A portable charging box charging control method and terminal for a home power storage box

Abstract

This invention discloses a portable charging box charging control method and terminal for a home power storage box, comprising: establishing a communication connection between the power box and an IO control board; the IO control board acquiring real-time battery data from a battery data acquisition board (BMM) and calculating the charging demand data of the power box based on the battery data; the IO control board determining whether the power box meets the charging conditions based on the charging demand data; if so, controlling the contacts of the charging box to close and starting charging; otherwise, controlling the contacts of the charging box to open and stopping charging; repeating the above steps and determining in real time whether the IO control board has not received a message from the battery data acquisition board (BMM) for a second consecutive period; if so, returning a communication failure notification and controlling the contacts of the charging box to open and stop charging. This invention can realize data detection and charging logic control simultaneously, avoiding the danger of power box malfunction caused by starting charging when charging conditions are not met.

Description

Technical Field

[0001] This invention relates to the field of energy storage system technology, and in particular to a portable charging box charging control method and terminal for a home energy storage box. Background Technology

[0002] The storage and management characteristics of home power boxes require warehouses and B-end customers to perform regular maintenance and recharging. Based on feedback from existing customers, after-sales departments, and overseas warehouse inventory management, there is an urgent need to develop a portable operating accessory for recharging single power boxes, which is complex to operate and has high equipment requirements.

[0003] However, since a single electrical box in a high-voltage series system's secondary architecture only has a Base Module (BMM), existing AC-DC charging boxes cannot communicate with the BMM and only perform simple charging. The main drawbacks are as follows:

[0004] 1. No data is available for measurement, such as individual cell voltage, individual cell temperature, etc.

[0005] 2. Lacking full-charge control logic, it repeatedly replenishes the charge to a specific voltage based on the voltage, which is quite dangerous;

[0006] 3. It lacks fault diagnosis function and cannot shut down the power to handle faults. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to provide a portable charging box charging control method and terminal for home power storage boxes, which realizes data detection and charging logic control.

[0008] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0009] A charging control method for a portable charging box of a home power storage box includes the following steps:

[0010] S1. Establish a communication connection between the electrical box and the IO control board;

[0011] S2. The IO control board acquires the battery data of the battery box collected in real time by the battery acquisition board (BMM), and calculates the charging demand data of the battery box in real time based on the battery data.

[0012] S3. The IO control board determines whether the charging box meets the charging conditions based on the charging demand data. If it does, it controls the contacts of the charging box to close and starts charging; otherwise, it controls the contacts of the charging box to open and stops charging.

[0013] S4. Repeat steps S2-S3 and determine in real time whether the IO control board has not received the message from the battery acquisition board (BMM) for a second consecutive time. If so, return a communication failure notification and control the contacts of the charging box to disconnect and stop charging.

[0014] To solve the above-mentioned technical problems, another technical solution adopted by the present invention is as follows:

[0015] A portable charging box charging control terminal for a home power storage box 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:

[0016] S1. Establish a communication connection between the electrical box and the IO control board;

[0017] S2. The IO control board acquires the battery data of the battery box collected in real time by the battery acquisition board (BMM), and calculates the charging demand data of the battery box in real time based on the battery data.

[0018] S3. The IO control board determines whether the charging box meets the charging conditions based on the charging demand data. If it does, it controls the contacts of the charging box to close and starts charging; otherwise, it controls the contacts of the charging box to open and stops charging.

[0019] S4. Repeat steps S2-S3 and determine in real time whether the IO control board has not received the message from the battery acquisition board (BMM) for a second consecutive time. If so, return a communication failure notification and control the contacts of the charging box to disconnect and stop charging.

[0020] The beneficial effects of this invention are as follows: This invention provides a portable charging box charging control method and terminal for a home power storage box. By establishing a communication connection between the IO control board and the power box, the IO control board can receive real-time battery data collected by the battery data acquisition board (BMM) installed inside the power box. Based on the battery data, the charging needs of the power box are calculated, and the charging of the charging box is controlled according to the charging needs, realizing charging logic control. At the same time, it can also determine whether the power box meets the charging conditions based on the charging needs to further control the charging of the charging box, avoiding the danger of starting the charging of the charging box when the charging conditions are not met, which could cause the power box to malfunction. In addition, it adds a judgment on whether the communication between the BMM and the IO control board is interrupted during the charging logic control and fault diagnosis process, further ensuring the comprehensiveness of fault diagnosis. Attached Figure Description

[0021] Figure 1 This is an overall flowchart of a portable charging box charging control method for a home power storage box according to an embodiment of the present invention.

[0022] Figure 2 This is a system principle block diagram of a home power storage box according to an embodiment of the present invention;

[0023] Figure 3 This is a flowchart illustrating a portable charging box charging control method for a home power storage box according to an embodiment of the present invention.

[0024] Figure 4 A logic flowchart for establishing the power-on and protection of the IO control board and battery cell in an embodiment of the present invention is provided.

[0025] Figure 5 This is a schematic diagram of the structure of a portable charging box charging control terminal for a home power storage box according to an embodiment of the present invention.

[0026] Label Explanation:

[0027] 1. A portable charging box charging control terminal for a home power storage box; 2. A memory; 3. A processor. Detailed Implementation

[0028] 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.

[0029] Prior to this, the following explanations are provided for the English abbreviations appearing in this application:

[0030] 1. BMM: Battery Measure Management, battery data acquisition board;

[0031] 2. SOC: State of Charge;

[0032] 3. SOP table: State of Power, cell charging and discharging power status table;

[0033] 4. OCV meter: Standard table for testing open circuit voltage of battery cells.

[0034] Please refer to Figures 1 to 4 A method for controlling the charging of a portable charging box for a home power storage box, comprising the following steps:

[0035] S1. Establish a communication connection between the electrical box and the IO control board;

[0036] S2. The IO control board acquires the battery data of the battery box collected in real time by the battery acquisition board (BMM), and calculates the charging demand data of the battery box in real time based on the battery data.

[0037] S3. The IO control board determines whether the charging box meets the charging conditions based on the charging demand data. If it does, it controls the contacts of the charging box to close and starts charging; otherwise, it controls the contacts of the charging box to open and stops charging.

[0038] S4. Repeat steps S2-S3 and determine in real time whether the IO control board has not received the message from the battery acquisition board (BMM) for a second consecutive time. If so, return a communication failure notification and control the contacts of the charging box to disconnect and stop charging.

[0039] As described above, the beneficial effects of this invention are as follows: By establishing a communication connection between the IO control board and the battery box, the IO control board can receive real-time battery data collected by the battery data acquisition board (BMM) located inside the battery box. Based on this data, it calculates the charging requirements of the battery box and controls the charging of the charging box according to these requirements, thus achieving charging logic control. Simultaneously, it can determine whether the battery box meets the charging conditions based on the charging requirements to further control the charging of the charging box, avoiding the danger of starting charging when the charging conditions are not met and causing battery box malfunction. Furthermore, it adds a judgment on whether the communication between the BMM and the IO control board is interrupted during the charging logic control and fault diagnosis process, further ensuring comprehensive fault diagnosis.

[0040] Further, step S2 specifically includes:

[0041] S21. The IO control board receives in real time the individual cell voltage, individual cell current and individual cell temperature of each cell in the battery box, which are collected and sent in real time by the battery acquisition board (BMM).

[0042] S22. The IO control board calculates the individual cell charging request voltage for each cell in real time based on the individual cell voltage, the individual cell current and the individual cell temperature.

[0043] S23. The IO control board calculates the SOC of each cell in real time based on the cell voltage and cell temperature, combined with the cell OCV meter.

[0044] S24. The IO control board calculates the individual charging request current of each cell in real time based on the individual cell SOC and the SOP table of the battery box.

[0045] As described above, the IO control board can calculate the charging voltage and charging current requirements of each cell in real time based on the individual cell voltage, current and temperature received in the battery box, combined with the cell OCV meter and the battery box SOP meter, so as to use for subsequent charging condition judgment and charging logic control.

[0046] Further, step S3 specifically includes:

[0047] S31. The IO control board determines whether the individual charging request voltage of each cell is within a preset voltage threshold range and whether the individual cell temperature is within a preset temperature range. If so, proceed to step S32; otherwise, return a notification that the charging conditions are not met and control the contacts of the charging box to disconnect and stop charging. The preset voltage threshold range is [first voltage value, second voltage value], and the preset temperature range is [first temperature value, second temperature value].

[0048] S32. The IO control board returns a notification that the charging conditions are met and controls the contacts of the charging box to close, thus starting charging.

[0049] As described above, before starting the charging box to charge the battery box, it is necessary to ensure the safety of starting the charging process by considering the relationship between the charging voltage required by each battery cell and the preset safe voltage range, as well as the relationship between the temperature of each battery cell and the preset safe temperature range. This is to avoid situations where starting the charging box when there are abnormalities in the battery cells inside the battery box could cause battery box failure or even danger.

[0050] Furthermore, step S32 is followed by the following step:

[0051] S33. The IO control board determines in real time whether the single-cell charging request voltage calculated in real time during the charging process is greater than the second voltage value and continues for a first time. If so, it returns a notification that the charging box is fully charged and controls the contacts of the charging box to disconnect and stop charging. Otherwise, it proceeds to step S34.

[0052] S34. The IO control board determines in real time whether the charging request voltage of the single unit calculated in real time during the charging process is less than the first voltage value and continues for the first time. If so, it returns a single unit undervoltage fault notification and controls the contacts of the charging box to disconnect and stop charging. Otherwise, it proceeds to step S35.

[0053] S35. The IO control board determines in real time whether the temperature of the individual cell received during the charging process is greater than the third temperature and remains so for the first time. If so, it returns an over-temperature fault notification for the individual cell and controls the contacts of the charging box to disconnect and stop charging. Otherwise, it returns to step S33.

[0054] As described above, during the charging process, the IO control board also needs to calculate the charging voltage and current requirements of each cell in real time based on the received battery data. This ensures that the charging box stops charging in time when the cell is fully charged, under-voltage, or over-temperature occurs. This effectively prevents overcharging and avoids the danger caused by repeated charging when the cell is fully charged. Furthermore, it provides timely feedback on fault conditions and stops charging to achieve fault diagnosis.

[0055] Furthermore, the communication connection includes at least one of CAN bus connection, RS485 serial port connection, RS232 serial port connection, Bluetooth connection and WIFI connection.

[0056] As described above, multiple communication methods are used to achieve efficient data transmission between the IO control board and the electrical box.

[0057] Please refer to Figure 5A portable charging box charging control terminal for a home power storage box 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:

[0058] S1. Establish a communication connection between the electrical box and the IO control board;

[0059] S2. The IO control board acquires the battery data of the battery box collected in real time by the battery acquisition board (BMM), and calculates the charging demand data of the battery box in real time based on the battery data.

[0060] S3. The IO control board determines whether the charging box meets the charging conditions based on the charging demand data. If it does, it controls the contacts of the charging box to close and starts charging; otherwise, it controls the contacts of the charging box to open and stops charging.

[0061] S4. Repeat steps S2-S3 and determine in real time whether the IO control board has not received the message from the battery acquisition board (BMM) for a second consecutive time. If so, return a communication failure notification and control the contacts of the charging box to disconnect and stop charging.

[0062] As described above, the beneficial effects of this invention are as follows: Based on the same technical concept, and in conjunction with the aforementioned portable charging control method for a home power storage box, a portable charging control terminal for a home power storage box is provided. By establishing a communication connection between the IO control board and the power box, the IO control board can receive real-time battery data collected by the battery data acquisition board (BMM) located inside the power box. Based on this battery data, the charging needs of the power box are calculated, and the charging of the charging box is controlled according to these needs, achieving charging logic control. Simultaneously, the charging logic control can be further improved by determining whether the power box meets the charging conditions, effectively achieving fault diagnosis and preventing the danger of power box malfunction caused by starting charging when charging conditions are not met. Furthermore, the invention adds a judgment on whether the communication between the BMM and the IO control board is interrupted during the charging logic control and fault diagnosis process, further ensuring comprehensive fault diagnosis.

[0063] Further, step S2 specifically includes:

[0064] S21. The IO control board receives in real time the individual cell voltage, individual cell current and individual cell temperature of each cell in the battery box, which are collected and sent in real time by the battery acquisition board (BMM).

[0065] S22. The IO control board calculates the individual cell charging request voltage for each cell in real time based on the individual cell voltage, the individual cell current and the individual cell temperature.

[0066] S23. The IO control board calculates the SOC of each cell in real time based on the cell voltage and cell temperature, combined with the cell OCV meter.

[0067] S24. The IO control board calculates the individual charging request current of each cell in real time based on the individual cell SOC and the SOP table of the battery box.

[0068] As described above, the IO control board can calculate the charging voltage and charging current requirements of each cell in real time based on the individual cell voltage, current and temperature received in the battery box, combined with the cell OCV meter and the battery box SOP meter, so as to use for subsequent charging condition judgment and charging logic control.

[0069] Further, step S3 specifically includes:

[0070] S31. The IO control board determines whether the individual charging request voltage of each cell is within a preset voltage threshold range and whether the individual cell temperature is within a preset temperature range. If so, proceed to step S32; otherwise, return a notification that the charging conditions are not met and control the contacts of the charging box to disconnect and stop charging. The preset voltage threshold range is [first voltage value, second voltage value], and the preset temperature range is [first temperature value, second temperature value].

[0071] S32. The IO control board returns a notification that the charging conditions are met and controls the contacts of the charging box to close, thus starting charging.

[0072] As described above, before starting the charging box to charge the battery box, it is necessary to ensure the safety of starting the charging process by considering the relationship between the charging voltage required by each battery cell and the preset safe voltage range, as well as the relationship between the temperature of each battery cell and the preset safe temperature range. This is to avoid situations where starting the charging box when there are abnormalities in the battery cells inside the battery box could cause battery box failure or even danger.

[0073] Furthermore, step S32 is followed by the following step:

[0074] S33. The IO control board determines in real time whether the single-cell charging request voltage calculated in real time during the charging process is greater than the second voltage value and continues for a first time. If so, it returns a notification that the charging box is fully charged and controls the contacts of the charging box to disconnect and stop charging. Otherwise, it proceeds to step S34.

[0075] S34. The IO control board determines in real time whether the charging request voltage of the single unit calculated in real time during the charging process is less than the first voltage value and continues for the first time. If so, it returns a single unit undervoltage fault notification and controls the contacts of the charging box to disconnect and stop charging. Otherwise, it proceeds to step S35.

[0076] S35. The IO control board determines in real time whether the temperature of the individual cell received during the charging process is greater than the third temperature and remains so for the first time. If so, it returns an over-temperature fault notification for the individual cell and controls the contacts of the charging box to disconnect and stop charging. Otherwise, it returns to step S33.

[0077] As described above, during the charging process, the IO control board also needs to calculate the charging voltage and current requirements of each cell in real time based on the received battery data. This ensures that the charging box stops charging in time when the battery is fully charged, the cell is under-voltage, or the cell is overheated. This effectively prevents overcharging and avoids the danger caused by repeated charging when the battery is fully charged. Furthermore, it provides timely feedback on fault conditions and stops charging.

[0078] Furthermore, the communication connection includes at least one of CAN bus connection, RS485 serial port connection, RS232 serial port connection, Bluetooth connection and WIFI connection.

[0079] As described above, multiple communication methods are used to achieve efficient data transmission between the IO control board and the electrical box.

[0080] This invention provides a portable charging box charging control method and terminal for home power storage boxes, applicable to safe charging control scenarios for home power storage boxes. The following detailed description is based on specific embodiments.

[0081] Please refer to Figure 1 and Figure 2 Embodiment 1 of the present invention is as follows:

[0082] Among them, such as Figure 2 The diagram shown is a schematic block diagram of the system used in the portable charging box charging control method of a home power storage box in this embodiment. In this embodiment, the charging box uses an AC-DC charging module, which is connected to the AC power grid via a plug, converting AC power to DC power and outputting it to the power box for DC charging. The charging start and stop can be controlled by an I / O control board. In this embodiment, to address the lack of data detection, full-charge control logic, and fault diagnosis functions in existing AC-DC charging modules, a communication connection is established between the I / O control board and the power box. The operating current of the I / O control board can be directly provided by the power box. Specific steps are as follows... Figure 2 As shown, the steps include:

[0083] S1. Establish a communication connection between the electrical box and the IO control board, wherein the communication connection includes at least one of the following: CAN bus connection, RS485 serial port connection, RS232 serial port connection, Bluetooth connection, and WIFI connection.

[0084] S2. The IO control board acquires the battery data of the battery box collected in real time by the battery acquisition board (BMM), and calculates the charging demand data of the battery box in real time based on the battery data.

[0085] S3, the IO control board determines whether the charging box meets the charging conditions based on the charging demand data. If it does, it controls the contacts of the charging box to close and start charging; otherwise, it controls the contacts of the charging box to open and stop charging.

[0086] S4. Repeat steps S2-S3 and check in real time whether the IO control board has not received the message from the battery acquisition board (BMM) for a second time. If so, return a communication failure notification and control the charging box contacts to disconnect and stop charging.

[0087] In this embodiment, a communication connection is established between the IO control board and the battery box. The IO control board receives real-time battery data collected by the battery data acquisition board (BMM) located inside the battery box. Based on this data, it calculates the charging needs of the battery box and controls the charging of the charging box accordingly, thus implementing charging logic control. Simultaneously, it determines whether the battery box meets the charging conditions based on the charging needs and further controls the charging of the charging box, preventing the charging box from malfunctioning due to unmet charging conditions. Multiple communication methods are employed to achieve efficient data transmission between the IO control board and the battery box. Furthermore, a check for communication interruptions between the BMM and the IO control board is added during charging logic control and fault diagnosis to further ensure comprehensive fault diagnosis.

[0088] Please refer to Figure 3 and Figure 4 Embodiment two of the present invention is as follows:

[0089] A portable charging box charging control method for a home power storage box, based on the above embodiment one, in this embodiment, as follows: Figure 3 As shown, step S2 specifically involves:

[0090] S21, the IO control board receives in real time the individual cell voltage, individual cell current and individual cell temperature of each cell in the battery box from the battery acquisition board (BMM).

[0091] The S22 and IO control boards calculate the individual cell charging request voltage in real time based on the individual cell voltage, individual cell current, and individual cell temperature.

[0092] The S23 and IO control boards calculate the SOC of each cell in real time based on the cell voltage and temperature, combined with the cell OCV meter.

[0093] S24, the IO control board calculates the individual cell charging request current in real time based on the individual cell SOC and the SOP table of the power box.

[0094] In this embodiment, the IO control board can calculate the charging voltage and charging current requirements of each cell in real time based on the individual cell voltage, current and temperature received in the battery box, combined with the cell OCV meter and the battery box SOP meter, so as to use for subsequent charging condition judgment and charging logic control.

[0095] Then step S3 is as follows:

[0096] S31. The IO control board determines whether the individual charging request voltage of each cell is within the preset voltage threshold range and whether the individual cell temperature is within the preset temperature range. If so, proceed to step S32. Otherwise, return a notification that the charging conditions are not met and control the contacts of the charging box to disconnect and stop charging. The preset voltage threshold range is [first voltage value, second voltage value], and the preset temperature range is [first temperature value, second temperature value].

[0097] S32, the IO control board returns a notification that the charging conditions are met and controls the contacts of the charging box to close, starting charging.

[0098] Before starting the charging box to charge the battery box, it is necessary to ensure the safety of starting the charging process by considering the relationship between the charging voltage required by each battery cell and the preset safe voltage range, as well as the relationship between the temperature of each battery cell and the preset safe temperature range. This is to avoid situations where starting the charging box when there are abnormalities in the battery cells inside the battery box could cause battery box failure or even danger.

[0099] After charging begins, fault diagnosis is still required, meaning that after step S32, the following steps are also included:

[0100] S33. The IO control board determines in real time whether the single-cell charging request voltage calculated in real time during the charging process is greater than the second voltage value and remains so for the first time. If so, it returns a notification that the charging box is fully charged and controls the contacts of the charging box to disconnect and stop charging. Otherwise, it proceeds to step S34.

[0101] S34. The IO control board determines in real time whether the single-cell charging request voltage calculated in real time during the charging process is less than the first voltage value and remains so for a period of time. If so, it returns a single-cell undervoltage fault notification and controls the contacts of the charging box to disconnect and stop charging. Otherwise, it proceeds to step S35.

[0102] S35. The IO control board determines in real time whether the temperature of the individual cell received during the charging process is greater than the third temperature and remains so for the first time. If so, it returns an over-temperature fault notification for the individual cell and controls the contacts of the charging box to disconnect and stop charging. Otherwise, it returns to step S33.

[0103] During the charging process, the IO control board also needs to calculate the charging voltage and current requirements of each cell in real time based on the received battery data. This ensures that the charging box stops charging in time when the cell is fully charged, under-voltage, or over-temperature occurs. This effectively prevents overcharging and avoids the dangers caused by repeated charging when the cell is fully charged. Furthermore, it provides timely feedback on fault conditions and stops charging, effectively achieving fault diagnosis.

[0104] like Figure 4 As shown, in this embodiment, the IO control board and the electrical box establish communication and protection logic using a CAN connection. The specific CAN ID has no special requirements. Figure 4 The value in 0x1080F5 represents the specific ID value used in this embodiment. Other values ​​can be used instead in other equivalent embodiments. In this embodiment, F5 in 0x1080F5 represents the IO control board, 80 represents the BMM ID, and 10 represents the 10th ID. Figure 4 P2 in the diagram represents the contact point of the charging case.

[0105] In this embodiment, the charging conditions can be set as follows:

[0106] Permissible charging conditions: Full charge indicator not set.

[0107] No fault

[0108] The range of unit voltage U: 2.0V ≤ U ≤ 3.60V

[0109] Starting temperature range T: 0℃≤T≤35℃

[0110] Charging stops when: 1. Fully charged

[0111] 2. Individual unit voltage U: U < 2.0V or U > 3.60V

[0112] 3.60V3. Temperature T: T>55℃

[0113] 4. Equipment malfunction

[0114] Charging power: P = 1500W

[0115] In this embodiment, the first voltage value is 2.0V, the second voltage value is 3.60V, the first temperature value is 0℃, the second temperature value is 35℃, and the third temperature value is 55℃.

[0116] in, Figure 4 The control logic can be transformed into the form shown in Table 1 below, that is, the internal state, state operation, condition judgment and processing method of the IO control board are provided as shown in Table 1:

[0117] Table 1:

[0118]

[0119] Please refer to Figure 3 Embodiment 3 of the present invention is as follows:

[0120] A portable charging box charging control terminal 1 for a home power storage box includes a memory 2, a processor 3, and a computer program stored on the memory 2 and executable on the processor 3. When the processor 3 executes the computer program, it implements the steps in Embodiment 1 or Embodiment 2 described above.

[0121] In summary, the portable charging box charging control method and terminal for a home power storage box provided by the present invention have the following beneficial effects:

[0122] 1. Increased the system safety of the home power storage box, preventing overcharging and avoiding repeated charging when fully charged, which could cause danger;

[0123] 2. Fault diagnosis has been added, and charging will be stopped in case of abnormality.

[0124] 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 charging control method for a portable charging box of a home power storage box, characterized in that, Including the following steps: S1. Establish a communication connection between the electrical box and the IO control board; S2. The IO control board acquires the battery data of the battery box collected in real time by the battery acquisition board (BMM), and calculates the charging demand data of the battery box in real time based on the battery data. S3. The IO control board determines whether the charging box meets the charging conditions based on the charging demand data. If it does, it controls the contacts of the charging box to close and starts charging; otherwise, it controls the contacts of the charging box to open and stops charging. S4. Repeat steps S2-S3 and determine in real time whether the IO control board has not received the message from the battery acquisition board (BMM) for a second time. If so, return a communication failure notification and control the contacts of the charging box to disconnect and stop charging. Step S3 specifically involves: S31. The IO control board determines whether the individual charging request voltage of each cell is within a preset voltage threshold range and whether the individual cell temperature is within a preset temperature range. If so, proceed to step S32; otherwise, return a notification that the charging conditions are not met and control the contacts of the charging box to disconnect and stop charging. The preset voltage threshold range is [first voltage value, second voltage value], and the preset temperature range is [first temperature value, second temperature value]. S32, The IO control board returns a notification that the charging conditions are met and controls the contacts of the charging box to close, and charging begins; The step S32 is followed by the following step: S33. The IO control board determines in real time whether the single-cell charging request voltage calculated in real time during the charging process is greater than the second voltage value and continues for a first time. If so, it returns a notification that the charging box is fully charged and controls the contacts of the charging box to disconnect and stop charging. Otherwise, it proceeds to step S34. S34. The IO control board determines in real time whether the charging request voltage of the single unit calculated in real time during the charging process is less than the first voltage value and continues for the first time. If so, it returns a single unit undervoltage fault notification and controls the contacts of the charging box to disconnect and stop charging. Otherwise, it proceeds to step S35. S35. The IO control board determines in real time whether the temperature of the individual cell received during the charging process is greater than the third temperature and remains so for the first time. If so, it returns an over-temperature fault notification for the individual cell and controls the contacts of the charging box to disconnect and stop charging. Otherwise, it returns to step S33.

2. The charging control method for a portable charging box of a home power storage box according to claim 1, characterized in that, Step S2 specifically involves: S21. The IO control board receives in real time the individual cell voltage, individual cell current and individual cell temperature of each cell in the battery box, which are collected and sent in real time by the battery acquisition board (BMM). S22. The IO control board calculates the individual cell charging request voltage for each cell in real time based on the individual cell voltage, the individual cell current and the individual cell temperature. S23. The IO control board calculates the SOC of each cell in real time based on the cell voltage and cell temperature, combined with the cell OCV meter. S24. The IO control board calculates the individual charging request current of each cell in real time based on the individual cell SOC and the SOP table of the battery box.

3. The portable charging box charging control method for a home power storage box according to claim 1, characterized in that, The communication connection includes at least one of the following: CAN bus connection, RS485 serial port connection, RS232 serial port connection, Bluetooth connection, and WIFI connection.

4. A portable charging box and charging control terminal for a home power storage box, characterized in that, Includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the computer program, performs the following steps: S1. Establish a communication connection between the electrical box and the IO control board; S2. The IO control board acquires the battery data of the battery box collected in real time by the battery acquisition board (BMM), and calculates the charging demand data of the battery box in real time based on the battery data. S3. The IO control board determines whether the charging box meets the charging conditions based on the charging demand data. If it does, it controls the contacts of the charging box to close and starts charging; otherwise, it controls the contacts of the charging box to open and stops charging. S4. Repeat steps S2-S3 and determine in real time whether the IO control board has not received the message from the battery acquisition board (BMM) for a second time. If so, return a communication failure notification and control the contacts of the charging box to disconnect and stop charging. Step S3 specifically involves: S31. The IO control board determines whether the individual charging request voltage of each cell is within a preset voltage threshold range and whether the individual cell temperature is within a preset temperature range. If so, proceed to step S32; otherwise, return a notification that the charging conditions are not met and control the contacts of the charging box to disconnect and stop charging. The preset voltage threshold range is [first voltage value, second voltage value], and the preset temperature range is [first temperature value, second temperature value]. S32, The IO control board returns a notification that the charging conditions are met and controls the contacts of the charging box to close, and charging begins; The step S32 is followed by the following step: S33. The IO control board determines in real time whether the single-cell charging request voltage calculated in real time during the charging process is greater than the second voltage value and continues for a first time. If so, it returns a notification that the charging box is fully charged and controls the contacts of the charging box to disconnect and stop charging. Otherwise, it proceeds to step S34. S34. The IO control board determines in real time whether the charging request voltage of the single unit calculated in real time during the charging process is less than the first voltage value and continues for the first time. If so, it returns a single unit undervoltage fault notification and controls the contacts of the charging box to disconnect and stop charging. Otherwise, it proceeds to step S35. S35. The IO control board determines in real time whether the temperature of the individual cell received during the charging process is greater than the third temperature and remains so for the first time. If so, it returns an over-temperature fault notification for the individual cell and controls the contacts of the charging box to disconnect and stop charging. Otherwise, it returns to step S33.

5. The portable charging box charging control terminal for a home power storage box according to claim 4, characterized in that, Step S2 specifically involves: S21. The IO control board receives in real time the individual cell voltage, individual cell current and individual cell temperature of each cell in the battery box, which are collected and sent in real time by the battery acquisition board (BMM). S22. The IO control board calculates the individual cell charging request voltage for each cell in real time based on the individual cell voltage, the individual cell current and the individual cell temperature. S23. The IO control board calculates the SOC of each cell in real time based on the cell voltage and cell temperature, combined with the cell OCV meter. S24. The IO control board calculates the individual charging request current of each cell in real time based on the individual cell SOC and the SOP table of the battery box.

6. The portable charging box charging control terminal for a home power storage box according to claim 4, characterized in that, The communication connection includes at least one of the following: CAN bus connection, RS485 serial port connection, RS232 serial port connection, Bluetooth connection, and WIFI connection.

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