Battery single-core charging method of home storage system and terminal

Abstract

The invention provides a battery single-core charging method of a home storage system and a terminal. The battery single-core charging method comprises the following steps: acquiring battery core data meeting charging conditions in a battery management system; acquiring the voltage of each battery cell meeting the charging condition and the distribution position of the battery cells in the battery pack; obtaining the temperature of the area where the battery cell is located according to the distribution position, and sorting all the areas according to the temperature; and controlling the electricity supplementing unit to sequentially supplement electricity for each battery cell meeting the electricity supplementing condition in each area from low to high according to the temperature sequence. According to the invention, by monitoring the data of the battery cells in the home storage system, the voltage and the distribution position of the battery cells meeting the charging condition are obtained in real time, and the charging unit is used for independently charging the battery cells, so that the situation that a certain battery cell or several battery cells are independently processed by manually opening the box is avoided, and the labor cost is saved; and meanwhile, the voltage of each battery cell in the battery pack is balanced, so that the situation that the voltage difference between the battery cells is gradually increased in the charging cycle process of the household storage battery cells, and then shutdown is caused by the overlarge voltage difference is avoided.

Description

Technical Field

[0001] The present invention relates to the field of energy storage, and in particular to a single-cell battery charging method and a terminal for a home energy storage system. Background Art

[0002] During the use of batteries, the uneven resistance of the cells in the battery pack will cause excessive cell voltage differences. In addition, the home storage system is used in a high temperature environment. The high temperature causes the internal expansion of the battery, causing internal imbalance of the battery, which will also cause the voltage difference of the battery cells to increase. The capacity decay rate of the battery cells is inconsistent, resulting in uneven charging and discharging of the entire battery pack, and some battery output lines are charged mutually, resulting in a voltage difference. Due to the structure or layout of the battery pack, the inconsistent heat dissipation value during the charging and discharging process causes inconsistent temperature differences between battery packs, resulting in reduced capacity consistency and inconsistent voltage. These objective reasons lead to poor consistency of battery cells in the battery pack. Excessive cell voltage differences will affect the service life and safety of the battery, so effective measures need to be taken to avoid excessive cell voltage differences. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a single-cell battery charging method and terminal for a home energy storage system to solve the problem of excessively high voltage difference between cells in the home energy storage system.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: A single-cell battery charging method for a home storage system comprises the following steps: S1. Obtaining data of cells that meet the charging conditions from the battery management system; S2, obtaining the voltage of each battery cell that meets the charging condition and the distribution position of the battery cell in the battery pack; S3, obtaining the temperature of the area where the battery cell is located according to the distribution position, and sorting all areas according to the temperature; S4. Control the charging unit to charge each battery cell in each area that meets the charging condition in order from low to high temperature.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: A single-cell battery charging terminal for a home storage system 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, the following steps are performed: S1. Obtaining data of cells that meet the charging conditions from the battery management system; S2, obtaining the voltage of each battery cell that meets the charging condition and the distribution position of the battery cell in the battery pack; S3, obtaining the temperature of the area where the battery cell is located according to the distribution position, and sorting all areas according to the temperature; S4. Control the charging unit to charge each battery cell in each area that meets the charging condition in order from low to high temperature.

[0006] The beneficial effects of the present invention are as follows: a single-cell battery charging method and terminal for a home storage system are provided, which monitors the battery cell data in the home storage system, instantly obtains the battery cell voltage and distribution position that meet the charging conditions, judges the temperature of the area where the battery cell is located, sorts all the areas that need to be charged according to the temperature, and charges the corresponding areas in order from low to high temperature; specifically, the above-mentioned battery cells are charged separately by a charging unit, avoiding manual unpacking and handling of one or several batteries separately, saving labor costs; and at the same time, balancing the voltage of each battery cell in the battery pack, avoiding the home storage battery cell causing the pressure difference between the battery cells to gradually increase during the charging cycle, and then causing shutdown due to excessive pressure difference. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 This is a flow chart of a single-cell battery charging method for a home storage system in an embodiment of the present invention; Figure 2 A specific flow chart of a single-cell battery charging method for a home storage system according to an embodiment of the present invention; Figure 3 A schematic diagram of a single-cell battery charging terminal of a home storage system in an embodiment of the present invention; Description of labels: 1. A single-cell battery charging terminal for a home storage system; 2. A memory; 3. A processor. DETAILED DESCRIPTION

[0008] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in combination with the implementation modes and the accompanying drawings.

[0009] Please refer to Figure 1 as well as Figure 2 , a single-cell battery charging method for a home storage system, characterized in that it includes the steps of: S1. Obtaining data of cells that meet the charging conditions from the battery management system; S2, obtaining the voltage of each battery cell that meets the charging condition and the distribution position of the battery cell in the battery pack; S3, obtaining the temperature of the area where the battery cell is located according to the distribution position, and sorting all areas according to the temperature; S4. Control the charging unit to charge each battery cell in each area that meets the charging condition in order from low to high temperature.

[0010] It is understandable that in a home energy storage environment, the monitoring and adjustment means of the battery pack during use are far weaker than those of a large-scale solar storage charging and inspection station. The reason is that the main features of the home energy storage system are small size, easy use and simple operation. Under such a characteristic structure, some maintenance means and function adjustment modules will inevitably be abandoned. Therefore, in the existing home energy storage environment, the battery cells in the battery often cause excessive voltage differences between the cells during the cycle charge and discharge process, which affects the service life of the home storage battery. Based on the above situation, the beneficial effect of the present invention is that: by using the battery management system (BMS) to obtain the battery cell data that meets the charging conditions, it is ensured that the charging will only be started when the battery cell voltage is lower than the preset standard, thereby avoiding unnecessary energy consumption and unnecessary battery cell intervention. This method ensures the long-term operation of the battery pack, and simplifies the charging process in actual operation. No manual intervention is required, and the efficiency and reliability of the system can be improved through automated operation, reducing the errors and risks that may be caused by manual operation. At the same time, by optimizing the working mechanism of the battery management system, the intelligence level of the home storage system is enhanced, and more accurate battery maintenance is achieved.

[0011] At the same time, due to the limited cooling capacity of household energy storage, before recharging a single battery cell, it is necessary to determine whether recharging can be performed based on the temperature of the battery cell location, so as to avoid recharging at the battery cell alarm temperature, which will greatly reduce the battery cell life. Specifically, the present invention obtains the temperature of the area where the battery cell is located based on the distribution position, and sorts all areas according to the temperature; and preferentially recharges the battery cells in the area with lower temperature, and then sorts the areas according to the temperature, and recharges the battery cells one by one in each area from low to high. Preferably, the detection step S3 also includes the steps of: Compare the temperature of each area with the preset alarm temperature, filter out areas with temperatures higher than the preset alarm temperature, and sort the remaining areas by temperature.

[0012] In an embodiment of the present invention, step S4 specifically includes the steps of: The charging unit is controlled to close the relay at the corresponding position, so that the cells meeting the charging conditions can be charged in turn.

[0013] From the above description, it can be seen that by controlling the relays at the corresponding positions of the charging unit to close, the battery cells that meet the charging conditions can be charged in sequence, thereby avoiding the imbalance problem caused by simultaneous charging in the battery pack. By charging in steps, it can be ensured that each battery cell is fully replenished, and the current can be effectively controlled to avoid overheating or other unsafe factors caused by parallel charging. This solution optimizes the control process of charging, increases the safety of the system, improves the charging efficiency, and ensures the balanced state of the battery pack after charging, extending the service life of the battery. Specifically, the BMM (battery pack monitoring module) collects the voltage of each battery cell in the battery pack and uploads the data to the BMS. The BMS transmits the battery cell voltage data to the home storage system battery charging controller through CAN communication. The charging controller has a voltage-stabilizing constant-current power conversion module and a charging relay inside, which controls the charging relay to close and charge the battery cell; In an embodiment of the present invention, the step S4 further comprises the steps of: The voltage difference between the battery cells that meet the charging condition is detected, and the battery cells whose voltage difference is lower than a preset threshold are screened out, and the charging unit is controlled to charge the screened battery cells in parallel at the same time.

[0014] From the above description, it can be seen that by detecting the voltage difference between cells and selecting cells with a voltage difference lower than a preset threshold for parallel charging, that is, by charging cells that meet the charging conditions and have a small voltage difference with each other in parallel, not only the charging efficiency is improved, but also the charging time is reduced. Especially when multiple cells in the battery pack need to be charged at the same time, the efficiency and speed of the operation can be significantly improved. This solution optimizes the charging operation and reduces the system operation time through precise voltage monitoring and parallel charging.

[0015] In an embodiment of the present invention, the step S4 further includes a step S5: Detect the voltage of all cells in the battery pack. If the maximum voltage difference between the cells is less than the preset threshold, stop charging.

[0016] From the above description, it can be seen that by detecting the voltage difference of all cells and automatically stopping the charging when the voltage difference is less than the preset threshold, over-charging is avoided. This self-detection and stop mechanism ensures that the battery pack is in a reasonable voltage range after the charging is completed, prevents the risk of overcharging some cells in the battery pack, and increases the safety of the system. At the same time, this method reduces invalid charging operations, improves the energy efficiency of the system, helps to extend the service life of the battery, and reduces maintenance costs.

[0017] In an embodiment of the present invention, step S1 specifically includes the following steps: The battery management system is used to collect the voltage of each battery cell in each battery pack, and the battery cell data that meets the charging conditions is obtained based on the collected voltage.

[0018] From the above description, it can be seen that by using the battery management system to collect the real-time voltage of the battery cell, and screening out the battery cells that need to be recharged based on the voltage data, it is ensured that the recharging operation has higher pertinence and accuracy. This effectively optimizes the recharging decision-making process and avoids unnecessary operations on battery cells that do not need to be recharged, thereby improving the overall efficiency of the system. At the same time, the real-time monitoring of the battery management system can accurately feedback the voltage status of each battery cell, making the recharging process more intelligent and precise, further improving the automation level of the home storage system, reducing the need for manual intervention, and improving the reliability of the system and user experience. Specifically, when the home storage system is in the self-maintenance stage, the single-battery recharging controller of the home storage system will judge the battery cell voltage data of the BMS through CAN communication, and perform logical judgment on all the batteries in the home storage system battery pack before recharging.

[0019] Please refer to Figure 3 A battery single-cell charging terminal for a home storage system 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, the steps in the battery single-cell charging of the home storage system are completed. That is, an execution carrier of a battery single-cell charging method for a home storage system is provided to execute the steps in the above method.

[0020] The present invention provides a single-cell battery charging method and terminal for a home storage system, which are mainly used to solve the problem of excessive voltage difference between cells in a home storage environment, and are specifically described below in conjunction with embodiments.

[0021] Please refer to Figure 1 , Embodiment 1 of the present invention is: A single-cell battery charging method for a home storage system comprises the following steps: S1. Obtaining data of cells that meet the charging conditions from the battery management system; S2, obtaining the voltage of each battery cell that meets the charging condition and the distribution position of the battery cell in the battery pack; S3, obtaining the temperature of the area where the battery cell is located according to the distribution position, and sorting all areas according to the temperature; S4. Control the charging unit to charge each battery cell in each area that meets the charging condition in order from low to high temperature.

[0022] That is, in this embodiment, by using the battery management system (BMS) to obtain the battery cell data that meets the charging conditions, it is ensured that the charging will only be started when the battery cell voltage is lower than the preset standard, thereby avoiding unnecessary energy consumption and unnecessary battery cell intervention. This method ensures the long-term operation of the battery pack and simplifies the charging process in actual operation. Without manual intervention, the efficiency and reliability of the system can be improved through automated operation, reducing the errors and risks that may be caused by manual operation. At the same time, by optimizing the working mechanism of the battery management system, the intelligence level of the home storage system is enhanced, and more accurate battery maintenance is achieved.

[0023] Before recharging a single battery cell, it is also necessary to determine whether recharging can be performed based on the temperature of the battery cell location, to avoid recharging at the battery cell alarm temperature, which will significantly reduce the battery cell life. Specifically, the present invention obtains the temperature of the area where the battery cell is located based on the distribution position, and sorts all areas according to the temperature. The battery cells in the area with lower temperature are recharged first, and then the area is sorted according to the temperature, and the battery cells are recharged one by one in each area from low to high. Preferably, the detection step S3 also includes the steps of: Compare the temperature of each area with the preset alarm temperature, filter out areas with temperatures higher than the preset alarm temperature, and sort the remaining areas by temperature.

[0024] Please refer to Figure 2 , Embodiment 2 of the present invention is: Based on the first embodiment, step S1 specifically includes the following steps: The battery management system is used to collect the voltage of each battery cell in each battery pack, and the battery cell data that meets the charging conditions is obtained based on the collected voltage.

[0025] Step S2 specifically includes: Use the battery management system (BMS) to collect voltage data of each battery cell in the battery pack; Compare the collected cell voltage data with the preset charging threshold, screen out cells whose voltage is lower than the charging threshold, and determine them as cells that meet the charging conditions; Obtain the location and distribution information of the cells that meet the charging conditions in the battery pack in order to perform the charging operation.

[0026] Step S4 specifically includes the following steps: BMM (battery pack monitoring module) collects the voltage of each battery cell in the battery pack and uploads the data to BMS. BMS transmits the battery cell voltage data to the battery cell recharge controller of the home storage system through CAN communication. The recharge controller has a voltage-stabilized constant-current power conversion module and a recharge relay inside, which controls the recharge relay to close and recharge the battery cell. Step S4 is followed by step S5: Detect the voltage of all cells in the battery pack. If the maximum voltage difference between the cells is less than the preset threshold, stop charging.

[0027] If it is detected that the voltage difference of all cells in the battery pack reaches the preset safety voltage difference threshold, the battery management system (BMS) controls the battery pack to enter normal working mode and sends a status signal indicating that the charging is completed to notify the user that the charging process is completed.

[0028] By detecting the voltage difference of all cells and automatically stopping charging when the voltage difference is less than the preset threshold, overcharging is avoided. This self-detection and stop mechanism ensures that the battery pack is in a reasonable voltage range after charging is completed, preventing the risk of overcharging some cells in the battery pack and increasing the safety of the system. At the same time, this method reduces ineffective charging operations, improves the energy efficiency of the system, helps to extend the service life of the battery, and reduces maintenance costs.

[0029] Embodiment 3 of the present invention is: On the basis of the second embodiment, step S4 also includes step S5, which performs real-time monitoring on the battery cells that meet the charging conditions during the charging process, and records the battery cell voltage change trend. When the charging is completed, the battery cell voltage data is uploaded to the battery management system for subsequent analysis and maintenance.

[0030] Please refer to Figure 3 , Embodiment 4 of the present invention is: A battery single-cell charging terminal 1 for a home storage system 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, the steps in the battery single-cell charging of the home storage system are completed.

[0031] In summary, the single-cell battery charging method and terminal for a home storage system provided by the present invention realize accurate battery cell voltage monitoring and intelligent charging operation by utilizing a battery management system (BMS). First, the charging is automatically started when the preset voltage conditions are met, which effectively avoids ineffective intervention in normal batteries, significantly improves the energy utilization efficiency of the system, and reduces unnecessary energy consumption. Secondly, the present invention includes a complete control link from battery cell voltage data collection, threshold judgment, relay control to charging operation through an automated charging process that is executed step by step, thereby ensuring the accuracy of the charging process and the stable operation of the system. This mechanism not only improves the efficiency of the system and reduces the risks and error rates in manual operations, but also ensures the voltage balance of the battery pack after charging, so that the system automatically stops charging when the voltage difference between each battery cell is less than the safety threshold, thereby avoiding safety hazards caused by overcharging of the battery cell.

[0032] In addition, by real-time monitoring of the voltage change trend of the battery cells during the charging process and uploading the data, subsequent maintenance and status evaluation can be facilitated. This can detect potential performance problems or battery cell aging trends in advance, so as to better perform preventive maintenance, extend the service life of the battery pack, and reduce long-term maintenance costs. Overall, the solution has significantly improved automation, intelligence, and safety, providing an innovative solution for the efficient maintenance of home storage system batteries, and helping to achieve longer-term and stable operation of home storage systems.

[0033] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's specification and drawings, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A single-cell battery charging method for a home storage system, characterized in that: Includes steps: S1. Obtaining data of cells that meet the charging conditions from the battery management system; S2, obtaining the voltage of each battery cell that meets the charging condition and the distribution position of the battery cell in the battery pack; S3, obtaining the temperature of the area where the battery cell is located according to the distribution position, and sorting all areas according to the temperature; S4. Control the charging unit to charge each battery cell in each area that meets the charging condition in order from low to high temperature.

2. A single-cell battery charging method for a home storage system according to claim 1, characterized in that: The step S4 further comprises the steps of: The charging unit is controlled to close the relay at the corresponding position, so that the cells meeting the charging conditions can be charged in turn.

3. A single-cell battery charging method for a home storage system according to claim 1, characterized in that: The step S4 further comprises the steps of: The voltage difference between the battery cells that meet the charging condition is detected, and the battery cells whose voltage difference is lower than a preset threshold are screened out, and the charging unit is controlled to charge the screened battery cells in parallel at the same time.

4. A single-cell battery charging method for a home storage system according to claim 1, characterized in that: The step S4 further includes a step S5: Detect the voltage of all cells in the battery pack. If the maximum voltage difference between the cells is less than the preset threshold, stop charging.

5. The method for replenishing a single-cell battery of a home storage system according to claim 1, characterized in that: The step S1 specifically includes the following steps: The battery management system is used to collect the voltage of each battery cell in each battery pack, and the battery cell data that meets the charging conditions is obtained based on the collected voltage.

6. A single-cell battery charging terminal for a home storage system, characterized in that: The invention comprises a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the following steps are performed: S1. Obtaining data of cells that meet the charging conditions from the battery management system; S2, obtaining the voltage of each battery cell that meets the charging condition and the distribution position of the battery cell in the battery pack; S3, obtaining the temperature of the area where the battery cell is located according to the distribution position, and sorting all areas according to the temperature; S4. Control the charging unit to charge each battery cell in each area that meets the charging condition in order from low to high temperature.

7. A single-cell battery charging terminal for a home storage system according to claim 6, characterized in that: The step S4 further comprises the steps of: The charging unit is controlled to close the relay at the corresponding position, so that the cells meeting the charging conditions can be charged in turn.

8. The single-cell battery charging terminal of a home storage system according to claim 6, characterized in that: The step S4 further comprises the steps of: The voltage difference between the battery cells that meet the charging condition is detected, and the battery cells whose voltage difference is lower than a preset threshold are screened out, and the charging unit is controlled to charge the screened battery cells in parallel at the same time.

9. A single-cell battery charging terminal for a home storage system according to claim 6, characterized in that: The step S4 further includes a step S5: Detect the voltage of all cells in the battery pack. If the maximum voltage difference between the cells is less than the preset threshold, stop charging.

10. A single-cell battery charging terminal for a home storage system according to claim 6, characterized in that: The step S1 specifically includes the following steps: The battery management system is used to collect the voltage of each battery cell in each battery pack, and the battery cell data that meets the charging conditions is obtained based on the collected voltage.

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