Vehicle-mounted liquid cooling unit test tool and test method thereof

Abstract

The invention discloses a vehicle-mounted liquid cooling unit test tool and a test method thereof, and relates to the technical field of thermal management system detection equipment.The method comprises the steps that the battery side liquid inlet temperature T1 of a tested vehicle-mounted liquid cooling unit is detected through a battery side water storage tank temperature sensor; the battery side liquid outlet temperature T2 of the detected vehicle-mounted liquid cooling unit is detected through the battery side liquid outlet temperature sensor, the electric control side liquid inlet temperature T3 of the detected vehicle-mounted liquid cooling unit is detected through the electric control side water storage tank temperature sensor, and the electric control side liquid outlet temperature T4 of the detected vehicle-mounted liquid cooling unit is detected through the electric control side liquid outlet temperature sensor. The invention mainly solves the problem of how to provide a vehicle-mounted liquid cooling unit test tool and a test method thereof. The system has the characteristics of rapidness, high efficiency and high integration degree, solves the problems of long time consumption, high capital investment and difficulty in adapting to rapid test of the refrigerating capacity test of the vehicle-mounted liquid cooling unit, and can improve the cleanliness and safety of the test environment.

Description

Technical Field

[0001] This invention relates to the field of thermal management system testing equipment technology, specifically to a vehicle-mounted liquid cooling unit testing fixture and its testing method. Background Technology

[0002] New energy vehicles that use electric motors as one of their driving forces are gradually gaining market share.

[0003] The thermal management system of new energy vehicles differs significantly from that of traditional vehicles. For example, in addition to meeting the temperature control requirements of the driver's cab, the thermal management system of new energy vehicles also needs to meet the temperature control requirements of the battery pack, motor, and controllers. Therefore, the thermal management system of new energy vehicles needs to be equipped with at least two liquid cooling medium outlets to meet the temperature control requirements of the battery pack and the electric drive devices respectively.

[0004] Thermal management systems used in new energy vehicles typically employ highly integrated liquid cooling units. This means that the compressor, condenser, throttling device, and evaporative heat exchanger from the refrigeration module, as well as the water pump, electronically controlled valve, and liquid cooling medium pipeline from the liquid cooling module, are all integrated into a single unit, which is called a liquid cooling unit. In addition, liquid cooling units usually have inlet and outlet terminals, allowing the liquid cooling radiators at the battery pack and electric drive unit to be quickly connected to the liquid cooling unit. The high-temperature liquid cooling medium enters the liquid cooling unit from the inlet terminal and is cooled to a low-temperature liquid cooling medium, which is then output from the outlet terminal.

[0005] The aforementioned liquid-cooled units require multiple performance tests before leaving the factory, among which the cooling capacity test is one of the important performance tests. The cooling capacity test of existing liquid-cooled units is usually carried out in an enthalpy difference chamber to obtain the cooling capacity of the liquid-cooled unit. Although the above test method yields accurate results, it is time-consuming and requires high capital investment, making it difficult to adapt to the rapid testing of liquid-cooled units.

[0006] In summary, how to provide fast, efficient, and highly integrated testing fixtures and methods for vehicle-mounted liquid cooling units has become an urgent problem to be solved. Summary of the Invention

[0007] The purpose of this invention is to provide a test fixture and test method for a vehicle-mounted liquid cooling unit, which has the characteristics of being fast, efficient and highly integrated.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a vehicle-mounted liquid cooling unit testing fixture for testing the vehicle-mounted liquid cooling unit under test; it includes a battery-side circulation channel, an electronic control-side circulation channel, and an injection / discharge channel; the battery-side circulation channel includes a battery-side water tank, a battery-side liquid inlet pipe, and a battery-side liquid outlet pipe; a battery-side water tank temperature sensor is configured at the battery-side water tank to detect the temperature of the liquid cooling medium in the battery-side water tank; the battery-side liquid inlet pipe is led out from the battery-side water tank and connected to the battery-side liquid inlet end of the vehicle-mounted liquid cooling unit under test, and the... A battery-side inlet flow meter is installed at the battery-side liquid inlet pipe to detect the flow rate of the liquid cooling medium flowing through the battery-side liquid inlet pipe; the battery-side outlet pipe is led out from the battery-side water tank and connected to the battery-side outlet of the tested vehicle-mounted liquid cooling unit, and a battery-side outlet temperature sensor is installed at the battery-side outlet pipe to detect the temperature of the liquid cooling medium flowing through the battery-side outlet pipe; the electronic control side circulation channel includes an electronic control side water tank, an electronic control side inlet pipe, and an electronic control side outlet pipe; an electronic control side water tank temperature sensor is installed at the electronic control side water tank to detect the temperature of the stored water. The temperature of the liquid cooling medium in the tank; the electronically controlled liquid inlet pipe is led out from the electronically controlled water tank and connected to the electronically controlled liquid inlet end of the tested vehicle-mounted liquid cooling unit, and an electronically controlled liquid inlet flow meter is installed at the electronically controlled liquid inlet pipe to detect the flow rate of the liquid cooling medium flowing through the electronically controlled liquid inlet pipe; the electronically controlled liquid outlet pipe is led out from the electronically controlled water tank and connected to the electronically controlled liquid outlet end of the tested vehicle-mounted liquid cooling unit, and an electronically controlled liquid outlet temperature sensor is installed at the electronically controlled liquid outlet pipe to detect the temperature of the liquid cooling medium flowing through the electronically controlled liquid outlet pipe; the air injection and liquid discharge flow... The air injection and drainage channel is connected to the battery-side liquid inlet pipe of the battery-side circulation channel to inject compressed air into the battery-side liquid inlet pipe, thereby pushing the liquid cooling medium in the battery-side liquid inlet pipe, the battery side of the tested vehicle-mounted liquid cooling unit, and the battery-side liquid outlet pipe back to the battery-side water tank; and the air injection and liquid discharge channel is also connected to the electronic control-side liquid inlet pipe of the electronic control-side circulation channel to inject compressed air into the electronic control-side liquid inlet pipe, thereby pushing the liquid cooling medium in the electronic control-side liquid inlet pipe, the electronic control side of the tested vehicle-mounted liquid cooling unit, and the electronic control-side liquid outlet pipe back to the electronic control-side water tank.

[0009] In the above technical solution, a battery-side liquid inlet controllable valve is provided at the battery-side liquid inlet pipe; and a battery-side liquid outlet controllable valve is provided at the battery-side liquid outlet pipe.

[0010] In the above technical solution, a battery-side drain branch pipe is connected in parallel to the battery-side liquid outlet pipe; a battery-side drain check valve is configured at the battery-side drain branch pipe.

[0011] In the above technical solution, an electrically controlled liquid inlet valve is provided at the electrically controlled liquid inlet pipe; an electrically controlled liquid outlet valve is provided at the electrically controlled liquid outlet pipe.

[0012] In the above technical solution, an electrically controlled side drain branch pipe is connected in parallel to the electrically controlled side liquid outlet pipe; an electrically controlled side drain check valve is configured at the electrically controlled side drain branch pipe.

[0013] In the above technical solution, the gas injection and liquid drainage channel includes a compressed air source, a battery-side gas injection and liquid drainage pipe, and an electronically controlled gas injection and liquid drainage pipe; the compressed air source is connected to the battery-side liquid inlet pipe of the battery-side circulation channel through the battery-side gas injection and liquid drainage pipe, and a battery-side gas injection controllable valve is configured at the battery-side gas injection and liquid drainage pipe; the compressed air source is connected to the electronically controlled liquid inlet pipe of the electronically controlled circulation channel through the electronically controlled gas injection and liquid drainage pipe, and an electronically controlled gas injection controllable valve is configured at the electronically controlled gas injection and liquid drainage pipe.

[0014] In the above technical solution, the electronically controlled side water tank of the electronically controlled side circulation channel and the battery-side water tank of the battery-side circulation channel are interconnected by a replenishment pump to pump the liquid cooling medium in the electronically controlled side water tank to the battery-side water tank; the battery-side water tank of the battery-side circulation channel is located at a high position, and the electronically controlled side water tank of the electronically controlled side circulation channel is located at a low position. The battery-side water tank of the battery-side circulation channel and the electronically controlled side water tank of the electronically controlled side circulation channel are interconnected by a replenishment controllable valve. When the replenishment controllable valve is opened, the liquid cooling medium in the battery-side water tank can flow to the electronically controlled side water tank under the action of gravity; at least one of the electronically controlled side water tank of the electronically controlled side circulation channel and the battery-side water tank of the battery-side circulation channel is connected to a replenishment pipe.

[0015] A testing method for a vehicle-mounted liquid-cooled unit, utilizing the aforementioned testing fixture for vehicle-mounted liquid-cooled units; the method includes:

[0016] S1. Connect the battery-side liquid inlet pipe to the battery-side liquid inlet of the vehicle-mounted liquid cooler unit under test, connect the battery-side liquid outlet pipe to the battery-side liquid outlet of the vehicle-mounted liquid cooler unit under test, connect the electronic control-side liquid inlet pipe to the electronic control-side liquid inlet of the vehicle-mounted liquid cooler unit under test, and connect the electronic control-side liquid outlet pipe to the electronic control-side liquid outlet of the vehicle-mounted liquid cooler unit under test.

[0017] S2. Connect the battery-side liquid inlet pipe, the battery-side liquid outlet pipe, the electronic control-side liquid inlet pipe, and the electronic control-side liquid outlet pipe, and start the vehicle-mounted liquid cooling unit under test, so that the liquid medium is driven to circulate in the battery-side circulation channel and the electronic control-side circulation channel respectively by the driving force of the vehicle-mounted liquid cooling unit under test.

[0018] S3. After the tested vehicle-mounted liquid cooling unit reaches a steady state, the battery-side inlet liquid temperature T1 of the tested vehicle-mounted liquid cooling unit is detected by the battery-side water tank temperature sensor, and the battery-side outlet liquid temperature T2 of the tested vehicle-mounted liquid cooling unit is detected by the battery-side outlet liquid temperature sensor; the actual cooling capacity Q1 of the tested vehicle-mounted liquid cooling unit on the battery side is calculated using the following formula:

[0019]

[0020] Where C is the specific heat capacity of the liquid medium, in kJ / (kg·℃), and ρ is the density of the liquid medium, in kg / m³. 3 ΔT1 is (battery-side inlet temperature T1 - battery-side outlet temperature T2), in °C;

[0021] Furthermore, after the tested vehicle-mounted liquid cooling unit reaches a steady state, the inlet liquid temperature T3 on the electronic control side of the tested vehicle-mounted liquid cooling unit is detected by the temperature sensor of the water tank on the electronic control side, and the outlet liquid temperature T4 on the electronic control side of the tested vehicle-mounted liquid cooling unit is detected by the temperature sensor of the outlet liquid temperature on the electronic control side; the actual cooling capacity Q2 on the electronic control side of the tested vehicle-mounted liquid cooling unit is calculated using the following formula:

[0022]

[0023] Where C is the specific heat capacity of the liquid medium, in kJ / (kg·℃), and ρ is the density of the liquid medium, in kg / m³. 3 ΔT2 is (inlet temperature T3 on the electronically controlled side - outlet temperature T4 on the electronically controlled side), in °C;

[0024] S4. Open the air injection and drainage channel to inject compressed air into the battery-side liquid inlet pipe, thereby pushing the liquid cooling medium in the battery-side liquid inlet pipe, the battery side of the tested vehicle-mounted liquid cooling unit, and the battery-side liquid outlet pipe back to the battery-side water tank; and inject compressed air into the electronic control side liquid inlet pipe, thereby pushing the liquid cooling medium in the electronic control side liquid inlet pipe, the electronic control side of the tested vehicle-mounted liquid cooling unit, and the electronic control side liquid outlet pipe back to the electronic control side water tank;

[0025] S5. After the liquid cooling medium in the battery-side liquid inlet pipe, the battery side of the vehicle-mounted liquid cooler unit under test, the electronic control side liquid inlet pipe, and the electronic control side of the vehicle-mounted liquid cooler unit under test are emptied, close the battery-side liquid inlet pipe, the battery-side liquid outlet pipe, the electronic control side liquid inlet pipe, the electronic control side liquid outlet pipe, and the gas injection and drainage channel to end the test.

[0026] In the above technical solution, a battery-side liquid inlet controllable valve is configured at the battery-side liquid inlet pipe, a battery-side liquid outlet controllable valve is configured at the battery-side liquid outlet pipe, an electronically controlled liquid inlet controllable valve is configured at the electronically controlled liquid inlet pipe, and an electronically controlled liquid outlet controllable valve is configured at the electronically controlled liquid outlet pipe; in step S2, when the battery-side liquid inlet pipe, the battery-side liquid outlet pipe, the electronically controlled liquid inlet pipe, and the electronically controlled liquid outlet pipe are connected, the battery-side liquid inlet controllable valve, the battery-side liquid outlet controllable valve, the electronically controlled liquid inlet controllable valve, and the electronically controlled liquid outlet controllable valve are all switched to the connected state; in step S5, when the battery-side liquid inlet pipe, the battery-side liquid outlet pipe, the electronically controlled liquid inlet pipe, and the electronically controlled liquid outlet pipe are closed, the battery-side liquid inlet controllable valve, the battery-side liquid outlet controllable valve, the electronically controlled liquid inlet controllable valve, and the electronically controlled liquid outlet controllable valve are all switched to the closed state.

[0027] In the above technical solution, the gas injection and drainage channel includes a compressed air source, a battery-side gas injection and drainage pipe, and an electronically controlled gas injection and drainage pipe; the compressed air source is connected to the battery-side liquid inlet pipe of the battery-side circulation channel through the battery-side gas injection and drainage pipe, and a battery-side gas injection controllable valve is configured at the battery-side gas injection and drainage pipe; the compressed air source is connected to the electronically controlled liquid inlet pipe of the electronically controlled circulation channel through the electronically controlled gas injection and drainage pipe, and an electronically controlled gas injection controllable valve is configured at the electronically controlled gas injection and drainage pipe; in step S2, when the gas injection and drainage channel is opened, both the battery-side gas injection controllable valve and the electronically controlled gas injection controllable valve are switched to the open state; in step S5, when the gas injection and drainage channel is closed, both the battery-side gas injection controllable valve and the electronically controlled gas injection controllable valve are switched to the closed state.

[0028] Compared with the prior art, the beneficial effects of the present invention are as follows: The vehicle-mounted liquid cooling unit test fixture and test method of the present invention detect the battery-side inlet liquid temperature T1 of the vehicle-mounted liquid cooling unit under test through a battery-side water tank temperature sensor, and detect the battery-side outlet liquid temperature T2 of the vehicle-mounted liquid cooling unit under test through a battery-side outlet liquid temperature sensor. The actual cooling capacity Q1 of the vehicle-mounted liquid cooling unit under test can be obtained by calculation. The electronic control side inlet liquid temperature T3 of the vehicle-mounted liquid cooling unit under test is detected through an electronic control side water tank temperature sensor, and the electronic control side outlet liquid temperature T4 of the vehicle-mounted liquid cooling unit under test is detected through an electronic control side outlet liquid temperature sensor. The actual cooling capacity Q2 of the electronic control side of the vehicle-mounted liquid cooling unit under test can be obtained by calculation. The vehicle-mounted liquid cooling unit test fixture and test method of the present invention have the characteristics of being fast, efficient and highly integrated, solving the problems of long testing time, high capital investment and difficulty in adapting to rapid testing of vehicle-mounted liquid cooling units, and improving the cleanliness and safety of the testing environment. Attached Figure Description

[0029] Figure 1 This is a structural view of the vehicle-mounted liquid cooling unit test fixture of the present invention.

[0030] The attached diagram is labeled as follows: 100, Test vehicle-mounted liquid cooling unit; 100a, Battery-side liquid inlet; 100b, Battery-side liquid outlet; 100c, Electronic control-side liquid inlet; 100d, Electronic control-side liquid outlet; 101, Battery-side water tank; 101a, Battery-side water tank temperature sensor; 102, Battery-side liquid inlet pipe; 102a, Battery-side liquid inlet flow meter; 102b, Battery-side liquid inlet controllable valve; 103, Battery-side liquid outlet pipe; 103a, Battery-side liquid outlet temperature sensor; 103b, Battery-side liquid outlet controllable valve; 103c, Battery-side drain branch pipe; 103d, Battery-side drain check valve; 201, Electronic control-side water tank. 201a, Temperature sensor for water storage tank on the electronic control side; 202, Liquid inlet pipe on the electronic control side; 202a, Liquid inlet flow meter on the electronic control side; 202b, Controllable liquid inlet valve on the electronic control side; 203, Liquid outlet pipe on the electronic control side; 203a, Liquid outlet temperature sensor on the electronic control side; 203b, Controllable liquid outlet valve on the electronic control side; 203c, Liquid drain branch pipe on the electronic control side; 203d, Liquid drain check valve on the electronic control side; 301, Compressed air source; 302, Gas injection and liquid drain pipe on the battery side; 302a, Gas injection controllable valve on the battery side; 303, Gas injection and liquid drain pipe on the electronic control side; 303a, Gas injection controllable valve on the electronic control side; 40, Liquid replenishment pump; 50, Liquid replenishment controllable valve; 60, Liquid replenishment pipe. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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 are within the scope of protection of the present invention.

[0032] This embodiment provides a test fixture for vehicle-mounted liquid cooling units, used to test the vehicle-mounted liquid cooling unit 100 under test (especially the cooling capacity test).

[0033] The vehicle-mounted liquid cooling unit 100 under test, i.e., the vehicle-mounted liquid cooling unit to be tested for cooling capacity, has at least a battery-side liquid inlet 100a, a battery-side liquid outlet 100b, an electronic control-side liquid inlet 100c, and an electronic control-side liquid outlet 100d. After the high-temperature liquid cooling medium enters the vehicle-mounted liquid cooling unit 100 under test from the battery-side liquid inlet 100a, it can be cooled into a low-temperature liquid cooling medium and output from the battery-side liquid outlet 100b. After the high-temperature liquid cooling medium enters the vehicle-mounted liquid cooling unit 100 under test from the electronic control-side liquid inlet 100c, it can be cooled into a low-temperature liquid cooling medium and output from the electronic control-side liquid outlet 100d. It can be understood that the vehicle-mounted liquid cooling unit 100 under test integrates a liquid cooling medium driving device (e.g., an electronic water pump) to drive the flow of the liquid cooling medium.

[0034] Please see Figure 1 The vehicle-mounted liquid cooling unit test fixture of this embodiment includes a battery-side circulation channel, an electronic control-side circulation channel, and an air injection and liquid discharge channel.

[0035] The battery-side circulation channel includes a battery-side water tank 101, a battery-side liquid inlet pipe 102, and a battery-side liquid outlet pipe 103.

[0036] A battery-side water tank temperature sensor 101a is provided at the battery-side water tank 101 to detect the temperature of the liquid cooling medium in the battery-side water tank 101.

[0037] The battery-side water tank 101 is a container for storing liquid cooling medium and has a certain degree of corrosion resistance. The battery-side water tank temperature sensor 101a is a liquid temperature sensor used to detect the temperature of the liquid cooling medium in the battery-side water tank 101 and can transmit the temperature to the host computer. The battery-side liquid inlet pipe 102 and the battery-side liquid outlet pipe 103 are both liquid cooling medium pipes, specifically flexible pipes.

[0038] The battery-side liquid inlet pipe 102 is led out from the battery-side water storage tank 101 and connected to the battery-side liquid inlet end 100a of the vehicle-mounted liquid cooling unit 100 under test. A battery-side liquid inlet flow meter 102a is provided at the battery-side liquid inlet pipe 102 to detect the flow rate of the liquid cooling medium flowing through the battery-side liquid inlet pipe 102. The battery-side liquid inlet flow meter 102a is an electronic flow sensor used to detect the total flow rate / flow rate per unit time of the liquid cooling medium in the pipe and can transmit the total flow rate / flow rate per unit time to the host computer.

[0039] The battery-side liquid outlet pipe 103 is led out from the battery-side water storage tank 101 and connected to the battery-side liquid outlet end 100b of the vehicle-mounted liquid cooling unit 100 under test. A battery-side liquid outlet temperature sensor 103a is provided at the battery-side liquid outlet pipe 103 to detect the temperature of the liquid cooling medium flowing through the battery-side liquid outlet pipe 103. The battery-side liquid outlet temperature sensor 103a is a liquid temperature sensor used to detect the temperature of the liquid cooling medium in the pipe and can transmit the temperature to the host computer.

[0040] The electrically controlled circulating channel includes an electrically controlled water storage tank 201, an electrically controlled liquid inlet pipe 202, and an electrically controlled liquid outlet pipe 203.

[0041] A temperature sensor 201a is installed at the water storage tank 201 on the electrical control side to detect the temperature of the liquid cooling medium in the water storage tank 201 on the electrical control side.

[0042] The electrically controlled water tank 201 is a container for storing liquid cooling medium and has a certain degree of corrosion resistance. The temperature sensor 201a of the electrically controlled water tank is a liquid temperature sensor used to detect the temperature of the liquid cooling medium in the electrically controlled water tank 201 and can transmit the temperature to the host computer. The electrically controlled liquid inlet pipe 202 and the electrically controlled liquid outlet pipe 203 are both liquid cooling medium pipes, specifically flexible pipes.

[0043] The electronically controlled liquid inlet pipe 202 is led out from the electronically controlled water storage tank 201 and connected to the electronically controlled liquid inlet end 100c of the vehicle-mounted liquid cooling unit 100 under test. An electronically controlled liquid inlet flow meter 202a is installed at the electronically controlled liquid inlet pipe 202 to detect the flow rate of the liquid cooling medium flowing through the electronically controlled liquid inlet pipe 202. The electronically controlled liquid inlet flow meter 202a is an electronic flow sensor used to detect the total flow rate / flow rate per unit time of the liquid cooling medium in the pipe and can transmit the total flow rate / flow rate per unit time to the host computer.

[0044] The liquid outlet pipe 203 on the electronic control side is led out from the water storage tank 201 on the electronic control side and connected to the liquid outlet end 100d on the electronic control side of the vehicle-mounted liquid cooling unit 100 under test. Furthermore, an electronic control side liquid outlet temperature sensor 203a is provided at the liquid outlet pipe 203 to detect the temperature of the liquid cooling medium flowing through the liquid outlet pipe 203. The liquid outlet temperature sensor 203a is a liquid temperature sensor used to detect the temperature of the liquid cooling medium in the pipe and can transmit the temperature to the host computer.

[0045] The air injection and drainage channel is connected to the battery-side liquid inlet pipe 102 of the battery-side circulation channel to inject compressed air into the battery-side liquid inlet pipe 102, thereby pushing the liquid cooling medium in the battery-side liquid inlet pipe 102, the battery side of the vehicle-mounted liquid cooling unit 100 under test, and the battery-side liquid outlet pipe 103 back to the battery-side water storage tank 101; and the air injection and drainage channel is also connected to the electronic control side liquid inlet pipe 202 of the electronic control side circulation channel to inject compressed air into the electronic control side liquid inlet pipe 202, thereby pushing the liquid cooling medium in the electronic control side liquid inlet pipe 202, the electronic control side of the vehicle-mounted liquid cooling unit 100 under test, and the electronic control side liquid outlet pipe 203 back to the electronic control side water storage tank 201.

[0046] Specifically, a battery-side liquid inlet controllable valve 102b is provided at the battery-side liquid inlet pipe 102. The battery-side liquid inlet controllable valve 102b is an electromagnetic fluid valve that can be opened / closed by a host computer. A battery-side liquid outlet controllable valve 103b is provided at the battery-side liquid outlet pipe 103. The battery-side liquid outlet controllable valve 103b is an electromagnetic fluid valve that can be opened / closed by a host computer.

[0047] Furthermore, a battery-side drain branch pipe 103c is connected in parallel to the battery-side liquid outlet pipe 103. This battery-side drain branch pipe 103c is a liquid cooling medium pipe, specifically a flexible pipe, which is connected in parallel to the battery-side liquid outlet pipe 103 in the form of a manifold. A battery-side drain check valve 103d is installed at the battery-side drain branch pipe 103c. This battery-side drain check valve 103d is a one-way check valve, which allows the liquid cooling medium to flow from the battery-side liquid outlet end 100b of the vehicle-mounted liquid cooling unit 100 under test to the battery-side water storage tank 101, but does not allow the liquid cooling medium to flow from the battery-side water storage tank 101 to the battery-side liquid outlet end 100b of the vehicle-mounted liquid cooling unit 100 under test.

[0048] Specifically, an electrically controlled liquid inlet valve 202b is provided at the electrically controlled liquid inlet pipe 202. This electrically controlled liquid inlet valve 202b is an electromagnetic fluid valve that can be opened / closed by a host computer. An electrically controlled liquid outlet valve 203b is provided at the electrically controlled liquid outlet pipe 203. This electrically controlled liquid outlet valve 203b is an electromagnetic fluid valve that can be opened / closed by a host computer.

[0049] Furthermore, an electrical control side drain branch pipe 203c is connected in parallel to the electrical control side liquid outlet pipe 203. This electrical control side drain branch pipe 203c is a liquid cooling medium pipe, specifically a flexible pipe, which is connected in parallel to the electrical control side liquid outlet pipe 203 in the form of a manifold. An electrical control side drain check valve 203d is installed at the electrical control side drain branch pipe 203c. This electrical control side drain check valve 203d is a one-way check valve, which allows the liquid cooling medium to flow from the electrical control side liquid outlet end 100d of the tested vehicle-mounted liquid cooling unit 100 to the electrical control side water storage tank 201, but does not allow the liquid cooling medium to flow from the electrical control side water storage tank 201 to the electrical control side liquid outlet end 100d of the tested vehicle-mounted liquid cooling unit 100.

[0050] Specifically, the gas injection and drainage channel includes a compressed air source 301, a battery-side gas injection and drainage pipe 302, and an electronically controlled gas injection and drainage pipe 303. The compressed air source 301 provides compressed air, such as a high-pressure air compressor or compressed air pipeline. Both the battery-side gas injection and drainage pipe 302 and the electronically controlled gas injection and drainage pipe 303 are fluid pipes, specifically flexible pipes, and possess a certain degree of pressure resistance. The compressed air source 301 connects to the battery-side liquid inlet pipe 102 of the battery-side circulation channel via the battery-side gas injection and drainage pipe 302, with its connection point located after the battery-side liquid inlet controllable valve 102b. Furthermore, a battery-side air injection controllable valve 302a is provided at the battery-side air injection and drainage pipe 302. This battery-side air injection controllable valve 302a is an electromagnetic fluid valve, which can be opened / closed by the host computer. The compressed air source 301 is connected to the electronically controlled liquid inlet pipe 202 of the electronically controlled circulation channel through the electronically controlled air injection and drainage pipe 303. Its connection node is located after the electronically controlled liquid inlet controllable valve 202b. Furthermore, an electronically controlled air injection controllable valve 303a is provided at the electronically controlled air injection and drainage pipe 303. This electronically controlled air injection controllable valve 303a is an electromagnetic fluid valve, which can be opened / closed by the host computer.

[0051] Furthermore, the electronically controlled water tank 201 in the electronically controlled circulation channel and the battery-side water tank 101 in the battery-side circulation channel are interconnected via a replenishment pump 40. This replenishment pump 40 is an electronic water pump, which, under the control of a host computer, can quantitatively pump liquid to transfer the liquid cooling medium from the electronically controlled water tank 201 to the battery-side water tank 101. The battery-side water tank 101 in the battery-side circulation channel is located at a higher position, while the electronically controlled water tank 201 in the electronically controlled circulation channel is located at a lower position. That is, the battery-side water tank 101 is positioned higher than the electronically controlled water tank 201. The battery-side water tank 101 in the battery-side circulation channel and the electronically controlled water tank 201 in the electronically controlled circulation channel are interconnected via a replenishment pump 40. 01 are interconnected via a liquid replenishment controllable valve 50 (i.e., a liquid cooling medium pipeline with a liquid replenishment controllable valve 50). The liquid replenishment controllable valve 50 is an electromagnetic fluid valve that can be opened / closed by a host computer. When the liquid replenishment controllable valve 50 is open, the liquid cooling medium in the battery-side water storage tank 101 can flow to the electronic control-side water storage tank 201 under the action of gravity. At least one of the electronic control-side water storage tank 201 in the electronic control-side circulation channel and the battery-side water storage tank 101 in the battery-side circulation channel is connected to a liquid replenishment pipeline 60. In this embodiment, the liquid replenishment pipeline 60 is an external pipeline with an electromagnetic fluid valve, used to replenish the liquid cooling medium to the electronic control-side water storage tank 201 / battery-side water storage tank 101.

[0052] It is understood that the vehicle-mounted liquid cooling unit test fixture in this embodiment also includes a host computer, which is one of an embedded chip-based controller, a programmable logic controller (PLC), and an industrial control computer; the battery-side water tank temperature sensor 101a, battery-side liquid inlet flow meter 102a, battery-side liquid inlet controllable valve 102b, battery-side liquid outlet temperature sensor 103a, battery-side liquid outlet controllable valve 103b, electronically controlled side water tank temperature sensor 201a, electronically controlled side liquid inlet flow meter 202a, electronically controlled side liquid inlet controllable valve 202b, electronically controlled side liquid outlet temperature sensor 203a, electronically controlled side liquid outlet controllable valve 203b, battery-side air injection controllable valve 302a, electronically controlled side air injection controllable valve 303a, replenishment pump 40, and replenishment controllable valve 50 are all connected to the host computer. The system includes analog input interfaces for the host computer and analog signal interfaces. Specifically, the battery-side water tank temperature sensor 101a, battery-side inlet flow meter 102a, battery-side outlet temperature sensor 103a, electronically controlled water tank temperature sensor 201a, electronically controlled inlet flow meter 202a, and electronically controlled outlet temperature sensor 203a are all connected to the host computer's analog input interface. The host computer controls the actuators of the battery-side inlet controllable valve 102b, battery-side outlet controllable valve 103b, electronically controlled inlet controllable valve 202b, electronically controlled outlet controllable valve 203b, battery-side air injection controllable valve 302a, electronically controlled air injection controllable valve 303a, replenishment pump 40, and replenishment controllable valve 50, respectively, using level control.

[0053] This embodiment also provides a test method for vehicle-mounted liquid cooling units, which uses the above-mentioned test fixture for vehicle-mounted liquid cooling units.

[0054] The method includes:

[0055] S1. Connect the battery-side liquid inlet pipe 102 to the battery-side liquid inlet end 100a of the vehicle-mounted liquid cooling unit 100 under test, connect the battery-side liquid outlet pipe 103 to the battery-side liquid outlet end 100b of the vehicle-mounted liquid cooling unit 100 under test, connect the electronic control-side liquid inlet pipe 202 to the electronic control-side liquid inlet end 100c of the vehicle-mounted liquid cooling unit 100 under test, and connect the electronic control-side liquid outlet pipe 203 to the electronic control-side liquid outlet end 100d of the vehicle-mounted liquid cooling unit 100 under test.

[0056] S2. Connect the battery-side liquid inlet pipe 102, the battery-side liquid outlet pipe 103, the electronic control-side liquid inlet pipe 202, and the electronic control-side liquid outlet pipe 203, and start the vehicle-mounted liquid cooling unit 100 under test. Drive the liquid medium in the battery-side circulation channel and the electronic control-side circulation channel respectively through the driving force of the vehicle-mounted liquid cooling unit 100 under test.

[0057] S3. After the tested vehicle-mounted liquid cooling unit 100 reaches a steady state, the battery-side inlet liquid temperature T1 of the tested vehicle-mounted liquid cooling unit 100 is detected by the battery-side water tank temperature sensor 101a, and the battery-side outlet liquid temperature T2 of the tested vehicle-mounted liquid cooling unit 100 is detected by the battery-side outlet liquid temperature sensor 103a; the actual cooling capacity Q1 of the tested vehicle-mounted liquid cooling unit 100 on the battery side is calculated using the following formula:

[0058]

[0059] Where C is the specific heat capacity of the liquid medium, in kJ / (kg·℃), and ρ is the density of the liquid medium, in kg / m³. 3 ΔT1 is (battery-side inlet temperature T1 - battery-side outlet temperature T2), in °C;

[0060] Furthermore, after the tested vehicle-mounted liquid cooling unit 100 reaches a steady state, the inlet liquid temperature T3 of the tested vehicle-mounted liquid cooling unit 100 on the electronic control side is detected by the electronic control side water tank temperature sensor 201a, and the outlet liquid temperature T4 of the tested vehicle-mounted liquid cooling unit 100 on the electronic control side is detected by the electronic control side outlet liquid temperature sensor 203a; the actual cooling capacity Q2 of the tested vehicle-mounted liquid cooling unit 100 on the electronic control side is calculated using the following formula:

[0061]

[0062] Where C is the specific heat capacity of the liquid medium, in kJ / (kg·℃), and ρ is the density of the liquid medium, in kg / m³. 3 ΔT2 is (inlet temperature T3 on the electronically controlled side - outlet temperature T4 on the electronically controlled side), in °C;

[0063] It should be noted that the test vehicle-mounted liquid cooling unit 100 reaches a steady state, specifically the cooling state and liquid cooling medium driving state of the test vehicle-mounted liquid cooling unit 100 (which can be obtained by feedback from the battery-side liquid inlet flow meter 102a and the electronic control-side liquid inlet flow meter 202a) reach a steady state.

[0064] S4. Open the air injection and drainage channel to inject compressed air into the battery-side liquid inlet pipe 102, thereby pushing the liquid cooling medium in the battery-side liquid inlet pipe 102, the battery side of the vehicle-mounted liquid cooling unit 100 under test, and the battery-side liquid outlet pipe 103 back to the battery-side water storage tank 101; and inject compressed air into the electronic control side liquid inlet pipe 202, thereby pushing the liquid cooling medium in the electronic control side liquid inlet pipe 202, the electronic control side of the vehicle-mounted liquid cooling unit 100 under test, and the electronic control side liquid outlet pipe 203 back to the electronic control side water storage tank 201;

[0065] S5. After the liquid cooling medium in the battery-side liquid inlet pipe 102, the battery-side and electronic control-side liquid inlet pipes 202 of the vehicle-mounted liquid cooling unit 100 under test, and the electronic control side of the vehicle-mounted liquid cooling unit 100 under test is emptied, close the battery-side liquid inlet pipe 102, the battery-side liquid outlet pipe 103, the electronic control-side liquid inlet pipe 202, the electronic control-side liquid outlet pipe 203, and the air injection and liquid drainage channels to end the test.

[0066] More specifically, in step S2, when the battery-side liquid inlet pipe 102, battery-side liquid outlet pipe 103, electronic control-side liquid inlet pipe 202, and electronic control-side liquid outlet pipe 203 are connected, the battery-side liquid inlet controllable valve 102b, battery-side liquid outlet controllable valve 103b, electronic control-side liquid inlet controllable valve 202b, and electronic control-side liquid outlet controllable valve 203b are all switched to the connected state; in step S5, when the battery-side liquid inlet pipe 102, battery-side liquid outlet pipe 103, electronic control-side liquid inlet pipe 202, and electronic control-side liquid outlet pipe 203 are closed, the battery-side liquid inlet controllable valve 102b, battery-side liquid outlet controllable valve 103b, electronic control-side liquid inlet controllable valve 202b, and electronic control-side liquid outlet controllable valve 203b are all switched to the closed state.

[0067] More specifically, in step S2, when the gas injection and drainage channel is opened, both the battery-side gas injection controllable valve 302a and the electronically controlled gas injection controllable valve 303a are switched to the open state; in step S5, when the gas injection and drainage channel is closed, both the battery-side gas injection controllable valve 302a and the electronically controlled gas injection controllable valve 303a are switched to the closed state.

[0068] After the liquid cooling medium in the battery-side liquid inlet pipe 102, the battery-side and electronic control-side liquid inlet pipes 202 of the vehicle-mounted liquid cooling unit 100 under test, and the electronic control side of the vehicle-mounted liquid cooling unit 100 under test is drained, the pipe connection of the vehicle-mounted liquid cooling unit 100 under test can be disconnected (other nodes of the liquid cooling unit cooling capacity testing fixture do not need to be disconnected), thereby removing the vehicle-mounted liquid cooling unit 100 under test and replacing it with the next vehicle-mounted liquid cooling unit 100 under test. The above process does not cause any liquid medium to overflow, ensuring the cleanliness and safety of the testing site.

[0069] The vehicle-mounted liquid cooling unit test fixture and test method of this embodiment detect the battery-side inlet liquid temperature T1 of the vehicle-mounted liquid cooling unit 100 under test using the battery-side water tank temperature sensor 101a, and the battery-side outlet liquid temperature T2 of the vehicle-mounted liquid cooling unit 100 under test using the battery-side water tank temperature sensor 103a. The actual cooling capacity Q1 of the vehicle-mounted liquid cooling unit 100 under test on the battery side can be obtained by calculation. The electronic control side inlet liquid temperature of the vehicle-mounted liquid cooling unit 100 under test is detected by the electronic control side water tank temperature sensor 201a. Temperature T3 is measured by the liquid outlet temperature sensor 203a on the electronic control side of the vehicle-mounted liquid cooling unit 100 under test. The actual cooling capacity Q2 of the vehicle-mounted liquid cooling unit 100 under test can be obtained by calculation. The vehicle-mounted liquid cooling unit test fixture and test method of this embodiment have the characteristics of being fast, efficient and highly integrated. They solve the problems of long test time, high capital investment and difficulty in adapting to rapid test for vehicle-mounted liquid cooling units. They can also improve the cleanliness and safety of the test environment.

[0070] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A testing fixture for vehicle-mounted liquid-cooled chiller units, used for testing vehicle-mounted liquid-cooled chiller units under test; characterized in that, This includes the battery-side circulation channel, the electronic control-side circulation channel, and the gas injection and liquid drainage channel; The battery-side circulation channel includes a battery-side water tank, a battery-side liquid inlet pipe, and a battery-side liquid outlet pipe. A battery-side water tank temperature sensor is installed at the battery-side water tank to detect the temperature of the liquid cooling medium in the battery-side water tank. The battery-side liquid inlet pipe is led out from the battery-side water tank and connected to the battery-side liquid inlet end of the vehicle-mounted liquid cooling unit under test. A battery-side liquid inlet flow meter is installed at the battery-side liquid inlet pipe to detect the flow rate of the liquid cooling medium flowing through the battery-side liquid inlet pipe. The battery-side liquid outlet pipe is led out from the battery-side water tank and connected to the battery-side liquid outlet end of the tested vehicle-mounted liquid cooling unit. In addition, a battery-side liquid outlet temperature sensor is provided at the battery-side liquid outlet pipe to detect the temperature of the liquid cooling medium flowing through the battery-side liquid outlet pipe. The electrically controlled circulating channel includes an electrically controlled water storage tank, an electrically controlled liquid inlet pipe, and an electrically controlled liquid outlet pipe. A temperature sensor for the water storage tank on the electric control side is installed at the water storage tank on the electric control side to detect the temperature of the liquid cooling medium in the water storage tank on the electric control side. The liquid inlet pipe on the electronic control side is led out from the water storage tank on the electronic control side and connected to the liquid inlet end of the vehicle-mounted liquid cooling unit under test. Furthermore, an electronic control side liquid inlet flow meter is installed at the liquid inlet pipe on the electronic control side to detect the flow rate of the liquid cooling medium flowing through the liquid inlet pipe on the electronic control side. The liquid outlet pipe on the electronic control side is led out from the water storage tank on the electronic control side and connected to the liquid outlet end of the vehicle-mounted liquid cooling unit under test. Furthermore, an electronic control side liquid outlet temperature sensor is installed at the liquid outlet pipe on the electronic control side to detect the temperature of the liquid cooling medium flowing through the liquid outlet pipe on the electronic control side. The air injection and drainage channel is connected to the battery-side liquid inlet pipe of the battery-side circulation channel to inject compressed air into the battery-side liquid inlet pipe, thereby pushing the liquid cooling medium in the battery-side liquid inlet pipe, the battery side of the tested vehicle-mounted liquid cooling unit, and the battery-side liquid outlet pipe back to the battery-side water tank; and the air injection and drainage channel is also connected to the electronic control side liquid inlet pipe of the electronic control side circulation channel to inject compressed air into the electronic control side liquid inlet pipe, thereby pushing the liquid cooling medium in the electronic control side liquid inlet pipe, the electronic control side of the tested vehicle-mounted liquid cooling unit, and the electronic control side liquid outlet pipe back to the electronic control side water tank.

2. The vehicle-mounted liquid cooling unit test fixture according to claim 1, characterized in that, A controllable liquid inlet valve for the battery side is provided at the liquid inlet pipe on the battery side. A controllable valve for battery-side liquid discharge is installed at the liquid discharge pipe on the battery side.

3. The vehicle-mounted liquid cooling unit test fixture according to claim 2, characterized in that, A battery-side drain branch pipe is connected in parallel to the battery-side liquid outlet pipe. A battery-side drain check valve is installed at the battery-side drain branch pipe.

4. The vehicle-mounted liquid-cooled unit test fixture according to any one of claims 1-3, characterized in that, An electronically controlled liquid inlet valve is installed at the liquid inlet pipe on the electronically controlled side. An electrically controlled liquid outlet controllable valve is installed at the liquid outlet pipe on the electrically controlled side.

5. The vehicle-mounted liquid cooling unit test fixture according to claim 4, characterized in that, An electrical control side drain branch pipe is connected in parallel to the liquid outlet pipe on the electrical control side. An electrically controlled side drain check valve is installed at the drain branch pipe on the electrically controlled side.

6. The vehicle-mounted liquid-cooled unit testing fixture according to claim 1, characterized in that, The gas injection and liquid discharge channel includes a compressed air source, a battery-side gas injection and liquid discharge pipe, and an electronic control-side gas injection and liquid discharge pipe. The compressed air source is connected to the battery-side liquid inlet pipe of the battery-side circulation channel through the battery-side air injection and liquid discharge pipe, and a battery-side air injection controllable valve is provided at the battery-side air injection and liquid discharge pipe. The compressed air source is connected to the electrically controlled liquid inlet pipe of the electrically controlled circulating channel through the electrically controlled air injection and liquid discharge pipe, and an electrically controlled air injection controllable valve is provided at the electrically controlled air injection and liquid discharge pipe.

7. The vehicle-mounted liquid cooling unit test fixture according to claim 1, characterized in that, The electronically controlled side water tank of the electronically controlled side circulation channel and the battery side water tank of the battery side circulation channel are connected to each other through a replenishment pump to pump the liquid cooling medium in the electronically controlled side water tank to the battery side water tank. The battery-side water tank of the battery-side circulation channel is located at a high position, and the electronically controlled water tank of the electronically controlled circulation channel is located at a low position. The battery-side water tank of the battery-side circulation channel and the electronically controlled water tank of the electronically controlled circulation channel are connected to each other through a liquid replenishment controllable valve. When the liquid replenishment controllable valve is opened, the liquid cooling medium in the battery-side water tank can flow to the electronically controlled water tank under the action of gravity. At least one of the water tanks in the electronically controlled circulating channel and the battery-side circulating channel is connected to a replenishment pipe.

8. A test method for a vehicle-mounted liquid-cooled unit, employing the vehicle-mounted liquid-cooled unit test fixture described in any one of claims 1-7; characterized in that, The method includes: S1. Connect the battery-side liquid inlet pipe to the battery-side liquid inlet of the vehicle-mounted liquid cooler under test, connect the battery-side liquid outlet pipe to the battery-side liquid outlet of the vehicle-mounted liquid cooler under test, connect the electronic control-side liquid inlet pipe to the electronic control-side liquid inlet of the vehicle-mounted liquid cooler under test, and connect the electronic control-side liquid outlet pipe to the electronic control-side liquid outlet of the vehicle-mounted liquid cooler under test. S2. Connect the battery-side liquid inlet pipe, the battery-side liquid outlet pipe, the electronic control-side liquid inlet pipe, and the electronic control-side liquid outlet pipe, and start the vehicle-mounted liquid cooling unit under test, so that the liquid cooling medium is driven to circulate in the battery-side circulation channel and the electronic control-side circulation channel respectively by the driving force of the vehicle-mounted liquid cooling unit under test. S3. After the tested vehicle-mounted liquid cooling unit reaches a steady state, the battery-side inlet liquid temperature T1 of the tested vehicle-mounted liquid cooling unit is detected by the battery-side water tank temperature sensor, and the battery-side outlet liquid temperature T2 of the tested vehicle-mounted liquid cooling unit is detected by the battery-side outlet liquid temperature sensor; the actual cooling capacity Q1 of the tested vehicle-mounted liquid cooling unit on the battery side is calculated using the following formula: Where C is the specific heat capacity of the liquid cooling medium, in kJ / (kg·℃), and ρ is the density of the liquid cooling medium, in kg / m³. 3 ΔT1 is (battery-side inlet temperature T1 - battery-side outlet temperature T2), in °C; Furthermore, after the tested vehicle-mounted liquid cooling unit reaches a steady state, the inlet liquid temperature T3 on the electronic control side of the tested vehicle-mounted liquid cooling unit is detected by the temperature sensor of the water tank on the electronic control side, and the outlet liquid temperature T4 on the electronic control side of the tested vehicle-mounted liquid cooling unit is detected by the temperature sensor of the outlet liquid temperature on the electronic control side; the actual cooling capacity Q2 on the electronic control side of the tested vehicle-mounted liquid cooling unit is calculated using the following formula: Where C is the specific heat capacity of the liquid cooling medium, in kJ / (kg·℃), and ρ is the density of the liquid cooling medium, in kg / m³. 3 ΔT2 is (inlet temperature T3 on the electronically controlled side - outlet temperature T4 on the electronically controlled side), in °C; S4. Open the air injection and drainage channel to inject compressed air into the battery-side liquid inlet pipe, thereby pushing the liquid cooling medium in the battery-side liquid inlet pipe, the battery side of the tested vehicle-mounted liquid cooling unit, and the battery-side liquid outlet pipe back to the battery-side water tank; and inject compressed air into the electronic control side liquid inlet pipe, thereby pushing the liquid cooling medium in the electronic control side liquid inlet pipe, the electronic control side of the tested vehicle-mounted liquid cooling unit, and the electronic control side liquid outlet pipe back to the electronic control side water tank; S5. After the liquid cooling medium in the battery-side liquid inlet pipe, the battery side of the vehicle-mounted liquid cooler unit under test, the electronic control side liquid inlet pipe, and the electronic control side of the vehicle-mounted liquid cooler unit under test are emptied, close the battery-side liquid inlet pipe, the battery-side liquid outlet pipe, the electronic control side liquid inlet pipe, the electronic control side liquid outlet pipe, and the gas injection and drainage channel to end the test.

9. The test method for vehicle-mounted liquid-cooled units according to claim 8, characterized in that, A battery-side liquid inlet controllable valve is provided at the battery-side liquid inlet pipe, a battery-side liquid outlet controllable valve is provided at the battery-side liquid outlet pipe, an electronically controlled liquid inlet controllable valve is provided at the electronically controlled liquid inlet pipe, and an electronically controlled liquid outlet controllable valve is provided at the electronically controlled liquid outlet pipe. In step S2, when the battery-side liquid inlet pipe, the battery-side liquid outlet pipe, the electronic control-side liquid inlet pipe, and the electronic control-side liquid outlet pipe are connected, the battery-side liquid inlet controllable valve, the battery-side liquid outlet controllable valve, the electronic control-side liquid inlet controllable valve, and the electronic control-side liquid outlet controllable valve are all switched to the connected state; In step S5, when the battery-side liquid inlet pipe, the battery-side liquid outlet pipe, the electronic control-side liquid inlet pipe, and the electronic control-side liquid outlet pipe are closed, the battery-side liquid inlet controllable valve, the battery-side liquid outlet controllable valve, the electronic control-side liquid inlet controllable valve, and the electronic control-side liquid outlet controllable valve are all switched to the closed state.

10. The test method for vehicle-mounted liquid-cooled units according to claim 8 or 9, characterized in that, The gas injection and liquid discharge channel includes a compressed air source, a battery-side gas injection and liquid discharge pipe, and an electronic control-side gas injection and liquid discharge pipe. The compressed air source is connected to the battery-side liquid inlet pipe of the battery-side circulation channel through the battery-side air injection and liquid discharge pipe, and a battery-side air injection controllable valve is provided at the battery-side air injection and liquid discharge pipe. The compressed air source is connected to the electrically controlled liquid inlet pipe of the electrically controlled circulating channel through the electrically controlled air injection and liquid discharge pipe, and an electrically controlled air injection controllable valve is provided at the electrically controlled air injection and liquid discharge pipe. In step S2, when the gas injection and liquid discharge channel is opened, both the battery-side gas injection controllable valve and the electronically controlled gas injection controllable valve are switched to the open state; In step S5, when the gas injection and drainage channel is closed, both the battery-side gas injection controllable valve and the electronically controlled gas injection controllable valve are switched to the closed state.

Images