A method and terminal for improving the energy efficiency of a fully charged battery under calibration

Abstract

This invention discloses a method and terminal for improving the energy efficiency of full-charge calibration of energy storage batteries. First, during off-peak electricity hours, it is determined whether the weather is sunny or cloudy. If so, step S2 is executed; otherwise, full-charge calibration of the battery's State of Charge (SOC) is performed. Next, it is calculated and determined whether the expected photovoltaic power generation for the day is less than the average daily power consumption of the energy storage battery over a first preset number of days prior to the day. If so, full-charge calibration of the battery's SOC is performed; otherwise, it is not. This invention, when determining whether full-charge calibration of the energy storage battery is necessary, assesses the photovoltaic capacity based on the day's weather conditions and compares the expected photovoltaic power generation with the average daily power consumption of the energy storage battery over a past period. This ensures that the energy storage battery has good charging and discharging efficiency while improving the utilization rate of the photovoltaic power generated, thereby improving the energy efficiency of full-charge calibration of the energy storage battery.

Description

Technical Field

[0001] This invention relates to the field of full-charge calibration technology for energy storage systems, and particularly to a method and terminal for improving the energy efficiency utilization rate of full-charge calibration of energy storage batteries. Background Technology

[0002] New energy sources will be an effective alternative to traditional fossil fuels. In integrated power generation and energy storage systems composed of energy storage batteries, photovoltaic, and wind power generation, improving the utilization of photovoltaic and wind power is of great significance for improving the overall utilization rate of new energy sources in the power generation and energy storage system.

[0003] Existing full-charge calibration schemes for energy storage batteries will fully charge the batteries during off-peak hours. However, if the batteries are fully charged, the charging piles and other electrical loads within the station will not be able to consume the photovoltaic power generated that day, resulting in ineffective utilization of the photovoltaic power and waste. Furthermore, after considering the daily photovoltaic power generation, it becomes difficult to determine whether full-charge calibration is necessary, leading to a significant decrease in the energy efficiency utilization rate of full-charge calibration. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a method and terminal for improving the energy efficiency utilization rate of a fully charged battery during calibration.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0006] A method for improving the energy efficiency utilization rate of a fully charged energy storage battery includes the following steps:

[0007] S1. Determine whether the weather is sunny or cloudy during off-peak hours. If so, proceed to step S2; otherwise, perform battery SOC full charge calibration.

[0008] S2. Calculate and determine whether the expected photovoltaic power generation on the day is less than the average daily power consumption of the energy storage battery in the first preset number of days prior to the day. If so, perform battery SOC full charge calibration; otherwise, do not perform battery SOC full charge calibration.

[0009] To solve the above-mentioned technical problems, another technical solution adopted by the present invention is as follows:

[0010] A terminal for improving the energy efficiency utilization rate of a fully charged battery includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it performs the following steps:

[0011] S1. Determine whether the weather is sunny or cloudy during off-peak hours. If so, proceed to step S2; otherwise, perform battery SOC full charge calibration.

[0012] S2. Calculate and determine whether the expected photovoltaic power generation on the day is less than the average daily power consumption of the energy storage battery in the first preset number of days prior to the day. If so, perform battery SOC full charge calibration; otherwise, do not perform battery SOC full charge calibration.

[0013] The beneficial effects of this invention are as follows: It provides a method and terminal for improving the energy efficiency utilization rate of energy storage battery full charge calibration. When determining whether the energy storage battery needs to be calibrated for full charge at SOC, it judges whether the photovoltaic power generation is sufficient based on the weather conditions of the day, and compares the expected power generation of the photovoltaic with the average daily power consumption of the energy storage battery over the past period. This ensures that the energy storage battery has good charging and discharging efficiency while improving the utilization rate of the electricity generated by the photovoltaic, thereby improving the energy efficiency utilization rate of the energy storage battery full charge calibration. Attached Figure Description

[0014] Figure 1 This is a schematic diagram illustrating the steps of a method for improving the energy efficiency utilization rate of a fully charged battery under full-charge calibration according to an embodiment of the present invention.

[0015] Figure 2 This is a flowchart illustrating a method for improving the energy efficiency utilization rate of a fully charged battery during calibration, according to an embodiment of the present invention.

[0016] Figure 3 This is a schematic diagram of the structure of a terminal for improving the energy efficiency utilization rate of a fully charged battery according to an embodiment of the present invention.

[0017] Label Explanation:

[0018] 1. A terminal for improving the energy efficiency utilization rate of a fully charged battery under full-charge calibration; 2. A processor; 3. A memory. Detailed Implementation

[0019] To explain in detail the technical content, objectives, and effects of the present invention, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0020] Please refer to Figure 1 and Figure 2 A method for improving the energy efficiency utilization rate of a fully charged battery during calibration, comprising the following steps:

[0021] S1. Determine whether the weather is sunny or cloudy during off-peak hours. If so, proceed to step S2; otherwise, perform battery SOC full charge calibration.

[0022] S2. Calculate and determine whether the expected photovoltaic power generation on the day is less than the average daily power consumption of the energy storage battery in the first preset number of days prior to the day. If so, perform battery SOC full charge calibration; otherwise, do not perform battery SOC full charge calibration.

[0023] As can be seen from the above description, the beneficial effects of the present invention are as follows: when determining whether the energy storage battery needs to be calibrated for full charge of the battery SOC, the photovoltaic power generation capacity is determined based on the weather conditions of the day, and the expected power generation of the photovoltaic power generation and the average daily power consumption of the energy storage battery in the past period are compared. This ensures that the energy storage battery has good charging and discharging efficiency while improving the utilization rate of the power generated by the photovoltaic power generation, thereby improving the energy efficiency utilization rate of the energy storage battery during full charge calibration.

[0024] Furthermore, the procedure before step S1 includes:

[0025] S00. During off-peak hours, determine whether the energy storage battery meets the prerequisites for performing battery SOC full charge calibration. If yes, proceed to step S01; otherwise, do not perform battery SOC full charge calibration.

[0026] S01. Determine whether there is a SOC difference between two single cabinets in the current energy storage battery that is greater than or equal to a first preset threshold. If so, perform battery SOC full charge calibration; otherwise, perform step S1.

[0027] As can be seen from the above description, if the energy storage battery can meet the prerequisite for full charge calibration of battery SOC, it is determined whether there is a SOC difference between two single cabinets in the energy storage battery that is greater than or equal to the first preset threshold. In this case, if the SOC difference between the two single cabinets is too large, full charge calibration of battery SOC is forcibly performed to avoid the energy storage battery being in a state of significantly reduced charging and discharging efficiency and to ensure that the energy storage battery can operate normally.

[0028] Furthermore, the aforementioned preconditions are specifically as follows:

[0029] Currently, there is a SOC difference between two individual cabinets in the energy storage battery that is greater than the second preset threshold.

[0030] The second preset threshold is less than the first preset threshold.

[0031] As can be seen from the above description, the condition that the SOC difference between two single cabinets is greater than the second preset threshold is set as a prerequisite. That is, full charge calibration is only performed when the SOC between the single cabinets reaches a certain imbalance. This reduces the workload of the system and reduces operating losses while ensuring the normal operation of the energy storage battery.

[0032] Furthermore, the aforementioned preconditions also include:

[0033] The number of days since the last full charge calibration of the energy storage battery is greater than the second preset number of days.

[0034] As can be seen from the above description, setting a reasonable second preset number of days can prevent the energy storage battery from undergoing full charge calibration too frequently, and can also prevent it from not undergoing full charge calibration for a long time due to the introduction of electricity generated by photovoltaics, thus ensuring the normal operation of the energy storage battery.

[0035] Furthermore, the first preset number of days is 6-8 days.

[0036] As can be seen from the above description, the first preset number of days is 6-8 days, so as to more accurately determine whether the current power load can consume the power generated by the photovoltaic on that day, thereby making effective use of the power generated by the photovoltaic.

[0037] Please refer to Figure 3 A terminal 1 for improving the energy efficiency utilization rate of a fully charged energy storage battery includes a memory 3, a processor 2, and a computer program stored in the memory 3 and executable on the processor 2. When the processor 2 executes the computer program, it performs the following steps:

[0038] S1. Determine whether the weather is sunny or cloudy during off-peak hours. If so, proceed to step S2; otherwise, perform battery SOC full charge calibration.

[0039] S2. Calculate and determine whether the expected photovoltaic power generation on the day is less than the average daily power consumption of the energy storage battery in the first preset number of days prior to the day. If so, perform battery SOC full charge calibration; otherwise, do not perform battery SOC full charge calibration.

[0040] As can be seen from the above description, the beneficial effects of the present invention are as follows: when determining whether the energy storage battery needs to be calibrated for full charge of the battery SOC, the photovoltaic power generation capacity is determined based on the weather conditions of the day, and the expected power generation of the photovoltaic power generation and the average daily power consumption of the energy storage battery in the past period are compared. This ensures that the energy storage battery has good charging and discharging efficiency while improving the utilization rate of the power generated by the photovoltaic power generation, thereby improving the energy efficiency utilization rate of the energy storage battery during full charge calibration.

[0041] Furthermore, the procedure before step S1 includes:

[0042] S00. During off-peak hours, determine whether the energy storage battery meets the prerequisites for performing battery SOC full charge calibration. If yes, proceed to step S01; otherwise, do not perform battery SOC full charge calibration.

[0043] S01. Determine whether there is a SOC difference between two single cabinets in the current energy storage battery that is greater than or equal to a first preset threshold. If so, perform battery SOC full charge calibration; otherwise, perform step S1.

[0044] As can be seen from the above description, if the energy storage battery can meet the prerequisite for full charge calibration of battery SOC, it is determined whether there is a SOC difference between two single cabinets in the energy storage battery that is greater than or equal to the first preset threshold. In this case, if the SOC difference between the two single cabinets is too large, full charge calibration of battery SOC is forcibly performed to avoid the energy storage battery being in a state of significantly reduced charging and discharging efficiency and to ensure that the energy storage battery can operate normally.

[0045] Furthermore, the aforementioned preconditions are specifically as follows:

[0046] Currently, there is a SOC difference between two individual cabinets in the energy storage battery that is greater than the second preset threshold.

[0047] The second preset threshold is less than the first preset threshold.

[0048] As can be seen from the above description, the condition that the SOC difference between two single cabinets is greater than the second preset threshold is set as a prerequisite. That is, full charge calibration is only performed when the SOC between the single cabinets reaches a certain imbalance. This reduces the workload of the system and reduces operating losses while ensuring the normal operation of the energy storage battery.

[0049] Furthermore, the aforementioned preconditions also include:

[0050] The number of days since the last full charge calibration of the energy storage battery is greater than the second preset number of days.

[0051] As can be seen from the above description, setting a reasonable second preset number of days can prevent the energy storage battery from undergoing full charge calibration too frequently, and can also prevent it from not undergoing full charge calibration for a long time due to the introduction of electricity generated by photovoltaics, thus ensuring the normal operation of the energy storage battery.

[0052] Furthermore, the first preset number of days is 6-8 days.

[0053] As can be seen from the above description, the first preset number of days is 6-8 days, so as to more accurately determine whether the current power load can consume the power generated by the photovoltaic on that day, thereby making effective use of the power generated by the photovoltaic.

[0054] The method and terminal for improving the energy efficiency of energy storage batteries during full-charge calibration according to the present invention are applicable to scenarios involving full-charge calibration of energy storage batteries. The following is a detailed description of the specific implementation methods:

[0055] Please refer to Figure 1 and Figure 2 Embodiment 1 of the present invention is as follows:

[0056] A method to improve the energy efficiency of a fully charged battery under calibration, such as Figure 1 and Figure 2 As shown, the steps include:

[0057] S00. During off-peak hours, determine whether the energy storage battery meets the prerequisites for performing battery SOC full charge calibration. If yes, proceed to step S01; otherwise, do not perform battery SOC full charge calibration.

[0058] In this embodiment, there are two preconditions, and either one needs to be met. The two preconditions are as follows:

[0059] 1. Currently, there is a SOC difference between two individual cabinets in the energy storage battery that is greater than the second preset threshold;

[0060] 2. The number of days since the last full charge calibration of the battery SOC is greater than the second preset number of days.

[0061] The second preset threshold value ranges from 4% to 6%, preferably 5%; the second preset number of days ranges from 6 to 8 days, preferably 7 days.

[0062] S01. Determine whether there is a SOC difference between two single cabinets in the current energy storage battery that is greater than or equal to the first preset threshold. If so, perform battery SOC full charge calibration; otherwise, proceed to step S1.

[0063] In this embodiment, the first preset threshold value ranges from 9% to 11%, preferably 10%. If the SOC difference between two single cabinets in the current energy storage battery is greater than or equal to the first preset threshold, it indicates that the SOC difference between the single cabinets of the energy storage system is too large, and the charging and discharging efficiency of the energy storage battery has been greatly reduced. In order to ensure that the energy storage battery can be used normally, it is necessary to force the battery SOC full charge calibration.

[0064] S1. Determine whether the weather is sunny or cloudy during off-peak hours. If so, proceed to step S2; otherwise, perform battery SOC full charge calibration.

[0065] In this embodiment, if the weather is sunny or cloudy on the day, it means that the photovoltaic system can generate a certain amount of electricity and needs to be effectively utilized; otherwise, it means that the photovoltaic system cannot generate electricity on the day, so the battery SOC full charge calibration is performed directly.

[0066] S2. Calculate and determine whether the expected photovoltaic power generation on the day is less than the average daily power consumption of the energy storage battery in the first preset number of days prior to the day. If so, perform battery SOC full charge calibration; otherwise, do not perform battery SOC full charge calibration.

[0067] In this embodiment, if the expected photovoltaic power generation on a given day is less than the average daily power consumption of the energy storage battery over a first preset number of days prior to that day, it indicates that the daily electrical load can consume the energy generated by the photovoltaic system without needing to be absorbed and stored by the energy storage battery. Therefore, a full charge calibration of the battery's State of Charge (SOC) can be performed to bring the battery's SOC value to 100%, maintaining its optimal power supply state. Otherwise, it indicates that the daily electrical load cannot consume the energy generated by the photovoltaic system, and the excess energy needs to be absorbed and stored by the energy storage battery. Therefore, a full charge calibration of the battery's SOC is not performed, avoiding waste of photovoltaic power generation. This improves energy utilization efficiency and increases the energy efficiency of the full charge calibration without affecting the normal use of the energy storage battery's SOC calibration. The first preset number of days is 6-8 days, preferably 7 days.

[0068] Please refer to Figure 3 Embodiment two of the present invention is as follows:

[0069] A terminal 1 for improving the energy efficiency utilization rate of a fully charged battery under calibration, such as... Figure 3 As shown, it includes a memory 3, a processor 2, and a computer program stored on the memory 3 and executable on the processor 2. When the processor 2 executes the computer program, it implements the steps of the above embodiment one.

[0070] In summary, the present invention provides a method and terminal for improving the energy efficiency utilization rate of energy storage battery full charge calibration. When determining whether the energy storage battery needs to undergo full charge calibration, the method determines whether the photovoltaic power generation capacity is available based on the weather conditions of the day, and compares the expected power generation of the photovoltaic power generation with the average daily power consumption of the energy storage battery over the past period. This ensures that the energy storage battery has good charge and discharge efficiency while improving the utilization rate of the electricity generated by the photovoltaic power generation, thereby improving the energy efficiency utilization rate of the energy storage battery full charge calibration.

[0071] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent modifications made based on the content of the present invention specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A method for improving the energy efficiency utilization rate of a fully charged energy storage battery during calibration, characterized in that, Including the following steps: S1. Determine whether the weather is sunny or cloudy during off-peak hours. If so, proceed to step S2; otherwise, perform battery SOC full charge calibration. S2. Calculate and determine whether the expected photovoltaic power generation on the day is less than the average daily power consumption of the energy storage battery in the first preset number of days prior to the day. If so, perform battery SOC full charge calibration; otherwise, do not perform battery SOC full charge calibration. The procedure preceding step S1 also includes: S00. During off-peak hours, determine whether the energy storage battery meets the prerequisites for performing battery SOC full charge calibration. If yes, proceed to step S01; otherwise, do not perform battery SOC full charge calibration. S01. Determine whether there is a SOC difference between two single cabinets in the current energy storage battery that is greater than or equal to a first preset threshold. If so, perform battery SOC full charge calibration; otherwise, perform step S1. The first preset number of days is 6-8 days.

2. The method for improving the energy efficiency utilization rate of a fully charged energy storage battery according to claim 1, characterized in that, The specific prerequisites are as follows: Currently, there is a SOC difference between two individual cabinets in the energy storage battery that is greater than the second preset threshold. The second preset threshold is less than the first preset threshold.

3. The method for improving the energy efficiency utilization rate of a fully charged energy storage battery according to claim 1, characterized in that, The aforementioned prerequisites also include: The number of days since the last full charge calibration of the energy storage battery is greater than the second preset number of days.

4. A terminal for improving the energy efficiency utilization rate of a fully charged battery, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it performs the following steps: S1. Determine whether the weather is sunny or cloudy during off-peak hours. If so, proceed to step S2; otherwise, perform battery SOC full charge calibration. S2. Calculate and determine whether the expected photovoltaic power generation on the day is less than the average daily power consumption of the energy storage battery in the first preset number of days prior to the day. If so, perform battery SOC full charge calibration; otherwise, do not perform battery SOC full charge calibration. The procedure preceding step S1 also includes: S00. During off-peak hours, determine whether the energy storage battery meets the prerequisites for performing battery SOC full charge calibration. If yes, proceed to step S01; otherwise, do not perform battery SOC full charge calibration. S01. Determine whether there is a SOC difference between two single cabinets in the current energy storage battery that is greater than or equal to a first preset threshold. If so, perform battery SOC full charge calibration; otherwise, perform step S1. The first preset number of days is 6-8 days.

5. A terminal for improving the energy efficiency utilization rate of a fully charged energy storage battery according to claim 4, characterized in that, The specific prerequisites are as follows: Currently, there is a SOC difference between two individual cabinets in the energy storage battery that is greater than the second preset threshold. The second preset threshold is less than the first preset threshold.

6. A terminal for improving the energy efficiency utilization rate of a fully charged energy storage battery according to claim 4, characterized in that, The aforementioned prerequisites also include: The number of days since the last full charge calibration of the energy storage battery is greater than the second preset number of days.

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