Temperature detection structure, temperature protection method and device, and motor controller
By installing a temperature detection unit in the cooling channel, the cost and resource consumption problems caused by the increase in the number of NTCs are solved, and temperature monitoring and safety improvement of the motor controller are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- HEFEI SUNSHINE POWER TECH CO LTD
- Filing Date
- 2024-11-18
- Publication Date
- 2026-05-29
Smart Images
Figure CN122108382A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of new energy vehicle technology, and in particular to a temperature detection structure, a temperature protection method and device, and a motor controller. Background Technology
[0002] In related technologies, automotive power supply temperature monitoring systems often employ surface-mount negative temperature coefficient thermistors (NTCs) to detect the internal temperature of the automotive power supply. NTCs are typically mounted on a printed circuit board (PCB) near the power transistors inside the automotive power supply. However, due to the large number of power transistors, this necessitates increasing the number of NTCs, increasing costs and consuming significant controller pin resources. Summary of the Invention
[0003] This application provides a temperature detection structure, a temperature protection method and device, and a motor controller, which can help monitor the internal temperature of the motor controller in a timely manner, protect the motor controller, and reduce production costs.
[0004] In a first aspect, embodiments of this application provide a temperature detection structure, which includes: a cooling channel, multiple power modules disposed on the cooling path of the cooling channel, a cooling liquid that can be introduced into the cooling channel to dissipate heat from the multiple power modules, a first temperature detection unit disposed at the outlet of the cooling channel, and a second temperature detection unit disposed between two adjacent power modules on the cooling path.
[0005] This application's technical solution incorporates a cooling channel within a temperature detection structure. A first temperature detection unit is installed at the outlet of the cooling channel to promptly monitor the temperature at the outlet, ensuring the normal operation of the cooling liquid within the channel. A second temperature detection unit is positioned between adjacent power modules along the cooling path to monitor the module temperature. Furthermore, based on the temperature difference and changes detected by the first and second temperature detection units, it is possible to determine if any abnormalities or extreme operating conditions exist within the cooling channel. This facilitates timely monitoring of the motor controller's internal temperature, protecting it. Moreover, by using the first and second temperature detection units to monitor both the cooling channel's internal temperature and the power module's temperature, the number of negative temperature coefficient thermistors (NTCs) on the printed circuit board (PCB) can be reduced, thus lowering costs.
[0006] According to the aforementioned embodiments of the first aspect of this application, the temperature detection structure further includes a third temperature detection unit, which is located near the power module of the liquid inlet of the cooling channel.
[0007] According to the aforementioned embodiments of the first aspect of this application, the cooling channel includes a first water channel section and a second water channel section arranged in series. Each of the first water channel section and the second water channel section is provided with multiple power modules, and the second temperature detection unit is located between the first water channel section and the second water channel section.
[0008] According to the aforementioned embodiments of the first aspect of this application, the power module installed on any waterway section includes a power factor correction (PFC) module, a dual bridge series resonant converter (DBSRC) module, and a direct current-direct current (DC-DC) power supply module.
[0009] According to the aforementioned embodiment of the first aspect of this application, the cooling liquid flows along the first water channel section to the second water channel section, and the second temperature detection unit is positioned close to the PFC module on the first water channel section.
[0010] According to the aforementioned embodiments of the first aspect of this application, the temperature detection structure further includes a control module, which is disposed near the first waterway section.
[0011] According to any of the foregoing embodiments of the first aspect of this application, the first temperature detection unit and / or the second temperature detection unit includes a temperature probe, which can be inserted into the cooling channel to detect the temperature of the cooling liquid.
[0012] According to any of the foregoing embodiments of the first aspect of this application, the first temperature detection unit and / or the second temperature detection unit includes a patch thermal sensor, which is attached to the inner wall of the cooling channel.
[0013] Secondly, embodiments of this application provide a temperature protection method, which uses a temperature detection structure of any of the aforementioned embodiments of the first aspect of this application to protect the power module from temperature. The temperature protection method includes: acquiring temperature detection values from a first temperature detection unit, a second temperature detection unit, and a third temperature detection unit, respectively obtaining a first temperature detection value, a second temperature detection value, and a third temperature detection value; the first temperature detection unit is capable of detecting the outlet temperature of the cooling channel, the second temperature detection unit is capable of detecting the temperatures of the PFC module and the DBSRC module, and the third temperature detection unit is capable of detecting the temperature of the DC-DC module; determining whether the first temperature detection value exceeds a first threshold, and if so, controlling the power module to shut down; determining whether the second temperature detection value exceeds a second threshold, and if so, controlling the power module to shut down; determining whether the third temperature detection value exceeds a third threshold, and if so, controlling the power module to shut down; determining whether the difference between the second temperature detection value and the third temperature detection value exceeds a fourth threshold, and if so, controlling the power module to shut down; determining whether the third temperature detection value exceeds a fifth threshold, and whether the first temperature detection value and the second temperature detection value are simultaneously less than a sixth threshold, and if so, controlling the power module to shut down.
[0014] The temperature protection method in this application protects the power module by means of the temperature detection structure of any of the aforementioned embodiments of the first aspect of this application. The temperature protection method includes: acquiring the temperature detection values of the first temperature detection unit, the second temperature detection unit, and the third temperature detection unit, respectively obtaining the first temperature detection value, the second temperature detection value, and the third temperature detection value; determining whether the first temperature detection value exceeds a first threshold, and if so, controlling the power module to shut down; determining whether the second temperature detection value exceeds a second threshold, and if so, controlling the power module to shut down; determining whether the third temperature detection value exceeds a third threshold, and if so, controlling the power module to shut down; determining whether the difference between the second temperature detection value and the third temperature detection value exceeds a fourth threshold, and if so, controlling the power module to shut down; determining whether the third temperature detection value exceeds a fifth threshold, and whether the first temperature detection value and the second temperature detection value are simultaneously less than a sixth threshold, and if so, controlling the power module to shut down. By using the temperature detection structure to detect the outlet temperature of the cooling channel, the DC-DC module temperature, the PFC module, and the DBSRC module temperature in a timely manner, the corresponding module can be controlled to shut down after the detected temperature exceeds a preset temperature, which is beneficial to improving the safety and reliability of the motor controller operation. Furthermore, based on the temperature difference and temperature change detected by the first temperature detection unit, the second temperature detection unit, and the third temperature detection unit, it is possible to determine whether there are any abnormalities or extreme operating conditions inside the cooling channel. This is beneficial for timely monitoring of the temperature inside the motor controller, protecting the motor controller, and also reduces the number of NTCs on the PCB, which helps to reduce costs.
[0015] According to the aforementioned embodiments of the second aspect of this application, the temperature protection method further includes: determining whether a first temperature detection value drops below a first threshold; if so, controlling the power module to power on; determining whether a second temperature detection value drops below a second threshold; if so, controlling the power module to power on; determining whether a third temperature detection value drops below a third threshold; if so, controlling the power module to power on; determining whether the difference between the second and third temperature detection values drops below a fourth threshold; if so, controlling the power module to power on; determining whether the third temperature detection value drops below a fifth threshold, and whether the first and second temperature detection values simultaneously exceed a sixth threshold; if so, controlling the power module to power on.
[0016] Thirdly, embodiments of this application provide a temperature protection device, comprising: a temperature detection value acquisition module, a first processing module, a second processing module, a third processing module, a fourth processing module, and a fifth processing module. The temperature detection value acquisition module acquires the temperature detection values of the first temperature detection unit, the second temperature detection unit, and the third temperature detection unit. The first processing module determines whether the first temperature detection value exceeds a first threshold; if so, it controls the power module to shut down. The second processing module determines whether the second temperature detection value exceeds a second threshold; if so, it controls the power module to shut down. The third processing module determines whether the third temperature detection value exceeds a third threshold; if so, it controls the power module to shut down. The fourth processing module determines whether the difference between the second and third temperature detection values exceeds a fourth threshold; if so, it controls the power module to shut down. The fifth processing module determines whether the third temperature detection value exceeds a fifth threshold, and whether the first and second temperature detection values are simultaneously less than a sixth threshold; if so, it controls the power module to shut down.
[0017] This application's technical solution incorporates a temperature protection device, comprising a temperature detection value acquisition module, a first processing module, a second processing module, a third processing module, a fourth processing module, and a fifth processing module. The temperature detection value acquisition module acquires the temperature detection values from the first, second, and third temperature detection units. The first processing module determines whether the first temperature detection value exceeds a first threshold, the second processing module determines whether the second temperature detection value exceeds a second threshold, the third processing module determines whether the third temperature detection value exceeds a third threshold, the fourth processing module determines whether the difference between the second and third temperature detection values exceeds a fourth threshold, and the fifth processing module determines whether the third temperature detection value exceeds a fifth threshold, and whether both the first and second temperature detection values are simultaneously less than a sixth threshold. By implementing this temperature protection device, the outlet temperature of the cooling channel, the DC-DC module temperature, the PFC module temperature, and the DBSRC module temperature can be detected in a timely manner. When the detected temperature exceeds a preset temperature, the corresponding module can be shut down, which improves the safety and reliability of the motor controller operation. Furthermore, based on the temperature difference and temperature change detected by the first temperature detection unit, the second temperature detection unit, and the third temperature detection unit, it is possible to determine whether there are any abnormalities or extreme operating conditions inside the cooling channel. This is beneficial for timely monitoring of the temperature inside the motor controller, protecting the motor controller, and also reduces the number of NTCs on the PCB, which helps to reduce costs.
[0018] Fourthly, embodiments of this application provide a motor controller, which includes a temperature detection structure according to any of the preceding embodiments of the first aspect of this application, and the motor controller executes a temperature protection method according to any of the preceding embodiments of the second aspect of this application.
[0019] This application's technical solution incorporates a temperature detection structure within the motor controller. This structure includes a cooling channel, with a first temperature detection unit at the outlet of the cooling channel. This first unit promptly monitors the temperature at the outlet, ensuring the normal operation of the cooling liquid within the channel. A second temperature detection unit is positioned between adjacent power modules along the cooling path, enabling timely monitoring of the power module's temperature. Furthermore, by analyzing the temperature differences and changes detected by the first, second, and third units, the system can determine if any abnormalities or extreme operating conditions exist within the cooling channel. This facilitates timely monitoring of the motor controller's internal temperature, protecting it. Additionally, the use of the first and second temperature detection units to monitor the cooling channel's internal temperature and the power module's temperature reduces the number of NTCs on the PCB, thus lowering costs. The temperature detection structure provides temperature protection for the power modules, promptly monitoring the outlet temperature of the cooling channel, the DC-DC module temperature, the PFC module temperature, and the DBSRC module temperature. When the detected temperature exceeds a preset temperature, the corresponding module can be shut down, enhancing the safety and reliability of the motor controller's operation. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of one embodiment of the temperature detection structure of this application;
[0021] Figure 2 This is a schematic diagram of the cooling channel in one embodiment of the temperature detection structure of this application;
[0022] Figure 3 This is a schematic diagram of the structure of an embodiment of the motor controller of this application;
[0023] Figure 4 This is a schematic flowchart illustrating the steps of controlling the power module to start and stop in one embodiment of the temperature protection method of this application.
[0024] Figure 5 This is a schematic flowchart illustrating the steps of controlling the power module to start and stop in another embodiment of the temperature protection method of this application;
[0025] Figure 6 This is a schematic flowchart illustrating the steps of controlling the power module to start and stop in another embodiment of the temperature protection method of this application;
[0026] Figure 7 This is a schematic flowchart illustrating the steps of controlling the power module to start and stop in another embodiment of the temperature protection method of this application;
[0027] Figure 8 A schematic flowchart illustrating the steps of controlling the power module to turn on and off is also provided for an embodiment of the temperature protection method of this application.
[0028] Figure 9 This is a schematic diagram of the structure of an embodiment of the temperature protection device of this application.
[0029] Explanation of icon numbers:
[0030] Cooling channel -100, first temperature detection unit -200, second temperature detection unit -300, third temperature detection unit -400, PFC module -500, DBSRC module -600, DC-DC module -700, control module -800;
[0031] Shell-110, liquid outlet-120, liquid inlet-130, first water channel section-140, second water channel section-150. Detailed Implementation
[0032] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.
[0033] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.
[0034] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.
[0035] This application provides a temperature detection structure, a temperature protection method and device, and a motor controller, which can help monitor the internal temperature of the motor controller in a timely manner, protect the motor controller, and reduce production costs.
[0036] like Figure 1 As shown, this application embodiment provides a temperature detection structure, which includes: a cooling channel 100, multiple power modules arranged along the cooling path of the cooling channel 100, and a cooling liquid that can flow into the cooling channel 100 to dissipate heat from the multiple power modules. Figures 1 to 2 As shown, the cooling channel 100 includes a housing 110, a liquid outlet 120, and a liquid inlet 130, allowing the cooling liquid to flow within the housing 110. A first temperature detection unit 200 is installed at the liquid outlet 120 of the cooling channel 100, and a second temperature detection unit 300 is installed between two adjacent power modules along the cooling path.
[0037] This application's technical solution incorporates a cooling channel 100 within a temperature detection structure. A first temperature detection unit 200 is installed at the outlet 120 of the cooling channel 100. The first temperature detection unit 200 promptly detects the temperature at the outlet 120 of the cooling channel 100, ensuring the normal operation of the cooling liquid inside the cooling channel 100. A second temperature detection unit 300 is installed between two adjacent power modules along the cooling path, enabling timely detection of the power module's temperature. Furthermore, based on the temperature difference and changes detected by the first and second temperature detection units 200 and 300, it is possible to determine whether any abnormalities or extreme operating conditions exist within the cooling channel 100. This facilitates timely monitoring of the motor controller's internal temperature, protecting the motor controller.
[0038] Furthermore, by setting up a first temperature detection unit 200 and a second temperature detection unit 300 to detect the internal temperature of the cooling channel 100 and the temperature of multiple power modules on the cooling path, the number of negative temperature coefficient thermistors (NTCs) on the printed circuit board (PCB) can be reduced, which is beneficial to reducing costs.
[0039] like Figures 1 to 2As shown, the cooling channel 100 includes a first water channel section 140 and a second water channel section 150 connected in series. The first water channel section 140 and the second water channel section 150 are, but are not limited to, U-shaped or L-shaped arrangements. The cooling liquid flows from the first water channel section 140 to the second water channel section 150. The first water channel section 140 and the second water channel section 150 are each equipped with multiple power modules. The power modules installed on any water channel section include a power factor correction (PFC) module 500, a dual bridge series resonant converter (DBSRC) module 600, and a direct current-to-direct current (DC-DC) power supply module 700.
[0040] like Figure 3 As shown, the second temperature detection unit 300 is located between the first water channel section 140 and the second water channel section 150. Since a PFC module 500 and a DBSRC module 600 are respectively installed on the first water channel section 140 and the second water channel section 150, and the PFC module 500 and DBSRC module 600 on the first water channel section 140 and the second water channel section 150 have the same model, parameters, and operating status, the heat generated by the PFC module 500 and DBSRC module 600 in the first water channel section 140 and the second water channel section 150 can be considered equivalent. Therefore, the temperature of the PFC module 500 and DBSRC module 600 on the first water channel section 140 and the second water channel section 150 can be detected by a single second temperature detection unit 300. By placing the second temperature detection unit 300 between the first water channel section 140 and the second water channel section 150, the temperature of the PFC module 500 and the DBSRC module 600 on the first water channel section 140 and the second water channel section 150 can be more accurately represented.
[0041] like Figure 3 As shown, the temperature detection structure also includes a third temperature detection unit 400, which is located close to the DC-DC module 700 and is used to detect the temperature of the DC-DC module 700. The third temperature detection unit 400 is a surface-mount NTC, which is mounted on the PCB. The third temperature detection unit 400 is located approximately 5mm from the synchronous rectifier diode of the DC-DC module 700.
[0042] In this embodiment, at least a portion of the structure of the first temperature detection unit 200 is in contact with the housing 110 of the cooling channel 100. The first temperature detection unit 200 can detect the temperature of the housing 110 of the cooling channel 100 at the contact point. Since the power transistor of the DC-DC module 700 is attached to the cooling channel 100, and the DC-DC module 700 on the second water channel section 150 is close to the liquid outlet 120, the temperature can be conducted through the housing 110 of the cooling channel 100 to the detection point of the first temperature detection unit 200. The first temperature detection unit 200 is advantageous in realizing the functions of temperature detection of the DC-DC module 700 and temperature detection of the cooling channel 100.
[0043] like Figure 3 As shown, preferably, the second temperature detection unit 300 is positioned close to the PFC module on the first water channel section 140. Since the PFC module 500 is the power module with the highest heat generation in the motor controller, the multiple power transistors in the PFC module 500 can conduct heat to the detection point of the second temperature detection unit 300 through the housing 110 of the cooling channel 100. This helps to reduce thermal resistance and improve response speed, so that the second temperature detection unit 300 can detect the temperature of the PFC module 500 in a timely manner. In other embodiments, since the heat generated by the PFC modules 500 in the first water channel section 140 and the second water channel section 150 can be considered equivalent, the second temperature detection unit 300 can also be positioned close to the PFC module on the second water channel section 150.
[0044] By setting a first temperature detection unit 200 and a second temperature detection unit 300 in the temperature detection structure, the first temperature detection unit 200 can detect the temperature of the coolant inside the cooling channel 100 and can also detect the temperature of the DC-DC module 700 at the same time. The second temperature detection unit 300 can also detect the temperature of the PFC module 500. This not only speeds up the temperature response speed, but also helps to reduce the number of surface-mount NTCs on the PCB, thereby reducing the pin resources occupied and reducing costs.
[0045] In one embodiment, the first temperature detection unit 200 and / or the second temperature detection unit 300 include a temperature probe that can be inserted into the cooling channel 100 to detect the temperature of the cooling liquid. Preferably, the housing 110 of the cooling channel 100 has a connection hole for inserting the temperature probe, and a thermally conductive medium, such as thermally conductive adhesive, is disposed at the connection hole to further enhance the heat conduction effect. In another embodiment, the first temperature detection unit 200 and / or the second temperature detection unit 300 include a patch-type thermal sensor that is attached to the inner wall of the cooling channel 100 to detect the temperature of multiple power modules along the cooling path of the cooling channel 100. This application does not limit the form of the first temperature detection unit 200 and the second temperature detection unit 300.
[0046] like Figure 3 As shown, the temperature detection structure also includes a control module 800. The control module 800 is electrically connected to the power module, the first temperature detection unit 200, the second temperature detection unit 300, and the third temperature detection unit 400. The control module 800 is located close to the first waterway section 140, which helps to shorten the wiring path and facilitates the electrical connection between the control module 800 and the first temperature detection unit 200, the second temperature detection unit 300, and the third temperature detection unit 400.
[0047] like Figures 4 to 6 As shown, this application embodiment also provides a temperature protection method, which uses the temperature detection structure of any of the foregoing embodiments of this application to protect the power module from temperature.
[0048] like Figure 4 As shown, the temperature protection method includes steps S110 to S150.
[0049] In step S110, the first temperature detection unit 200 is acquired to obtain the first temperature detection value. The first temperature detection unit 200 can detect the temperature of the liquid outlet 120 of the cooling channel 100.
[0050] In step S120, it is determined whether the first temperature detection value exceeds the first threshold.
[0051] In step S130, if so, the power module is shut down.
[0052] In step S140, it is determined whether the first temperature detection value has dropped below the first threshold.
[0053] In step S150, if so, the power module is powered on.
[0054] It should be noted that the temperature detected by the first temperature detection unit 200 within the cooling channel 100 can be used to determine whether derating or shutdown is necessary, in order to ensure the safety and reliability of the motor controller's operation. For example, in one embodiment, if the first temperature detection value exceeds 65°C, the output power of the power module inside the motor controller can be reduced; if the first temperature detection value exceeds 80°C, the power module inside the motor controller can be shut down.
[0055] like Figure 5 As shown, the temperature protection method further includes steps S210 to S250.
[0056] In step S210, the temperature detection value of the second temperature detection unit 300 is obtained, and the second temperature detection value is obtained. The second temperature detection unit 300 can detect the temperature of the PFC module 500 and the DBSRC module 600.
[0057] In step S220, it is determined whether the second temperature detection value exceeds the second threshold.
[0058] In step S230, if so, the power module is powered off.
[0059] In step S240, it is determined whether the second temperature detection value has dropped below the second threshold.
[0060] In step S250, if so, the power module is powered on.
[0061] In one implementation, the temperatures of the PFC module 500 and DBSRC module 600 can be determined to be approximately the temperature within the cooling channel 100 after a non-derating test. For example, if the second temperature detection value exceeds 72°C, a derating temperature can be triggered to reduce the output power of the motor controller power module; if the second temperature detection value exceeds 85°C, the power module can be shut down.
[0062] like Figure 6 As shown, the temperature protection method further includes steps S310 to S350.
[0063] In step S310, the temperature detection value of the third temperature detection unit 400 is obtained, and the third temperature detection value is obtained. The third temperature detection unit 400 can detect the temperature of the DC-DC module 700.
[0064] In step S320, it is determined whether the third temperature detection value exceeds the third threshold.
[0065] In step S330, if so, the power module is shut down.
[0066] In step S340, it is determined whether the third temperature detection value has dropped below the third threshold.
[0067] In step S350, if so, the power module is powered on.
[0068] The DC-DC module 700 can be monitored and protected by combining the first temperature detection unit 200 and the third temperature detection unit 400, according to actual needs. For example, when the ambient temperature is 85℃ and the DC-DC module 700 is running at full load with a power of 2.5kW, if the third temperature detection value reaches 125℃ and the first temperature detection value reaches 70℃, the derating temperature can be triggered to reduce the output power of the power module inside the motor controller; if the third temperature detection value reaches 130℃, the power module can be shut down.
[0069] like Figure 6 As shown, the temperature protection method also includes steps S410 to S450. Under extreme operating conditions, such as extremely low external temperatures or damage to the water cooling system, the second temperature detection unit 300 and the third temperature detection unit 400 can collect temperature data from each temperature detection point and formulate a temperature protection strategy based on the temperature data. Introducing the temperature protection method into the control module 800 facilitates temperature protection under various operating conditions.
[0070] In step S410, the temperature detection values of the second temperature detection unit 300 and the third temperature detection unit 400 are obtained, and the second temperature detection value and the third temperature detection value are obtained respectively. The second temperature detection unit 300 can detect the temperature of the PFC module 500 and the DBSRC module 600, and the third temperature detection unit 400 can detect the temperature of the DC-DC module 700.
[0071] In step S420, it is determined whether the difference between the second temperature detection value and the third temperature detection value exceeds the fourth threshold.
[0072] In step S430, if so, the power module is shut down.
[0073] In step S440, it is determined whether the difference between the second temperature detection value and the third temperature detection value has dropped below the fourth threshold.
[0074] In step S450, if so, the power module is powered on.
[0075] When the PFC module 500, DBSRC module 600, and DC-DC module 700 are operating simultaneously, if the second temperature detection value exceeds the third temperature detection value by 40°C or more, meaning the temperature of the PFC module 500 and DBSRC module 600 exceeds the temperature of the DC-DC module 700 by 40°C or more, the control module 800 determines that the internal water cooling system of the motor controller has failed and controls the power module to shut down for protection. Once the temperature difference between the second and third temperature detection values drops to within the normal range, such as less than 35°C, the control module restarts.
[0076] like Figure 7 As shown, the temperature protection method further includes steps S510 to S550.
[0077] In step S510, the temperature detection values of the first temperature detection unit 200, the second temperature detection unit 300, and the third temperature detection unit 400 are obtained, and the first temperature detection value, the second temperature detection value, and the third temperature detection value are obtained respectively. The first temperature detection unit 200 can detect the temperature of the liquid outlet 120 of the cooling channel 100, the second temperature detection unit 300 can detect the temperature of the PFC module 500 and the DBSRC module 600, and the third temperature detection unit 400 can detect the temperature of the DC-DC module 700.
[0078] In step S520, it is determined whether the third temperature detection value exceeds the fifth threshold, and whether the first temperature detection value and the second temperature detection value are simultaneously less than the sixth threshold.
[0079] In step S530, if so, the power module is shut down.
[0080] In step S540, it is determined whether the third temperature detection value drops below the fifth threshold and whether the first temperature detection value and the second temperature detection value simultaneously exceed the sixth threshold.
[0081] In step S550, if so, the power module is powered on.
[0082] When only the DC-DC module 700 is operating in the power supply module, if the third temperature detection value is greater than 80℃, and the first and second temperature detection values are simultaneously less than 40℃, it can be determined that the temperature of the DC-DC module 700 is greater than 80℃, while the temperatures of the PFC module 500, DBSRC module 600, and the temperature within the cooling channel 100 are simultaneously less than 40℃. This indicates a water cooling system fault, and the power module is shut down for protection. Once the third temperature detection value drops to within the normal range, such as below 75℃, the power module is restarted.
[0083] It should be noted that those skilled in the art can determine the normal preset temperature and abnormal temperature detected by the first temperature detection unit 200, the second temperature detection unit 300, and the third temperature detection unit 400 according to actual needs, so as to better protect and monitor the temperature inside the motor controller.
[0084] The temperature protection method in this application protects the power module by means of the temperature detection structure in any of the aforementioned embodiments of this application. The temperature protection method includes: acquiring the temperature detection values of the first temperature detection unit 200, the second temperature detection unit 300, and the third temperature detection unit 400, respectively obtaining the first temperature detection value, the second temperature detection value, and the third temperature detection value; determining whether the first temperature detection value exceeds a first threshold; if so, controlling the power module to shut down; determining whether the second temperature detection value exceeds a second threshold; if so, controlling the power module to shut down; determining whether the third temperature detection value exceeds a third threshold; if so, controlling the power module to shut down. The system performs several temperature detection steps: First, it shuts down the power module. Second, it checks if the difference between the second and third temperature detection values exceeds a fourth threshold. If so, it shuts down the power module. Third, it checks if the third temperature detection value exceeds a fifth threshold, and if both the first and second temperature detection values are less than a sixth threshold. If so, it shuts down the power module. The temperature detection structure monitors the temperatures of the cooling channel 100 outlet 120, the DC-DC module 700, the PFC module 500, and the DBSRC module 600 in real time. If the detected temperature exceeds a preset temperature, the corresponding module can be shut down, improving the safety and reliability of the motor controller. Furthermore, based on the temperature difference and changes detected by the first, second, and third temperature detection units 200, 300, and 400, it can determine if there are any abnormalities or extreme conditions inside the cooling channel 100. This allows for timely monitoring of the motor controller's internal temperature, protecting the motor controller and reducing the number of NTCs on the PCB, thus lowering costs.
[0085] like Figure 7 As shown in the embodiment of this application, a temperature protection device is also provided, which includes: a temperature detection value acquisition module 10, a first processing module 20, a second processing module 30, a third processing module 40, a fourth processing module 50, and a fifth processing module 60.
[0086] The temperature detection value acquisition module 10 is used to acquire the temperature detection values of the first temperature detection unit 200, the second temperature detection unit 300 and the third temperature detection unit 400.
[0087] The first processing module 20 is used to determine whether the first temperature detection value exceeds the first threshold. If so, it controls the power module to shut down.
[0088] The second processing module 30 is used to determine whether the second temperature detection value exceeds the second threshold. If so, it controls the power module to shut down.
[0089] The third processing module 40 is used to determine whether the third temperature detection value exceeds the third threshold. If so, it controls the power module to shut down.
[0090] The fourth processing module 50 is used to determine whether the difference between the second temperature detection value and the third temperature detection value exceeds the fourth threshold. If so, the power module is controlled to shut down.
[0091] The fifth processing module 60 is used to determine whether the third temperature detection value exceeds the fifth threshold and whether the first temperature detection value and the second temperature detection value are both less than the sixth threshold. If so, the power module is controlled to shut down.
[0092] This application's technical solution incorporates a temperature protection device, which includes a temperature detection value acquisition module 10, a first processing module 20, a second processing module 30, a third processing module 40, a fourth processing module 50, and a fifth processing module 60. The temperature detection value acquisition module 10 acquires the temperature detection values from the first temperature detection unit 200, the second temperature detection unit 300, and the third temperature detection unit 400. The first processing module 20 determines whether the first temperature detection value exceeds a first threshold, the second processing module 30 determines whether the second temperature detection value exceeds a second threshold, and the third processing module 40 determines whether the third temperature detection value exceeds a second threshold. If the temperature exceeds the third threshold, the fourth processing module 50 can determine whether the difference between the second and third temperature detection values exceeds the fourth threshold, and the fifth processing module 60 can determine whether the third temperature detection value exceeds the fifth threshold, and whether the first and second temperature detection values are simultaneously less than the sixth threshold. By setting a temperature protection device, the temperature of the outlet 120 of the cooling channel 100, the DC-DC module 700, the PFC module 500, and the DBSRC module 600 can be detected in a timely manner. After the detected temperature exceeds the preset temperature, the corresponding module can be shut down, which helps to improve the safety and reliability of the motor controller. Furthermore, based on the temperature difference and temperature change detected by the first temperature detection unit 200, the second temperature detection unit 300, and the third temperature detection unit 400, it is possible to determine whether there are any abnormalities or extreme operating conditions inside the cooling channel 100. This helps to monitor the internal temperature of the motor controller in a timely manner, protect the motor controller, and reduce the number of NTCs on the PCB, thus reducing costs.
[0093] like Figure 3As shown, this application embodiment also provides a motor controller, which includes the temperature detection structure of any of the foregoing embodiments of this application, and the motor controller executes the temperature protection method of any of the foregoing embodiments of this application. Figure 1 As shown, the temperature detection structure includes: a cooling channel 100, multiple power modules arranged on the cooling path of the cooling channel 100, cooling liquid being able to flow into the cooling channel 100 to dissipate heat from the multiple power modules, a first temperature detection unit 200 being arranged at the outlet 120 of the cooling channel 100, and a second temperature detection unit 300 being arranged between two adjacent power modules on the cooling path.
[0094] This application's technical solution incorporates a temperature detection structure within the motor controller. This structure includes a cooling channel 100, with a first temperature detection unit 200 positioned at the outlet 120 of the cooling channel 100. The first temperature detection unit 200 promptly detects the temperature at the outlet 120 of the cooling channel 100, ensuring the normal operation of the cooling liquid within the cooling channel 100. A second temperature detection unit 300 is positioned between two adjacent power modules along the cooling path, enabling timely detection of the power module temperature. Furthermore, based on the temperature difference and changes detected by the first and second temperature detection units 200 and 300, it is possible to determine whether any abnormalities or extreme operating conditions exist within the cooling channel 100. This facilitates timely monitoring of the motor controller's internal temperature, protecting it. Moreover, by using the first and second temperature detection units 200 and 300 to detect the temperature inside the cooling channel 100 and the power module temperature, the number of NTCs on the PCB can be reduced, thus lowering costs. The temperature detection structure can detect the temperature of the liquid outlet 120 of the cooling channel 100, the temperature of the DC-DC module 700, the temperature of the PFC module 500 and the DBSRC module 600 in a timely manner. When the detected temperature exceeds the preset temperature, the corresponding module can be shut down, which helps to improve the safety and reliability of the motor controller operation.
[0095] The above description is merely a preferred embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the inventive concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.
Claims
1. A temperature detection structure, characterized in that, The temperature detection structure includes: A cooling channel (100) is provided, and multiple power modules are arranged on the cooling path of the cooling channel (100). Cooling liquid can be introduced into the cooling channel (100) to dissipate heat from the multiple power modules. A first temperature detection unit (200) is provided at the outlet (120) of the cooling channel (100), and a second temperature detection unit (300) is provided between two adjacent power modules on the cooling path.
2. The temperature detection structure as described in claim 1, characterized in that, The temperature detection structure also includes a third temperature detection unit (400), which is located near the power module of the liquid inlet of the cooling channel (100).
3. The temperature detection structure as described in claim 1, characterized in that, The cooling channel (100) includes a first water channel section (140) and a second water channel section (150) arranged in series. Each of the first water channel section (140) and the second water channel section (150) is provided with a plurality of power modules. The second temperature detection unit (300) is located between the first water channel section (140) and the second water channel section (150).
4. The temperature detection structure as described in claim 3, characterized in that, The power modules installed on any waterway section include a PFC module (500), a DBSRC module (600), and a DC-DC module (700).
5. The temperature detection structure as described in claim 4, characterized in that, Cooling liquid flows from the first water channel section (140) to the second water channel section (150), and the second temperature detection unit (300) is positioned close to the PFC module (500) on the first water channel section (140).
6. The temperature detection structure as described in claim 3, characterized in that, The temperature detection structure also includes a control module (800), which is located near the first waterway section (140).
7. The temperature detection structure as described in any one of claims 1 to 6, characterized in that, The first temperature detection unit (200) and / or the second temperature detection unit (300) include a temperature probe that can be inserted into the cooling channel (100) to detect the temperature of the cooling liquid.
8. The temperature detection structure according to any one of claims 1 to 6, characterized in that, The first temperature detection unit (200) and / or the second temperature detection unit (300) include a patch thermal sensor, which is attached to the inner wall of the cooling channel (100).
9. A temperature protection method, characterized in that, Temperature protection of the power module is achieved through a temperature detection structure as described in any one of claims 2 to 8, wherein the temperature protection method includes: The temperature detection values of the first temperature detection unit (200), the second temperature detection unit (300) and the third temperature detection unit (400) are obtained respectively to obtain the first temperature detection value, the second temperature detection value and the third temperature detection value. The first temperature detection unit (200) can detect the temperature of the liquid outlet (120) of the cooling channel (100), the second temperature detection unit (300) can detect the temperature of the PFC module (500) and the DBSRC module (600), and the third temperature detection unit (400) can detect the temperature of the DC-DC module (700). Determine whether the first temperature detection value exceeds the first threshold; if so, control the power module to shut down. Determine whether the second temperature detection value exceeds the second threshold; if so, control the power module to shut down. Determine whether the third temperature detection value exceeds the third threshold; if so, control the power module to shut down. Determine whether the difference between the second temperature detection value and the third temperature detection value exceeds a fourth threshold. If so, control the power module to shut down. Determine whether the third temperature detection value exceeds the fifth threshold, and whether the first temperature detection value and the second temperature detection value are both less than the sixth threshold. If so, control the power module to shut down.
10. The temperature protection method as described in claim 9, characterized in that, The temperature protection method further includes: Determine whether the first temperature detection value has dropped below the first threshold; if so, control the power module to turn on. Determine whether the second temperature detection value has dropped below the second threshold; if so, control the power module to turn on. Determine whether the third temperature detection value has dropped below the third threshold; if so, control the power module to turn on. Determine whether the difference between the second temperature detection value and the third temperature detection value drops below the fourth threshold. If so, control the power module to turn on. If the third temperature detection value drops below the fifth threshold and the first and second temperature detection values both exceed the sixth threshold, then the power module is powered on.
11. A temperature protection device, characterized in that, The temperature protection device includes: Temperature detection value acquisition module (10) is used to acquire the temperature detection values of the first temperature detection unit (200), the second temperature detection unit (300) and the third temperature detection unit (400); The first processing module (20) is used to determine whether the first temperature detection value exceeds the first threshold. If so, the power module is controlled to shut down. The second processing module (30) is used to determine whether the second temperature detection value exceeds the second threshold. If so, the power module is controlled to shut down. The third processing module (40) is used to determine whether the third temperature detection value exceeds the third threshold. If so, the power module is controlled to shut down. The fourth processing module (50) is used to determine whether the difference between the second temperature detection value and the third temperature detection value exceeds the fourth threshold. If so, the power module is controlled to shut down. The fifth processing module (60) is used to determine whether the third temperature detection value exceeds the fifth threshold and whether the first temperature detection value and the second temperature detection value are both less than the sixth threshold. If so, the power module is controlled to shut down.
12. A motor controller, characterized in that, The motor controller includes a temperature detection structure as described in any one of claims 1 to 8, and the motor controller executes a temperature protection method as described in any one of claims 9 to 10.