A control method and control system for energy storage power supply

Abstract

The present application relates to the technical field of electric energy equipment, and in particular to a control method for an energy storage power supply and its control system; the method comprises: obtaining the real-time power of a discharged energy storage power supply, judging whether the discharged energy storage power supply is a power-deficient power supply based on the real-time power and a preset power threshold; if the discharged energy storage power supply is a power-deficient power supply, judging whether there are multiple discharged energy storage power supplies; if there is only one discharged energy storage power supply, controlling the discharged energy storage power supply to be connected in parallel with a backup energy storage power supply, adjusting the relative output power, and providing stable power supply to the load; if there are multiple discharged energy storage power supplies, judging the size relationship between the first output power and the rated power of the load, and adjusting the relative output power based on the size relationship, and providing stable power supply to the load. The present application helps to ensure that the energy storage power supply continuously and stably supplies power to the load.

Description

Technical Field

[0001] The present application relates to the technical field of electric energy equipment, and in particular to a control method for an energy storage power supply and a control system thereof. Background Art

[0002] The power industry was one of the earliest to implement reforms among the many monopoly sectors in the national economy. In recent years, my country's power industry has maintained rapid growth and achieved remarkable success, ranking first in the world in generator capacity and power generation. However, with the development of the Chinese economy, electricity consumption has remained substantial and is expected to continue to grow. Consequently, my country's power supply has been relatively tight. Furthermore, aging power lines and line failures caused by natural disasters frequently lead to localized power outages. However, many industries rely heavily on electricity, and power outages can easily cause significant economic losses and even threaten life and property safety (such as railways, aviation, and hospitals). Energy storage power supplies, as mobile power sources, can serve as a backup power source to power loads during power outages, thus playing a significant role in these situations.

[0003] Energy storage power supplies play an important role in various fields. However, the inventors believe that due to the limited storage capacity of energy storage power supplies, when the power stored in the energy storage power supply is consumed or when the energy storage power supply fails, the energy storage power supply needs to be temporarily replaced, resulting in the energy storage power supply stopping power supply or unstable output power, which brings inconvenience to users who require uninterrupted and stable power supply. Summary of the Invention

[0004] In order to help maintain the energy storage power supply to the load continuously and stably, the present application provides a control method and a control system of the energy storage power supply.

[0005] In the first aspect, the present application provides a control method for an energy storage power supply, which adopts the following technical solution:

[0006] A method for controlling an energy storage power supply, comprising:

[0007] Obtain the real-time power of the discharged energy storage power supply;

[0008] Based on the real-time power and the preset power threshold, determining whether the discharging energy storage power supply is a power-deficient power supply;

[0009] If the discharged energy storage power source is a power-deficient power source, determining whether the number of the discharged energy storage power sources is multiple;

[0010] If the number of the discharge energy storage power supply is one, control the discharge energy storage power supply and the backup energy storage power supply to be connected in parallel, adjust the relative output power, and provide stable power supply to the load;

[0011] If there are multiple discharged energy storage power supplies, the size relationship between the first output power and the rated power of the load is determined, and the relative output power is adjusted based on the size relationship to provide stable power supply to the load; wherein, the first output power is the sum of the maximum output powers of the remaining discharged energy storage power supplies excluding the depleted power supply, and the relative output power is the sum of the output power of the discharged energy storage power supply and the output power of the backup energy storage power supply.

[0012] By adopting the above technical solution, when a discharging energy storage power supply fails or is about to run out of power, the energy storage power supply can be replaced without stopping the power supply, which helps to maintain the energy storage power supply continuously supplying power to the load. By adjusting the relative output power, it helps to maintain a stable supply of power to the load by the energy storage power supply. This is convenient and fast, bringing great convenience to users who require uninterrupted and stable power supply.

[0013] Optionally, if there is only one discharging energy storage power supply, the specific steps of controlling the discharging energy storage power supply and the backup energy storage power supply to be connected in parallel, adjusting the relative output power, and stably supplying power to the load include:

[0014] Controlling the discharge energy storage power supply and the backup energy storage power supply to be connected in parallel;

[0015] Reduce the output power of the power supply with low power and increase the output power of the backup power supply;

[0016] The output power reduction amount of the power-deficient power supply is controlled to match the output power increase amount of the backup power supply, so as to provide stable power supply to the load.

[0017] The adoption of the above technical solution is conducive to maintaining continuous power supply of the energy storage power supply, and by controlling the reduction in the output power of the power supply with a power failure to match the increase in the output power of the backup power supply, it is helpful to maintain stable power supply of the energy storage power supply to the load.

[0018] Optionally, if there are multiple discharge energy storage power supplies, the specific steps of determining the magnitude relationship between the first output power and the rated power of the load, and adjusting the relative output power based on the magnitude relationship to stably supply power to the load include:

[0019] If the first output power is greater than the rated power, the output power of the depleted power source is reduced and the first output power is increased, where the first output power is the sum of the maximum output powers of the remaining discharged energy storage power sources excluding the depleted power source;

[0020] The output power of the depleted power supply is controlled to decrease so as to match the increase of the first output power, and the load is supplied with stable power.

[0021] By adopting the above technical solution, the reduction amount of the output power of the power-deficient power supply is controlled to match the increase amount of the first output power, which helps to maintain stable power supply of the energy storage power supply to the load.

[0022] Optionally, if there are multiple discharge energy storage power supplies, the specific steps of determining a magnitude relationship between the first output power and the rated power of the load, adjusting the relative output power based on the magnitude relationship, and stably supplying power to the load further include:

[0023] If the first output power is less than or equal to the rated power, controlling the discharging energy storage power supply to be connected in parallel with the backup energy storage power supply;

[0024] Reduce the output power of the power supply with low power and increase the output power of the backup power supply;

[0025] The output power reduction amount of the power-deficient power supply is controlled to match the output power increase amount of the backup power supply, and stable power supply is provided to the load.

[0026] By adopting the above technical solution, when the first output power is less than or equal to the rated power of the load, the discharge energy storage power supply and the backup energy storage power supply are connected in parallel to increase the power output, thereby helping to maintain stable operation of the load.

[0027] Optionally, the specific steps of controlling the discharging energy storage power supply to be connected in parallel with the backup energy storage power supply and stably supplying power to the load include:

[0028] Acquire the output voltage of the discharging energy storage power supply as a first voltage;

[0029] Obtaining the output voltage of the backup energy storage power supply as a second voltage;

[0030] determining whether the first voltage is consistent with the second voltage;

[0031] If the first voltage is consistent with the second voltage, controlling the discharging energy storage power supply to be connected in parallel with the backup energy storage power supply and stably supplying power to the load;

[0032] If the first voltage is inconsistent with the second voltage, the second voltage is adjusted to be equal to the first voltage, and the discharge energy storage power supply is controlled to be connected in parallel with the backup energy storage power supply to stably supply power to the load.

[0033] By adopting the above technical solution, the output voltage of the backup energy storage power supply is kept consistent with the output voltage of the discharge energy storage power supply, which helps to avoid the overload of the energy storage power supply and unstable operation of the load due to inconsistent output voltages.

[0034] Optionally, after controlling the discharging energy storage power supply to be connected in parallel with the backup energy storage power supply, the method further includes:

[0035] Obtaining the maximum output power of the backup energy storage power supply as the second output power;

[0036] Determining the magnitude relationship between the output power of the power-deficient power supply and the second output power;

[0037] If the output power of the deficient power supply is less than the second output power, reducing the output power of the deficient power supply and increasing the output power of the backup power supply;

[0038] Controlling the increase in the output power of the backup power supply to match the decrease in the output power of the power-deficient power supply;

[0039] If the output power of the depleted power supply is greater than or equal to the second output power, increasing the number of the backup energy storage power supplies connected in parallel with the discharging energy storage power supply;

[0040] Reducing the output power of the depleted power supply and increasing the total output power of the backup power supply;

[0041] The reduction amount of the output power of the power-deficient power supply is controlled to match the increase amount of the sum of the output powers of the backup power supplies.

[0042] By adopting the above technical solution, when the output power of the defunct power supply is less than the maximum output power of the connected backup energy storage power supply, that is, the second output power, the output power of the defunct power supply is controlled to match the second output power; when the output power of the defunct power supply is greater than or equal to the maximum output power of the connected backup energy storage power supply, that is, the second output power, the number of parallel backup energy storage power supplies is increased, the power output is increased, and the output power of the defunct power supply and the sum of the second output power are controlled to match, which helps to maintain the normal operation of the load.

[0043] Optionally, also include:

[0044] Obtaining the real-time temperature of the discharge energy storage power supply;

[0045] Based on the real-time temperature and a preset temperature threshold, determining whether the discharging energy storage power supply is an overheating power supply;

[0046] If the discharging energy storage power supply is not the overheating power supply, the power supply continues to be supplied to the load according to the current state.

[0047] By adopting the above technical solution, determining whether the discharge power supply is an overheated power supply not only helps to ensure that the discharge power supply continuously and stably supplies power to the load, but also helps to reduce the situation where the service life of the discharge energy storage power supply is shortened due to the excessive temperature of the power generation energy storage power supply, and avoid possible safety accidents.

[0048] Optionally, also include:

[0049] If the discharging energy storage power supply is an overheating power supply, determining whether there are multiple discharging energy storage power supplies;

[0050] If the number of the discharging energy storage power supply is one, the discharging energy storage power supply is controlled to be connected in parallel with the backup energy storage power supply and to stably supply power to the load.

[0051] By adopting the above technical solution, when the discharge energy storage power supply only includes an overheating power supply, the overheating power supply is controlled to be connected in parallel with the backup power supply, and the output power of the overheating power supply is reduced, thereby reducing its temperature, which helps to increase its service life and at the same time helps to reduce the occurrence of safety accidents caused by excessive temperature of the power generation energy storage power supply.

[0052] Optionally, also include:

[0053] If there are multiple discharging energy storage power supplies, determining the magnitude relationship between a fifth output power and the rated power of the load, wherein the fifth output power is the sum of the maximum output powers of the remaining discharging energy storage power supplies excluding the overheating power supply;

[0054] If the fifth output power is greater than the rated power, the sixth output power is reduced and the fifth output power is increased, the sixth output power being the output power of the overheated power supply;

[0055] controlling a reduction amount of the sixth output power to match an increase amount of the fifth output power;

[0056] If the fifth output power is less than or equal to the rated power, the discharging energy storage power supply is controlled to be connected in parallel with the backup energy storage power supply, and stably supply power to the load.

[0057] By adopting the above technical solution, when the discharging energy storage power supply includes an overheating power supply and other normal discharging energy storage power supplies, whether an additional parallel backup energy storage power supply is needed is determined by judging the magnitude relationship between the fifth output power and the rated power.

[0058] In a second aspect, the present application also discloses a control system for an energy storage power supply, which adopts the following technical solution:

[0059] A control system for an energy storage power supply, comprising:

[0060] An acquisition module, which is used to obtain the real-time power of the discharge energy storage power supply;

[0061] a first judgment module, configured to judge whether the discharging energy storage power supply is a power-deficient power supply based on the real-time power quantity and a preset power quantity threshold;

[0062] a second judgment module, for judging whether the number of the discharged energy storage power supplies is more than one if the discharged energy storage power supply is a power-deficient power supply;

[0063] a first execution module, configured to control the discharge energy storage power supply to be connected in parallel with the backup energy storage power supply if the number of the discharge energy storage power supply is one, adjust the relative output power, and stably supply power to the load;

[0064] a third judgment module, wherein if there are multiple discharging energy storage power supplies, the second judgment module is used to judge the magnitude relationship between the first output power and the rated power of the load;

[0065] A second execution module is configured to adjust the relative output power based on the magnitude relationship to provide stable power supply to the load.

[0066] By adopting the above technical solution, when a discharging energy storage power supply fails or is about to run out of power, the energy storage power supply can be replaced without stopping the power supply, which helps to maintain the energy storage power supply continuously supplying power to the load. By adjusting the relative output power, it helps to maintain a stable supply of power to the load by the energy storage power supply. This is convenient and fast, bringing great convenience to users who require uninterrupted and stable power supply.

[0067] In summary, this application includes at least one of the following beneficial technical effects:

[0068] When a discharging energy storage power supply fails or is about to run out of power, the energy storage power supply can be replaced without stopping the power supply, which helps to keep the energy storage power supply continuously supplying power to the load. By adjusting the relative output power, it helps to keep the energy storage power supply stable in supplying power to the load. This is convenient and fast, bringing great convenience to users who need uninterrupted and stable power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0069] Figure 1 This is a main flow chart of a control method for an energy storage power supply according to an embodiment of the present application;

[0070] Figure 2 yes Figure 1 Specific steps of step S400 are shown in the flowchart;

[0071] Figure 3 yes Figure 1Specific steps of step S500 are shown in the flowchart;

[0072] Figure 4 This is a module diagram of an energy storage power supply according to an embodiment of the present application.

[0073] Description of reference numerals:

[0074] 1. Acquisition module; 2. First judgment module; 3. Second judgment module; 4. First execution module; 5. Third judgment module; 6. Second execution module. DETAILED DESCRIPTION

[0075] In a first aspect, the present application discloses a method for controlling an energy storage power supply.

[0076] An embodiment of the present application discloses a method for controlling an energy storage power supply.

[0077] Reference Figure 1 A method for controlling an energy storage power supply includes steps S100 to S500:

[0078] Step S100: obtaining the real-time power of the discharging energy storage power supply.

[0079] Specifically, in this embodiment, the discharged energy storage power source refers to the energy storage power source that supplies power to the load. The real-time power of the discharged energy storage power source refers to the charge of the discharged energy storage power source, which can be calculated by multiplying the remaining power percentage by the storage capacity of the discharged energy storage power source. For example, if the current power of the discharged energy storage power source is 5% and the storage capacity of the discharged energy storage power source is 100Ah, then the real-time power of the discharged energy storage power source is 5Ah. In this embodiment, the discharged energy storage power source includes one or more energy storage power sources, and obtaining the real-time power of the discharged energy storage power source refers to obtaining the real-time power of each discharged energy storage power source.

[0080] Step S200: Based on the real-time power level and the preset power level threshold, determine whether the discharging energy storage power source is a power-deficient power source.

[0081] Specifically, in this embodiment, the preset power threshold can be 1Ah or 500mAh. For example, if the preset power threshold is 1Ah, when the real-time power of the discharged energy storage power supply is less than 1Ah, the discharged energy storage power supply is determined to be a low-power power supply, which is a power supply whose power is lower than the preset power threshold.

[0082] Step S300: If the discharged energy storage power source is a power-deficient power source, it is determined whether there are multiple discharged energy storage power sources.

[0083] Specifically, in this embodiment, since the rated power of the load may be greater than the maximum output power of the discharge energy storage power supply, in order to maintain the normal operation of the load, one or more energy storage power supplies need to be connected in parallel to increase the output power, so that the energy storage power supply can continuously supply power to the load.

[0084] Step S400: If the number of the discharging energy storage power supply is one, the discharging energy storage power supply is controlled to be connected in parallel with the backup energy storage power supply, and the relative output power is adjusted to stably supply power to the load.

[0085] Specifically, in this embodiment, when the discharged energy storage power supply only includes a depleted power supply, in order to ensure that the discharged energy storage power supply continues to supply power to the load, a backup energy storage power supply needs to be connected in parallel. The relative output power is the sum of the output power of the discharged energy storage power supply and the output power of the backup energy storage power supply.

[0086] It is worth noting that the output power of the newly connected backup energy storage power supply is adjusted to the minimum value, and when the load is working stably, the newly connected backup energy storage power supply is converted into a discharge energy storage power supply.

[0087] Specifically, in this embodiment, several backup power supplies are preset, and there is a complete circuit between each backup power supply and the load, but they are not connected. When the system controls a backup energy storage power supply to be connected in parallel with the discharge power supply, the circuit between the backup energy storage power supply and the discharge energy storage power supply is connected.

[0088] Step S500: If there are multiple discharging energy storage power supplies, determine the magnitude relationship between the first output power and the rated power of the load, and adjust the relative output power based on the magnitude relationship to stably supply power to the load.

[0089] Specifically, in this embodiment, the first output power is the sum of the maximum output powers of the remaining discharged energy storage power supplies excluding the depleted power supply.

[0090] Reference Figure 2 In one implementation of this embodiment, the specific steps of step S400 include steps S410 to S430:

[0091] Step S410: Control the discharging energy storage power supply and the backup energy storage power supply to be connected in parallel.

[0092] Step S420: reduce the output power of the power supply that has lost power, and increase the output power of the backup power supply.

[0093] Specifically, in this embodiment, the output power of the power supply with depleted power is gradually reduced, and the output power of the backup energy storage power supply is also gradually increased, avoiding the occurrence of output power jump adjustment, which helps to reduce the output power being too high or too low due to the output power jump adjustment, causing the load to work unstably or overloaded.

[0094] Specifically, in this embodiment, the internal resistance of the energy storage power supply can be changed by providing a sliding rheostat, thereby adjusting the output power of the energy storage power supply.

[0095] Step S430: Control the reduction amount of the output power of the power-deficient power supply to match the increase amount of the output power of the backup power supply, so as to provide stable power supply to the load.

[0096] Specifically, in this embodiment, the reduction amount is the amount of reduction, and the increase amount is the amount of increase. The reduction amount of the output power of the power-deficient power supply is always kept matched with the increase amount of the output power of the backup power supply. That is, the output power of the backup power supply is increased by the amount by which the output power of the power-deficient power supply is reduced.

[0097] Reference Figure 3 In one implementation of this embodiment, the specific steps of step S500 include steps S510 to S550:

[0098] Step S510: If the first output power is greater than the rated power, the output power of the power supply with insufficient power is reduced, and the first output power is increased.

[0099] Specifically, in this embodiment, the first output power is the sum of the maximum output powers of the remaining discharged energy storage power supplies excluding the depleted power supply. When the first output power is greater than the rated power, that is, among all the discharged energy storage power supplies, there is a situation where the discharged energy storage power supply is not at the maximum output power. Of course, in this embodiment, the real-time output power of all the discharged energy storage power supplies does not exceed the maximum output power to prevent the discharged energy storage power supplies from overloading the output.

[0100] Step S520: controlling the reduction amount of the output power of the power-deficient power source to match the increase amount of the first output power, and providing stable power to the load.

[0101] Specifically, in this embodiment, the output power of the depleted power supply is gradually reduced, while the first output power is gradually increased, avoiding sudden changes in output power. This helps reduce the risk of excessively high or low output power, which can lead to unstable load operation or overload. Increasing the first output power allows the discharged energy storage power supply to provide stable power to the load, eliminating the need for connecting an additional backup energy storage power supply in parallel and helping to fully utilize the power in the discharged energy storage power supply.

[0102] Step S530: If the first output power is less than or equal to the rated power, control the discharging energy storage power supply and the backup energy storage power supply to be connected in parallel.

[0103] When the first output power is less than or equal to the rated power, that is, other discharged energy storage power supplies except the depleted power supply are insufficient to support stable operation of the load, it is necessary to increase the power output by connecting it in parallel with the backup energy storage power supply.

[0104] Step S540: reduce the output power of the power supply that has lost power, and increase the output power of the backup power supply.

[0105] Specifically, this step is operated in the same manner as step 420 .

[0106] Step 550: Control the output power reduction amount of the power-deficient power supply to match the output power increase amount of the backup power supply, and provide stable power supply to the load.

[0107] Specifically, this step is operated in the same manner as step 430 .

[0108] In one implementation of this embodiment, the specific steps of controlling the discharging energy storage power supply to be connected in parallel with the backup energy storage power supply and stably supplying power to the load include steps S440 to S480:

[0109] Step S440: obtaining a first voltage.

[0110] Specifically, in this embodiment, the first voltage is the output voltage of the discharge energy storage power supply.

[0111] Step S450: obtaining a second voltage.

[0112] Specifically, in this embodiment, the second voltage is the output voltage of the backup energy storage power supply.

[0113] Step S460: Determine whether the first voltage is consistent with the second voltage.

[0114] Step S470: If the first voltage is consistent with the second voltage, the discharge energy storage power supply is controlled to be connected in parallel with the backup energy storage power supply and supply power to the load.

[0115] Step S480: If the first voltage is inconsistent with the second voltage, the second voltage is adjusted to be equal to the first voltage, and then the discharge energy storage power supply and the backup energy storage power supply are controlled to be connected in parallel to supply power to the load.

[0116] Specifically, in this embodiment, the output voltage of the backup power supply connected in parallel with the discharged energy storage power supply must be consistent with the output voltage of the discharged energy storage power supply. As is well known, when two energy storage power supplies with inconsistent output voltages are connected in parallel, the energy storage power supply with the higher output voltage will charge the energy storage power supply with the lower output voltage. This energy storage power supply with the higher output voltage is prone to over-discharge and damage, while the energy storage power supply with the lower output voltage is prone to over-charging and damage. Therefore, maintaining the output voltage of the backup energy storage power supply consistent with the output voltage of the discharged energy storage power supply helps to increase the service life of the energy storage power supply and also helps to reduce the occurrence of safety accidents. Furthermore, when the output voltages of the two parallel energy storage power supplies are the same, the output power increases.

[0117] Specifically, in this embodiment, when a new standby energy storage power supply is connected in parallel, the operations of steps S440 to S480 need to be performed.

[0118] In one implementation of this embodiment, after controlling the discharging energy storage power supply and the backup energy storage power supply to be connected in parallel, steps S531 to S534 are further included:

[0119] Step S531: Obtain the second output power.

[0120] Specifically, in this embodiment, the second output power is the maximum output power of the backup energy storage power supply.

[0121] Step S532: Determine the magnitude relationship between the output power of the power-deficient power source and the second output power.

[0122] Step S533: If the output power of the failed power source is less than the second output power, the output power of the failed power source is reduced, and the output power of the backup power source is increased.

[0123] Specifically, in this embodiment, when the output power of the depleted power supply is less than the second output power, it is only necessary to connect a backup energy storage power supply in parallel to maintain stable operation of the load.

[0124] Step S534: controlling the increase amount of the fourth output power to match the decrease amount of the output power of the power supply with insufficient power.

[0125] Specifically, in this embodiment, the output power of the power supply with a power failure is gradually reduced, and the output power is also gradually increased, avoiding the output power jump adjustment, which helps to reduce the output power being too high or too low due to the output power jump adjustment, causing the load to work unstably or overloaded.

[0126] Step S535: If the output power of the depleted power supply is greater than or equal to the second output power, the number of backup energy storage power supplies connected in parallel with the discharged energy storage power supply is increased.

[0127] Specifically, in this embodiment, when the output power of the depleted power supply is greater than or equal to the second output power, it means that connecting one backup energy storage power supply in parallel is not sufficient to enable the load to operate stably, and it is necessary to continue to increase the number of parallel backup energy storage power supplies until the load can operate stably.

[0128] Step S536: reduce the output power of the power supply with low power and increase the total output power of the backup power supplies.

[0129] Specifically, in this embodiment, all backup energy storage power supplies are regarded as a whole, and the sum of the output powers of the backup power supplies is kept gradually increasing.

[0130] Step S537: controlling the reduction amount of the output power of the power-deficient power source to match the increase amount of the sum of the output powers of the backup power sources.

[0131] Specifically, it helps to ensure that the energy storage power supply continuously and stably supplies power to the load.

[0132] In one implementation of this embodiment, a method for controlling an energy storage power supply further includes steps S110A to S130A:

[0133] Step S110A: Acquire the real-time temperature of the discharging energy storage power supply.

[0134] Specifically, in this embodiment, obtaining the real-time temperature of the discharging energy storage power supply refers to obtaining the real-time temperature of each discharging energy storage power supply.

[0135] Step S120A: Based on the real-time temperature and the preset temperature threshold, determine whether the discharging energy storage power supply is an overheating power supply.

[0136] Specifically, in this embodiment, the overheated power supply refers to a discharge energy storage power supply whose real-time temperature exceeds a preset temperature threshold, and the temperature threshold may be 45 degrees Celsius or 50 degrees Celsius.

[0137] Step S130A: If the discharging energy storage power supply is not an overheated power supply, it continues to supply power to the load according to the current state.

[0138] Specifically, in this embodiment, if the discharging energy storage power supply is not an overheated power supply, it means that the discharging energy storage power supply is supplying power normally and has not exceeded the maximum output power.

[0139] Determining whether the discharge power supply is an overheated power supply not only helps to maintain normal power supply of the discharge power supply, but also helps to reduce the situation where the service life of the discharge energy storage power supply is shortened due to the excessive temperature of the power generation energy storage power supply, and avoid possible safety accidents.

[0140] In one implementation of this embodiment, a method for controlling an energy storage power supply further includes steps S140A to S150A:

[0141] Step S140A: If the discharging energy storage power source is an overheating power source, determine whether there are multiple discharging energy storage power sources.

[0142] Step S150A: If the number of the discharging energy storage power supply is one, control the discharging energy storage power supply to be connected in parallel with the backup energy storage power supply and supply power to the load.

[0143] Specifically, in this embodiment, after the discharging energy storage power supply is controlled to continue to be connected in parallel with the backup energy storage power supply, the output power of the overheated power supply is gradually reduced, and the output power of the backup energy storage power supply is gradually increased. The increase in the output power of the backup energy storage power supply is controlled to be equal to the decrease in the output power of the discharging energy storage power supply. This helps to reduce the situation where the service life of the discharging energy storage power supply is shortened due to the excessive temperature of the generating energy storage power supply.

[0144] In one implementation of this embodiment, a method for controlling an energy storage power supply further includes steps S160A to S190A:

[0145] Step S160A: If there are multiple discharging energy storage power supplies, determine the relationship between the third output power and the rated power of the load.

[0146] Specifically, in this embodiment, the third output power is the sum of the maximum output powers of the remaining discharge energy storage power supplies excluding the overheating power supply.

[0147] Step S170A: If the third output power is greater than the rated power, the fourth output power is reduced and the third output power is increased.

[0148] Specifically, in this embodiment, the fourth output power is the output power of the overheating power supply.

[0149] Step S180A: controlling the reduction amount of the fourth output power to match the increase amount of the third output power.

[0150] Step S190A: If the third output power is less than or equal to the rated power, the discharging energy storage power supply is controlled to be connected in parallel with the backup energy storage power supply and supply power to the load.

[0151] Specifically, in this embodiment, it is also included to determine whether the newly connected backup energy storage power supply can meet the requirements of stable load operation. If not, it is necessary to increase the number of backup energy storage power supplies connected in parallel.

[0152] The implementation principle of a control method for an energy storage power supply in an embodiment of the present application is as follows: obtaining the real-time power of a discharged energy storage power supply, judging whether the discharged energy storage power supply is a power-deficient power supply based on the real-time power and a preset power threshold, and if the discharged energy storage power supply is a power-deficient power supply, judging whether there are multiple discharged energy storage power supplies; if there is only one discharged energy storage power supply, controlling the discharged energy storage power supply and the backup energy storage power supply to be connected in parallel, adjusting the relative output power, and providing stable power supply to the load; if there are multiple discharged energy storage power supplies, judging the size relationship between the first output power and the rated power of the load, and adjusting the relative output power based on the size relationship, and providing stable power supply to the load.

[0153] In a second aspect, the present application also discloses a control system for an energy storage power supply.

[0154] Reference Figure 4 , a control system for an energy storage power supply, comprising:

[0155] Acquisition module 1, which is used to obtain the real-time power of the discharge energy storage power supply;

[0156] The first judgment module 2 is used to judge whether the discharged energy storage power supply is a power-deficient power supply based on the real-time power supply and the preset power supply threshold;

[0157] The second judgment module 3 is used to judge whether the number of the discharged energy storage power supplies is multiple if the discharged energy storage power supply is a power-deficient power supply;

[0158] A first execution module 4, if the number of the discharge energy storage power supply is one, is used to control the discharge energy storage power supply and the backup energy storage power supply to be connected in parallel, adjust the relative output power, and provide stable power supply to the load;

[0159] A third judgment module 5 is used to judge the relationship between the first output power and the rated power of the load if there are multiple discharging energy storage power sources;

[0160] The second execution module 6 is used to adjust the relative output power based on the size relationship to provide stable power supply to the load.

[0161] The implementation principle of a control system of an energy storage power supply in an embodiment of the present application is as follows: a first module obtains the real-time power of a discharged energy storage power supply and sends the real-time power to a first judgment module 2; the first judgment module 2 judges whether the discharged energy storage power supply is a power-deficient power supply based on the real-time power and a preset power threshold; when the discharged energy storage power supply is a power-deficient power supply, the second judgment module 3 judges whether there are multiple discharged energy storage power supplies; when there is only one discharged energy storage power supply, the first execution module 4 controls the discharged energy storage power supply and the backup energy storage power supply to be connected in parallel, adjusts the relative output power, and supplies stable power to the load; when there are multiple discharged energy storage power supplies, the third judgment module 5 judges the size relationship between the first output power and the rated power of the load; the second execution module 6 adjusts the relative output power based on the size relationship, and supplies stable power to the load, thereby achieving the same technical effect as the aforementioned energy storage power supply control method.

[0162] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A method for controlling an energy storage power supply, characterized in that: include: Obtain the real-time power of the discharged energy storage power supply; Based on the real-time power and the preset power threshold, determining whether the discharging energy storage power supply is a power-deficient power supply; If the discharged energy storage power source is a power-deficient power source, determining whether the number of the discharged energy storage power sources is multiple; If the number of the discharge energy storage power supply is one, control the discharge energy storage power supply and the backup energy storage power supply to be connected in parallel, adjust the relative output power, and provide stable power supply to the load; If there are multiple discharging energy storage power supplies, determine the magnitude relationship between the first output power and the rated power of the load, and adjust the relative output power based on the magnitude relationship to provide stable power supply to the load; wherein the first output power is the sum of the maximum output powers of the remaining discharging energy storage power supplies excluding the power-deficient power supply, and the relative output power is the sum of the output power of the discharging energy storage power supply and the output power of the backup energy storage power supply; Wherein, if there are multiple discharge energy storage power supplies, the specific steps of determining the magnitude relationship between the first output power and the rated power of the load, and adjusting the relative output power based on the magnitude relationship to stably supply power to the load include: If the first output power is greater than the rated power, the output power of the depleted power source is reduced and the first output power is increased, where the first output power is the sum of the maximum output powers of the remaining discharged energy storage power sources excluding the depleted power source; Controlling the reduction amount of the output power of the power-deficient power supply to match the increase amount of the first output power, and stably supplying power to the load; If the first output power is less than or equal to the rated power, controlling the discharging energy storage power supply to be connected in parallel with the backup energy storage power supply; Reduce the output power of the power supply with low power and increase the output power of the backup energy storage power supply; The output power reduction amount of the power-deficient power supply is controlled to match the output power increase amount of the backup energy storage power supply, and stable power supply is provided to the load.

2. The method for controlling an energy storage power supply according to claim 1, wherein: If the number of the discharge energy storage power supply is one, the specific steps of controlling the discharge energy storage power supply and the backup energy storage power supply to be connected in parallel, adjusting the relative output power, and stably supplying power to the load include: Controlling the discharge energy storage power supply and the backup energy storage power supply to be connected in parallel; Reduce the output power of the depleted power supply and increase the output power of the backup energy storage power supply; The output power reduction amount of the power-deficient power supply is controlled to match the output power increase amount of the backup energy storage power supply, so as to provide stable power supply to the load.

3. The method for controlling an energy storage power supply according to claim 1, wherein: The specific steps of controlling the discharging energy storage power supply to be connected in parallel with the backup energy storage power supply and stably supplying power to the load include: Acquire the output voltage of the discharging energy storage power supply as a first voltage; Obtaining the output voltage of the backup energy storage power supply as a second voltage; determining whether the first voltage is consistent with the second voltage; If the first voltage is consistent with the second voltage, controlling the discharging energy storage power supply to be connected in parallel with the backup energy storage power supply and stably supplying power to the load; If the first voltage is inconsistent with the second voltage, the second voltage is adjusted to be equal to the first voltage, and the discharge energy storage power supply is controlled to be connected in parallel with the backup energy storage power supply to stably supply power to the load.

4. A method for controlling an energy storage power supply according to claim 1 or claim 2, characterized in that: After controlling the discharging energy storage power supply and the backup energy storage power supply to be connected in parallel, the method further includes: Obtaining the maximum output power of the backup energy storage power supply as the second output power; Determining a magnitude relationship between the output power of the power-deficient power supply and the second output power; If the output power of the deficient power supply is less than the second output power, reducing the output power of the deficient power supply and increasing the output power of the backup energy storage power supply; Controlling the increase in the output power of the backup energy storage power supply to match the decrease in the output power of the power-deficient power supply; If the output power of the depleted power supply is greater than or equal to the second output power, increasing the number of the backup energy storage power supplies connected in parallel with the discharging energy storage power supply; Reduce the output power of the depleted power supply and increase the total output power of the backup energy storage power supply; The reduction amount of the output power of the power-deficient power supply is controlled to match the increase amount of the sum of the output powers of the backup energy storage power supplies.

5. The method for controlling an energy storage power supply according to claim 1, wherein: Also includes: Obtaining the real-time temperature of the discharge energy storage power supply; Based on the real-time temperature and a preset temperature threshold, determining whether the discharging energy storage power supply is an overheating power supply; If the discharging energy storage power supply is not the overheating power supply, the power supply continues to be supplied to the load according to the current state.

6. The method for controlling an energy storage power supply according to claim 5, characterized in that: Also includes: If the discharging energy storage power supply is an overheating power supply, determining whether there are multiple discharging energy storage power supplies; If the number of the discharging energy storage power supply is one, the discharging energy storage power supply is controlled to be connected in parallel with the backup energy storage power supply and to stably supply power to the load.

7. The method for controlling an energy storage power supply according to claim 6, wherein: Also includes: If there are multiple discharging energy storage power supplies, determining the magnitude relationship between a third output power and the rated power of the load, wherein the third output power is the sum of the maximum output powers of the remaining discharging energy storage power supplies excluding the overheating power supply; If the third output power is greater than the rated power, the fourth output power is reduced and the third output power is increased, the fourth output power being the output power of the overheated power supply; controlling a reduction amount of the fourth output power to match an increase amount of the third output power; If the third output power is less than or equal to the rated power, the discharging energy storage power supply is controlled to be connected in parallel with the backup energy storage power supply, and stably supply power to the load.

8. A control system for an energy storage power supply, characterized in that: include: An acquisition module (1), the acquisition module (1) is used to acquire the real-time power of the discharge energy storage power supply; A first judgment module (2), the first judgment module (2) is used to judge whether the discharge energy storage power supply is a power-deficient power supply based on the real-time power supply and a preset power supply threshold; A second judgment module (3) is used to judge whether the number of the discharged energy storage power supplies is plural if the discharged energy storage power supply is a power-deficient power supply; A first execution module (4), if the number of the discharge energy storage power supply is one, the first execution module (4) is used to control the discharge energy storage power supply and the backup energy storage power supply to be connected in parallel, adjust the relative output power, and stably supply power to the load; A third judgment module (5), if the number of the discharge energy storage power supplies is multiple, the third judgment module (5) is used to judge the magnitude relationship between the first output power and the rated power of the load; A second execution module (6), the second execution module (6) is used to adjust the relative output power based on the magnitude relationship to stably supply power to the load; Wherein, if there are multiple discharge energy storage power supplies, the specific steps of determining the magnitude relationship between the first output power and the rated power of the load, and adjusting the relative output power based on the magnitude relationship to stably supply power to the load include: If the first output power is greater than the rated power, the output power of the depleted power source is reduced and the first output power is increased, where the first output power is the sum of the maximum output powers of the remaining discharged energy storage power sources excluding the depleted power source; Controlling the reduction amount of the output power of the power-deficient power supply to match the increase amount of the first output power, and stably supplying power to the load; If the first output power is less than or equal to the rated power, controlling the discharging energy storage power supply to be connected in parallel with the backup energy storage power supply; Reduce the output power of the power supply with low power and increase the output power of the backup energy storage power supply; The output power reduction amount of the power-deficient power supply is controlled to match the output power increase amount of the backup energy storage power supply, and stable power supply is provided to the load.

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