High-rate short-time discharge UPS (Uninterrupted Power Supply) battery circuit and control method

Abstract

The invention provides a high-rate short-time discharge UPS (Uninterrupted Power Supply) battery circuit and a control method, a discharge circuit of a lithium battery UPS is formed by a plurality of first lithium battery modules, a power supply bus, a communication bus and a processor, and each first lithium battery module is formed by connecting a plurality of battery cell modules in series; after voltage regulation and current limiting, the power supply current is connected in parallel to a power supply bus, so that the short-time loading capacity of the UPS is improved; the output voltage of each battery cell and the power supply current of each lithium battery module are adjusted in real time according to the temperature information and the electric quantity information of the battery cells through a high-rate short-time discharge UPS battery control method, and the use safety of the UPS is improved under the condition that the discharge requirement is met; in addition, by balancing the output condition of each battery cell, the service life of the UPS is prolonged.

Description

Technical Field

[0001] The 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 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] In short-term high-power discharge scenarios, such as data center applications, traditional lead-acid battery UPS has the problems of large size, short cycle life and high maintenance cost. However, lithium battery UPS with high-rate short-time discharge has the characteristics of large output power and small size in data center application scenarios. A high-reliability high-rate short-time discharge UPS battery technology is conducive to improving the market competitiveness of lithium battery UPS. 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, wherein the discharge circuit of the lithium battery UPS is composed of a plurality of first lithium battery modules, a power supply bus, a communication bus and a processor, wherein the first lithium battery module is composed of a plurality of battery cell modules connected in series, and the power supply current is connected in parallel to the power supply bus after voltage regulation and current limiting, thereby improving the short-time load capacity of the UPS; and through a high-rate short-time discharge UPS battery control method, the output voltage of each battery cell and the power supply current of each lithium battery module are adjusted 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 object, the first aspect of the present invention provides a high-rate short-time discharge UPS battery circuit, the circuit comprising: 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 regulating 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 power 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, used to transmit communication or control signals between the processor and the first lithium battery module; 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.

[0006] In this solution, the first state detection module specifically includes: A power detection unit and a temperature detection unit; The power detection unit is a power detection circuit, which is used to detect the remaining power value of the first battery cell and transmit the power value to the processor through 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.

[0007] In this solution, the first output control module specifically includes: A conduction selection unit and a 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.

[0008] In this solution, the first current regulating unit is specifically: A current limiting circuit, used to adjust the power 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.

[0009] 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, and the method specifically includes: Acquiring 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; The first current regulating unit is adjusted according to the second current information.

[0010] In this solution, the second current information is determined according to the first current information and the first current upper limit information, specifically: Obtaining third current upper limit information according to the sum of the first current upper limit information; 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.

[0011] In this solution, the second current information is determined according to the first current information and the first electrical quantity sequence, specifically: Obtaining third current information according to the first current information; Obtaining first ratio information according to the first power sequence; Based on the first electrical quantity sequence, second current information is obtained 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.

[0012] This plan also includes: Acquiring 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 a 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.

[0013] In this solution, switching the conduction state of the conduction selection unit and adjusting the voltage regulation unit according to the second power information is specifically: According to the second power information, a second power sequence is obtained according to a set sorting method; Obtaining third voltage information according to the second electrical quantity sequence and the first voltage information; Determining whether the third voltage information exceeds a preset first voltage threshold; If yes, switching the conduction selection unit to the first conduction state, and adjusting the voltage adjustment 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.

[0014] In this solution, the third voltage information is obtained according to the second power sequence and the first voltage information, specifically: Obtaining fourth voltage information according to the first voltage information; 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.

[0015] 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 a plurality of first lithium battery modules, a power supply bus, a communication bus and a processor. The first lithium battery module is composed of a plurality of battery core 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 carrying 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 power 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 demand. In addition, the output condition of each battery core is balanced to extend the service life of the 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 connection diagram of a high-rate short-time discharge UPS battery circuit is shown; Figure 2 A circuit diagram of a first state detection module provided by an embodiment of the present invention is shown; Figure 3 A circuit diagram of a first output control module provided in an embodiment of the present invention is shown; Figure 4 A schematic diagram showing a method for controlling a UPS battery with a high rate and short time discharge is shown; Figure 5 A flowchart of determining second current information provided by an embodiment of the present invention is shown; Figure 6 A flow chart for confirming the third voltage information provided by an embodiment 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] Please refer to Figure 1 , Figure 1 The diagram shows a connection diagram of a high-rate, short-time discharge UPS battery circuit.

[0022] like Figure 1 As shown, the first aspect of the present invention discloses the high-rate short-time discharge UPS battery circuit, the circuit comprising: At least two first lithium battery modules 103, a power supply bus 109, a communication bus 102 and a processor 101; 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 regulating unit 108; 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 power 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, used to transmit communication or control signals between the processor and the first lithium battery module; 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.

[0023] It should be noted that the UPS with high rate and short time discharge realizes the superposition of power supply current by connecting several lithium battery modules in parallel; the lithium battery module realizes the superposition of power supply voltage by connecting several battery modules in series. As an implementation method, in actual application, 16 battery modules are connected in series to form a lithium battery module, represented by 16S1P; with the configuration of 10 16S1P lithium battery modules, it can achieve continuous output of 250kW power and guarantee more than five minutes of backup power time; and the fault tolerance rate is also improved through redundant design, that is, 11-12 16S1P lithium battery modules are installed in the battery cabinet.

[0024] In this embodiment, the processor collects the working state information of the lithium battery module through the communication bus, including but not limited to the battery cell power, battery cell temperature and heat dissipation state, etc., and the processor controls the power supply voltage and power supply current of the lithium battery module through the communication bus to meet the needs of the power load; wherein, the communication bus is at least one group of buses, as an implementation method, the processor collects the state information of the lithium battery module through a group of data buses, and controls the output of the lithium battery module through another group of control buses. The first lithium battery module includes a plurality of battery modules connected in series, and the battery module includes a first battery, a first state detection module and a first output control module. The first battery is a lithium battery cell, which is used to store and release electric energy. The first state detection module is used to detect the working state information of the first battery, including but not limited to the battery cell power, battery cell temperature and other information, and 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 and power supply voltage of the first battery. When the first battery is in the power supply conduction state, the output voltage of the first battery is connected in series to the first DC bus; when the first battery is in the power supply disconnection state, the first DC bus does not pass through the first battery. The first DC bus of the first lithium battery module gathers the supply voltage of the first battery cell, and then adjusts the supply current of the first lithium battery module through the first current regulating unit, so that the first lithium battery module merges the supply power into the power bus. The power bus gathers the power of multiple first lithium battery modules and is used as the power output of the UPS.

[0025] Please refer to Figure 2 , Figure 2 A circuit diagram of a first state detection module provided in an embodiment of the present invention is shown.

[0026] According to an embodiment of the present invention, Figure 2 As shown, the first state detection module specifically includes: A power detection unit 201 and a temperature detection unit 202; The power detection unit is a power detection circuit, which is used to detect the remaining power value of the first battery cell and transmit the power value to the processor through 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.

[0027] It should be noted that the power detection unit is a power detection circuit. As an implementation method, the power value of the battery cell is determined by detecting the voltage value at both ends of the battery cell. After obtaining the power value of the battery cell, the power value is transmitted to the processor through the communication bus. The temperature detection unit is a temperature detection circuit or a temperature sensor. As an implementation method, the voltage divider circuit of the thermistor is used as a temperature detection circuit. By detecting the resistance value 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 implementation method, a temperature sensor, such as DS18B20, is used. The processor reads the temperature value of the temperature sensor through the communication bus according to the set communication instructions.

[0028] 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.

[0029] According to an embodiment of the present invention, Figure 3 As shown, the first output control module specifically includes: Conducting the selection unit 301 and the voltage adjustment unit 302; 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.

[0030] It should be noted that the conduction selection unit includes two conduction states: the first conduction state indicates that the first battery cell is connected in series to the first DC bus for power supply conduction, and the second conduction state indicates that the first DC bus does not pass through the first battery cell for power supply disconnection. The voltage regulation unit is a voltage regulation circuit, and when in the power supply conduction state, the first battery cell outputs the set supply voltage according to the control of the processor.

[0031] According to an embodiment of the present invention, the first current regulating unit is specifically: A current limiting circuit, used to adjust the power 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.

[0032] 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 and merges the power supply current into the power supply bus for use as the power supply output of the UPS.

[0033] Please refer to Figure 4 , Figure 4 A schematic diagram of a high-rate short-time discharge UPS battery control method is shown.

[0034] like Figure 4 As shown, the second aspect of the present invention discloses the high-rate short-time discharge UPS battery control method, and the method specifically includes: S402, obtaining first temperature information; S404, determining first current upper limit information according to the first temperature information; S406, obtaining first power information, first voltage information, and first time information; S408, determining second current upper limit information according to the first power information, the first voltage information and the first time information; S410, determining whether the second current upper limit information is lower than the first current upper limit information; S412: If yes, modify the first current upper limit information according to the second current upper limit information; S414, obtaining first current information; S416, determining second current information according to the first current information and the first current upper limit information; S418: Adjust the first current regulating unit according to the second current information.

[0035] 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; the second current upper limit information is the upper limit value of the power supply current allowed to be output according to 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 value of the power supply voltage of the UPS, that is, the required value of the power supply voltage of the first lithium battery module; the first time information is the power supply duration required to be maintained by the first lithium battery module; the first current information is the required value of the power supply current of the UPS; the second current information is the power supply current value of the first lithium battery module.

[0036] In the present embodiment, the lithium battery module is composed of a plurality of lithium battery cells connected in series. In the series circuit, the current passing through each device is consistent. Therefore, according to the state of the battery cell and the power supply demand of the lithium battery module, the power supply current value of the battery cell is obtained, that is, the power supply current value of the lithium battery module. First, according to the working temperature of the battery cell, the upper limit value of the power supply current output by the battery cell is obtained by looking up the table, that is, the first current upper limit information, to ensure that the battery cell does not overheat when it is powered and affect the battery life. Secondly, according to the power value of the lithium battery module, combined with the required output power supply voltage and power supply duration, the maximum current value that can be provided by the remaining power of the lithium battery is calculated, that is, the second current upper limit information. When the second current upper limit information is lower than the first current upper limit information, the first current upper limit information is modified according to the second current upper limit information to limit the power supply current of the lithium battery module. Then, since the power supply current of the UPS is composed of the output currents of several lithium battery modules in parallel, according to the power supply current value required to be output by the UPS and the upper limit value of the power supply current of each lithium battery module, according to the set current distribution rule, the power supply current value required to be provided by each lithium battery module, that is, the second current information, is obtained. Finally, according to the power supply current value required by the lithium battery module, the corresponding first current regulating unit is adjusted so that the lithium battery module provides power supply current to the outside. By limiting the power supply current value of the lithium battery module, the safety of UPS operation is improved while meeting the discharge requirements. In addition, according to the output current upper limit value of each lithium battery module, the power supply current of each lithium battery module is set according to the set current distribution rules to balance the working conditions of each lithium battery module, thereby extending the service life of the UPS.

[0037] 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: Obtaining third current upper limit information according to the sum of the first current upper limit information; 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.

[0038] It should be noted that the power supply current of the UPS is composed of the power supply currents of several lithium battery modules in parallel. In this embodiment, the available power supply current of the lithium battery module is compared and judged with the power supply demand of the UPS, and then the power supply current of each lithium battery module is set. First, the sum of the first current upper limit information of each lithium battery module is calculated to obtain the third current upper limit information, which is used to indicate the maximum current value that can be provided when all lithium batteries in the UPS are output in parallel. Then, it is determined whether the demand for the UPS power supply current is greater than the third current upper limit information; if so, it means that the power supply current of the lithium battery module cannot meet the power supply demand of the UPS. At this time, the power supply current of the lithium battery module is set to 0, that is, the power supply output is stopped, and at the same time, the first abnormal instruction is sent to the background to indicate that the lithium battery module cannot maintain the power supply state of the UPS due to insufficient power supply current; if not, it means that the power supply current of the lithium battery module can meet the power supply demand of the UPS. At this time, the power information of each lithium battery module is first arranged in ascending or descending order to obtain the first power sequence, and then the power supply current of each lithium battery module is obtained according to the set distribution rule according to the demand value of the UPS power supply current and the first power sequence.

[0039] 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.

[0040] 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: S502, obtaining third current information according to the first current information; S504, obtaining first proportion information according to the first power sequence; S506, obtaining second current information based on the first electrical quantity sequence, according to the third current information and the first ratio information; S508, determining whether the second current information exceeds the first current upper limit information; S510, if yes, setting the second current information according to the first current upper limit information; S512, updating the third current information according to the second current information; S514, determining whether the third current information is 0; S516, if yes, then end the second current information confirmation process; S518: If not, determine second current information according to the third current information and the first electrical quantity sequence.

[0041] 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 the power state of each lithium battery module. Wherein, 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, continue to set the second current information of the next lithium battery module according to the first power sequence.

[0042] In an embodiment of the present invention, it also includes: Acquiring 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 a 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.

[0043] 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 current voltage value of the 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.

[0044] 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: According to the second power information, a second power sequence is obtained according to a set sorting method; Obtaining third voltage information according to the second electrical quantity sequence and the first voltage information; Determining whether the third voltage information exceeds a preset first voltage threshold; If yes, switching the conduction selection unit to the first conduction state, and adjusting the voltage adjustment 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.

[0045] It should be noted that the third voltage information is the power supply voltage value of the first battery cell. The power supply voltage of the first lithium battery module is composed of the power supply voltages of several first batteries connected in series. In this embodiment, according to the power value of the first battery cell, the power supply voltage value of each battery cell is calculated according to the set voltage distribution method. First, according to the power value of the first battery cell, the second power sequence is obtained in ascending or descending order. Then, according to the second power sequence and the first voltage information, the third voltage information is obtained according to the set voltage distribution method. Finally, it is determined whether the third voltage information exceeds the preset first voltage threshold; if so, it means that the third voltage information is within the voltage regulation range, therefore, the switch conduction selection unit is the first conduction state, that is, the battery output power supply state, and the voltage regulation parameter of the voltage regulation unit is adjusted according to the third voltage information; if not, it means that the third voltage information is too low, and the voltage regulation unit cannot output a too low voltage value, therefore, the switch conduction selection unit is the second conduction state, that is, the disconnected state, and the power value of the current battery cell is removed from the second power sequence, and then the third voltage information of other batteries is calculated.

[0046] Please refer to Figure 6 , Figure 6 A flow chart for confirming the third voltage information provided by an embodiment of the present invention is shown.

[0047] 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: S602, obtaining fourth voltage information according to the first voltage information; S604, extracting the second power information of the second power sequence in sequence according to a preset order; S606, determining whether the second power information exceeds a preset first power threshold; S608, if not, obtaining second ratio information according to the second power sequence; S610, obtaining third voltage information based on the second power sequence, according to the fourth voltage information and the second ratio information; S612: If yes, determine whether the fourth voltage information exceeds a preset second voltage threshold; S614, if not, setting the third voltage information according to the fourth voltage information, and ending the setting process of the third voltage information; 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.

[0048] 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. Among them, 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 magnitude 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 according to the ratio of the power of each battery cell to the above-mentioned second total power sum; 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 means that the power of the first battery cell is sufficient, and the battery cell can output power according to the preset second voltage threshold; determine whether the fourth voltage information exceeds the preset second voltage threshold. If not, after the current battery cell allocates the power supply voltage according to the fourth voltage information, the voltage allocation of the first lithium battery module is completed. If yes, set the third voltage information according to the preset second voltage threshold, update the fourth voltage information, and continue to execute the allocation process of the third voltage information of the next battery cell. According to the above allocation method, the output of each battery cell can be balanced to extend the service life of the battery cell.

[0049] It is worth mentioning that it also includes: When it is determined that a first abnormal feedback instruction is received; determining whether the second current upper limit information is higher than the first current upper limit information; If yes, determining whether the first temperature information exceeds a preset first temperature threshold; If not, the first current upper limit information is adjusted upward.

[0050] 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, determine 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.

[0051] It is worth mentioning that it also includes: Obtain discharge record information; Sending the discharge record information to the first neural network model to obtain a second current limiting correspondence table; Obtain a first current limiting corresponding table; Determining whether the first current limiting correspondence table is the same as the second current limiting correspondence table; If not, the first current limiting correspondence table is updated according to the second current limiting correspondence table.

[0052] It should be noted that, in the present 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 being 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 condition is 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.

[0053] In summary, the present invention provides a high-rate short-time discharge UPS battery circuit and control method, wherein the discharge circuit of the lithium battery UPS is composed of a plurality of first lithium battery modules, a power supply bus, a communication bus and a processor, wherein the first lithium battery module is composed of a plurality of battery cell modules connected in series, and the power supply current is connected in parallel to the power supply bus after voltage regulation and current limiting, thereby improving the short-time load capacity of the UPS; and through a high-rate short-time discharge UPS battery control method, the output voltage of each battery cell and the power supply current of each lithium battery module are adjusted in real time according to the temperature information and power information of the battery cell, thereby improving the use safety of the UPS while meeting the discharge requirements; in addition, the output of each battery cell is balanced to extend the service life of the UPS.

[0054] 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.

[0055] 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.

[0056] 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 high rate short time discharge UPS battery circuit, characterized in that: The high-rate short-time discharge UPS battery circuit comprises: 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 regulating 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 power 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, used to transmit communication or control signals between the processor and the first lithium battery module; 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.

2. The high-rate short-time discharge UPS battery circuit according to claim 1 is characterized in that: The first state detection module specifically includes: A power detection unit and a temperature detection unit; The power detection unit is a power detection circuit, which is used to detect the remaining power value of the first battery cell and transmit the power value to the processor through 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 is characterized in that: The first output control module specifically includes: A conduction selection unit and a 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 is characterized in that: The first current regulating unit is specifically: A current limiting circuit, used to adjust the power 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 described in any one of claims 1-4, characterized in that: The method specifically comprises: Acquiring 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; The first current regulating unit is adjusted according to the second current information.

6. A high rate short time discharge UPS battery control method according to claim 5, characterized in that: The determining 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 according to the sum of the first current upper limit information; 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 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; Obtaining first ratio information according to the first power sequence; Based on the first electrical quantity sequence, second current information is obtained 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. A high rate short time discharge UPS battery control method according to claim 5, characterized in that: Also includes: Acquiring 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 a 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.

9. A high rate short time discharge UPS battery control method according to claim 8, characterized in that: The switching on state of the conduction selection unit and adjusting the voltage regulation unit according to the second power information is specifically: According to the second power information, a second power sequence is obtained according to a set sorting method; Obtaining third voltage information according to the second electrical quantity sequence and the first voltage information; Determining whether the third voltage information exceeds a preset first voltage threshold; If yes, switching the conduction selection unit to the first conduction state, and adjusting the voltage adjustment 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.

10. A high rate short time discharge UPS battery control method according to claim 9, characterized in that: The obtaining of the third voltage information according to the second power sequence and the first voltage information is specifically: Obtaining fourth voltage information according to the first voltage information; 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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