A high power density UPS lithium battery system and power supply method

Abstract

The present invention provides a high power density UPS lithium battery system and power supply method. First, first weight information is determined according to first power information, second weight information is determined according to first cycle number information, and third weight information is determined according to the first temperature information; then, lithium battery cells of the UPS are sorted according to the first weight information, the second weight information and the third weight information to obtain a first battery cell sequence; finally, first quantity information is determined according to first voltage information, and then the battery cells are driven to supply power according to the first quantity information and the first battery cell sequence; the present invention adjusts the power supply status of each lithium battery cell according to the status of the UPS lithium battery cell, and prolongs the service life of the lithium battery cell and improves the use safety of the UPS while ensuring the power supply demand of the UPS.

Description

Technical Field

[0001] The present invention relates to the field of electronic power supplies, and more particularly, to a high power density UPS lithium battery system and a power supply method. Background Art

[0002] As a core IT device, an UPS (Uninterruptible Power Supply) plays a crucial role in ensuring the power supply safety required for the normal operation of a data center. When various faults occur in the power grid, the UPS outputs high-quality power through the batteries it is equipped with after AC inversion to avoid data loss or task interruption caused by power outages.

[0003] Servers in AI computing power centers use a large number of high-performance dedicated chips such as GPUs and TPUs, and their power consumption may be 2-3 times higher than that of traditional servers, and they have higher requirements for the stability, security, and environmental control of the power supply. Traditional UPSs use lead-acid batteries, which have problems such as short cycle life, large volume and weight, and high maintenance costs in data center scenarios. Therefore, there is an urgent need for a high power density UPS lithium battery technology that can provide greater output power while improving the use safety and cost performance. Summary of the Invention

[0004] In view of the above problems, the purpose of the present invention is to provide a high power density UPS lithium battery system and a power supply method. First, it can determine the first weight information according to the first power information, determine the second weight information according to the first cycle number information, and determine the third weight information according to the first temperature information; then, according to the first weight information, the second weight information, and the third weight information, the lithium battery cells of the UPS are sorted to obtain the first cell sequence; finally, the first quantity information is determined according to the first voltage information, and then according to the first quantity information and the first cell sequence, the cells are driven to supply power; the present invention adjusts the power supply of each lithium battery cell according to the state of the UPS lithium battery cells, and while ensuring the power supply requirements of the UPS, extends the service life of the lithium battery cells and improves the use safety of the UPS.

[0005] The first aspect of the present invention provides a high power density UPS lithium battery system, and the system includes:

[0006] A processor, a health value analysis module, and a power supply switch module;

[0007] The processor is used to sort the power supply priority status of the lithium battery cells through the health value analysis module, and then switch the power supply switch module of each lithium battery cell according to the power supply quantity of the lithium battery cells.

[0008] In this solution, the health value analysis module further includes:

[0009] The power acquisition unit is used to acquire the power values of each lithium battery cell;

[0010] The cycle count recording unit is used to record the charge and discharge cycle counts of each lithium battery cell;

[0011] The temperature acquisition unit is used to acquire the temperature values of each lithium battery cell;

[0012] The health value calculation unit is used to calculate the health values of each lithium battery cell.

[0013] In this solution, the power supply switch module is specifically:

[0014] Used to control the power supply states of each lithium battery cell, and switch to the conducting state or the disconnecting state according to the control instructions of the processor.

[0015] The second aspect of the present invention provides a high power density UPS power supply method, and the method includes:

[0016] Obtain the first power information;

[0017] Determine the first weight information according to the first power information;

[0018] Obtain the first cycle count information;

[0019] Determine the second weight information according to the first cycle count information;

[0020] Obtain the first temperature information;

[0021] Determine the third weight information according to the first temperature information;

[0022] Obtain the first cell sequence according to the first weight information, the second weight information, and the third weight information;

[0023] Obtain the first voltage information;

[0024] Determine the first quantity information according to the first voltage information;

[0025] Drive the cells to supply power according to the first quantity information and the first cell sequence.

[0026] In this solution, the step of determining the first weight information according to the first power information is specifically:

[0027] Obtain the first power sequence according to the first power information in a descending order;

[0028] Determine the first weight threshold according to the minimum value of the first power sequence and the preset power segmentation rule;

[0029] According to the first power sequence and a preset power segmentation rule, first weight information is obtained according to the first weight threshold value.

[0030] In this solution, the determining of the second weight information according to the first cycle number information is specifically as follows:

[0031] Determine whether the first cycle number information exceeds a preset first cycle number threshold value;

[0032] If so, set the second weight information according to a preset second weight threshold value;

[0033] If not, set the second weight information according to the first cycle number information.

[0034] In this solution, the determining of the third weight information according to the first temperature information is specifically as follows:

[0035] Determine whether the first temperature information is lower than a preset first temperature threshold value;

[0036] If so, set the third weight information according to a preset third weight threshold value;

[0037] If not, determine whether the first temperature information exceeds a preset second temperature threshold value;

[0038] If so, set the third weight information according to a preset fourth weight threshold value;

[0039] If not, obtain the third weight information according to a preset temperature weight correspondence table.

[0040] In this solution, the obtaining of the first battery cell sequence according to the first weight information, the second weight information, and the third weight information is specifically as follows:

[0041] According to the first weight information, the second weight information, and the third weight information, first health value information is obtained according to a preset first health value relation formula;

[0042] According to the first health value information, a first health value sequence is obtained in an ascending order of arrangement;

[0043] According to the first health value sequence, a first battery cell sequence is obtained.

[0044] In this solution, the driving of the battery cells to supply power according to the first quantity information and the first battery cell sequence is specifically as follows:

[0045] According to the first quantity information, first power supply flag information is sequentially set according to the arrangement order of the first battery cell sequence;

[0046] Determine whether the first power supply flag information indicates a power supply state;

[0047] If so, switch the power supply switch of the corresponding battery cell to the on state;

[0048] If not, switch the power supply switch of the corresponding battery cell to the off state.

[0049] In this solution, it further includes:

[0050] Determine whether the first temperature information exceeds a preset over-temperature threshold;

[0051] If so, set the first power supply flag information to the disabled state and switch the power supply switch of the corresponding battery cell to the off state.

[0052] The present invention provides a high power density UPS lithium battery system and a power supply method. First, according to the first power quantity information, determine the first weight information, according to the first cycle number information, determine the second weight information, and according to the first temperature information, determine the third weight information; then, according to the first weight information, the second weight information and the third weight information, sort the lithium battery cells of the UPS to obtain a first battery cell sequence; finally, determine the first quantity information according to the first voltage information, and then drive the battery cells to supply power according to the first quantity information and the first battery cell sequence; the present invention adjusts the power supply conditions of each lithium battery cell according to the state of the UPS lithium battery cells, and while ensuring the power supply requirements of the UPS, extends the service life of the lithium battery cells and improves the use safety of the UPS. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments. 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.

[0054] Figure 1 Shows a block diagram of a high power density UPS lithium battery system of the present invention;

[0055] Figure 2 Shows a flowchart of a high power density UPS power supply method of the present invention;

[0056] Figure 3 Shows a flowchart of determining the first weight information provided in this embodiment;

[0057] Figure 4 Shows a flowchart of determining the second weight information provided in this embodiment;

[0058] Figure 5 Shows a flowchart of determining the third weight information provided in this embodiment. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0059] Next, in combination with the accompanying drawings in the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0060] 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 of ordinary skill in the technical field to which the present invention belongs. It should also be understood that terms such as those defined in a general dictionary should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and should not be interpreted in an idealized or overly formal sense, unless clearly defined in the embodiments of the present invention.

[0061] The "first", "second" and similar words used in the embodiments of the present invention do not denote any order, quantity or importance, but are only used to distinguish different components. Words such as "a", "an" or "the" do not denote a quantity limitation either, but mean that there is at least one. Similarly, words such as "comprising" or "including" 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. The terms "connected" or "coupled" and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The steps before or after the methods of the embodiments of the present invention do not necessarily need to be carried out precisely in order. On the contrary, they can be carried out in reverse order or simultaneously. At the same time, other operations can also be added to these processes, or one or several steps can be removed from these processes.

[0062] In addition, in each embodiment of the present invention, the various functional modules can be integrated together to form an independent part, or each module can exist alone, or two or more modules can be integrated to form an independent part.

[0063] Figure 1 The flowchart of a high power density UPS power supply method of the present invention is shown.

[0064] As Figure 1 shown, in the first aspect of the present invention, a high power density UPS lithium battery system is disclosed, and the system includes:

[0065] a processor 101, a health value analysis module 102, and a power supply switch module 103;

[0066] The processor is used to sort the power supply priority status of lithium - ion battery cells through the health value analysis module, and then switch the power supply switch module of each lithium - ion battery cell according to the number of power - supplied lithium - ion battery cells.

[0067] It should be noted that, as the data - processing center and control center of the UPS lithium - ion battery system, the processor first sorts the lithium - ion battery cells according to the health values of each lithium - ion battery cell output by the health value analysis module. Then, according to the number of lithium - ion battery cells required to meet the power - supply demand, the power - supply switch module is switched in sequence according to the sorted lithium - ion battery cells, so that the lithium - ion battery cells are in a power - supply conducting state or a disconnected state.

[0068] According to an embodiment of the present invention, the health value analysis module further includes:

[0069] A power - quantity acquisition unit, which is used to acquire the power - quantity values of each lithium - ion battery cell;

[0070] A charge - discharge cycle number recording unit, which is used to record the charge - discharge cycle numbers of each lithium - ion battery cell;

[0071] A temperature acquisition unit, which is used to acquire the temperature values of each lithium - ion battery cell;

[0072] A health value calculation unit, which is used to calculate the health values of each lithium - ion battery cell.

[0073] It should be noted that the health value calculation unit determines the first weight value according to the power - quantity value acquired by the power - quantity acquisition unit, determines the second weight value according to the charge - discharge cycle number recorded by the charge - discharge cycle number recording unit, and determines the third weight value according to the temperature value acquired by the temperature acquisition unit. Then, the health value calculation unit obtains the health value of the lithium - ion battery cell according to the first weight value, the second weight value and the third weight value according to the set health - value relationship formula.

[0074] According to an embodiment of the present invention, the power - supply switch module is specifically:

[0075] It is used to control the power - supply state of each lithium - ion battery cell and switch to a conducting state or a disconnected state according to the control instruction of the processor.

[0076] It should be noted that the power - supply switch module obtains the control instruction sent by the processor and according to the power - supply flag information in the control instruction. When the power - supply flag information is in a power - supply output state, it is switched to a conducting state to enable the corresponding lithium - ion battery cell to output power; otherwise, it is switched to a disconnected state to enable the corresponding lithium - ion battery cell to stop outputting.

[0077] Figure 2 The block diagram of a high - power - density UPS lithium - ion battery system according to the present invention is shown.

[0078] As Figure 2As shown in the figure, the second aspect of the present invention discloses a high power density UPS power supply method, and the method includes:

[0079] S202, obtaining the first power quantity information;

[0080] S204, determining the first weight information according to the first power quantity information;

[0081] S206, obtaining the first cycle number information;

[0082] S208, determining the second weight information according to the first cycle number information;

[0083] S210, obtaining the first temperature information;

[0084] S212, determining the third weight information according to the first temperature information;

[0085] S214, obtaining the first battery cell sequence according to the first weight information, the second weight information and the third weight information;

[0086] S216, obtaining the first voltage information;

[0087] S218, determining the first quantity information according to the first voltage information;

[0088] S220, driving the battery cells to supply power according to the first quantity information and the first battery cell sequence.

[0089] It should be noted that the first power quantity information is the power quantity value of each lithium battery cell; the first weight information is one of the weight parameters for calculating the health value of the lithium battery cell; the first cycle number information is the charge and discharge cycle number of each lithium battery cell; the second weight information is one of the weight parameters for calculating the health value of the lithium battery cell; the obtaining of the first temperature information is the temperature value of each lithium battery cell; the third weight information is one of the weight parameters for calculating the health value of the lithium battery cell; the first battery cell sequence is a sequence obtained by arranging the lithium battery cells in ascending or descending order according to their health values; the first voltage information is the power supply voltage required by the load; the first quantity information is the number of lithium battery cells required to be output when the UPS supplies power.

[0090] In this embodiment, based on information such as the power, charge and discharge cycle times, and temperature of the lithium battery cell, the health value of the lithium battery cell is evaluated, and the lithium battery cells are sorted according to the health value. Then, the corresponding number of lithium battery cells is driven according to the power supply demand to achieve power supply. In practical applications, a redundant power supply scheme is usually adopted. For example, when 120 strings of lithium battery cells can meet the power supply demand of the UPS, actually 136 strings of lithium battery cells are used to form the UPS, and a redundant design is adopted to improve the fault tolerance of the UPS. Therefore, by balancing the power supply working state of each lithium battery cell, while ensuring the power supply demand of the UPS, the output power supply situation of each lithium battery cell is controlled, so as to achieve the effect of extending the service life of the lithium battery cell. As an implementation manner, first, according to the first power information, the first weight information is determined; according to the first cycle number information, the second weight information is determined; according to the first temperature information, the third weight information is determined. Then, according to the first weight information, the second weight information, and the third weight information, and according to a preset health value calculation method, the health state of each lithium battery cell is obtained, and the lithium battery cells of the UPS are sorted to obtain the first cell sequence. Finally, according to the required power supply voltage, the number of lithium battery cells that need to be switched to the power supply output state is obtained, and then according to the first cell sequence, the corresponding number of lithium battery cells is driven in sequence to meet the power supply demand.

[0091] Figure 3 The flowchart showing the determination of the first weight information provided in this embodiment is shown.

[0092] According to an embodiment of the present invention, as Figure 3 shown, the step of determining the first weight information according to the first power information is specifically as follows:

[0093] S302, according to the first power information, in a descending order arrangement, a first power sequence is obtained;

[0094] S304, according to the minimum value of the first power sequence and a preset power segmentation rule, a first weight threshold is determined;

[0095] S306, according to the first power sequence and the preset power segmentation rule, and according to the first weight threshold, the first weight information is obtained.

[0096] It should be noted that in this embodiment, the power is segmented according to a preset power segmentation rule. As an implementation manner, the segmentation cases are: 93% - 100%, 85% - 93%, 70% - 85%, 50% - 70%, 20% - 50%, and 20% - 0%. First, according to the power of each lithium battery cell, a first power sequence is obtained. Then, according to the minimum value in the first power sequence, a first weight threshold is determined. For example, if the minimum value of the lithium battery cells in the first power sequence is 83%, then the segment it belongs to is the 3rd segment, and at this time, the first weight threshold is 3. Finally, according to the power segmentation rule and the first weight threshold, the first weight information of each lithium battery cell is determined; as an implementation manner, the weight increases in segments, that is to say, the first weight information is 1 when the power is in the range of 93% - 100%, the first weight information is 2 when the power is in the range of 85% - 93%, and the first weight information is 3 when the power is in the range of 70% - 85%; as another implementation manner, the weight decreases in segments, that is to say, the first weight information is 3 when the power is in the range of 93% - 100%, the first weight information is 2 when the power is in the range of 85% - 93%, and the first weight information is 1 when the power is in the range of 70% - 85%.

[0097] Figure 4 The flowchart showing the determination of the second weight information provided in this embodiment is shown.

[0098] According to an embodiment of the present invention, as Figure 4 shown, determining the second weight information according to the first cycle number information is specifically:

[0099] S402, determine whether the first cycle number information exceeds a preset first cycle number threshold;

[0100] S404, if so, set the second weight information according to a preset second weight threshold;

[0101] S406, if not, set the second weight information according to the first cycle number information.

[0102] It should be noted that when a lithium - ion battery cell completes a full charge and full discharge cycle, it is called a charge - discharge cycle. Limited by the physical characteristics of the lithium - ion battery cell, the higher the number of charge - discharge cycles, the shorter its remaining service life. In this embodiment, according to the first cycle number information, the second weight information is determined to calculate the health value of the lithium - ion battery cell. First, it is judged whether the first cycle number information exceeds a preset first cycle number threshold; if so, it means that the number of charge - discharge cycles has exceeded the set usage times, and there is a certain degree of natural wear in the lithium - ion battery cell. Therefore, the second weight information is set according to the set second weight threshold; if not, it means that the lithium - ion battery cell is in a normal state, and at this time, the second weight information is set according to the number of charge - discharge cycles.

[0103] Figure 5 The flowchart showing the determination of the third weight information provided in this embodiment is shown.

[0104] According to an embodiment of the present invention, as Figure 5 shown, the determination of the third weight information according to the first temperature information is specifically as follows:

[0105] S502, judge whether the first temperature information is lower than a preset first temperature threshold;

[0106] S504, if so, set the third weight information according to a preset third weight threshold;

[0107] S506, if not, judge whether the first temperature information exceeds a preset second temperature threshold;

[0108] S508, if so, set the third weight information according to a preset fourth weight threshold;

[0109] S510, if not, obtain the third weight information according to a preset temperature - weight correspondence table.

[0110] It should be noted that in this embodiment, the third weight information is determined according to the temperature value of the lithium - ion battery cell to calculate the health value; since the lithium - ion battery cell generates heat when in the power - supply state, if the temperature value of the lithium - ion battery cell is too high, there is a risk of burning and damage. In this embodiment, when the temperature value of the lithium - ion battery cell is lower than the preset first temperature threshold, it means that the temperature of the lithium - ion battery cell is at a safe temperature. Therefore, the third weight information is set according to the preset third weight threshold. When the temperature value of the lithium - ion battery cell is higher than the preset second temperature threshold, it means that the temperature of the lithium - ion battery cell is too high, and there is a risk of over - temperature if the power - supply operation is continuously performed. Therefore, the third weight information is set according to the preset fourth weight threshold. When the temperature value of the lithium - ion battery cell is within the range of the first temperature threshold and the second temperature threshold, at this time, the preset temperature - weight correspondence table is searched to obtain the third weight information.

[0111] According to an embodiment of the present invention, obtaining the first battery cell sequence according to the first weight information, the second weight information, and the third weight information is specifically as follows:

[0112] Obtain first health value information according to the first weight information, the second weight information, and the third weight information according to a preset first health value relational expression;

[0113] Obtain a first health value sequence according to the first health value information in ascending order;

[0114] Obtain the first battery cell sequence according to the first health value sequence.

[0115] It should be noted that in this embodiment, according to the first weight information, the second weight information, and the third weight information, the health value score of each lithium battery cell is calculated according to a preset health value calculation relational expression; wherein, the health value represents the degree of goodness of the state of the lithium battery cell. As an implementation manner, the lower the value of the health value, the better the state of the lithium battery cell; as another implementation manner, the higher the value of the health value, the better the state of the lithium battery cell. Then, the health values of the lithium battery cells are arranged in ascending order to obtain the first health sequence for confirming the first battery cell sequence. That is to say, the arrangement order of the first battery cell sequence represents the arrangement order of the degree of goodness of the state of the lithium battery cell.

[0116] According to an embodiment of the present invention, driving the battery cells to supply power according to the first quantity information and the first battery cell sequence is specifically as follows:

[0117] Set first power supply flag information in sequence according to the first quantity information and the arrangement order of the first battery cell sequence;

[0118] Judge whether the first power supply flag information is in a power supply state;

[0119] If so, switch the power supply switch of the corresponding battery cell to the on state;

[0120] If not, switch the power supply switch of the corresponding battery cell to the off state.

[0121] It should be noted that in this embodiment, according to the number of lithium battery cells for performing the power supply requirement, the power supply flag information of each lithium battery cell is set in sequence according to the arrangement order of the first battery cell sequence; wherein, the flag information is a parameter for setting the working state of the lithium battery cell. Judge whether the first power supply flag information is in a power supply state; if so, it means that the lithium battery cell needs to output electric energy, then switch its power supply switch to the on state; if not, it means that the lithium battery cell does not need to output electric energy, then switch its power supply switch to the off state.

[0122] According to an embodiment of the present invention, it further includes:

[0123] Determine whether the first temperature information exceeds a preset over-temperature threshold;

[0124] If so, set the first power supply flag information to the disabled state and switch the power supply switch of the corresponding battery cell to the off state.

[0125] It should be noted that in this embodiment, an over-temperature protection mechanism is provided. When the temperature of the lithium battery cell exceeds the preset over-temperature threshold, its first power supply flag information is set to the disabled state, indicating that the current lithium battery cell is prohibited from outputting electric energy as a power source. This can prevent the battery cell from burning out and even damage to the UPS caused by continuous temperature rise during power supply, thereby improving the safety of UPS use.

[0126] It is worth mentioning that it also includes:

[0127] Obtain the battery cell sequence record, calculate the mean value of the sorting according to the preset second quantity information, and obtain the first row number information;

[0128] According to the first row number information, obtain the first row number sequence;

[0129] According to the first row number sequence, obtain the first row number mean value information;

[0130] Calculate the deviation ratio between the first row number information and the first row number mean value information to obtain the first deviation ratio information;

[0131] Determine whether the first deviation ratio information is greater than a preset deviation ratio threshold;

[0132] If so, send the first maintenance instruction to the background according to the first deviation ratio information.

[0133] It should be noted that in this embodiment, according to the sorting record of each lithium battery cell, the mean value of the sorting is calculated to obtain the first row number information; that is, according to the serial numbers of the lithium battery cells during each power supply, the mean value is calculated to obtain the average row number value. For example, if the serial numbers of the lithium battery cells numbered 20 in the recent 5 times are 5, 10, 8, 15, and 22 respectively, then its first row number information is 12. After aggregating the first row number information of all lithium battery cells, the first row number sequence is obtained. Then, first calculate the mean value according to the first row number sequence to obtain the first row number mean value information; then calculate the difference between the row number of each lithium battery cell and the row number mean value, calculate the ratio of the above difference to the mean value to obtain the first deviation ratio information. When the first deviation ratio information is greater than the preset deviation ratio threshold, it indicates that there is a large deviation between the health status of the current lithium battery cell and the health status of other lithium battery cells. At this time, according to the number of the current lithium battery cell and the corresponding first deviation ratio information, the first maintenance instruction is generated and sent to improve the efficiency of UPS maintenance.

[0134] It is worth mentioning that it also includes:

[0135] Obtain power supply record information;

[0136] According to the power supply times information and power supply power information in the power supply record information, obtain the second health value information;

[0137] According to the second health value information, search for a preset relationship correspondence table to obtain a second health relationship;

[0138] Update the first health value relationship according to the second health relationship.

[0139] It should be noted that in this embodiment, according to the power supply record of the UPS, including but not limited to information such as the number of power supplies and the power supply power, the health value of the UPS, that is, the second health value information, is calculated according to the set relationship; among them, the second health value information also represents the aging condition of the lithium battery cells of the UPS. Then, according to the second health value information, search for a preset relationship correspondence table to obtain a second health relationship for updating the first health value relationship. In this embodiment, by updating the first health value relationship according to the aging condition of the lithium battery cells of the UPS, the calculated health value of the lithium battery cells is made more in line with the actual state.

[0140] The present invention provides a high-power density UPS lithium battery system and a power supply method. First, according to the first power information, determine the first weight information, according to the first cycle number information, determine the second weight information, and according to the first temperature information, determine the third weight information; then, according to the first weight information, the second weight information, and the third weight information, sort the lithium battery cells of the UPS to obtain a first cell sequence; finally, determine the first quantity information according to the first voltage information, and then drive the cells to supply power according to the first quantity information and the first cell sequence; the present invention adjusts the power supply situation of each lithium battery cell according to the state of the lithium battery cells of the UPS, and while ensuring the power supply requirements of the UPS, extends the service life of the lithium battery cells and improves the use safety of the UPS.

[0141] When the above-described function is implemented in the form of a software functional module and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or a part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: various media that can store program codes, such as USB flash drives, mobile hard disks, read-only memories (ROMs), random access memories (RAMs), magnetic disks, or optical discs.

[0142] The foregoing are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A high-power density UPS power supply method is applied to a high-power density UPS lithium battery system, and the system includes a processor, a health value analysis module, and a power supply switch module; The processor is used to sort the power supply priority status of lithium battery cells through the health value analysis module, and then switch the power supply switch module of each lithium battery cell according to the number of power supply lithium battery cells; The health value analysis module further includes: The battery charge acquisition unit is used to acquire the charge values of each lithium battery cell; The charge-discharge cycle number recording unit is used to record the charge-discharge cycle numbers of each lithium battery cell; The temperature acquisition unit is used to acquire the temperature values of each lithium battery cell; the health value calculation unit is used to calculate the health values of each lithium battery cell; The power supply switch module is used to control the power supply status of each lithium battery cell and switch to the on state or off state according to the control instruction of the processor; It is characterized in that the method includes: Obtain the first battery charge information; According to the first battery charge information, obtain the first battery charge sequence in a descending order; According to the minimum value of the first battery charge sequence and the preset battery charge segmentation rule, determine the first weight threshold; According to the first battery charge sequence and the preset battery charge segmentation rule, obtain the first weight information according to the first weight threshold; Obtain the first charge-discharge cycle number information; According to the first charge-discharge cycle number information, determine the second weight information; Obtain the first temperature information; According to the first temperature information, determine the third weight information; According to the first weight information, the second weight information, and the third weight information, obtain the first battery cell sequence; Obtain the first voltage information; Determine the first quantity information according to the first voltage information; Drive the battery cells to supply power according to the first quantity information and the first battery cell sequence.

2. The high-power density UPS power supply method according to claim 1, characterized in that, The step of determining the second weight information according to the first charge-discharge cycle number information is specifically: Judge whether the first charge-discharge cycle number information exceeds the preset first charge-discharge cycle number threshold; If so, set the second weight information according to the preset second weight threshold; If not, set the second weight information according to the first charge-discharge cycle number information.

3. A high-power density UPS power supply method according to claim 1, characterized in that, The step of determining the third weight information according to the first temperature information is specifically: Judge whether the first temperature information is lower than the preset first temperature threshold; If so, set the third weight information according to the preset third weight threshold; If not, judge whether the first temperature information exceeds the preset second temperature threshold; If so, set the third weight information according to the preset fourth weight threshold; If not, obtain the third weight information according to the preset temperature weight correspondence table.

4. A high-power density UPS power supply method according to claim 1, characterized in that The step of obtaining the first battery cell sequence according to the first weight information, the second weight information, and the third weight information is specifically: According to the first weight information, the second weight information, and the third weight information, obtain the first health value information according to the preset first health value relation formula; According to the first health value information, obtain the first health value sequence in an ascending order; According to the first health value sequence, obtain the first battery cell sequence.

5. A high-power density UPS power supply method according to claim 1, characterized in that Driving the battery cells to supply power according to the first quantity information and the first battery cell sequence specifically includes: According to the first quantity information, sequentially set the first power supply flag information in the arrangement order of the first battery cell sequence; Judge whether the first power supply flag information is in a power supply state; If so, switch the power supply switch of the corresponding battery cell to the on state; If not, switch the power supply switch of the corresponding battery cell to the off state.

6. A high-power density UPS power supply method according to claim 1, characterized in that It further includes: Judge whether the first temperature information exceeds a preset over-temperature threshold; If so, set the first power supply flag information to the disabled state and switch the power supply switch of the corresponding battery cell to the off state.

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