WO2020007361A9

WO2020007361A9 - Control method for power assembly heat exchange system, power assembly heat exchange system, and vehicle

Info

Publication number: WO2020007361A9
Application number: PCT/CN2019/094862
Authority: WO
Inventors: 袁振宇
Original assignee: 比亚迪股份有限公司
Priority date: 2018-07-05
Filing date: 2019-07-05
Publication date: 2021-07-29
Also published as: WO2020007361A1; CN110686546A; CN110686546B

Abstract

A control method for a power assembly heat exchange system, a power assembly heat exchange system, and a vehicle. The power assembly heat exchange system comprises: a power assembly, a heat exchange pump, and a heat exchanger. The control method comprises the following steps: starting the heat exchange pump; determining the temperature of the power assembly and, on the basis of the temperature of the power assembly, generating a first signal for controlling the speed of the heat exchange pump; determining the speed of rotation of the power assembly and, on the basis of the speed of rotation of the power assembly, generating a second signal for controlling the speed of the heat exchange pump; and selecting the speed of the heat exchange pump: comparing the speed of the heat exchange pump corresponding to the first signal with the speed of the heat exchange pump corresponding to the second signal, and operating the heat exchange pump at the higher of the two speeds.

Description

Control method of electric assembly heat exchange system, electric assembly heat exchange system and vehicle

This application requires the priority of a Chinese patent application filed with the Chinese Patent Office on July 5, 2018, the application number is 201810729011.1, and the application title is "Control method of electric assembly heat exchange system, electric assembly heat exchange system and vehicle" , Its entire content is incorporated into this application by reference.

Technical field

This application relates to the technical field of motor heat dissipation, and specifically to a control method of an electric assembly heat exchange system, an electric assembly heat exchange system, and a vehicle.

Background technique

The heat exchange system of the electric assembly of the vehicle cools the electric assembly through the electric water pump driving the heat exchange medium. In the cooling project, the electric water pump outputs a certain power, and when the electric water pump is damaged, the electric assembly continues to work and it is easy to produce electric power. The problem of assembly overheating.

In the related technology, the electric water pump in the cooling system of the vehicle has a fixed rotation speed, and the rotation speed cannot be adjusted. The mechanical loss and heat transfer loss are large. In the cooling system, the water pump does not have a fault alarm function, and the cause of the water pump failure cannot be determined.

Summary of the invention

This application aims to solve at least one of the technical problems existing in the prior art. For this reason, this application proposes a control of the heat exchange system of the electric assembly that can control the rotation speed of the cooling pump in real time according to the temperature and rotation speed of the electric assembly, which can ensure that the electric assembly works in the optimal temperature range and realize the efficient operation of the cooling system. method.

This application also proposes an electric assembly heat exchange system.

This application also proposes a vehicle.

According to the control method of the electric assembly heat exchange system of the present application, the electric assembly heat exchange system includes: the electric assembly heat exchange system includes: an electric assembly, a heat exchange pump, a heat exchanger, and the heat exchange system The first port is connected to the first port of the heat exchange part of the electric assembly, and the second port of the heat exchange part of the electric assembly is connected to the first port of the heat exchanger. The second port is connected to the second port of the heat exchange pump, and the heat exchange pump has a plurality of gears; the control method includes the following steps: the temperature of the electric assembly is judged, and based on the temperature of the electric assembly, generating the The first signal of the heat exchange pump gear position, the magnitude of the first signal corresponds to the height of the heat exchange pump gear position; the electric assembly rotation speed determination, according to the electric assembly rotation speed, is generated for controlling the heat exchange pump The second signal of the gear position, the magnitude of the second signal corresponds to the height of the gear position of the heat exchange pump; for gear selection, the gear position of the heat exchange pump corresponding to the first signal is compared with the second signal Corresponding to the gear position of the heat exchange pump, and make the heat exchange pump run in a high gear position among the two gear positions.

According to the control method of the electric assembly heat exchange system of the present application, through the step of determining the temperature of the electric assembly, the determination of the rotation speed of the electric assembly, and the step selection of gears, the heat exchange pump can drive the circulation of the heat exchange medium in a suitable gear. In turn, the electric assembly can work in the optimal temperature range to realize the efficient work of the heat exchange system.

The electric assembly heat exchange system according to the present application includes: an electric assembly, a heat exchange pump, a heat exchanger, a motor controller, a heat exchange pump controller, a motor temperature sensor, and a motor speed sensor; wherein the first port of the heat exchange pump Is connected to the first port of the heat exchange part of the electric assembly, the second port of the heat exchange part of the electric assembly is connected to the first port of the heat exchanger, and the second port of the heat exchanger Connected to the second port of the heat exchange pump, the heat exchange pump has a plurality of gears, the motor controller is electrically connected to the electric assembly, and the heat exchange pump controller is electrically connected to the heat exchange pump; The motor controller is used to collect the temperature and speed of the electric assembly; the heat exchange pump controller is used to process the temperature of the electric assembly and the temperature of the heat exchange medium; the motor temperature sensor is used to detect the temperature of the electric assembly Into the temperature; the motor speed sensor is used to detect the speed of the electric assembly.

The electric assembly heat exchange system according to the present application includes the above-mentioned components, so that the control method of the electric assembly heat exchange system according to the present application can be executed.

The vehicle according to the present application includes the electric assembly heat exchange system according to the present application.

The vehicle according to the present application is provided with the electric assembly heat exchange system described in the present application, so that the vehicle-to-electric assembly can work in the best operating temperature range, and the heat exchange system can work efficiently, thereby enabling the vehicle to have The corresponding advantages.

The additional aspects and advantages of the present application will be partially given in the following description, and some will become obvious from the following description, or be understood through the practice of the present application.

Description of the drawings

The above and/or additional aspects and advantages of the present application will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, in which:

Fig. 1 is a schematic structural diagram of an electric assembly heat exchange system according to an embodiment of the present application;

Fig. 2 is a schematic structural diagram of a motor controller according to an embodiment of the present application;

Fig. 3 is a schematic structural diagram of a heat exchange pump controller according to an embodiment of the present application;

Fig. 4 is a flowchart of a control method of an electric assembly heat exchange system according to an embodiment of the present application;

Fig. 5 is a flowchart of a control method of an electric assembly heat exchange system according to another embodiment of the present application.

Reference signs:

Electric assembly heat exchange system 100;

Electric assembly 1; heat exchange pump 2; heat exchanger 3; motor temperature sensor controller 4; motor speed sensor 5; heat exchange medium temperature sensor 6; communication line 7; vehicle cooling pipeline 8; heat exchange pump controller 9; Motor controller 10; display screen 11; temperature processing module 12; rotational speed processing module 13; self-checking module 14; fault alarm module 15; gear selection module 16.

Detailed ways

The embodiments of the present application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the drawings are exemplary, and are only used to explain the present application, and should not be construed as a limitation to the present application.

The control method of the electric assembly heat exchange system 100 according to an embodiment of the present application will be described below with reference to FIGS. 1 to 5.

As shown in Figures 1 to 5, the electric assembly heat exchange system 100 according to the embodiments of the present application includes: electric assembly 1, heat exchange pump 2, heat exchanger 3, motor controller 10, heat exchange pump controller 9, and Heat medium temperature sensor 6, motor temperature sensor 4, motor speed sensor 5.

The electric assembly 1 can include a heat exchange part, which can be integrated on the shell of the electric assembly 1, or the gap between the rotor and the stator of the electric assembly 1 forms the heat exchange part, and the heat exchange part can be connected to the heat exchange part. Heat medium, the first port of the heat exchange pump 2 is connected to the first port of the heat exchange part of the electric assembly 1, and the second port of the heat exchange part of the electric assembly 1 is connected to the first port of the heat exchanger 3. The second port of the device 3 is connected to the second port of the heat exchange pump 2.

The first port of the heat exchange pump 2 may be an outlet, the second port of the heat exchange pump 2 may be an inlet, the first port of the heat exchange part of the electric assembly 1 may be an inlet, and the second port of the heat exchange part of the electric assembly 1 It may be an outlet, the first port of the heat exchanger 3 may be an inlet, and the second port of the heat exchanger 3 may be an outlet.

Thus, the heat exchange part of the electric assembly 1, the heat exchanger 3, and the heat exchange pump 2 form a loop through which the heat exchange medium is introduced. The heat exchange pump 2 is used to drive the heat exchange medium to circulate in the loop, and the heat exchanger 3 is used To cool the heat exchange medium flowing out of the second end of the heat exchange part of the electric assembly 1, the heat exchange pump 2 can pass the cooled heat exchange medium from the first end of the heat exchange part of the electric assembly 1 into the electric assembly 1. The heat exchange part becomes 1 and the cycle starts again.

The heat exchange medium temperature sensor 6 is used to detect the temperature of the heat exchange medium in the heat exchange section of the electric assembly 1, the motor temperature sensor 4 is used to detect the temperature of the electric assembly 1, and the motor speed sensor 5 is used to detect the temperature of the electric assembly 1. Rotating speed.

In some examples, as shown in FIG. 2, the motor controller 10 includes a temperature processing module 12 and a rotation speed processing module 13.

In some examples, as shown in FIG. 3, the heat exchange pump controller 9 includes a self-checking module 14, a fault alarm module 15 and a gear selection module 16.

The motor controller 10 is used to collect real-time information such as the temperature and motor speed of the electric assembly 1 and generate signals to transmit to the heat exchange pump controller 9. The heat exchange pump controller 9 is used to process the signals transmitted by the motor controller to achieve exchange Control of the 2nd gear of the heat pump. In some examples, the heat exchanger 3 can also be connected to the vehicle cooling pipeline 8. The heat exchanger 3 can not only exchange heat for the electric assembly heat exchange system 100, but also exchange heat for other parts of the vehicle. The hot side inlet of the heat exchanger 3 can be connected with the outlet of the electric assembly 1, the hot side outlet of the heat exchanger 3 can be connected with the inlet of the heat exchange pump, and the cold side inlet and the cold side outlet of the heat exchange part 3 can be cooled with the whole vehicle The pipeline 8 is connected.

In some examples, the electric assembly heat exchange system 100 may further include a display screen 11, which may be used to display the working status of the electric assembly 1 and the heat exchange pump 2, for example, the temperature of the electric assembly 1 and the electric assembly 1. The speed of the heat exchange pump 2, the current of the heat exchange pump 2, the voltage of the heat exchange pump 2, the speed of the heat exchange pump 2, etc. The display screen 11 can also display the output signal of the self-check of the heat exchange pump 2 in the control method of the electric assembly heat exchange system 100, that is, Whether the heat pump 2 is faulty or whether the heat exchange pump 2 communication is faulty, etc., the setting of the display screen 11 can facilitate the operator to view the working status of the electric assembly heat exchange system 100 from the display screen 11.

The heat exchange pump 2 can have multiple gears, the motor controller 10 is electrically connected to the electric assembly 1, and the heat exchange pump controller 9 is electrically connected to the heat exchange pump 2.

The power of the heat exchange pump 2 of multiple gears is different, that is, when the heat exchange pump 2 is in the low gear, the speed of the heat exchange pump 2 is slower, the flow rate of the heat exchange medium is slow, and the heat exchange medium circulation of the heat exchange system 100 is slower , The heat exchange efficiency of the heat exchange system 100 is low. When the heat exchange pump 2 is in the high gear, the speed of the heat exchange pump 2 is faster, the flow rate of the heat exchange medium is faster, and the heat exchange medium of the heat exchange system 100 circulates faster. The heat exchange efficiency of the heat exchange system 100 is relatively high.

The electric assembly heat exchange system 100 according to the present application can execute the control method of the electric assembly heat exchange system 100 according to the present application by providing the above-mentioned components.

The vehicle according to the present application includes the electric assembly heat exchange system 100 according to the present application, so that the vehicle-to-electric assembly 1 can work in an optimal operating temperature range, and the heat exchange system 100 can work efficiently, thereby enabling the vehicle Has corresponding advantages.

The control method of the above-mentioned electric assembly heat exchange system 100 is described below.

As shown in FIG. 4, the control method of the electric assembly heat exchange system 100 includes the following steps: starting of the heat exchange pump, determining the temperature of the electric assembly, determining the rotation speed of the electric assembly, and selecting the gear position.

After the step heat exchange pump is started, the step electric assembly temperature judgment and the step electric assembly speed judgment can be carried out, and the step electric assembly temperature judgment and the step electric assembly speed judgment can be carried out in parallel.

As shown in Figure 5, the step of determining the temperature of the electric assembly 1 includes generating a first signal for controlling the gear position of the heat exchange pump 2 according to the temperature of the electric assembly 1. The magnitude of the first signal corresponds to the height of the gear position of the heat exchange pump 2. , The heat exchange pump 2 can work in different gears according to the first signal. When the temperature of the electric assembly 1 is low, the heat exchange pump 2 corresponding to the first signal output by the step electric assembly temperature judgment output is lower. , When the temperature of the electric assembly 1 is high, the first signal corresponding to the first signal output by the step electric assembly temperature judgment output is higher in the gear position of the heat exchange pump 2, and the gear position of the heat exchange pump 2 corresponding to the first signal is higher than the electric assembly temperature. The temperature is positively correlated to 1.

Steps: The determination of the speed of the electric assembly 1 includes generating a second signal for controlling the gear position of the heat exchange pump 2 according to the speed of the electric assembly 1. The magnitude of the second signal corresponds to the gear position of the heat exchange pump 2, and the heat exchange pump 2 can be based on the The two signals work in different gears. When the speed of the electric assembly 1 is low, the second signal of the electric assembly speed judgment output corresponds to the lower gear of the heat exchange pump 2. When the rotation speed is high, the gear position of the heat exchange pump 2 corresponding to the second signal output from the step electric assembly rotation speed determination output is higher, and the gear position of the heat exchange pump 2 corresponding to the second signal is positively correlated with the rotation speed of the electric assembly 1.

The step gear selection includes comparing the gear position of the heat exchange pump 2 corresponding to the first signal with the gear position of the heat exchange pump 2 corresponding to the second signal, and making the heat exchange pump 2 operate in the high gear of the two gears. When the gear position corresponding to the first signal and the gear position corresponding to the second signal are different, the heat exchange pump 2 operates at the higher gear position; when the gear position corresponding to the first signal is the same as the gear position corresponding to the second signal , The heat exchange pump 2 works in the gear position corresponding to the first signal or the gear position corresponding to the second signal.

According to the control method of the electric assembly heat exchange system 100 of the embodiment of the present application, the temperature of the electric assembly 1 is judged, the rotational speed of the electric assembly is judged, and the step gear is selected, so that the heat exchange pump can drive the heat exchange in an appropriate gear. The circulation of the medium enables the electric assembly 1 to work in an optimal temperature range, thereby realizing the efficient operation of the heat exchange system 100.

In some embodiments, after the heat exchange pump is started and before the step of determining the temperature of the electric assembly and the step of determining the rotation speed of the electric assembly, the step further includes the steps: heat exchange pump self-check, communication failure check, step heat exchange pump self-check and step communication failure check Can be done in parallel.

Steps: The communication fault check includes detecting whether the communication line 7 of the heat exchange system 100 is faulty. If the communication of the heat exchange pump 2 fails, the heat exchange pump 2 runs at the highest gear.

Steps: The heat exchange pump self-test includes the steps: detecting the current, voltage, and speed of the heat exchange pump 2. When at least one of the current, voltage, and speed of the heat exchange pump 2 is not within the predetermined range, it can be determined that the heat exchange pump 2 is faulty, and the electric assembly The heat exchange system 100 can issue a fault alarm and shut down.

In some examples, the predetermined range of the voltage U of the heat exchange pump 2 self-test can be: 10V≥U≥50V; the predetermined range of the current I of the heat exchange pump 2 self-test can be: 40A>I; the speed of the heat exchange pump 2 self-test The predetermined range of n2 can be: n2>500r/min, when the voltage U of the heat exchange pump 2, the current I of the heat exchange pump 2 and the speed n2 of the heat exchange pump 2 detected by the self-check of the heat exchange pump 2 are all within the above range, then It is judged that the heat exchange pump 2 is not faulty. When the voltage U of the heat exchange pump 2, the current I of the heat exchange pump 2 and the speed n2 of the heat exchange pump 2 detected by the self-check of the step heat exchange pump 2 is not in the above range, it is judged The heat exchange pump 2 is faulty.

Therefore, when the heat exchange pump 2 has no failure and the communication fails, the heat exchange pump 2 can operate at the highest gear, so that the heat exchange system 100 can work with sufficient power when the communication fails, and the heat exchange system can be prevented 100 is damaged due to insufficient heat dissipation. When the heat exchange part fails, the electric assembly heat exchange system 100 shuts down, which can prevent the heat exchange system 100 from overheating due to the failure of the heat exchange pump 2 while the electric assembly 1 continues to work. Damage to equipment or accidents. When the communication is not faulty and the heat exchange pump 2 is not faulty, the steps can be performed to start the heat exchange pump 2.

In some embodiments, before starting the heat exchange pump, the step further includes the step of determining the temperature of the medium. The step determining the temperature of the medium includes detecting the temperature t2 of the heat exchange medium in the heat exchange part of the electric assembly 1, and detecting the temperature t2 of the heat exchange medium in the heat exchange part. The temperature t2 is compared with the set temperature T3, if t2≥T3, enter the step heat exchange pump 2 to start.

In this way, the heat exchange system 100 can determine whether the heat exchange system 100 needs cooling based on the detection of the temperature of the cooling medium, so as to prevent the heat exchange pump 2 from working when the heat exchange system 100 does not need to be cooled, thereby saving power and reducing Energy consumption of the heat exchange system 100.

In some examples, the step of determining the temperature of the medium may also include the step of self-checking of the heat exchange pump. If at least one of the current, voltage, and speed of the heat exchange pump 2 is not within the predetermined range, it may be determined that the heat exchange pump 2 is faulty, and the electric main If the heat exchange system 100 fails, then the step medium temperature judgment is performed if the heat exchange pump 2 is not faulty. This can prevent the heat exchange system 100 from starting up when the heat exchange pump 2 is damaged, and component damage or accidents caused by overheating of the heat exchange system 100 happened.

In some embodiments, in the step medium temperature judgment, if t2<T3, return to step heat exchange pump 2 self-test, so that the heat exchange pump 2 can be tested before the heat exchange pump 2 starts, thereby ensuring the heat exchange system 100 Reliability.

In some embodiments, the heat exchange pump 2 may have a first gear, a second gear, and a third gear, wherein the power of the heat exchange pump 2 gradually increases from the first gear to the third gear, that is, the heat exchange pump 2 is in the first gear. The power of the heat exchange pump 2 in the second gear is higher than that of the first gear, which is the middle gear; the power of the heat exchange pump 2 in the third gear is the highest, which is the high gear. The heat exchange pump 2 can work in these three gears (that is, with three different powers). The step of determining the temperature of the electric assembly 1 includes: if the temperature of the electric assembly 1 is t1 ≤ T1, the heat exchange pump corresponding to the first signal The 2nd gear is the first gear; if the temperature of the electric assembly 1 is T1<t1＜T2, the heat exchange pump 2 gear corresponding to the first signal is the second gear; if the temperature of the electric assembly 1 is t1≥T2, the first signal The corresponding heat exchange pump 2 gear is the third gear; among them, T1 is the first preset temperature, T2 is the second preset temperature, and T1<T2, so the heat exchange pump 2 can be selected according to the temperature of the electric assembly 1. The working power of the heat pump 2 can further save energy.

In some examples, the first preset temperature T1 and the second preset temperature T2 may satisfy: 60°C≥T1≥80°C, 120°C≥T2≥100°C, for example, when T1=70°C, T2=110°C , When the temperature t1 of the electric assembly 1 is ≤70℃, the gear corresponding to the first signal is the first gear, and when the temperature of the electric assembly 1 is 70℃≤t1≤110℃, the gear corresponding to the first signal is In the second gear, when the temperature t1 of the electric assembly 1 is greater than or equal to 110°C, the gear corresponding to the first signal is the third gear.

In some embodiments, the heat exchange pump 2 may have a first gear, a second gear, and a third gear. The step of determining the rotation speed of the electric assembly 1 includes: if the rotation speed of the electric assembly 1 is n≤N1, the second signal corresponds to the The heat pump 2 gear is the first gear; if the speed of the electric assembly 1 is N1<n<N2, the heat exchange pump 2 gear corresponding to the second signal is the second gear; if the speed of the electric assembly 1 is n≥N2, the second The heat exchange pump 2 gear position corresponding to the signal is the third gear; among them, N1 is the first preset speed, N2 is the second preset speed, and N1<N2, so the heat exchange pump 2 can be selected according to the speed of the electric assembly 1 The working power of the heat exchange pump 2 can further save energy.

In some examples, the first preset speed N1 and the second preset speed N2 may satisfy: 3500r/min≥N1≥ 4500r/min, 5500r/min≥N2≥6500r/min, for example when N1=4000r/min , N2=6000r/min, when the speed of electric assembly 1 is n≤4000r/min, the gear corresponding to the second signal is the first gear, when the speed of electric assembly 1 is 4000r/min≤n≤6000r/min When the gear position corresponding to the second signal is the second gear, when the temperature of the electric assembly 1 is n≥6000r/min, the gear position corresponding to the second signal is the third gear.

In some examples, the step electric assembly 1 temperature judgment and the step electric assembly 1 speed judgment can be carried out in parallel, and after the above two judgment steps are completed, the step gear selection can be carried out.

The control method of the electric assembly heat exchange system 100 according to an embodiment of the present application will be described below with reference to FIG. 4.

The control method of the electric assembly heat exchange system 100 includes the following steps:

Power-on.

The heat exchange pump self-check, if the result of the heat exchange pump self-check step is that the heat exchange pump 2 is faulty, the electric assembly heat exchange system 100 is shut down and a fault alarm can be displayed on the display screen 11.

If the self-check result of the step heat exchange pump is that the heat exchange pump 2 is normal, then the step medium temperature judgment can be performed.

The step medium temperature judgment can detect the temperature of the heat exchange medium. If the result of the step medium temperature judgment is that the medium temperature t2 is not within the set range, you can return to the step heat exchange pump self-check. For example, the step medium temperature judgment result is that the medium temperature t2 is set Within a certain range, step heat exchange pump 2 can be started.

After step heat exchange pump 2 is started, step heat exchange pump self-check and step communication failure check can be performed. Step heat exchange pump self-check and step communication failure check can be performed in parallel. When the detection result is a communication failure, heat exchange pump 2 can be in the highest gear. Work to prevent insufficient cooling of the heat exchange system 100 caused by inaccurate information transmission of the heat exchange pump 2. When the detection result is that the heat exchange pump 2 is faulty, the electric assembly heat exchange system 100 shuts down, and when the detection result is that the communication is normal and the heat exchange pump 2 If it is normal, proceed to the steps of determining the temperature of the electric assembly and determining the rotation speed of the electric assembly.

The step electric assembly temperature judgment and the step electric assembly speed judgment can be performed in parallel. The step electric assembly 1 temperature judgment can output the first signal, and the step electric assembly 1 speed judgment can output the second signal. A temperature of 1 corresponds to different heat exchange pump 2 gear positions (that is, the first signal), and the speed of the electric assembly 1 in different situations corresponds to different heat exchange pump 2 gear positions (that is, the second signal). After the temperature judgment and the step electric assembly speed judgment are completed, the step gear selection can be carried out.

Step gear selection can compare the gear position of the heat exchange pump 2 corresponding to the first signal with the gear position of the heat exchange pump 2 corresponding to the second signal, and run the heat exchange pump 2 in the relatively higher one of the two gear positions, thereby It can be ensured that the heat exchange pump 2 can cool the electric assembly 1 with sufficient power.

After the step gear is selected, you can return to step heat exchange pump 2 to start, and start a new round of control process from step heat exchange pump 2 to start.

After the heat exchange pump 2 runs in a higher gear for a period of time, it can return to the step of medium temperature judgment, so that the control method of the electric assembly heat exchange system is closed-loop control, so that the electric assembly heat exchange system can be turned on. It keeps working condition all the time, real-time monitoring and control of the electric assembly heat exchange system can ensure the heat exchange effect of the electric assembly heat exchange system on the electric assembly 1.

This application aims to solve at least one of the technical problems existing in the prior art. For this reason, this application proposes a control method for the heat exchange system of the electric assembly that controls the rotation speed of the cooling pump in real time according to the temperature and rotation speed of the electric assembly, which can ensure that the electric assembly works in the optimal temperature range and realize the efficient operation of the cooling system. .

This application also proposes an electric assembly heat exchange system.

This application also proposes a vehicle.

In an embodiment of the present application, before the step of determining the temperature of the electric assembly and the step of determining the rotation speed of the electric assembly, the method further includes: starting the heat exchange pump.

In an embodiment of the present application, after the heat exchange pump is started, the step further includes: heat exchange pump self-checking, detecting the current, voltage, and speed of the heat exchange pump, and in the current, voltage, and speed of the heat exchange pump. When at least one is not within the predetermined range, a fault alarm is issued and the machine stops.

In an embodiment of the present application, after the heat exchange pump is started, the step further includes: communication failure check, detecting the communication failure of the heat exchange pump, and if the heat exchange pump communication fails, the heat exchange pump is set to the highest gear run.

In an embodiment of the present application, before starting the heat exchange pump, the step further includes: medium temperature judgment, judging the temperature t2 of the heat exchange medium in the heat exchange part of the electric assembly, if t2≥T3, enter the step to change The heat pump starts.

In an embodiment of the present application, before the medium temperature is judged, it further includes a heat exchange pump self-check, and if at least one of the current, voltage, and speed of the heat exchange pump is not within a predetermined range, a fault alarm is issued.

In an embodiment of the present application, in the step of determining the temperature of the medium, if t2<T3, return to the step of heat exchange pump self-test.

In an embodiment of the present application, the heat exchange pump has a first gear, a second gear, and a third gear, and the step of determining the temperature of the electric assembly includes: if the temperature of the electric assembly is t1≤T1, The heat exchange pump gear corresponding to the first signal is the first gear; if the temperature of the electric assembly T1<t1<T2, the heat exchange pump gear corresponding to the first signal is the second gear; if The temperature t1 of the electric assembly is greater than or equal to T2, and the heat exchange pump gear corresponding to the first signal is the third gear; where T1 is the first preset temperature, T2 is the second preset temperature, and T1<T2 .

In an embodiment of the present application, the heat exchange pump has a first gear, a second gear, and a third gear, and the step of determining the rotation speed of the electric assembly includes: if the rotation speed of the electric assembly n≤N1, The heat exchange pump gear corresponding to the second signal is the first gear; if the rotational speed of the electric assembly N1<n<N2, the heat exchange pump gear corresponding to the second signal is the second gear; if The rotation speed of the electric assembly is n≥N2, and the heat exchange pump gear corresponding to the second signal is the third gear; where N1 is the first preset rotation speed, N2 is the second preset rotation speed, and N1<N2 .

In an embodiment of the present application, the motor controller includes: a temperature processing module configured to collect the temperature of the electric assembly, and generate a temperature for controlling the electric assembly according to the temperature of the electric assembly The first signal of the heat exchange pump gear position, a rotational speed processing module, the rotational speed processing module is used to collect the rotational speed of the electric assembly, and according to the rotational speed of the electric assembly, generate a gear for controlling the heat exchange pump The second signal of the bit.

In an embodiment of the present application, the heat exchange pump controller includes a gear selection module, and the gear selection module is used to control the heat exchange pump to operate in different gears.

In an embodiment of the present application, the heat exchange pump controller further includes: a self-checking module, the self-checking module is used to detect the current, voltage, and speed of the heat exchange pump, when the current, voltage of the heat exchange pump , When at least one of the rotation speeds is not within the predetermined range, the heat exchange pump controller issues a fault alarm and controls the heat exchange pump to stop.

In an embodiment of the present application, the heat exchange pump controller further includes: a failure alarm module, the failure alarm module being used for alarming when the heat exchange pump fails.

In an embodiment of the present application, the electric assembly heat exchange system further includes a heat exchange medium temperature sensor, and the heat exchange medium temperature sensor is used to detect the temperature of the heat exchange medium in the heat exchange part of the electric assembly .

In an embodiment of the present application, the electric assembly heat exchange system further includes a display screen for displaying the working status of the heat exchange pump and the electric assembly.

Claims

A control method of an electric assembly heat exchange system, wherein the electric assembly heat exchange system includes an electric assembly, a heat exchange pump, and a heat exchanger, and the first port of the heat exchange pump is connected to the electric assembly. The first port of the heat exchange part is connected to the first port of the heat exchange part of the electric assembly, the second port of the heat exchange part of the electric assembly is connected to the first port of the heat exchanger, and the second port of the heat exchanger is connected to the heat exchange pump. Is connected to the second port, and the heat exchange pump has multiple gears;

The control method includes the following steps: judging the temperature of the electric assembly, generating a first signal for controlling the gear position of the heat exchange pump according to the temperature of the electric assembly, the magnitude of the first signal and the gear position of the heat exchange pump Corresponding to the high and low bits

Determine the rotation speed of the electric assembly, generate a second signal for controlling the gear position of the heat exchange pump according to the rotation speed of the electric assembly, the magnitude of the second signal corresponding to the gear position of the heat exchange pump;

Gear selection, comparing the gear position of the heat exchange pump corresponding to the first signal with the gear position of the heat exchange pump corresponding to the second signal, and setting the heat exchange pump to one of the two gear positions High gear operation.
The control method of an electric assembly heat exchange system according to claim 1, wherein before the step of determining the temperature of the electric assembly and the step of determining the rotation speed of the electric assembly, the method further comprises:

The heat exchange pump starts.
The control method of the electric assembly heat exchange system according to claim 2, characterized in that, after the heat exchange pump is started in said step, it further comprises:

The heat exchange pump self-test is to detect the current, voltage, and speed of the heat exchange pump, and when at least one of the current, voltage, and speed of the heat exchange pump is not within a predetermined range, a fault alarm is issued and the machine stops.
The control method of the electric assembly heat exchange system according to claim 2 or 3, characterized in that, after the heat exchange pump is started in said step, it further comprises:

The communication failure check is to detect the communication failure of the heat exchange pump. If the communication failure of the heat exchange pump, the heat exchange pump runs in the highest gear.
The control method of the electric assembly heat exchange system according to any one of claims 2 to 4, characterized in that, before starting the heat exchange pump in said step, it further comprises:

Medium temperature judgment, judging the temperature t2 of the heat exchange medium in the heat exchange part of the electric assembly, if t2≥T3, enter the step to start the heat exchange pump.
The control method of the electric assembly heat exchange system according to claim 5, characterized in that, before the medium temperature is judged, it further comprises:

The heat exchange pump self-checks, and if at least one of the current, voltage, and speed of the heat exchange pump is not within a predetermined range, a fault alarm is issued.
The control method of the electric assembly heat exchange system according to claim 6, wherein in the step of determining the medium temperature, if t2<T3, return to the step of heat exchange pump self-check.
The control method of an electric assembly heat exchange system according to any one of claims 1-7, wherein the heat exchange pump has a first gear, a second gear, and a third gear, and the step electric assembly Temperature judgment, including:

If the temperature t1 of the electric assembly is ≤ T1, the heat exchange pump gear corresponding to the first signal is the first gear;

If the temperature of the electric assembly is T1<t1<T2, the heat exchange pump gear corresponding to the first signal is the second gear;

If the temperature t1 of the electric assembly is greater than or equal to T2, the heat exchange pump gear corresponding to the first signal is the third gear;

Among them, T1 is the first preset temperature, T2 is the second preset temperature, and T1<T2.
The control method of an electric assembly heat exchange system according to any one of claims 1-8, wherein the heat exchange pump has a first gear, a second gear, and a third gear, and the step electric assembly Speed judgment, including:

If the rotation speed of the electric assembly n≤N1, the heat exchange pump gear corresponding to the second signal is the first gear;

If the rotation speed of the electric assembly is N1<n<N2, the heat exchange pump gear corresponding to the second signal is the second gear;

If the rotation speed of the electric assembly n≥N2, the heat exchange pump gear corresponding to the second signal is the third gear;

Wherein, N1 is the first preset speed, N2 is the second preset speed, and N1<N2.
An electric assembly heat exchange system, which is characterized by comprising: an electric assembly, a heat exchange pump, a heat exchanger, a motor controller, a heat exchange pump controller, a motor temperature sensor, and a motor speed sensor;

The first port of the heat exchange pump is connected to the first port of the heat exchange part of the electric assembly, and the second port of the heat exchange part of the electric assembly is connected to the first port of the heat exchanger, so The second port of the heat exchanger is connected to the second port of the heat exchange pump, the heat exchange pump has a plurality of gears, the motor controller is electrically connected to the electric assembly, and the heat exchange pump controller is connected to The heat exchange pump is electrically connected;

The motor controller is configured to collect the temperature of the electric assembly, and generate a first signal for controlling the gear position of the heat exchange pump according to the temperature of the electric assembly;

The motor controller is used to collect the rotation speed of the electric assembly, and generate a second signal for controlling the gear position of the heat exchange pump according to the rotation speed of the electric assembly;

The heat exchange pump controller is used to compare the gear position of the heat exchange pump corresponding to the first signal with the gear position of the heat exchange pump corresponding to the second signal, and control the heat exchange pump to operate in two gears. High gear operation in the middle position;

The motor temperature sensor is used to detect the temperature of the electric assembly;

The motor speed sensor is used to detect the speed of the electric assembly.
The electric assembly heat exchange system according to claim 10, wherein the electric assembly heat exchange system further comprises a heat exchange medium temperature sensor, and the heat exchange medium temperature sensor is used to detect the electric assembly The temperature of the heat exchange medium in the heat exchange section.
The electric assembly heat exchange system according to claim 10 or 11, wherein the motor controller comprises:

A temperature processing module for collecting the temperature of the electric assembly, and generating a first signal for controlling the gear position of the heat exchange pump according to the temperature of the electric assembly,

The rotational speed processing module is configured to collect the rotational speed of the electric assembly, and generate a second signal for controlling the gear position of the heat exchange pump according to the rotational speed of the electric assembly.
The electric assembly heat exchange system according to any one of claims 10-12, wherein the heat exchange pump controller comprises:

A gear selection module for comparing the gear position of the heat exchange pump corresponding to the first signal with the gear position of the heat exchange pump corresponding to the second signal, and controlling the heat exchange pump Run in the high gear of the two gears.
The electric assembly heat exchange system according to any one of claims 10-13, wherein the heat exchange pump controller further comprises:

The self-checking module is used to detect the current, voltage, and speed of the heat exchange pump. When at least one of the current, voltage, and speed of the heat exchange pump is not within a predetermined range, the heat exchange pump controller A fault alarm is issued and the heat exchange pump is controlled to stop.
The electric assembly heat exchange system according to any one of claims 10-14, wherein the heat exchange pump controller further comprises:

The communication failure checking module is used to detect the communication failure of the heat exchange pump, and control the heat exchange pump to run at the highest gear when the heat exchange pump communication fails.
The electric assembly heat exchange system according to any one of claims 10-15, wherein the electric assembly heat exchange system further comprises a display screen, and the display screen is used to display the heat exchange pump and the heat exchange system. State the working status of the electric assembly.
A vehicle, characterized by comprising the electric assembly heat exchange system according to claim 10.