Motor junction box detection system and method and vehicle

Abstract

The invention relates to a motor junction box detection system and method and a vehicle, and relates to the field of automatic control, the motor junction box detection system is applied to the vehicle, the motor junction box detection system comprises a temperature sensor, a cooling assembly and a controller, the controller is connected with the cooling assembly and the temperature sensor, the cooling assembly comprises a cooling water path, and the cooling water path is connected with the temperature sensor. The cooling water path is connected with a motor expansion water tank and a heat dissipation pump of the vehicle, and the cooling water path is arranged around a plurality of wiring terminals in the motor junction box in a surrounding manner; the temperature sensor is used for detecting the temperature in the motor junction box; and the controller is used for controlling the cooling water channel to reduce the temperature of the motor junction box under the condition that the temperature in the motor junction box is greater than or equal to a preset first temperature threshold value. According to the technical scheme, under the condition that the temperature is larger than or equal to the first temperature threshold value, active cooling is conducted through the cooling assembly.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of automatic control, and in particular to a motor terminal box detection system, method and vehicle. BACKGROUND

[0002] The driving motor is an electromechanical energy conversion device of a new energy vehicle power system, mainly used for driving the vehicle to travel and braking energy recovery, and its reliability directly affects the driving safety. The high-voltage terminal box is a component for optimal power distribution between high-voltage electronic components, connected to the high-voltage battery through high-voltage cables and high-voltage connectors, and responsible for power distribution to various electronic devices.

[0003] However, the motor terminal box may be ablated, on fire, smoke, and insulated due to the long-term heating of the high-voltage terminal. The current vehicle motor detection method only detects the rotor temperature of the motor, and cannot reduce the ablation risk of the high-voltage wiring harness. SUMMARY

[0004] To overcome the problems in the related art, the present disclosure provides a motor terminal box detection system, method and vehicle.

[0005] According to a first aspect of an embodiment of the present disclosure, a motor terminal box detection system is provided, applied to a vehicle, the detection system comprising a temperature sensor, a cooling assembly and a controller, the controller being connected with the cooling assembly and the temperature sensor respectively, the cooling assembly comprising a cooling water circuit, the cooling water circuit being connected with a motor expansion water tank and a heat dissipation pump of the vehicle, the cooling water circuit being arranged around a plurality of terminal pins arranged inside the motor terminal box; The temperature sensor is configured to detect the temperature in the motor terminal box. The controller is configured to control the cooling water circuit to reduce the temperature of the motor terminal box when the temperature in the motor terminal box is greater than or equal to a preset first temperature threshold.

[0006] In one embodiment, the temperature sensor is arranged on the plurality of terminal pins.

[0007] In one embodiment, the cooling assembly further comprises a valve, the controller being connected with the valve, and the cooling water circuit being connected with the motor expansion water tank and the heat dissipation pump through the valve; The valve is configured to control the flow of the cooling liquid in the cooling water circuit. The controller is further configured to control the opening or closing of the valve.

[0008] In one embodiment, the shape of the cooling water circuit comprises a U shape.

[0009] In an embodiment, the controller is further configured to output first warning information when the temperature of the motor terminal box is greater than or equal to a preset second temperature threshold, the first warning information being used to indicate that the motor terminal box has a high-temperature fault, and the second temperature threshold is greater than the first temperature threshold.

[0010] In an embodiment, the controller is further configured to reduce the power of the driving motor when the temperature of the motor terminal box is greater than or equal to a preset second temperature threshold.

[0011] In an embodiment, the motor terminal box further comprises a humidity sensor configured to detect the humidity in the motor terminal box, the humidity sensor being arranged inside the housing of the motor terminal box, and the controller is connected to the humidity sensor, and the controller is further configured to output second warning information when the humidity of the motor terminal box is greater than or equal to a preset humidity threshold, the second warning information being used to indicate that the motor terminal box has a sealing fault.

[0012] In an embodiment, the controller is a vehicle controller.

[0013] According to a second aspect of the embodiments of the present disclosure, a motor terminal box detection method is provided, which is applied to a motor terminal box detection system. The detection system comprises a temperature sensor, a cooling assembly, and a controller. The controller is connected to the cooling assembly and the temperature sensor, respectively. The cooling assembly comprises a cooling water circuit. The cooling water circuit is connected to a motor expansion tank and a heat pump of a vehicle. The cooling water circuit is arranged around a plurality of terminal posts arranged inside the motor terminal box. The method comprises the following steps: obtaining the temperature of the motor terminal box detected by the temperature sensor; when the temperature of the motor terminal box is greater than or equal to a preset first temperature threshold, controlling the cooling water circuit to reduce the temperature of the motor terminal box.

[0014] According to a third aspect of the embodiments of the present disclosure, a vehicle is provided, which comprises the motor terminal box detection system provided in the first aspect of the present disclosure.

[0015] With the above technical solution, a temperature sensor and a cooling assembly are added in the motor terminal box. The cooling assembly comprises a cooling water circuit. The cooling water circuit is connected to a motor expansion tank and a heat pump of a vehicle. The cooling water circuit is arranged around a plurality of terminal posts arranged inside the motor terminal box. Not only the temperature of the motor terminal box can be detected, but also the cooling water circuit can be used for active cooling when the temperature of the motor terminal box is greater than or equal to a preset first temperature threshold. The possibility of faults such as ablation, fire, smoke, and insulation of the motor terminal box due to high temperature is reduced, thereby ensuring the safety of the vehicle.

[0016] Other features and advantages of the present disclosure will be described in detail in the following detailed description of specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0017] The accompanying drawings are included to provide a further understanding of the present disclosure and constitute a part of the specification, help to explain the present disclosure and are used to explain the present disclosure together with the following detailed description, but do not constitute a limitation of the present disclosure.

[0018] Figure 1 is a block diagram of a motor junction box detection system according to an exemplary embodiment.

[0019] Figure 2 is a block diagram of another motor junction box detection system according to an exemplary embodiment.

[0020] Figure 3A is a structural diagram of a motor junction box according to an exemplary embodiment.

[0021] Figure 3B is a working principle diagram of a cooling assembly according to an exemplary embodiment.

[0022] Figure 4 is a flowchart of a motor junction box detection method according to an exemplary embodiment.

[0023] Figure 5 is a block diagram of an electronic device according to an exemplary embodiment.

[0024] Figure 6 is a block diagram of a vehicle according to an exemplary embodiment. DETAILED DESCRIPTION

[0025] The detailed description of the present disclosure is described below with reference to the accompanying drawings. It should be understood that the detailed description described herein is only used to explain and illustrate the present disclosure, and is not used to limit the present disclosure.

[0026] It should be noted that all actions of obtaining signals, information or data in the present application are carried out in accordance with the corresponding data protection regulations and policies of the country where the device is located, and with the authorization of the corresponding device owner.

[0027] The terms "first", "second", and the like in the specification and claims of the present disclosure and the above-described drawings are used to distinguish similar objects, and do not necessarily mean a specific order or sequence. In addition, in the description with reference to the drawings, the same reference signs in different drawings represent the same elements.

[0028] In the description of the present disclosure, unless otherwise specified, "a plurality of" refers to two or more than two, and other quantifiers are similar thereto; "at least one", "one or more" or similar expressions refer to any combination of these items, including any combination of single or multiple items. For example, at least one a can represent any number of a; for another example, one or more of a, b and c can represent: a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, c can be single or multiple; "and / or" is a description of the relationship between the associated objects, which means that there can be three relationships, for example, A and / or B can represent: A exists alone, A and B exist together, and B exists alone, where A and B can be singular or plural. The character " / " represents an "or" relationship between the associated objects.

[0029] Although the operations or steps are described in a specific order in the accompanying drawings in the embodiments of the present disclosure, it should not be understood as requiring the operations or steps to be performed in the specific order or serial order shown, or requiring all the operations or steps to be performed to obtain the desired results. In the embodiments of the present disclosure, the operations or steps can be performed in series; the operations or steps can also be performed in parallel; and a part of the operations or steps can be performed.

[0030] Firstly, the application scenario of the present disclosure is described.

[0031] The driving motor is an electromechanical energy conversion device of a new energy vehicle power system, mainly used for driving the vehicle to travel and braking energy recovery, and its reliability directly affects the driving safety. The high-voltage junction box is a component that optimally distributes power between high-voltage electronic components, connected to the high-voltage battery through high-voltage cables and high-voltage connectors, and is responsible for power distribution to each electronic device.

[0032] However, the motor junction box will cause the conductive performance of the connection to decrease significantly due to the heating of the terminal. If the high-voltage terminal cannot be cooled in time due to long-term heating, it will cause burning, fire, smoke, and insulation failure.

[0033] At present, the temperature detection scheme for the driving motor is to add a set of temperature sensors in the motor stator, which can feedback the current motor temperature (coil temperature) through resistance change, but cannot detect the temperature and waterproof performance of the motor high-voltage junction box, nor can it effectively prevent the motor high-voltage terminal from burning, high temperature, and insulation failure.

[0034] To solve the above problems, the present disclosure provides an electric motor junction box detection system, method and vehicle. The electric motor junction box detection system is applied to a vehicle and includes a temperature sensor, a cooling assembly and a controller. The controller is connected with the cooling assembly and the temperature sensor respectively. The cooling assembly includes a cooling water circuit. The cooling water circuit is connected with an electric motor expansion tank and a heat pump of the vehicle and surrounds a plurality of terminal pins arranged inside the electric motor junction box. The temperature sensor is used to detect the temperature inside the electric motor junction box. The controller is used to control the cooling water circuit to reduce the temperature of the electric motor junction box when the temperature inside the electric motor junction box is greater than or equal to a preset first temperature threshold. In this way, the temperature sensor and the cooling assembly are added to the electric motor junction box. The cooling assembly includes the cooling water circuit which is connected with the electric motor expansion tank and the heat pump of the vehicle and surrounds the plurality of terminal pins arranged inside the electric motor junction box. Not only can the temperature of the electric motor junction box be detected, but also the cooling assembly can be used to actively cool when the temperature is greater than or equal to the preset first temperature threshold. The possibility of ablation, fire, smoke and insulation failure of the electric motor junction box due to high temperature is reduced, thereby ensuring the safety of the vehicle.

[0035] The specific embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings.

[0036] Figure 1 is a block diagram of an electric motor junction box detection system 100 according to an exemplary embodiment. As shown in Figure 1 the electric motor junction box detection system 100 is applied to a vehicle. The detection system includes a temperature sensor 101, a cooling assembly 102 and a controller 103. The controller 103 is connected with the cooling assembly 102 and the temperature sensor 101 respectively. The cooling assembly 102 includes a cooling water circuit 1021. The cooling water circuit 1021 is connected with an electric motor expansion tank and a heat pump of the vehicle and surrounds a plurality of terminal pins arranged inside the electric motor junction box. Wherein, the temperature sensor 101 is used to detect the temperature inside the electric motor junction box; the controller 103 is used to control the cooling water circuit 1021 to reduce the temperature of the electric motor junction box when the temperature inside the electric motor junction box is greater than or equal to a preset first temperature threshold.

[0037] In this embodiment, the way that the controller 103 is connected with the cooling assembly 102 and the temperature sensor 101 can be electrical connection or communication connection.

[0038] In this embodiment, the first temperature threshold can be 60 degrees Celsius (℃).

[0039] In some embodiments, the temperature sensor 101 can be a thermal resistance temperature sensor. The temperature sensor 101 is configured to feed a current resistance value to the controller 103 through a Controller Area Network (CAN) bus, and the controller 103 is configured to calculate a temperature in the motor terminal box according to the current resistance value, and control the cooling assembly 102 to reduce the temperature in the motor terminal box when the temperature in the motor terminal box is greater than or equal to a preset first temperature threshold.

[0040] In some embodiments, the temperature sensor 101 is configured to detect a temperature of a terminal or a coil temperature in the motor terminal box.

[0041] In some embodiments, the controller 103 is a vehicle control unit (VCU). For example, the controller 103 can be a Vehicle control unit (VCU) configured to implement functions such as normal driving of the vehicle, braking energy feedback, energy management of the vehicle driving system and the power battery, network management, fault diagnosis and processing, vehicle state monitoring, and the like.

[0042] In some embodiments, the controller 103 can also be an ECU for controlling the engine of the vehicle. For example, the controller 103 can be an Engine Management System (EMS) configured to control functions such as fuel injection, ignition, torque distribution, and the like of the engine.

[0043] In some embodiments, the controller 103 is configured to control the active cooling mode to be started when the temperature in the motor terminal box is greater than or equal to the preset first temperature threshold, where the active cooling mode represents that the cooling assembly 102 actively reduces the temperature in the motor terminal box.

[0044] In this embodiment, the plurality of terminals are high-voltage terminals, for example, the plurality of terminals can be copper terminals.

[0045] In this embodiment, when the motor is a three-phase asynchronous motor, the number of the plurality of terminals can be three.

[0046] It can be understood that the terminal inside the motor terminal box is actually a piece of metal sheet, and although the terminal has different structures due to actual needs, regardless of the structure, the terminal has its own contact surface. Therefore, the temperature sensor 101 can be arranged above or below the contact surface of the terminal.

[0047] The aforementioned motor junction box detection system 100 adds a temperature sensor 101 and a cooling component 102 inside the motor junction box. The cooling component 102 includes a cooling water circuit 1021, which is connected to the vehicle's motor expansion tank and radiator pump. It surrounds multiple terminals inside the motor junction box, enabling the system to detect the temperature of the motor junction box and actively cool it using the cooling water circuit when the temperature is greater than or equal to a preset first temperature threshold. This reduces the possibility of the motor junction box experiencing burnout, fire, smoke, insulation failure, or other malfunctions due to excessive temperature, thereby ensuring vehicle safety.

[0048] Figure 2 This is a block diagram illustrating another motor junction box detection system 100 according to an exemplary embodiment, such as... Figure 2 As shown, the cooling component 102 in the motor junction box detection system 100 also includes a valve 1022, the controller 103 is connected to the valve 1022, and the cooling water circuit is connected to the motor expansion tank and the cooling pump through the valve 1022. Valve 1022 is used to control the flow rate of coolant in the cooling water circuit; The controller 103 is also used to control the opening or closing of the valve 1022.

[0049] In this embodiment, valve 1022 can be a solenoid valve.

[0050] In this embodiment, the coolant is the vehicle's original engine coolant, which can protect the engine and ensure its normal and good operation. It circulates in the engine water tank and has the effects of antifreeze, antiboiling, antirust, and anticorrosion.

[0051] In one possible implementation, the temperature of the motor junction box and the flow rate of the coolant have a preset correspondence. The higher the temperature of the motor junction box, the greater the flow rate of the coolant, which can accelerate the cooling speed of the motor junction box.

[0052] In some embodiments, the cooling water passage is U-shaped; in other embodiments, the cooling water passage is S-shaped or other shapes.

[0053] In another possible implementation, a groove is pre-set on the base plate of the motor junction box, and the cooling water circuit is located in the groove below multiple terminals.

[0054] By using the aforementioned motor junction box detection system 100, when the temperature of the motor junction box is too high, the valve in the cooling assembly 102 is opened, and the temperature at the terminal is reduced by the coolant in the cooling water circuit, thereby reducing the possibility of motor junction box failures such as burning, fire, smoke, and insulation failure, and thus ensuring vehicle safety.

[0055] In some embodiments, the motor terminal box is further provided with a plurality of terminal clamps inside, and the temperature sensor 101 is arranged on the plurality of terminal clamps.

[0056] For example, referring to Figure 3A The temperature sensor 101 can be pre-embedded below the contact surface of each copper terminal.

[0057] Through the above motor terminal box detection system 100, the temperature sensor 101 is arranged on the terminal clamps inside the motor terminal box, which realizes temperature detection of the high-voltage box, effectively avoids problems such as burning, high temperature, vehicle fire and smoke caused by high-voltage wire harness, and improves the service life of the high-voltage wire harness, thereby improving the reliability of the motor.

[0058] In some embodiments, the cooling assembly 102 further includes a water pump for providing power to the cooling assembly 102.

[0059] For example, referring to Figure 3B When the controller 103 controls the electromagnetic valve to open, the low-temperature coolant of the motor expansion tank flows into the cooling water path in the motor terminal box under the action of the water pump, and the low-temperature coolant is converted into high-temperature coolant after passing through the cooling water path. The high-temperature coolant flows from the motor terminal box to the heat dissipation pump.

[0060] In a possible implementation, the cooling assembly 102 further includes a one-way valve arranged on the pipeline between the motor terminal box and the heat dissipation pump, for preventing the high-temperature coolant from flowing back, For example, referring to Figure 3B Due to the presence of the one-way valve, when the controller 103 controls the valve to close, the low-temperature coolant of the motor expansion tank cannot flow into the cooling water path, and the high-temperature coolant flows out of the motor terminal box, and returns to the motor expansion tank through the heat dissipation pump.

[0061] Through the above motor terminal box detection system 100, when the temperature of the motor terminal box is too high, the valve in the cooling assembly 102 is opened, and the temperature at the terminal clamps is reduced by the coolant in the cooling water path, which reduces the possibility of burning, fire, smoke, insulation and other failures of the motor terminal box, thereby ensuring the safety of the vehicle.

[0062] In some embodiments, the controller 103 is further configured to output first warning information when the temperature of the motor terminal box is greater than or equal to a preset second temperature threshold.

[0063] The first warning information is used to indicate that the motor terminal box has a high-temperature fault.

[0064] In this embodiment, the second temperature threshold is greater than the first temperature threshold. For example, the second temperature threshold can be 90°C.

[0065] It can be understood that when the temperature of the motor terminal box is greater than or equal to the preset second temperature threshold, it indicates that the temperature of the motor terminal box continues to rise, and the temperature of the motor terminal box cannot be reduced by only the cooling assembly 102, and therefore, the first warning information needs to be output in time to remind the driver to perform maintenance.

[0066] In a possible implementation, the controller 103 is further configured to output the first warning information on an instrument panel of the vehicle. Optionally, the first warning information can be a fault code or a fault icon corresponding to the high-temperature fault.

[0067] In another possible implementation, the controller 103 is further configured to send the first warning information to a monitoring platform through a telematics box (T-BOX). The monitoring platform is located in a cloud server, and is configured to record the first warning information sent by the controller 103 and send prompt information to a terminal of the driver.

[0068] Through the motor terminal box detection system 100, in the case that the temperature of the motor terminal box is greater than or equal to the preset second temperature threshold, the alarm processing is performed, and the occurrence of the ablation, fire, smoke, insulation and other faults of the motor terminal box is avoided, thereby ensuring the safety of the vehicle.

[0069] In some embodiments, the controller 103 is further configured to reduce the power of the drive motor in the case that the temperature of the motor terminal box is greater than or equal to the preset second temperature threshold.

[0070] It can be understood that when the power of the drive motor is large, the connectors in the motor terminal box have large peak currents and voltages, which can cause the temperature of the terminal to rise. Therefore, in the case that the temperature of the motor terminal box is greater than or equal to the preset second temperature threshold, in order to avoid the occurrence of the ablation, fire, smoke, insulation and other faults of the motor terminal box, the controller 103 is further configured to reduce the power of the drive motor.

[0071] For example, in the case that the temperature of the motor terminal box is greater than or equal to 90°C, the vehicle controller 103 is further configured to send a signal for reducing the power to the drive motor controller 103.

[0072] Through the motor terminal box detection system 100, in the case that the temperature of the motor terminal box is greater than or equal to the preset second temperature threshold, the power of the drive motor is actively reduced, the possibility of vehicle fire is reduced, and the safety of the vehicle is ensured.

[0073] In some embodiments, the motor terminal box further comprises a humidity sensor configured to detect the humidity inside the motor terminal box, the humidity sensor is arranged inside the housing of the motor terminal box, and the controller 103 is connected with the humidity sensor, and the controller 103 is further configured to output the second warning information when the humidity inside the motor terminal box is greater than or equal to a preset humidity threshold.

[0074] The second warning information is used to indicate that the motor terminal box has a sealing failure.

[0075] In the embodiment, the humidity inside the motor terminal box can be relative humidity, for example, the humidity threshold can be 60%.

[0076] In actual application, the humidity threshold can be calibrated by technicians through a large number of experiments.

[0077] For example, referring to Figure 3A , the humidity sensor can be attached to the edge of the inside of the terminal box, or the humidity sensor can be arranged in the sealed cavity between the motor terminal box and the upper cover of the motor terminal box.

[0078] It should be noted that the insulation performance is an important indicator of the reliability of the driving motor, and once the insulation value is lower than the specified value, the system will be alarmed, which will cause power limitation or interruption, or even cause insulation failure, local ablation or motor burnout, etc. Condensation is one of the important reasons for insulation failure. The root cause of condensation is that there is a certain humidity in the air. When the motor is running, the water vapor in the internal air will diffuse to the surrounding after being heated. The temperature of the motor terminal box cover plate, the inner wall of the motor shell, and the cover plate of the rotary transformer is relatively low because it is directly in contact with the external environment. When the water vapor with high temperature meets the surface of the objects with low temperature such as the motor terminal box cover plate, the inner wall of the motor shell, and the cover plate of the rotary transformer, the water vapor will condense due to the decrease in temperature. Generally, slight condensation does not pose a great risk to the motor, but if it is not controlled, it is very dangerous, especially when the condensation on the terminal box cover plate accumulates to a certain amount, it may fall to the high-voltage live parts such as the wire harness, the copper busbar, and the terminal bolt inside the motor terminal box due to gravity, vibration, etc. This will cause insulation failure and affect the safety of the motor and the whole vehicle. Therefore, when the humidity of the motor terminal box is greater than the preset humidity threshold, it proves that the waterproof of the motor terminal box has failed, there is a sealing failure, and it needs to be repaired in time to avoid accidents such as insulation failure, local ablation or motor burnout, etc.

[0079] In a possible implementation, the humidity sensor can be a humidity-sensitive resistance sensor, the humidity sensor is configured to feed back the current resistance value to the controller 103 through the CAN bus; the controller 103 is configured to calculate the humidity in the motor terminal box according to the received current resistance value, and output the second warning information in a case where the humidity in the motor terminal box is greater than or equal to the preset humidity threshold.

[0080] In a possible implementation, the controller 103 is further configured to output the second early warning information on the instrument panel of the vehicle, and the second early warning information can be a fault code or a fault icon corresponding to the sealing failure.

[0081] In another possible implementation, the controller 103 is further configured to send the second early warning information to a monitoring platform through the T-BOX, the monitoring platform is located in a cloud server, and is configured to record the second early warning information sent by the controller 103 and send prompt information to the terminal of the driver.

[0082] By using the motor terminal box detection system 100, the humidity in the motor terminal box is detected by the humidity sensor, the internal humidity state of the motor is learned in time, and the condensation condition is known. When the humidity in the motor terminal box is greater than the preset humidity threshold, it indicates that the condensation is serious, and the alarm information is output at this time to remind the driver to timely repair, so that the safety of the driving motor is improved, and the safety of the vehicle is further ensured.

[0083] Figure 4 FIG. 1 is a flowchart of a motor terminal box detection method according to an example embodiment. As shown in FIG. 1, the motor terminal box detection method is applied to the motor terminal box detection system in Figure 4 FIG. 1, and the method includes the following steps. Figure 1

[0084] In step S401, the temperature of the motor terminal box detected by the temperature sensor is acquired.

[0085] In some embodiments, the temperature sensor can be a thermal resistance temperature sensor.

[0086] In some embodiments, the motor terminal box further has a plurality of terminal posts, and the temperature sensor is arranged on the plurality of terminal posts; and the temperature sensor is configured to detect the temperature of the terminal post or the coil temperature in the motor terminal box.

[0087] In step S402, the temperature of the motor terminal box is greater than or equal to the preset first temperature threshold, and the cooling water path is controlled to reduce the temperature of the motor terminal box.

[0088] In some embodiments, the first temperature threshold can be 60°C.

[0089] ​In some embodiments, the cooling assembly further comprises a valve, and the controller is connected with the valve; the cooling water circuit is connected with the motor expansion tank and the heat pump of the vehicle through the valve, and the cooling water circuit is arranged around the plurality of terminal blocks arranged inside the motor terminal box.

[0090] In some embodiments, the controller is a vehicle controller.

[0091] By using the above method, not only the temperature of the motor terminal box can be detected, but also the cooling assembly can be used for active cooling when the temperature is greater than or equal to the preset first temperature threshold, thereby reducing the occurrence of ablation, fire, smoke, insulation and other faults of the motor terminal box, and further ensuring the safety of the vehicle.

[0092] In some embodiments, the above motor terminal box detection method further comprises: controlling the opening or closing of the valve, and the valve is used to control the flow of the cooling liquid in the cooling water circuit.

[0093] In this embodiment, the valve can be an electromagnetic valve.

[0094] In this embodiment, the cooling liquid is the original engine cooling liquid of the vehicle, which can protect the engine to run normally and well, circulate in the engine water tank, and have the effects of anti-freezing, anti-boiling, anti-rust, anti-corrosion and the like.

[0095] In some embodiments, the shape of the cooling water circuit comprises a U shape; in other embodiments, the cooling water circuit is S-shaped or other shapes.

[0096] By using the above method, when the temperature of the motor terminal box is too high, the valve in the cooling assembly is opened, and the temperature at the terminal block is reduced by the cooling liquid in the cooling water circuit, thereby reducing the possibility of ablation, fire, smoke, insulation and other faults of the motor terminal box, and further ensuring the safety of the vehicle.

[0097] In some embodiments, the above motor terminal box detection method further comprises: outputting a first warning information when the temperature of the motor terminal box is greater than or equal to a preset second temperature threshold.

[0098] The first warning information is used to indicate that the motor terminal box has a high temperature fault.

[0099] In this embodiment, the second temperature threshold is greater than the first temperature threshold. For example, the second temperature threshold can be 90°C.

[0100] In a possible implementation, outputting the first warning information can include the following ways.

[0101] The first warning information can be a fault code or a fault icon corresponding to the high-temperature fault.

[0102] The second method is to send the first warning information to a monitoring platform through a T-BOX. The monitoring platform is located in a cloud server and is configured to record the first warning information sent by the controller and send prompt information to a terminal of the driver.

[0103] In the above method, in the case that the temperature of the motor terminal box is greater than or equal to the preset second temperature threshold, an alarm is processed, thereby avoiding the occurrence of faults such as ablation, fire, smoke, and insulation of the motor terminal box, and further ensuring the safety of the vehicle.

[0104] In some embodiments, the above motor terminal box detection method further includes: In the case that the temperature of the motor terminal box is greater than or equal to the preset second temperature threshold, the power of the driving motor is reduced.

[0105] For example, in the case that the temperature of the motor terminal box is greater than or equal to the preset second temperature threshold, the power of the driving motor is reduced: in the case that the temperature of the motor terminal box is greater than or equal to 90℃, a signal for reducing the power is sent to the driving motor controller.

[0106] In the above method, in the case that the temperature of the motor terminal box is greater than or equal to the preset second temperature threshold, the power of the driving motor is actively reduced, the possibility of vehicle fire is reduced, and the safety of the vehicle is ensured.

[0107] In some embodiments, the motor terminal box further includes a humidity sensor configured to detect the humidity in the motor terminal box. The humidity sensor is arranged inside the shell of the motor terminal box, and the controller is connected with the humidity sensor. The above motor terminal box detection method further includes: In the case that the humidity of the motor terminal box is greater than or equal to a preset humidity threshold, a second warning information is output.

[0108] The second warning information is configured to indicate that the motor terminal box has a sealing failure.

[0109] In this embodiment, the humidity in the motor terminal box can be relative humidity. For example, the humidity threshold can be 60%.

[0110] In actual application, the humidity threshold can be calibrated by technicians through a large number of experiments.

[0111] In a possible implementation, the humidity sensor can be a humidity-sensitive resistance sensor.

[0112] In a possible implementation, the outputting the second early warning information can include the following manners.

[0113] Manner one, outputting the second early warning information on the instrument panel of the vehicle, and optionally, the second early warning information can be a fault code or a fault icon corresponding to the sealing failure.

[0114] Manner two, sending the second early warning information to a monitoring platform through a T-BOX, the monitoring platform being located in a cloud server, and being configured to record the second early warning information sent by the controller and send prompt information to a terminal of the driver.

[0115] By the above method, the humidity in the motor terminal box is detected by the humidity sensor, and the internal humidity state of the motor is learned in time to produce condensation condition. When the humidity in the motor terminal box is greater than the preset humidity threshold, it indicates that the condensation is serious. At this time, the alarm information is output to remind the driver to repair in time, which can improve the safety of the driving motor and further ensure the safety of the vehicle.

[0116] Figure 5 is a block diagram of an electronic device 500 according to an example embodiment. For example, the electronic device 500 can be provided as a server. Referring to Figure 5 , the electronic device 500 includes a processor 522, the number of which can be one or more, and a memory 532 for storing a computer program executable by the processor 522. The computer program stored in the memory 532 can include one or more modules each corresponding to a set of instructions. In addition, the processor 522 can be configured to execute the computer program to perform the motor terminal box detection method described above. Figure 4

[0117] In addition, the electronic device 500 can further include a power supply component 526 which can be configured to perform power management of the electronic device 500, and a communication component 550 which can be configured to implement communication of the electronic device 500, for example, wired or wireless communication. In addition, the electronic device 500 can further include an input / output (I / O) interface 558. The electronic device 500 can operate based on an operating system stored in the memory 532.

[0118] Figure 6 is a block diagram of a vehicle 600 according to an example embodiment. The vehicle includes the motor terminal box detection system as described above. Figure 1 For example, the vehicle 600 can be a hybrid vehicle, and can also be a non-hybrid vehicle, an electric vehicle, a fuel cell vehicle, or other types of vehicles. The vehicle 600 can be an autonomous vehicle, a semi-autonomous vehicle, or a non-autonomous vehicle.

[0119] Referring to​Figure 6 The vehicle 600 can include various subsystems, such as an infotainment system 610, a perception system 620, a decision control system 630, a drive system 640, and a computing platform 650. The vehicle 600 can include more or fewer subsystems, and each subsystem can include multiple components. In addition, each subsystem and each component of the vehicle 600 can be interconnected by wired or wireless means.

[0120] In some embodiments, the infotainment system 610 can include a communication system, an entertainment system, a navigation system, and the like.

[0121] The perception system 620 can include several sensors for sensing information of the environment surrounding the vehicle 600. For example, the perception system 620 can include a global positioning system (which can be a GPS system, a Beidou system, or other positioning system), an inertial measurement unit (IMU), a lidar, a millimeter wave radar, an ultrasonic radar, and a camera.

[0122] The decision control system 630 can include a computing system, a vehicle controller, a steering system, a throttle, and a braking system.

[0123] The drive system 640 can include components that provide motive power for the vehicle 600. In one embodiment, the drive system 640 can include an engine, an energy source, a transmission system, and wheels. The engine can be one or a combination of an internal combustion engine, an electric motor, an air compression engine, or the like. The engine can convert energy provided by the energy source into mechanical energy.

[0124] Some or all functions of the vehicle 600 are controlled by the computing platform 650. The computing platform 650 can include at least one processor 651 and a memory 652, and the processor 651 can execute instructions 653 stored in the memory 652.

[0125] The processor 651 can be any conventional processor, such as commercially available CPUs. The processor can also include a graphics processing unit (GPU), a field programmable gate array (FPGA), a system on chip (SOC), an application specific integrated circuit (ASIC), or a combination thereof.

[0126] Memory 652 can be implemented by any type of volatile or nonvolatile storage devices or a combination thereof such as static random access memory (SRAM), electrically erasable programmable read only memory (EEPROM), erasable programmable read only memory (EPROM), programmable read only memory (PROM), read only memory (ROM), magnetic storage, flash memory, magnetic or optical disk.

[0127] In addition to instructions 653, memory 652 can store data such as road maps, route information, vehicle position, direction, speed, and the like. The data stored in memory 652 can be used by computing platform 650.

[0128] In the embodiments of the present disclosure, processor 651 can execute instructions 653 to complete all or part of the steps of the motor terminal box detection method described above.

[0129] The present disclosure also provides a computer readable storage medium having stored thereon computer program instructions, which, when executed by a processor, implement the steps of the motor terminal box detection method provided by the present disclosure.

[0130] In another exemplary embodiment, a computer program product is also provided, which includes a computer program capable of being executed by a programmable device, and the computer program has code portions for executing the motor terminal box detection method described above when executed by the programmable device.

[0131] The preferred embodiments of the present disclosure are described in detail above with reference to the accompanying drawings, but the present disclosure is not limited to the specific details in the above-described embodiments. Within the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

[0132] In addition, it should be noted that each specific technical feature described in the above specific embodiments can be combined in any appropriate manner without contradiction, and in order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0133] In addition, any combination of various different embodiments of the present disclosure can also be made, as long as it does not deviate from the idea of the present disclosure, it should also be considered as disclosed by the present disclosure.

Claims

1. An electric motor junction box detection system, characterized by, The detection system is applied to a vehicle, and comprises a temperature sensor, a cooling assembly and a controller, the controller is connected with the cooling assembly and the temperature sensor respectively, the cooling assembly comprises a cooling water circuit, the cooling water circuit is connected with a motor expansion tank and a heat dissipation pump of the vehicle, and the cooling water circuit surrounds a plurality of terminal blocks arranged inside the motor terminal box; The temperature sensor is used for detecting the temperature in the motor terminal box; The controller is used for controlling the cooling water circuit to reduce the temperature of the motor terminal box when the temperature in the motor terminal box is greater than or equal to a preset first temperature threshold.

2. The motor junction box detection system of claim 1, wherein, The temperature sensor is arranged on the plurality of terminal blocks.

3. The motor junction box detection system of claim 1, wherein, The cooling assembly further comprises a valve, the controller is connected with the valve, and the cooling water circuit is connected with the motor expansion tank and the heat dissipation pump through the valve; The valve is used for controlling the flow of the cooling liquid in the cooling water circuit; The controller is further used for controlling the opening or closing of the valve.

4. The motor junction box detection system of claim 1, wherein, The shape of the cooling water circuit comprises a U shape.

5. The motor junction box detection system of claim 1, wherein, The controller is further used for outputting first warning information when the temperature of the motor terminal box is greater than or equal to a preset second temperature threshold, the first warning information is used for indicating that the motor terminal box has a high-temperature fault, and the second temperature threshold is greater than the first temperature threshold.

6. The motor junction box detection system of claim 5, wherein, The controller is further used for reducing the power of the driving motor when the temperature of the motor terminal box is greater than or equal to the preset second temperature threshold.

7. The motor junction box detection system of claim 1, wherein The motor terminal box further comprises a humidity sensor used for detecting the humidity in the motor terminal box, the humidity sensor is arranged on the inner side of the shell of the motor terminal box, the controller is connected with the humidity sensor, and the controller is further used for outputting second warning information when the humidity of the motor terminal box is greater than or equal to a preset humidity threshold, the second warning information is used for indicating that the motor terminal box has a sealing fault.

8. The motor junction box detection system of any one of claims 1 to 7, wherein, The controller is a vehicle controller.

9. A method of detecting a motor terminal box, characterized by, The detection system is applied to a motor terminal box, and comprises a temperature sensor, a cooling assembly and a controller, the controller is connected with the cooling assembly and the temperature sensor respectively, the cooling assembly comprises a cooling water circuit, the cooling water circuit is connected with a motor expansion tank and a heat dissipation pump of the vehicle, and the cooling water circuit surrounds a plurality of terminal blocks arranged inside the motor terminal box; the method comprises: Obtaining the temperature of the motor terminal box detected by the temperature sensor; When the temperature of the motor terminal box is greater than or equal to a preset first temperature threshold, the cooling water circuit is controlled to reduce the temperature of the motor terminal box.

10. A vehicle characterized by comprising: The motor terminal box detection system comprises the motor terminal box detection system according to any one of claims 1 to 7.

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