working electric quantity threshold range, the maximum value of the electric quantity threshold range is set as a first electric quantity threshold, which can be specifically 80% to 90%, and preferably 80%, and the minimum value of the electric quantity threshold range is set as a second electric quantity threshold, which can be specifically 15% to 25%, and preferably 20%.

[0063] Referring to Figure 4 In an embodiment of the present application, in the case that the remaining electric quantity of the power battery device 200 does not reach the first electric quantity threshold, the control of the fuel cell device 300 to participate in the power supply to the electric drive device 100 and the charging of the power battery device 200 includes:

[0064] Step S100, in the case that a running start instruction is received and the remaining electric quantity of the power battery device 200 does not reach the first electric quantity 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 engineering machinery has two modes of chassis running mode and upper vehicle operation mode, when the hybrid power control system receives a running start instruction, the control enters the chassis running mode, the electric drive device 100 is switched to drive the chassis transmission device 600, and since the fuel cell has the characteristic of needing a certain time to start, when the remaining electric quantity of the power battery device 200 does not reach the first electric quantity 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 at the early stage of starting the running of the engineering machinery, so as to realize the power supply in the parallel hybrid power supply mode. Thus, the power battery device 200 can intervene in the power dynamic compensation in the early running stage.

[0066] Step S110, in the case that the current output power of the fuel cell device 300 reaches the current travel required power, control the fuel cell device 300 to supply power to the electric drive device 100 in the pure fuel mode, and in the case that the current output power exceeds the current travel required power, control the fuel cell device 300 to charge the power battery device 200 at the same time.

[0067] It can be understood that the current travel required power and the current output power of the fuel cell device 300 are divided into the accelerator pedal pressing stage (power demand rapid rising stage), the accelerator pedal pressing stage (power demand fluctuation stage) and the accelerator pedal releasing stage (power demand rapid falling stage) in each accelerator control process. The current travel required power is different in different stages, and the current output power of the fuel cell device 300 can be responsive to the current travel required power in the early stage, and the current output power of the fuel cell device 300 can be responsive to the maximum output power of the fuel cell device 300 in the later stage if the maximum output power of the fuel cell device 300 is less than the current travel required power. It needs to be particularly pointed out that, Figures 5 to 8 The power supply and demand relationship in the above is a simplified drawing, and the power supply and demand should be fluctuating in the three stages.

[0068] Specifically, among the three stages of the current travel required power, the current output power of the fuel cell device 300 can be equal to the current travel required power in one of the stages, for example: if the maximum output power of the fuel cell device 300 is less than the current travel required power, the above-mentioned situation can occur in the power demand rapid falling stage of the current travel required power; or if the maximum output power of the fuel cell device 300 is equal to the current travel required power, the above-mentioned situation can occur in the power demand fluctuation stage of the current travel required power; or if the maximum output power of the fuel cell device 300 is greater than the current travel required power, the above-mentioned situation can occur in the power demand rapid rising stage or the power demand fluctuation stage of the current travel required power. In the case that the current output power of the fuel cell device 300 reaches the current travel required power, it proves that the power output of the fuel cell device 300 can meet the travel required, 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, and saving the power battery. In addition, after the current output power of the fuel cell device 300 reaches the current travel required power, the current output power of the fuel cell device 300 will inevitably exceed the current travel required power, at this time the output power of the fuel cell device 300 is surplus, and the surplus electric energy is supplied to the power battery device 200, so that the power battery can be supplied without external power supply, and the charging waiting time is saved.

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

[0070] In the case that the driving start instruction 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 to supply power to the electric drive device 100 in the parallel hybrid power supply mode according to the compensation power of the power battery device 200.

[0072] Specifically, after the current output power of the fuel cell device 300 is determined, the current driving required power can be compared with the current output power of the fuel cell device 300, specifically, the current driving required power minus the current output power of the fuel cell device 300, if the result is positive, it can be determined as the compensation power of the power battery device 200, so that the fuel cell device 300 supplies power according to the current output power and the power battery device 200 supplies power according to the compensation power in the parallel hybrid power supply mode at the same time, 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 an embodiment of the present application, in the case that the driving start instruction 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;

[0074] In the case that the driving start instruction 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 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 to the maximum output power of the fuel cell device 300 and the compensation power of the power battery device 200 is determined, wherein the second power threshold is less than the first power threshold;

[0075] In the case that the remaining power of the power battery device 200 does not reach the second power threshold after receiving the driving start instruction, 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 to the sum of the current driving required power and the set value and determine the compensation power of the power battery device 200, and 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 to the maximum output power of the fuel cell device 300 and determine the compensation power of the power battery device 200.

[0076] It can be understood that, after receiving the driving start instruction, the case that the remaining power of the power battery device 200 does not reach the first power threshold can also be subdivided. The case that the remaining power of the power battery device 200 does not reach the first power threshold is divided into the case that the remaining power of the power battery device 200 is within the power threshold range (i.e. between the second power threshold and the first power threshold) and the case that the remaining power of the power battery device 200 does not reach the second power threshold, so that the current output power response of the fuel cell device 300 can be further selected more appropriately according to the specific circumstances.

[0077] Specifically, in the case that 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, greater dynamic compensation can be met, and therefore even 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 only needs to be responded to the current driving required power, without excessive consumption of fuel in the fuel cell device 300, and of course before the current output power of the fuel cell device 300 reaches the current driving required power, the power battery device 200 needs to be compensated. The above case is set as the first driving condition, and the specific power supply and demand relationship of the first driving condition is as follows: Figure 5As shown, in the case that the current output power of the fuel cell device 300 is determined to respond to the current driving required power, when the current output power of the fuel cell device 300 is in the power demand rapid rising stage, since the current output power of the fuel cell device 300 cannot respond to the current driving required power, the power battery device 200 discharges to compensate 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 power demand fluctuation stage, since the current output power of the fuel cell device 300 can respond to the current driving required power, the power battery device 200 does not need to compensate the power, which belongs to the pure fuel mode. It needs to be specially pointed out that in this stage, the current driving required power is fluctuant, only the current output power of the fuel cell device 300 can respond to the current driving required power, and the pure fuel mode can be maintained until the accelerator is released, at this time, the current driving required power and the current output power of the fuel cell device 300 are both in the power demand rapid falling stage, the time of this stage is very short, but since the current output power of the fuel cell device 300 is always greater than the current driving required power, the fuel cell device 300 can charge the power battery device 200 in this stage.

[0078] In addition, when the current driving required power is greater than the maximum output power of the fuel cell device 300, in order to save the electric quantity of the power battery device 200, 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. The above case is set as the second driving condition, and the specific power demand relationship of the second driving condition is as follows: Figure 6As shown, in the case that the current output power of the fuel cell device 300 is determined to be the maximum output power in response to the fuel cell device 300, when the current output power of the fuel cell device 300 is in the process of the power demand rapid rise stage and the power demand fluctuation stage, since the current output power of the fuel cell device 300 in response is the maximum output power less than the current required power for driving, in order to meet the required power for driving, the power battery device 200 needs to be discharged in these two 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 required power for driving enters the power demand rapid decline stage and the current required power for driving decreases to be equal to the current output power of the fuel cell device 300, and then the mode is switched. However, the power demand rapid decline stage is very short. When the current required power for driving decreases to be equal to the current output power of the fuel cell device 300, that is, the current required power for 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 enter the power demand rapid decline stage, but also the power battery device 200 can be controlled to stop power supply, the fuel cell device 300 can supply power in the pure fuel mode, and since the subsequent current output power of the fuel cell device 300 is greater than the current required power for driving, the power battery device 200 can also be charged while supplying power in the pure fuel mode.

[0079] Specifically, in the case that the remaining power of the power battery device 200 does not reach the second power threshold, since the remaining power of the power battery device 200 is too low to meet the large dynamic compensation, when the current required power for 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 be in response to a power value greater than the current required power for driving. A set value can be preset in advance, that is, the current output power of the fuel cell device 300 is determined to be in response to the sum of the current required power for driving and the set value. Of course, the sum of the current required power for 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 quickly reach and exceed the current required power for driving, and the pure fuel mode and the charging of the power battery device 200 can be switched in advance. The above case is set as the third driving condition, and the specific power supply and demand relationship of the third driving condition is as follows: Figure 7As shown, in the case that the current output power of the fuel cell device 300 is determined in response to the sum of the current driving required power and the set value, the current output power of the fuel cell device 300 can reach the current driving required power in the power demand rapid rising stage, the current output power of the fuel cell device 300 has not reached the maximum output power at this moment, and the power battery device 200 can be controlled to stop discharging at this moment, and the parallel hybrid power supply mode is switched to the pure fuel mode, so that the discharging time of the power battery device 200 is obviously shortened. Since the current output power of the fuel cell device 300 continues to maintain an upward trend, the current output power of the fuel cell device 300 will immediately exceed the current driving required power, so that the fuel cell device 300 can be controlled to charge the power battery device 200 while switching to the pure fuel mode, and the pure fuel mode continues until the end of the power demand rapid falling stage of the fuel cell device 300.

[0080] In addition, in the case that the current driving required power 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 in response to the maximum output power of the fuel cell device 300. The above case is set as the fourth driving condition, and the specific power demand relationship of the fourth driving condition is as shown in the following table. Figure 8 As shown, in the case that the current output power of the fuel cell device 300 is determined in response to the maximum output power of the fuel cell device 300, the current driving required power reaches the current output power of the fuel cell device 300 only in the power demand rapid falling stage, and the current output power at this moment should be in the power demand fluctuation stage. At this moment, the parallel hybrid power supply mode can be switched to the pure fuel mode, and since the current output power of the fuel cell device 300 is greater than the current driving required power after this moment, the power battery device 200 can be charged while the pure fuel mode starts to supply power. More specifically, after the current driving required power decreases to the current output power of the fuel cell device 300, the fuel cell device 300 can be controlled to stop power output after the current output power in response to the maximum output power is maintained for a period of time, so as to supplement sufficient power to the power battery device 200.

[0081] It should be particularly pointed out that in the case that the difference between the current driving required power and the current output power is positive, the difference is determined as the compensation power of the power battery device 200.

[0082] In an embodiment of the present application, in the case that the residual power of the power battery device 200 does not reach the first power threshold, the control of the fuel cell device 300 to participate in the power supply of the electric drive device 100 and the charging of the power battery device 200 further comprises:

[0083] In the case that the boarding operation starting instruction is received and the residual 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 in the case that the boarding operation is in the stop gap, the fuel cell device 300 is continued to be controlled to charge the power battery device 200, wherein the second power threshold is less than the first power threshold;

[0084] In the case that the boarding operation starting instruction is received and the residual 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 supplied with power in the pure fuel mode before the residual power of the power battery device 200 enters the power threshold range, the fuel cell device 300 is continued to be controlled to supply power to the electric drive device 100 in the pure fuel mode and charge the power battery device 200 at the same time, and if the electric drive device 100 is supplied with power in the pure electric mode before the residual power of the power battery device 200 enters the power threshold range, the power battery device 200 is continued to be controlled to supply power to the electric drive device 100 in the pure electric mode.

[0085] Further, when the hybrid control system receives the boarding operation starting instruction, the boarding operation mode is controlled to enter, and the electric drive device 100 is switched to drive the boarding transmission device 500. Although the power required by the boarding operation is small, when the residual power of the power battery device 200 does not reach the second power threshold, the power battery device 200 cannot meet the requirement of the boarding operation due to the low power, and therefore the electric drive device 100 is supplied with power in the pure fuel mode, and in the case that the boarding operation is in the stop gap, the fuel cell device 300 can be controlled to charge the power battery device 200, and of course during the boarding operation, if the power required by the 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 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 vehicle 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 will continue 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 loading operation is in a pause, 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 vehicle loading operation can always be maintained at a certain value, that is, the set output power, specifically 30% to 50% of the maximum output power of the fuel cell device 300 .

[0088] Furthermore, when the vehicle operation start instruction is received and the remaining power of the power battery device 200 reaches the 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 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 source. 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 simultaneously supply power to the electric drive device 100;

[0092] If the power required for the boarding operation is equal to 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 the plug-in mode;

[0093] If the power required for the boarding 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 the plug-in mode while the on-board 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 boarding operation mode can also realize the plug-in mode by adding the on-board charging device 800, thereby saving the power of the power battery device 200 and shortening the charging waiting time. If the power required for the boarding 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 required power to ensure the normal operation of the boarding operation. If the power required for the boarding operation is less than the input power of the external power supply, the on-board charging device 800 is not only controlled to supply power to the electric drive device 100 in the plug-in mode, but also controlled to charge the power battery device 200 at the same time, thereby further shortening the charging waiting time.

[0095] In an embodiment of the present application, in the case where the remaining power of the power battery device 200 reaches the first power threshold, the control of the power battery device 200 to supply power to the electric drive device 100 in the pure electric mode includes:

[0096] In the case where the driving start instruction is received and the remaining power of the power battery device 200 reaches the first power threshold, the current driving required power is compared with the maximum output power of the power battery device 200;

[0097] If the current driving required power 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 the pure electric mode according to the current driving required power;

[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 the pure electric mode according to the maximum output power of the power battery device 200.

[0099] It can be understood that when the residual power of the power battery device 200 is above the first power threshold, even if the vehicle is driven in pure electric mode, the residual power can meet the demand, and the determination of the output power of the power battery device 200 does not need to consider the residual power of the power battery device 200, only the current driving required power needs to be compared with the maximum output power of the power battery device 200, thereby the design of the control logic can be made more simple. When the current driving required power is less than the maximum output power of the power battery device 200, the current driving required power is taken as the output power of the power battery device 200, thereby the normal operation of the driving can be ensured.

[0100] As shown in Figure 2 and Figure 3 In an embodiment of the present application, the electric drive device 100, the fuel cell device 300 and the power supply control device 400 are arranged on the lower car of the vehicle body, and the power battery device 200 is arranged on the upper car of the vehicle body and placed in the counterweight device 900. Since the fuel cell device 300 includes a fuel cell body 320, a storage device 310, related heat dissipation devices and related electrical elements, a larger space is required, and therefore it is more reasonable to arrange the fuel cell device 300 on the lower car with larger space and arrange the power battery device 200 on the upper car with smaller space, and the space of the lower car is also convenient for expanding the number and / or capacity of the storage device 310 (for example, the hydrogen storage bottle of the hydrogen fuel cell device 300), and the more the number and the larger the capacity, the longer the endurance mileage. In addition, placing the power battery device 200 in the counterweight device 900 not only plays a counterweight role, but also plays a protection role, which is a hit and a win. Specifically, the electrical connection between the power battery device 200 and the power supply control device 400 on the lower car can be guided to the lower car through the current collecting ring on the slewing device 700 of the engineering machinery.

[0101] In an embodiment of the present application, the counterweight device 900 includes a first counterweight 910 arranged on the turntable seat 710 of the upper car and a second counterweight 920 detachably connected with the first counterweight 910, and the first counterweight 910 and the second counterweight 920 are arranged in a stacked manner, the second counterweight 920 has an installation inner cavity with one side facing the first counterweight 910 and being arranged in an open manner, and the installation inner cavity can accommodate the power battery device 200. Arranging the counterweight device 900 as the first counterweight 910 and the second counterweight 920, and arranging the power battery device 200 on the second counterweight 920, so that when the power battery device 200 is replaced, only the second counterweight 920 needs to be detached, which can obviously reduce the labor intensity, and arranging the first counterweight 910 and the second counterweight 920 in a stacked manner makes the installation inner cavity of the second counterweight 920 not need to be additionally provided with a cover, and the installation inner cavity can be closed through the first counterweight 910.

[0102] Specifically, the first counterweight 910 is arranged at the lower side of the rotary table base 710, the second counterweight 920 is detachably hung at the lower end of the first counterweight 910 through a threaded connecting piece, and the power battery device 200 can also be fixed in the mounting inner cavity of the second counterweight 920 through a threaded connecting piece.

[0103] In addition, the application also provides an engineering machine, wherein the engineering machine comprises the hybrid power control system described above. Since the engineering machine adopts all the technical solutions of the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned 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 application, it should be understood that the terms "first", "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can be explicitly or implicitly included at least one of the features. In the description of the application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0105] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or in communication with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0106] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" 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 application. In the present application, the illustrative description of the above terms is not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples described in the present application and the features of the different embodiments or examples without contradiction.

[0107] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary and are not to be construed as limiting the present application, and that variations, modifications, substitutions and changes can be made by those skilled in the art without departing from the scope of the present application.

Claims

1. A hybrid control system characterized by, The hybrid control system comprises: An electric drive device (100) arranged on a vehicle body and drivingly connected with an upper vehicle transmission device (500) and a chassis transmission device (600) respectively; A power battery device (200) arranged on the vehicle body; A fuel cell device (300) arranged on the vehicle body; A power supply control device (400) electrically connected with the electric drive device (100), the power battery device (200) and the fuel cell device (300) respectively, and configured to: In a case where the residual power of the power battery device (200) reaches a first power threshold, control the power battery device (200) to supply power to the electric drive device (100) in a pure electric mode; In a case where the residual power of the power battery device (200) does not reach the first power threshold, control the fuel cell device (300) to participate in the power supply to the electric drive device (100) and the charging of the power battery device (200); The control of the fuel cell device (300) to participate in the power supply to the electric drive device (100) and the charging of the power battery device (200) in the case where the residual power of the power battery device (200) does not reach the first power threshold comprises: In a case where a driving start instruction is received and the residual power of the power battery device (200) does not reach the first power threshold, determine a compensation power of the power battery device (200) according to a current driving required power and a current output power of the fuel cell device (300), and control 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 according to the compensation power of the power battery device (200); In a case where the current output power of the fuel cell device (300) reaches the current driving required power, control the fuel cell device (300) to supply power to the electric drive device (100) in a pure fuel mode, and in a case where the current output power exceeds the current driving required power, simultaneously control the fuel cell device (300) to charge the power battery device (200); The determination of 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) in the case where the driving start instruction is received and the residual power of the power battery device (200) does not reach the first power threshold comprises: In a case where the driving start instruction is received and the residual power of the power battery device (200) is between a second power threshold and the first power threshold, if the current driving required power is less than a maximum output power of the fuel cell device (300), control the current output power of the fuel cell device (300) to respond to the current driving required power and determine the compensation power of the power battery device (200), and if the current driving required power is greater than the maximum output power of the fuel cell device (300), control the current output power of the fuel cell device (300) to respond to the maximum output power and determine the compensation power of the power battery device (200), wherein the second power threshold is less than the first power threshold. In the case that the driving start instruction is received and the residual power of the power battery device (200) does not reach 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 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, and 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 to the maximum output power, and the compensation power of the power battery device (200) is determined; The fuel cell device (300) and the power battery device (200) are controlled to supply power to the electric drive device (100) in the parallel hybrid power supply mode according to the compensation power of the power battery device (200).

2. The hybrid control system of claim 1, wherein The control of the fuel cell device (300) to participate in the power supply to the electric drive device (100) and the charging of the power battery device (200) in the case that the residual power of the power battery device (200) does not reach the first power threshold further comprises: In the case that the boarding operation start instruction is received and the residual 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, wherein the second power threshold is less than the first power threshold; In the case that the boarding operation start instruction is received and the residual 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 supplied with power in the pure fuel mode before the residual power of the power battery device (200) enters the power threshold range, the fuel cell device (300) is continued to be controlled to supply power to the electric drive device (100) in the pure fuel mode, and the power battery device (200) is charged at the same time, and if the electric drive device (100) is supplied with power in the pure electric mode before the residual power of the power battery device (200) enters the power threshold range, the power battery device (200) is continued to be controlled to supply power to the electric drive device (100) in the pure electric mode.

3. The hybrid control system of claim 1, wherein The hybrid power control system further comprises a vehicle-mounted charging device (800) electrically connected with the power supply control device (400), the vehicle-mounted charging device (800) can be externally connected with a power source, and the power supply control device (400) is further configured to: In the case that the boarding operation start instruction is received and the vehicle-mounted charging device (800) is externally connected with a power source, the boarding operation required power and the external power source input power are compared; If the boarding operation required power is greater than the external power source input power, the power battery device (200) and the vehicle-mounted charging device (800) are controlled to supply power to the electric drive device (100) at the same time; If the boarding operation required power is equal to the external power source input power, the vehicle-mounted charging device (800) is controlled to supply power to the electric drive device (100) in the plug-in mode; If the boarding operation required power is equal to the external power source input power, the vehicle-mounted charging device (800) is controlled to supply power to the electric drive device (100) in the plug-in mode; If the power required by the boarding operation is less than the input power of the external power supply, the on-board charging device (800) is controlled to charge the power battery device (200) while the on-board charging device (800) is controlled to supply power to the electric drive device (100) in the plug-in mode.

4. The hybrid control system according to any one of claims 1 to 3, characterized by, The control of the power battery device (200) to supply power to the electric drive device (100) in the pure electric mode when the residual power of the power battery device (200) reaches the first power threshold comprises: In the case that the driving start instruction is received and the residual power of the power battery device (200) reaches the first power threshold, the current driving required power is compared with the maximum output power of the power battery device (200); If the current driving required power 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 the pure electric mode according to the current driving required power; 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 the pure electric mode according to the maximum output power of the power battery device (200).

5. The hybrid control system according to any one of claims 1 to 3, characterized by, The electric drive device (100), the fuel cell device (300) and the power supply control device (400) are arranged on the lower car of the vehicle body, and the power battery device (200) is arranged on the upper car of the vehicle body and placed in the counterweight device (900).

6. The hybrid control system of claim 5, wherein, The counterweight device (900) comprises a first counterweight (910) arranged on a rotating table seat (710) of the upper car and a second counterweight (920) detachably connected with the first counterweight (910), and the first counterweight (910) and the second counterweight (920) are arranged in a stacked manner, the second counterweight (920) has an installation inner cavity arranged in an open manner on one side facing the first counterweight (910), and the installation inner cavity can accommodate the power battery device (200).

7. A working machine, characterized in that The engineering machinery comprises the hybrid power control system according to any one of claims 1 to 6.

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