Electric engineering machinery heat balance test device and method

Abstract

The invention discloses a heat balance test device and method for electric engineering machinery. The device comprises a plurality of temperature sensors which are distributed at a plurality of positions on a frame of the electric engineering machinery and are respectively used for detecting the environment temperature and the temperature of a to-be-detected part of a radiator; the temperature sensor is a temperature sensor carried by a wire harness on a frame; the complete machine controller is electrically connected with the temperature sensor, and the complete machine controller receives the analog signal sent by the temperature sensor and sends the analog signal to the complete machine bus; the data acquisition analyzer is in communication connection with the complete machine controller; the data acquisition analyzer receives the analog signal on the complete machine bus and analyzes the analog signal in real time; the display terminal is in communication connection with the data acquisition analyzer; and the display terminal receives the analyzed temperature data and displays the analyzed temperature data by logging in a webpage. According to the invention, the operation safety can be improved while the manpower, material resources and time cost of testing are saved.

Description

Technical Field

[0001] This invention relates to the field of engineering machinery technology, and in particular to a thermal balance test device and method for electric engineering machinery. Background Technology

[0002] Construction machinery, such as loaders, is a type of self-propelled wheeled chassis construction machinery that loads, shovels, and transports bulk materials over short distances. It features high operating speed, high efficiency, good mobility, and easy operation, and is widely used in earthwork construction and bulk material handling operations in highways, railways, buildings, hydropower, ports, and mines.

[0003] With the development of new energy technologies, the application of electric construction machinery is becoming increasingly widespread. In practical applications, comprehensive thermal balance testing of electric construction machinery is necessary. Taking a pure electric loader as an example, the comprehensive thermal balance test method for pure electric loaders adopts the direct contact measurement method. Specifically, a T-type thermocouple temperature sensor is brought into contact with the medium being tested to collect the temperature. For example, the temperature measurement points required for comprehensive thermal balance testing include: ambient temperature, motor radiator inlet temperature, hydraulic oil radiator inlet temperature, power battery thermal management system radiator inlet temperature, and transmission oil temperature. Installing the temperature measurement points requires disconnecting the pipes connected to the radiator and inserting the thermocouple temperature sensor into the pipes to contact the coolant and oil, consuming significant manpower, resources, and time. After the temperature test, the CSM temperature module receives the data from the T-type thermocouple temperature sensor and sends it to the eDAQ-lite data acquisition unit. The eDAQ-lite data acquisition unit is then connected to a laptop via a network cable, and the data is downloaded to the laptop. Finally, the data is processed and analyzed using third-party software InField. Overall, the thermal balance test is costly. Summary of the Invention

[0004] This invention provides a thermal balance testing device and method for electric engineering machinery, which improves operational safety while saving manpower, material resources and time costs in testing.

[0005] According to one aspect of the present invention, a thermal balance testing device for electric engineering machinery is provided, comprising:

[0006] Multiple temperature sensors are distributed at various locations on the frame of the electric engineering machinery, and are used to detect the ambient temperature and the temperature of the part of the radiator to be tested, respectively; the temperature sensors are temperature sensors integrated into the wiring harness on the frame.

[0007] The overall controller is electrically connected to the temperature sensor. The overall controller receives the analog signal sent by the temperature sensor and sends the analog signal to the overall bus.

[0008] A data acquisition and parsing unit is communicatively connected to the overall controller; the data acquisition and parsing unit receives the analog signals on the overall bus and performs real-time parsing of the analog signals;

[0009] The display terminal is communicatively connected to the data acquisition and parsing unit; the display terminal receives the parsed temperature data and displays it through a webpage.

[0010] Optionally, the data acquisition and parsing unit includes a data receiving module, a data parsing module, and a data sending module;

[0011] The data receiving module is a wired communication module and / or a wireless communication module, and it is connected to the whole machine controller via CAN communication.

[0012] The data parsing module performs real-time parsing of the received analog signal according to the DBC protocol;

[0013] The data transmission module is a wired communication module and / or a wireless communication module, which communicates with the display terminal through a local area network.

[0014] Optionally, the data receiving module includes a communication interface, which is connected to the OBD communication interface of the whole machine controller.

[0015] Optionally, the data transmission module is a WIFI module, which communicates with the display terminal through a local WIFI network.

[0016] Optionally, the plurality of temperature sensors include at least an ambient temperature sensor, a gearbox oil temperature sensor, a battery cooling inlet temperature sensor, a hydraulic oil temperature sensor, and a motor cooling inlet temperature sensor.

[0017] Optionally, the plurality of temperature sensors may also include a battery cooling outlet temperature sensor and a motor cooling outlet temperature sensor.

[0018] Optionally, the temperature sensor may be positioned at at least one of the following locations:

[0019] The ambient temperature sensor is located on the vehicle frame at a position corresponding to the area below the driver's cab.

[0020] The transmission oil temperature sensor is inserted into the transmission.

[0021] The battery cooling outlet temperature sensor is inserted into the battery cooling water outlet pipe;

[0022] The battery cooling inlet temperature sensor is inserted into the battery cooling water inlet pipe;

[0023] The hydraulic oil temperature sensor is inserted into the inlet pipe of the hydraulic oil radiator;

[0024] The motor cooling inlet temperature sensor is inserted into the cooling water inlet pipe of the motor thermal management cooling radiator.

[0025] The motor cooling outlet temperature sensor is inserted into the cooling water outlet pipe of the motor thermal management cooling radiator.

[0026] Optionally, the radiator is mounted on the frame of the electric construction machinery;

[0027] The radiator integrates a hydraulic oil radiator, a transmission oil radiator, and a motor and battery thermal management coolant radiator.

[0028] According to another aspect of the present invention, a method for thermal balance testing of electric engineering machinery is provided, employing the thermal balance testing device for electric engineering machinery as described in any embodiment of the present invention; the method includes:

[0029] The electric construction machinery is started and controlled to perform different working conditions; during the operation, the temperature sensor sends an analog signal representing the temperature to the whole machine controller;

[0030] The data acquisition and parser is communicatively connected to the overall controller to receive the analog signals on the overall bus and perform real-time parsing of the analog signals;

[0031] The display terminal is communicatively connected to the data acquisition and parsing unit to receive the parsed temperature data and display it through a webpage.

[0032] Optionally, the method for the data acquisition and parsing unit to perform real-time parsing of the analog signal specifically includes:

[0033] According to the DBC protocol, the analog signal is parsed to obtain at least one of the following: ambient temperature data, motor radiator inlet temperature data, hydraulic oil radiator inlet temperature data, power battery thermal management system radiator inlet temperature data, and transmission oil temperature data.

[0034] The embodiments of the present invention can achieve at least the following beneficial effects:

[0035] Firstly, the embodiments of the present invention do not require the removal of pipes connected to the radiator, thereby avoiding the time-consuming and labor-intensive work required for disassembly and assembly, and preventing liquid leakage, environmental pollution and electric shock risks caused by disassembly and assembly.

[0036] Secondly, in this embodiment of the invention, the vehicle controller and the distributed temperature sensors are used. Only the data acquisition and parser needs to be connected to the vehicle controller. The acquisition link is simple, which greatly reduces the installation and debugging time and effectively improves the testing efficiency.

[0037] Thirdly, the data acquisition and parsing unit automatically analyzes the temperature data in real time and displays the temperature rise curve changes during the thermal equilibrium test on the display terminal, which makes it easier for test engineers to intuitively judge the time to reach thermal equilibrium, end the test in time, and avoid over-testing and wasting resources.

[0038] Fourthly, the data acquisition and parsing unit integrates a parsing algorithm to analyze temperature data in real time, reducing the complex post-processing work of test engineers.

[0039] In summary, the embodiments of the present invention eliminate the need to disassemble the radiator connection piping and install T-type thermocouple sensors. Temperature data is read by communicating with the overall controller using a data acquisition and analysis unit. The instrument installation and debugging are simple, and data analysis is rapid, significantly reducing the monetary, time, and labor costs of thermal balance testing. Therefore, the embodiments of the present invention can achieve rapid verification and analysis of the overall thermal balance performance of electric construction machinery under different operating conditions, shortening the overall machine development cycle.

[0040] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0042] Figure 1 This is a schematic diagram of the structure of a thermal balance test device for electric engineering machinery provided in an embodiment of the present invention;

[0043] Figure 2 This is a schematic diagram of the structure of a data acquisition and parser provided in an embodiment of the present invention;

[0044] Figure 3 This is a schematic diagram of the structure of a heat sink provided in an embodiment of the present invention;

[0045] Figure 4 This is a schematic diagram of the frame structure of an electric engineering machinery provided in an embodiment of the present invention;

[0046] Figure 5 This is a flowchart illustrating a thermal balance test method for electric engineering machinery provided in an embodiment of the present invention. Detailed Implementation

[0047] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0048] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0049] This invention provides a thermal balance test device for electric construction machinery, such as a pure electric loader. Figure 1 This is a schematic diagram of a thermal balance testing device for electric engineering machinery provided in an embodiment of the present invention. See also... Figure 1 The electric engineering machinery thermal balance test device includes:

[0050] Multiple temperature sensors 100 are distributed at multiple locations on the frame of the electric engineering machinery, and are used to detect the ambient temperature and the temperature of the part of the radiator to be tested; the multiple temperature sensors 100 are temperature sensors integrated into the wiring harness on the frame.

[0051] The whole machine controller 200 is electrically connected to the temperature sensor 100. The whole machine controller 200 receives the analog signal sent by the temperature sensor 100 and sends the analog signal to the whole machine bus.

[0052] The data acquisition and parsing unit 300 is communicatively connected to the overall controller 200; the data acquisition and parsing unit 300 receives analog signals from the overall bus and performs real-time parsing of the analog signals.

[0053] The display terminal 400 is communicatively connected to the data acquisition and parsing unit 300; the display terminal 400 receives the parsed temperature data and displays it through a webpage.

[0054] The temperature sensors integrated into the wiring harness on the vehicle frame are either fixedly mounted on the frame or inserted into various components within the electric construction machinery. They require no disassembly during measurement and can accurately measure the temperature of each component. The overall controller 200 serves as the vehicle control center for the construction machinery, coordinating commands to all subsystems, including the electric drive, battery, engine, hydraulics, thermal management, and accessories, based on the driver's or cloud-based operational intentions, and monitoring the overall machine status in real time. For the electric construction machinery itself, the multiple temperature sensors 100 and the overall controller 200 are inherent and built-in. This embodiment of the invention is equivalent to using the temperature sensors 100 integrated into the electric construction machinery for thermal balance testing.

[0055] The data acquisition and parsing unit 300 is an independently developed instrument. It can communicate with both the overall controller 200 and the display terminal 400. As the core component of the thermal balance test device, it integrates a data parsing algorithm, enabling real-time parsing of temperature data in analog signal form. The display terminal 400 receives the parsed temperature data and displays it via a webpage. The display terminal can be, for example, a laptop, tablet, desktop computer, or mobile phone.

[0056] For example, the method for conducting thermal balance testing using an electric construction machinery thermal balance testing device is as follows: The electric construction machinery is started and controlled to perform different operating conditions; during operation, the temperature sensor 100 sends an analog signal characterizing the temperature to the machine controller 200; the data acquisition and parsing unit 300 is communicatively connected to the machine controller 200 to receive the analog signals on the machine bus and perform real-time parsing of the analog signals; the display terminal 400 is communicatively connected to the data acquisition and parsing unit 300 to receive the parsed temperature data and display it through a webpage.

[0057] The embodiments of the present invention can achieve at least the following beneficial effects:

[0058] Firstly, the embodiments of the present invention do not require the removal of pipes connected to the radiator, thereby avoiding the time-consuming and labor-intensive work required for disassembly and assembly, and preventing liquid leakage, environmental pollution and electric shock risks caused by disassembly and assembly.

[0059] Secondly, in this embodiment of the invention, the vehicle controller 200 and the distributed temperature sensors 100 are used. Only the data acquisition and parser needs to be connected to the vehicle controller. The acquisition link is simple, which greatly reduces the installation and debugging time and effectively improves the testing efficiency.

[0060] Thirdly, the data acquisition and parsing unit 300 automatically parses the temperature data in real time and displays the temperature rise curve changes during the thermal equilibrium test process through the display terminal 400. This allows test engineers to intuitively judge when thermal equilibrium is reached, end the test in a timely manner, and avoid over-testing and wasting resources.

[0061] Fourthly, the data acquisition and parsing unit 300 integrates a parsing algorithm to analyze temperature data in real time, reducing the complex post-processing work of test engineers.

[0062] In summary, the embodiments of the present invention eliminate the need to disassemble the pipes connected to the radiator and install T-type thermocouple sensors. Temperature data is read by communicating with the overall controller 200 using the data acquisition and analysis unit 300. The instrument installation and debugging are simple, and data analysis is rapid, significantly reducing the monetary, time, and labor costs of thermal balance testing. Therefore, the embodiments of the present invention can achieve rapid verification and analysis of the overall thermal balance performance of electric construction machinery under different operating conditions, shortening the development cycle of the entire machine.

[0063] Figure 2 This is a schematic diagram of a data acquisition and parser provided in an embodiment of the present invention. See also... Figure 2 Based on the above embodiments, optionally, the data acquisition and parsing unit 300 includes a data receiving module 310, a data parsing module 320, and a data sending module 330; wherein, the data receiving module 310 is a wired communication module and / or a wireless communication module, and is connected to the whole machine controller 200 via CAN communication; the data parsing module 320 performs real-time parsing of the received analog signals according to the DBC protocol; the data sending module 330 is a wired communication module and / or a wireless communication module, and is connected to the display terminal 400 via a local area network.

[0064] The overall controller 200 uses CAN communication to receive temperature data sent by each temperature sensor 100, and the data receiving module 310 connects to the overall controller 200 via CAN communication, which helps simplify communication costs. The DBC protocol, short for Database for CAN, has a simple file format and is easy to implement.

[0065] In one embodiment, the data receiving module 310 optionally includes a communication interface connected to the OBD communication interface of the overall controller 200. The data acquisition and parsing unit 300 is connected to the overall controller 200 through this communication interface to read analog signals from the CAN bus of the overall controller 200.

[0066] In one embodiment, the data transmission module 330 is optionally a WIFI module, which communicates with the display terminal 400 via a local WIFI network. This configuration enables the display terminal 400 to communicate remotely with the data acquisition and parser 300 via a wireless network, allowing test engineers to monitor test data remotely from the work site, ensuring personnel safety and reducing the risk of collisions.

[0067] Based on the above embodiments, optionally, the radiator is mounted on the frame of the electric construction machinery. Figure 3 This is a schematic diagram of a heat sink provided in an embodiment of the present invention. See also... Figure 3 The radiator integrates a hydraulic oil radiator 510, a transmission oil radiator 520, and a motor and battery thermal management coolant radiator 530. The hydraulic oil radiator 510 includes an inlet pipe 511 and an outlet pipe 512; the transmission oil radiator 520 includes an inlet pipe 521 and an outlet pipe 522; and the motor and battery thermal management coolant radiator 530 includes an inlet pipe 531 and an outlet pipe 532. Multiple temperature measurement points can be selected from the inlet pipe 511, outlet pipe 512, inlet pipe 521, outlet pipe 522, inlet pipe 531, and outlet pipe 532.

[0068] In some embodiments, optionally, performing a thermal equilibrium test only requires arranging temperature measuring points 501 in the ambient temperature, inlet pipe 511, inlet pipe 521, and inlet pipe 531. Accordingly, the plurality of temperature sensors 100 includes at least an ambient temperature sensor, a gearbox oil temperature sensor, a battery cooling inlet temperature sensor, a hydraulic oil temperature sensor, and a motor cooling inlet temperature sensor.

[0069] In other embodiments, alternatively, based on the fact that the electric engineering machinery also has other temperature sensors built in, the battery cooling outlet temperature sensor and the motor cooling outlet temperature sensor can also be used to perform thermal balance testing.

[0070] Figure 4 This is a schematic diagram of the frame structure of an electric engineering machine provided in an embodiment of the present invention. See also... Figure 4 Area A of the chassis corresponds to the position of the cab, and the gearbox is located in area A; the battery pack and radiator are located in area B of the chassis.

[0071] See also Figure 4 Based on the above embodiments, optionally, the temperature sensor can be positioned at at least one of the following locations:

[0072] The ambient temperature sensor 110 is installed on the vehicle frame at a position corresponding to the area below the cab; the ambient temperature sensor 110 should be kept away from heat dissipation components as much as possible;

[0073] The transmission fluid temperature sensor 120 is inserted into the transmission; the transmission fluid temperature sensor 120 detects the fluid temperature inside the transmission to indicate the temperature of the inlet pipe of the transmission fluid cooler.

[0074] A battery cooling outlet temperature sensor 130 is inserted into the battery cooling water outlet pipe; wherein, the temperature of the battery cooling water outlet pipe detected by the battery cooling outlet temperature sensor 130 is used to refer to the temperature of the inlet pipe of the motor and the battery thermal management coolant radiator.

[0075] A battery cooling inlet temperature sensor 140 is inserted into the battery cooling water inlet pipe; the temperature of the battery cooling water inlet pipe detected by the battery cooling inlet temperature sensor 140 is used to indicate the temperature of the outlet pipe of the motor and battery thermal management coolant radiator.

[0076] The hydraulic oil temperature sensor 150 is inserted into the inlet pipe of the hydraulic oil cooler.

[0077] The motor cooling inlet temperature sensor 160 is inserted into the cooling water inlet pipe of the motor thermal management cooling radiator.

[0078] The motor cooling outlet temperature sensor 170 is inserted into the cooling water outlet pipe of the motor thermal management cooling radiator.

[0079] The radiator integrates a hydraulic oil radiator, a transmission oil radiator, and a motor and battery thermal management coolant radiator.

[0080] The present invention is configured in such a way that the temperature sensor built into the wiring harness in the electric engineering machinery can be fully utilized, eliminating the need to disassemble and reassemble the pipeline during thermal balance testing.

[0081] This invention also provides a method for thermal balance testing of electric engineering machinery. This method employs the thermal balance testing device for electric engineering machinery as provided in any embodiment of this invention. Specifically, Figure 5 This is a schematic flowchart illustrating a thermal balance test method for electric engineering machinery provided in an embodiment of the present invention. See also... Figure 5 The method includes:

[0082] S110. Start the electric construction machinery and control the electric construction machinery to perform different working conditions; during the operation, the temperature sensor 100 sends an analog signal representing the temperature to the whole machine controller 200.

[0083] S120. Connect the data acquisition and parser 300 to the whole machine controller 200 for communication, receive analog signals on the whole machine bus, and perform real-time parsing of the analog signals;

[0084] S130. Connect the display terminal 400 to the data acquisition and parsing unit 300 to receive the parsed temperature data and display it through a webpage.

[0085] Therefore, this embodiment of the invention eliminates the need to disassemble the radiator's connecting pipes and install T-type thermocouple sensors. It utilizes the data acquisition and analysis unit 300 to communicate with the overall controller 200 to read temperature data. The instrument installation and debugging are simple, and data analysis is rapid, significantly reducing the monetary, time, and labor costs of thermal balance testing. Thus, this embodiment of the invention enables rapid verification and analysis of the overall thermal balance performance of electric construction machinery under different operating conditions, shortening the overall machine development cycle.

[0086] Based on the above embodiments, optionally, in S120, the method for the data acquisition and parsing unit 300 to perform real-time parsing of the analog signal specifically includes: parsing the analog signal according to the DBC protocol to obtain at least one of the following: ambient temperature data, motor radiator inlet temperature data, hydraulic oil radiator inlet temperature data, power battery thermal management system radiator inlet temperature data, and transmission oil temperature data. Here, DBC protocol is an abbreviation for Data Base for CAN, and its file format is simple and easy to implement.

[0087] In summary, this embodiment of the invention forwards the temperature signals detected by each temperature sensor 100 to the vehicle bus via the overall controller 200, and connects the data acquisition and parsing unit 300 to the vehicle's OBD communication interface to read the temperature data on the overall bus. Through real-time parsing according to the DBC protocol, temperature data at various measurement points, such as ambient temperature, motor radiator inlet temperature, hydraulic oil radiator inlet temperature, power battery thermal management system radiator inlet temperature, transmission oil temperature, and power battery cell temperature, can be obtained. Furthermore, other sensor signals from the vehicle can be collected according to experimental requirements, demonstrating strong scalability.

[0088] The data acquisition and parsing unit 300 integrates a CAN data parsing algorithm to process the acquired temperature signal data in real time. The data acquisition and parsing unit 300 forms a local WIFI network with a laptop or other display terminal. By logging into the web page on the laptop or other display terminal, the temperature rise curves of each measuring point during the test can be displayed in real time to show the results of the thermal balance test.

[0089] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0090] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A thermal balance testing device for electric engineering machinery, characterized in that, include: Multiple temperature sensors are distributed at multiple locations on the frame of the electric engineering machinery, and are used to detect the ambient temperature and the temperature of the part of the radiator to be tested, respectively. The temperature sensor is a temperature sensor integrated into the wiring harness on the vehicle frame. The overall controller is electrically connected to the temperature sensor. The overall controller receives the analog signal sent by the temperature sensor and sends the analog signal to the overall bus. The data acquisition and parsing unit is communicatively connected to the overall controller. The data acquisition and parsing unit receives the analog signals on the whole machine bus and performs real-time parsing of the analog signals; The display terminal is communicatively connected to the data acquisition and parsing unit; the display terminal receives the parsed temperature data and displays it through a webpage.

2. The electric engineering machinery thermal balance test device according to claim 1, characterized in that, The data acquisition and parsing unit includes a data receiving module, a data parsing module, and a data sending module; The data receiving module is a wired communication module and / or a wireless communication module, and it is connected to the whole machine controller via CAN communication. The data parsing module performs real-time parsing of the received analog signal according to the DBC protocol; The data transmission module is a wired communication module and / or a wireless communication module, which communicates with the display terminal through a local area network.

3. The electric engineering machinery thermal balance test device according to claim 2, characterized in that, The data receiving module includes a communication interface, which is connected to the OBD communication interface of the whole machine controller.

4. The electric engineering machinery thermal balance test device according to claim 2, characterized in that, The data transmission module is a WIFI module, which communicates with the display terminal through a local WIFI network.

5. The electric engineering machinery thermal balance test device according to any one of claims 1-4, characterized in that, The plurality of temperature sensors include at least an ambient temperature sensor, a gearbox oil temperature sensor, a battery cooling inlet temperature sensor, a hydraulic oil temperature sensor, and a motor cooling inlet temperature sensor.

6. The thermal balance testing device for electric engineering machinery according to claim 5, characterized in that, The plurality of temperature sensors also include a battery cooling outlet temperature sensor and a motor cooling outlet temperature sensor.

7. The thermal balance testing device for electric engineering machinery according to claim 6, characterized in that, The temperature sensor is positioned in at least one of the following locations: The ambient temperature sensor is located on the vehicle frame at a position corresponding to the area below the driver's cab. The transmission oil temperature sensor is inserted into the transmission. The battery cooling outlet temperature sensor is inserted into the battery cooling water outlet pipe; The battery cooling inlet temperature sensor is inserted into the battery cooling water inlet pipe; The hydraulic oil temperature sensor is inserted into the inlet pipe of the hydraulic oil radiator; The motor cooling inlet temperature sensor is inserted into the cooling water inlet pipe of the motor thermal management cooling radiator. The motor cooling outlet temperature sensor is inserted into the cooling water outlet pipe of the motor thermal management cooling radiator.

8. The thermal balance testing device for electric engineering machinery according to claim 1, characterized in that, The radiator is mounted on the frame of the electric engineering machinery; The radiator integrates a hydraulic oil radiator, a transmission oil radiator, and a motor and battery thermal management coolant radiator.

9. A method for thermal balance testing of electric engineering machinery, characterized in that, The method employs the electric engineering machinery thermal balance test apparatus as described in any one of claims 1-8; the method includes: The electric construction machinery is started and controlled to perform different working conditions; during the operation, the temperature sensor sends an analog signal representing the temperature to the whole machine controller; The data acquisition and parser is communicatively connected to the overall controller to receive the analog signals on the overall bus and perform real-time parsing of the analog signals; The display terminal is communicatively connected to the data acquisition and parsing unit to receive the parsed temperature data and display it through a webpage.

10. The method for thermal balance testing of electric engineering machinery according to claim 9, characterized in that, The method for the data acquisition and parsing unit to perform real-time parsing of the analog signal specifically includes: According to the DBC protocol, the analog signal is parsed to obtain at least one of the following: ambient temperature data, motor radiator inlet temperature data, hydraulic oil radiator inlet temperature data, power battery thermal management system radiator inlet temperature data, and transmission oil temperature data.

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