Thermal management method and system for high-rate discharge UPS (Uninterrupted Power Supply) lithium battery module

Abstract

The invention provides a thermal management method and system for a high-rate discharge UPS lithium battery module, and the method comprises the steps: collecting first temperature information and second temperature information of a heat dissipation channel in a UPS; secondly, calculating a difference value between the first temperature information and the second temperature information to obtain first temperature difference information, and setting first output power of the lithium battery module according to the first temperature difference information; then, first target temperature information and second target temperature information are determined according to the second temperature information; and finally, the first refrigeration power is adjusted according to the first temperature information and the first target temperature information, and the first heat conduction power is adjusted according to the second temperature information and the second target temperature information. According to the temperature values of the inlet and the outlet of the thermal management system, the output power of the lithium battery module, the refrigeration condition of the refrigeration system and the heat conduction efficiency of the heat conduction system are adjusted in real time, the thermal management stability of the lithium battery module in the working period is improved, and the use safety of the rate discharge UPS is improved.

Description

Technical Field

[0001] The present invention relates to the field of power supplies, and more specifically, to a thermal management method and system for a high-rate discharge UPS lithium battery module. Background Art

[0002] As a core IT equipment, UPS (Uninterruptible Power Supply) plays a vital role in ensuring the power supply security required for the normal operation of the data center. When the power grid encounters various faults, UPS outputs high-quality power through the configured battery and AC inverter to avoid data loss or task interruption caused by power outage.

[0003] Traditional UPS batteries are lead-acid batteries, but in data center scenarios, they have short cycle life, large volume and weight, and high maintenance costs. As lithium battery technology becomes more and more mature, it has obvious advantages over lead-acid batteries in terms of energy density, cycle life, temperature range, fast charging and discharging capabilities, volume and weight, environmental protection indicators, and intelligent monitoring and management. The market for high-rate discharge UPS lithium battery modules in data center scenarios is becoming more and more widespread. Therefore, there is an urgent need for a thermal management technology for high-rate discharge UPS lithium battery modules that monitors and adjusts the heating status of UPS. Summary of the invention

[0004] In view of the above problems, the purpose of the present invention is to provide a thermal management method and system for a lithium battery module of a high-rate discharge UPS, wherein a temperature difference value is obtained according to a system inlet temperature value and a system outlet temperature value of the thermal management system, and the output power of the lithium battery module is adjusted according to the temperature difference value; in addition, a target temperature of the system inlet and a target temperature of the system outlet are determined according to the system outlet temperature value; the refrigeration power is adjusted according to the system inlet temperature value and the system inlet target temperature; the heat conduction power is adjusted according to the system outlet temperature value and the system outlet target temperature; the present invention adjusts the output power of the lithium battery module, the refrigeration condition of the refrigeration system and the heat conduction efficiency of the heat conduction system in real time according to the temperature values ​​of the inlet and outlet of the thermal management system, thereby improving the stability of the thermal management of the lithium battery module during operation and improving the safety of the use of the high-rate discharge UPS.

[0005] A first aspect of the present invention provides a thermal management method for a high-rate discharge UPS lithium battery module, the method comprising: Acquire first temperature information and second temperature information; Calculating a difference between the second temperature information and the first temperature information to obtain first temperature difference information; adjusting a first output power according to the first temperature difference information; determining first target temperature information and second target temperature information according to the second temperature information; adjusting a first cooling power according to the first temperature information and the first target temperature information; The first thermal power is adjusted according to the second temperature information and the second target temperature information.

[0006] In this solution, adjusting the first output power according to the first temperature difference information is specifically: According to the first temperature difference information, a first temperature difference sequence is obtained in ascending order; According to the first temperature difference sequence, a first ratio sequence is obtained; Acquire first total power information; Calculate the product of the first total power information and the first proportion information of the first proportion sequence to obtain second output power information; Determining whether the second output power information is lower than a preset output power threshold; If yes, determining a first output power according to the first total power information and the first ratio sequence; If not, obtaining second total power information according to the output power threshold and the first total power information; The first output power is adjusted according to the second total power information and the first temperature difference sequence.

[0007] In this solution, adjusting the first output power according to the second total power information and the first temperature difference sequence is specifically: According to the output power threshold, setting first power information; Removing the first temperature difference value of the first temperature difference sequence to obtain a second temperature difference sequence; According to the second temperature difference sequence, a second ratio sequence is obtained; Calculate the product of the second total power information and the second proportion information of the first proportion sequence to obtain third output power information; Determining whether the third output power information is lower than the output power threshold; If yes, adjusting the first output power according to the second total power information and the second ratio sequence; If not, updating the second total power information and the first temperature difference sequence according to the output power threshold; The first output power is adjusted according to the second total power information and the first temperature difference sequence.

[0008] In this solution, the first target temperature information and the second target temperature information are determined according to the second temperature information, specifically: Determining whether the second temperature information exceeds a preset first temperature threshold; If so, the first target temperature information is obtained according to the preset first temperature correspondence table.

[0009] In this solution, the first target temperature information and the second target temperature information are determined according to the second temperature information, specifically: Obtaining first temperature deviation value information according to the second temperature information; Determining whether the first temperature deviation value information exceeds a preset deviation threshold; If so, the second target temperature information is obtained according to the preset second temperature correspondence table.

[0010] In this solution, adjusting the first cooling power according to the first temperature information and the first target temperature information is specifically: Calculating a difference between the first temperature information and the first target temperature information to obtain first deviation value information; According to the first deviation value information, and in accordance with a preset first PID control strategy, obtain refrigeration power adjustment amount information; The first refrigeration power is updated according to the refrigeration power adjustment amount information.

[0011] In this solution, adjusting the first thermal power according to the second temperature information and the second target temperature information is specifically: Calculating a difference between the second temperature information and the second target temperature information to obtain second deviation value information; According to the second deviation value information, and in accordance with a preset second PID control strategy, obtaining heat transfer power adjustment amount information; The first thermal conductivity power is updated according to the thermal conductivity power adjustment amount information.

[0012] A second aspect of the present invention provides a thermal management system for a high-rate discharge UPS lithium battery module, the system comprising: Processor, temperature acquisition module, power output module, heat dissipation management module; The processor adjusts the output power controlled by the power output module and the cooling power and heat conduction power controlled by the heat dissipation management module based on the temperature value collected by the temperature collection module; The temperature acquisition module is used to measure the temperature values ​​of the heat dissipation channel inlet and outlet; The power output module is used to control the power output of the lithium battery module; The heat dissipation management module is used to control the cooling power and heat conduction power of the heat dissipation channel.

[0013] In this solution, the power output module includes: An output voltage regulating unit, used to adjust the output voltage of the lithium battery module; The output current regulating unit is used to adjust the output current of the lithium battery module.

[0014] In this solution, the heat dissipation management module includes: A refrigeration control unit is used to control the refrigeration power so that the temperature of the heat transfer medium reaches the set target temperature; The heat conduction control unit is used to control the heat conduction power, that is, the operating speed of the heat conduction carrier.

[0015] The present invention provides a thermal management method and system for a lithium battery module of a high-rate discharge UPS. First, first temperature information and second temperature information of a heat dissipation channel in the UPS are collected; second, the difference between the first temperature information and the second temperature information is calculated to obtain first temperature difference information, and a first output power of the lithium battery module is set according to the first temperature difference information; then, first target temperature information and second target temperature information are determined according to the second temperature information; finally, the first refrigeration power is adjusted according to the first temperature information and the first target temperature information, and the first heat conduction power is adjusted according to the second temperature information and the second target temperature information; the present invention adjusts the output power of the lithium battery module, the refrigeration condition of the refrigeration system and the heat conduction efficiency of the heat conduction system in real time according to the temperature values ​​of the inlet and outlet of the heat management system, thereby improving the stability of the thermal management of the lithium battery module during operation and improving the safety of the use of the high-rate discharge UPS. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and should not be regarded as limiting the scope.

[0017] Figure 1 A flow chart showing a thermal management method for a high-rate discharge UPS lithium battery module of the present invention is shown; Figure 2 A flow chart of adjusting the first output power provided by an embodiment of the present invention is shown; Figure 3 A schematic diagram of calculating a first output power provided by an embodiment of the present invention is shown; Figure 4 Another schematic diagram of calculating the first output power provided by an embodiment of the present invention is shown; Figure 5 A block diagram of a thermal management system for a high-rate discharge UPS lithium battery module of the present invention is shown. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] Unless otherwise defined, all terms (including technical and scientific terms) used in the embodiments of the present invention have the same meanings as commonly understood by those skilled in the art to which the present invention belongs. It should also be understood that terms such as those defined in common dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless the embodiments of the present invention are explicitly defined in this way.

[0020] The words "first", "second" and similar words used in the embodiments of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "one", "an" or "the" and similar words do not indicate a quantity limitation, but indicate the existence of at least one. Similarly, words such as "include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The steps before or after the method of the embodiment of the present invention are not necessarily carried out in order. On the contrary, various steps can be processed in reverse order or simultaneously. At the same time, other operations can also be added to these processes, or a step or several steps can be removed from these processes.

[0021] In addition, the functional modules in the various embodiments of the present invention may be integrated together to form an independent part, or each module may exist independently, or two or more modules may be integrated to form an independent part.

[0022] Figure 1 A flow chart showing a thermal management method for a high-rate discharge UPS lithium battery module of the present invention.

[0023] like Figure 1 As shown, the first aspect of the present invention discloses a thermal management method for a high-rate discharge UPS lithium battery module, the method comprising: S102, obtaining first temperature information and second temperature information; S104, calculating the difference between the second temperature information and the first temperature information to obtain first temperature difference information; S106, adjusting the first output power according to the first temperature difference information; S108, determining first target temperature information and second target temperature information according to the second temperature information; S110, adjusting a first cooling power according to the first temperature information and the first target temperature information; S112: Adjust the first thermal power according to the second temperature information and the second target temperature information.

[0024] It should be noted that the first temperature information is the inlet temperature value of the heat dissipation channel in the heat dissipation system of the UPS; the first temperature information is the outlet temperature value of the heat dissipation channel in the heat dissipation system of the UPS; the first output power is the power supply output power of the lithium battery module; the first target temperature information is the target temperature value of the inlet of the heat dissipation channel in the heat dissipation system of the UPS; the second target temperature information is the target temperature value of the outlet of the heat dissipation channel in the heat dissipation system of the UPS; the first cooling power is the cooling working power of the refrigerator in the heat dissipation system; the first thermal conductivity power is the thermal conductivity working power in the heat dissipation system, and the thermal conduction method includes air cooling or water cooling. In addition, UPS is usually composed of a plurality of lithium battery modules stacked together, and each lithium battery module provides a set power to form the power supply required to meet the normal operation of the data center. In the application of the present invention, at least two heat dissipation systems are included, and one or more lithium batteries are arranged in each heat dissipation system.

[0025] In this embodiment, first, the temperature values ​​of the inlet and outlet of the heat dissipation channel in the heat dissipation system are collected; wherein, the temperature value of the heat dissipation inlet can represent the output state of the refrigerator, and the temperature value of the heat dissipation outlet can represent the output state of the heat conduction channel after the lithium battery module is heat-conducted. By calculating the difference between the temperature values ​​of the inlet and outlet of the heat dissipation channel, that is, the first temperature difference information, the heat transfer of the heat dissipation channel can be represented. Under the same cooling and heat conduction conditions, the larger the first temperature difference information, the more obvious the heating of the lithium battery module, and the higher the temperature value. According to the temperature difference of each heat dissipation channel, the first output power of the lithium battery module of each channel is set respectively to balance the heating of the lithium battery module in each heat dissipation channel; that is, while meeting the power supply demand of the UPS, the power supply power of each lithium battery module is adjusted, thereby adjusting the heating of the lithium battery module. Then, according to the second temperature information, the preset target temperature correspondence table is searched to obtain the first target temperature information and the second target temperature information, that is, the target temperature value of the heat dissipation channel inlet and the target temperature value of the heat dissipation channel outlet. Finally, according to the first temperature information and the first target temperature information, the first cooling power is determined and adjusted according to the set control and adjustment strategy; according to the second temperature information and the second target temperature information, the first thermal power is determined and adjusted according to the set control and adjustment strategy. Through the control and adjustment strategy, the temperature values ​​at the inlet and outlet of the heat dissipation channel are stabilized within the set target temperature value range, thereby ensuring that the lithium battery operates within a safe temperature range. This embodiment adjusts the output power of the lithium battery module, the cooling condition of the refrigeration system, and the thermal conductivity efficiency of the thermal conduction system in real time according to the temperature values ​​at the inlet and outlet of the thermal management system, thereby improving the stability of the thermal management of the lithium battery module during operation and improving the safety of the use of the rate discharge UPS.

[0026] Figure 2 A flow chart of adjusting the first output power provided by an embodiment of the present invention is shown.

[0027] According to an embodiment of the present invention, Figure 2 As shown, the first output power is adjusted according to the first temperature difference information, specifically: S202, obtaining a first temperature difference sequence according to the first temperature difference information in ascending order; S204, obtaining a first ratio sequence according to the first temperature difference sequence; S206, obtaining first total power information; S208, calculating the product of the first total power information and the first proportion information of the first proportion sequence to obtain second output power information; S210, determining whether the second output power information is lower than a preset output power threshold; S212: If yes, determining a first output power according to the first total power information and the first ratio sequence; S214, if not, obtaining second total power information according to the output power threshold and the first total power information; S202: Adjust the first output power according to the second total power information and the first temperature difference sequence.

[0028] It should be noted that the first temperature difference sequence is a sequence obtained by arranging the temperature difference values ​​between the outlet temperature and the inlet temperature of each heat dissipation channel in ascending order; the first proportion sequence is the output power ratio calculated according to the temperature difference value in a preset calculation method; the first total power information is the output power value required for UPS power supply; the second output power information is the theoretical output power requirement value of the lithium battery module in the heat dissipation channel; the output power threshold is the actual output power of the lithium battery; the second total power information is the output power value required for UPS power supply after excluding the lithium battery power supply power of at least one heat dissipation channel.

[0029] In actual applications, the output power of a lithium battery module usually exceeds the rated value by 5%-10%. For example, if the rated output power of a lithium battery module is 100, the actual output power is 105 to 110. As an implementation method, assume that the UPS is provided with 4 heat dissipation channels, each heat dissipation channel is provided with 1 lithium battery module, the rated output power value of each lithium battery module is 100, the actual value is 110, and the target power provided by the UPS is 400. Figure 3 As shown, Figure 3A schematic diagram of calculating a first output power provided by an embodiment of the present invention is shown. First, according to the first temperature difference information, a first temperature difference sequence [2, 2, 3, 3] is obtained. Secondly, according to the preset output ratio calculation method, a first ratio sequence [26.7%, 26.7%, 23.3%, 23.3%] is obtained to calculate the power value that the lithium battery module of each heat dissipation channel needs to output, that is, the second power information (106.8, 106.8, 93.2, 93.2). Then, according to the order of the first temperature difference sequence, the corresponding second output power is compared with the preset output power threshold 110 in sequence. When the second power information is less than the output power threshold, it means that the output of the lithium battery module can meet the requirements of the calculated value, and the first output power is set according to the second output power, that is, the first output power of the lithium battery module of each heat dissipation channel is (106.8, 106.8, 93.2, 93.2). When the second power information is not lower than the output power threshold, the first output power of the lithium battery module of the corresponding channel is set according to the output power threshold in the order of the first temperature difference sequence, and the remaining power supply demand power value, that is, the second total power information, is calculated. Finally, the second temperature difference sequence is obtained according to the temperature difference value of the remaining heat dissipation channel.

[0030] According to an embodiment of the present invention, adjusting the first output power according to the second total power information and the first temperature difference sequence is specifically: According to the output power threshold, setting first power information; Removing the first temperature difference value of the first temperature difference sequence to obtain a second temperature difference sequence; According to the second temperature difference sequence, a second ratio sequence is obtained; Calculate the product of the second total power information and the second proportion information of the first proportion sequence to obtain third output power information; Determining whether the third output power information is lower than the output power threshold; If yes, adjusting the first output power according to the second total power information and the second ratio sequence; If not, updating the second total power information and the first temperature difference sequence according to the output power threshold; The first output power is adjusted according to the second total power information and the first temperature difference sequence.

[0031] It should be noted that, as an implementation method, it is assumed that the UPS is provided with 4 groups of heat dissipation channels, each group of heat dissipation channels is provided with a lithium battery module, the output power calibration value of each lithium battery module is 100, the actual value is 110, and the target power provided by the UPS is 400. Figure 4 As shown, Figure 4Another schematic diagram of calculating the first output power provided by an embodiment of the present invention is shown. Assuming the first temperature difference sequence is [1,2,5,8], according to the calculation method above, the second power information (125.2,116.8,91.6,66.8) can be obtained. Since the power supply power 125.2 required by the first heat dissipation channel exceeds the set output power threshold 110, the first power information of the first heat dissipation channel is set to 110, and the power supply power required by the remaining channels is 290. The second temperature difference sequence obtained after removing the first heat dissipation channel is [2,5,8]. According to the set calculation method, the third output power corresponding to the second temperature difference sequence [2,5,8] is (128.5,96.6,64.7). According to the above method, since the power supply power 128.5 required by the second heat dissipation channel exceeds the set output power threshold 110. Therefore, the first power information of the second heat dissipation channel is set to 110, and the power supply power required by the remaining channels is 180. The second temperature difference sequence obtained after removing the second heat dissipation channel is [5,8]. By analogy, the power output power of the four heat dissipation channels can be obtained (110, 110, 110, 70). This embodiment ensures that the lithium battery module of the heat dissipation channel with the highest temperature difference is powered at the lowest power, thereby preventing its temperature from continuously rising due to high output power and improving the safety of the lithium battery module.

[0032] According to an embodiment of the present invention, determining the first target temperature information and the second target temperature information according to the second temperature information is specifically: Determining whether the second temperature information exceeds a preset first temperature threshold; If so, the first target temperature information is obtained according to the preset first temperature correspondence table.

[0033] It should be noted that when the temperature value at the heat dissipation channel outlet is higher than the set first temperature threshold, it means that it is necessary to reduce the temperature value at the heat dissipation channel inlet to achieve the purpose of rapid cooling. According to the second temperature information, the preset first temperature corresponding table is searched to obtain the first target temperature information as the target value at the heat dissipation channel inlet to adjust the cooling work of the refrigerator.

[0034] According to an embodiment of the present invention, determining the first target temperature information and the second target temperature information according to the second temperature information is specifically: Obtaining first temperature deviation value information according to the second temperature information; Determining whether the first temperature deviation value information exceeds a preset deviation threshold; If so, the second target temperature information is obtained according to the preset second temperature correspondence table.

[0035] It should be noted that the first temperature deviation value information is the deviation value of the second temperature information of each heat dissipation channel, that is, the difference between the maximum value and the minimum value of the second temperature information of each heat dissipation channel. When the first temperature deviation information exceeds the preset deviation threshold, it means that the temperature difference between each channel is large, and it is necessary to adjust the thermal conductivity of each channel to balance the temperature value of each channel outlet. If it is an air-cooled heat conduction system, adjust the air volume; if it is a water-cooled heat conduction system, adjust the coolant flow rate. According to the second temperature information, the preset second temperature correspondence table is searched to obtain the second target temperature information as the target value of the heat dissipation channel outlet to adjust the thermal conduction work of the heat conduction system.

[0036] According to an embodiment of the present invention, adjusting the first cooling power according to the first temperature information and the first target temperature information is specifically: Calculating a difference between the first temperature information and the first target temperature information to obtain first deviation value information; According to the first deviation value information, and in accordance with a preset first PID control strategy, obtain refrigeration power adjustment amount information; The first refrigeration power is updated according to the refrigeration power adjustment amount information.

[0037] It should be noted that, in this embodiment, according to the difference between the temperature value at the entrance of the heat dissipation channel and the entrance target temperature value, that is, the first deviation value information, the refrigeration power adjustment amount information is obtained according to the preset first PID control strategy. The first refrigeration power is updated according to the refrigeration power adjustment amount information. The first refrigeration power is adjusted by PID control adjustment so that the temperature value at the entrance of the heat dissipation channel can be quickly and stably maintained at the set target temperature value.

[0038] According to an embodiment of the present invention, adjusting the first thermal power according to the second temperature information and the second target temperature information is specifically: Calculating a difference between the second temperature information and the second target temperature information to obtain second deviation value information; According to the second deviation value information, and in accordance with a preset second PID control strategy, obtaining heat transfer power adjustment amount information; The first thermal conductivity power is further refined according to the thermal conductivity power adjustment amount information.

[0039] It should be noted that, in this embodiment, according to the difference between the temperature value at the outlet of the heat dissipation channel and the outlet target temperature value, that is, the second deviation value information, the thermal power adjustment amount information is obtained according to the preset second PID control strategy. The first thermal power is updated by the thermal power adjustment amount information. The first thermal power is adjusted by PID control adjustment so that the temperature value at the outlet of the heat dissipation channel can be quickly and stably maintained at the set target temperature value.

[0040] It is worth mentioning that it also includes: According to the first target temperature information, adjusting the first control amount weight of the first PID control strategy according to a first weight correspondence table; According to the second target temperature information, the second control amount weight of the second PID control strategy is adjusted according to a second weight correspondence table.

[0041] It should be noted that due to the hysteresis of heat transfer, the use of variable control quantity weights in the PID control strategy is conducive to improving the efficiency and stability of the temperature reaching the target temperature. In this embodiment, according to the target temperature values ​​of the heat dissipation channel inlet and outlet, the weight correspondence table is searched respectively to obtain the first control quantity weight of the first PID control strategy and the second control quantity weight of the second PID control strategy. Thereby improving the efficiency and stability of temperature regulation.

[0042] It is worth mentioning that it also includes: Get cooling mode information; The first weight correspondence table or the second weight correspondence table is adjusted according to the cooling mode information.

[0043] It should be noted that in this embodiment, the heat dissipation system is an air cooling system or a water cooling system. The air cooling system uses flowing cold air as a heat conduction carrier to achieve the purpose of heat dissipation for the device; the water cooling system uses flowing liquid as a heat conduction carrier to achieve the purpose of heat dissipation for the device. Due to the different thermal conductivity coefficients of the heat conduction carriers, this embodiment adjusts the corresponding first weight correspondence table or the second weight correspondence table according to the heat dissipation system used, thereby improving the adaptability of the PID control adjustment.

[0044] It is worth mentioning that it also includes: Determining whether the second temperature information exceeds a preset second temperature threshold; If so, the first cooling power is set according to the preset cooling power threshold, and the first thermal conductivity power is set according to the preset thermal conductivity power threshold.

[0045] It should be noted that when the temperature value at the heat dissipation channel outlet exceeds the preset second temperature threshold, it means that the heat of the lithium battery module in the heat dissipation channel is too high, and there is a risk of shortening the battery life or even overheating damage. At this time, the cooling power and thermal power are both set to the maximum value, so that the lithium battery module in the current heat dissipation channel can be cooled quickly, which plays a role in protecting the lithium battery module.

[0046] Figure 5 A block diagram of a thermal management system for a high-rate discharge UPS lithium battery module of the present invention is shown.

[0047] like Figure 5 As shown, the second aspect of the present invention discloses a thermal management system for a high-rate discharge UPS lithium battery module, the system comprising: Processor 501, temperature acquisition module 502, power output module 503, heat dissipation management module 504; The processor 501 adjusts the output power controlled by the power output module and the cooling power and heat conduction power controlled by the heat dissipation management module for the temperature value collected by the temperature collection module; The temperature acquisition module 502 is used to measure the temperature values ​​of the heat dissipation channel inlet and outlet; The power output module 503 is used to control the power output of the lithium battery module; The heat dissipation management module 504 is used to control the cooling power and heat conduction power of the heat dissipation channel.

[0048] It should be noted that the processor, as the data processing center and control center of the UPS thermal management system, is used to obtain the temperature value collected by the temperature acquisition module, and execute the corresponding calculation and control strategy according to the temperature value, so as to adjust the power output power of the lithium battery module controlled by the power output module, control the cooling power of the refrigerator controlled by the heat dissipation management module, and control the thermal power of the heat conduction system controlled by the heat dissipation management module. The temperature acquisition module measures the temperature values ​​at the inlet and outlet of the heat dissipation channel, and each heat dissipation channel includes at least one inlet temperature sensor and one outlet temperature sensor. The power output module controls the power output power of the lithium battery module, and adjusts the actual power supply power of the lithium battery module according to the set output power value to meet the power supply work of the UPS. The heat dissipation management module controls the cooling power and thermal power of the heat dissipation channel, wherein the cooling power is used to adjust the temperature value of the heat conduction carrier, and the thermal power is used to adjust the running speed of the heat conduction carrier.

[0049] According to an embodiment of the present invention, the electric energy output module includes: An output voltage regulating unit, used to adjust the output voltage of the lithium battery module; The output current regulating unit is used to adjust the output current of the lithium battery module.

[0050] It should be noted that the power output module includes an output voltage adjustment unit and an output current adjustment unit, which respectively control the output voltage and output current of the lithium battery module, thereby adjusting the power supply power of the lithium battery module.

[0051] According to an embodiment of the present invention, the heat dissipation management module includes: A refrigeration control unit is used to control the refrigeration power so that the temperature of the heat transfer medium reaches the set target temperature; The heat conduction control unit is used to control the heat conduction power, that is, the operating speed of the heat conduction carrier.

[0052] It should be noted that the refrigeration control unit is usually a refrigerator, which is used to adjust the temperature value of the heat transfer medium. In an air-cooled system, the temperature value of the air is adjusted; in a water-cooled system, the temperature value of the coolant is adjusted. The heat transfer control unit is a device that controls the running speed of the heat transfer medium. In an air-cooled system, it is usually a blower to adjust the air volume; in a water-cooled system, it is usually a water pump to adjust the flow rate of the coolant.

[0053] The present invention provides a thermal management method and system for a lithium battery module of a high-rate discharge UPS. First, first temperature information and second temperature information of a heat dissipation channel in the UPS are collected; second, the difference between the first temperature information and the second temperature information is calculated to obtain first temperature difference information, and a first output power of the lithium battery module is set according to the first temperature difference information; then, first target temperature information and second target temperature information are determined according to the second temperature information; finally, the first refrigeration power is adjusted according to the first temperature information and the first target temperature information, and the first heat conduction power is adjusted according to the second temperature information and the second target temperature information; the present invention adjusts the output power of the lithium battery module, the refrigeration condition of the refrigeration system and the heat conduction efficiency of the heat conduction system in real time according to the temperature values ​​of the inlet and outlet of the heat management system, thereby improving the stability of the thermal management of the lithium battery module during operation and improving the safety of the use of the high-rate discharge UPS.

[0054] If the functions are implemented in the form of software function modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, and other media that can store program codes.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A thermal management method for a high-rate discharge UPS lithium battery module, characterized in that: The method comprises: Acquire first temperature information and second temperature information; Calculating a difference between the second temperature information and the first temperature information to obtain first temperature difference information; adjusting a first output power according to the first temperature difference information; determining first target temperature information and second target temperature information according to the second temperature information; adjusting a first cooling power according to the first temperature information and the first target temperature information; The first thermal power is adjusted according to the second temperature information and the second target temperature information.

2. The thermal management method for a high-rate discharge UPS lithium battery module according to claim 1, characterized in that: The adjusting the first output power according to the first temperature difference information is specifically: According to the first temperature difference information, a first temperature difference sequence is obtained in ascending order; According to the first temperature difference sequence, a first ratio sequence is obtained; Acquire first total power information; Calculate the product of the first total power information and the first proportion information of the first proportion sequence to obtain second output power information; Determining whether the second output power information is lower than a preset output power threshold; If yes, determining a first output power according to the first total power information and the first ratio sequence; If not, obtaining second total power information according to the output power threshold and the first total power information; The first output power is adjusted according to the second total power information and the first temperature difference sequence.

3. The thermal management method for a high-rate discharge UPS lithium battery module according to claim 2, characterized in that: The adjusting the first output power according to the second total power information and the first temperature difference sequence is specifically: According to the output power threshold, setting first power information; Removing the first temperature difference value of the first temperature difference sequence to obtain a second temperature difference sequence; According to the second temperature difference sequence, a second ratio sequence is obtained; Calculate the product of the second total power information and the second proportion information of the first proportion sequence to obtain third output power information; Determining whether the third output power information is lower than the output power threshold; If yes, adjusting the first output power according to the second total power information and the second ratio sequence; If not, updating the second total power information and the first temperature difference sequence according to the output power threshold; The first output power is adjusted according to the second total power information and the first temperature difference sequence.

4. The thermal management method for a high-rate discharge UPS lithium battery module according to claim 1, characterized in that: The determining the first target temperature information and the second target temperature information according to the second temperature information is specifically: Determining whether the second temperature information exceeds a preset first temperature threshold; If so, the first target temperature information is obtained according to the preset first temperature correspondence table.

5. The thermal management method for a high-rate discharge UPS lithium battery module according to claim 1, characterized in that: The determining the first target temperature information and the second target temperature information according to the second temperature information is specifically: Obtaining first temperature deviation value information according to the second temperature information; Determining whether the first temperature deviation value information exceeds a preset deviation threshold; If so, the second target temperature information is obtained according to the preset second temperature correspondence table.

6. The thermal management method for a high-rate discharge UPS lithium battery module according to claim 1, characterized in that: The adjusting the first cooling power according to the first temperature information and the first target temperature information is specifically: Calculating a difference between the first temperature information and the first target temperature information to obtain first deviation value information; According to the first deviation value information, and in accordance with a preset first PID control strategy, obtain refrigeration power adjustment amount information; The first refrigeration power is updated according to the refrigeration power adjustment amount information.

7. The thermal management method for a high-rate discharge UPS lithium battery module according to claim 1, characterized in that: The adjusting the first thermal power according to the second temperature information and the second target temperature information is specifically: Calculating a difference between the second temperature information and the second target temperature information to obtain second deviation value information; According to the second deviation value information, and in accordance with a preset second PID control strategy, obtaining heat transfer power adjustment amount information; The first thermal conductivity power is updated according to the thermal conductivity power adjustment amount information.

8. A thermal management system for a high-rate discharge UPS lithium battery module, applied to a thermal management method for a high-rate discharge UPS lithium battery module as claimed in any one of claims 1 to 7, characterized in that: The system comprises: Processor, temperature acquisition module, power output module, heat dissipation management module; The processor adjusts the output power controlled by the power output module and the cooling power and heat conduction power controlled by the heat dissipation management module based on the temperature value collected by the temperature collection module; The temperature acquisition module is used to measure the temperature values ​​of the heat dissipation channel inlet and outlet; The power output module is used to control the power output of the lithium battery module; The heat dissipation management module is used to control the cooling power and heat conduction power of the heat dissipation channel.

9. A thermal management system for a high-rate discharge UPS lithium battery module according to claim 8, characterized in that: The electric energy output module comprises: An output voltage regulating unit, used to adjust the output voltage of the lithium battery module; The output current regulating unit is used to adjust the output current of the lithium battery module.

10. The thermal management system of a high-rate discharge UPS lithium battery module according to claim 8, characterized in that: The heat dissipation management module comprises: A refrigeration control unit is used to control the refrigeration power so that the temperature of the heat transfer medium reaches the set target temperature; The heat conduction control unit is used to control the heat conduction power, that is, the operating speed of the heat conduction carrier.

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