Automatic temperature control system of UPS (Uninterrupted Power Supply)

Abstract

The invention belongs to the technical field of UPS power supply cooling, and particularly discloses a UPS power supply automatic temperature control system which comprises a battery bin cooling cavity, a function bin cooling cavity, a liquid storage box and a temperature control box. The plurality of fiber grating sensors are used for acquiring temperature parameters of the battery compartment cooling cavity and the functional compartment cooling cavity; the data analysis module is used for generating a temperature distribution diagram; and the control module is connected with the UPS and the data analysis module and is used for controlling the circulation path of the cooling liquid based on the charging and discharging states of the UPS and the temperature distribution diagram so as to dynamically control the temperature of the cooling liquid flowing through the battery compartment cooling cavity and the functional compartment cooling cavity. The battery bin cooling cavity and the function bin cooling cavity are constructed according to the internal structure characteristics of the UPS, liquid cooling is conducted on the storage battery and the function element, the control module controls the cooling liquid circulation path, the cooling liquid temperature is dynamically adjusted according to the working condition, automatic temperature control is completed in a targeted mode, the operation stability of the UPS is guaranteed, and the service life of the UPS is prolonged. And the service life is prolonged.

Description

Technical Field

[0001] The present invention belongs to the technical field of UPS power supply cooling, and particularly relates to an automatic temperature control system for UPS power supplies. Background Art

[0002] With the increasing requirements for power supply stability in data centers, communication base stations, and industrial equipment, as a key backup power supply, the reliability and energy efficiency of the thermal management technology of UPS power supplies have become the focus of industry attention. Traditional UPS power supplies mostly adopt air-cooled heat dissipation technology, but there are problems such as low heat dissipation efficiency and high noise. Although liquid-cooled technology can increase the heat dissipation efficiency by more than three times, existing liquid-cooled systems generally require independent refrigeration units and are difficult to cool specifically according to different working states of UPS power supplies. The charging process of UPS power supplies includes at least fast charging, slow charging, and floating charging. During the fast charging stage, the temperature rise is high and rapid cooling is required. During the slow charging stage, the temperature is relatively stable. In order to ensure that the UPS power supply always remains fully charged, the UPS power supply is in a floating charging state for a long time. Therefore, it is necessary to formulate a cooling strategy for different charge and discharge states.

[0003] Chinese Patent with publication number CN119582421A discloses a UPS power supply based on a dual temperature compensation algorithm of an ARM processor. Through the ARM processor and the dual temperature compensation algorithm, the charge and discharge parameters are adjusted according to the battery pack temperature to indirectly control the battery temperature and avoid the performance degradation of the battery due to too high or too low temperature. In this solution, although corresponding strategies are proposed for different working conditions, it does not involve how to ensure the working temperature of the UPS power supply under different working conditions, especially during the floating charging stage, and the temperature of the UPS power supply cannot be ensured by adjusting the charge and discharge parameters. Summary of the Invention

[0004] The purpose of the present invention is to overcome the defects existing in the prior art and provide an automatic temperature control system for UPS power supplies.

[0005] The present invention provides an automatic temperature control system for UPS power supplies, including:

[0006] A battery compartment cooling cavity and a functional compartment cooling cavity provided on the inner wall of the UPS power supply box body, the battery compartment cooling cavity and the functional compartment cooling cavity are connected, and a liquid storage tank is further provided on the outer side of the UPS power supply box body. The liquid storage tank is connected to the battery compartment cooling cavity through a cooling pipeline, and a bypass pipeline is further provided on the cooling pipeline. A temperature control box is provided on the bypass pipeline for adjusting the temperature of the coolant entering the battery compartment cooling cavity;

[0007] A plurality of fiber Bragg grating sensors are provided inside the battery compartment cooling cavity and the functional compartment cooling cavity for obtaining the temperature parameters of the battery compartment cooling cavity and the functional compartment cooling cavity;

[0008] The data analysis module, connected to the fiber Bragg grating sensor, receives the temperature parameters of the battery compartment cooling cavity and the function compartment cooling cavity, spatially aligns the temperature parameters with the battery compartment cooling cavity and the function compartment cooling cavity respectively, and generates a temperature distribution map;

[0009] The control module, connected to the UPS power supply and the data analysis module, controls the circulation path of the coolant based on the charge and discharge state of the UPS power supply and the temperature distribution map, so as to dynamically control the temperature of the coolant flowing through the battery compartment cooling cavity and the function compartment cooling cavity.

[0010] In a further solution, an outlet and a return port are provided at the top of the liquid storage tank, and the return port is communicated with the first outlet of the function compartment cooling cavity through a return pipeline; a three-way joint is provided at the outlet, the first interface of the three-way joint is connected to the outlet, the second interface of the three-way joint is communicated with the inlet of the battery compartment cooling cavity through a cooling pipeline, the third interface of the three-way joint is communicated with the second outlet of the function compartment cooling cavity through a bypass pipeline, and a variable frequency pump is provided in the function compartment cooling cavity;

[0011] A first solenoid valve, a flow meter, a circulation pump and a first temperature sensor are sequentially arranged on the cooling pipeline, and a second solenoid valve and a return pump are arranged on the return pipeline;

[0012] The bypass pipeline includes a low-temperature pipe, a temperature control box and a high-temperature pipe. One end of the low-temperature pipe is communicated with the third interface of the three-way joint, the other end of the low-temperature pipe is communicated with the temperature control box, one end of the high-temperature pipe is communicated with the temperature control box, the other end of the high-temperature pipe is communicated with the second outlet of the function compartment cooling cavity, the outlet end of the temperature control box is communicated with the cooling pipeline through a temperature control pipe, and the connection point of the temperature control pipe and the cooling pipeline is located between the flow meter and the circulation pump;

[0013] A third solenoid valve and a first temperature control pump are sequentially arranged on the low-temperature pipe, a fourth solenoid valve is arranged on the temperature control pipe, and a second temperature sensor, a fifth solenoid valve and a second temperature control pump are sequentially arranged on the high-temperature pipe.

[0014] In a further solution, the temperature control box includes a confluence box body, and opening degree adjusting components are respectively arranged on both sides of the confluence box body for adjusting the flow opening degrees of the low-temperature pipe and the high-temperature pipe entering the confluence box body; a liquid inlet three-way pipe is arranged inside the confluence box body, the two horizontal pipelines of the liquid inlet three-way pipe are respectively communicated with the two opening degree adjusting components, the vertical pipeline of the liquid inlet three-way pipe is a confluence pipe, and a plurality of confluence baffle plates are arranged inside the confluence pipe for mixing the coolants entering the confluence box body from the low-temperature pipe and the high-temperature pipe; the temperature control pipe is communicated with the confluence box body and extends to the bottom of the confluence box body.

[0015] A further solution is that the opening adjustment assembly includes a confluence port and a fixing plate, wherein the fixing plate is located at the bottom of the confluence port and serves as a mounting plate for the driving component;

[0016] A plug is provided inside the confluence port for adjusting the outlet size of the reflux port, and the plug is slidably connected to the confluence port;

[0017] The driving component includes a guide rail arranged on the fixed plate, a slider is slidably arranged on the guide rail, and a lead screw is also arranged inside the guide rail, the lead screw passes through the slider and is threadedly connected to the slider, a rotating motor is arranged at one end of the guide rail, the rotating motor is transmission-connected to the lead screw, one end of the lead screw away from the rotating motor is rotationally connected to the end of the guide rail through a bearing, the slider and the plug are connected through a push rod, one end of the push rod is hinged to the plug through a hinge seat, and the other end of the push rod is hinged to the slider through a hinge head;

[0018] The guide rail is rotatably connected to the fixed plate via a rotating shaft, a rotating motor is provided at the bottom of the fixed plate, and the rotating motor is transmission-connected to the rotating shaft;

[0019] An annular sliding groove is also provided on the fixed plate, and a roller adapted to the annular sliding groove is provided at the bottom of the guide rail, and the bottom of the roller abuts against the bottom of the annular sliding groove.

[0020] A further solution is that the control module includes a battery status acquisition unit, a coolant circulation strategy unit, an execution unit and a flow opening model;

[0021] The battery status acquisition unit is used to acquire the charge and discharge status of the battery, and divide the charge and discharge status into a constant current charging state, a constant voltage charging state, a floating charging state and a discharging state;

[0022] The coolant circulation strategy unit formulates different coolant circulation strategies based on different charge and discharge states;

[0023] The execution unit controls the opening and closing of the liquid return pipeline, the cooling pipeline or the bypass pipeline based on the coolant circulation strategy;

[0024] The flow opening model is used to adjust the flow opening of the two opening adjustment components, thereby controlling the flow ratio of the low-temperature tube and the high-temperature tube into the junction box coolant, so that the temperature of the coolant flowing out of the temperature control tube meets the preset temperature.

[0025] A further solution is that the coolant circulation strategy formulated by the coolant circulation strategy unit includes:

[0026] First circulation path: the coolant enters the battery compartment cooling cavity through the liquid storage tank, and circulates in the battery compartment cooling cavity and the functional compartment cooling cavity after meeting the flow requirements;

[0027] Second circulation path: The coolant enters the battery compartment cooling chamber from the liquid storage tank and circulates in the battery compartment cooling chamber, the functional compartment cooling chamber, and the liquid storage tank after meeting the flow requirements.

[0028] Third circulation path: The coolant enters the battery compartment cooling chamber from the liquid storage tank and circulates in the battery compartment cooling chamber, the functional compartment cooling chamber, and the temperature control box after meeting the flow requirements.

[0029] In the constant current charging state and the discharging state, the execution unit executes the second circulation path; in the constant voltage charging state, the execution unit executes the first circulation path; in the floating charge state, the execution unit executes the third circulation path based on the output result of the flow opening model.

[0030] A further solution is that the construction process of the flow opening model is as follows:

[0031] Set a preset temperature T, obtain the temperature parameters of the second temperature sensor in different states of the storage battery, divide the temperature range based on the maximum and minimum values of the temperature parameters, evenly divide a number of temperature point values within the temperature range, and each temperature point value corresponds to an opening coefficient pair (KA, KB), where KA is the opening coefficient at the inlet end of the low-temperature pipe and KB is the opening coefficient at the inlet end of the high-temperature pipe, so that when the opening pair (KA, KB) is used, the temperature parameter of the first temperature sensor is equal to the preset temperature T; obtain a large number of temperature point values and the mapping relationship between the opening coefficient pairs (KA, KB) corresponding to the temperature nodes, mark them through an artificial expert, and after marking, input the temperature point values and the opening coefficient pairs (KA, KB) into the neural network unit for iterative training to obtain the flow opening model, so that when the temperature point value is input, the opening coefficient pair (KA, KB) is output, and the temperature parameter of the first temperature sensor is equal to the preset temperature T;

[0032] The execution unit controls the rotation motor to drive the guide rail to rotate based on the opening coefficient pair (KA, KB), and further enables the plug to slide at the confluence port to achieve opening adjustment.

[0033] A further solution is that one end of the guide rail far from the sliding motor is on the same axis as the center of the plug, and the guide rail is divided into a number of length point values according to the temperature range, and the length point values correspond one-to-one with the temperature point values;

[0034] The length point value is the horizontal distance of the slider from the axis of the plug;

[0035] The execution unit controls a sliding motor at the outlet end of the high-temperature pipe based on the current temperature point value to drive the lead screw to rotate, thereby adjusting the position of the slider to the length point value corresponding to the current temperature point value, so as to adjust the sliding stroke of the plug at the outlet end of the high-temperature pipe; and corrects the opening coefficient pair (KA, KB) based on the adjusted sliding stroke.

[0036] Furthermore, the control module further includes a threshold setting unit and a temperature compensation unit;

[0037] The threshold setting unit is used to set the temperature thresholds of the battery compartment cooling chamber and the function compartment cooling chamber,

[0038] The threshold setting unit is connected to the data analysis module and formulates a coolant circulation strategy based on the temperature distribution map:

[0039] When the temperature of the battery compartment is higher than the battery compartment operation threshold, the execution unit executes the first circulation path;

[0040] When the temperature of the battery compartment is higher than the battery compartment warning threshold, the execution unit executes the second circulation path;

[0041] When the temperature of the function compartment is higher than the function compartment operation threshold, the execution unit executes the first circulation path;

[0042] When the temperature of the function compartment is higher than the function compartment warning threshold, the execution unit executes the second circulation path;

[0043] The temperature compensation unit is configured as follows: when the ambient temperature > 35°C, the battery compartment operation threshold is lowered; when the ambient temperature < 10°C, the battery compartment operation threshold is raised.

[0044] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0045] The present invention breaks through the limitation of indirectly controlling temperature only through charge and discharge parameters, and realizes active and precise temperature control for the entire life cycle and all working conditions of the UPS power supply by combining physical liquid cooling circulation with intelligent algorithms. The battery compartment cooling chamber and the function compartment cooling chamber are constructed according to the internal structural characteristics of the UPS power supply to perform liquid cooling on the storage battery and functional components respectively. The control module controls the coolant circulation path based on the charge and discharge state of the storage battery and the temperature distribution map, dynamically adjusts the coolant temperature according to the working conditions, and completes automatic temperature control specifically, ensuring the operation stability of the UPS power supply and extending its service life.

[0046] The driving component of the present invention drives the guide rail to rotate through a rotating motor, enabling the plug to slide relative to the confluence port, thereby playing a role in adjusting the flow opening degrees of the low-temperature pipe and the high-temperature pipe, facilitating the adjustment of the temperature of the mixed coolant in the confluence box body, and ensuring that the storage battery always maintains the optimal temperature in the floating charge state. To further ensure the coolant temperature at the outlet end of the confluence box body, the sliding motor can drive the lead screw to rotate to adjust the position of the slider, which is used to adjust the sliding stroke of the plug at the high-temperature pipe end.

[0047] The neural network model trained with a large number of samples in the present invention realizes the non-linear mapping between the coolant temperature and the opening coefficient, improving the system's adaptability and enabling it to handle complex scenarios such as battery aging and environmental temperature changes. The model dynamically adjusts the opening ratio of the low-temperature pipe and the high-temperature pipe, reducing the coolant flow while maintaining a small range of temperature fluctuations during the floating charge stage, avoiding the risk of local overcooling or overheating of the battery pack caused by excessive coolant circulation.

[0048] The length point values of the guide rail in the present invention correspond one-to-one with the temperature point values. Combining with the angle adjustment of the rotating motor, it realizes the dual control of linear displacement and rotation angle of the opening. At the outlet end of the high-temperature pipe, the sliding motor can dynamically adjust the initial position of the plug according to the real-time temperature data, reducing the mixed flow control error compared with the pure angle adjustment scheme. The sliding motor drives the slider to quickly move to the corresponding length point value to compensate for the flow deviation caused by the change in coolant viscosity. The system automatically calibrates the opening coefficient through the mapping relationship between the length point value and the temperature point value, improving the temperature control accuracy of the system during the floating charge stage. Description of the Drawings

[0049] The following drawings only schematically illustrate and explain the present invention and are not used to limit the scope of the present invention, where:

[0050] Figure 1 : Schematic diagram of the connection structure of the present invention;

[0051] Figure 2 : Schematic diagram of the connection structure of the temperature control box;

[0052] Figure 3 : Schematic diagram of the structure of the opening adjustment component;

[0053] Figure 4 : Schematic diagram of the adjustment of the sliding stroke of the plug;

[0054] Figure 5 : Schematic diagram of the structure of the confluence pipe;

[0055] Figure 6 : Schematic block diagram of the control process of the present invention;

[0056] In the figure: 1. Liquid storage tank; 2. Liquid return port; 3. Three-way joint; 4. Liquid return pipeline; 5. Cooling pipeline; 6. First solenoid valve; 7. Second solenoid valve; 8. Third solenoid valve; 9. Fourth solenoid valve; 10. Fifth solenoid valve; 11. Liquid return pump; 12. Circulation pump; 13. First temperature control pump; 14. Second temperature control pump; 15. Flowmeter; 16. First temperature sensor; 17. Battery compartment cooling cavity; 18. Function compartment cooling cavity; 19. First outlet; 20. Second outlet; 21. Second temperature sensor; 22. Variable frequency pump; 23. Temperature control box; 24. Low-temperature pipe; 25. High-temperature pipe; 26. Confluence port; 27. Plug; 28. Hinge seat; 29. Push rod; 30. Slide block; 31. Guide rail; 32. Fixed plate; 33. Rotating motor; 34. Sliding motor; 35. Confluence box body; 36. Liquid inlet three-way pipe; 37. Confluence pipe; 38. Lead screw; 39. Hinge joint; 40. Confluence baffle; 41. Temperature control pipe; 42. Annular chute; 43. Roller; 44. Battery state acquisition unit; 45. Coolant circulation strategy unit; 46. Execution unit; 47. Flow opening model; 48. Threshold setting unit; 49. Temperature compensation unit; 50. Control module; 51. Fiber Bragg grating sensor; 52. Fiber Bragg grating sensor. Detailed implementation manner

[0057] In order to make the purpose, technical solution, design method and advantages of the present invention clearer, the present invention will be further described in detail below through specific embodiments with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0058] As Figure 1 and Figure 6 shown, the present invention provides an automatic temperature control system for a UPS power supply, including:

[0059] A battery compartment cooling cavity 17 and a function compartment cooling cavity 18 provided on the inner wall of the UPS power supply box body, the battery compartment cooling cavity 17 and the function compartment cooling cavity 18 are communicated, and a liquid storage tank 1 is further provided on the outer side of the UPS power supply box body for storing coolant, and liquid cooling is realized by circulating the coolant in the battery compartment cooling cavity 17 and the function compartment cooling cavity 18; wherein, the liquid storage tank 1 is communicated with the battery compartment cooling cavity 17 through a cooling pipeline 5, and a bypass pipeline is further provided on the cooling pipeline 5, and a temperature control box 23 is provided on the bypass pipeline for adjusting the temperature of the coolant entering the battery compartment cooling cavity 17;

[0060] A plurality of fiber Bragg grating sensors 52 are provided inside the battery compartment cooling cavity 17 and the function compartment cooling cavity 18 for acquiring temperature parameters of the battery compartment cooling cavity 17 and the function compartment cooling cavity 18;

[0061] The data analysis module 51, connected to the fiber Bragg grating sensor 52, receives the temperature parameters of the battery compartment cooling chamber 17 and the function compartment cooling chamber 18, spatially aligns the temperature parameters with the battery compartment cooling chamber 17 and the function compartment cooling chamber 18 respectively, and generates a temperature distribution map;

[0062] The control module 50, connected to the UPS power supply and the data analysis module 51, controls the circulation path of the coolant based on the charge and discharge state of the UPS power supply and the temperature distribution map, so as to dynamically control the temperature of the coolant flowing through the battery compartment cooling chamber 17 and the function compartment cooling chamber 18.

[0063] Continue to refer to Figure 1 , an outlet and a return port 2 are provided at the top of the liquid storage tank 1, and the return port 2 is communicated with the first outlet 19 of the function compartment cooling chamber 18 through a return pipeline 4; a three-way joint 3 is provided at the outlet, the first interface of the three-way joint 3 is connected to the outlet, the second interface of the three-way joint 3 is communicated with the inlet of the battery compartment cooling chamber 17 through a cooling pipeline 5, the third interface of the three-way joint 3 is communicated with the second outlet 20 of the function compartment cooling chamber 18 through a bypass pipeline, and a variable frequency pump 22 is provided in the function compartment cooling chamber 18; a first solenoid valve 6, a flow meter 15, a circulation pump 12 and a first temperature sensor 16 are sequentially arranged on the cooling pipeline 5, and a second solenoid valve 7 and a return pump 11 are arranged on the return pipeline 4;

[0064] In the above, the bypass pipeline includes a low-temperature pipe 24, a temperature control box 23 and a high-temperature pipe 25. One end of the low-temperature pipe 24 is communicated with the third interface of the three-way joint 3, the other end of the low-temperature pipe 24 is communicated with the temperature control box 23, one end of the high-temperature pipe 25 is communicated with the temperature control box 23, the other end of the high-temperature pipe 25 is communicated with the second outlet 20 of the function compartment cooling chamber 18, the outlet end of the temperature control box 23 is communicated with the cooling pipeline 5 through a temperature control pipe 41, and the connection point of the temperature control pipe 41 and the cooling pipeline 5 is located between the flow meter 15 and the circulation pump 12; a third solenoid valve 8 and a first temperature control pump 13 are sequentially arranged on the low-temperature pipe 24, a fourth solenoid valve 9 is arranged on the temperature control pipe 41, and a second temperature sensor 21, a fifth solenoid valve 10 and a first temperature control pump 14 are sequentially arranged on the high-temperature pipe 25.

[0065] As Figure 2 and Figure 3 shown, the temperature control box 23 includes a confluence box body 35, and opening degree adjusting components are respectively arranged on both sides of the confluence box body 35 for adjusting the flow opening degrees of the low-temperature pipe 24 and the high-temperature pipe 25 entering the confluence box body 35; a liquid inlet three-way pipe 36 is arranged inside the confluence box body 35, the two horizontal pipelines of the liquid inlet three-way pipe 36 are respectively communicated with the two opening degree adjusting components, and the vertical pipeline of the liquid inlet three-way pipe 36 is a confluence pipe 37, asFigure 5 As shown, several flow - collecting baffles 40 are arranged inside the flow - collecting pipe 37 for mixing the coolant flowing into the flow - collecting box body 35 from the low - temperature pipe 24 and the high - temperature pipe 25. Among them, the flow - collecting baffle 40 is formed by twisting a rectangular baffle by a certain angle. When the mixed liquid passes through each flow - collecting baffle 40, it will be divided into two paths and then mixed; the temperature - control pipe 41 is communicated with the flow - collecting box body 35 and extends to the bottom of the flow - collecting box body 35. Among them, the opening - degree adjusting component includes a flow - collecting port 26 and a fixing plate 32. The fixing plate 32 is located at the bottom of the flow - collecting port 26 and serves as the mounting plate for the driving component; a plug 27 is arranged inside the flow - collecting port 26 for adjusting the outlet size of the return port. The plug 27 is slidably connected with the flow - collecting port 26; the driving component includes a guide rail 31 arranged on the fixing plate 32. A slider 30 is slidably arranged on the guide rail 31, and a lead screw 38 is also arranged inside the guide rail 31. The lead screw 38 penetrates through the slider 30 and is threadedly connected with the slider 30. A rotating motor 33 is arranged at one end of the guide rail 31. The rotating motor 33 is in transmission connection with the lead screw 38. The end of the lead screw 38 away from the rotating motor 33 is rotatably connected with the end of the guide rail 31 through a bearing. The slider 30 and the plug 27 are connected by a push rod 29. One end of the push rod 29 is hinged to the plug 27 through a hinge seat 28, and the other end of the push rod 29 is hinged to the slider 30 through a hinge joint 39; the guide rail 31 is rotatably connected with the fixing plate 32 through a rotating shaft. A rotating motor 33 is arranged at the bottom of the fixing plate 32, and the rotating motor 33 is in transmission connection with the rotating shaft; an annular chute 42 is also opened on the fixing plate 32, and a roller 43 adapted to the annular chute 42 is arranged at the bottom of the guide rail 31. The bottom of the roller 43 abuts against the bottom of the annular chute 42.

[0066] Continue to refer to Figure 6 As described above, the control module 50 includes a battery - state acquisition unit 44, a coolant - circulation strategy unit 45, an execution unit 46, and a flow - opening - degree model 47; among them, the battery - state acquisition unit 44 is used to acquire the charge - discharge state of the storage battery and divide the charge - discharge state into a constant - current charging state, a constant - voltage charging state, a floating - charge state, and a discharging state; the coolant - circulation strategy unit 45 formulates different coolant - circulation strategies based on different charge - discharge states; the execution unit 46 controls the opening and closing of the liquid - return pipeline 4, the cooling pipeline 5, or the bypass pipeline based on the coolant - circulation strategy; the flow - opening - degree model 47 is used to regulate the flow opening degrees of the two opening - degree adjusting components, and further control the flow ratio of the coolant flowing into the flow - collecting box body 35 from the low - temperature pipe 24 and the high - temperature pipe 25, so that the temperature of the coolant flowing out of the temperature - control pipe 41 meets the preset temperature.

[0067] In the above, the coolant - circulation strategies formulated by the coolant - circulation strategy unit 45 include:

[0068] ​First circulation path: The coolant enters the battery compartment cooling cavity 17 from the liquid storage tank 1 and circulates between the battery compartment cooling cavity 17 and the functional compartment cooling cavity 18 after meeting the flow requirement.

[0069] Second circulation path: The coolant enters the battery compartment cooling cavity 17 from the liquid storage tank 1 and circulates among the battery compartment cooling cavity 17, the functional compartment cooling cavity 18, and the liquid storage tank 1 after meeting the flow requirement.

[0070] Third circulation path: The coolant enters the battery compartment cooling cavity 17 from the liquid storage tank 1 and circulates among the battery compartment cooling cavity 17, the functional compartment cooling cavity 18, and the temperature control box 23 after meeting the flow requirement.

[0071] In the constant current charging state and the discharging state, the execution unit 46 executes the second circulation path; in the constant voltage charging state, the execution unit 46 executes the first circulation path; in the floating charge state, the execution unit 46 executes the third circulation path based on the output result of the flow opening model 47. Specifically, the process of the execution unit 46 executing the first circulation path is as follows: The execution unit 46 controls the first solenoid valve 6 to open, starts the circulation pump 12 to pump the coolant from the liquid storage tank 1 to the battery compartment cooling cavity 17, and the execution unit 47 closes the circulation pump 12 in a timely manner by monitoring the flow meter 15 and starts the variable frequency pump 22 to make the coolant circulate between the battery compartment cooling cavity 17 and the functional compartment cooling cavity 18; the process of the execution unit 46 executing the second circulation path is as follows: The execution unit 46 controls the first solenoid valve 6 to open, starts the circulation pump 12 to pump the coolant from the liquid storage tank 1 to the battery compartment cooling cavity 17, starts the variable frequency pump 22 to make the coolant circulate between the battery compartment cooling cavity 17 and the functional compartment cooling cavity 18, opens the first outlet 19 and the second solenoid valve 7, and starts the return liquid pump 11 to pump the coolant to the liquid storage tank 1 to form a circulation loop; the process of the execution unit 46 executing the third circulation path is as follows: The execution unit 46 controls the third solenoid valve 8 to open, starts the first temperature control pump 13 to pump the coolant from the liquid storage tank 1 to the busbar box 35, controls the fifth solenoid valve 10 and the second outlet 20 to open, starts the second temperature control pump 14 to pump the coolant from the functional compartment cooling cavity 18 to the busbar box 35. After the two parts of the coolant are mixed in the busbar box 35, the execution unit 46 controls the fourth solenoid valve 9 to open, starts the circulation pump 12 to pump the mixed coolant to the battery compartment cooling cavity 17, starts the variable frequency pump 22 to make the coolant circulate between the battery compartment cooling cavity 17 and the functional compartment cooling cavity 18 and then pumps it out from the second outlet 20 to form a circulation loop. During the process of executing the third circulation path, since it is necessary to control the temperature at the outlet end of the busbar box 35, therefore, it is necessary to strictly control the opening coefficients of the inlet ends of the high-temperature pipe 25 and the low-temperature pipe 24 through the flow opening model 47.

[0072] It should be noted that when the execution unit 46 executes the circulation path, the default state of all solenoid valves is closed.

[0073] In the above, the construction process of the flow opening model 47 is as follows:

[0074] Set a preset temperature T, obtain the temperature parameters of the second temperature sensor 21 under different states of the battery, divide the temperature range based on the maximum and minimum values of the temperature parameters, evenly divide a number of temperature point values within the temperature range, and each temperature point value corresponds to an opening coefficient pair (KA, KB), where KA is the opening coefficient at the inlet end of the low-temperature pipe 24, and KB is the opening coefficient at the inlet end of the high-temperature pipe 25, so that when the opening pair (KA, KB) is used, the temperature parameter of the first temperature sensor 16 is equal to the preset temperature T; obtain a large number of temperature point values and the mapping relationship between the opening coefficient pairs (KA, KB) corresponding to the temperature nodes, mark them through artificial experts, and after marking, input the temperature point values and the opening coefficient pairs (KA, KB) into the neural network unit for iterative training to obtain the flow opening model 47, so that when the temperature point value is input, the opening coefficient pair (KA, KB) is output, and the temperature parameter of the first temperature sensor 16 is equal to the preset temperature T; in this embodiment, the neural network unit is a multi-layer perceptron (MLP), including an input layer, a hidden layer, and an output layer. Among them, the input layer inputs the current temperature point value, and the hidden layer adopts a structure of 3 fully connected layers. The first hidden layer contains 128 neurons and uses ReLU as the activation function. The second hidden layer has 64 neurons and also uses the ReLU activation function to further abstract and extract the input information. The third hidden layer contains 32 neurons and continuously screens and combines the features. In this embodiment, in order to prevent the model from overfitting, a Dropout layer is also added between the hidden layers, and its ratio is set to 0.2 to enhance the generalization ability of the model. The output layer outputs the flow opening coefficients KA and KB. It contains 2 neurons, corresponding to these two opening coefficients respectively.

[0075] The execution unit 46 controls the rotation motor 33 to drive the guide rail 31 to rotate based on the opening coefficient pair (KA, KB), so that the plug 27 slides at the confluence 26 to achieve opening adjustment. When the rotation motor 33 rotates one week, the two plugs 27 reciprocate once in the predetermined sliding stroke under the action of the push rod 29. Therefore, when the opening coefficient pair (KA, KB) is determined, the opening can be adjusted by the rotation angle of the rotation motor 33.

[0076] In this embodiment, one end of the guide rail 31 away from the sliding motor 34 is on the same axis as the center of the plug 27. The guide rail 31 is divided into several length point values according to temperature ranges, and the length point values correspond one-to-one with the temperature point values; the length point value is the horizontal distance between the slider 30 and the axis of the plug 27. Since the coolant flowing out of the high-temperature pipe 25 takes away the heat of the battery compartment and the function compartment, the coolant temperature is a variable. To further improve the mixing accuracy of the coolant, the execution unit 46 controls the sliding motor 34 at the outlet end of the high-temperature pipe 25 to drive the lead screw 38 to rotate based on the current temperature point value, thereby adjusting the position of the slider 30 to the length point value corresponding to the current temperature point value, so as to adjust the sliding stroke of the plug 27 at the outlet end of the high-temperature pipe 25; correct the opening coefficient pair (KA, KB) based on the adjusted sliding stroke. As Figure 4 shown, after the sliding motor 34 drives the lead screw 38 to rotate, the slider 30 slides along the guide rail, causing the initial position of the plug 27 to change. During the process of the slider 30 sliding to the left, the initial opening at the outlet end of the high-temperature pipe 25 gradually decreases. Therefore, on the premise of determining the opening coefficient pair (KA, KB), the flow rate of the high-temperature pipe 25 flowing into the confluence box body 35 becomes smaller. Since the length point value corresponds one-to-one with the temperature point value, and the length point value is the horizontal distance between the slider 30 and the axis of the plug 27, the higher the temperature point value, the closer the slider 30 is to the axis of the plug 27, and the smaller the flow rate of the high-temperature pipe 25 flowing into the confluence box body 35, and thus it is easier to reduce the temperature at the outlet end of the confluence box body 35.

[0077] In this embodiment, the control module 50 further includes a threshold setting unit 48 and a temperature compensation unit 49;

[0078] The threshold setting unit 48 is used to set the operation threshold and warning threshold of the battery compartment cooling chamber 17 and the function compartment cooling chamber 18; among them, the battery compartment operation threshold is 15 - 30 °C; the battery compartment warning threshold is 35 - 40 °C; the function compartment operation threshold is: 20 - 40 °C; the function compartment warning threshold is: 40 - 50 °C.

[0079] The threshold setting unit 48 is connected to the data analysis module 51, and determines the coolant circulation strategy based on the comparison between the temperature distribution map and the operation threshold and warning threshold:

[0080] When the temperature of the battery compartment is higher than the battery compartment operation threshold, the execution unit 46 executes the first circulation path;

[0081] When the temperature of the battery compartment is higher than the battery compartment warning threshold, the execution unit 46 executes the second circulation path;

[0082] When the temperature of the function compartment is higher than the function compartment operation threshold, the execution unit 46 executes the first circulation path;

[0083] When the temperature of the functional compartment is higher than the warning threshold of the functional compartment, the execution unit 46 executes the second loop path;

[0084] The temperature compensation unit 49 is configured such that when the ambient temperature > 35°C, the operating threshold of the battery compartment is lowered, and when the ambient temperature < 10°C, the operating threshold of the battery compartment is raised. Specifically, when the ambient temperature > 35°C, the operating threshold of the battery compartment is adjusted to 15 - 28°C to initiate cooling in advance, and when the ambient temperature < 10°C, the operating threshold of the battery compartment is adjusted to 20 - 30°C to avoid capacity degradation caused by excessive cooling.

[0085] The embodiments of the present invention have been described above. The above description is exemplary and not exhaustive, and is also not limited to the disclosed embodiments. Many modifications and variations are obvious to those of ordinary skill in the art in the technical field without departing from the scope and spirit of the described embodiments. The choice of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other ordinary skill in the art in the technical field to understand the disclosed embodiments.

Claims

1. The automatic temperature control system of the UPS power supply is characterized in that, Including: A battery compartment cooling cavity (17) and a functional compartment cooling cavity (18) provided on the inner wall of the UPS power supply box body. The battery compartment cooling cavity (17) and the functional compartment cooling cavity (18) are communicated. A liquid storage tank (1) is also provided outside the UPS power supply box body. The liquid storage tank (1) is communicated with the battery compartment cooling cavity (17) through a cooling pipeline (5). A bypass pipeline is also provided on the cooling pipeline (5). A temperature control box (23) is provided on the bypass pipeline for adjusting the temperature of the coolant entering the battery compartment cooling cavity (17); A plurality of fiber Bragg grating sensors (52) provided inside the battery compartment cooling cavity (17) and the functional compartment cooling cavity (18) for obtaining the temperature parameters of the battery compartment cooling cavity (17) and the functional compartment cooling cavity (18); A data analysis module (51) connected to the fiber Bragg grating sensors (52), receiving the temperature parameters of the battery compartment cooling cavity (17) and the functional compartment cooling cavity (18), spatially aligning the temperature parameters with the battery compartment cooling cavity (17) and the functional compartment cooling cavity (18) respectively, and generating a temperature distribution map; A control module (50) connected to the UPS power supply and the data analysis module (51), controlling the circulation path of the coolant based on the charge and discharge state of the UPS power supply and the temperature distribution map so as to dynamically control the temperature of the coolant flowing through the battery compartment cooling cavity (17) and the functional compartment cooling cavity (18).

2. The automatic temperature control system for UPS power supply according to claim 1, characterized in that, An outlet and a return port (2) are provided at the top of the liquid storage tank (1). The return port (2) is communicated with the first outlet (19) of the functional compartment cooling cavity (18) through a return pipeline (4); A three-way joint (3) is provided at the outlet. The first interface of the three-way joint (3) is connected to the outlet. The second interface of the three-way joint (3) is communicated with the inlet of the battery compartment cooling cavity (17) through a cooling pipeline (5). The third interface of the three-way joint (3) is communicated with the second outlet (20) of the functional compartment cooling cavity (18) through a bypass pipeline. A variable frequency pump (22) is provided in the functional compartment cooling cavity (18); A first solenoid valve (6), a flowmeter (15), a circulation pump (12) and a first temperature sensor (16) are sequentially provided on the cooling pipeline (5). A second solenoid valve (7) and a return pump (11) are provided on the return pipeline (4); The bypass pipeline includes a low-temperature pipe (24), a temperature control box (23) and a high-temperature pipe (25). One end of the low-temperature pipe (24) is communicated with the third interface of the three-way joint (3). The other end of the low-temperature pipe (24) is communicated with the temperature control box (23). One end of the high-temperature pipe (25) is communicated with the temperature control box (23). The other end of the high-temperature pipe (25) is communicated with the second outlet (20) of the functional compartment cooling cavity (18). The outlet end of the temperature control box (23) is communicated with the cooling pipeline (5) through a temperature control pipe (41), and the connection point of the temperature control pipe (41) and the cooling pipeline (5) is located between the flowmeter (15) and the circulation pump (12); A third solenoid valve (8) and a first temperature control pump (13) are successively arranged on the low-temperature pipe (24), a fourth solenoid valve (9) is arranged on the temperature control pipe (41), and a second temperature sensor (21), a fifth solenoid valve (10) and a first temperature control pump (14) are successively arranged on the high-temperature pipe (25).

3. The UPS power supply automatic temperature control system according to claim 2, wherein, The temperature control box (23) includes a confluence box body (35). Opening degree adjusting components are respectively arranged on both sides of the confluence box body (35) for adjusting the flow opening degrees of the low-temperature pipe (24) and the high-temperature pipe (25) entering the confluence box body (35); an inlet liquid three-way pipe (36) is arranged inside the confluence box body (35). The two horizontal pipelines of the inlet liquid three-way pipe (36) are respectively communicated with the two opening degree adjusting components. The vertical pipeline of the inlet liquid three-way pipe (36) is a confluence pipe (37). A plurality of confluence baffle plates (40) are arranged inside the confluence pipe (37) for mixing the coolant of the low-temperature pipe (24) and the high-temperature pipe (25) entering the confluence box body (35); the temperature control pipe (41) is communicated with the confluence box body (35) and extends to the bottom of the confluence box body (35).

4. The UPS power supply automatic temperature control system according to claim 3, characterized in that, The opening degree adjusting component includes a confluence port (26) and a fixing plate (32). The fixing plate (32) is located at the bottom of the confluence port (26) and serves as a mounting plate for the driving component; A plug (27) is arranged inside the confluence port (26) for adjusting the outlet size of the return port. The plug (27) is slidably connected with the confluence port (26); The driving component includes a guide rail (31) arranged on the fixing plate (32). A slider (30) is slidably arranged on the guide rail (31), and a lead screw (38) is further arranged inside the guide rail (31). The lead screw (38) penetrates through the slider (30) and is in threaded connection with the slider (30). A rotating motor (33) is arranged at one end of the guide rail (31). The rotating motor (33) is in transmission connection with the lead screw (38). The end of the lead screw (38) away from the rotating motor (33) is rotatably connected with the end of the guide rail (31) through a bearing. The slider (30) and the plug (27) are connected through a push rod (29). One end of the push rod (29) is hinged with the plug (27) through a hinge seat (28), and the other end of the push rod (29) is hinged with the slider (30) through a hinge joint (39); The guide rail (31) is rotatably connected with the fixing plate (32) through a rotating shaft. A rotating motor (33) is arranged at the bottom of the fixing plate (32). The rotating motor (33) is in transmission connection with the rotating shaft; An annular chute (42) is further opened on the fixing plate (32). A roller (43) adapted to the annular chute (42) is arranged at the bottom of the guide rail (31). The bottom of the roller (43) abuts against the bottom of the annular chute (42).

5. The UPS power supply automatic temperature control system according to claim 4, characterized in that The control module (50) includes a battery state acquisition unit (44), a coolant circulation strategy unit (45), an execution unit (46) and a flow opening degree model (47); The battery state acquisition unit (44) is configured to acquire the charge and discharge state of the storage battery, and divide the charge and discharge state into a constant current charging state, a constant voltage charging state, a floating charge state, and a discharge state; The coolant circulation strategy unit (45) formulates different coolant circulation strategies based on different charge and discharge states; The execution unit (46) controls the opening and closing of the liquid return pipeline (4), the cooling pipeline (5), or the bypass pipeline based on the coolant circulation strategy; The flow opening model (47) is used to regulate the flow openings of two opening adjustment components, and thereby control the flow ratio of the coolant flowing into the confluence box body (35) from the low-temperature pipe (24) and the high-temperature pipe (25), so that the temperature of the coolant flowing out of the temperature control pipe (41) meets the preset temperature.

6. The UPS power supply automatic temperature control system according to claim 5, characterized in that, The coolant circulation strategies formulated by the coolant circulation strategy unit (45) include: The first circulation path: The coolant enters the battery compartment cooling cavity (17) from the liquid storage tank (1), and circulates in the battery compartment cooling cavity (17) and the functional compartment cooling cavity (18) after meeting the flow requirement; The second circulation path: The coolant enters the battery compartment cooling cavity (17) from the liquid storage tank (1), and circulates in the battery compartment cooling cavity (17), the functional compartment cooling cavity (18), and the liquid storage tank (1) after meeting the flow requirement; The third circulation path: The coolant enters the battery compartment cooling cavity (17) from the liquid storage tank (1), and circulates in the battery compartment cooling cavity (17), the functional compartment cooling cavity (18), and the temperature control box (23) after meeting the flow requirement; In the constant current charging state and the discharge state, the execution unit (46) executes the second circulation path; in the constant voltage charging state, the execution unit (46) executes the first circulation path; in the floating charge state, the execution unit (46) executes the third circulation path based on the output result of the flow opening model (47).

7. The automatic temperature control system for UPS power supply according to claim 6, characterized in that The construction process of the flow opening model (47) is as follows: Set a preset temperature T, acquire the temperature parameters of the second temperature sensor (21) under different states of the storage battery, divide the temperature range based on the maximum and minimum values of the temperature parameters, evenly divide a number of temperature point values within the temperature range, and each temperature point value corresponds to an opening coefficient pair (KA, KB), where KA is the opening coefficient at the inlet end of the low-temperature pipe (24), and KB is the opening coefficient at the inlet end of the high-temperature pipe (25), so that when the opening pair (KA, KB) is used, the temperature parameter of the first temperature sensor (16) is equal to the preset temperature T; acquire a large number of temperature point values and the mapping relationship between the opening coefficient pairs (KA, KB) corresponding to the temperature nodes, mark them through an artificial expert, and after marking, input the temperature point values and the opening coefficient pairs (KA, KB) into the neural network unit for iterative training to obtain the flow opening model (47), so that when the temperature point value is input, the opening coefficient pair (KA, KB) is output, and the temperature parameter of the first temperature sensor (16) is equal to the preset temperature T; The execution unit (46) controls the rotation of the rotation motor (33) to drive the guide rail (31) to rotate based on the opening coefficient pair (KA, KB), so that the plug (27) slides in the confluence port (26) to achieve opening adjustment.

8. The automatic temperature control system for UPS power supply according to claim 7, characterized in that, One end of the guide rail (31) far from the sliding motor (34) is on the same axis as the center of the plug (27). The guide rail (31) is divided into several length point values according to the temperature range, and the length point values correspond to the temperature point values one by one; The length point value is the horizontal distance from the slider (30) to the axis of the plug (27); The execution unit (46) controls the sliding motor (34) at the outlet end of the high-temperature pipe (25) to drive the lead screw (38) to rotate based on the current temperature point value, so as to adjust the position of the slider (30) to the length point value corresponding to the current temperature point value, so as to adjust the sliding stroke of the plug (27) at the outlet end of the high-temperature pipe (25); correct the opening coefficient pair (KA, KB) based on the adjusted sliding stroke.

9. The UPS power supply automatic temperature control system according to claim 8, characterized in that, The control module (50) further includes a threshold setting unit (48) and a temperature compensation unit (49); The threshold setting unit (48) is used to set the operation threshold and warning threshold of the battery compartment cooling chamber (17) and the function compartment cooling chamber (18); The threshold setting unit (48) is connected to the data analysis module (51), and determines the coolant circulation strategy based on the comparison of the temperature distribution map with the operation threshold and the warning threshold: When the temperature of the battery compartment is higher than the operation threshold of the battery compartment, the execution unit (46) executes the first circulation path; When the temperature of the battery compartment is higher than the warning threshold of the battery compartment, the execution unit (46) executes the second circulation path; When the temperature of the function compartment is higher than the operation threshold of the function compartment, the execution unit (46) executes the first circulation path; When the temperature of the function compartment is higher than the warning threshold of the function compartment, the execution unit (46) executes the second circulation path; The temperature compensation unit (49) is configured as follows: when the ambient temperature > 35°C, the operation threshold of the battery compartment is lowered, and when the ambient temperature < 10°C, the operation threshold of the battery compartment is raised.

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