Energy control method, system and work machine

Abstract

The present invention relates to the technical field of hybrid working machinery, and provides an energy control method, a system and a working machinery. The method is applied to a working machinery power architecture composed of an engine, a first clutch, a motor, a motor controller, a transmission mechanism and a power battery, and includes: when the first clutch is closed, controlling the output power of the engine to match the required power of the transmission mechanism and the first required power of the motor; when the first clutch is disengaged, controlling the output power of the power battery to match the required power of the electrical load and the second required power of the motor. The present invention is used to solve or improve the defect in the prior art that the energy efficiency of the engine is reduced due to the reasonable distribution of energy of the working machinery in the hybrid mode by adjusting the power of the range extender. By adopting a power parallel architecture, the engine directly outputs power, thereby improving the energy efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of hybrid working machinery, and in particular to an energy control method, system and working machinery. Background Art

[0002] With the maturity of electrification technology, the current demand for more low-carbon and environmentally friendly electric or hybrid working machinery has gradually emerged.

[0003] Based on the working characteristics that many working machinery need to continuously construct, hybrid working machinery can not only effectively solve the endurance problem of pure electric working machinery, but also be more environmentally friendly than pure fuel working machinery. Therefore, how to achieve fuel saving and low emissions of hybrid working machinery has always been the key research direction for hybrid working machinery.

[0004] However, current hybrid working machinery generally realizes the reasonable distribution of energy among the power battery, the range extender and the electrical equipment by setting a range extender and then adjusting the power of the range extender in the hybrid mode. On the one hand, since the engine does not directly participate in power output, energy is converted twice, resulting in a reduction in energy efficiency. On the other hand, since it is necessary to adjust the motor power in real time to match the engine working conditions based on the vehicle function requirements, the computing power requirement is high. Summary of the Invention

[0005] The present invention provides an energy control method, system and working machinery, which are used to solve or improve the defect of reduced engine energy efficiency caused by adjusting the power of the range extender to achieve reasonable energy distribution of the working machinery in the hybrid mode in the prior art. By adopting a power parallel architecture, the engine directly outputs power, improving the energy efficiency.

[0006] The present invention provides an energy control method, which is applied to a working machinery power architecture composed of an engine, a first clutch, a motor, a motor controller, a transmission mechanism and a power battery. The engine is connected to the motor through the first clutch, the motor is connected to the transmission mechanism, and the power battery is connected to the motor through the motor controller. Wherein, the energy control method includes:

[0007] Obtain the first switch state of the first clutch;

[0008] When the first switch state is closed, execute a first energy control strategy on the working machinery;

[0009] When the first switch state is disengaged, execute a second energy control strategy on the working machinery;

[0010] Wherein, the first energy control strategy includes: controlling the output power of the engine to match the required power of the transmission mechanism and the first required power of the motor, the first required power of the motor being used to drive the electrical load of the working machine and / or charge the power battery, and the initial value of the first required power of the motor being determined based on the difference between the preset optimal fuel consumption power of the engine and the theoretical required power of the working machine, the theoretical required power being determined based on the current working condition of the working machine and the preset required powers of the various working mechanisms of the working machine;

[0011] The second energy control strategy includes: controlling the output power of the power battery to match the required power of the electrical load and the second required power of the motor, the second required power of the motor being used to drive the transmission mechanism.

[0012] According to the energy control method of the present invention, the first energy control strategy further includes:

[0013] Determining whether the output power of the engine meets a first preset standard, the first preset standard being that the ratio of the output power of the engine to the preset maximum power of the engine is less than or equal to a preset threshold;

[0014] When it is determined that the output power of the engine does not meet the first preset standard, reducing the first required power of the motor until the output power of the engine meets the first preset standard.

[0015] According to the energy control method of the present invention, the first energy control strategy further includes:

[0016] Determining whether the first required power of the motor meets a second preset standard, the second preset standard being that the charging power provided by the motor to the power battery is less than the preset allowable charging power of the power battery;

[0017] When it is determined that the first required power of the motor does not meet the second preset standard, reducing the first required power of the motor until the charging power provided by the motor to the power battery is less than the preset allowable charging power of the power battery.

[0018] According to the energy control method of the present invention, the first energy control strategy further includes:

[0019] Obtaining the remaining power of the power battery;

[0020] When the remaining power is greater than a preset power upper limit, sending a first control adjustment request signal and determining whether a first confirmation adjustment signal in response to the first control adjustment request signal is received;

[0021] If the first confirmation adjustment signal is received, the second energy control strategy is executed on the work machine;

[0022] If the first confirmation adjustment signal is not received, control the power generated by the motor to match the power demand of the electrical load of the work machine, and the output power of the engine to match the demand power of the transmission mechanism and the third demand power of the motor, where the third demand power of the motor is the power required for the motor to generate electricity.

[0023] According to the energy control method of the present invention, the second energy control strategy further includes:

[0024] Obtain the remaining power of the power battery;

[0025] When the remaining power is less than the lower limit of the first preset power, send a second control adjustment request signal, and determine whether a second confirmation adjustment signal in response to the second control adjustment request signal is received;

[0026] If the second confirmation adjustment signal is received, execute the first energy control strategy on the work machine;

[0027] If the second confirmation adjustment signal is not received, continuously monitor the remaining power, and when it is determined that the remaining power is less than the lower limit of the second preset power, control the work machine to stop operating.

[0028] The present invention also provides an energy control method, which is applied to a work machine power architecture composed of an engine, a first motor, a first motor controller, a second clutch, a second motor, a second motor controller, a transmission mechanism, and a power battery. The engine is connected to the first motor, the first motor is connected to the second motor through the second clutch, the second motor is connected to the transmission mechanism, and the power battery is connected to the first motor and the second motor through the first motor controller and the second motor controller respectively. Wherein, the energy control method includes:

[0029] Obtain the second switch state of the second clutch;

[0030] When the second switch state is closed, execute the third energy control strategy on the work machine;

[0031] When the second switch state is separated, execute the fourth energy control strategy on the work machine;

[0032] Among them, the third energy control strategy includes: when the actual required power of the working mechanism of the working machine is less than the preset optimal fuel consumption power of the engine, controlling the output power of the engine to match the first required power of the transmission mechanism and the first motor, stopping the second motor from doing work, and the first required power of the first motor is used to drive the electrical load of the working machine and / or charge the power battery; or, when the actual required power of the working mechanism is greater than or equal to the preset optimal fuel consumption power, controlling the first motor to stop generating electricity, and the output powers of the engine and the power battery match the required powers of the transmission mechanism and the electrical load, and the output power of the power battery is equal to the difference between the actual required power and the preset optimal fuel consumption power;

[0033] The fourth energy control strategy includes: controlling the output power of the power battery to match the required power of the electrical load and the required power of the second motor, and the required power of the second motor is used to drive the transmission mechanism.

[0034] According to the energy control method of the present invention, the third energy control strategy further includes:

[0035] Obtain the remaining power of the power battery;

[0036] When the remaining power is greater than the first preset power upper limit, send a control adjustment request signal and determine whether an acknowledgment adjustment signal in response to the control adjustment request signal is received;

[0037] If the acknowledgment adjustment signal is received, execute the fourth energy control strategy on the working machine;

[0038] If the acknowledgment adjustment signal is not received, when the remaining power is greater than the second preset power upper limit, control the power generated by the first motor to match the power requirement of the electrical load, and the output power of the engine matches the required power of the transmission mechanism and the second required power of the first motor, and the second required power of the first motor is the power required for the first motor to generate electricity.

[0039] According to the energy control method of the present invention, the third energy control strategy further includes:

[0040] When the remaining power is less than the third preset power lower limit, send a charging request signal and determine whether an acknowledgment charging signal in response to the charging request signal is received;

[0041] If the acknowledgment charging signal is received, control the working machine to stop working and wait for charging;

[0042] If the confirmation charging signal is not received, when the remaining power is less than the lower limit of the fourth preset power, control the construction machinery to stop working.

[0043] The present invention also provides an energy control system, which is applied to a construction machinery power architecture composed of an engine, a first clutch, an electric motor, a motor controller, a transmission mechanism, and a power battery. The engine is connected to the electric motor through the first clutch, the electric motor is connected to the transmission mechanism, and the power battery is connected to the electric motor through the motor controller. Wherein, the energy control system includes:

[0044] A first state acquisition module, configured to acquire a first switch state of the first clutch;

[0045] A first strategy execution module, configured to execute a first energy control strategy on the construction machinery when the first switch state is closed; or execute a second energy control strategy on the construction machinery when the first switch state is separated;

[0046] Wherein, the first energy control strategy includes: controlling the output power of the engine to match the demand power of the transmission mechanism and the first demand power of the electric motor. The first demand power of the electric motor is used to drive the electrical load of the construction machinery and / or charge the power battery, and the initial value of the first demand power of the electric motor is determined based on the difference between the preset optimal fuel consumption power of the engine and the theoretical demand power of the construction machinery. The theoretical demand power is determined based on the current working condition of the construction machinery and the preset demand power of each working mechanism of the construction machinery;

[0047] The second energy control strategy includes: controlling the output power of the power battery to match the demand power of the electrical load and the second demand power of the electric motor. The second demand power of the electric motor is used to drive the transmission mechanism.

[0048] The present invention also provides another energy control system, which is applied to a construction machinery power architecture composed of an engine, a first electric motor, a first motor controller, a second clutch, a second electric motor, a second motor controller, a transmission mechanism, and a power battery. The engine is connected to the first electric motor, the first electric motor is connected to the second electric motor through the second clutch, the second electric motor is connected to the transmission mechanism, and the power battery is connected to the first electric motor and the second electric motor through the first motor controller and the second motor controller respectively. Wherein, the energy control system includes:

[0049] A second state acquisition module, configured to acquire a second switch state of the second clutch;

[0050] The second strategy execution module is configured to execute a third energy control strategy for the work machine when the second switch state is closed; or execute a fourth energy control strategy for the work machine when the second switch state is open;

[0051] Wherein, the third energy control strategy includes: when the actual required power of the working mechanism of the work machine is less than the preset optimal fuel consumption power of the engine, controlling the output power of the engine to match the first required power of the transmission mechanism and the first motor, the second motor stops working, and the first required power of the first motor is used to drive the electrical load of the work machine and / or charge the power battery; or when the actual required power of the working mechanism is greater than or equal to the preset optimal fuel consumption power, controlling the first motor to stop generating electricity, and the output powers of the engine and the power battery match the required powers of the transmission mechanism and the electrical load, and the output power of the power battery is equal to the difference between the actual required power and the preset optimal fuel consumption power;

[0052] The fourth energy control strategy includes: controlling the output power of the power battery to match the required power of the electrical load and the required power of the second motor, and the required power of the second motor is used to drive the transmission mechanism.

[0053] The present invention also provides a work machine including the energy control system as described in any one of the above.

[0054] An energy control method, system and work machine provided by the present invention connect the engine to the motor through a clutch, the motor is then connected to the transmission mechanism for driving the working mechanism, and then the power battery is connected to the motor through the motor controller, forming a power parallel architecture of the power battery and the engine, enabling the engine to directly participate in power output, avoiding secondary energy conversion, and effectively improving energy utilization. At the same time, when the clutch is closed, the output power of the engine is controlled to drive the transmission mechanism, and the power output from the engine to the motor is determined by the difference between the preset optimal fuel consumption power of the engine and the theoretical required power of the work machine, and the theoretical required power of the work machine is determined based on the current working condition of the work machine and the preset required powers of the various working mechanisms of the work machine, thereby effectively reducing the real-time operation requirements and facilitating the real-time matching of the motor power and the engine working condition. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0056] Figure 1 It is a schematic diagram of the power structure of a working machine to which the energy control method provided by an embodiment of the present invention is applied;

[0057] Figure 2 It is a schematic flowchart of an energy control method provided by an embodiment of the present invention;

[0058] Figure 3 It is a schematic diagram of the power structure of a working machine to which another energy control method provided by an embodiment of the present invention is applied;

[0059] Figure 4 It is a schematic flowchart of another energy control method provided by an embodiment of the present invention;

[0060] Figure 5 It is a schematic diagram of the control system architecture of a working machine to which the energy control method provided by an embodiment of the present invention is applied;

[0061] Figure 6 It is a schematic diagram of the structure of an energy control system provided by an embodiment of the present invention;

[0062] Figure 7 It is a schematic diagram of the structure of another energy control system provided by an embodiment of the present invention;

[0063] Figure 8 It is a schematic diagram of the structure of an electronic device provided by the present invention;

[0064] Reference numerals:

[0065] 1: Engine; 2: First clutch; 3: Motor; 4: Motor controller; 5: Transmission mechanism; 6: Power battery; 7: Working mechanism; 8: Electrical load; 9: First motor; 10: First motor controller; 11: Second clutch; 12: Second motor; 13: Second motor controller. Detailed implementation manners

[0066] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings in the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without creative efforts shall fall within the protection scope of the present invention.

[0067] The following combines Figure 1 and Figure 2 to describe an energy control method of the present invention, and the method is applied to as Figure 1The working machine power architecture shown, which consists of an engine 1, a first clutch 2, a motor 3, a motor controller 4, a transmission mechanism 5, and a power battery 6. The engine 1 is connected to the motor 3 through the first clutch 2. The motor 3 is connected to the transmission mechanism 5. The power battery 6 is connected to the motor 3 through the motor controller 4. The transmission mechanism 5 and the power battery 6 are respectively connected to a working mechanism 7 and an electrical load 8.

[0068] It can be understood that the transmission mechanism can be a gearbox, a transfer case, etc., which can achieve multiple power couplings. The working mechanism can be a hydraulic pump, a sprocket, a wheel hub, etc.

[0069] From Figure 1 it can be seen that when the clutch is closed, the motor can be in a power generation state, both the engine and the power battery can output energy, and if the engine power meets the energy requirements of the entire working machine, the engine can be used as the sole energy source for the working machine. When the clutch is disengaged, the engine will be in a shutdown or idle state. At this time, the power battery can be used as the sole energy source for the working machine. Therefore, Figure 1 the working machine power architecture shown constitutes a power parallel architecture.

[0070] The energy control method provided by the embodiments of the present invention is executed based on the vehicle control unit (VCU) of the working machine. As Figure 2 shown, it specifically includes the following steps:

[0071] 101. Obtain the first switch state of the first clutch;

[0072] It can be understood that from Figure 1 the working machine power architecture, the first switch state of the first clutch determines the energy source of the working machine. Therefore, when the VCU executes energy control, it first needs to obtain the first switch state of the first clutch.

[0073] 102. When the first switch state is closed, execute a first energy control strategy on the working machine;

[0074] Specifically, the first energy control strategy includes: controlling the output power of the engine to match the required power of the transmission mechanism and the first required power of the motor. That is, when the clutch is closed, the working machine fully relies on the output power of the engine to perform operations, thereby avoiding power consumption of the power battery.

[0075] More specifically, the electrical load can also be called the motor load, that is, the load on the working machine that needs to be driven by current. In the first energy control strategy, a part of the energy output by the engine is used to drive the working mechanism through the transmission mechanism, and the other part is output to the motor, so that the motor converts the mechanical energy of the engine into electrical energy to drive the electrical load and / or charge the power battery.

[0076] It is understandable that after the output power of the engine is used for the transmission mechanism, when the remaining power matches the power required by the motor, that is, Pe=Pa+Pm, where Pe is the engine power, Pa is the actual required power of the operating mechanism, and Pm is the motor power, a reasonable distribution of the engine energy can be achieved. Therefore, it is necessary to determine the required power of the motor according to the operating conditions of the operating machine.

[0077] It should be noted that in the energy control method provided in the embodiment of the present invention, by pre-setting the preset required power of each operating mechanism of the operating machine, and then determining the operating mechanism in operation based on the current working condition of the operating machine, the theoretical required power P of the operating machine under the current working condition can be quickly determined. Then, the initial power value that can be allocated to the motor can be obtained by subtracting the theoretical required power required by the operating machine under the current working condition from the optimal fuel consumption power of the engine, that is, Pm=Peb-P, thereby effectively reducing the real-time calculation requirements.

[0078] Furthermore, after the engine model is determined, the engine's optimal fuel consumption power Peb is a known quantity, and the preset required power of each operating mechanism can be obtained by capturing the actual power required by each operating mechanism of a large number of operating machines during previous operations, and then calculating the average value. For example, taking a hybrid paver as an example, the power required by the operating mechanisms such as vibrating, feeding, vibration, and oil cylinder of the paver during operation can be captured, and then the theoretical required power of each operating mechanism under different operating conditions can be calibrated, and the theoretical operating required power of the paver under different operating conditions can be further obtained.

[0079] Furthermore, in order to improve the accuracy of the theoretical operating power requirements, the power of each operating mechanism for different working conditions can be subdivided. For example, the power required for vibration P1 can be further subdivided into the power required for vibration under asphalt conditions P1a, the power required for vibration under water-stable conditions P1b, etc.

[0080] Therefore, the initial value of the first required power of the motor is determined by the difference between the preset optimal fuel consumption power of the engine and the theoretical required power of the working machinery, which not only satisfies the reasonable distribution of the output power of the engine, but also reduces the computing power requirements and improves the efficiency of determining the power value.

[0081] Furthermore, it is understandable that in order to ensure that the engine does not stall due to overload when the operating machinery relies entirely on the engine to do work, when selecting the engine for the operating machinery, it is necessary to meet the requirement that Peb is not less than the theoretical operating power requirement P of the operating machinery, thereby ensuring the fuel-saving and low-emission effects of the operating machinery when it relies entirely on the engine to do work.

[0082] 103. When the first switch state is separated, execute a second energy control strategy for the construction machine;

[0083] Specifically, the second energy control strategy includes: controlling the output power of the power battery to match the required power of the electrical load and the second required power of the motor, and the second required power of the motor is used to drive the transmission mechanism.

[0084] It can be understood that when the first clutch is separated, the engine is in a shutdown or idle state and does not participate in energy output. At this time, the power battery is the energy source of the construction machine, that is, the motor is in a working state, and the VCU only needs to control the motor power Pm to be equal to the actual required power Pa of the construction machine.

[0085] The energy control method provided by the embodiment of the present invention is applied to a power parallel construction machine power architecture composed of an engine, a first clutch, a motor, a motor controller, a transmission mechanism, and a power battery, realizing reasonable distribution of the energy output by the engine or the power battery, avoiding additional hardware costs, and improving the fault tolerance rate of the control system of the construction machine. At the same time, through the preset required power of each working mechanism of the construction machine determined based on big data, the initial value of the current required power of the motor is quickly and accurately determined, thereby reducing the real-time operation requirements and improving the energy control efficiency.

[0086] Based on the content of the above embodiment, the first energy control strategy further includes:

[0087] Determine whether the output power of the engine meets a first preset standard, where the first preset standard is that the ratio of the output power of the engine to the preset maximum power of the engine is less than or equal to a preset threshold;

[0088] When it is determined that the output power of the engine does not meet the first preset standard, reduce the first required power of the motor until the output power of the engine meets the first preset standard.

[0089] It can be understood that by determining in real time whether the ratio of the output power of the engine to the preset maximum power of the engine is less than or equal to the preset threshold, and reducing the first required power of the motor when the ratio of the output power of the engine to the preset maximum power of the engine is greater than the preset threshold, it is possible to ensure that the engine does not stall due to a sudden increase in the operating load during the actual operation, thereby ensuring the stability and reliability of the operation of the construction machine.

[0090] It should be noted that after the engine model is determined, the preset maximum power of the engine is a known value, and the preset threshold can be flexibly set according to experience or actual use requirements. For example, the preset threshold is set to 90%, and then the VCU can use the following formula (1) to determine whether the output power of the engine meets the first preset standard:

[0091] (Pm + Pa) / Pemax ≤ 90% (1)

[0092] Based on the content of the above embodiments, the first energy control strategy further includes:

[0093] Determine whether the first required power of the motor meets the second preset standard, where the second preset standard is that the charging power provided by the motor to the power battery is less than the preset allowable charging power of the power battery;

[0094] When it is determined that the first required power of the motor does not meet the second preset standard, reduce the first required power of the motor until the charging power provided by the motor to the power battery is less than the preset allowable charging power of the power battery.

[0095] It can be understood that the preset allowable charging power Pc of the power battery refers to the maximum power that can ensure the safe charging of the power battery. Therefore, when the charging power provided by the motor to the power battery (Pm - Pel, where Pel is the power used by the motor to drive the electrical load) is greater than the preset allowable charging power of the power battery, it may cause damage or safety risks to the power battery.

[0096] Specifically, by the VCU determining in real time whether the charging power provided by the motor to the power battery is less than the preset allowable charging power of the power battery, and reducing the motor power when the charging power provided to the power battery is greater than or equal to the preset allowable charging power, the safety of the working machine can be improved.

[0097] Based on the content of the above embodiments, the first energy control strategy further includes:

[0098] Obtain the remaining power of the power battery;

[0099] When the remaining power is greater than the preset power upper limit, send a first control adjustment request signal, and determine whether a first confirmation adjustment signal in response to the first control adjustment request signal is received;

[0100] If the first confirmation adjustment signal is received, execute the second energy control strategy on the working machine;

[0101] If the first confirmation adjustment signal is not received, control the power generated by the motor to match the power demand of the electrical load of the work machine, and the output power of the engine to match the demand power of the transmission mechanism and the third demand power of the motor, where the third demand power of the motor is the power required for the motor to generate electricity.

[0102] It can be understood that when the remaining power of the power battery is greater than the preset upper limit of the power, it means that the power battery is in a high SOC state. At this time, charging needs to be restricted to avoid overcharging the battery and causing damage to the power battery.

[0103] Specifically, for example, when the SOC > 90%, the VCU can send a first control adjustment request signal, such as displaying the request signal on the touch screen of the work machine's cockpit. Then, after the user confirms the request on the touch screen, the first confirmation adjustment signal is received, thereby controlling the implementation of the second energy control strategy for the work machine, that is, controlling the clutch to disengage and maintaining the normal operation of the work machine by outputting energy from the power battery. When the first confirmation adjustment signal is not received, that is, when the user does not operate, the power generated by controlling the motor is matched to the power demand of the electrical load of the work machine, and the output power of the engine is matched to the demand power of the transmission mechanism and the power required for the motor to generate electricity, that is, the motor dynamically matches the same power generation power according to the electrical load demand (Pel = Pm), thereby preventing the power battery from continuing to charge.

[0104] Furthermore, when the SOC of the power battery is greater than the currently set preset upper limit of the power, such as 90% mentioned above, or a preset upper limit greater than the currently set one, such as 92% or 95%, a control instruction can be sent to the battery management system BMS of the power battery to make the BMS limit the charging power provided for the power battery, thereby further preventing the occurrence of overcharging of the power battery and improving the use safety of the work machine.

[0105] Based on the content of the above embodiments, the second energy control strategy further includes:

[0106] Obtain the remaining power of the power battery;

[0107] When the remaining power is less than the first preset lower limit of the power, send a second control adjustment request signal and determine whether a second confirmation adjustment signal in response to the second control adjustment request signal is received;

[0108] If the second confirmation adjustment signal is received, execute the first energy control strategy for the work machine;

[0109] If the second confirmation adjustment signal is not received, continuously monitor the remaining power, and when it is determined that the remaining power is less than the second preset lower limit of the power, control the work machine to stop operating.

[0110] It can be understood that in the second energy control strategy, the energy required by the work machine comes from the power battery. When the SOC of the power battery continuously decreases and reaches a certain limit value, it will not only affect the service life of the power battery, but also affect the normal operation of the work machine.

[0111] Specifically, when the remaining power of the power battery is less than the first preset power lower limit, for example, 20%, a second control adjustment request signal is sent through the VCU, such as displaying the request signal on the touch screen of the work machine's cockpit. Then, after the user confirms the request on the touch screen, a second confirmation adjustment signal is received, thereby controlling the implementation of the first energy control strategy for the work machine, that is, controlling the clutch to close and keeping the work machine operating normally by the engine outputting energy. When the second confirmation adjustment signal is not received, that is, when the user does not operate, the remaining power of the power battery is continuously monitored, and when the remaining power of the power battery is less than the second preset power lower limit, for example, 10%, the work machine is controlled to stop operating, which can avoid further consumption of the power battery and at the same time keep the basic actions and moving functions of the work machine to facilitate the user to operate the work machine for charging, etc.

[0112] The following combines Figure 3 and Figure 4 to describe another energy control method of the present invention. The method is applied to a work machine power architecture composed of an engine 1, a first motor 9, a first motor controller 10, a second clutch 11, a second motor 12, a second motor controller 13, a transmission mechanism 5, and a power battery 6 as shown in Figure 3 The engine 1 is connected to the first motor 9, the first motor 9 is connected to the second motor 12 through the second clutch 11, the second motor 12 is connected to the transmission mechanism 5, the power battery 6 is respectively connected to the first motor 9 and the second motor 12 through the first motor controller 10 and the second motor controller 13, and the transmission mechanism 5 and the power battery 6 are respectively connected to the working mechanism 7 and the electrical load 8.

[0113] It can be understood that the transmission mechanism can be mechanisms such as a gearbox and a transfer case, which can achieve multiple power couplings. The working mechanism can be a hydraulic pump, a sprocket, a wheel hub, etc.

[0114] by Figure 3It can be known that when the second clutch is closed, the first motor can be in the power generation state and the second motor can be in the power working state. Both the engine and the power battery can output energy. And when the power of the engine can meet the power demand of the working mechanism, the second motor can be stopped from working, and part of the mechanical energy generated by the engine can be converted into electrical energy by the first motor to drive the electrical load, thus avoiding the power consumption of the power battery. When the second clutch is disengaged, the engine will be in the shutdown or idle state, and the power battery can be used as the entire energy source of the working machine. Therefore, Figure 3 The power architecture of the working machine shown also constitutes a power parallel architecture.

[0115] The energy control method provided by the embodiment of the present invention is executed based on the vehicle control unit (VCU) of the working machine. As Figure 4 shown, it specifically includes the following steps:

[0116] 201. Obtain the second switch state of the second clutch;

[0117] It can be understood that from Figure 3 the power architecture of the working machine, the second switch state of the second clutch determines the energy source of the working machine. Therefore, when the VCU executes energy control, it first needs to obtain the second switch state of the second clutch.

[0118] 202. When the second switch state is closed, execute the third energy control strategy on the working machine;

[0119] Specifically, the third energy control strategy includes: when the actual required power of the working mechanism of the working machine is less than the preset best fuel consumption power of the engine, that is, Pa < Peb, control the output power of the engine to match the first required power of the transmission mechanism and the first motor, and the second motor stops running, that is, the second motor stops working, Pm1 = Peb - Pa. The energy output by the engine can be converted into electrical energy by the first motor to drive the electrical load and / or charge the power battery, avoiding the power consumption of the power battery. When Pa > Peb, control the first motor to stop generating electricity, and the output powers of the engine and the power battery match the required powers of the transmission mechanism and the electrical load, so as to realize the joint output of energy by the engine and the power battery to ensure the operation of the working machine. At the same time, it can ensure that the energy output by the engine is completely used for the transmission mechanism, reducing the power consumption of the power battery.

[0120] It can be understood that the VCU can deduce Pa through the load rate fed back by the engine.

[0121] More specifically, by controlling the output power of the power battery through the VCU to be equal to the difference between the actual demand power and the preset optimal fuel consumption power, that is, Pm2 = Pa – Peb, it can ensure that the engine operates at the optimal fuel consumption power and at the same time realize the power coupling of the second motor according to the working conditions.

[0122] 203. When the second switch state is separated, execute the fourth energy control strategy on the construction machine;

[0123] Among them, the fourth energy control strategy includes: controlling the output power of the power battery to match the demand power of the electrical load and the demand power of the second motor, and the demand power of the second motor is used to drive the transmission mechanism.

[0124] It can be understood that when the second clutch is separated, the engine is in a shutdown or idle state and does not participate in energy output. At this time, the power battery is the energy source of the construction machine, that is, the second motor is in a working state, and the VCU only needs to control the motor power Pm to be equal to the actual demand power Pa of the construction machine.

[0125] It should be noted that based on the Figure 3 shown construction machine power architecture, the cooperative operation of the engine and the power battery can be realized. Therefore, in order to improve the utilization rate of the energy output by the engine, that is, to ensure that the energy output by the engine is as completely used for the operation of the construction machine as possible, when selecting the engine for the construction machine, Peb should be not less than the theoretical operation demand power P of the construction machine and as close to P as possible, so as to reduce the loss of the energy output by the engine and achieve the fuel-saving and low-emission effects of the construction machine.

[0126] The energy control method provided by the embodiment of the present invention, by applying to the power parallel construction machine power architecture composed of an engine, a first motor, a first motor controller, a second clutch, a second motor, a second motor controller, a transmission mechanism and a power battery, realizes the reasonable distribution of the energy output by the engine or the power battery, also avoids additional hardware costs, and improves the fault tolerance rate of the control system of the construction machine. At the same time, through the setting of two motors, the power of the engine of the construction machine can be relatively small, thereby further reducing the hardware cost of the construction machine.

[0127] Based on the content of the above embodiment, the third energy control strategy further includes:

[0128] Obtain the remaining power of the power battery;

[0129] When the remaining power is greater than the first preset power upper limit, send a control adjustment request signal and determine whether an acknowledgment adjustment signal in response to the control adjustment request signal is received;

[0130] If the confirmation adjustment signal is received, the fourth energy control strategy is executed on the work machine;

[0131] If the confirmation adjustment signal is not received, when the remaining power is greater than the second preset power upper limit, control the power generated by the first motor to match the power demand of the electrical load, and the output power of the engine to match the demand power of the transmission mechanism and the second demand power of the first motor, where the second demand power of the first motor is the power required for the first motor to generate electricity.

[0132] Specifically, taking the first preset power upper limit of 90% as an example, the VCU can send a control adjustment request signal when the SOC > 90%, such as displaying the request signal on the touch screen of the work machine's cockpit, and then receive the confirmation adjustment signal after the user confirms the request on the touch screen, so as to control the execution of the fourth energy control strategy on the work machine, that is, control the clutch to disengage, and keep the work machine operating normally by outputting energy from the power battery. When the confirmation adjustment signal is not received, that is, when the user does not operate, when the remaining power of the power battery is greater than the second preset power upper limit, such as 95%, control the power generated by the first motor to match the power demand of the electrical load, and the output power of the engine to match the demand power of the transmission mechanism and the power required for the first motor to generate electricity, that is, make the motor dynamically match the same power generation power according to the electrical load demand (Pel = Pm1), thus avoiding continuous charging of the power battery.

[0133] Based on the content of the above embodiments, the third energy control strategy further includes:

[0134] When the remaining power is less than the third preset power lower limit, send a charging request signal and determine whether a confirmation charging signal in response to the charging request signal is received;

[0135] If the confirmation charging signal is received, control the work machine to stop operating and wait for charging;

[0136] If the confirmation charging signal is not received, when the remaining power is less than the fourth preset power lower limit, control the work machine to stop operating.

[0137] Specifically, the third preset power lower limit can be set as needed. For example, it is set to 10%, that is, when the SOC of the power battery < 10%, a charging request signal is sent, that is, a request to stop operating and charge. If the user does not operate, when the remaining power is less than the fourth preset power lower limit, such as when the SOC < 5%, the VCU controls the work machine to stop the operating function, and only retains the basic actions and moving functions to facilitate the user to operate the work machine for charging.

[0138] Optionally, the fourth energy control measurement may further include: when the remaining power is less than the lower limit of the fifth preset power, sending a control adjustment request signal and determining whether an acknowledgment adjustment signal in response to the control adjustment request signal is received; if the corresponding acknowledgment adjustment signal is received, performing a third energy control strategy on the work machine; and if the corresponding acknowledgment adjustment signal is not received, continuously monitoring the remaining power of the power battery, and when it is determined that the remaining power is less than the lower limit of the sixth preset power, controlling the work machine to stop working.

[0139] It can be understood that in the fourth energy control strategy, the energy required by the work machine comes from the power battery. When the SOC of the power battery continuously decreases and reaches a certain limit, it will not only affect the service life of the power battery, but also affect the normal operation of the work machine.

[0140] Specifically, when the remaining power of the power battery is less than the lower limit of the fifth preset power, for example, 20%, a control adjustment request signal is sent through the VCU, such as displaying the request signal on the touch screen of the work machine's cockpit, and then after the user confirms the request on the touch screen, an acknowledgment adjustment signal is received, thereby controlling the execution of the third energy control strategy on the work machine, that is, controlling the clutch to close and maintaining the normal operation of the work machine by the engine output energy. When the acknowledgment adjustment signal is not received, that is, when the user does not operate, the remaining power of the power battery is continuously monitored, and when the remaining power of the power battery is less than the lower limit of the sixth preset power, for example, 10%, the work machine is controlled to stop working, which can avoid further consumption of the power battery and at the same time maintain the basic actions and moving functions of the work machine to facilitate the user to operate the work machine for charging, etc.

[0141] It can be understood that for the two work machine power architectures provided by the embodiments of the present invention, the VCU can implement the application of the energy control method provided by the embodiments of the present invention on the work machine through a control system architecture as Figure 5 shown, that is, by connecting the control systems of various components such as the VCU, the engine, the motor, and the power battery to achieve the control of each component.

[0142] Furthermore, the control systems of each component can also adopt an integrated controller or be integrated with the VCU, which is not specifically limited here.

[0143] Next, an energy control system provided by the present invention will be described. The energy control system described below can be mutually referred to with the energy control method described above.

[0144] As Figure 6As shown in the figure, an energy control system provided by the present invention is applied to a working machine power architecture composed of an engine, a first clutch, a motor, a motor controller, a transmission mechanism, and a power battery. The engine is connected to the motor through the first clutch, the motor is connected to the transmission mechanism, and the power battery is connected to the motor through the motor controller. The system includes: a first state acquisition module 610 and a first strategy execution module 620; wherein,

[0145] The first state acquisition module 610 is configured to acquire the first switch state of the first clutch;

[0146] The first strategy execution module 620 is configured to execute a first energy control strategy on the working machine when the first switch state is closed; or execute a second energy control strategy on the working machine when the first switch state is disengaged;

[0147] Wherein, the first energy control strategy includes: controlling the output power of the engine to match the required power of the transmission mechanism and the first required power of the motor. The first required power of the motor is used to drive the electrical load of the working machine and / or charge the power battery, and the initial value of the first required power of the motor is determined based on the difference between the preset best fuel consumption power of the engine and the theoretical required power of the working machine. The theoretical required power is determined based on the current working condition of the working machine and the preset required powers of the various working mechanisms of the working machine;

[0148] The second energy control strategy includes: controlling the output power of the power battery to match the required power of the electrical load and the second required power of the motor. The second required power of the motor is used to drive the transmission mechanism.

[0149] The energy control system provided by the embodiment of the present invention forms a power parallel architecture of the power battery and the engine by connecting the engine to the motor through a clutch, then connecting the motor to the transmission mechanism for driving the working mechanism, and then connecting the power battery to the motor through the controller of the motor. This enables the engine to directly participate in power output, avoiding secondary energy conversion and effectively improving energy utilization. When the clutch is closed, the output power of the engine is controlled to drive the transmission mechanism, and the power output from the engine to the motor is determined by the difference between the preset best fuel consumption power of the engine and the theoretical required power of the working machine. The theoretical required power of the working machine is determined based on the current working condition of the working machine and the preset required powers of the various working mechanisms of the working machine, thereby effectively reducing the real-time operation requirements and facilitating the real-time matching of the motor power and the engine working condition.

[0150] Optionally, the first energy control strategy further includes: determining whether the output power of the engine meets a first preset standard, where the first preset standard is that the ratio of the output power of the engine to the preset maximum power of the engine is less than or equal to a preset threshold; when it is determined that the output power of the engine does not meet the first preset standard, reducing the first required power of the motor until the output power of the engine meets the first preset standard.

[0151] Optionally, the first energy control strategy further includes: determining whether the first required power of the motor meets a second preset standard, where the second preset standard is that the charging power provided by the motor to the power battery is less than the preset allowable charging power of the power battery; when it is determined that the first required power of the motor does not meet the second preset standard, reducing the first required power of the motor until the charging power provided by the motor to the power battery is less than the preset allowable charging power of the power battery.

[0152] Optionally, the first energy control strategy further includes: obtaining the remaining power of the power battery; when the remaining power is greater than a preset power upper limit, sending a first control adjustment request signal and determining whether a first confirmation adjustment signal in response to the first control adjustment request signal is received; if the first confirmation adjustment signal is received, executing the second energy control strategy on the work machine; if the first confirmation adjustment signal is not received, controlling the power generated by the motor to match the power demand of the electrical load of the work machine, and the output power of the engine to match the demand power of the transmission mechanism and the third required power of the motor, where the third required power of the motor is the power required for the motor to generate electricity.

[0153] Optionally, the second energy control strategy further includes: obtaining the remaining power of the power battery; when the remaining power is less than a first preset power lower limit, sending a second control adjustment request signal and determining whether a second confirmation adjustment signal in response to the second control adjustment request signal is received; if the second confirmation adjustment signal is received, executing the first energy control strategy on the work machine; if the second confirmation adjustment signal is not received, continuously monitoring the remaining power, and when it is determined that the remaining power is less than a second preset power lower limit, controlling the work machine to stop operating.

[0154] Another energy control system provided by the present invention will be described below. The another energy control system described below can be correspondingly referred to the one energy control method described above.

[0155] As Figure 7As shown in the figure, an energy control system provided by the present invention is applied to a working machine power architecture composed of an engine, a first motor, a first motor controller, a second clutch, a second motor, a second motor controller, a transmission mechanism, and a power battery. The engine is connected to the first motor, the first motor is connected to the second motor through the second clutch, the second motor is connected to the transmission mechanism, and the power battery is connected to the first motor and the second motor through the first motor controller and the second motor controller respectively. The system includes: a second state acquisition module 710 and a second policy execution module 720; where,

[0156] The second state acquisition module 710 is configured to acquire the second switch state of the second clutch;

[0157] The second policy execution module 720 is configured to execute a third energy control policy on the working machine when the second switch state is closed; or, execute a fourth energy control policy on the working machine when the second switch state is disengaged;

[0158] Wherein, the third energy control policy includes: when the actual required power of the working mechanism of the working machine is less than the preset optimal fuel consumption power of the engine, controlling the output power of the engine to match the first required power of the transmission mechanism and the first motor, and the second motor stops working, and the first required power of the first motor is used to drive the electrical load of the working machine and / or charge the power battery; or, when the actual required power of the working mechanism is greater than or equal to the preset optimal fuel consumption power, controlling the first motor to stop generating electricity, and the output powers of the engine and the power battery match the required powers of the transmission mechanism and the electrical load, and the output power of the power battery is equal to the difference between the actual required power and the preset optimal fuel consumption power;

[0159] The fourth energy control policy includes: controlling the output power of the power battery to match the required power of the electrical load and the required power of the second motor, and the required power of the second motor is used to drive the transmission mechanism.

[0160] The energy control system provided by the embodiment of the present invention, by being applied to a power parallel working machine power architecture composed of an engine, a first motor, a first motor controller, a second clutch, a second motor, a second motor controller, a transmission mechanism, and a power battery, realizes a reasonable distribution of the output energy of the engine or the power battery, also avoids additional hardware costs, and improves the fault tolerance rate of the control system of the working machine. At the same time, through the setting of two motors, the power of the engine of the working machine can be relatively small, thereby further reducing the hardware cost of the working machine.

[0161] Optionally, the third energy control strategy further includes: obtaining the remaining power of the power battery; when the remaining power is greater than the first preset power upper limit, sending a control adjustment request signal and determining whether an acknowledgment adjustment signal in response to the control adjustment request signal is received; if the acknowledgment adjustment signal is received, executing the fourth energy control strategy on the work machine; if the acknowledgment adjustment signal is not received, when the remaining power is greater than the second preset power upper limit, controlling the power generated by the first motor to match the power demand of the electrical load, and the output power of the engine to match the demand power of the transmission mechanism and the second demand power of the first motor, where the second demand power of the first motor is the power required for the first motor to generate electricity.

[0162] Optionally, the third energy control strategy further includes: when the remaining power is less than the third preset power lower limit, sending a charging request signal and determining whether an acknowledgment charging signal in response to the charging request signal is received; if the acknowledgment charging signal is received, controlling the work machine to stop operating and wait for charging; if the acknowledgment charging signal is not received, when the remaining power is less than the fourth preset power lower limit, controlling the work machine to stop operating.

[0163] Optionally, the fourth energy control measurement may further include: when the remaining power is less than the fifth preset power lower limit, sending a control adjustment request signal and determining whether an acknowledgment adjustment signal in response to the control adjustment request signal is received; if the corresponding acknowledgment adjustment signal is received, executing the third energy control strategy on the work machine; if the corresponding acknowledgment adjustment signal is not received, continuously monitoring the remaining power of the power battery, and when it is determined that the remaining power is less than the sixth preset power lower limit, controlling the work machine to stop operating.

[0164] The embodiment of the present invention further provides a work machine including the energy control system as described in any of the above embodiments.

[0165] It can be understood that the work machine including the energy control system as described in any of the above embodiments has all the advantages and technical effects of the energy control system as described in any of the above embodiments, which will not be elaborated here.

[0166] Figure 8 Schematically shows the physical structure of an electronic device, such as Figure 8As shown, the electronic device may include: a processor 810, a communications interface 820, a memory 830, and a communication bus 840. Among them, the processor 810, the communication interface 820, and the memory 830 complete communication with each other through the communication bus 840. The processor 810 may call logic instructions in the memory 830 to execute an energy control method, which is applied to a working machine power architecture composed of an engine, a first clutch, an electric motor, a motor controller, a transmission mechanism, and a power battery. The engine is connected to the electric motor through the first clutch, the electric motor is connected to the transmission mechanism, and the power battery is connected to the electric motor through the motor controller. Among them, the method includes: obtaining a first switch state of the first clutch; when the first switch state is closed, executing a first energy control strategy on the working machine; when the first switch state is disengaged, executing a second energy control strategy on the working machine; where the first energy control strategy includes: controlling the output power of the engine to match the demand power of the transmission mechanism and a first demand power of the electric motor, the first demand power of the electric motor is used to drive the electrical load of the working machine and / or charge the power battery, and the initial value of the first demand power of the electric motor is determined based on the difference between the preset optimal fuel consumption power of the engine and the theoretical demand power of the working machine, and the theoretical demand power is determined based on the current working condition of the working machine and the preset demand power of each working mechanism of the working machine; the second energy control strategy includes: controlling the output power of the power battery to match the demand power of the electrical load and a second demand power of the electric motor, and the second demand power of the electric motor is used to drive the transmission mechanism.Or it is applied to a working machine power architecture composed of an engine, a first motor, a first motor controller, a second clutch, a second motor, a second motor controller, a transmission mechanism, and a power battery. The engine is connected to the first motor, the first motor is connected to the second motor through the second clutch, the second motor is connected to the transmission mechanism, and the power battery is connected to the first motor and the second motor through the first motor controller and the second motor controller respectively. Wherein, the method includes: obtaining a second switch state of the second clutch; when the second switch state is closed, executing a third energy control strategy on the working machine; when the second switch state is disengaged, executing a fourth energy control strategy on the working machine; wherein, the third energy control strategy includes: when the actual required power of the working mechanism of the working machine is less than the preset optimal fuel consumption power of the engine, controlling the output power of the engine to match the first required power of the transmission mechanism and the first motor, the second motor stops working, and the first required power of the first motor is used to drive the electrical load of the working machine and / or charge the power battery; or, when the actual required power of the working mechanism is greater than or equal to the preset optimal fuel consumption power, controlling the first motor to stop generating electricity, the output powers of the engine and the power battery match the required power of the transmission mechanism and the electrical load, and the output power of the power battery is equal to the difference between the actual required power and the preset optimal fuel consumption power; the fourth energy control strategy includes: controlling the output power of the power battery to match the required power of the electrical load and the required power of the second motor, and the required power of the second motor is used to drive the transmission mechanism.

[0167] In addition, when the logical instructions in the above-mentioned memory 830 can be implemented in the form of software functional units and sold or used as an independent product, they can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or a part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present invention. And the foregoing storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), magnetic disks, or optical discs that can store program codes.

[0168] On the other hand, the present invention also provides a computer program product, which includes a computer program stored on a non-transitory computer-readable storage medium. The computer program includes program instructions. When the program instructions are executed by a computer, the computer can execute an energy control method provided by each of the above methods. The energy control method is applied to a working machine power architecture composed of an engine, a first clutch, a motor, a motor controller, a transmission mechanism, and a power battery. The engine is connected to the motor through the first clutch, the motor is connected to the transmission mechanism, and the power battery is connected to the motor through the controller of the motor. Wherein, the method includes: obtaining a first switch state of the first clutch; when the first switch state is closed, executing a first energy control strategy on the working machine; when the first switch state is disengaged, executing a second energy control strategy on the working machine; wherein, the first energy control strategy includes: controlling the output power of the engine to match the demand power of the transmission mechanism and the first demand power of the motor. The first demand power of the motor is used to drive the electrical load of the working machine and / or charge the power battery, and the initial value of the first demand power of the motor is determined based on the difference between the preset optimal fuel consumption power of the engine and the theoretical demand power of the working machine. The theoretical demand power is determined based on the current working condition of the working machine and the preset demand power of each working mechanism of the working machine; the second energy control strategy includes: controlling the output power of the power battery to match the demand power of the electrical load and the second demand power of the motor. The second demand power of the motor is used to drive the transmission mechanism.Or it is applied to a working machine power architecture composed of an engine, a first motor, a first motor controller, a second clutch, a second motor, a second motor controller, a transmission mechanism, and a power battery. The engine is connected to the first motor, the first motor is connected to the second motor through the second clutch, the second motor is connected to the transmission mechanism, and the power battery is connected to the first motor and the second motor through the first motor controller and the second motor controller respectively. Wherein, the method includes: obtaining the switch state of the second clutch; when the second switch state is closed, implementing a third energy control strategy for the working machine; when the second switch state is disengaged, implementing a fourth energy control strategy for the working machine; wherein, the third energy control strategy includes: when the actual required power of the working mechanism of the working machine is less than the preset optimal fuel consumption power of the engine, controlling the output power of the engine to match the first required power of the transmission mechanism and the first motor, the second motor stops working, and the first required power of the first motor is used to drive the electrical load of the working machine and / or charge the power battery; or, when the actual required power of the working mechanism is greater than or equal to the preset optimal fuel consumption power, controlling the first motor to stop generating electricity, the output powers of the engine and the power battery match the required powers of the transmission mechanism and the electrical load, and the output power of the power battery is equal to the difference between the actual required power and the preset optimal fuel consumption power; the fourth energy control strategy includes: controlling the output power of the power battery to match the electrical load of the transmission mechanism and the required power of the second motor, and the required power of the second motor is used to drive the transmission mechanism.

[0169] In another aspect, the present invention further provides a non-transitory computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, an energy control method is implemented, which is applied to a working machine power architecture composed of an engine, a first clutch, a motor, a motor controller, a transmission mechanism, and a power battery. The engine is connected to the motor through the first clutch, the motor is connected to the transmission mechanism, and the power battery is connected to the motor through the motor controller. Wherein, the method includes: obtaining a first switch state of the first clutch; when the first switch state is closed, executing a first energy control strategy on the working machine; when the first switch state is disengaged, executing a second energy control strategy on the working machine; wherein, the first energy control strategy includes: controlling the output power of the engine to match the demand power of the transmission mechanism and a first demand power of the motor, the first demand power of the motor is used to drive the electrical load of the working machine and / or charge the power battery, and the initial value of the first demand power of the motor is determined based on the difference between the preset best fuel consumption power of the engine and the theoretical demand power of the working machine, and the theoretical demand power is determined based on the current working condition of the working machine and the preset demand power of each working mechanism of the working machine; the second energy control strategy includes: controlling the output power of the power battery to match the demand power of the electrical load and a second demand power of the motor, and the second demand power of the motor is used to drive the transmission mechanism.Or it is applied to a working machine power architecture composed of an engine, a first motor, a first motor controller, a second clutch, a second motor, a second motor controller, a transmission mechanism, and a power battery. The engine is connected to the first motor, the first motor is connected to the second motor through the second clutch, the second motor is connected to the transmission mechanism, and the power battery is connected to the first motor and the second motor through the first motor controller and the second motor controller respectively. Wherein, the method includes: obtaining a second switch state of the second clutch; when the second switch state is closed, implementing a third energy control strategy for the working machine; when the second switch state is disengaged, implementing a fourth energy control strategy for the working machine; wherein, the third energy control strategy includes: when the actual required power of the working mechanism of the working machine is less than the preset optimal fuel consumption power of the engine, controlling the output power of the engine to match the first required power of the transmission mechanism and the first motor, stopping the second motor from doing work, and the first required power of the first motor is used to drive the electrical load of the working machine and / or charge the power battery; or, when the actual required power of the working mechanism is greater than or equal to the preset optimal fuel consumption power, controlling the first motor to stop generating electricity, and the output powers of the engine and the power battery match the required powers of the transmission mechanism and the electrical load, and the output power of the power battery is equal to the difference between the actual required power and the preset optimal fuel consumption power; the fourth energy control strategy includes: controlling the output power of the power battery to match the required power of the electrical load and the required power of the second motor, and the required power of the second motor is used to drive the transmission mechanism.

[0170] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art can understand and implement it without creative efforts.

[0171] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on such an understanding, the essence of the above technical solution, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0172] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An energy control method, characterized in that, Applied to a working machine power architecture composed of an engine, a first clutch, an electric motor, an electric motor controller, a transmission mechanism, and a power battery, the engine is connected to the electric motor through the first clutch, the electric motor is connected to the transmission mechanism, and the power battery is connected to the electric motor through the electric motor controller. Wherein, the energy control method includes: Obtain the first switch state of the first clutch; When the first switch state is closed, execute a first energy control strategy for the working machine; When the first switch state is disengaged, execute a second energy control strategy for the working machine; Wherein, the first energy control strategy includes: controlling the output power of the engine to match the required power of the transmission mechanism and the first required power of the electric motor. The first required power of the electric motor is used to drive the electrical load of the working machine and / or charge the power battery, and the initial value of the first required power of the electric motor is determined based on the difference between the preset optimal fuel consumption power of the engine and the theoretical required power of the working machine. The theoretical required power is determined based on the current working condition of the working machine and the preset required powers of the various working mechanisms of the working machine; The first energy control strategy further includes: determining whether the output power of the engine meets a first preset standard, the first preset standard being that the ratio of the output power of the engine to the preset maximum power of the engine is less than or equal to a preset threshold; when it is determined that the output power of the engine does not meet the first preset standard, reducing the first required power of the electric motor until the output power of the engine meets the first preset standard; The second energy control strategy includes: controlling the output power of the power battery to match the required power of the electrical load and the second required power of the electric motor. The second required power of the electric motor is used to drive the transmission mechanism.

2. The energy control method according to claim 1, wherein The first energy control strategy further includes: Determining whether the first required power of the electric motor meets a second preset standard, the second preset standard being that the charging power provided by the electric motor for the power battery is less than the preset allowable charging power of the power battery; When it is determined that the first required power of the electric motor does not meet the second preset standard, reducing the first required power of the electric motor until the charging power provided by the electric motor for the power battery is less than the preset allowable charging power of the power battery.

3. The energy control method according to claim 1, characterized in that, The first energy control strategy further includes: Obtain the remaining power of the power battery; When the remaining power is greater than the preset power upper limit, send a first control adjustment request signal and determine whether a first confirmation adjustment signal in response to the first control adjustment request signal is received; If the first confirmation adjustment signal is received, execute the second energy control strategy for the working machine; If the first confirmation adjustment signal is not received, control the power generated by the electric motor to match the power requirement of the electrical load of the working machine, and control the output power of the engine to match the required power of the transmission mechanism and the third required power of the electric motor. The third required power of the electric motor is the power required for the electric motor to generate electricity.

4. The energy control method according to claim 1, wherein The second energy control strategy further includes: Obtaining the remaining power of the power battery; When the remaining power is less than the lower limit of the first preset power, sending a second control adjustment request signal and determining whether a second confirmation adjustment signal in response to the second control adjustment request signal is received; If the second confirmation adjustment signal is received, performing the first energy control strategy on the working machine; If the second confirmation adjustment signal is not received, continuously monitoring the remaining power, and when it is determined that the remaining power is less than the lower limit of the second preset power, controlling the working machine to stop working.

5. An energy control method, characterized in that, Applied to a working machine power architecture composed of an engine, a first motor, a first motor controller, a second clutch, a second motor, a second motor controller, a transmission mechanism, and a power battery, the engine is connected to the first motor, the first motor is connected to the second motor through the second clutch, the second motor is connected to the transmission mechanism, and the power battery is connected to the first motor and the second motor through the first motor controller and the second motor controller respectively. Wherein, the energy control method includes: Obtaining the second switch state of the second clutch; When the second switch state is closed, performing a third energy control strategy on the working machine; When the second switch state is separated, performing a fourth energy control strategy on the working machine; Wherein, the third energy control strategy includes: when the actual required power of the working mechanism of the working machine is less than the preset best fuel consumption power of the engine, controlling the output power of the engine to match the first required power of the transmission mechanism and the first motor, the second motor stops working, and the first required power of the first motor is used to drive the electrical load of the working machine and / or charge the power battery; when the actual required power of the working mechanism is greater than or equal to the preset best fuel consumption power, controlling the first motor to stop generating electricity, the output power of the engine and the power battery to match the required power of the transmission mechanism and the electrical load, and the output power of the power battery to be equal to the difference between the actual required power and the preset best fuel consumption power; The fourth energy control strategy includes: controlling the output power of the power battery to match the required power of the electrical load and the required power of the second motor, and the required power of the second motor is used to drive the transmission mechanism.

6. The energy control method according to claim 5, wherein The third energy control strategy further includes: Obtaining the remaining power of the power battery; When the remaining power is greater than the upper limit of the first preset power, sending a control adjustment request signal and determining whether a confirmation adjustment signal in response to the control adjustment request signal is received; If the confirmation adjustment signal is received, performing the fourth energy control strategy on the working machine; If the confirmation adjustment signal is not received, when the remaining power is greater than the second preset upper power limit, control the power generated by the first motor to match the power demand of the electrical load, and control the output power of the engine to match the demand power of the transmission mechanism and the second demand power of the first motor, where the second demand power of the first motor is the power required for the first motor to generate electricity; When the remaining power is less than the third preset lower power limit, send a charging request signal, and determine whether a confirmation charging signal in response to the charging request signal is received; If the confirmation charging signal is received, control the construction machine to stop working and wait for charging; If the confirmation charging signal is not received, when the remaining power is less than the fourth preset lower power limit, control the construction machine to stop working.

7. An energy control system, characterized in that, Applied to a construction machine power architecture composed of an engine, a first clutch, a motor, a motor controller, a transmission mechanism, and a power battery, the engine is connected to the motor through the first clutch, the motor is connected to the transmission mechanism, and the power battery is connected to the motor through the motor controller. Among them, the energy control system includes: A first state acquisition module for acquiring the first switch state of the first clutch; A first strategy execution module for, when the first switch state is closed, executing a first energy control strategy on the construction machine; and when the first switch state is disengaged, executing a second energy control strategy on the construction machine; Among them, the first energy control strategy includes: controlling the output power of the engine to match the demand power of the transmission mechanism and the first demand power of the motor, where the first demand power of the motor is used to drive the electrical load of the construction machine and / or charge the power battery, and the initial value of the first demand power of the motor is determined based on the difference between the preset optimal fuel consumption power of the engine and the theoretical demand power of the construction machine, and the theoretical demand power is determined based on the current working condition of the construction machine and the preset demand power of each working mechanism of the construction machine; the first energy control strategy further includes: determining whether the output power of the engine meets a first preset standard, where the first preset standard is that the ratio of the output power of the engine to the preset maximum power of the engine is less than or equal to a preset threshold; when it is determined that the output power of the engine does not meet the first preset standard, reducing the first demand power of the motor until the output power of the engine meets the first preset standard; The second energy control strategy includes: controlling the output power of the power battery to match the demand power of the electrical load and the second demand power of the motor, where the second demand power of the motor is used to drive the transmission mechanism.

8. An energy control system, characterized in that, Applied to a working machine power architecture composed of an engine, a first motor, a first motor controller, a second clutch, a second motor, a second motor controller, a transmission mechanism, and a power battery, the engine is connected to the first motor, the first motor is connected to the second motor through the second clutch, the second motor is connected to the transmission mechanism, and the power battery is connected to the first motor and the second motor through the first motor controller and the second motor controller respectively. Among them, the energy control system includes: A second state acquisition module for acquiring the second switch state of the second clutch; A second strategy execution module for executing a third energy control strategy for the working machine when the second switch state is closed; and executing a fourth energy control strategy for the working machine when the second switch state is disengaged; Among them, the third energy control strategy includes: when the actual required power of the working mechanism of the working machine is less than the preset optimal fuel consumption power of the engine, controlling the output power of the engine to match the first required power of the transmission mechanism and the first motor, the second motor stops working, and the first required power of the first motor is used to drive the electrical load of the working machine and / or charge the power battery; when the actual required power of the working mechanism is greater than or equal to the preset optimal fuel consumption power, controlling the first motor to stop generating electricity, and the output powers of the engine and the power battery match the required powers of the transmission mechanism and the electrical load, and the output power of the power battery is equal to the difference between the actual required power and the preset optimal fuel consumption power; The fourth energy control strategy includes: controlling the output power of the power battery to match the required power of the electrical load and the required power of the second motor, and the required power of the second motor is used to drive the transmission mechanism.

9. An operating machine, characterized in that, Including the energy control system according to claim 7 or 8.

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