Electric commercial vehicle and power supply control method

Abstract

The present invention discloses an electric commercial vehicle and a power supply control method. The electric commercial vehicle comprises: a main controller, a motor controller, a first switch control module and a refrigeration unit; the main controller is communicatively connected with the motor controller, the output end of the motor controller is connected with the input end of the first switch control module, and the refrigeration unit is connected with the first output end of the first switch control module; the main controller is used to generate a corresponding first switch control instruction according to the current refrigeration parameter of the refrigeration unit, and send the first switch control instruction to the motor controller; the motor controller is used to control the on-off between the input end and the first output end of the first switch control module according to the first switch control instruction, so as to control the power supply of the motor controller to the refrigeration unit, thereby realizing the charge and discharge management of the electric commercial vehicle through the first switch control module, and achieving the purpose of long driving range and efficient refrigeration of the electric commercial vehicle.

Description

Technical Field

[0001] The embodiments of the present invention relate to vehicle power supply technology, and more particularly to an electric commercial vehicle and a power supply control method. Background Art

[0002] With the continuous development of science and technology, extended-range electric commercial vehicles have become the trend of the new era and have solved a certain problem of endurance.

[0003] At present, extended-range electric commercial vehicles, especially box-type refrigerated trucks, need to provide electricity not only for the vehicle but also for the refrigeration unit during driving. However, due to the limited battery capacity in the power battery, it cannot meet the power demand of box-type refrigerated trucks during long-distance driving. Especially when the on-board equipment such as the refrigeration unit needs to work for a long time, the insufficient power of the vehicle power battery leads to a contradiction between the driving range and the refrigeration of goods. Summary of the invention

[0004] In view of this, the present invention provides an electric commercial vehicle and a power supply control method to achieve dynamic control of power supply to the electric commercial vehicle, thereby achieving the purpose of long driving range and efficient refrigeration of the electric commercial vehicle.

[0005] In a first aspect, an embodiment of the present invention provides an electric commercial vehicle, comprising: a main controller, a motor controller, a first switch control module, and a refrigeration unit;

[0006] The main controller is connected to the motor controller for communication, the output end of the motor controller is connected to the input end of the first switch control module, and the refrigeration unit is connected to the first output end of the first switch control module;

[0007] The main controller is used to generate a corresponding first switch control instruction according to the current refrigeration parameters of the refrigeration unit, and send the first switch control instruction to the motor controller;

[0008] The motor controller is used to control the on / off between the input end and the first output end of the first switch control module according to the first switch control instruction, so as to control the power supply of the motor controller itself to the refrigeration unit.

[0009] Furthermore, the electric commercial vehicle further includes: a drive motor, the drive motor being connected to the second output terminal of the first switch control module;

[0010] The main controller is used to generate a corresponding second switch control instruction according to the vehicle start-stop instruction, and send the second switch control instruction to the motor controller;

[0011] The motor controller is used to control the on / off between the input end and the second output end of the first switch control module according to the second switch control instruction, so as to control the power supply of the motor controller itself to the drive motor.

[0012] Furthermore, the electric commercial vehicle further includes: a power battery, wherein the power battery is connected to the third output terminal of the first switch control module;

[0013] The main controller is used to generate a corresponding third switch control instruction according to the energy storage instruction, and send the third switch control instruction to the motor controller;

[0014] The motor controller is used to control the on / off between the input end of the first switch control module and the third output end according to the third switch control instruction, so as to control the power supply of the motor controller itself to the power battery.

[0015] Furthermore, the electric commercial vehicle further includes: an inverter, a second switch control module and at least one AC power-consuming device;

[0016] The first end of the inverter is connected to the fourth output end of the first switch control module, the second end of the inverter is connected to the input end of the second switch control module, and the output end of the second switch control module is connected to the AC power device;

[0017] The main controller is used to generate a corresponding fourth switch control instruction according to the AC power usage instruction, and send the fourth switch control instruction to the motor controller;

[0018] The motor controller is used to control the on / off between the input terminal and the fourth output terminal of the first switch control module according to the fourth switch control instruction, so as to control the power supply of the motor controller itself to the inverter;

[0019] The inverter is used to convert the direct current converted by the motor controller into alternating current and control the on and off of the second switch control module according to the AC power consumption instruction, so as to control the inverter itself to supply power to the AC power consumption equipment.

[0020] Furthermore, the electric commercial vehicle further comprises: a switching power supply, a third switch control module and at least one DC power-consuming device;

[0021] The first end of the switching power supply is connected to the fifth output end of the first switch control module, the second end of the switching power supply is connected to the input end of the third switch control module, and the output end of the third switch control module is connected to the DC power device;

[0022] The main controller is used to generate a corresponding fifth switch control instruction according to the DC power consumption instruction, and send the fifth switch control instruction to the motor controller;

[0023] The motor controller is used to control the on / off between the input terminal and the fifth output terminal of the first switch control module according to the fifth switch control instruction, so as to control the power supply of the motor controller itself to the switch power supply;

[0024] The switching power supply is used to convert the current voltage DC output by the motor controller into the target voltage DC and control the on and off of the third switch control module according to the DC power consumption instruction to control the switching power supply itself to supply power to the DC power-consuming device.

[0025] Furthermore, the electric commercial vehicle further comprises: an alcohol fuel tank, an internal combustion engine and an ISG motor integrated with starting / generating power; the alcohol fuel tank is connected to the input end of the internal combustion engine, the output end of the internal combustion engine is connected to the first end of the ISG motor, and the second end of the ISG motor is connected to the input end of the motor controller;

[0026] When the main controller receives a vehicle start command, the alcohol fuel in the alcohol fuel tank is input into the internal combustion engine for combustion, and the ISG motor is driven to generate electricity through the power output shaft of the internal combustion engine.

[0027] Furthermore, the first switch control module is a relay.

[0028] In a second aspect, an embodiment of the present invention provides a power supply control method, including:

[0029] Receive current refrigeration parameters sent by the refrigeration unit;

[0030] Generate a corresponding first switch control instruction according to the current refrigeration parameter;

[0031] The first switch control instruction is sent to the motor controller, so that the motor controller controls the motor controller itself to supply power to the refrigeration unit according to the first switch control instruction.

[0032] Furthermore, generating a corresponding switch control instruction according to the current refrigeration parameter includes:

[0033] Extracting the current refrigeration temperature from the current refrigeration parameters;

[0034] If the current refrigeration temperature is lower than the preset refrigeration temperature threshold, generating a first disconnection control instruction;

[0035] If the current refrigeration temperature is higher than the preset refrigeration temperature threshold, a first conduction control instruction is generated.

[0036] Furthermore, the preset refrigeration temperature threshold is related to the properties of the transported goods.

[0037] The present invention adds a first switch control module to the electric commercial vehicle and controls the on-off between the refrigeration unit and the motor controller through the first switch control instruction sent by the main controller, thereby solving the problem in the prior art that when the refrigeration unit is in a long-term working state, the power battery has insufficient power, which leads to an imbalance between the cruising range and the refrigeration of goods. The present invention realizes the charge and discharge management of the electric commercial vehicle through the first switch control module, and achieves the purpose of long cruising range and efficient refrigeration of the electric commercial vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 is a structural schematic diagram of an electric commercial vehicle provided by Embodiment 1 of the present invention;

[0039] Figure 2 is a structural schematic diagram of an electric commercial vehicle provided by Embodiment 2 of the present invention;

[0040] Figure 3 is a structural schematic diagram of an electric commercial vehicle provided by Embodiment 3 of the present invention;

[0041] Figure 4 is a structural schematic diagram of an electric commercial vehicle provided by a fourth embodiment of the present invention;

[0042] Figure 5 is a structural schematic diagram of an electric commercial vehicle provided by Embodiment 5 of the present invention;

[0043] Figure 6 is a structural schematic diagram of an electric commercial vehicle provided by Embodiment 6 of the present invention;

[0044] Figure 7 This is a schematic diagram of a power distribution structure of an electric commercial vehicle provided in Embodiment 7 of the present invention;

[0045] Figure 8 is a schematic diagram of the structure of an electric commercial vehicle provided by Embodiment 8 of the present invention;

[0046] Fig. 9 This is a flow chart of a power supply control method provided in Embodiment 9 of the present invention. DETAILED DESCRIPTION

[0047] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0048] It should be noted that, according to the different power supply methods, electric commercial vehicles can be divided into pure electric commercial vehicles, plug-in electric commercial vehicles and alcohol-based extended-range electric commercial vehicles. The existing power supply methods corresponding to these three types of vehicles are now explained. The details are as follows:

[0049] First, pure electric commercial vehicles, especially pure electric commercial vehicles, need to use power batteries to provide power for the vehicle's refrigeration equipment. Due to the limited power of the power battery, the vehicle consumes a lot of power when driving at high speeds under heavy load. In this state, if the power demand for refrigeration equipment is turned off or reduced, the goods transported during long-distance transportation will not be effectively refrigerated, resulting in losses. Increasing the power demand for refrigeration equipment will inevitably lead to increased power battery consumption, reducing the vehicle's mileage, and the power battery is in a deep charge and discharge state, reducing the service life of the power battery.

[0050] Second, plug-in electric commercial vehicles, especially plug-in electric commercial vehicles, need to be powered by an external power supply system. However, the use of an external power supply system is limited by factors such as charging sites and cannot meet the requirements of efficient long-distance cargo transportation. At the same time, the external power supply system also delays transportation time due to the fixed site. The increase in external charging time has led to a longer time for electric commercial vehicles to start the refrigeration equipment, consuming more electricity.

[0051] Third, if alcohol-based extended-range electric commercial vehicles, especially alcohol-based extended-range electric commercial vehicles, use portable batteries to provide power for the entire vehicle, due to the limited capacity of a single battery, carrying more battery packs will increase the weight and capacity of the entire vehicle, and reduce the number of batteries, resulting in frequent battery charging and discharging, making the utilization rate of the entire vehicle power generation low. At the same time, most batteries output low-power direct current, which cannot meet the use requirements of the vehicle's high-power AC electrical equipment.

[0052] Fourth, if alcohol-based extended-range electric commercial vehicles, especially alcohol-based extended-range electric commercial vehicles, simply use an integrated starter and generator (ISG) to directly provide power for the vehicle's electrical equipment. However, due to the different road conditions on which the vehicle is traveling, when the transported goods require long-term low-temperature refrigeration, the electrical equipment consumes a lot of power, resulting in frequent start-up of the range extender in the vehicle. Frequent start-up of the range extender increases the fuel consumption for power generation, and cannot meet the timeliness requirements for refrigeration of the transported goods. If the fuel carried is insufficient, the power battery is required to replenish the energy. If the power battery cannot replenish the energy in time, the refrigeration equipment will be shut down, which will affect the transportation and refrigeration needs of the transported goods.

[0053] In order to meet the power supply demand of alcohol-based extended-range electric commercial vehicles when fully loaded and traveling over long distances, this solution provides an electric commercial vehicle and a power supply control method to monitor and distribute the power generated by the entire vehicle in real time.

[0054] Embodiment 1

[0055] Figure 1 It is a structural schematic diagram of an electric commercial vehicle provided in Embodiment 1 of the present invention. The technical solution of this embodiment is applicable to the case of dynamically powering a refrigeration unit. The vehicle can be implemented by software and / or hardware. The vehicle can be composed of two or more physical entities or one physical entity.

[0056] refer to Figure 1 , the electric commercial vehicle in this embodiment includes: a main controller 101, a motor controller 102, a first switch control module 103 and a refrigeration unit 104;

[0057] The main controller 101 is connected to the motor controller 102 in communication, the output end of the motor controller 102 is connected to the input end of the first switch control module 103, and the refrigeration unit 104 is connected to the first output end of the first switch control module 103;

[0058] The main controller 101 is used to generate a corresponding first switch control instruction according to the current refrigeration parameters of the refrigeration unit 104, and send the first switch control instruction to the motor controller 102;

[0059] The motor controller 102 is used to control the on / off between the input terminal and the first output terminal of the first switch control module 103 according to the first switch control instruction, so as to control the power supply of the motor controller 102 to the refrigeration unit 104 .

[0060] It should be noted that, in order to monitor the current refrigeration parameters of the refrigeration unit 104 in real time, a monitoring sensor is configured in the refrigeration unit 104, and the monitoring sensor is used to monitor and collect the current refrigeration parameters of the refrigeration unit 104, and send the collected current refrigeration parameters to the main controller 101. After the main controller 101 receives the current refrigeration parameters of the refrigeration unit 104, the main controller 101 analyzes and processes the current refrigeration parameters to determine whether to supply power to the refrigeration unit 104.

[0061] The first switch control instruction may include a first disconnection control instruction and a first conduction control instruction. In an embodiment, when power is required to be supplied to the refrigeration unit 104, the first switch control instruction is a first conduction control instruction; correspondingly, when power is not required to be supplied to the refrigeration unit 104, the first switch control instruction is a first disconnection control instruction.

[0062] Specifically, if the refrigeration unit 104 needs to be powered, the main controller 101 generates a first conduction control instruction and sends the first conduction control instruction to the motor controller 102, so that the motor controller 102 controls the connection between the input end and the first output end of the first switch control module 103, so that the electric energy output by the motor controller 102 can be supplied to the refrigeration unit 104 through the first switch control module 103; if the refrigeration unit 104 does not need to be powered, the main controller 101 generates a first disconnection control instruction and sends the first disconnection control instruction to the motor controller 102, so that the motor controller 102 controls the connection between the input end and the first output end of the first switch control module 103 to be disconnected, so that the motor controller 102 cannot supply the output electric energy to the refrigeration unit 104. The first switch control module 103 is a relay.

[0063] The current refrigeration parameter may include the current refrigeration temperature of the refrigeration unit 104. In an embodiment, whether power needs to be supplied to the refrigeration unit 104 may be determined by comparing the current refrigeration temperature with a preset refrigeration temperature threshold. Specifically, if the current refrigeration temperature is lower than the preset refrigeration temperature threshold, there is no need to supply power to the refrigeration unit 104, and the power supply to the refrigeration unit 104 can be stopped. Accordingly, the main controller 101 generates a first disconnection control instruction and sends the first disconnection control instruction to the motor controller 102, so that the motor controller 102 controls the input end and the first output end of the first switch control module 103 to be disconnected, so that the motor controller 102 cannot supply the output electric energy to the refrigeration unit 104; if the current refrigeration temperature is higher than the preset refrigeration temperature threshold, in order to ensure the refrigeration of the goods transported in the electric commercial vehicle and avoid the deterioration of the transported goods, it is necessary to supply power to the refrigeration unit 104. Accordingly, the main controller 101 generates a first conduction control instruction and sends the first conduction control instruction to the motor controller 102, so that the motor controller 102 controls the input end and the first output end of the first switch control module 103 to be conducted, so that the motor controller 102 can supply the output electric energy to the refrigeration unit 104.

[0064] The technical solution of this embodiment is that the main controller is connected to the motor controller through communication, the input end of the first switch control module is connected to the output end of the motor controller, and the first output end of the first switch control module is connected to the refrigeration unit; when the main controller receives the current refrigeration parameters of the refrigeration unit, it generates a first switch control instruction according to the current refrigeration parameters, and sends the first switch control instruction to the motor controller, so that the motor controller controls the on-off between the input end and the first output end of the first switch control module according to the first switch control instruction, so as to control the power supply of the motor controller to the refrigeration unit. This solves the problem in the prior art that when the refrigeration unit is in a long-term working state, the insufficient power of the power battery leads to an imbalance between the cruising range and the refrigeration of goods, and realizes the charging and discharging management of the electric commercial vehicle through the first switch control module, so as to achieve the purpose of long cruising range and efficient refrigeration of the electric commercial vehicle.

[0065] Embodiment 2

[0066] Figure 2 It is a structural schematic diagram of an electric commercial vehicle provided in Embodiment 2 of the present invention. Figure 2 is Figure 1 On the basis of the above embodiments, in order to enable the electric commercial vehicle to travel, a drive motor needs to be configured in the electric commercial vehicle to drive the vehicle to travel.

[0067] refer to Figure 2 , the electric commercial vehicle further includes: a drive motor 105, the drive motor 105 is connected to the second output end of the first switch control module 103;

[0068] The main controller 101 is used to generate a corresponding second switch control instruction according to the vehicle start-stop instruction, and send the second switch control instruction to the motor controller 102;

[0069] The motor controller 102 is used to control the on / off between the input terminal and the second output terminal of the first switch control module 103 according to the second switch control instruction, so as to control the power supply of the motor controller 102 to the drive motor 105 .

[0070] It should be noted that the vehicle start-stop command is used to switch the working state or the stopped state of the electric commercial vehicle. It can be understood that the vehicle start-stop command includes a vehicle start command and a vehicle stop command. If it is a vehicle start command, it indicates that the electric commercial vehicle is in a working state (i.e., the electric commercial vehicle is started or driving); if it is a vehicle stop command, it indicates that the electric commercial vehicle is in a stopped state (i.e., the electric commercial vehicle is not started).

[0071] In an embodiment, the second switch control instruction includes a second disconnection control instruction and a second conduction control instruction. In an embodiment, when the electric commercial vehicle is in a working state, power needs to be supplied to the drive motor 105, and the second switch control instruction is a second conduction control instruction; correspondingly, when the electric commercial vehicle is in a stopped state, power does not need to be supplied to the drive motor 105, and the second switch control instruction is a second disconnection control instruction.

[0072] Of course, in the embodiment, in order to realize dynamic control of the power supply of the refrigeration unit 104, it can only be considered when the electric commercial vehicle is in working state. It can be understood that the second switch control instruction is a second conduction control instruction to put the electric commercial vehicle in working state. Specifically, when the main controller 101 receives the vehicle start instruction, the main controller 101 generates a corresponding second conduction control instruction, and sends the second conduction control instruction to the motor controller 102, so that the motor controller 102 controls the connection between the input end and the second output end of the first switch control module 103 according to the second switch control instruction, so that the electric energy output by the motor controller 102 can be supplied to the drive motor 105 through the first switch control module 103, so as to drive the electric commercial vehicle to travel through the drive motor 105.

[0073] Embodiment 3

[0074] Figure 3 It is a structural schematic diagram of an electric commercial vehicle provided in Embodiment 3 of the present invention. Figure 3 is Figure 2 On the basis of the above embodiment, when the motor controller 102 generates excess electric energy, the excess electric energy needs to be stored for subsequent power supply.

[0075] refer to Figure 3 , the electric commercial vehicle further includes: a power battery 106, the power battery 106 is connected to the third output terminal of the first switch control module 103;

[0076] The main controller 101 is used to generate a corresponding third switch control instruction according to the energy storage instruction, and send the third switch control instruction to the motor controller 102;

[0077] The motor controller 102 is used to control the on / off between the input terminal and the third output terminal of the first switch control module 103 according to the third switch control instruction, so as to control the power supply of the motor controller 102 to the power battery 106 .

[0078] The energy storage instruction refers to an instruction to store electric energy. In the embodiment, when the direct current converted by the motor controller 102 is used to supply the driving motor 105 for normal operation, if there is excess electric energy, the excess electric energy needs to be stored so as to supply power to other electric devices later.

[0079] In an embodiment, the third switch control instruction includes a third disconnection control instruction and a third conduction control instruction. Specifically, when the excess electric energy needs to be charged into the power battery 106, the third switch control instruction is a third conduction control instruction; accordingly, the DC power converted by the motor controller 102 is used for power supply, and there is no need to store energy, that is, the third switch control instruction is a third disconnection control instruction. Specifically, when the main controller 101 receives the energy storage instruction, the third conduction control instruction is generated according to the energy storage instruction, and the third conduction control instruction is sent to the motor controller 102, so that the motor controller 102 controls the connection between the input end and the third output end of the first switch control module 103 according to the third conduction control instruction, so that the excess electric energy output by the motor controller 102 can be charged into the power battery 106.

[0080] Embodiment 4

[0081] Figure 4 It is a structural schematic diagram of an electric commercial vehicle provided in Embodiment 4 of the present invention. Figure 4 is Figure 3 On the basis of the above, the structure of the electric commercial vehicle is further described. It should be noted that the electric energy output by the motor controller 102 is direct current. When it is necessary to power an alternating current power-consuming device, the electric energy output by the motor controller 102 needs to be converted into alternating current.

[0082] refer to Figure 4 , the electric commercial vehicle further includes: an inverter 107, a second switch control module 108 and at least one AC power device 109;

[0083] The first end of the inverter 107 is connected to the fourth output end of the first switch control module 103, the second end of the inverter 107 is connected to the input end of the second switch control module 108, and the output end of the second switch control module 108 is connected to the AC power device 109;

[0084] The main controller 101 is used to generate a corresponding fourth switch control instruction according to the AC power usage instruction, and send the fourth switch control instruction to the motor controller 102;

[0085] The motor controller 102 is used to control the on / off between the input terminal and the fourth output terminal of the first switch control module 103 according to the fourth switch control instruction, so as to control the power supply of the motor controller 102 to the inverter 107;

[0086] The inverter 107 is used to convert the DC power converted by the motor controller 102 into AC power and control the on and off of the second switch control module 108 according to the AC power consumption instruction to control the inverter 107 to supply power to the AC power device 109 .

[0087] The AC power consumption instruction can be understood as an instruction to supply power to the AC power consumption device 109. It should be noted that at least one AC power consumption device 109 is configured in the electric commercial vehicle. At this time, the DC power converted by the motor controller 102 can be converted into AC power by the inverter 107 and supplied to the AC power consumption device 109, so that the AC power consumption device 109 can work normally. The second switch control module 108 is a relay.

[0088] In the embodiment, the fourth switch control instruction includes a fourth conduction control instruction and a fourth disconnection control instruction. It can be understood that when power is required to be supplied to the AC power device 109, the fourth switch control instruction is the fourth conduction control instruction; correspondingly, when power is not required to be supplied to the AC power device 109, the fourth switch control instruction is the fourth disconnection control instruction. Specifically, when the main controller 101 receives an instruction to supply power to the AC power-consuming device 109, the main controller 101 generates a fourth conduction control instruction and sends the fourth conduction control instruction to the motor controller 102, so that the motor controller 102 controls the connection between the input end and the fourth output end of the first switch control module 103 according to the fourth conduction control instruction, so that the electric energy output by the motor controller 102 can be sent to the inverter 107. After the inverter 107 receives the DC power, the DC power is converted into AC power. Then, the inverter 107 controls the conduction of the second switch control module 108 according to the AC power consumption instruction, so that the inverter 107 and the AC power-consuming device 109 are conducted through the second switch control module 108, so that the inverter 107 can directly supply power to the AC power-consuming device 109.

[0089] Embodiment 5

[0090] Figure 5 It is a structural schematic diagram of an electric commercial vehicle provided in Embodiment 5 of the present invention. Figure 5 is Figure 4 It should be noted that the electric energy output by the motor controller 102 is high-voltage direct current. When powering low-voltage direct current electrical equipment, the direct current output by the motor controller 102 needs to be converted into low-voltage alternating current.

[0091] refer to Figure 5, the electric commercial vehicle further includes: a switching power supply 110, a third switch control module 111 and at least one DC power-consuming device 112;

[0092] The first end of the switch power supply 110 is connected to the fifth output end of the first switch control module 103, the second end of the switch power supply 110 is connected to the input end of the third switch control module 111, and the output end of the third switch control module 111 is connected to the DC power device 112;

[0093] The main controller 101 is used to generate a corresponding fifth switch control instruction according to the DC power consumption instruction, and send the fifth switch control instruction to the motor controller 102;

[0094] The motor controller 102 is used to control the on / off between the input terminal and the fifth output terminal of the first switch control module 103 according to the fifth switch control instruction, so as to control the power supply of the motor controller 102 to the switch power supply 110;

[0095] The switching power supply 110 is used to convert the current voltage DC output by the motor controller 102 into the target voltage DC and control the on and off of the third switch control module 111 according to the DC power consumption instruction to control the switching power supply 110 itself to supply power to the DC power device 112.

[0096] The third switch control module 111 is a relay; the DC power consumption instruction can be understood as an instruction to supply power to the DC power consumption device 112. It should be noted that at least one DC power consumption device 112 is configured in the electric commercial vehicle, and the power supply voltage required by the DC power consumption device 112 is relatively small (generally below 24V). At this time, the high voltage DC power (generally above 220V) converted by the motor controller 102 can be converted into low voltage DC power by the switching power supply 110, and supplied to the DC power consumption device 112, so that the DC power consumption device 112 can work normally.

[0097] In the embodiment, the fifth switch control instruction includes a fifth on control instruction and a fifth off control instruction. It can be understood that when power is required to be supplied to the DC power-consuming device 112, the fifth switch control instruction is the fifth on control instruction; correspondingly, when power is not required to be supplied to the DC power-consuming device 112, the fifth switch control instruction is the fifth off control instruction. Specifically, when the main controller 101 receives an instruction to supply power to the DC power-consuming device 112, the main controller 101 generates a fifth conduction control instruction and sends the fifth conduction control instruction to the motor controller 102, so that the motor controller 102 controls the connection between the input end and the fifth output end of the first switch control module 103 according to the fifth conduction control instruction, so that the electric energy output by the motor controller 102 can be sent to the switching power supply 110. After the switching power supply 110 receives the DC power energy, since the DC power is high-voltage DC power, it is necessary to convert the DC power into low-voltage DC power through the switching power supply 110, and then the switching power supply 110 controls the conduction of the third switch control module 111 according to the DC power consumption instruction sent by the main controller 101, so that the switching power supply 110 and the DC power-consuming device 112 are connected through the third switch control module 111, so that the switching power supply 110 can directly supply power to the DC power-consuming device 112.

[0098] Embodiment 6

[0099] Figure 6 It is a structural schematic diagram of an electric commercial vehicle provided in Example 6 of the present invention. Figure 6 is Figure 5 On the basis of the above, the structure of the electric commercial vehicle is further described. It should be noted that in order for the motor controller 102 to obtain electric energy, the fuel needs to be burned to convert it into corresponding electric energy.

[0100] refer to Figure 6 The electric commercial vehicle further includes: an alcohol fuel tank 113, an internal combustion engine 114 and an ISG motor 115 integrated with starting / generating power; the alcohol fuel tank 113 is connected to the input end of the internal combustion engine 114, the output end of the internal combustion engine 114 is connected to the first end of the ISG motor 115, and the second end of the ISG motor 115 is connected to the input end of the motor controller 102;

[0101] When the main controller 101 receives a vehicle start command, the alcohol fuel in the alcohol fuel tank 113 is input into the internal combustion engine 114 for combustion, and the ISG motor 115 is driven to generate electricity through the power output shaft of the internal combustion engine 114 .

[0102] It should be noted that, in order to ensure fuel cost and reduce environmental pollution, the fuel used by the electric commercial vehicle in this program is alcohol fuel. In an embodiment, an alcohol fuel tank 113, an internal combustion engine 114 and an ISG motor 115 are provided in the electric commercial vehicle. When the main controller 101 receives the vehicle start command, the valve of the alcohol fuel tank 113 is triggered to open, so that the alcohol fuel tank 113 is input into the internal combustion engine 114 by the fuel injection system of the internal combustion engine 114, the internal combustion engine 114 makes the alcohol fuel in the internal fuel, and the internal combustion engine 114 and the ISG motor 115 are through the power output shaft, and the mechanical energy is converted into AC electric energy, and the AC electric energy is sent to the motor controller 102, so that the motor controller 102 converts the AC electric energy into DC electric energy, and supply the drive motor 105, the refrigeration unit 104, the AC power equipment 109 and / or the DC power equipment 112 to work normally, or the redundant electric energy is charged in the power battery 106, to carry out electric energy storage.

[0103] Embodiment 7

[0104] Figure 7 1 is a schematic diagram of a power distribution structure of an electric commercial vehicle provided in Embodiment 7 of the present invention. In the embodiment, the structure of the electric commercial vehicle is described by taking an example in which the electric commercial vehicle is equipped with two AC power devices 109 and two DC power devices 112, and the first switch control module 103, the second switch control module 108 and the third switch control module 111 are all relays.

[0105] refer to Figure 7 The electric commercial vehicle includes: a main controller 101, a motor controller 102, a first switch control module 103, a refrigeration unit 104, a drive motor 105, a power battery 106, an inverter 107, a second switch control module 108, two AC power devices 109 (respectively, an AC power device 1091 and an AC power device 1092), a switching power supply 110, a third switch control module 111, two DC power devices 112 (respectively, a DC power device 1121 and a DC power device 1122), an alcohol fuel tank 113, an internal combustion engine 114, and an ISG motor 115. The connection relationship between these 15 devices is described in the above embodiment and will not be repeated here.

[0106] In the embodiment, the dynamic power distribution of the electric commercial vehicle is described by taking the electric commercial vehicle in the driving process. It can be understood that the motor controller 102 and the drive motor 105 are always in a conductive state. The main controller 101 achieves the purpose of reasonably allocating and using the power of the whole vehicle by combining and switching the first switch control module 103.

[0107] Implementation method 1: The three-phase AC power output by the ISG motor 115 is converted into DC power through the motor controller 102 to meet the driving needs of the vehicle, provide power for the drive motor 105, and charge the excess power into the power battery 106.

[0108] Implementation method 2: The three-phase AC power output by the ISG motor 115 is converted into DC power through the motor controller 102 to meet the driving needs of the vehicle and provide power for the drive motor 105. The excess power is used to power the refrigeration unit 104.

[0109] Implementation method 3: The three-phase AC power output by the ISG motor 115 is converted into DC power through the motor controller 102 to meet the driving requirements of the vehicle and provide power for the drive motor 105 . The excess power is used to power the switching power supply 110 .

[0110] Implementation method 4: The three-phase AC power output by the ISG motor 115 is converted into DC power through the motor controller 102 to meet the driving requirements of the vehicle and provide power for the drive motor 105 . The excess power is used to power the inverter 107 .

[0111] In the embodiment, the inverter 107 implements the power distribution branch to the AC power equipment 109 in the following manner:

[0112] The AC power consumption device 1091 is turned on, and the AC power consumption device 1092 is turned off;

[0113] The AC power consumption device 1091 is turned off, and the AC power consumption device 1092 is turned on;

[0114] The AC power consumption device 1091 is turned on, and the AC power consumption device 1092 is turned on;

[0115] The AC power consuming device 1091 is turned off, and the AC power consuming device 1092 is turned off.

[0116] Of course, when three AC power-consuming devices 109 are configured in an electric commercial vehicle, the power supply configuration can be performed according to whether one, two, or three of them are turned on or off.

[0117] Correspondingly, the switch power supply 111 implements the power distribution branch to the DC power-consuming device 111 as follows:

[0118] The DC power consumption device 1121 is turned on, and the AC power consumption device 1122 is turned off;

[0119] The DC power-consuming device 1121 is turned off, and the AC power-consuming device 1122 is turned on;

[0120] The DC power consumption device 1121 is turned on, and the AC power consumption device 1122 is turned on;

[0121] The DC power-consuming device 1121 is turned off, and the AC power-consuming device 1122 is turned off.

[0122] Of course, when three DC power-consuming devices 111 are configured in an electric commercial vehicle, power supply configuration can be performed according to whether one, two, or three of them are turned on or off.

[0123] Specifically, the power distribution method of the whole vehicle may include: implementation method 1; implementation method 2; implementation method 3 and one of the distribution branches of the switching power supply 110; implementation method 4 and one of the distribution branches of the inverter 107; implementation method 1 and implementation method 2; implementation method 1, implementation method 3 and one of the distribution branches of the switching power supply 110; implementation method 1, implementation method 4 and one of the distribution branches of the inverter 107; implementation method 2, implementation method 3 and one of the distribution branches of the switching power supply 110; implementation method 2, implementation method 4 and one of the distribution branches of the inverter 107; implementation method 3, one of the distribution branches of the switching power supply 110, implementation method 4 and one of the distribution branches of the inverter 107 Implementation method of power branch; implementation method 1 and implementation method 2, implementation method 3 and one of the distribution branches of the switching power supply 110; implementation method 1 and implementation method 2, implementation method 4 and one of the distribution branches of the inverter 107; implementation method 1, implementation method 3, one of the distribution branches of the switching power supply 110, implementation method 4 and one of the distribution branches of the inverter 107; implementation method 2, implementation method 3, one of the distribution branches of the switching power supply 110, implementation method 4 and one of the distribution branches of the inverter 107; implementation method 1, implementation method 2, implementation method 3, one of the distribution branches of the switching power supply 110, implementation method 4 and one of the distribution branches of the inverter 107.

[0124] On the basis of the existing range-extended electric commercial vehicles for alcohol, a DC-to-AC inverter is configured on the electric commercial vehicle to provide high-power industrial frequency power supply for a variety of AC power-consuming equipment; by switching the distribution relays of each power branch, and monitoring the power generation through the main controller, the power consumption time of each power branch is reasonably allocated, and the reasonable switching and start-stop of the power branch is realized, so as to save electric energy and fuel for power generation. At the same time, the power supply of each power-consuming equipment in the power branch is controlled to meet the power demand of alcohol range-extended electric commercial vehicles, especially electric commercial vehicles that are fully loaded and travel long distances, for refrigeration equipment including refrigeration units, refrigeration equipment and other high-power equipment. At the same time, the whole vehicle power of the electric commercial vehicle is reasonably allocated to ensure the power distribution of the electric commercial vehicle's cruising range and refrigeration time in long-distance transportation.

[0125] Embodiment 8

[0126] Figure 8 1 is a schematic diagram of the structure of an electric commercial vehicle provided by Embodiment 8 of the present invention. The diagram illustrates the structure of each device in the electric commercial vehicle in the form of a vehicle.

[0127] refer to Figure 8 A main controller 101, a motor controller 102, an alcohol fuel tank 113, an internal combustion engine 114 and an ISG motor 115 are arranged in the front of the electric commercial vehicle; a refrigeration unit 104, a drive motor 105, a power battery 106, an inverter 107, an AC power device 1091, an AC power device 1092, a switching power supply 110, a DC power device 1121 and a DC power device 1122 are arranged in the box truck of the electric commercial vehicle.

[0128] It should be noted that, according to actual conditions, three or more AC power devices and three or more DC power devices can be configured in an electric commercial vehicle, and there is no limit on the number of AC power devices and DC power devices. Of course, the connection relationship and working process between the various devices can be seen in the specific description of the above embodiment, which will not be repeated here. Figure 8 The first switch control module, the second switch control module and the third switch control module are not shown in the figure.

[0129] Embodiment 9

[0130] Fig. 9 1 is a flow chart of a power supply control method provided in Embodiment 9 of the present invention. The power supply control method provided in this embodiment can be executed by the electric commercial vehicle in the above embodiment. The electric commercial vehicle can be implemented by software and / or hardware.

[0131] It should be noted that the power supply control method of this embodiment is that the main controller 101 determines whether to control the power supply to each device through the motor controller 102 according to the operating parameters sent by each device. It can be understood that the power supply control method is executed by the various devices in the electric commercial vehicle in the above embodiment.

[0132] refer to Fig. 9 , the power supply control method specifically includes the following steps:

[0133] S210. Receive current refrigeration parameters sent by the refrigeration unit.

[0134] The current refrigeration parameters can be understood as the current operating parameters of the refrigeration unit 104. It should be noted that in order to monitor the current refrigeration parameters of the refrigeration unit 104 in real time, a monitoring sensor is configured in the refrigeration unit 104, and the monitoring sensor is used to monitor and collect the current refrigeration parameters of the refrigeration unit 104, and send the collected current refrigeration parameters to the main controller 101. After the main controller 101 receives the current refrigeration parameters of the refrigeration unit 104, the main controller 101 analyzes and processes the current refrigeration parameters to determine whether to supply power to the refrigeration unit 104.

[0135] It should be noted that before the electric commercial vehicle is started, the main controller 101 calculates the total driving time required for the vehicle and the total power required for driving according to the three factors of vehicle loading weight, route planning and vehicle speed; at the same time, the main controller 101 sets the refrigeration unit information, for example, according to the properties of the transported goods, the storage temperature range and other parameters are set, and the main controller 101 converts the total power required for refrigeration of the transported goods through the calculated vehicle driving time. Among them, the total power consumption of the electric commercial vehicle is the sum of the total power required for driving and the total power required for refrigeration of the transported goods. After the total power consumption of the electric commercial vehicle is calculated, the total amount of alcohol fuel required to be carried by the electric commercial vehicle is calculated according to the total power consumption of the electric commercial vehicle, so as to achieve that before the alcohol fuel is used up, both the refrigeration of the transported goods can be guaranteed and the destination can be reached.

[0136] S220. Generate a corresponding first switch control instruction according to the current refrigeration parameters.

[0137] The first switch control instruction is used to control the on-off between the motor controller 102 and the refrigerating unit 104. In an embodiment, the first switch control instruction may include a first disconnection control instruction and a first conduction control instruction. In an embodiment, when power is required to be supplied to the refrigerating unit 104, the first switch control instruction is a first conduction control instruction; correspondingly, when power is not required to be supplied to the refrigerating unit 104, the first switch control instruction is a first disconnection control instruction.

[0138] S230, sending the first switch control instruction to the motor controller, so that the motor controller controls the motor controller itself to supply power to the refrigeration unit according to the first switch control instruction.

[0139] The first switch control module 103 is a power distribution relay. In the embodiment, if the refrigeration unit 104 needs to be powered, the main controller 101 generates a first conduction control instruction, and sends the first conduction control instruction to the motor controller 102, so that the motor controller 102 controls the connection between the input end and the first output end of the first switch control module 103 according to the first conduction control instruction, so that the electric energy output by the motor controller 102 can be supplied to the refrigeration unit 104 through the first switch control module 103; if the refrigeration unit 104 does not need to be powered, the main control 101 generates a first disconnection control instruction, and sends the first disconnection control instruction to the motor controller 102, so that the motor controller 102 controls the connection between the input end and the first output end of the first switch control module 103 according to the first disconnection control instruction, so that the motor controller 102 cannot supply the output electric energy to the refrigeration unit 104.

[0140] The technical solution of this embodiment is to dynamically allocate the total power required for driving and the total power required for refrigerating goods through the main controller during vehicle driving, and to manage the charging and discharging of the extended-range electric commercial vehicle through the distribution relay, so as to achieve the purpose of long driving range, energy saving and efficient refrigeration of the extended-range electric commercial vehicle.

[0141] Based on the above embodiment, step S220 may specifically include steps S2201-S2203:

[0142] S2201. Extract the current refrigeration temperature from the current refrigeration parameters.

[0143] It should be noted that in order to facilitate the determination of whether to supply power to the refrigeration unit 104, the current refrigeration temperature of the refrigeration unit can be monitored. The current refrigeration temperature can be understood as the temperature value of the space where the goods transported in the electric commercial vehicle are located. In the embodiment, after the main controller 101 receives the current refrigeration parameters sent by the refrigeration unit 104, the main controller 101 identifies and obtains the current refrigeration temperature in the current refrigeration parameters to determine the generated first switch instruction.

[0144] S2202: If the current refrigeration temperature is lower than a preset refrigeration temperature threshold, a first disconnection control instruction is generated.

[0145] Among them, the preset refrigerated temperature threshold is related to the properties of the transported goods. In an embodiment, the properties of the transported goods refer to the inherent characteristics of the transported goods. In order to avoid damage to the transported goods, the preset refrigerated temperature threshold must be determined based on the properties of the transported goods. For example, if the transported goods are ordinary fruits and vegetables, the preset refrigerated temperature threshold can be set between 1-8°C; for another example, if the transported goods are tropical or subtropical fruits, the preset refrigerated temperature threshold can be set between 3-10°C; for another example, if the transported goods are frozen foods (such as ice cream or quick-frozen foods), the preset refrigerated temperature threshold can be set between minus 10 and minus 2 degrees Celsius. Of course, different transported goods require different preset refrigerated temperature thresholds, which can be specifically defined according to the actual transported goods.

[0146] In an embodiment, when the current refrigeration temperature is lower than the preset refrigeration temperature threshold, it indicates that the temperature of the space where the transported goods are located meets the standard. At this time, the main controller 101 can generate a first disconnection control instruction to disconnect the connection between the motor controller 102 and the refrigeration unit 104.

[0147] S2203: If the current refrigeration temperature is higher than the preset refrigeration temperature threshold, generate a first conduction control instruction.

[0148] In an embodiment, when the current refrigeration temperature is higher than the preset refrigeration temperature threshold, it indicates that the temperature of the space where the transported goods are located does not meet the standards. In order to ensure the freshness of the transported goods, the main controller 101 can generate a first conduction control instruction to connect the motor controller 102 and the refrigeration unit 104.

[0149] It should be noted that the refrigeration units in the technical solutions of Embodiments 1 to 9 are high-power DC power-consuming devices. It can be understood that the motor controller 102 can also directly supply power to other high-power DC power-consuming devices, such as DC fans, DC motors, etc. It should be understood that the technical solution of the present invention can also be applied to other vehicles. For example, when the electric commercial vehicle is a motorhome, the high-power DC power-consuming devices can be household appliances such as DC fans and DC motors, and the high-power AC power-consuming devices can be household appliances such as televisions, washing machines, and refrigerators. The technical solution can also be used to dynamically adjust the power supply of each power-consuming device.

[0150] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", 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 invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0151] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. An electric commercial vehicle, characterized in that: include: A main controller, a motor controller, a first switch control module and a refrigeration unit; The main controller is connected to the motor controller for communication, the output end of the motor controller is connected to the input end of the first switch control module, and the refrigeration unit is connected to the first output end of the first switch control module; The main controller is used to generate a corresponding first switch control instruction according to the current refrigeration parameters of the refrigeration unit, and send the first switch control instruction to the motor controller; The motor controller is used to control the on / off between the input terminal and the first output terminal of the first switch control module according to the first switch control instruction, so as to control the power supply of the motor controller itself to the refrigeration unit; The first switch control module is a power distribution relay, and the main controller is also used to dynamically distribute the total power required for driving and the total power required for refrigerating goods, and to manage the charging and discharging of the electric commercial vehicle through the power distribution relay; It also includes: a driving motor, the driving motor is connected to the second output terminal of the first switch control module; The main controller is used to generate a corresponding second switch control instruction according to the vehicle start-stop instruction, and send the second switch control instruction to the motor controller; The motor controller is used to control the on / off between the input terminal and the second output terminal of the first switch control module according to the second switch control instruction, so as to control the power supply of the motor controller itself to the drive motor; It also includes: a power battery, the power battery is connected to the third output terminal of the first switch control module; The main controller is used to generate a corresponding third switch control instruction according to the energy storage instruction, and send the third switch control instruction to the motor controller; The motor controller is used to control the on / off between the input end of the first switch control module and the third output end according to the third switch control instruction, so as to control the power supply of the motor controller itself to the power battery; It also includes: an alcohol fuel tank, an internal combustion engine and an ISG motor integrated with starting / generating power; the alcohol fuel tank is connected to the input end of the internal combustion engine, the output end of the internal combustion engine is connected to the first end of the ISG motor, and the second end of the ISG motor is connected to the input end of the motor controller; When the main controller receives the vehicle start command, it triggers to open the valve of the alcohol fuel tank. The alcohol fuel tank inputs the alcohol fuel into the internal combustion engine through the fuel injection system of the internal combustion engine. The internal combustion engine burns the alcohol fuel internally. At the same time, the internal combustion engine and the ISG motor convert mechanical energy into AC electrical energy through the power output shaft, and send the AC electrical energy to the motor controller. The motor controller converts the AC electrical energy into DC electrical energy and supplies it to the drive motor, refrigeration unit, AC electrical equipment and / or DC electrical equipment for normal operation, or charges the excess electrical energy into the power battery for electrical energy storage.

2. The electric commercial vehicle according to claim 1, characterized in that: Also includes: An inverter, a second switch control module and at least one AC power-consuming device; The first end of the inverter is connected to the fourth output end of the first switch control module, the second end of the inverter is connected to the input end of the second switch control module, and the output end of the second switch control module is connected to the AC power device; The main controller is used to generate a corresponding fourth switch control instruction according to the AC power usage instruction, and send the fourth switch control instruction to the motor controller; The motor controller is used to control the on / off between the input terminal and the fourth output terminal of the first switch control module according to the fourth switch control instruction, so as to control the power supply of the motor controller itself to the inverter; The inverter is used to convert the direct current converted by the motor controller into alternating current, and control the on and off of the second switch control module according to the AC power consumption instruction to control the inverter itself to supply power to the AC power consumption equipment.

3. The electric commercial vehicle according to claim 1, characterized in that: Also includes: A switching power supply, a third switch control module and at least one DC power-consuming device; The first end of the switching power supply is connected to the fifth output end of the first switch control module, the second end of the switching power supply is connected to the input end of the third switch control module, and the output end of the third switch control module is connected to the DC power device; The main controller is used to generate a corresponding fifth switch control instruction according to the DC power consumption instruction, and send the fifth switch control instruction to the motor controller; The motor controller is used to control the on / off between the input terminal and the fifth output terminal of the first switch control module according to the fifth switch control instruction, so as to control the power supply of the motor controller itself to the switch power supply; The switching power supply is used to convert the current voltage DC output by the motor controller into the target voltage DC, and control the on and off of the third switch control module according to the DC power consumption instruction to control the switching power supply itself to supply power to the DC power-consuming device.

4. A power supply control method for controlling the electric commercial vehicle according to any one of claims 1 to 3, characterized in that: include: Receive current refrigeration parameters sent by the refrigeration unit; Generate a corresponding first switch control instruction according to the current refrigeration parameter; The first switch control instruction is sent to the motor controller, so that the motor controller controls the motor controller itself to supply power to the refrigeration unit according to the first switch control instruction.

5. The method according to claim 4, characterized in that The generating a corresponding switch control instruction according to the current refrigeration parameter comprises: Extracting the current refrigeration temperature from the current refrigeration parameters; If the current refrigeration temperature is lower than the preset refrigeration temperature threshold, generating a first disconnection control instruction; If the current refrigeration temperature is higher than the preset refrigeration temperature threshold, a first conduction control instruction is generated.

6. The method according to claim 5, characterized in that The preset refrigeration temperature threshold is related to the properties of the transported goods.

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