Testing device and testing method for simulating energy storage liquid cooling system

Abstract

The invention discloses a testing device and a testing method for simulating an energy storage liquid cooling system. The testing device comprises a controller, a main pipeline, a control system and a plurality of pipeline branches, a main liquid storage tank and a pump body are sequentially arranged in the liquid conveying direction of the main pipeline, all pipeline branches are connected with the main pipeline in parallel, and each pipeline branch is sequentially provided with a first pressure sensor, an electric ball valve, a flow sensor, a second pressure sensor and a secondary liquid storage tank in the liquid conveying direction. The controller is electrically connected with the pump body and the electric ball valves, and the controller is in signal transmission connection with the control system, the first pressure sensors, the second pressure sensors and the flow sensors. According to the scheme, the flow of the cooling liquid of the liquid cooling system is accurately regulated and controlled, and the problem of poor heat dissipation caused by improper liquid flow and pressure control during operation of the liquid cooling system in the actual energy storage equipment is effectively avoided, so that the reliability and the heat dissipation effect of the liquid cooling system during actual operation are improved.

Description

Technical Field

[0001] This invention relates to the technical field of energy storage technology, and in particular to a test device and test method for simulating an energy storage liquid cooling system. Background Technology

[0002] Large-scale energy storage systems contain numerous battery modules, generating significant heat during operation. Existing liquid cooling systems in energy storage devices face several technical challenges in practical applications. These issues not only affect the device's heat dissipation performance but also pose potential risks to the safety and lifespan of the energy storage units. Firstly, without evaluation and verification data supporting key parameters such as coolant flow rate and pressure, precise control of the coolant flow and pressure during operation is difficult. This can lead to poor heat dissipation in some energy storage units, causing temperature increases and potentially resulting in localized overheating. Furthermore, excessively high temperatures can trigger uncontrolled chemical reactions within the batteries, even leading to thermal runaway events, fires, and other safety hazards, posing a significant safety risk to the energy storage device. Moreover, inaccurate control of coolant flow and pressure can prevent efficient heat transfer, resulting in low overall heat dissipation efficiency and affecting the stable operation of the device.

[0003] To address this, a structure is needed that can simulate the actual operating conditions of an energy storage system. By simulating and controlling parameters such as liquid flow rate and temperature, it can be used to evaluate the cooling effect of a liquid cooling system on energy storage devices (such as battery packs). Summary of the Invention

[0004] To overcome the shortcomings of existing technical solutions, embodiments of the present invention provide a test device and test method for simulating an energy storage liquid cooling system.

[0005] The technical solution adopted by this invention to solve its technical problem is: In a first aspect, the present invention provides a test device for simulating an energy storage liquid cooling system, the test device comprising a controller, a main pipeline, a control system, and multiple pipeline branches; A main storage tank and a pump body are sequentially arranged along the direction of liquid delivery of the main pipeline. Each branch of the pipeline is connected in parallel with the main pipeline. A first pressure sensor, an electric ball valve, a flow sensor, a second pressure sensor, and a secondary storage tank are sequentially arranged along the direction of liquid delivery of each branch of the pipeline. The controller is electrically connected to the pump body and each of the electric ball valves to adjust the speed of the pump body and the opening degree of each of the electric ball valves. The controller is also connected to the control system, each of the first pressure sensors, each of the second pressure sensors and each of the flow sensors for signal transmission to transmit pressure and flow values ​​to the control system.

[0006] In a second aspect, the present invention also provides a test method for simulating an energy storage liquid cooling system, the test method being applied to the test apparatus described in the first aspect above, the test method comprising: S1. Control the pump body to deliver liquid to each of the pipeline branches; S2. Control each of the flow sensors to monitor the flow rate of the liquid in the corresponding pipeline branch during flow, so as to obtain the total liquid flow rate value and the liquid flow rate value of each pipeline branch; control each of the pressure sensors to monitor the pressure value of the corresponding pipeline branch; S3. Detect whether the total liquid flow rate meets the preset first flow range value, whether the liquid flow rate of each of the pipeline branches meets the preset second flow range value, and whether the pressure value of each of the pipeline branches meets the preset pressure range value; S4. If the total liquid flow rate does not meet the first flow range value, the pump body is controlled to operate for a preset first adjustment time each time and the pump speed is adjusted; if the liquid flow rate of one of the pipeline branches does not meet the second flow range value and / or the pressure value of the pipeline branch does not meet the pressure range value, the corresponding electric ball valve is controlled to operate for a preset second adjustment time each time and the opening value of the electric ball valve is adjusted. S5. If the total liquid flow rate meets the first flow range value, the liquid flow rate of each of the pipeline branches meets the second flow range value, and / or the pressure value of each of the pipeline branches meets the pressure range value, then the current total liquid flow rate value, the liquid flow rate value of each of the pipeline branches, and the pressure value of each of the pipeline branches are all uploaded to the control system.

[0007] Compared with the prior art, the beneficial effects of the present invention are: The controller uses flow sensors to monitor the flow rate of liquid in each pipeline branch, while simultaneously controlling first and second pressure sensors to monitor the pressure in each branch. This yields the total liquid flow rate, flow rate values ​​for each branch, and pressure values. Based on preset flow and pressure ranges, the controller determines in real-time whether the total coolant flow rate meets requirements. If the total flow rate is insufficient, the pump speed is adjusted for precise control. If branch flow or pressure is abnormal, the opening of the corresponding electric ball valve is adjusted for correction. When all parameters meet requirements, the data is uploaded to the control system for further analysis and optimization. This closed-loop control method achieves precise regulation of the coolant flow in the liquid cooling system, enabling pre-assessment of the actual cooling performance of the energy storage device. This effectively avoids poor heat dissipation caused by improper flow and pressure control during operation of the liquid cooling system in the energy storage device, thereby improving the reliability and heat dissipation effect of the liquid cooling system in actual operation. Attached Figure Description

[0008] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0009] Figure 1 This is a control principle diagram of the test device for the simulated energy storage liquid cooling system according to an embodiment of the present invention.

[0010] Figure 2 This is a control principle diagram of the controller in an embodiment of the present invention.

[0011] Figure 3 This is a flowchart of the testing method for a simulated energy storage liquid cooling system according to an embodiment of the present invention.

[0012] Numbers in the diagram

[0013] 1. Main storage tank; 2. Controller; 3. Pump body; 4. Main pipeline; 4A. Output pipeline; 4B. Return pipeline; 5. Control system; 6. Flow sensor; 7. Electric ball valve; 8. Second pressure sensor; 9. Pipeline branch; 10. Secondary storage tank; 11. First pressure sensor; 12. First vent valve; 13. Second vent valve. Detailed Implementation

[0014] 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, not all, of the embodiments of the present invention. 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.

[0015] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0016] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0017] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0018] In order to solve the technical problems described in the background art, the present invention provides a test device and test method for simulating an energy storage liquid cooling system.

[0019] The following describes in detail the specific structure of a test device for simulating an energy storage liquid cooling system provided by an embodiment of the present invention, according to the appendix. Figure 1-2 As shown, the specific structure of the testing device includes a controller 2, a main pipeline 4, a control system 5, and multiple pipeline branches 9; a main storage tank 1 and a pump body 3 are arranged sequentially along the direction of liquid delivery of the main pipeline 4, and each pipeline branch 9 is connected in parallel with the main pipeline 4. Each pipeline branch 9 is arranged sequentially along the direction of liquid delivery of a first pressure sensor 11, an electric ball valve 7, a flow sensor 6, a second pressure sensor 8, and a secondary storage tank 10.

[0020] Specifically, the main pipeline 4 is the primary channel of the entire liquid cooling system. Liquid flows out from the main storage tank 1, is pressurized by the pump body 3, and then delivered to each branch pipeline. The main storage tank 1 stores coolant, providing a stable liquid supply to the system. The pump body 3 provides power for the liquid flow, and its speed can be adjusted by the controller 2, thereby changing the total liquid flow rate. Pipeline branches 9 are connected in parallel with the main pipeline 4. Each branch pipeline is equipped with a sensor and an electric ball valve 7 for independently monitoring and controlling the liquid flow rate and pressure. A first pressure sensor 11 is installed at the inlet of each branch pipeline to monitor the pressure of the liquid entering the branch pipeline. The electric ball valve 7 is installed after the first pressure sensor 11, and its opening is adjusted by the controller 2 to control the liquid flow rate in the branch pipeline. A flow sensor 6 is installed after the electric ball valve 7 to monitor the liquid flow rate in the branch pipeline in real time. A second pressure sensor 8 is installed after the flow sensor 6 to monitor the pressure of the liquid after it has flowed in the branch pipeline. A secondary storage tank 10 is located at the end of each branch pipeline to collect and store the liquid flowing out of the branch pipeline.

[0021] The controller 2 is electrically connected to the pump body 3 and each electric ball valve 7 to adjust the speed of the pump body 3 and the opening degree of each electric ball valve 7. The controller 2 is also connected to the control system 5, each first pressure sensor 11, each second pressure sensor 8 and each flow sensor 6 for signal transmission to transmit pressure and flow values ​​to the control system 5.

[0022] Specifically, liquid flows from the main storage tank 1, is pressurized by the pump body 3, and then enters the main pipeline 4. The controller 2 monitors the flow rate of each branch pipeline in real time through the flow sensor 6 and calculates the total flow rate. If the total flow rate does not meet the preset range, the controller 2 will adjust the speed of the pump body 3. For example, if the total flow rate is lower than the preset value, the controller 2 will increase the speed of the pump body 3 to increase the flow rate; conversely, if the total flow rate is too high, the controller 2 will decrease the speed of the pump body 3. The flow rate of each branch pipeline is monitored by the flow sensor 6. If the flow rate of a certain branch pipeline is abnormal (e.g., too high or too low), the controller 2 will adjust the opening of the electric ball valve 7 on that branch pipeline. For example, if the flow rate is too high, the opening of the electric ball valve 7 will be reduced; if the flow rate is too low, the opening will be increased, thereby adjusting the flow rate of that branch pipeline to the preset range. Finally, the controller 2 transmits the flow rate, pressure value, and total flow rate of each branch pipeline to the control system 5 in real time. This data includes the flow rate, inlet and outlet pressure of each branch pipeline, and the total flow rate calculated from the data. After receiving this data, the control system 5 performs further analysis, such as evaluating the overall performance of the entire energy storage liquid cooling system, identifying potential fault points, and optimizing the control strategies of the pump body 3 speed and the electric ball valve 7. Based on the analysis results, the control system 5 can adjust the preset flow and pressure ranges, or optimize the control logic of the controller 2, in order to improve the efficiency and reliability of the actual energy storage liquid cooling system during actual operation.

[0023] Therefore, the test device for simulating the liquid cooling system of this scheme can accurately monitor and control the flow rate and pressure of the liquid cooling system, ensuring that the flow of coolant meets the specified requirements, thereby providing a guarantee for the safe and efficient operation of the actual liquid cooling system.

[0024] It is understood that the controller 2 in this embodiment of the invention includes an STM32 chip, a sensor acquisition interface, an analog output interface, a communication interface, etc.; wherein, the sensor acquisition interface is used to acquire data from the pressure sensor; the analog output interface is used to control the opening degree of the electric ball valve 7; the communication interface includes 4 RS485 communication channels, which are used to connect the flow meter and the host computer for data transmission processing, and can also be used for program upgrades.

[0025] In some specific embodiments, the main pipeline 4 includes an output pipeline 4A and a return pipeline 4B. The outlet of the return pipeline 4B is connected to the inlet of the main storage tank 1. The return pipeline 4B is provided with multiple inlets, and each inlet is connected to the outlet of each pipeline branch 9. The inlet of the output pipeline 4A is connected to the outlet of the main storage tank 1, and the multiple outlets of the output pipeline 4A are connected to the inlets of the corresponding pipeline branches 9. The pump body 3 is disposed on the output pipeline 4A.

[0026] Specifically, the main reservoir 1 serves as the storage and supply unit for coolant, and its outlet is connected to the inlet of the output pipeline 4A. A pump 3 is installed in the output pipeline 4A to provide power to the coolant. The speed of the pump 3 is adjusted by the controller 2, thereby controlling the total flow rate of the coolant. The coolant flow path is as follows: the coolant flows out of the main reservoir 1, is pressurized by the pump 3, and then is delivered to the inlets of each branch pipeline 9 through the output pipeline 4A. The controller 2 controls the total flow rate in the output pipeline 4A by adjusting the speed of the pump 3. Flow sensors 6 are installed in each branch pipeline 9 to monitor the flow rate of the branch pipeline in real time and feed the data back to the controller 2. The controller 2 dynamically adjusts the speed of the pump 3 according to a preset flow range to ensure that the total flow rate meets the requirements. The pressure in the output pipeline 4A is mainly generated by the pressurization effect of the pump 3; therefore, a first pressure sensor 11 is installed at the inlet of each branch pipeline 9 to monitor the pressure of the coolant entering the branch pipeline. Controller 2 adjusts the pump speed 3 based on data from the pressure sensor to ensure the pressure in output pipe 4A remains within a preset range. Output pipe 4A has multiple outlets, each connected to the inlet of a branch pipe 9. Each branch pipe 9 has an electric ball valve 7 at its inlet. Controller 2 further distributes the coolant flow in each branch pipe by adjusting the opening of the electric ball valve 7. For example, when the flow rate in a branch pipe is lower than a preset value, controller 2 increases the opening of the electric ball valve 7 on that branch pipe to increase the flow rate; conversely, it decreases the opening.

[0027] For example, the return pipe 4B has multiple inlets, each connected to the outlet of a branch pipe 9. Coolant in each branch pipe 9 flows into the return pipe 4B through these inlets. Each branch pipe 9 has a secondary storage tank 10 at its end for temporarily storing coolant flowing out of the branch pipe. After flowing out of the secondary storage tank 10, the coolant enters the return pipe 4B. Similarly, after flowing out of the secondary storage tanks 10 of each branch pipe 9, the coolant enters the return pipe 4B through its inlet and finally flows into the main storage tank 1. The outlet of the return pipe 4B is connected to the inlet of the main storage tank 1, allowing the coolant to return to the main storage tank 1 via the return pipe 4B, thus achieving coolant circulation.

[0028] Through precise flow and pressure control, efficient recycling of coolant is achieved. Output line 4A is responsible for delivering coolant from the main reservoir 1 to each branch line, while return line 4B is responsible for collecting used coolant and returning it to the main reservoir 1.

[0029] It should be noted that although the main function of the return pipe 4B is to collect and return the coolant, its internal pressure also needs to be monitored. Therefore, the controller 2 monitors the pressure in the return pipe 4B through a pressure sensor to ensure a smooth return process and avoid malfunctions caused by excessively high or low pressure. A flow sensor 6 can also be installed in the return pipe 4B to monitor the flow rate of the return coolant, which helps to evaluate the overall circulation efficiency of the system and detect potential leaks or blockages in a timely manner.

[0030] In some specific embodiments, the testing device further includes a first exhaust valve 12 and a second exhaust valve 13; the first exhaust valve 12 is located at the end of the return pipeline 4B away from the main storage tank 1, and the second exhaust valve 13 is located in the output pipeline 4A.

[0031] Specifically, the first vent valve 12 is installed at the end of the return pipe 4B, that is, at the end furthest from the main reservoir 1. This position is at the highest point of the return pipe 4B, which facilitates the accumulation and discharge of air. It is used to remove air and air bubbles from the return pipe 4B, ensuring the smooth flow of coolant in the return pipe 4B and avoiding flow instability and pressure fluctuations caused by air bubble accumulation. As the coolant flows in the return pipe 4B, air and air bubbles will flow with the coolant. Since the density of air is less than that of coolant, the air and air bubbles will naturally rise and accumulate at the highest point of the return pipe 4B, that is, at the location of the first vent valve 12. The first vent valve 12 in this embodiment of the invention is a vent valve. When air accumulation is detected, the valve will automatically open to discharge the air from the testing device. After venting is completed, the valve will automatically close to prevent coolant loss. The second vent valve 13 is installed in the output pipe 4A, located after the pump body 3 and near the inlet of the pipe branch 9. It is used to remove air and air bubbles from the output pipe 4A, ensuring stable flow of coolant in the output pipe 4A and preventing unstable operation, flow fluctuations, or abnormal pressure caused by air bubble accumulation. When the pump body 3 starts, and coolant is delivered from the main reservoir 1 to each pipe branch 9 through the output pipe 4A, air and air bubbles will flow with the coolant and accumulate at the highest point of the output pipe 4A, i.e., the location of the second vent valve 13. This second vent valve 13 is also an automatic vent valve. When air accumulation is detected, the valve automatically opens to expel the air from the system. After venting is completed, the valve automatically closes to prevent coolant loss.

[0032] This configuration utilizes the first exhaust valve 12 and the second exhaust valve 13 working together in the test device for the energy storage liquid cooling system to ensure smooth flow of coolant throughout the test device and avoid adverse effects caused by air accumulation.

[0033] The following details a specific scheme for a test method for simulating an energy storage liquid cooling system provided by an embodiment of the present invention. The test method is applied to the test apparatus in any of the above embodiments, according to the appendix. Figure 3 As shown, the specific steps of this testing method include the following: S1, control the pump body 3 to transport liquid to each pipeline branch 9.

[0034] S2. Control each flow sensor 6 to monitor the flow rate of the liquid in the corresponding pipeline branch 9 during flow, so as to obtain the total liquid flow rate value and the liquid flow rate value of each pipeline branch 9; control each pressure sensor to monitor the pressure value of the corresponding pipeline branch 9.

[0035] S3. Check whether the total liquid flow rate meets the preset first flow range value, whether the liquid flow rate of each pipeline branch 9 meets the preset second flow range value, and whether the pressure value of each pipeline branch 9 meets the preset pressure range value.

[0036] S4. If the total liquid flow rate does not meet the first flow range value, the pump body 3 is controlled to operate for the preset first adjustment time each time and the speed of the pump body 3 is adjusted. If the liquid flow rate of one of the pipeline branches 9 does not meet the second flow range value and / or the pressure value of its pipeline branch 9 does not meet the pressure range value, the corresponding electric ball valve 7 is controlled to operate for the preset second adjustment time each time and the opening value of the electric ball valve 7 is adjusted.

[0037] S5. If the total liquid flow rate meets the first flow range value, the liquid flow rate of each pipeline branch 9 meets the second flow range value, and / or the pressure value of each pipeline branch 9 meets the pressure range value, then the current total liquid flow rate value, the liquid flow rate value of each pipeline branch 9, and the pressure value of each pipeline branch 9 are all uploaded to the control system 5.

[0038] At the start of the test, controller 2 activates pump 3, delivering coolant from main reservoir 1 through output pipe 4A to each branch pipe 9. The initial speed of pump 3 is set by controller 2 according to a preset total flow range to ensure that coolant can smoothly enter each branch pipe. Flow sensor 6 of each branch pipe 9 monitors the liquid flow rate in real time and transmits the data to controller 2. Controller 2 calculates the total liquid flow rate based on the flow rate values ​​of each branch pipe. The first pressure sensor 11 and the second pressure sensor 8 of each branch pipe 9 monitor the pressure when the liquid enters and exits the branch pipe, respectively. Controller 2 receives this pressure data for subsequent analysis and adjustment.

[0039] Specifically, controller 2 compares the calculated total liquid flow rate with a preset first flow range value. If the total flow rate is not within the preset range, it enters the flow adjustment stage. Controller 2 compares the flow rate of each pipeline branch 9 with a preset second flow range value. If the flow rate of a certain branch pipeline is not within the preset range, it enters the branch adjustment stage. Controller 2 compares the pressure value of each pipeline branch 9 with a preset pressure range value. If the pressure value of a certain branch pipeline is not within the preset range, it enters the branch adjustment stage.

[0040] During the adjustment phase, if the total liquid flow rate does not meet the preset first flow range, controller 2 will adjust the speed of pump 3. Controller 2 will gradually adjust the speed of pump 3 according to the preset first adjustment time. For example, if the total flow rate is lower than the preset range, the speed of pump 3 will be increased; if the total flow rate is higher than the preset range, the speed of pump 3 will be decreased. If the flow rate or pressure value of a certain pipeline branch 9 does not meet the preset range, controller 2 will adjust the opening of the electric ball valve 7 on that branch pipeline. Controller 2 will gradually adjust the opening of electric ball valve 7 according to the preset second adjustment time. If the branch flow rate is lower than the preset range, the opening of electric ball valve 7 will be increased; if the branch flow rate is higher than the preset range, the opening will be decreased. If the branch pressure is lower than the preset range, the opening of electric ball valve 7 will be increased; if the branch pressure is higher than the preset range, the opening will be decreased.

[0041] Finally, when the total liquid flow rate meets the first flow range, the flow rate of each pipeline branch 9 meets the second flow range, and the pressure of each pipeline branch 9 meets the preset pressure range, the controller 2 uploads these data to the control system 5. After receiving these data, the control system 5 can perform further analysis and optimization. Based on the analysis results, the control system 5 can adjust the preset flow and pressure ranges and optimize the control strategy so that it can be applied to the actual energy storage liquid cooling system and ensure the reliability of such energy storage liquid cooling system during operation.

[0042] In some specific embodiments, when controlling the pump body 3 to operate according to a preset first adjustment time and adjusting the speed of the pump body 3 in step S4, the following steps are specifically included: S41. If the total liquid flow rate is greater than the first flow range value, then control the pump body 3 to reduce the speed according to the preset first adjustment value during each first adjustment time.

[0043] S42. If the total liquid flow rate is less than the first flow range value, the pump body 3 is controlled to increase its speed according to the preset second adjustment value during each first adjustment time.

[0044] Specifically, in a liquid cooling system, the rotational speed of pump 3 directly affects the total flow rate of the coolant. To ensure the liquid cooling system operates at its optimal state, the rotational speed of pump 3 needs to be dynamically adjusted based on the real-time monitored total liquid flow rate to conform to a preset first flow range. To ensure the total liquid flow rate is within the preset first flow range, for example, 100L ± 5L / min, the rotational speed of pump 3 is dynamically adjusted based on the real-time monitored flow rate to adapt to changes in the operation of the liquid cooling system. The first flow range is the target range for the total liquid flow rate, for example, 100L ± 5L / min. The first adjustment time is the time interval between each adjustment of the pump 3 rotational speed, for example, 5 seconds per adjustment. The first adjustment value is the amount by which the rotational speed is reduced each time the total liquid flow rate is greater than the first flow range. The second adjustment value is the amount by which the rotational speed is increased each time the total liquid flow rate is less than the first flow range.

[0045] If the total liquid flow rate is greater than the upper limit of the first flow range (e.g., exceeding 110 L / min), or if the total liquid flow rate is less than the lower limit of the first flow range (e.g., below 90 L / min), the controller 2 dynamically adjusts the pump body 3 speed according to the following logic based on the real-time monitoring results.

[0046] When the total liquid flow rate exceeds the upper limit of the first flow range, controller 2 records the current pump speed of pump 3. Within each first adjustment time (e.g., 5 seconds), controller 2 reduces the pump speed of pump 3 according to a preset first adjustment value. The first adjustment value is a speed change, such as a 5% reduction each time. After adjustment, controller 2 continues to monitor the total liquid flow rate until the flow rate falls within the first flow range. For example, if the current total liquid flow rate is 115 L / min, the preset first flow range is 100 L ± 5 L / min, and the first adjustment value is a 5% reduction each time, operating for 5 seconds while simultaneously reducing the pump speed of pump 3 by 5%, until the total liquid flow rate falls below 110 L / min. When the total liquid flow rate is less than the lower limit of the first flow range, controller 2 records the current pump speed of pump 3. Within each first adjustment time (e.g., 5 seconds), controller 2 increases the pump speed of pump 3 according to a preset second adjustment value. The second adjustment value is a fixed speed change, such as a 5% increase each time. After adjustment, controller 2 continues to monitor the total liquid flow rate until the flow rate rises within the first flow range. For example, the current total liquid flow rate is 85L / min, the preset first flow range is 100L±5L / min, and the second adjustment value is to increase by 5% each time, and to operate for 5 seconds each time while simultaneously increasing the speed of pump body 3 by 5% until the total liquid flow rate rises to above 90L / min.

[0047] Throughout the adjustment process, controller 2 continuously receives real-time data from flow sensor 6 and dynamically adjusts the speed of pump body 3 based on this data, ensuring that the testing device can quickly respond to changes in flow rate and keep the total liquid flow rate within the preset range.

[0048] It should be noted that the rotational speed range of the pump body 3 in this embodiment of the invention is 1%–100%. For example, when the rotational speed range of the pump body 3 is 100%, its rotational speed can reach 3000 rpm. The adjustment range each time is within the range of 5%–10%, and the most preferred adjustment range for the pump body 3 is 5%. A 5% adjustment range can effectively avoid over-adjustment of the flow rate due to excessive adjustment. For example, if the adjustment range is large each time (such as 10% or higher), the flow rate will fluctuate frequently within the target range and will be difficult to stabilize within the preset range. A 5% adjustment range can more smoothly adjust the flow rate to the target range, and the 5% adjustment range makes the change in the rotational speed of the pump body 3 smoother.

[0049] The speed parameter range of the pump body 3 in the following embodiment is 5% as an example: During the initial startup of the liquid cooling system, the pump body 3 operates at 50% speed, reaching 1500 rpm for one minute, providing a stable initial operating state for the test device. At this time, the coolant begins to circulate in the system, and the components gradually enter their working state, avoiding system shock caused by sudden high-load operation. The initial speed of 50% for pump body 3 is a suitable initial value, enabling the establishment of a relatively stable flow rate in a short time, providing basic data for subsequent flow monitoring and adjustment. Controller 2 sets the initial speed of pump body 3 to 50%, and pump body 3 operates at 50% speed for one minute. During this time, the coolant circulates in the system, and various sensors (such as flow sensor 6 and pressure sensor) begin monitoring data, simultaneously collecting initial flow and pressure data to provide a reference for subsequent automatic adjustment. If the total liquid flow rate exceeds the preset first flow range value (e.g., the upper flow limit), controller 2 reduces the speed of pump body 3 by 5% each time, that is, reducing the speed of pump body 3 to 1350 rpm until the flow rate drops to the target range. If the total liquid flow rate is less than the preset first flow range (e.g., the lower limit of flow), the controller 2 will increase the speed of the pump body 3 by 5% each time until the flow rate reaches the target range. By adjusting the speed by 5% each time, that is, increasing the speed of the pump body 3 to 1650 rpm, the adjustment process can be ensured to be smooth, avoiding drastic fluctuations in flow and pressure caused by excessive adjustment.

[0050] It should also be noted that operators can manually adjust the speed of pump body 3 to observe the performance of the test device under different operating conditions and ensure that the total liquid flow rate meets the requirements.

[0051] In some specific embodiments, if the liquid flow rate of one of the pipeline branches 9 does not meet the second flow range value and / or the pressure value of the pipeline branch 9 does not meet the pressure range value in step S4, then the corresponding electric ball valve 7 is controlled to operate according to the preset second adjustment time and the opening value of the electric ball valve 7 is adjusted. Specifically, the following steps are included: S43. If the liquid flow rate of one of the pipeline branches 9 is greater than the second flow range value and / or the pressure value of the pipeline branch 9 is greater than the pressure range value, then control the corresponding electric ball valve 7 to reduce the opening value according to the preset third adjustment value in each second adjustment time.

[0052] S44. If the liquid flow rate of one of the pipeline branches 9 is less than the second flow range value and / or the pressure value of the pipeline branch 9 is less than the pressure range value, then control the corresponding electric ball valve 7 to increase the opening value according to the preset fourth adjustment value in each second adjustment time.

[0053] Specifically, in the testing apparatus for the liquid cooling system, the flow rate and pressure of each pipeline branch 9 need to be strictly controlled to ensure the overall stability and efficiency of the testing apparatus. To this end, dynamically adjusting the opening of the electric ball valve 7 ensures that the liquid flow rate of each pipeline branch 9 conforms to a preset second flow range value, and also ensures that the pressure value of each pipeline branch 9 conforms to a preset pressure range value. Specifically, before adjusting the opening of the electric ball valve 7, the target range for the liquid flow rate of each pipeline branch 9 is defined, for example, 5±1 L / min; the target range for the pressure of each pipeline branch 9 is defined, for example, 0.5±0.1 MPa; the adjustment time for each adjustment of the electric ball valve 7 opening is defined, for example, 8 seconds; and the percentage change in the opening of the electric ball valve 7 is defined, for example, 5% of the opening. Subsequently, the controller 2 monitors the liquid flow rate and pressure value of each pipeline branch 9 in real time through the flow sensor 6 and pressure sensor, and compares them with the preset range values. For example, if the liquid flow rate of a certain pipeline branch 9 exceeds the upper limit of the second flow range value, and / or its pressure value exceeds the pressure range value, the controller will detect the excess liquid flow rate. If the liquid flow rate of a certain pipeline branch 9 is less than the lower limit of the second flow range value, and / or its pressure value is less than the lower limit of the pressure range value, the controller 2 dynamically adjusts the opening of the corresponding electric ball valve 7 based on the real-time monitoring results. If the liquid flow rate of a certain pipeline branch 9 is greater than the upper limit of the second flow range value, and / or its pressure value is greater than the upper limit of the pressure range value, the controller 2 records the current opening of the electric ball valve 7 corresponding to the pipeline branch 9. Within each second adjustment time (e.g., 8 seconds), the controller 2 reduces the opening of the electric ball valve 7 by a preset 5%. After adjustment, the controller 2 continues to monitor the flow rate and pressure value of the pipeline branch 9 until both the flow rate and pressure drop to the preset range.

[0054] For example, if the current liquid flow rate of a certain pipeline branch 9 is 6L / min, and the preset second flow range is 5L±1L / min, the controller 2 will control the electric ball valve 7 to decrease its opening by 5% each time, that is, every 8 seconds, the controller 2 will decrease the opening of the electric ball valve 7 corresponding to the pipeline branch 9 by 5% until the flow rate drops below 6L / min; conversely, if the liquid flow rate of a certain pipeline branch 9 is 3L / min, and the preset second flow range is 5L±1L / min, the controller 2 will control the electric ball valve 7 to increase its opening by 5% each time, that is, every 8 seconds, the controller 2 will increase the opening of the electric ball valve 7 corresponding to the pipeline branch 9 by 5% until the flow rate rises to above 4L / min.

[0055] It should be noted that operators can manually adjust the opening of the electric ball valve 7 to observe the performance of the testing device under different operating conditions, ensuring that the flow and pressure of each pipeline branch 9 meet the requirements.

[0056] In some specific embodiments, in step S2, each flow sensor 6 is controlled to monitor the liquid flow rate in the corresponding pipeline branch 9 to obtain the total liquid flow rate value and the liquid flow rate value of each pipeline branch 9; after controlling each pressure sensor to monitor the pressure value of each pipeline branch 9, the following steps are also included: S21. Detect whether the total liquid flow rate is lower than the preset critical lower limit flow rate.

[0057] S22. If the total liquid flow rate is lower than the preset critical lower limit flow rate, the control test device will stop operating.

[0058] S23. If the total liquid flow rate is higher than the preset critical lower limit flow rate, the following steps are performed: checking whether the total liquid flow rate meets the preset first flow range, whether the liquid flow rate of each pipeline branch 9 meets the preset second flow range, and whether the pressure value of each pipeline branch 9 meets the preset pressure range.

[0059] Specifically, the critical lower limit flow rate is a preset safety threshold used to ensure that the coolant flow rate in the liquid cooling system does not become too low. This critical lower limit flow rate is lower than the first flow range value during normal operation. For example, if the first flow range value is set to 100L ± 5L / min, the critical lower limit flow rate can be set to 80L / min. This critical lower limit flow rate setting is based on the minimum safe operating requirements of the system, ensuring that the coolant flow rate can be maintained at a safe level even under extreme conditions. The flow sensor 6 of each pipeline branch 9 monitors the liquid flow rate in the branch in real time and transmits the data to the controller 2. The controller 2 calculates the total liquid flow rate value based on the flow rate value of each branch pipeline. The controller 2 compares the calculated total liquid flow rate value with the preset critical lower limit flow rate value. If the total liquid flow rate value is lower than the preset critical lower limit flow rate value (e.g., lower than 80L / min), a safety mechanism is triggered. That is, the controller 2 issues a command to stop the operation of the entire liquid cooling system, including shutting down the pump body 3, closing the electric ball valve 7, and other key components, to prevent insufficient heat dissipation or other potential safety problems caused by excessively low flow rate, and to protect the system from damage. If the total liquid flow rate is higher than the critical lower limit flow rate (e.g., higher than 80 L / min), then continue with subsequent flow rate and pressure range testing.

[0060] This detection mechanism ensures that the liquid cooling system can dynamically monitor the flow rate during operation, promptly detect and address potential flow anomalies, and ensure the safety of the system during operation.

[0061] In some specific embodiments, step S2 involves controlling each flow sensor 6 to monitor the liquid flow rate in the corresponding pipeline branch 9 to obtain the total liquid flow rate value and the liquid flow rate value of each pipeline branch 9; after controlling each pressure sensor to monitor the pressure value of each pipeline branch 9, the following steps are also included: S23. Check whether the pressure value of each pipeline branch 9 is higher than the preset critical upper limit pressure value.

[0062] S24. If the pressure value of each pipeline branch 9 is higher than the preset critical upper limit pressure value, the control test device will stop operating.

[0063] S25. If the pressure value of each pipeline branch 9 is lower than the preset critical upper limit pressure value, the following steps are performed: check whether the total liquid flow rate meets the preset first flow range value, whether the liquid flow rate value of each pipeline branch 9 meets the preset second flow range value, and whether the pressure value of each pipeline branch 9 meets the preset pressure range value.

[0064] Specifically, the critical upper limit pressure value is a preset safety threshold used to ensure that the coolant pressure in the liquid cooling system does not become excessively high. This critical upper limit pressure value is higher than the upper limit of the pressure range during normal operation, which is set at 0.2 ± 0.1 MPa. The setting of this critical upper limit pressure value is based on the system's highest safety operating requirements, ensuring that even under extreme conditions, the coolant pressure can be maintained at a safe level, avoiding leaks, damage, or other safety issues caused by excessive pressure. The first pressure sensor 11 and the second pressure sensor 8 of each pipe branch 9 monitor the liquid pressure in that branch in real time and transmit the data to the controller 2. The controller 2 receives the pressure data from each branch pipe for subsequent analysis and judgment. That is, the controller 2 compares the pressure value of each pipe branch 9 with the preset critical upper limit pressure value. If the pressure value of any pipe branch 9 is higher than the preset critical upper limit pressure value (e.g., the critical upper limit pressure value is set to 0.4 MPa), a safety mechanism is triggered. If the pressure values ​​of all pipe branches 9 are lower than the critical upper limit pressure value (e.g., all are lower than 0.4 MPa), subsequent flow and pressure range detection continues.

[0065] If the pressure value of any branch pipe 9 exceeds the preset critical upper limit pressure value, the system will take emergency measures. For example, the controller 2 will issue a command to stop the operation of the entire liquid cooling system, including shutting down key components such as the pump body 3 and the electric ball valve 7, to prevent leakage, damage, or other potential safety problems caused by excessive pressure, and to protect the entire test device from damage. For example, when the pressure value of a branch pipe rises to 0.45MPa (higher than the preset critical upper limit pressure value of 0.4MPa), the controller 2 will immediately trigger the stop mechanism, the pump body 3 will stop operating, the electric ball valve 7 will close, and the system will enter a safe shutdown state. At the same time, the controller 2 will issue an alarm signal to remind the operator that the system has stopped operating due to excessive pressure. The controller 2 will record the current pressure value, flow rate value, and other relevant operating parameters to facilitate subsequent analysis of the cause of the failure.

[0066] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A test device for simulating an energy storage liquid cooling system, characterized in that, The testing device includes a controller, a main pipeline, a control system, and multiple pipeline branches; A main storage tank and a pump body are sequentially arranged along the direction of liquid delivery of the main pipeline. Each branch of the pipeline is connected in parallel with the main pipeline. A first pressure sensor, an electric ball valve, a flow sensor, a second pressure sensor, and a secondary storage tank are sequentially arranged along the direction of liquid delivery of each branch of the pipeline. The controller is electrically connected to the pump body and each of the electric ball valves to adjust the speed of the pump body and the opening degree of each of the electric ball valves. The controller is also connected to the control system, each of the first pressure sensors, each of the second pressure sensors and each of the flow sensors for signal transmission to transmit pressure and flow values ​​to the control system.

2. The test apparatus for simulating an energy storage liquid cooling system according to claim 1, characterized in that, The main pipeline includes an output pipeline and a return pipeline. The outlet of the return pipeline is connected to the inlet of the main storage tank. The return pipeline is provided with multiple inlets, and each inlet is connected to the outlet of each branch of the pipeline. The inlet of the output pipeline is connected to the outlet of the main storage tank, and the multiple outlets of the output pipeline are connected to the inlets of the corresponding branches of the pipeline. The pump body is installed in the output pipeline.

3. The test apparatus for simulating an energy storage liquid cooling system according to claim 2, characterized in that, The testing device further includes a first vent valve and a second vent valve; the first vent valve is located at the end of the return pipeline away from the main storage tank, and the second vent valve is located in the output pipeline.

4. A test method for simulating an energy storage liquid cooling system, wherein the test method is applied to the test apparatus described in any one of claims 1-3, characterized in that, The testing method includes: S1. Control the pump body to deliver liquid to each of the pipeline branches; S2. Control each of the flow sensors to monitor the flow rate of the liquid in the corresponding pipeline branch during flow, so as to obtain the total liquid flow rate value and the liquid flow rate value of each pipeline branch; control each of the pressure sensors to monitor the pressure value of the corresponding pipeline branch; S3. Detect whether the total liquid flow rate meets the preset first flow range value, whether the liquid flow rate of each of the pipeline branches meets the preset second flow range value, and whether the pressure value of each of the pipeline branches meets the preset pressure range value; S4. If the total liquid flow rate does not meet the first flow range value, the pump body is controlled to operate for a preset first adjustment time each time and the pump speed is adjusted; if the liquid flow rate of one of the pipeline branches does not meet the second flow range value and / or the pressure value of the pipeline branch does not meet the pressure range value, the corresponding electric ball valve is controlled to operate for a preset second adjustment time each time and the opening value of the electric ball valve is adjusted. S5. If the total liquid flow rate meets the first flow range value, the liquid flow rate of each of the pipeline branches meets the second flow range value, and / or the pressure value of each of the pipeline branches meets the pressure range value, then the current total liquid flow rate value, the liquid flow rate value of each of the pipeline branches, and the pressure value of each of the pipeline branches are all uploaded to the control system.

5. The test method for the simulated energy storage liquid cooling system according to claim 4, characterized in that, Step S4, which controls the pump body to operate according to a preset first adjustment time and adjusts the pump body speed, specifically includes the following steps: S41. If the total liquid flow rate is greater than the first flow range value, the pump body is controlled to reduce its speed according to the preset first adjustment value during each first adjustment time. S42. If the total liquid flow rate is less than the first flow range value, the pump body is controlled to increase its rotation speed according to the preset second adjustment value during each first adjustment time.

6. The test method for the simulated energy storage liquid cooling system according to claim 4, characterized in that, In step S4, if the liquid flow rate of one of the pipeline branches does not meet the second flow range value and / or the pressure value of the pipeline branch does not meet the pressure range value, then the corresponding electric ball valve is controlled to operate for a preset second adjustment time and the opening value of the electric ball valve is adjusted. Specifically, the steps are as follows: S43. If the liquid flow rate of one of the pipeline branches is greater than the second flow range value and / or the pressure value of the pipeline branch is greater than the pressure range value, then control the corresponding electric ball valve to reduce the opening value according to the preset third adjustment value in each second adjustment time. S44. If the liquid flow rate of one of the pipeline branches is less than the second flow range value and / or the pressure value of the pipeline branch is less than the pressure range value, then control the corresponding electric ball valve to increase the opening value according to the preset fourth adjustment value in each second adjustment time.

7. The test method for the simulated energy storage liquid cooling system according to claim 4, characterized in that, In step S2, each flow sensor is controlled to monitor the liquid flow rate in the corresponding pipeline branch to obtain the total liquid flow rate value and the liquid flow rate value of each pipeline branch; after controlling each pressure sensor to monitor the pressure value of each pipeline branch, the following steps are also included: S21. Detect whether the total liquid flow rate is lower than the preset critical lower limit flow rate; S22. If the total liquid flow rate is lower than the preset critical lower limit flow rate, the test device shall be controlled to stop operating. S23. If the total liquid flow rate is higher than the preset critical lower limit flow rate, the following steps are performed: detecting whether the total liquid flow rate meets the preset first flow range, whether the liquid flow rate of each pipeline branch meets the preset second flow range, and whether the pressure value of each pipeline branch meets the preset pressure range.

8. The test method for the simulated energy storage liquid cooling system according to claim 4, characterized in that, In step S2, each flow sensor is controlled to monitor the liquid flow rate in the corresponding pipeline branch to obtain the total liquid flow rate value and the liquid flow rate value of each pipeline branch; after controlling each pressure sensor to monitor the pressure value of each pipeline branch, the following steps are also included: S23. Detect whether the pressure value of each of the pipeline branches is higher than the preset critical upper limit pressure value; S24. If the pressure value of each of the pipeline branches is higher than the preset critical upper limit pressure value, then control the test device to stop operating. S25. If the pressure value of each of the pipeline branches is lower than the preset critical upper limit pressure value, the following steps are performed: detecting whether the total liquid flow rate meets the preset first flow range value, whether the liquid flow rate value of each of the pipeline branches meets the preset second flow range value, and whether the pressure value of each of the pipeline branches meets the preset pressure range value.

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