UPS power supply system and power supply control method thereof

Abstract

The present invention relates to the field of power supply technology, and specifically to a UPS power supply system and a power supply control method thereof, comprising at least three battery modules, the battery modules being used to supply power to a load according to business requirements; a power supply monitoring module, being used to monitor and output the electrical variable data of each battery module; a UPS host, judging the working state of each battery module according to the electrical variable data; when the working state of the first battery module among all the battery modules is a fault state, disconnecting the power output of the first battery module; adjusting the power distribution value of each normal battery module among all the battery modules based on a power distribution strategy; wherein the power distribution strategy comprises determining the power distribution value according to the remaining power of the second battery module, so that the time for all the second battery modules to supply power to the load meets the business requirements. The UPS power supply system and the power supply control method thereof of the present invention can improve the reliability and stability of power supply.

Description

Technical Field

[0001] The present invention relates to the technical field of power supply, in particular to a UPS power supply system and a power supply control method thereof. Background Art

[0002] Mobile UPS (Uninterruptible Power Supply) power systems are widely used to support continuous power supply for key equipment, especially in lecture halls, conference rooms, construction project opening ceremonies and other places that require high reliability. These applications have extremely high requirements for power stability. UPS power systems can ensure that when the mains fails or the power fluctuates, they can continue to provide stable power supply to the load, ensuring the normal operation of important equipment such as microphones and speakers.

[0003] UPS power systems are usually composed of multiple battery modules, which are connected to the load end in parallel; each battery module is composed of multiple battery cells connected in series to provide sufficient power. In order to ensure that the system can provide sufficient power when the load demand is high, the UPS power system is usually equipped with a backup battery module. The backup battery module remains on standby during the operation of the system and replaces the faulty module when a battery module in the system fails. The backup battery module can improve the reliability of the UPS system to a certain extent, but the connection to the backup battery module involves physical delays caused by the switching of mechanical nodes and relay control. During this physical delay time, the load loses part of its power supply capacity, resulting in instantaneous power shortage at the load end, which in turn affects the normal use of the equipment and may even cause important equipment to shut down or fail. Summary of the invention

[0004] To this end, the technical problem to be solved by the present invention is to overcome the problem of instantaneous power shortage caused by the physical delay caused by connecting to the backup battery module in the prior art, and to provide a UPS power supply system and a power supply control method thereof. When a fault is detected, the power allocation value is adjusted in the battery module in a normal state based on the power allocation strategy, so as to meet the power supply time required for the business without the need for additional connection to the backup battery, thereby improving the reliability and stability of the system and solving the problem of instantaneous power shortage caused by the physical delay caused by connecting to the backup battery module.

[0005] In a first aspect, in order to solve the above technical problems, the present invention provides a UPS power supply system, comprising:

[0006] At least three battery modules, all of which are connected in parallel, and the input end after parallel connection forms a node A, and the output end forms a node B; wherein the node A is used to connect to the power terminal; the node B is used to connect to the load; the battery module is used to supply power to the load according to business needs; wherein the business needs include that the power supply time is the first time;

[0007] A power supply monitoring module, which is used to monitor and output the electrical variable data of each of the battery modules;

[0008] A UPS host connected to the power supply monitoring module and all the battery modules;

[0009] The UPS host is used to receive the electrical variable data and determine the working status of each of the battery modules according to the electrical variable data;

[0010] The UPS host is further used to disconnect the power output of the first battery module when the working state of the first battery module among all the battery modules is a fault state;

[0011] The UPS host is further used to adjust the power allocation value of each second storage battery module in all the storage battery modules based on the power allocation strategy; the working state of the second storage battery module is a normal state;

[0012] The power allocation strategy includes determining a power allocation value according to the remaining power of the second battery module, so that the time for all the second battery modules to supply power to the load meets the first time.

[0013] In one embodiment of the present invention, the power allocation strategy further includes dynamically adjusting the power allocation value according to the real-time power demand of the load.

[0014] In one embodiment of the present invention, the power allocation strategy further includes determining the power allocation value according to the power supply efficiency of the second battery module.

[0015] In one embodiment of the present invention, the power allocation strategy determines the power allocation value based on the following method:

[0016] ;

[0017] Wherein, i represents the serial number of the second battery module; n represents the number of the second battery modules; P i represents the power allocation value of the i-th second battery module; E i Indicates the remaining power of the i-th second battery module; E min,i represents the minimum remaining power threshold of the i-th second battery module; represents the power supply efficiency of the i-th second battery module; Indicates the power demand of the load.

[0018] In one embodiment of the present invention, after determining the power allocation value, within a period t, predicting the power supply time of the second battery module according to the power allocation value to obtain a first power supply time prediction value, and correcting the power allocation value according to the first power supply time prediction value:

[0019] Among them, if the first power supply time prediction value is less than or equal to the first time, the power allocation value of the t+1 cycle is reduced; if the first power supply time prediction value is greater than the first time, the second battery module supplies power according to the power allocation value within the t+1 cycle.

[0020] In one embodiment of the present invention, if the first power supply time prediction value is greater than the first time, the second battery module supplies power according to the power allocation value within the t+1 period, further comprising:

[0021] In the t+1 period, the power supply time is predicted according to the actual power supply power of the second battery module, a second power supply time prediction value is obtained, the power supply time change rate is calculated, and the power allocation value of the second battery module in the t+2 period is corrected according to the power supply time change rate; wherein the power supply time change rate is determined according to the following method:

[0022] ;

[0023] represents the power supply time change rate; T1 represents the first power supply time prediction value; T2 represents the second power supply time prediction value; Represents the absolute value of the difference between the first power supply time prediction value and the second power supply time prediction value.

[0024] In one embodiment of the present invention, predicting the power supply time of the second battery module according to the power allocation value to obtain a first power supply time prediction value includes:

[0025] Obtaining historical power supply data of the battery module of the same model;

[0026] Extracting a sample remaining power set, a sample power supply power set, a sample power supply efficiency set and a sample power supply time set from the historical power supply data;

[0027] Constructing a neural network model, taking the sample remaining power set, the sample power supply power set and the sample power supply efficiency set as input, and taking the sample power supply time set as output to train the neural network model to obtain a power supply time predictor;

[0028] The remaining power, power supply efficiency and power allocation value of the second battery module are input into the power supply time predictor to obtain the first power supply time prediction value.

[0029] In one embodiment of the present invention, it further comprises a chassis, wherein the battery module, the power supply monitoring module and the UPS host are all assembled in the chassis; a shock absorbing platform is arranged in the chassis;

[0030] Wherein, the shock absorbing platform includes a plurality of shock absorbers, and the plurality of shock absorbers are arranged according to the structure of the battery bracket, and the plurality of shock absorbers are fixedly connected to the battery bracket after the arrangement positions are determined; the battery module is fixedly assembled on the battery bracket.

[0031] In one embodiment of the present invention, after the layout positions of the multiple shock absorbers are determined, the multiple shock absorbers are fixedly connected to the battery holder through their respective mounting surfaces; wherein the mounting surfaces of the multiple shock absorbers are located on the same plane.

[0032] In the second aspect, based on the same inventive concept, in order to solve the above technical problems, the present invention provides a power supply control method for a UPS power supply system, which is applied to a UPS power supply system, wherein the UPS power supply system comprises at least three battery modules, all of which are connected in parallel, and one end of the parallel-connected battery modules is connected to a power terminal, and the other end is connected to a load; the battery module is used to supply power to the load according to business needs; wherein the business needs include a power supply time being a first time; the method comprises the following steps,

[0033] S100, obtaining electrical variable data of each of the battery modules;

[0034] S200, monitoring the working status of each of the battery modules according to the electrical variable data;

[0035] S300, when the working state of a first storage battery module among all the storage battery modules is a fault state, disconnecting the power output of the first storage battery module;

[0036] S400, adjusting the power allocation value of each second battery module in all the battery modules based on the power allocation strategy; the working state of the second battery module is normal;

[0037] S500, supplying power to the load based on the adjusted power allocation value;

[0038] The power allocation strategy includes determining a power allocation value according to the remaining power of the second battery module, so that the time for all the second battery modules to supply power to the load meets the first time.

[0039] The above technical solution of the present invention has the following beneficial effects compared with the prior art:

[0040] The UPS power supply system and power supply control method described in the present invention disconnect the faulty battery module when a battery module fault is detected, adjust the power distribution, transfer the load power of the faulty battery module to the normally working battery module, and balance the power distribution values ​​of each normally working battery module according to the power of the normally working battery module. Without the need to connect an additional backup battery, the power of the connected battery module is used to the maximum extent to meet the power supply time required by the business, thereby improving the reliability and stability of the system and solving the problem of instantaneous power shortage caused by the physical delay caused by connecting the backup battery module. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments of the present invention in conjunction with the accompanying drawings.

[0042] Figure 1 A block diagram of the module structure of a UPS power supply system in a preferred embodiment of the present invention;

[0043] Figure 2 A flow chart of correcting a power distribution value according to a power supply time prediction value in a preferred embodiment of the present invention;

[0044] Figure 3 A flow chart of obtaining a power supply time prediction value in a preferred embodiment of the present invention;

[0045] Figure 4 This is a schematic diagram of the structure of the battery module in the UPS power system being assembled to the shock-absorbing platform;

[0046] Figure 5 for Figure 4 The schematic diagram of the structure after the battery module and the battery bracket are hidden;

[0047] Figure 6 It is a flow chart of a UPS power system power supply control method in a preferred embodiment of the present invention.

[0048] Explanation of the reference numerals in the specification: 10 - power supply monitoring module; 20 - UPS host; 30 - battery module; 41 - battery bracket; 50 - shock absorbing platform, 51 - shock absorber. DETAILED DESCRIPTION

[0049] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention. Embodiment 1

[0050] Reference Figure 1 As shown, the embodiment of the present invention discloses a UPS power supply system, including a power supply monitoring module 10, a UPS host 20 and at least three battery modules 30; all the battery modules 30 are connected in parallel, and the input end after parallel connection forms a node A, and the output end forms a node B; wherein the node A is used to connect to the power terminal; the node B is used to connect to the load; the battery module 30 is used to supply power to the load according to business requirements; wherein the business requirements include that the power supply time is the first time;

[0051] The power supply monitoring module 10 is used to monitor and output the electrical variable data of each of the battery modules 30;

[0052] The UPS host 20 is connected to the power supply monitoring module 10 and all the battery modules 30; the UPS host 20 is used to receive the electrical variable data and determine the working status of each of the battery modules 30 according to the electrical variable data; the UPS host 20 is also used to disconnect the power output of the first battery module when the working status of the first battery module among all the battery modules 30 is a fault state; the UPS host 20 is also used to adjust the power allocation value of each second battery module among all the battery modules 30 based on the power allocation strategy; the working status of the second battery module is a normal state; wherein the power allocation strategy includes determining the power allocation value according to the remaining power of the second battery module, so that the time for all the second battery modules to supply power to the load meets the first time.

[0053] In a specific application scenario, the number of battery modules 30 is pre-configured according to the business requirements of the load end, and the business requirements include rated power, rated voltage, first time, etc.; for example, for a rated power of 10kVA, a rated voltage of 380V / 220V, and a first time of 0.5h, six battery modules 30 are configured accordingly, and each battery module 30 includes three lead-acid battery units. The configuration parameters are shown in the following Table 1:

[0054] Table 1

[0055] Serial number name parameter 1 Rated Power 10kVA (altitude ≤ 3000m, ambient temperature ≤ 30℃, relative humidity ≤ 95%) 2 Rated voltage 380V / 220V 3 First time ≥0.5h 4 UPS host model SPM10KL-33P (Schneider) 5 Battery Model 6-GFM-38 6 Total number of batteries 18 pieces 7 Protection level IP20 8 Number of battery modules 6 9 Power system quality ≤60kg (including battery and cable) 10 Battery module quality ≤63kg (including battery and cable) 11 Dimensions ≤1210mm×800mm×1310mm .

[0056] When pre-configuring the number and model of battery modules 30 according to business needs, a certain capacity redundancy is considered in advance, so that when a fault is detected in the battery module 30, the business needs of the load end can be met without the need to connect an additional backup battery. While ensuring power supply to the load-end business needs, the hardware investment in the backup battery module can be reduced to a certain extent.

[0057] The configured power supply monitoring module 10 monitors the electrical variable data of each battery module 30 in real time, such as temperature, discharge current, discharge voltage and remaining power, etc.; the battery module 30 can also communicate with the UPS host 20 to report its own electrical variable data to the UPS host 20; the UPS host 20 determines the working state of each battery module 30 based on the obtained electrical variable data, such as whether the temperature of the battery module 30 exceeds the dangerous temperature threshold. If it is higher than the dangerous temperature threshold, the working state of the battery module 30 is determined to be a fault state, that is, it is included in the first battery module. By monitoring the electrical variable data of the battery module in real time, potential faults can be discovered and solved in time.

[0058] When a faulty battery module is detected, the UPS host 20 cuts off the power output of the faulty battery module and reallocates the load power of the faulty battery module to other normal battery modules (i.e., the second battery module), ensuring that the load always obtains stable power support and solving the problem of instantaneous power shortage caused by physical delay when directly connecting to the backup battery module.

[0059] The power allocation strategy fully considers the remaining power of each second battery module, so that the system can use the energy of each second battery module as evenly as possible under the premise of ensuring the power supply time. By dynamically adjusting the power allocation, the utilization efficiency of the second battery module is improved, the power supply time is extended, and the stable operation of the load is ensured within the power supply time required by the business.

[0060] The UPS power supply system of the present invention disconnects the faulty battery module when a battery module fault is detected, and dynamically adjusts power distribution to transfer the load power of the faulty battery module to the normally working battery module, and balances the power distribution values ​​of each normally working battery module according to the power of the normally working battery module. In the case of no need to connect an additional backup battery, the power of the connected battery module is used to the maximum extent to meet the power supply time required by the business, thereby improving the reliability and stability of the system and solving the problem of instantaneous power shortage caused by physical delay caused by connecting a backup battery module.

[0061] In addition, it should be noted that when a faulty battery module 30 is detected and the remaining power of the normal battery module 30 is insufficient to support the power supply time required by the business, the solution of the embodiment of the present invention is also used to provide a stable power supply during the process of connecting to the backup battery module until the backup battery module is smoothly transitioned to normal access to the system. It can also solve the problem of instantaneous power shortage caused by physical delays caused by connecting to the backup battery module.

[0062] Furthermore, the power allocation strategy also includes dynamically adjusting the power allocation value according to the real-time power demand of the load. The power allocation strategy also includes determining the power allocation value according to the power supply efficiency of the second battery module.

[0063] In specific application scenarios, different from the static fixed ratio or pre-set allocation strategy mostly adopted by traditional UPS power supply systems, the power allocation strategy described in the embodiment of the present invention includes jointly determining the power allocation value according to the real-time power demand of the load, the remaining power of the second battery module and the power supply efficiency, that is, dynamically adjusting the discharge power in combination with the health status of the battery module, which not only optimizes the service life of the battery module, but also ensures the stability and reliability of the power supply.

[0064] Furthermore, the power allocation strategy determines the power allocation value based on the following method:

[0065] (Formula 1);

[0066] Wherein, i represents the serial number of the second battery module; n represents the number of the second battery modules; P i represents the power allocation value of the i-th second battery module; E i Indicates the remaining power of the i-th second battery module; E min,i represents the minimum remaining power threshold of the i-th second battery module; represents the power supply efficiency of the i-th second battery module; Indicates the power demand of the load.

[0067] In a specific application scenario, a determined power allocation value is obtained based on the above formula and is dynamically updated in real time. The minimum remaining power threshold of the second battery module is considered when calculating the power allocation value to protect the battery module from over-discharge, thereby further optimizing the service life of the battery module and ensuring the stability and reliability of power supply.

[0068] Further, refer to Figure 2 As shown, it also includes, after determining the power allocation value in period t, predicting the power supply time of the second battery module according to the power allocation value, obtaining a first power supply time prediction value, and correcting the power allocation value according to the first power supply time prediction value.

[0069] In a specific application scenario, the power allocation value determined in the t period should be understood as the power allocation value calculated according to Formula 1; the power supply time of the second battery module is predicted according to the calculated power allocation value to obtain the first power supply time prediction value, and the power allocation value is corrected according to the first power supply time prediction value. The power allocation value to be corrected here should also be understood as the power allocation value calculated by Formula 1 above. In other words, the power allocation value is not only a dynamic variable related to the remaining power of the second battery module, the power supply efficiency and the power demand of the load obtained by calculation according to Formula 1, but also a dynamic variable related to the predicted power supply time. Through multi-dimensional associations, it ensures that each second battery module discharges healthily while absolutely meeting the power supply business needs of the load end, and guarantees power supply within the power supply time required by the business.

[0070] Specifically, the strategy for correcting the power allocation value according to the first power supply time prediction value includes:

[0071] Strategy 1: If the first power supply time prediction value is less than or equal to the first time, then reduce the power allocation value of the t+1 period.

[0072] In a specific application scenario, if the predicted value of the first power supply time is less than or equal to the first time, it indicates that the corresponding second battery module cannot match the first time according to the current power allocation value. In order to ensure that all second battery modules share the current, a certain power is reduced as the execution power allocation value after the power allocation value of the second battery module is calculated, until the second battery module works normally until the first time. It should be noted here that when all second battery modules are powered together, each battery module bears less current, which relatively reduces the burden of a single battery module, prolongs the service life of the battery module and reduces overheating problems.

[0073] Strategy 2: If the first power supply time prediction value is greater than the first time, the second battery module supplies power according to the power allocation value in period t+1. In other words, the second battery module supplies power according to the power allocation value calculated in period t in period t+1.

[0074] Further, if the first power supply time prediction value is greater than the first time, the second battery module supplies power according to the power allocation value in the t+1 period, and further includes predicting the power supply time according to the actual power supply power of the second battery module in the t+1 period, obtaining the second power supply time prediction value, calculating the power supply time change rate, and correcting the power allocation value of the second battery module in the t+2 period according to the power supply time change rate; wherein the power supply time change rate is determined according to the following method:

[0075] ;

[0076] represents the power supply time change rate; T1 represents the first power supply time prediction value; T2 represents the second power supply time prediction value; Represents the absolute value of the difference between the first power supply time prediction value and the second power supply time prediction value.

[0077] In a specific application scenario, the first power supply time prediction value T1 is obtained in the t period, and the second power supply time prediction value T2 is obtained in the t+1 period. By analyzing the first power supply time prediction value T1 and the second power supply time prediction value T2, it can be understood whether the power supply demand at the load end fluctuates. The introduction of the power supply time change rate enables the system to respond to load fluctuations intelligently; for example, when the first power supply time prediction value T1 and the second power supply time prediction value T2 are both greater than the first time, and the power supply time change rate is greater than the preset power supply time change rate threshold, it indicates that the power supply demand at the load end fluctuates sharply, and at this time, the power allocation value of the second battery module in the t+2 period is reduced. When the first power supply time prediction value T1 is greater than the first time, and the second power supply time prediction value T2 is less than the first time, and the power supply time change rate is greater than the preset power supply time change rate threshold, it indicates that the power supply demand at the load end fluctuates sharply, and at this time, the power allocation value of the second battery module in the t+2 period is increased. It should be noted here that the power allocation value that needs to be corrected here should also be understood as the power allocation value calculated according to Formula 1. In addition, in addition to the above two situations, the second battery module outputs power according to the power allocation value.

[0078] Specifically, refer to Figure 3 As shown, predicting the power supply time according to the power allocation value, obtaining the power supply time prediction value includes the following steps:

[0079] Obtaining historical power supply data of the battery module of the same model;

[0080] Extracting a sample remaining power set, a sample power supply power set, a sample power supply efficiency set and a sample power supply time set from the historical power supply data;

[0081] Constructing a neural network model, taking the sample remaining power set, the sample power supply power set and the sample power supply efficiency set as input, and taking the sample power supply time set as output to train the neural network model to obtain a power supply time predictor;

[0082] The remaining power, power supply efficiency and power allocation value of the second battery module are input into the power supply time predictor to obtain the power supply time prediction value.

[0083] In specific application scenarios, the goal of the power supply time predictor is to predict the final power supply time based on the historical power supply data of the battery module (including remaining power, power supply power and power supply efficiency). A deep learning model (such as long short-term memory network LSTM, deep neural network, convolutional neural network, etc.) is used to perform deep learning on historical data to obtain a power supply time predictor. The trained and verified effective power supply time predictor is put into actual use. The remaining power, power supply efficiency and power allocation value of the second battery module at cycle t are input into the power supply time predictor to obtain the first power supply time prediction value. The remaining power, power supply efficiency and power allocation value of the second battery module at cycle t+1 are input into the power supply time predictor to obtain the second power supply time prediction value.

[0084] In other embodiments of the present invention, referring to Figure 4 and Figure 5 As shown, the UPS power system also includes a chassis, and the battery module 30, the power supply monitoring module 10 and the UPS host 20 are all assembled in the chassis; a shock absorbing platform 50 is arranged in the chassis; the shock absorbing platform 50 includes a plurality of shock absorbers 51, and the plurality of shock absorbers 51 are arranged according to the structure of the battery bracket 41, and the arrangement positions of the plurality of shock absorbers 51 are determined and fixedly connected to the battery bracket 41; the battery module 30 is fixedly assembled on the battery bracket 41.

[0085] In a specific application scenario, in the embodiment of the present invention, the battery module 30 uses a lead-acid battery. The lead-acid battery is different from the lithium battery in that it is not easy to break and has a sufficiently high power supply safety. However, the lead-acid battery is different from the lithium battery in that once the electrolyte leaks, it will cause great trouble for maintenance, which puts higher requirements on the assembly and transportation of the lead-acid battery module. In particular, the UPS power system in the embodiment of the present invention is a mobile UPS power system, and the application process involves long-distance transportation. How to reduce the risk of leakage of the battery module 30 during assembly and long-distance transportation is a new technical problem. In order to solve this technical problem, the UPS power system in the embodiment of the present invention also includes a chassis, and all the battery modules 30 included in the UPS power system will be fixed in the chassis, and the fixed assembly forms the first shock absorption. The battery module 30 is fixedly assembled by setting a specific shock absorption platform 50, and the shock absorption platform 50 forms the second shock absorption, ensuring the safety and stability of the lead-acid battery module during assembly and transportation. The shock absorbing platform 50 includes a plurality of shock absorbers 51, which are arranged according to the structure of the battery support 41, and the plurality of shock absorbers 51 are fixedly connected to the battery support 41 after the arrangement positions are determined; the battery module 30 is fixedly assembled on the battery support 41. In particular, after the arrangement positions of the plurality of shock absorbers 51 are determined, the plurality of shock absorbers 51 are fixedly connected to the battery support 41 through their respective mounting surfaces; wherein the mounting surfaces of the plurality of shock absorbers 51 are located on the same plane, so that the battery support 41 and the shock absorber 51 are assembled to the maximum extent, and the generated vibration is effectively transferred to the shock absorber 51 to the maximum extent, providing the best shock absorbing effect. Embodiment 2

[0086] Based on the same inventive concept, Figure 1 and Figure 6 As shown, the embodiment of the present invention discloses a power supply control method for a UPS power system, which is applied to a UPS power system, wherein the UPS power system comprises at least three battery modules 30, all of which are connected in parallel, and one end of the parallel-connected battery modules 30 is connected to a power terminal, and the other end is connected to a load; the battery module is used to supply power to the load according to business requirements; wherein the business requirements include a power supply time being a first time; the method comprises the following steps,

[0087] S100, obtaining electrical variable data of each of the battery modules 30;

[0088] S200, monitoring the working status of each of the battery modules according to the electrical variable data;

[0089] S300, when the working state of the first battery module among all the battery modules 30 is a fault state, disconnecting the power output of the first battery module;

[0090] S400, adjusting the power allocation value of each second battery module in all the battery modules based on the power allocation strategy; the working state of the second battery module is normal;

[0091] S500, supplying power to the load based on the adjusted power allocation value;

[0092] The power allocation strategy includes determining a power allocation value according to the remaining power of the second battery module, so that the time for all the second battery modules to supply power to the load meets the first time.

[0093] The power supply control method of the embodiment of the present invention is used to control the above-mentioned UPS power supply system, and the technical effects that can be achieved are as described in the above-mentioned embodiment, which will not be repeated here.

[0094] In summary, the UPS power supply system and power supply control method described in the present invention disconnect the faulty battery module when a battery module fault is detected, adjust the power distribution, transfer the load power of the faulty battery module to the normally working battery module, and balance the power distribution values ​​of each normally working battery module according to the power of the normally working battery module. Without the need to connect an additional backup battery, the power of the connected battery module is maximized to meet the power supply time required by the business, thereby improving the reliability and stability of the system and solving the problem of instantaneous power shortage caused by the physical delay caused by connecting the backup battery module.

[0095] Obviously, the above embodiments are merely examples for clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the protection scope of the invention.

Claims

1. UPS power supply system, characterized by: include, At least three battery modules, all of which are connected in parallel, and the input end after parallel connection forms a node A, and the output end forms a node B; wherein the node A is used to connect to the power terminal; the node B is used to connect to the load; the battery module is used to supply power to the load according to business needs; wherein the business needs include that the power supply time is the first time; A power supply monitoring module, which is used to monitor and output the electrical variable data of each of the battery modules; A UPS host connected to the power supply monitoring module and all the battery modules; The UPS host is used to receive the electrical variable data and determine the working state of each of the battery modules according to the electrical variable data; wherein the working state includes a fault state and a normal state, and the battery modules in the fault state and the normal state are the first battery module and the second battery module respectively; The UPS host is also used to disconnect the power output of the first battery module; The UPS host is further used to adjust the power allocation value of each second battery module based on the power allocation strategy; The power allocation strategy includes determining a power allocation value according to the remaining power of the second battery module so that the time for all the second battery modules to supply power to the load meets the first time, which includes: After determining the power allocation value in period t, predicting the power supply time of the second battery module according to the power allocation value to obtain a first power supply time prediction value; If the first power supply time prediction value is less than or equal to the first time, reducing the power allocation value of the t+1 period; If the first power supply time prediction value is greater than the first time, the second battery module supplies power according to the power allocation value in the t+1 period; and in the t+1 period, the power supply time is predicted according to the actual power supply power of the second battery module, the second power supply time prediction value is obtained, the power supply time change rate is calculated, and the power allocation value of the second battery module in the t+2 period is corrected according to the power supply time change rate; wherein the power supply time change rate is determined according to the following method: ; represents the power supply time change rate; T1 represents the first power supply time prediction value; T2 represents the second power supply time prediction value; Represents the absolute value of the difference between the first power supply time prediction value and the second power supply time prediction value.

2. The UPS power supply system according to claim 1, characterized in that: The power allocation strategy also includes dynamically adjusting the power allocation value according to the real-time power demand of the load.

3. The UPS power supply system according to claim 1, characterized in that: The power allocation strategy also includes determining the power allocation value according to the power supply efficiency of the second battery module.

4. The UPS power supply system according to any one of claims 1 to 3, characterized in that: The power allocation strategy determines the power allocation value based on the following method: ; Wherein, i represents the serial number of the second battery module; n represents the number of the second battery modules; P i represents the power allocation value of the i-th second battery module; E i Indicates the remaining power of the i-th second battery module; E min,i represents the minimum remaining power threshold of the i-th second battery module; represents the power supply efficiency of the i-th second battery module; Indicates the power demand of the load.

5. The UPS power supply system according to claim 1, characterized in that: Predicting the power supply time of the second battery module according to the power allocation value to obtain a first power supply time prediction value includes: Obtaining historical power supply data of the battery module of the same model; Extracting a sample remaining power set, a sample power supply power set, a sample power supply efficiency set and a sample power supply time set from the historical power supply data; Constructing a neural network model, taking the sample remaining power set, the sample power supply power set and the sample power supply efficiency set as input, and taking the sample power supply time set as output to train the neural network model to obtain a power supply time predictor; The remaining power, power supply efficiency and power allocation value of the second battery module are input into the power supply time predictor to obtain the first power supply time prediction value.

6. The UPS power supply system according to claim 1, characterized in that: It also includes a chassis, in which the battery module, the power supply monitoring module and the UPS host are all assembled; a shock-absorbing platform is provided in the chassis; Wherein, the shock absorbing platform includes a plurality of shock absorbers, and the plurality of shock absorbers are arranged according to the structure of the battery bracket, and the plurality of shock absorbers are fixedly connected to the battery bracket after the arrangement positions are determined; the battery module is fixedly assembled on the battery bracket.

7. The UPS power supply system according to claim 6, characterized in that: After the layout positions of the multiple shock absorbers are determined, the multiple shock absorbers are fixedly connected to the battery bracket through their respective mounting surfaces; wherein the mounting surfaces of the multiple shock absorbers are located on the same plane.

8. A power supply control method for a UPS power supply system, applied to a UPS power supply system, wherein the UPS power supply system comprises at least three battery modules, all of which are connected in parallel, and one end of the parallel-connected battery modules is connected to a power terminal, and the other end is connected to a load; the battery module is used to supply power to the load according to business needs; wherein, The business requirement includes the power supply time being the first time; it is characterized in that: the method comprises the following steps, S100, obtaining electrical variable data of each of the battery modules; S200, monitoring the working state of each of the battery modules according to the electrical variable data; wherein the working state includes a fault state and a normal state, and the battery modules in the fault state and the normal state are respectively a first battery module and a second battery module; S300, disconnecting the power output of the first battery module; S400, adjusting the power allocation value of each second battery module based on the power allocation strategy; S500, supplying power to the load based on the adjusted power allocation value; The power allocation strategy includes determining a power allocation value according to the remaining power of the second battery module so that the time for all the second battery modules to supply power to the load meets the first time, which includes: After determining the power allocation value in period t, predicting the power supply time of the second battery module according to the power allocation value to obtain a first power supply time prediction value; If the first power supply time prediction value is less than or equal to the first time, reducing the power allocation value of the t+1 period; If the first power supply time prediction value is greater than the first time, the second battery module supplies power according to the power allocation value in the t+1 period; and in the t+1 period, the power supply time is predicted according to the actual power supply power of the second battery module, the second power supply time prediction value is obtained, the power supply time change rate is calculated, and the power allocation value of the second battery module in the t+2 period is corrected according to the power supply time change rate; wherein the power supply time change rate is determined according to the following method: ; represents the power supply time change rate; T1 represents the first power supply time prediction value; T2 represents the second power supply time prediction value; Represents the absolute value of the difference between the first power supply time prediction value and the second power supply time prediction value.

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