A high-rate, short-time discharge UPS battery circuit and control method

Abstract

The present invention provides a high-rate, short-time discharge UPS battery circuit and control method. The discharge circuit of the lithium battery UPS is composed of several first lithium battery modules, a power supply bus, a communication bus, and a processor. The first lithium battery module is composed of several battery core modules connected in series. After voltage regulation and current limiting, the supply current is connected in parallel to the power supply bus, thereby improving the short-time load capacity of the UPS. The high-rate, short-time discharge UPS battery control method is also used to adjust the output voltage of each battery core and the supply current of each lithium battery module in real time according to the temperature information and power information of the battery core, thereby improving the use safety of the UPS while meeting the discharge requirements. In addition, by balancing the output of each battery core, the service life of the UPS is extended.

Description

Technical Field

[0001] The present invention belongs to the field of power supply control, and more specifically discloses a high-rate short-time discharge UPS battery circuit and a control method. Background Art

[0002] As a core IT device, the UPS (Uninterruptible Power Supply) plays a crucial role in ensuring the power supply security required for the normal operation of data centers. When the power grid encounters various faults, the UPS uses its configured batteries to convert AC power into high-quality power, thereby preventing data loss or task interruption caused by power outages.

[0003] In short-term, high-power discharge scenarios, such as those used in data centers, traditional lead-acid battery UPSs suffer from bulkiness, short cycle life, and high maintenance costs. However, lithium battery UPSs, which offer high-rate, short-duration discharge, offer high output power and compact size in data center applications. Highly reliable high-rate, short-duration UPS battery technology will help improve the market competitiveness of lithium battery UPSs. Summary of the Invention

[0004] In view of the above problems, the purpose of the present invention is to provide a high-rate short-time discharge UPS battery circuit and control method. The discharge circuit of the lithium battery UPS is composed of several first lithium battery modules, a power supply bus, a communication bus and a processor. The first lithium battery module is composed of several battery cell modules connected in series. After voltage regulation and current limiting, the supply current is connected in parallel to the power supply bus, thereby improving the short-time load capacity of the UPS; the high-rate short-time discharge UPS battery control method is also used to adjust the output voltage of each battery cell and the supply current of each lithium battery module in real time, thereby improving the safety of UPS use while meeting the discharge requirements; in addition, by balancing the output of each battery cell, the service life of the UPS is extended.

[0005] In order to achieve the above objectives, the first aspect of the present invention provides a high-rate, short-time discharge UPS battery circuit, the circuit comprising:

[0006] At least two first lithium battery modules, a power supply bus, a communication bus and a processor;

[0007] The first lithium battery module includes: a first battery cell, a first state detection module, a first output control module, a first DC bus and a first current regulation unit;

[0008] The first battery cell is a lithium battery cell, which is used to store and release electrical energy;

[0009] The first state detection module is used to detect the working state information of the first battery cell, and then transmit the working state information to the processor through the communication bus;

[0010] The first output control module is used to control the power supply conduction state of the first battery cell and the power supply output voltage of the first battery cell;

[0011] The first DC bus is used to transmit the power supply current of the first lithium battery module;

[0012] The first current regulating unit is used to regulate the supply current of the first lithium battery module, and the output is connected to the power supply bus;

[0013] The power supply bus is the power supply output end of the UPS;

[0014] The communication bus is a communication carrier for transmitting communication or control signals between the processor and the first lithium battery module;

[0015] The processor is used to obtain the working status information of the first lithium battery module through the communication bus, and then adjust the power supply status of the first lithium battery module through the communication bus.

[0016] In this solution, the first status detection module specifically includes:

[0017] Power detection unit and temperature detection unit;

[0018] The power detection unit is a power detection circuit, configured to detect the remaining power value of the first battery cell and transmit the power value to the processor via the communication bus;

[0019] The temperature detection unit is a temperature detection circuit or a temperature sensor, which is used to detect the operating temperature value of the first battery cell and transmit the temperature value to the processor through the communication bus.

[0020] In this solution, the first output control module specifically includes:

[0021] conduction selection unit and voltage regulation unit;

[0022] The common end of the conduction selection unit is connected to the input port of the first DC bus, the first end of the conduction selection unit is connected to the first battery cell, and the second end of the conduction selection unit is connected to the output port of the first DC bus;

[0023] The voltage regulating unit is a voltage regulating circuit, which is used to adjust the power supply output voltage of the first battery cell. The input end of the voltage regulating circuit is connected to the first battery cell, and the output end of the voltage regulating circuit is connected to the input and output of the first DC bus.

[0024] In this solution, the first current regulating unit is specifically:

[0025] a current limiting circuit, configured to regulate the supply current output by the first lithium battery module;

[0026] The input end of the current limiting circuit is connected to the output end of the first DC bus;

[0027] The output end of the current limiting circuit is connected in parallel to the power supply bus.

[0028] A second aspect of the present invention further provides a high-rate, short-time discharge UPS battery control method, which is applied to any of the above-mentioned high-rate, short-time discharge UPS battery circuits. The method specifically includes:

[0029] obtaining first temperature information;

[0030] determining first current upper limit information according to the first temperature information;

[0031] Acquiring first power information, first voltage information, and first time information;

[0032] determining second current upper limit information according to the first power information, the first voltage information, and the first time information;

[0033] determining whether the second current upper limit information is lower than the first current upper limit information;

[0034] If yes, modifying the first current upper limit information according to the second current upper limit information;

[0035] acquiring first current information;

[0036] determining second current information according to the first current information and the first current upper limit information;

[0037] The first current regulating unit is adjusted according to the second current information.

[0038] In this solution, the second current information is determined according to the first current information and the first current upper limit information, specifically:

[0039] Obtaining third current upper limit information according to the sum of the first current upper limit information;

[0040] determining whether the first current information is greater than the third current upper limit information;

[0041] If not, the second current information is set to 0, and a first abnormal instruction is sent to the background;

[0042] If yes, obtaining a first power sequence according to the first power information and a set sorting method;

[0043] Second current information is determined according to the first current information and the first electrical quantity sequence.

[0044] In this solution, the second current information is determined according to the first current information and the first power sequence, specifically:

[0045] obtaining third current information according to the first current information;

[0046] obtaining first ratio information according to the first power sequence;

[0047] Based on the first electrical quantity sequence, obtaining second current information according to the third current information and the first ratio information;

[0048] determining whether the second current information exceeds the first current upper limit information;

[0049] If yes, setting the second current information according to the first current upper limit information;

[0050] updating the third current information according to the second current information;

[0051] Determining whether the third current information is 0;

[0052] If yes, then the second current information confirmation process ends;

[0053] If not, second current information is determined according to the third current information and the first electrical quantity sequence.

[0054] This plan also includes:

[0055] obtaining second voltage information;

[0056] determining whether the second voltage information is greater than the first voltage information;

[0057] If not, the first current upper limit information is set to 0, and the conduction selection unit is switched to the second conduction state;

[0058] If yes, obtaining second power information;

[0059] According to the second power information, the conduction state of the conduction selection unit is switched and the voltage regulation unit is adjusted.

[0060] In this solution, switching the conduction state of the conduction selection unit and adjusting the voltage regulation unit according to the second power information are specifically:

[0061] Obtaining a second power sequence according to the second power information and a set sorting method;

[0062] Obtaining third voltage information according to the second electrical quantity sequence and the first voltage information;

[0063] Determining whether the third voltage information exceeds a preset first voltage threshold;

[0064] If so, switching the conduction selection unit to the first conduction state and adjusting the voltage regulation unit according to the third voltage information;

[0065] If not, the conduction selection unit is switched to the second conduction state, and the second power sequence is adjusted and updated.

[0066] In this solution, the third voltage information is obtained according to the second power sequence and the first voltage information, specifically:

[0067] obtaining fourth voltage information according to the first voltage information;

[0068] extracting the second power information of the second power sequence in sequence according to a preset order;

[0069] Determining whether the second power information exceeds a preset first power threshold;

[0070] If not, obtaining second ratio information according to the second electrical quantity sequence;

[0071] Based on the second power sequence, obtaining third voltage information according to the fourth voltage information and the second ratio information;

[0072] If yes, determining whether the fourth voltage information exceeds a preset second voltage threshold;

[0073] If not, setting the third voltage information according to the fourth voltage information, and ending the setting process of the third voltage information;

[0074] If so, the third voltage information is set according to a preset second voltage threshold, and the fourth voltage information is updated according to a difference between the fourth voltage information and the second voltage threshold.

[0075] The present invention provides a high-rate, short-time discharge UPS battery circuit and control method. The discharge circuit of the lithium battery UPS is composed of several first lithium battery modules, a power supply bus, a communication bus, and a processor. The first lithium battery module is composed of several battery core modules connected in series. After voltage regulation and current limiting, the supply current is connected in parallel to the power supply bus, thereby improving the short-time load capacity of the UPS. The high-rate, short-time discharge UPS battery control method is also used to adjust the output voltage of each battery core and the supply current of each lithium battery module in real time according to the temperature information and power information of the battery core, thereby improving the use safety of the UPS while meeting the discharge requirements. In addition, by balancing the output of each battery core, the service life of the UPS is extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0076] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope.

[0077] Figure 1 Shows a connection diagram of a high-rate, short-time discharge UPS battery circuit;

[0078] Figure 2 FIG2 shows a circuit diagram of a first state detection module provided by an embodiment of the present invention;

[0079] Figure 3 A circuit diagram of a first output control module provided in an embodiment of the present invention is shown;

[0080] Figure 4 A schematic diagram showing a method for controlling a UPS battery with a high rate and short time discharge is shown;

[0081] Figure 5 A flowchart of determining second current information provided by an embodiment of the present invention is shown;

[0082] Figure 6 A flowchart of confirming third voltage information provided by an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0083] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0084] Unless otherwise defined, all terms (including technical and scientific terms) used in the embodiments of the present invention have the same meaning 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 explicitly defined in this manner in the embodiments of the present invention.

[0085] The words "first", "second" and similar terms 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" do not indicate a quantity limitation, but rather indicate the existence of at least one. Similarly, words such as "include" or "comprise" mean that the elements or objects preceding the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" 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 do not necessarily have to be performed in exact order. On the contrary, the various steps may be processed in reverse order or simultaneously. At the same time, other operations may be added to these processes, or one or more steps may be removed from these processes.

[0086] Please refer to Figure 1 , Figure 1 The figure shows a connection diagram of a UPS battery circuit with a high rate and short time discharge.

[0087] like Figure 1 As shown, the first aspect of the present invention discloses the high-rate short-time discharge UPS battery circuit, which includes:

[0088] At least two first lithium battery modules 103, a power supply bus 109, a communication bus 102 and a processor 101;

[0089] The first lithium battery module 103 includes: a first battery cell 104, a first state detection module 105, a first output control module 106, a first DC bus 107 and a first current regulation unit 108;

[0090] The first battery cell is a lithium battery cell, which is used to store and release electrical energy;

[0091] The first state detection module is used to detect the working state information of the first battery cell, and then transmit the working state information to the processor through the communication bus;

[0092] The first output control module is used to control the power supply conduction state of the first battery cell and the power supply output voltage of the first battery cell;

[0093] The first DC bus is used to transmit the power supply current of the first lithium battery module;

[0094] The first current regulating unit is used to regulate the supply current of the first lithium battery module, and the output is connected to the power supply bus;

[0095] The power supply bus is the power supply output end of the UPS;

[0096] The communication bus is a communication carrier for transmitting communication or control signals between the processor and the first lithium battery module;

[0097] The processor is used to obtain the working status information of the first lithium battery module through the communication bus, and then adjust the power supply status of the first lithium battery module through the communication bus.

[0098] It should be noted that a high-rate, short-duration UPS achieves this by connecting several lithium-ion battery modules in parallel to achieve a superimposed supply current. Lithium-ion battery modules achieve this by connecting several cell modules in series to achieve a superimposed supply voltage. In practice, 16 cell modules are connected in series to form a single lithium-ion battery module, represented by a 16S1P configuration. Ten 16S1P lithium-ion battery modules can achieve a continuous output of 250kW and guarantee a backup time of more than five minutes. Redundancy is also employed to improve fault tolerance, with 11-12 16S1P lithium-ion battery modules installed in the battery cabinet.

[0099] In this embodiment, a processor collects operating status information of a lithium battery module via a communication bus, including but not limited to cell charge, cell temperature, and heat dissipation status. The processor controls the supply voltage and current of the lithium battery module via the communication bus to meet the demands of the power load. The communication bus comprises at least one bus group. In one embodiment, the processor collects status information of the lithium battery module via one data bus group and controls the output of the lithium battery module via another control bus group. A first lithium battery module includes multiple cell modules connected in series, each including a first cell, a first status detection module, and a first output control module. The first cell is a lithium battery cell that stores and releases electrical energy. The first status detection module detects operating status information of the first cell, including but not limited to cell charge and cell temperature, and transmits the operating status information to the processor via the communication bus. The first output control module controls the power supply conduction state and supply voltage of the first cell. When the first cell is in the power supply conduction state, the output voltage of the first cell is connected in series to a first DC bus. When the first cell is in the power supply disconnection state, the first DC bus does not pass through the first cell. The first DC bus of the first lithium battery module aggregates the supply voltage of the first battery cell. The first current regulation unit then regulates the supply current of the first lithium battery module, allowing the first lithium battery module to merge its supply energy into the power bus. The power bus aggregates the power of multiple first lithium battery modules for use as the power output of the UPS.

[0100] Please refer to Figure 2 , Figure 2 A circuit diagram of a first state detection module provided by an embodiment of the present invention is shown.

[0101] According to an embodiment of the present invention, Figure 2 As shown, the first state detection module specifically includes:

[0102] A power detection unit 201 and a temperature detection unit 202;

[0103] The power detection unit is a power detection circuit, configured to detect the remaining power value of the first battery cell and transmit the power value to the processor via the communication bus;

[0104] The temperature detection unit is a temperature detection circuit or a temperature sensor, which is used to detect the operating temperature value of the first battery cell and transmit the temperature value to the processor through the communication bus.

[0105] It should be noted that the power detection unit is a power detection circuit. As one embodiment, the power value of the battery cell is determined by detecting the voltage value across the battery cell. After obtaining the power value of the battery cell, the power value is transmitted to the processor via a communication bus. The temperature detection unit is a temperature detection circuit or temperature sensor. As one embodiment, a thermistor voltage divider circuit is used as the temperature detection circuit. By detecting the resistance of the thermistor, the temperature value is represented in the form of an analog-to-digital conversion value and transmitted to the processor. As another embodiment, a temperature sensor, such as a DS18B20, is used. The processor reads the temperature value of the temperature sensor via the communication bus according to the set communication instructions.

[0106] Please refer to Figure 3 , Figure 3 A circuit diagram of a first output control module provided in an embodiment of the present invention is shown.

[0107] According to an embodiment of the present invention, Figure 3 As shown, the first output control module specifically includes:

[0108] Conducting selection unit 301 and voltage adjustment unit 302;

[0109] The common end of the conduction selection unit is connected to the input port of the first DC bus, the first end of the conduction selection unit is connected to the first battery cell, and the second end of the conduction selection unit is connected to the output port of the first DC bus;

[0110] The voltage regulating unit is a voltage regulating circuit, which is used to adjust the power supply output voltage of the first battery cell. The input end of the voltage regulating circuit is connected to the first battery cell, and the output end of the voltage regulating circuit is connected to the input and output of the first DC bus.

[0111] It should be noted that the conduction selection unit has two conduction states: a first conduction state indicating a power-on state in which the first battery cell is connected in series to the first DC bus, and a second conduction state indicating a power-off state in which the first DC bus does not pass through the first battery cell. The voltage regulation unit is a voltage regulating circuit that, when in the power-on state, causes the first battery cell to output a set supply voltage under the control of the processor.

[0112] According to an embodiment of the present invention, the first current regulating unit is specifically:

[0113] a current limiting circuit, configured to regulate the supply current output by the first lithium battery module;

[0114] The input end of the current limiting circuit is connected to the output end of the first DC bus;

[0115] The output end of the current limiting circuit is connected in parallel to the power supply bus.

[0116] It should be noted that the first current regulating unit is a current limiting circuit for regulating the power supply current output by the first lithium battery module. The first current regulating unit regulates the power supply current and merges it into the power supply bus for use as the power supply output of the UPS.

[0117] Please refer to Figure 4 , Figure 4 A schematic diagram showing a method for controlling a UPS battery with high-rate and short-time discharge is shown.

[0118] like Figure 4 As shown, the second aspect of the present invention discloses the high-rate short-time discharge UPS battery control method, which specifically includes:

[0119] S402, obtaining first temperature information;

[0120] S404, determining first current upper limit information according to the first temperature information;

[0121] S406, obtaining first power information, first voltage information, and first time information;

[0122] S408: Determine second current upper limit information based on the first power information, the first voltage information, and the first time information;

[0123] S410, determining whether the second current upper limit information is lower than the first current upper limit information;

[0124] S412: If yes, modify the first current upper limit information according to the second current upper limit information;

[0125] S414, obtaining first current information;

[0126] S416, determining second current information based on the first current information and the first current upper limit information;

[0127] S418: Adjust the first current regulating unit according to the second current information.

[0128] It should be noted that the first temperature information is the temperature value of the first battery cell; the first current upper limit information is the upper limit value of the power supply current allowed to be output by the first battery cell; and the second current upper limit information is the upper limit value of the power supply current allowed to be output by the first lithium battery module. The first power information is the power value of the first lithium battery module; the first voltage information is the required power supply voltage value of the UPS, that is, the required power supply voltage value of the first lithium battery module; the first time information is the power supply duration required to maintain the first lithium battery module; the first current information is the required power supply current value of the UPS; and the second current information is the power supply current value of the first lithium battery module.

[0129] In this embodiment, a lithium battery module is composed of multiple lithium battery cells connected in series. In a series circuit, the current flowing through each device is consistent. Therefore, the supply current value of each cell, i.e., the supply current value of the lithium battery module, is determined based on the cell status and the power supply requirements of the lithium battery module. First, based on the operating temperature of the cell, an upper limit value for the output supply current of the cell, i.e., first current upper limit information, is obtained by table lookup. This is used to ensure that the cell does not overheat during power supply and affect battery life. Second, based on the capacity of the lithium battery module, combined with the required output voltage and power supply duration, the maximum current value that the remaining capacity of the lithium battery can provide is calculated, i.e., second current upper limit information. If the second current upper limit information is lower than the first current upper limit information, the first current upper limit information is modified based on the second current upper limit information to limit the supply current of the lithium battery module. Then, since the supply current of the UPS is composed of the output currents of several lithium battery modules connected in parallel, the supply current value required for each lithium battery module, i.e., second current information, is determined based on the required output current of the UPS and the upper limit value of the supply current of each lithium battery module, according to a set current distribution rule. Finally, based on the required supply current from the lithium battery module, the corresponding first current regulation unit is adjusted to ensure the lithium battery module provides current. By limiting the supply current from the lithium battery module, the UPS improves operational safety while still meeting discharge requirements. Furthermore, based on the output current upper limit of each lithium battery module and the set current distribution rules, the supply current for each module is set to balance the operating conditions of each module, thereby extending the service life of the UPS.

[0130] In the embodiment of the present invention, determining the second current information according to the first current information and the first current upper limit information is specifically:

[0131] Obtaining third current upper limit information according to the sum of the first current upper limit information;

[0132] determining whether the first current information is greater than the third current upper limit information;

[0133] If not, the second current information is set to 0, and a first abnormal instruction is sent to the background;

[0134] If yes, obtaining a first power sequence according to the first power information and a set sorting method;

[0135] Second current information is determined according to the first current information and the first electrical quantity sequence.

[0136] It should be noted that the UPS's power supply current is composed of the power supply currents of several lithium battery modules connected in parallel. In this embodiment, the available power supply current of the lithium battery module is compared with the power supply requirement of the UPS to determine the power supply current of each lithium battery module. First, the sum of the first current upper limit information of each lithium battery module is calculated to obtain third current upper limit information, which represents the maximum current value that can be provided when all lithium batteries in the UPS are connected in parallel. Then, it is determined whether the UPS's power supply current requirement is greater than the third current upper limit information. If so, the power supply current of the lithium battery module cannot meet the UPS's power supply requirement. In this case, the power supply current of the lithium battery module is set to 0, i.e., power output is stopped. At the same time, a first exception instruction is sent to the backend to indicate that the lithium battery module cannot maintain the UPS's power supply state due to insufficient power supply current. If not, the power supply current of the lithium battery module can meet the UPS's power supply requirement. In this case, the power supply information of each lithium battery module is first sorted in ascending or descending order to obtain a first power sequence. Then, the power supply current of each lithium battery module is determined according to the set allocation rule based on the UPS power supply current requirement and the first power sequence.

[0137] Please refer to Figure 5 , Figure 5 A flow chart for determining second current information provided by an embodiment of the present invention is shown.

[0138] In the embodiment of the present invention, Figure 5 As shown, the second current information is determined according to the first current information and the first power sequence, specifically:

[0139] S502, obtaining third current information according to the first current information;

[0140] S504, obtaining first ratio information according to the first power sequence;

[0141] S506, obtaining second current information based on the first power sequence, the third current information and the first ratio information;

[0142] S508, determining whether the second current information exceeds the first current upper limit information;

[0143] S510, if yes, setting the second current information according to the first current upper limit information;

[0144] S512, updating the third current information according to the second current information;

[0145] S514, determining whether the third current information is 0;

[0146] S516: If yes, then end the second current information confirmation process;

[0147] S518: If not, determine second current information according to the third current information and the first power sequence.

[0148] It should be noted that, as an implementation method, this embodiment provides a current distribution rule for distributing the required output power supply current of each lithium battery module according to its power state. The third current information is the current calculation value in the current distribution rule, which is used to represent the required value of the power supply current. First, according to the first power sequence, the total power of all lithium battery modules is calculated and recorded as the first total power; then, according to the ratio of the power of each lithium battery to the first total power, the first proportion information is obtained to represent the power proportion of each lithium battery module in the UPS. Then, according to the first power sequence, the second current information of the lithium battery module is calculated in sequence; wherein, the second current information is obtained by calculating the product of the third current information and the first proportion information; that is, since the lithium battery modules are connected in parallel, the higher the power value of the lithium battery module, the higher the allocated power supply current value, that is, the higher the power supply power required to be provided. Finally, after setting the second current information of a lithium battery module, the third current information is updated; when the third current information is 0, it means that the current distribution of the lithium battery module has been completed, otherwise, the second current information of the next lithium battery module is set according to the first power sequence.

[0149] In an embodiment of the present invention, the following further comprises:

[0150] obtaining second voltage information;

[0151] determining whether the second voltage information is greater than the first voltage information;

[0152] If not, the first current upper limit information is set to 0, and the conduction selection unit is switched to the second conduction state;

[0153] If yes, obtaining second power information;

[0154] According to the second power information, the conduction state of the conduction selection unit is switched and the voltage regulation unit is adjusted.

[0155] It should be noted that the second voltage information is the sum of the voltage values of all the cells in the first lithium battery module; the second power information is the power value of the first cell. In this embodiment, the voltage value of the cell is used to determine whether the lithium battery module where the cell is located can provide a power supply voltage that meets the requirements. First, determine whether the second voltage information is greater than the required value of the UPS power supply voltage; if not, it means that the current first lithium battery module cannot meet the power supply voltage requirement. At this time, the first current upper limit information of the current first lithium battery module is set to 0, and the conduction selection unit is set to the second conduction state to disconnect the power supply output of all cells in the first lithium battery module; if so, it means that the voltage value of the current first lithium battery module meets the power supply voltage requirement. At this time, according to the power value of the first cell in the first lithium battery module, the conduction state of the conduction selection unit of each cell module is set and the power supply voltage of the cell is adjusted through the voltage adjustment unit.

[0156] In the embodiment of the present invention, switching the conduction state of the conduction selection unit and adjusting the voltage regulation unit according to the second power information is specifically:

[0157] Obtaining a second power sequence according to the second power information and a set sorting method;

[0158] Obtaining third voltage information according to the second electrical quantity sequence and the first voltage information;

[0159] Determining whether the third voltage information exceeds a preset first voltage threshold;

[0160] If so, switching the conduction selection unit to the first conduction state and adjusting the voltage regulation unit according to the third voltage information;

[0161] If not, the conduction selection unit is switched to the second conduction state, and the second power sequence is adjusted and updated.

[0162] It should be noted that the third voltage information is the supply voltage value of the first battery cell. The supply voltage of the first lithium battery module is composed of the supply voltages of several first battery cells connected in series. In this embodiment, the supply voltage value of each battery cell is calculated based on the charge values of the first battery cells and a predetermined voltage distribution method. First, the charge values of the first battery cells are arranged in ascending or descending order to obtain a second charge sequence. Then, based on the second charge sequence and the first voltage information, the predetermined voltage distribution method is used to obtain third voltage information. Finally, a determination is made as to whether the third voltage information exceeds a preset first voltage threshold. If so, the third voltage information is within the voltage regulation range. Therefore, the conduction selection unit is switched to the first conduction state, i.e., the battery cell outputs power, and the voltage regulation parameters of the voltage regulation unit are adjusted according to the third voltage information. If not, the third voltage information is too low, and the voltage regulation unit cannot output a voltage value that is too low. Therefore, the conduction selection unit is switched to the second conduction state, i.e., the disconnected state, and the charge value of the current battery cell is removed from the second charge sequence. Calculation of the third voltage information for the remaining battery cells continues.

[0163] Please refer to Figure 6 , Figure 6 A flowchart of confirming third voltage information provided by an embodiment of the present invention is shown.

[0164] In the embodiment of the present invention, Figure 6 As shown, the third voltage information is obtained according to the second power sequence and the first voltage information, specifically:

[0165] S602, obtaining fourth voltage information according to the first voltage information;

[0166] S604: extracting the second power information of the second power sequence in sequence according to a preset order;

[0167] S606, determining whether the second power information exceeds a preset first power threshold;

[0168] S608, if not, obtaining second ratio information according to the second power sequence;

[0169] S610, obtaining third voltage information based on the second power sequence, the fourth voltage information, and the second ratio information;

[0170] S612: If yes, determine whether the fourth voltage information exceeds a preset second voltage threshold;

[0171] S614, if not, setting the third voltage information according to the fourth voltage information, and ending the third voltage information setting process;

[0172] S616: If yes, set the third voltage information according to the preset second voltage threshold, and update the fourth voltage information according to the difference between the fourth voltage information and the second voltage threshold.

[0173] It should be noted that, as an implementation method, this embodiment provides a voltage distribution rule for distributing the required output power supply voltage of each battery cell according to the power state of each battery cell. The fourth voltage information is the voltage calculation value in the voltage distribution rule, which is used to represent the required value of the power supply voltage. As an implementation method, first, according to the second power sequence, the second power information of the first battery cell is extracted one by one in descending order, and then the relationship between the second power information and the preset first power threshold is compared. When the second power information does not exceed the preset first power threshold, the remaining first battery cells in the second power sequence need to be summed up according to the power values to obtain the sum of the remaining power, which is recorded as the second total power; then, the second proportion information is obtained based on the ratio of the power of each battery cell to the above-mentioned second total power; and the third voltage information is obtained by calculating the product of the fourth voltage information and the second proportion information. When the second power information exceeds the preset first power threshold, it indicates that the first battery cell has sufficient power and the battery cell can output power according to the preset second voltage threshold. The fourth voltage information is determined to determine whether it exceeds the preset second voltage threshold. If not, the current battery cell is allocated a supply voltage according to the fourth voltage information, and the voltage allocation of the first lithium battery module is completed. If so, the third voltage information is set according to the preset second voltage threshold, and the fourth voltage information is updated, and the allocation process of the third voltage information of the next battery cell is continued. According to the above allocation method, the output of each battery cell can be balanced to extend the service life of the battery cell.

[0174] It is worth mentioning that it also includes:

[0175] When it is determined that a first abnormal feedback instruction is received;

[0176] determining whether the second current upper limit information is higher than the first current upper limit information;

[0177] If so, determining whether the first temperature information exceeds a preset first temperature threshold;

[0178] If not, the first current upper limit information is adjusted upward.

[0179] It should be noted that when the power supply current output of the lithium battery module is limited and the first abnormal instruction is sent to the background, if the first abnormal feedback instruction fed back by the background is received, the strategy of increasing the current limit value is executed. First, it is determined whether the second current upper limit information is higher than the first current upper limit information. If so, it means that the power supply current output of the lithium battery module is limited due to temperature limitations, and the lithium battery power may meet the power supply current output requirements. At this time, it is determined whether the first temperature information exceeds the preset first temperature threshold. If not, it means that the temperature value of the battery cell is within the set controllable range, and the first current upper limit information is adjusted upward to adjust the output state of the lithium battery module. By improving the current limit value strategy, the continuity of UPS power supply is improved.

[0180] It is worth mentioning that it also includes:

[0181] Obtain discharge record information;

[0182] Sending the discharge record information to a first neural network model to obtain a second current limiting correspondence table;

[0183] Obtaining a first current limiting correspondence table;

[0184] Determining whether the first current limiting correspondence table is the same as the second current limiting correspondence table;

[0185] If not, the first current limiting correspondence table is updated according to the second current limiting correspondence table.

[0186] It should be noted that, in this embodiment, the current limiting value correspondence table is adjusted according to the discharge record of the UPS; wherein the current limiting correspondence table is used to find the first current upper limit information according to the temperature value. The first current limiting correspondence table is the correspondence table currently used by the UPS. As an implementation method, the discharge record information of the UPS is sent to the first neural network model, and the use and aging degree of the lithium battery module are calculated by the first neural network, and the corresponding second current limiting correspondence table is output. When the first current limiting correspondence table is different from the second current limiting correspondence table, the first current limiting correspondence table is updated according to the second current limiting correspondence table calculated by the neural network model. Through the calculation of the neural network model, the UPS output situation is made to be more in line with the use status of the lithium battery module, so as to improve the safety and reliability of the power supply output.

[0187] In summary, the present invention provides a high-rate, short-time discharge UPS battery circuit and control method. The discharge circuit of the lithium battery UPS is composed of several first lithium battery modules, a power supply bus, a communication bus and a processor. The first lithium battery module is composed of several battery cell modules connected in series. After voltage regulation and current limiting, the power supply current is connected in parallel to the power supply bus, thereby improving the short-time load capacity of the UPS; the high-rate, short-time discharge UPS battery control method is also used to adjust the output voltage of each battery cell and the power supply current of each lithium battery module in real time according to the temperature information and power information of the battery cell, thereby improving the safety of UPS use while meeting the discharge requirements; in addition, by balancing the output of each battery cell, the service life of the UPS is extended.

[0188] 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.

[0189] If the functions are implemented as software 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 portion that contributes to the prior art, or the portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes 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 various media capable of storing program code, such as USB flash drives, mobile hard drives, read-only memories (ROMs), random access memories (RAMs), magnetic disks, or optical disks.

[0190] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A high-rate, short-time discharge UPS battery circuit, characterized in that: The high-rate short-time discharge UPS battery circuit includes: At least two first lithium battery modules, a power supply bus, a communication bus and a processor; The first lithium battery module includes: a first battery cell, a first state detection module, a first output control module, a first DC bus and a first current regulation unit; The first battery cell is a lithium battery cell, which is used to store and release electrical energy; The first state detection module is used to detect the working state information of the first battery cell, and then transmit the working state information to the processor through the communication bus; The first output control module is used to control the power supply conduction state of the first battery cell and the power supply output voltage of the first battery cell; The first DC bus is used to transmit the power supply current of the first lithium battery module; The first current regulating unit is used to regulate the supply current of the first lithium battery module, and the output is connected to the power supply bus; The power supply bus is the power supply output end of the UPS; The communication bus is a communication carrier for transmitting communication or control signals between the processor and the first lithium battery module; The processor is configured to obtain the working status information of the first lithium battery module through the communication bus, and then adjust the power supply status of the first lithium battery module through the communication bus; The control method of the high-rate short-time discharge UPS battery circuit includes: Acquire first temperature information, where the first temperature information is a temperature value of a first battery cell; Determining first current upper limit information according to the first temperature information, where the first current upper limit information is an upper limit value of a power supply current that the first battery cell is allowed to output; Obtaining first power information, first voltage information, and first time information, where the first power information is the power value of the first lithium battery module, the first voltage information is the required power supply voltage of the UPS, and the first time information is the power supply duration required to be maintained by the first lithium battery module; Determining second current upper limit information according to the first power information, the first voltage information, and the first time information, where the second current upper limit information is an upper limit value of the power supply current allowed to be output by the first lithium battery module; determining whether the second current upper limit information is lower than the first current upper limit information; If yes, modifying the first current upper limit information according to the second current upper limit information; Acquire first current information, where the first current information is a required value of a power supply current of the UPS; Determine second current information based on the first current information and the first current upper limit information, where the second current information is a power supply current value of the first lithium battery module; adjusting the first current regulating unit according to the second current information; Obtaining second voltage information, where the second voltage information is the sum of voltage values of all battery cells in the first lithium battery module; determining whether the second voltage information is greater than the first voltage information; If not, the first current upper limit information is set to 0, and the conduction selection unit is switched to the second conduction state; If yes, obtain second power information, where the second power information is the power value of the first battery cell; According to the second power information, the conduction state of the conduction selection unit is switched and the voltage regulation unit is adjusted.

2. The high-rate short-time discharge UPS battery circuit according to claim 1, characterized in that: The first status detection module specifically includes: Power detection unit and temperature detection unit; The power detection unit is a power detection circuit, configured to detect the remaining power value of the first battery cell and transmit the power value to the processor via the communication bus; The temperature detection unit is a temperature detection circuit or a temperature sensor, which is used to detect the operating temperature value of the first battery cell and transmit the temperature value to the processor through the communication bus.

3. The high-rate short-time discharge UPS battery circuit according to claim 1, characterized in that: The first output control module specifically includes: conduction selection unit and voltage regulation unit; The common end of the conduction selection unit is connected to the input port of the first DC bus, the first end of the conduction selection unit is connected to the first battery cell, and the second end of the conduction selection unit is connected to the output port of the first DC bus; The voltage regulating unit is a voltage regulating circuit, which is used to adjust the power supply output voltage of the first battery cell. The input end of the voltage regulating circuit is connected to the first battery cell, and the output end of the voltage regulating circuit is connected to the input and output of the first DC bus.

4. The high-rate short-time discharge UPS battery circuit according to claim 1, characterized in that: The first current regulating unit is specifically: a current limiting circuit, configured to regulate the supply current output by the first lithium battery module; The input end of the current limiting circuit is connected to the output end of the first DC bus; The output end of the current limiting circuit is connected in parallel to the power supply bus.

5. A high-rate short-time discharge UPS battery control method, applied to the high-rate short-time discharge UPS battery circuit according to any one of claims 1 to 4, characterized in that: The method specifically includes: obtaining first temperature information; determining first current upper limit information according to the first temperature information; Acquiring first power information, first voltage information, and first time information; determining second current upper limit information according to the first power information, the first voltage information, and the first time information; determining whether the second current upper limit information is lower than the first current upper limit information; If yes, modifying the first current upper limit information according to the second current upper limit information; acquiring first current information; determining second current information according to the first current information and the first current upper limit information; adjusting the first current regulating unit according to the second current information; obtaining second voltage information; determining whether the second voltage information is greater than the first voltage information; If not, the first current upper limit information is set to 0, and the conduction selection unit is switched to the second conduction state; If yes, obtaining second power information; According to the second power information, the conduction state of the conduction selection unit is switched and the voltage regulation unit is adjusted.

6. A high-rate short-time discharge UPS battery control method according to claim 5, characterized in that: The determining of the second current information according to the first current information and the first current upper limit information is specifically: Obtaining third current upper limit information based on the sum of the first current upper limit information, wherein the third current upper limit information indicates a maximum current value that can be provided when all lithium batteries in the UPS are connected in parallel for output; determining whether the first current information is greater than the third current upper limit information; If not, the second current information is set to 0, and a first abnormal instruction is sent to the background; If yes, obtaining a first power sequence according to the first power information and a set sorting method; Second current information is determined according to the first current information and the first electrical quantity sequence.

7. A high-rate short-time discharge UPS battery control method according to claim 6, characterized in that: The determining of the second current information according to the first current information and the first electrical quantity sequence is specifically: Obtaining third current information according to the first current information, wherein the third current information is a current calculation value in a current distribution rule; obtaining first ratio information according to the first power sequence; Based on the first electrical quantity sequence, obtaining second current information according to the third current information and the first ratio information; determining whether the second current information exceeds the first current upper limit information; If yes, setting the second current information according to the first current upper limit information; updating the third current information according to the second current information; Determining whether the third current information is 0; If yes, then the second current information confirmation process ends; If not, second current information is determined according to the third current information and the first electrical quantity sequence.

8. The high-rate short-time discharge UPS battery control method according to claim 5, characterized in that: The switching of the conduction state of the conduction selection unit and the adjustment of the voltage regulation unit according to the second power information are specifically: Obtaining a second power sequence according to the second power information and a set sorting method; Obtaining third voltage information according to the second power sequence and the first voltage information, where the third voltage information is a supply voltage value of the first battery cell; Determining whether the third voltage information exceeds a preset first voltage threshold; If so, switching the conduction selection unit to the first conduction state and adjusting the voltage regulation unit according to the third voltage information; If not, the conduction selection unit is switched to the second conduction state, and the second power sequence is adjusted and updated.

9. A high-rate short-time discharge UPS battery control method according to claim 8, characterized in that: The obtaining of the third voltage information according to the second power sequence and the first voltage information is specifically as follows: Obtaining fourth voltage information according to the first voltage information, where the fourth voltage information is a voltage calculation value in a voltage allocation rule; extracting the second power information of the second power sequence in sequence according to a preset order; Determining whether the second power information exceeds a preset first power threshold; If not, obtaining second ratio information according to the second electrical quantity sequence; Based on the second power sequence, obtaining third voltage information according to the fourth voltage information and the second ratio information; If yes, determining whether the fourth voltage information exceeds a preset second voltage threshold; If not, setting the third voltage information according to the fourth voltage information, and ending the setting process of the third voltage information; If so, the third voltage information is set according to a preset second voltage threshold, and the fourth voltage information is updated according to a difference between the fourth voltage information and the second voltage threshold.

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