Temperature control device, method and vehicle for a plurality of electric machines

Abstract

This application discloses a multi-motor temperature control device, method, and vehicle, applicable to vehicles equipped with multiple motors. It utilizes a first branch and a second branch connected in parallel to dissipate heat from the first and second motors respectively. A flow distribution component is installed between the cooling components and the first and second branches to allocate the flow ratio to the first and second branches. The flow ratio is determined based on the state parameters of the first and second motors. In other words, by using the parallel first and second branches to dissipate heat from the first and second motors respectively, and determining the flow ratio to the first and second branches based on their state parameters, the flow is allocated according to the actual needs of the first and second motors, achieving optimal heat dissipation for both motors and avoiding slow or excessive cooling. This not only improves the heat dissipation effect of each motor but also saves energy.

Description

Technical Field

[0001] This application relates to the field of motor temperature control technology, specifically to a multi-motor temperature control device, method, and vehicle. Background Technology

[0002] With the continuous development of new energy technologies, more and more vehicles are using electric motors as an important component of their drive systems, such as pure electric vehicles and hybrid vehicles. However, in complex road driving conditions, excessively high temperatures or large temperature fluctuations can often damage the motor or related electronic components, making temperature control of the motor necessary.

[0003] Currently, most electric drive components use a series cooling system, where the entire electric drive assembly is connected in series via a single loop to dissipate heat. However, many engineering vehicles, such as concrete mixers and excavators, have two or more motors, including drive motors and work motors (superstructure motors). The operating conditions and parameters of these two motors can differ significantly, leading to different cooling requirements. Using a single loop for cooling could result in one motor underheating (high temperature) while the other overheats (low temperature), clearly failing to meet actual cooling needs. Summary of the Invention

[0004] To address the aforementioned technical problems, this application is proposed. Embodiments of this application provide a multi-motor temperature control device, method, and vehicle, which solve the aforementioned technical problems.

[0005] According to one aspect of this application, a multi-motor temperature control device is provided, applied to a vehicle, the vehicle including a first motor and a second motor; the temperature control device includes: a first branch, the first branch being connected to the cooling water channel of the first motor; a second branch, the second branch being connected to the cooling water channel of the second motor, the second branch being connected in parallel with the first branch; a cooling component, the cooling component being connected in series with the first branch and the second branch to form a cooling circuit, for dissipating heat from the first motor and / or the second motor; and a flow distribution component, the flow distribution component being disposed between the cooling component and the first branch and the second branch, the flow distribution component being used to distribute the flow ratio to the first branch and the second branch; wherein, the flow ratio is determined based on the state parameters of the first motor and the state parameters of the second motor, the state parameters of the first motor including the temperature and operating parameters of the first motor, and the state parameters of the second motor including the temperature and operating parameters of the second motor.

[0006] In one embodiment, the temperature control device further includes a signal acquisition component, which is disposed at the first motor and the second motor, and is used to acquire the state parameters of the first motor and the state parameters of the second motor.

[0007] In one embodiment, the signal acquisition component includes: a first temperature sensor disposed at the first motor for acquiring the temperature of the first motor; a first parameter acquisition sensor disposed at the first motor for acquiring the operating parameters of the first motor; a second temperature sensor disposed at the second motor for acquiring the temperature of the second motor; and a second parameter acquisition sensor disposed at the second motor for acquiring the operating parameters of the second motor.

[0008] In one embodiment, the temperature control device further includes a processor, which is communicatively connected to the flow distribution component and the cooling component, and is used to calculate the flow ratio and the operating parameters of the cooling component based on the state parameters of the first motor and the state parameters of the second motor.

[0009] In one embodiment, the operating parameters include torque and speed; wherein, the processor calculates the heat generation change rate of the first motor based on the torque and speed of the first motor, the processor calculates the heat generation change rate of the second motor based on the torque and speed of the second motor, and the processor calculates the flow rate ratio and the operating parameters of the cooling component based on the temperature of the first motor, the heat generation change rate of the first motor, the temperature of the second motor, and the heat generation change rate of the second motor.

[0010] In one embodiment, the processor calculates the operating parameters of the cooling component based on the maximum temperature between the temperatures of the first motor and the second motor, and the maximum rate of change between the heat generation change rates of the first motor and the second motor; wherein the cooling component includes multiple operating levels, each operating level corresponding to a different maximum temperature and / or maximum rate of change.

[0011] In one embodiment, the processor calculates the flow rate ratio based on the temperature ratio between the temperatures of the first motor and the second motor, and the ratio of the rate of change of the heat output of the first motor to the rate of change of the heat output of the second motor; wherein, the flow rate ratio includes multiple ratios, and each flow rate ratio corresponds to a different temperature ratio and / or a different rate of change ratio.

[0012] In one embodiment, the temperature control device further includes a signal converter disposed between the processor and the flow distribution component and the cooling component.

[0013] In one embodiment, the flow distribution component includes any one of the following flow regulating devices: a ball valve, an electric valve, or an electric three-way valve.

[0014] In one embodiment, the cooling component includes: a variable-speed water pump disposed in the cooling circuit for driving the flow of coolant in the cooling circuit; a heat exchanger disposed in the cooling circuit for dissipating heat from the coolant; and a variable-speed fan disposed at the heat exchanger for dissipating heat from the heat exchanger.

[0015] According to another aspect of this application, a multi-motor temperature control method is provided, applied in the multi-motor temperature control device described in any of the above claims. The temperature control method includes: acquiring state parameters of the first motor and state parameters of the second motor; and calculating the flow ratio to the first branch and the second branch and the operating parameters of the cooling component based on the state parameters of the first motor and the state parameters of the second motor.

[0016] According to another aspect of this application, a vehicle is provided, comprising: a first motor; a second motor; and a multi-motor temperature control device as described in any of the preceding claims.

[0017] This application provides a multi-motor temperature control device, method, and vehicle, applicable to vehicles equipped with multiple motors. It establishes a first branch and a second branch, wherein the first branch connects to the cooling water channel of the first motor, and the second branch connects to the cooling water channel of the second motor. The second branch is connected in parallel with the first branch to achieve heat dissipation for both motors. A cooling component is connected in series with both the first and second branches to form a cooling circuit for cooling the first and / or second motors. A flow distribution component is provided between the cooling component and the first and second branches to distribute the flow rate to the first and second branches in a specific ratio. The flow rate ratio is determined according to... The state parameters of the first motor and the second motor are determined. The state parameters of the first motor include its temperature and operating parameters, and the state parameters of the second motor include its temperature and operating parameters. That is, the first and second branches connected in parallel are used to dissipate heat from the first motor and the second motor respectively. The flow ratio to the first branch and the second branch is determined based on the state parameters of the first motor and the second motor, so that the flow can be allocated according to the actual needs of the first motor and the second motor to achieve optimal heat dissipation for the first motor and the second motor, avoiding the problems of slow heat dissipation and over-cooling. This not only improves the heat dissipation effect of each motor, but also saves energy. Attached Figure Description

[0018] The above and other objects, features, and advantages of this application will become more apparent from the more detailed description of the embodiments of this application in conjunction with the accompanying drawings. The drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the embodiments of this application to explain this application and do not constitute a limitation thereof. In the drawings, the same reference numerals generally represent the same components or steps.

[0019] Figure 1 This is a structural diagram of the vehicle to which this application applies.

[0020] Figure 2 This is a schematic diagram of a multi-motor temperature control device provided in an exemplary embodiment of this application.

[0021] Figure 3 This is a schematic diagram of a multi-motor temperature control device provided in another exemplary embodiment of this application.

[0022] Figure 4 This is a schematic diagram of a multi-motor temperature control device provided in another exemplary embodiment of this application.

[0023] Figure 5 This is a schematic flowchart of a multi-motor temperature control method provided in an exemplary embodiment of this application.

[0024] Figure 6This is a schematic flowchart of a multi-motor temperature control method provided in another exemplary embodiment of this application.

[0025] Figure 7 This is a flowchart illustrating a traffic ratio allocation method provided in an exemplary embodiment of this application.

[0026] Figure 8 This is a structural diagram of an electronic device provided in an exemplary embodiment of this application. Detailed Implementation

[0027] Hereinafter, exemplary embodiments according to this application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of this application, and not all embodiments of this application. It should be understood that this application is not limited to the exemplary embodiments described herein.

[0028] Figure 1 This is a structural diagram of the vehicle to which this application applies. For example... Figure 1 As shown, the vehicle includes a first motor 1, a second motor 2, and a temperature control device 3. The temperature control device 3 is connected to the cooling channels of the first motor 1 and the second motor 2, and is used to dissipate heat from both motors. Specifically, the vehicle can be a concrete mixer truck, excavator, or other engineering vehicle. The first motor 1 and the second motor 2 are the drive motor and the working motor of the engineering vehicle, respectively, meaning that the first motor 1 and the second motor 2 are used to drive the engineering vehicle's movement and to drive its working mechanism (such as the rotation of the mixing drum or the movement of the robotic arm).

[0029] The first motor 1 and the second motor 2 operate in different environments and have different modes. Taking a concrete mixer truck (where the first motor 1 is the drive motor and the second motor 2 is the working motor) as an example, when the mixer truck is parked, the first motor 1 stops working (does not generate heat), while the second motor 2 continues to work (generates heat). However, while the mixer truck is moving, both the first motor 1 and the second motor 2 work (generate heat), but the heat generation power of the first motor 1 and the second motor 2 is different (because their corresponding driving force requirements are different, resulting in different output power). In other words, it is difficult for the first motor 1 and the second motor 2 to maintain a consistent heat generation and temperature during a single operation of the mixer truck, which leads to different heat dissipation requirements for the first motor 1 and the second motor 2.

[0030] If a single cooling circuit is used to simultaneously cool the first motor 1 and the second motor 2, it is clearly impossible to meet the cooling needs of both motors at the same time. For example, while meeting the cooling needs of the motor with the higher temperature, the other motor will be overcooled; conversely, while meeting the cooling needs of the motor with the lower temperature, the cooling needs of the other motor may be difficult to meet. Therefore, to address the problem of simultaneously meeting the cooling needs of multiple motors (in vehicles with two or more motors), this application proposes a multi-motor temperature control device. This device can simultaneously meet the cooling needs of multiple motors, ensuring a safe operating environment for the motors, thereby reducing motor failure rates, extending motor lifespan, and minimizing energy consumption by controlling the operation of the temperature control device according to cooling requirements.

[0031] Figure 2 This is a schematic diagram of a multi-motor temperature control device provided in an exemplary embodiment of this application. This temperature control device is applied to the aforementioned vehicle, such as... Figure 2 As shown, the temperature control device 3 includes: a first branch 31, a second branch 32, a cooling component 33, and a flow distribution component 34; wherein, the first branch 31 is connected to the cooling water channel of the first motor 1, the second branch 32 is connected to the cooling water channel of the second motor 2, the second branch 32 is connected in parallel with the first branch 31, the cooling component 33 is connected in series with the first branch 31 and the second branch 32 to form a cooling circuit for cooling the first motor 1 and / or the second motor 2, the flow distribution component 34 is disposed between the cooling component 33 and the first branch 31 and the second branch 32, and the flow distribution component 34 is used to distribute the flow ratio to the first branch 31 and the second branch 32; wherein, the flow ratio is determined according to the state parameters of the first motor 1 and the state parameters of the second motor 2, the state parameters of the first motor 1 including the temperature and operating parameters of the first motor 1, and the state parameters of the second motor 2 including the temperature and operating parameters of the second motor 2.

[0032] Since different motors may have different heat dissipation requirements, this application uses different branch circuits to dissipate heat for each motor in order to simultaneously meet their heat dissipation needs. The following explanation uses only two motors as an example; however, it should be understood that the vehicle described in this application may be equipped with two or more motors.

[0033] This application provides heat dissipation for the first motor 1 and the second motor 2 by setting up a first branch 31 and a second branch 32 in parallel, respectively. Furthermore, a flow distribution component 34 is provided between the cooling component 33 and the first branch 31 and the second branch 32 to control the flow ratio to the first branch 31 and the second branch 32. In one embodiment, the flow distribution component 34 can be any of the following flow regulating devices: a ball valve, an electric valve, or an electric three-way valve, and the flow distribution component 34 can be located at the confluence of the first branch 31 and the second branch 32 (e.g., ...). Figure 2 (As shown), or it can be a single flow control valve (such as) respectively installed on the first branch 31 and the second branch 32. Figure 3 (As shown).

[0034] Specifically, this application calculates and determines the heat dissipation requirements of the first motor 1 and the second motor 2 based on the state parameters of the first motor 1 and the second motor 2, and allocates the flow ratio to the first branch 31 and the second branch 32 through the flow distribution component 34 to meet the heat dissipation requirements of the first motor 1 and the second motor 2.

[0035] This application provides a multi-motor temperature control device applied to a vehicle equipped with multiple motors. It comprises a first branch and a second branch, wherein the first branch connects to the cooling channel of the first motor, and the second branch connects to the cooling channel of the second motor. The second branch is connected in parallel with the first branch to achieve heat dissipation for both motors. A cooling component is connected in series with the first and second branches to form a cooling circuit for cooling the first and / or second motors. A flow distribution component is provided between the cooling component and the first and second branches to allocate the flow rate to the first and second branches in a specific ratio. The flow rate ratio is determined based on the first motor's... The state parameters of the first motor and the second motor are determined. The state parameters of the first motor include its temperature and operating parameters, and the state parameters of the second motor include its temperature and operating parameters. That is, the first and second branches connected in parallel are used to dissipate heat from the first and second motors respectively. The flow ratio to the first and second branches is determined based on the state parameters of the first and second motors. Thus, the flow can be allocated according to the actual needs of the first and second motors to achieve optimal heat dissipation for the first and second motors, avoiding problems such as slow heat dissipation and over-cooling. This not only improves the heat dissipation effect of each motor, but also saves energy.

[0036] Figure 4 This is a schematic diagram of a multi-motor temperature control device provided in another exemplary embodiment of this application. (See diagram below.) Figure 4As shown, the temperature control device may further include a signal acquisition component 35, which is disposed at the first motor 1 and the second motor 2, and is used to acquire the status parameters of the first motor 1 and the status parameters of the second motor 2.

[0037] Specifically, the aforementioned signal acquisition component 35 may include: a first temperature sensor, a first parameter acquisition sensor, a second temperature sensor, and a second parameter acquisition sensor; wherein, the first temperature sensor is located at the first motor 1 and is used to acquire the temperature of the first motor 1, the first parameter acquisition sensor is located at the first motor 1 and is used to acquire the operating parameters of the first motor 1, the second temperature sensor is located at the second motor 2 and is used to acquire the temperature of the second motor 2, and the second parameter acquisition sensor is located at the second motor 2 and is used to acquire the operating parameters of the second motor 2.

[0038] By using a first temperature sensor and a first parameter acquisition sensor installed at the first motor 1, the temperature value and operating parameters (specifically including torque, speed, power, etc.) of the first motor 1 are periodically collected. Similarly, by using a second temperature sensor and a second parameter acquisition sensor installed at the second motor 2, the temperature value and operating parameters (specifically including torque, speed, power, etc.) of the second motor 2 are periodically collected. After obtaining the temperature value and operating parameters of the first motor 1 and the second motor 2, the current heat dissipation requirements of the first motor 1 and the second motor 2 can be calculated. Furthermore, the future heat dissipation requirements of the first motor 1 and the second motor 2 can be predicted based on their operating parameters, thereby enabling proactive responses to future heat dissipation needs and effectively controlling the temperature range of the first motor 1 and the second motor 2.

[0039] In one embodiment, such as Figure 4 As shown, the temperature control device may further include a processor 36, which is communicatively connected to the flow distribution component 34 and the cooling component 33, and is used to calculate the flow ratio and the operating parameters of the cooling component 33 based on the state parameters of the first motor 1 and the state parameters of the second motor 2.

[0040] Specifically, the processor 36 can be an HCU, VCU, or central control unit, etc. The processor 36 can calculate the current heat dissipation requirements of the first motor 1 and the second motor 2 in real time based on the temperature value and operating parameters of the first motor 1 and the second motor 2. It can also predict the future heat dissipation requirements based on the operating parameters of the first motor 1 and the second motor 2. In this way, it can control the flow distribution component 34 to allocate the flow ratio to the first branch 31 and the second branch 32, and control the operating parameters of the cooling component 33 to control the circulation efficiency and heat dissipation efficiency of the cooling circuit. Thus, while meeting the current heat dissipation requirements, it can also respond to the future heat dissipation requirements in advance, so as to effectively control the temperature range of the first motor 1 and the second motor 2.

[0041] In one embodiment, the operating parameters may include torque and speed; wherein, the processor 36 calculates the heat generation change rate of the first motor 1 based on the torque and speed of the first motor 1, the processor 36 calculates the heat generation change rate of the second motor 2 based on the torque and speed of the second motor 2, and the processor 36 calculates the flow rate ratio and the operating parameters of the cooling component 33 based on the temperature of the first motor 1, the heat generation change rate of the first motor 1, the temperature of the second motor 2, and the heat generation change rate of the second motor 2.

[0042] Specifically, due to the influence of the external environment and the limitations of the temperature sensor's detection accuracy, the temperature values ​​of the first motor 1 and the second motor 2 detected by the temperature sensor will have a certain error. Furthermore, the temperatures of the first motor 1 and the second motor 2 reflect their current heat dissipation requirements. There is a time lag between acquiring the temperature and operating parameters of the first motor 1 and the second motor 2 and the cooling component 33 and the flow distribution component 34 responding and acting on the first motor 1 and the second motor 2. In other words, the heat dissipation requirements of the first motor 1 and the second motor 2 will not be met immediately, but will be met after a certain period of time, and after this period, the heat dissipation requirements of the first motor 1 and the second motor 2 may change again. Therefore, this application calculates the rate of change of heat generation of the first motor 1 and the second motor 2 based on their torque and speed to predict the heat generation trend of the first motor 1 and the second motor 2, thereby estimating the future heat dissipation requirements of the first motor 1 and the second motor 2 and responding to these heat dissipation requirements in advance, thus better meeting the heat dissipation needs of the first motor 1 and the second motor 2.

[0043] In one embodiment, such as Figure 4 As shown, the temperature control device may further include a signal converter 37, which is disposed between the processor 36 and the flow distribution component 34 and the cooling component 33. By providing the signal converter 37, the control signal of the processor 36 can be converted into a signal that can be recognized by the flow distribution component 34 and the cooling component 33, thereby ensuring effective control of the flow distribution component 34 and the cooling component 33 by the processor 36, so as to ensure that the heat dissipation requirements of the first motor 1 and the second motor 2 are met.

[0044] In one embodiment, such as Figure 4 As shown, the cooling component 33 includes: a variable speed water pump 331, a heat exchanger 332, and a variable speed fan 333; wherein, the variable speed water pump 331 is disposed in the cooling circuit and is used to drive the flow of coolant in the cooling circuit, the heat exchanger 332 is disposed in the cooling circuit and is used to dissipate heat from the coolant, and the variable speed fan 333 is disposed at the heat exchanger 332 and is used to dissipate heat from the heat exchanger 332.

[0045] By setting up a variable-speed water pump 331, the coolant (e.g., water or oil) in the cooling circuit can be driven to circulate in the cooling circuit, thereby removing heat from the first motor 1 and the second motor 2 located in the cooling circuit, thus achieving heat dissipation for the first motor 1 and the second motor 2. Furthermore, the speed of the variable-speed water pump 331 is adjustable, meaning it includes multiple speed settings. By adjusting the speed of the variable-speed water pump 331 (or selecting the corresponding setting), the flow rate of the coolant can be adjusted, thereby adjusting the cooling efficiency. Additionally, by setting up a heat exchanger 332, heat exchange can occur between the heat exchanger and the coolant in the cooling circuit, removing heat from the coolant. The heat from the coolant flowing back from the first motor 1 and the second motor 2 lowers the temperature of the coolant, further dissipating heat from the first motor 1 and the second motor 2. In addition, by installing a speed-regulating fan 333 at the heat exchanger 332, air cooling can be used to dissipate heat from the heat exchanger 332, thereby ensuring that the heat exchanger 332 is maintained at a lower temperature so that it can exchange heat with the coolant. Furthermore, the speed of the speed-regulating fan 333 can be adjusted, that is, the speed-regulating fan 333 includes multiple speed levels. By adjusting the speed of the speed-regulating fan 333 (or selecting the corresponding level), the heat dissipation effect of the heat exchanger 332 can be adjusted.

[0046] Figure 5 This is a schematic flowchart illustrating a multi-motor temperature control method according to an exemplary embodiment of this application. This temperature control method is applied to any of the multi-motor temperature control devices described above, such as... Figure 5 As shown, the temperature control method includes the following steps:

[0047] Step 510: Obtain the state parameters of the first motor and the state parameters of the second motor.

[0048] Specifically, the signal acquisition component 35 in the above embodiment can obtain the state parameters of the first motor 1 and the second motor 2, and use this as a basis to dissipate heat from the first motor 1 and the second motor 2.

[0049] Step 520: Based on the state parameters of the first motor and the second motor, calculate the flow ratio to the first branch and the second branch, and the operating parameters of the cooling components.

[0050] Specifically, the processor 36 in the above embodiment calculates the current heat dissipation requirements of the first motor 1 and the second motor 2 in real time based on the temperature value and operating parameters of the first motor 1 and the second motor 2. It can also predict the future heat dissipation requirements based on the operating parameters of the first motor 1 and the second motor 2. In this way, it can control the flow distribution component 34 to allocate the flow ratio to the first branch 31 and the second branch 32, and control the operating parameters of the cooling component 33 to control the circulation efficiency and heat dissipation efficiency of the cooling circuit. Thus, while meeting the current heat dissipation requirements, it can also respond to the future heat dissipation requirements in advance, so as to effectively control the temperature range of the first motor 1 and the second motor 2.

[0051] This application provides a multi-motor temperature control method applied to a vehicle equipped with multiple motors. It involves setting up a first branch and a second branch, wherein the first branch connects to the cooling water channel of the first motor, and the second branch connects to the cooling water channel of the second motor. The second branch is connected in parallel with the first branch to achieve heat dissipation for both motors. A cooling component is connected in series with both the first and second branches to form a cooling circuit for cooling the first and / or second motors. A flow distribution component is also provided between the cooling component and the first and second branches to allocate the flow rate to the first and second branches. The flow rate ratio is determined based on the state parameters of the first motor and the second motor. The state parameters are determined, including the temperature and operating parameters of the first motor and the second motor. Specifically, the first and second parallel branches are used to dissipate heat from the first and second motors respectively. By acquiring the state parameters of both motors and determining the flow ratio to the first and second branches based on these parameters, the flow can be allocated according to the actual needs of the first and second motors, achieving optimal heat dissipation and avoiding slow or excessive cooling. This not only improves the heat dissipation effect of each motor but also saves energy.

[0052] Figure 6 This is a schematic flowchart illustrating a multi-motor temperature control method provided in another exemplary embodiment of this application. Figure 6 As shown, the temperature control method includes the following steps:

[0053] Step 610: Detect the motor temperature.

[0054] Specifically, the first temperature sensor and the second temperature sensor in the above embodiment detect the current temperature values ​​of the first motor 1 and the second motor 2, respectively, and record them as T1 and T2.

[0055] Step 620: Detect the motor's torque and speed.

[0056] Specifically, the first parameter acquisition sensor and the second parameter acquisition sensor in the above embodiment detect the torque and speed of the first motor 1 and the second motor 2 at the current moment, respectively.

[0057] Step 630: Calculate the heat generated by the motor.

[0058] Specifically, the heat generated by the first motor 1 at the current moment can be calculated based on the torque and speed of the first motor 1, and the heat generated by the second motor 2 at the current moment can be calculated based on the torque and speed of the second motor 2.

[0059] Step 640: Calculate the rate of change of heat generation of the motor.

[0060] Specifically, based on the heat output of the first motor 1 at the current moment and the heat output at the previous moment (the heat output obtained from the previous detection and calculation), the heat output change rate dQ1 of the first motor 1 is calculated. At the same time, based on the heat output of the second motor 2 at the current moment and the heat output at the previous moment (the heat output obtained from the previous detection and calculation), the heat output change rate dQ2 of the second motor 2 is calculated. The heat output change rate dQ1 of the first motor 1 is equal to the ratio of the heat output of the first motor 1 at the current moment to the heat output at the previous moment, and the heat output change rate dQ2 of the second motor 2 is equal to the ratio of the heat output of the second motor 2 at the current moment to the heat output at the previous moment.

[0061] Step 650: Filter the rate of change of heat output.

[0062] Because interference signals may exist during the data acquisition process of the sensor, the acquired data needs to be filtered to eliminate interference. Considering that the first motor 1 and the second motor 2 may experience sudden torque changes during operation, directly filtering the initial data such as torque, speed, or heat generation may delete the actual data. Therefore, this application filters the heat generation change rate to ensure that sudden changes in the motor's operating state are retained in the heat generation change rate, thus better reflecting the changes in the motor's operating state and allowing for a more accurate prediction of the motor's future heat dissipation requirements.

[0063] Step 660: Control the operating mode of the flow distribution component and the cooling component according to the temperature and heat generation change rate of the motor.

[0064] Specifically, such as Figure 7As shown, first, determine the magnitude relationship between T1 and T2 and the magnitude relationship between dQ1 and dQ2 to obtain the highest temperature and the maximum heat generation rate change in the first motor 1 and the second motor 2, that is, the maximum temperature and the maximum rate of change. Determine the working gears of the speed-regulating water pump 331 and the speed-regulating fan 333 according to the maximum temperature and the maximum rate of change, that is, determine the corresponding working gears of the speed-regulating water pump 331 and the speed-regulating fan 333 according to the highest temperature and the maximum heat generation rate change in the two motors. Among them, the maximum temperature and / or the maximum rate of change corresponding to each working gear of the speed-regulating water pump 331 and the speed-regulating fan 333 are different. Specifically, the higher the highest temperature, the higher the working gear of the speed-regulating water pump 331 and the speed-regulating fan 333 (the faster the corresponding speed), and the higher the maximum heat generation rate change, the higher the working gear of the speed-regulating water pump 331 and the speed-regulating fan 333 (the faster the corresponding speed). Then, according to the magnitude relationship between T1 and T2 (such as the temperature ratio between T1 and T2) and the magnitude relationship between dQ1 and dQ2 (such as the rate of change ratio between dQ1 and dQ2), set the flow ratio K of the first branch 31 and the second branch 32. Among them, there are multiple flow ratios K, and each flow ratio corresponds to a different state (that is, the magnitude relationship between T1 and T2, the magnitude relationship between dQ1 and dQ2).

[0065] Specifically, when T1 > T2 (that is, T1 / T2 > 1), further determine the magnitude relationship between dQ1 and dQ2. If dQ1 > dQ2 (that is, dQ1 / dQ2 > 1), it means that the temperature of the first motor 1 is higher than that of the second motor 2, and the heat generation rate increase of the first motor 1 is also higher than that of the second motor 2. At this time, it is predicted that the heat load of the first motor 1 is greater. Therefore, it is necessary to increase the flow of the first branch 31, then K > K1 > 1 (for example, K1 = 7 / 3); similarly, if dQ1 = dQ2, then K = K1 > 1 (for example, K1 = 7 / 3); if dQ1 < dQ2, then 1 < K2 < K < K1 (for example, K1 = 7 / 3, K2 = 6 / 4).

[0066] When T1 = T2, further determine the magnitude relationship between dQ1 and dQ2. If dQ1 > dQ2, it means that the temperature of the first motor 1 is equal to that of the second motor 2, but the heat generation rate increase of the first motor 1 is higher than that of the second motor 2. At this time, it is predicted that the subsequent temperature of the first motor 1 may be higher. Therefore, it is necessary to increase the flow of the first branch 31, then K2 > K > 1 (for example, K2 = 6 / 4); similarly, if dQ1 = dQ2, then K = 1, if dQ1 < dQ2, then K3 < K < 1 (for example, K3 = 4 / 6).

[0067] When T1 < T2, further determine the magnitude relationship between dQ1 and dQ2. If dQ1 > dQ2, it indicates that the temperature of the first motor 1 is lower than that of the second motor 2, but the heat generation rate increase of the first motor 1 is higher than that of the second motor 2. At this time, it is predicted that the heat generation of the first motor 1 will increase. Therefore, the flow rate of the second branch 32 can be appropriately increased, so that K3 > K > K4 (where 1 > K3 > K4, for example, K3 = 4 / 6, K4 = 3 / 7); similarly, if dQ1 = dQ2, then K = K4 (for example, K4 = 3 / 7); if dQ1 < dQ2, then K < K4 (for example, K4 = 3 / 7).

[0068] It should be understood that K1, K2, K3, and K4 in this application are only given示例性 and do not limit their specific values. The specific values of K1, K2, K3, and K4 can be set according to the requirements of the actual application scenario. Optionally, the flow rate ratio of the first branch 31 and the second branch 32 can also be set comprehensively according to T1 / T2 and dQ1 / dQ2, for example, the flow rate ratio is the weighted sum of T1 / T2 and dQ1 / dQ2.

[0069] Next, refer to Figure 8 to describe the electronic device according to an embodiment of the present application. The electronic device can be any one or both of the first device and the second device, or a stand-alone device independent of them, and the stand-alone device can communicate with the first device and the second device to receive the input signals collected from them.

[0070] Figure 8 The block diagram of the electronic device according to an embodiment of the present application is illustrated.

[0071] As Figure 8 shown, the electronic device 10 includes one or more processors 11 and a memory 12.

[0072] The processor 11 can be a central processing unit (CPU) or other forms of processing units with data processing capabilities and / or instruction execution capabilities, and can control other components in the electronic device 10 to perform desired functions.

[0073] The memory 12 may include one or more computer program products, which may include various forms of computer-readable storage media, such as volatile memory and / or non-volatile memory. The volatile memory may include, for example, random access memory (RAM) and / or cache memory. The non-volatile memory may include, for example, read-only memory (ROM), hard disk, flash memory, etc. One or more computer program instructions may be stored on the computer-readable storage medium, and the processor 11 may execute the program instructions to implement the methods of the various embodiments of this application described above and / or other desired functions. Various contents such as input signals, signal components, and noise components may also be stored in the computer-readable storage medium.

[0074] In one example, the electronic device 10 may also include an input device 13 and an output device 14, which are interconnected via a bus system and / or other forms of connection mechanism (not shown).

[0075] When the electronic device is a standalone device, the input device 13 can be a communication network connector for receiving the collected input signals from the first device and the second device.

[0076] In addition, the input device 13 may also include, for example, a keyboard, a mouse, etc.

[0077] The output device 14 can output various information to the outside, including determined distance information, direction information, etc. The output device 14 may include, for example, a display, a speaker, a printer, and a communication network and its connected remote output devices, etc.

[0078] Of course, for the sake of simplicity, Figure 8 Only some of the components of the electronic device 10 relevant to this application are shown in this illustration; components such as buses, input / output interfaces, etc., are omitted. In addition, the electronic device 10 may include any other suitable components depending on the specific application.

[0079] The computer program product can be written in any combination of one or more programming languages ​​to perform the operations of the embodiments of this application. The programming languages ​​include object-oriented programming languages ​​such as Java and C++, as well as conventional procedural programming languages ​​such as C or similar languages. The program code can be executed entirely on the user's computing device, partially on the user's computing device, as a standalone software package, partially on the user's computing device and partially on a remote computing device, or entirely on a remote computing device or server.

[0080] The computer-readable storage medium may be any combination of one or more readable media. A readable medium may be a readable signal medium or a readable storage medium. A readable storage medium may, for example, include, but is not limited to, electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatuses, or devices, or any combination thereof. More specific examples of readable storage media (a non-exhaustive list) include: electrical connections having one or more wires, portable disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0081] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of this application to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A multi-motor temperature control device, applied to a vehicle, the vehicle including a first motor and a second motor; characterized in that, The temperature control device includes: The first branch is connected to the cooling water channel of the first motor; The second branch is connected to the cooling water channel of the second motor, and the second branch is connected in parallel with the first branch; A cooling component, wherein the cooling component is connected in series with the first branch and the second branch to form a cooling circuit, for dissipating heat from the first motor and / or the second motor; The cooling component includes: a variable-speed water pump disposed in the cooling circuit for driving the flow of coolant in the cooling circuit; a heat exchanger disposed in the cooling circuit for dissipating heat from the coolant; and a variable-speed fan disposed at the heat exchanger for dissipating heat from the heat exchanger; and A flow distribution component is disposed between the cooling component and the first branch and the second branch, and the flow distribution component is used to distribute the flow ratio to the first branch and the second branch; The flow rate ratio is determined based on the status parameters of the first motor and the status parameters of the second motor. The status parameters of the first motor include the temperature and operating parameters of the first motor, and the status parameters of the second motor include the temperature and operating parameters of the second motor. The temperature control device further includes a processor, which is communicatively connected to the flow distribution component and the cooling component, and is used to calculate the flow ratio and the operating parameters of the cooling component based on the state parameters of the first motor and the state parameters of the second motor. The operating parameters of both the first motor and the second motor include torque and speed. The processor calculates the heat generation change rate of the first motor based on its torque and speed, and calculates the heat generation change rate of the second motor based on its torque and speed. The processor also calculates the flow rate ratio and the operating parameters of the cooling component based on the temperature of the first motor, the heat generation change rate of the first motor, and the temperature and heat generation change rate of the second motor. The cooling component includes multiple operating levels, each corresponding to a different maximum temperature and / or a different maximum rate of change. The processor calculates the operating parameters of the cooling component based on the maximum temperature between the temperatures of the first motor and the second motor, and the maximum rate of change between the heat generation change rates of the first motor and the second motor.

2. The temperature control device according to claim 1, characterized in that, The temperature control device further includes: A signal acquisition component is provided at the first motor and the second motor, and is used to acquire the state parameters of the first motor and the state parameters of the second motor.

3. The temperature control device according to claim 2, characterized in that, The signal acquisition component includes: A first temperature sensor is installed at the first motor to collect the temperature of the first motor. The first parameter acquisition sensor is installed at the first motor and is used to acquire the operating parameters of the first motor. A second temperature sensor, located at the second motor, is used to collect the temperature of the second motor; and The second parameter acquisition sensor is installed at the second motor and is used to acquire the operating parameters of the second motor.

4. The temperature control device according to claim 1, characterized in that, The processor calculates the flow rate ratio based on the temperature ratio between the temperatures of the first motor and the second motor, and the ratio of the rate of change of the heat output of the first motor to the rate of change of the heat output of the second motor; wherein, the flow rate ratio includes multiple ratios, and each flow rate ratio corresponds to a different temperature ratio and / or a different rate of change ratio.

5. The temperature control device according to claim 1, characterized in that, The temperature control device further includes a signal converter, which is disposed between the processor, the flow distribution component, and the cooling component.

6. The temperature control device according to claim 1, characterized in that, The flow distribution component includes any one of the following flow regulating devices: ball valve, electric valve.

7. A multi-motor temperature control method, applied in the multi-motor temperature control device according to any one of claims 1-5, characterized in that, The temperature control method includes: Obtain the state parameters of the first motor and the state parameters of the second motor; and Based on the state parameters of the first motor and the state parameters of the second motor, the flow ratio to the first branch and the second branch and the operating parameters of the cooling component are calculated; wherein, the cooling component includes multiple operating levels, each of which corresponds to a different maximum temperature and / or a different maximum rate of change. The processor calculates the operating parameters of the cooling component based on the maximum temperature between the temperatures of the first motor and the second motor, and the maximum rate of change between the heat generation change rates of the first motor and the second motor.

8. A vehicle, characterized in that, include: First motor; Second motor; as well as The temperature control device for multiple motors as described in any one of claims 1-6.

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