Energy storage battery full charge calibration energy efficiency utilization rate improving method and terminal

Abstract

The application discloses a kind of energy storage battery full charging calibration energy efficiency utilization rate promotion method and terminal, in valley electricity period whether energy storage battery meets the prerequisite condition of battery SOC full charging calibration is judged, if yes, whether the SOC difference between two single cabinets in current energy storage battery exists greater than or equal to first preset threshold value is judged, if yes, battery SOC full charging calibration is executed, otherwise, whether the weather of the day is sunny or cloudy is judged in valley electricity period, if yes, whether the daily photovoltaic expected power generation of the day is less than the average daily power consumption of energy storage battery in first preset number of days before the day is calculated and judged, if yes, battery SOC full charging calibration is executed, otherwise, battery SOC full charging calibration is not executed.The application improves the energy efficiency utilization rate of energy storage battery full charging calibration, while reducing the workload of system and reducing operating loss under the condition of guaranteeing the normal operation of energy storage battery.

Description

[0001] This case is a divisional application based on the invention patent filed on September 2, 2022, with application number CN202211071894.4 and titled "A method and terminal for improving the energy efficiency utilization rate of a full-charge calibration battery". Technical Field

[0002] 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 energy storage batteries during full-charge calibration. Background Technology

[0003] Existing full-charge calibration schemes for energy storage batteries will fully charge them 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, considering the daily photovoltaic power generation, it becomes difficult to determine whether full-charge calibration is necessary on that day, leading to a significant decrease in the energy efficiency of full-charge calibration. Moreover, if full-charge calibration is chosen as the default on the same day to address these uncertainties, it will also increase the system workload and operational losses. Summary of the Invention

[0004] The technical problem to be solved by this invention is: how to improve the energy efficiency utilization rate of the energy storage battery during full charge calibration, while reducing the workload of the system and reducing operating losses while ensuring the normal operation of the energy storage battery.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: A method for improving the energy efficiency utilization rate of a fully charged energy storage battery during calibration includes the following steps: S1. 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 S2; otherwise, do not perform battery SOC full charge calibration. S2. 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, proceed to step S3. The first preset number of days is 6-8 days. S3. Determine whether the weather is sunny or cloudy during off-peak hours. If so, proceed to step S4; otherwise, perform battery SOC full charge calibration. S4. 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 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, and the value range of the second preset threshold is 4%-6%.

[0006] To solve the above-mentioned technical problems, another technical solution adopted by the present invention is as follows: A terminal for improving the energy efficiency utilization rate of a fully charged energy storage 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: S1. 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 S2; otherwise, do not perform battery SOC full charge calibration. S2. 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, proceed to step S3. The first preset number of days is 6-8 days. S3. Determine whether the weather is sunny or cloudy during off-peak hours. If so, proceed to step S4; otherwise, perform battery SOC full charge calibration. S4. 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 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, and the value range of the second preset threshold is 4%-6%.

[0007] 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. At the same time, it reduces the workload of the system and reduces operating losses while ensuring the normal operation of the energy storage battery. Attached Figure Description

[0008] Figure 1 This is a schematic diagram illustrating the steps of a method for improving the energy efficiency utilization rate of a fully charged energy storage battery according to an embodiment of the present invention. Figure 2This is a flowchart illustrating a method for improving the energy efficiency of a fully charged energy storage battery according to an embodiment of the present invention. Figure 3 This is a schematic diagram of the structure of a terminal for improving the energy efficiency utilization rate of a fully charged energy storage battery according to an embodiment of the present invention.

[0009] Label Explanation: 1. A terminal for improving the energy efficiency utilization rate of a fully charged energy storage battery; 2. Processor; 3. Memory. Detailed Implementation

[0010] 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.

[0011] Please refer to Figure 1 and Figure 2 A method for improving the energy efficiency utilization rate of a fully charged energy storage battery during calibration, comprising the following steps: S1. 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 S2; otherwise, do not perform battery SOC full charge calibration. S2. 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, proceed to step S3. The first preset number of days is 6-8 days. S3. Determine whether the weather is sunny or cloudy during off-peak hours. If so, proceed to step S4; otherwise, perform battery SOC full charge calibration. S4. 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 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, and the value range of the second preset threshold is 4%-6%.

[0012] The beneficial effects of this invention are as follows: when determining whether the energy storage battery needs to undergo full charge calibration, the photovoltaic system is judged based on the weather conditions of the day, and the expected power generation of the photovoltaic system is compared 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 system, thereby improving the energy efficiency utilization rate of the full charge calibration of the energy storage battery. At the same time, it reduces the workload of the system and reduces operating losses while ensuring the normal operation of the energy storage battery.

[0013] Furthermore, the aforementioned preconditions 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.

[0014] 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.

[0015] 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 2, a processor 3, and a computer program stored in the memory 2 and executable on the processor 3. When the processor 3 executes the computer program, it performs the following steps: S1. 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 S2; otherwise, do not perform battery SOC full charge calibration. S2. 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, proceed to step S3. The first preset number of days is 6-8 days. S3. Determine whether the weather is sunny or cloudy during off-peak hours. If so, proceed to step S4; otherwise, perform battery SOC full charge calibration. S4. 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 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, and the value range of the second preset threshold is 4%-6%.

[0016] The beneficial effects of this invention are as follows: when determining whether the energy storage battery needs to undergo full charge calibration, the photovoltaic system is judged based on the weather conditions of the day, and the expected power generation of the photovoltaic system is compared 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 system, thereby improving the energy efficiency utilization rate of the full charge calibration of the energy storage battery. At the same time, it reduces the workload of the system and reduces operating losses while ensuring the normal operation of the energy storage battery.

[0017] Furthermore, the aforementioned preconditions 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.

[0018] 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.

[0019] Please refer to Figure 1 and Figure 2 Embodiment 1 of the present invention is as follows: A method for improving the energy efficiency of energy storage batteries during full-charge calibration, such as... Figure 1 and Figure 2 As shown, the steps include: S1. During off-peak hours, determine whether the energy storage battery meets the prerequisites for performing battery SOC full charge calibration. If so, proceed to step S2; otherwise, do not perform battery SOC full charge calibration.

[0020] In this embodiment, there are two preconditions, and either one needs to be met. The two preconditions are as follows: 1. Currently, there is a SOC difference between two individual cabinets in the energy storage battery that is greater than the second preset threshold; 2. The number of days since the last full charge calibration of the battery SOC is greater than the second preset number of days.

[0021] 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.

[0022] S2. 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 S3.

[0023] 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.

[0024] S3. Determine whether the weather is sunny or cloudy during off-peak hours. If so, proceed to step S4; otherwise, perform battery SOC full charge calibration.

[0025] 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.

[0026] S4. 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.

[0027] 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 electricity 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 electricity generated by the photovoltaic system, and the excess electricity 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.

[0028] Please refer to Figure 3 Embodiment two of the present invention is as follows: A terminal 1 for improving the energy efficiency of a fully charged energy storage battery, such as... Figure 3 As shown, it includes a memory 3, a processor 2, and a computer program stored in the memory 3 and capable of running on the processor 2. When the processor 2 executes the computer program, it implements the method for improving the energy efficiency utilization rate of a fully charged energy storage battery according to the above embodiment 1.

[0029] 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 an energy storage battery needs to undergo full charge calibration, the method assesses the photovoltaic capacity based on the weather conditions of the day and compares the expected 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, thereby improving the energy efficiency utilization rate of the energy storage battery full charge calibration. At the same time, it reduces the workload of the system and lowers operating losses while ensuring the normal operation of the energy storage battery.

[0030] 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. 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 S2; otherwise, do not perform battery SOC full charge calibration. S2. 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, proceed to step S3. The first preset number of days is 6-8 days. S3. Determine whether the weather is sunny or cloudy during off-peak hours. If so, proceed to step S4; otherwise, perform battery SOC full charge calibration. S4. 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 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, and the value range of the second preset threshold is 4%-6%.

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 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.

3. A terminal for improving the energy efficiency utilization rate of a fully charged energy storage 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. 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 S2; otherwise, do not perform battery SOC full charge calibration. S2. 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, proceed to step S3. The first preset number of days is 6-8 days. S3. Determine whether the weather is sunny or cloudy during off-peak hours. If so, proceed to step S4; otherwise, perform battery SOC full charge calibration. S4. 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 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, and the value range of the second preset threshold is 4%-6%.

4. The energy storage battery full-charge calibration energy efficiency improvement terminal according to claim 3, 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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