Device and method for simulating corrosion of cooling liquid of electric vehicle

Abstract

The invention provides an electric vehicle cooling liquid corrosion simulation device and method. The device comprises a liquid supplementing module, a radiator, an electronic water pump, a liquid storage tank, a motor shell, a battery water cooling plate and an electric control cooling module. The liquid supplementing module is used for supplementing cooling liquid to the radiator; the two sides of the electronic water pump communicate with backflow pipelines, and backflow valves are arranged on the backflow pipelines. A sampling pipeline is arranged on the liquid outlet pipeline, and a sampling valve is arranged on the sampling pipeline, so that the cooling liquid in the device can be sampled at any time; the liquid supplementing module ensures that liquid can be supplemented to the system in a non-stop state; the backflow pipeline and the backflow valve can adjust the pressure of the circulation loop at any time, and it is guaranteed that the flow speed of cooling liquid in the circulation loop is constant; according to the device and the method, the actual operation environment of the cooling liquid in the whole vehicle thermal management system is accurately simulated, various indexes of the cooling liquid can be more conveniently evaluated, and testing does not need to be carried out in an actual electric vehicle.

Description

Technical Field

[0001] This invention belongs to the technical field of corrosion testing equipment, specifically relating to a device and method for simulating corrosion of electric vehicle coolant. Background Technology

[0002] With the rapid development of electric vehicles, their thermal management systems, especially the battery, motor, and electronic control systems, are placing increasingly stringent demands on the performance of coolants. The corrosiveness of the coolant to various metallic and non-metallic materials within the system during long-term cyclic use directly affects the system's safety, reliability, and service life. To efficiently and accurately evaluate the long-term corrosion protection performance of coolants specifically designed for electric vehicles, there is an urgent need to develop a testing instrument capable of simulating actual operating conditions.

[0003] Utility model CN221976699U provides a simulated circulating corrosion tester for electric vehicle coolant, belonging to the technical field of corrosion testing equipment. It includes a radiator, an electronically controlled water pump, a power battery cooling module, a coolant reservoir, a motor cooling water jacket, and an electronically controlled cooling module, all connected in a circulating loop. It meets the testing requirements of coolant in pure electric vehicles, making coolant testing in pure electric vehicles more accurate.

[0004] However, the utility model CN221976699U cannot replenish the circulating circuit in real time, and the liquid flow in the circulating circuit will be continuously consumed. The measuring instrument cannot provide a continuous and stable coolant environment for it. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the purpose of this invention is to provide a device and method for simulating corrosion of electric vehicle coolant.

[0006] The electric vehicle coolant corrosion simulation device provided by the present invention includes: a coolant replenishment module, a radiator, an electronic water pump, a coolant storage tank, a motor housing, a battery water cooling plate, and an electronically controlled cooling module;

[0007] The outlet of the radiator is connected to the inlet of the storage tank, motor housing, battery water cooling plate and electronic control cooling module through the inlet pipe. The outlets of the storage tank, motor housing, battery water cooling plate and electronic control cooling module are connected to the inlet of the radiator through the outlet pipe, forming a circulation loop.

[0008] The electronic water pump is installed on the liquid inlet pipe and is used to drive the coolant to flow in the circulation loop;

[0009] The coolant replenishment module is used to replenish the coolant to the radiator;

[0010] The electronic water pump has return pipes connected to both sides, and a return valve is installed on the return pipes.

[0011] A sampling pipe is provided on the liquid outlet pipe, and a sampling valve is provided on the sampling pipe;

[0012] The replenishment module includes a filling pump, a filling valve, a replenishment tank, and a liquid level sensor;

[0013] The replenishment tank is located at the highest point of the device and is used to automatically supply liquid to the circulation loop;

[0014] The liquid level sensor detects the liquid level in the replenishment tank in real time.

[0015] The filling pump and filling valve are used to fill the replenishment tank with liquid.

[0016] Preferably, the storage tank includes a tank body and a tank cover. The tank body is provided with a pH electrode and a conductivity electrode. A heating belt is wrapped around the outside of the tank body. A temperature sensor is provided on the tank cover.

[0017] Preferably, a filter is provided on the liquid inlet pipe.

[0018] Preferably, three parallel branch pipes are provided between the liquid inlet pipe and the liquid outlet pipe, and the motor housing, the battery water cooling plate and the electronic control cooling module are respectively installed on the three parallel branch pipes, with the liquid storage tank and the motor housing on one branch.

[0019] Preferably, each of the branch pipelines is equipped with a throttling valve.

[0020] Preferably, an observation tube is provided on the water outlet pipe.

[0021] Preferably, the water inlet pipe is provided with a drain pipe, and the drain pipe is provided with a drain valve.

[0022] Preferably, a flow sensor is installed on the liquid inlet pipe.

[0023] The present invention also provides a method for simulating corrosion of electric vehicle coolant, using any of the above-mentioned devices, comprising: adding coolant to the radiator, performing heat dissipation and cooling treatment on the coolant, turning on the electronic water pump, driving the coolant to flow from the inlet pipe to the storage tank, motor housing, battery water cooling plate, and electronic control cooling module, and then flowing back to the radiator through the outlet pipe;

[0024] During the coolant circulation process, the pressure of the circulation loop is adjusted in real time by the reflux valve, and the coolant replenishment module replenishes the coolant in the circulation loop in real time. When the liquid in the circulation loop is insufficient, the liquid in the replenishment tank automatically flows into the circulation loop. The liquid level sensor detects the liquid level in the replenishment tank in real time. When the liquid level in the replenishment tank is insufficient, the filling pump and filling valve are turned on to fill the tank until the upper limit liquid level set by the liquid level sensor is met.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. The electric vehicle coolant corrosion simulation device provided in this application accurately simulates the actual operating environment of coolant in the vehicle thermal management system, which can more conveniently evaluate various indicators of coolant without the need for testing in actual electric vehicles, thus saving costs.

[0027] 2. The coolant replenishment module ensures that the system can be replenished without stopping the machine, making the system more stable and reliable during operation and ensuring long-term, uninterrupted, and stable circulation of coolant.

[0028] 3. The return pipe and return valve can adjust the pressure of the circulation loop at any time to maintain the pressure stability in the circulation loop and ensure that the flow rate of coolant in the circulation loop is constant.

[0029] 4. The sampling valve can be opened to sample the coolant at any time, allowing for real-time monitoring of the coolant status in the circulation loop. Attached Figure Description

[0030] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0031] Figure 1 A schematic diagram of a device for simulating corrosion of electric vehicle coolant.

[0032] The diagram shows:

[0033] Liquid replenishment module 1, sampling pipeline 23

[0034] Radiator 2 Sampling valve 24

[0035] Electric water pump 3, filter 25

[0036] Storage tank 4, throttle valve 26

[0037] Motor housing 5, observation tube 27

[0038] Battery water cooling plate 6, drain pipe 28

[0039] Electrically controlled cooling module 7, drain valve 29

[0040] Filling pump 11 Return pipe 31

[0041] Filling valve 12 Return valve 32

[0042] 13 fluid replenishment tanks, 41 tank bodies

[0043] Liquid level sensor 14, tank lid 42

[0044] Flow sensor 20 pH electrode 43

[0045] Liquid inlet pipe 21, conductivity electrode 44

[0046] Liquid outlet pipe 22, heating belt 45

[0047] Pressure sensor 260, Temperature sensor 46 Detailed Implementation

[0048] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the scope of protection of the present invention.

[0049] like Figure 1 As shown, this embodiment provides a device for simulating corrosion of electric vehicle coolant, including: a replenishment module 1, a radiator 2, an electronic water pump 3, a reservoir 4, a motor housing 5, a battery water cooling plate 6, and an electronically controlled cooling module 7.

[0050] The outlet of the radiator 2 is connected to the inlet of the storage tank 4, the motor housing 5, the battery water cooling plate 6 and the electronic control cooling module 7 through the inlet pipe 21. The outlets of the storage tank 4, the motor housing 5, the battery water cooling plate 6 and the electronic control cooling module 7 are connected to the inlet of the radiator 2 through the outlet pipe 22, forming a circulation loop.

[0051] An electronic water pump 3 is installed on the inlet pipe 21 to drive the coolant to flow in the circulation loop;

[0052] The coolant replenishment module 1 is used to replenish coolant to the radiator 2;

[0053] The electric water pump 3 has return pipes 31 connected to both sides, and a return valve 32 is installed on the return pipe 31. By adjusting the return valve, the pressure of the entire circulation loop can be adjusted in real time.

[0054] A sampling pipe 23 is installed on the outlet pipe 22, and a sampling valve 24 is installed on the sampling pipe 23. The sampling valve 24 can be opened at any time to sample the coolant.

[0055] The liquid replenishment module 1 includes a filling pump 11, a filling valve 12, a replenishment tank 13, and a liquid level sensor 14. The replenishment tank 13 is located at the highest point of the device and is used to automatically supply liquid to the circulation loop. The liquid level sensor 14 detects the liquid level in the replenishment tank 13 in real time. The filling pump 11 and the filling valve 12 are used to fill the replenishment tank 13 with liquid.

[0056] In one embodiment, the storage tank 4 includes a tank body 41 and a tank cover 42. A pH electrode 43 and a conductivity electrode 44 are provided on the tank body 41. A heating belt 45 is wrapped around the outside of the storage tank 4. A temperature sensor 46 is provided on the tank cover 42.

[0057] In one embodiment, a filter 25 is provided on the liquid inlet pipe 21.

[0058] In one embodiment, three parallel branch pipes are provided between the liquid inlet pipe 21 and the liquid outlet pipe 22. The motor housing 5, the battery water cooling plate 6, and the electronic control cooling module 7 are respectively located on the three parallel branch pipes, and the liquid storage tank 4 and the motor housing 5 are on one branch.

[0059] In one embodiment, each branch pipeline is equipped with a throttle valve 26 and a pressure sensor 260.

[0060] The liquid storage tank 4, motor housing 5, battery water cooling plate 6, and electronic control cooling module 7 are connected in parallel in three circuits and work independently. Each circuit has a corresponding throttle valve 26 to control the flow rate. If a fault such as leakage or blockage occurs in one circuit, the throttle valve 26 of that circuit can be closed for maintenance without affecting the operation of other circuits.

[0061] In one embodiment, an observation tube 27 is provided on the liquid outlet pipe 22.

[0062] In one embodiment, a drain pipe 28 is provided on the water inlet pipe 21, and a drain valve 29 is provided on the drain pipe 28.

[0063] In one embodiment, a flow sensor 20 is provided on the inlet pipe 21.

[0064] In one embodiment, the heat sink 2 is a cooling fan.

[0065] This embodiment also provides a method for simulating corrosion of electric vehicle coolant, which is carried out using the electric vehicle coolant corrosion simulation device provided above. Coolant is added to radiator 2 to cool down the coolant. The electronic water pump 3 is turned on to drive the coolant from the inlet pipe 21 to the storage tank 4, motor housing 5, battery water cooling plate 6, and electronic control cooling module 7, and then flows back to radiator 2 through outlet pipe 22.

[0066] During the coolant circulation process, the pressure of the circulation loop is adjusted in real time by regulating the return valve 32, and the coolant replenishment module 1 replenishes the coolant in the circulation loop in real time. When the liquid in the circulation loop is insufficient, the liquid in the replenishment tank 13 automatically flows into the circulation loop. The liquid level sensor 14 detects the liquid level in the replenishment tank 13 in real time. When the liquid level in the replenishment tank 13 is insufficient, the filling pump 11 and the filling valve 12 are turned on to fill the tank until the upper limit liquid level set by the liquid level sensor 14 is met.

[0067] This device simulates the state of each circuit of the coolant in an actual electric vehicle and verifies the state of the electric vehicle's three-electric system, namely the motor housing 5, the battery water cooling plate 6, and the electronic control cooling module 7, through a 1064-hour test. Then, by calculating the changes of each test piece in the coolant tank 4, it measures various indicators of the coolant.

[0068] The radiator ensures dynamic temperature circulation, the return pipe 31 ensures a constant flow rate, the liquid storage tank 4 allows various key materials to come into contact with the coolant, and the liquid replenishment module replenishes the system without stopping the machine, making the system more stable and reliable during operation and ensuring long-term circulation of the coolant.

[0069] This device accurately simulates the actual operating environment of coolant in the vehicle's thermal management system, making its test results closer to reality.

[0070] During the experiment, the coolant replenishment module 1 automatically replenishes the circulating loop with coolant, adjusts the opening of the reflux valve 32 to regulate the pressure of the circulating loop, and opens the sampling valve 24 to sample the coolant in the circulating loop at any time through the sampling pipe 23. This ensures the operational stability of the device and allows for continuous monitoring of the coolant.

[0071] This apparatus and method allow for the systematic evaluation of the corrosion rate, pitting tendency, galvanic corrosion effect, and material compatibility of coolants on different materials within a system. Following testing, the samples are characterized in detail using methods such as weight loss analysis, surface morphology analysis (SEM), compositional analysis (EDS / XPS), and electrochemical testing.

[0072] This simulation device provides a powerful experimental tool for the development, performance screening, life prediction, and industry standard setting of electric vehicle coolant, based on the operating environment of the coolant. It significantly improves the relevance and efficiency of the test and provides a reference for ensuring the long-term reliable operation of the electric vehicle thermal management system.

[0073] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0074] Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A device for simulating corrosion of electric vehicle coolant, characterized in that, include: The liquid replenishment module (1), radiator (2), electronic water pump (3), liquid storage tank (4), motor housing (5), battery water cooling plate (6), and electronic control cooling module (7); The outlet of the radiator (2) is connected to the inlet of the storage tank (4), motor housing (5), battery water cooling plate (6) and electronic control cooling module (7) through the inlet pipe (21). The outlets of the storage tank (4), motor housing (5), battery water cooling plate (6) and electronic control cooling module (7) are connected to the inlet of the radiator (2) through the outlet pipe (22) to form a circulation loop. The electronic water pump (3) is installed on the liquid inlet pipe (21) and is used to drive the coolant to flow in the circulation loop; The liquid replenishment module (1) is used to replenish the coolant to the radiator (2); The electronic water pump (3) is connected to two sides by a return pipe (31), and a return valve (32) is provided on the return pipe (31). A sampling pipe (23) is provided on the liquid outlet pipe (22), and a sampling valve (24) is provided on the sampling pipe (23); The replenishment module (1) includes a filling pump (11), a filling valve (12), a replenishment tank (13), and a liquid level sensor (14); The replenishment tank (13) is located at the highest point of the device and is used to automatically supply liquid to the circulation loop; The liquid level sensor (14) detects the liquid level in the replenishment tank (13) in real time; The filling pump (11) and filling valve (12) are used to fill the liquid tank (13) with liquid.

2. The electric vehicle coolant simulated corrosion device according to claim 1, characterized in that, The storage tank (4) includes a tank body (41) and a tank cover (42). A pH electrode (43) and a conductivity electrode (44) are provided on the tank body (41). A heating belt (45) is wrapped around the outside of the tank body (41). A temperature sensor (46) is provided on the tank cover (42).

3. The electric vehicle coolant simulated corrosion device according to claim 1, characterized in that, A filter (25) is installed on the liquid inlet pipe (21).

4. The electric vehicle coolant corrosion simulation device according to claim 1, characterized in that, Three parallel branch pipes are provided between the liquid inlet pipe (21) and the liquid outlet pipe (22). The motor housing (5), the battery water cooling plate (6) and the electronic control cooling module (7) are respectively installed on the three parallel branch pipes. The liquid storage tank (4) and the motor housing (5) are on one branch.

5. The electric vehicle coolant corrosion simulation device according to claim 4, characterized in that, Each branch pipeline is equipped with a throttle valve (26) and a pressure sensor (260).

6. The electric vehicle coolant simulated corrosion device according to claim 1, characterized in that, An observation tube (27) is installed on the water outlet pipe (22).

7. The electric vehicle coolant corrosion simulation device according to claim 1, characterized in that, The water inlet pipe (21) is provided with a liquid discharge pipe (28), and the liquid discharge pipe (28) is provided with a liquid discharge valve (29).

8. The electric vehicle coolant corrosion simulation device according to claim 1, characterized in that, A flow sensor (20) is installed on the liquid inlet pipe (21).

9. A method for simulating corrosion of electric vehicle coolant, using the apparatus according to any one of claims 1 to 8, characterized in that, include: Add coolant to the radiator (2) to cool it down. Turn on the electronic water pump (3) to drive the coolant from the inlet pipe (21) to the storage tank (4), motor housing (5), battery water cooling plate (6), and electronic control cooling module (7), and then flow back to the radiator (2) through the outlet pipe (22). During the circulation of the coolant, the pressure of the circulation loop is adjusted in real time by the reflux valve (32), and the replenishment module (1) replenishes the coolant in the circulation loop in real time. When the liquid in the circulation loop is insufficient, the liquid in the replenishment tank (13) automatically flows into the circulation loop. The liquid level sensor (14) detects the liquid level in the replenishment tank (13) in real time. When the liquid level in the replenishment tank (13) is insufficient, the filling pump (11) and the filling valve (12) are turned on to fill the liquid until the upper limit liquid level set by the liquid level sensor (14) is met.

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