Charging Control Method, Device, System, and Readable Storage Medium

Abstract

The present application discloses a charging control method, device, system and readable storage medium. The charging control method according to the embodiments of the present application includes: obtaining the current standard charging current value of the battery pack and the initial setting value of the charging current of the photovoltaic module; obtaining the actual charging current value of the photovoltaic module; when the difference between the actual charging current value and the initial setting value is less than or equal to a predetermined value, updating the initial setting value to a first updated setting value, where the first updated setting value is equal to the initial setting value plus a step-up current value; when the difference between the actual charging current value and the initial setting value is greater than the predetermined value, updating the initial setting value to a second updated setting value, where the second updated setting value is equal to the actual charging current value plus a step-up current value. The charging control method, device and system proposed by the present application will not cause large current surges, avoid damage to the battery, and are conducive to ensuring the service life of the battery pack.

Description

Technical Field

[0001] The present application relates to the technical field of energy storage power supply, and more specifically, to a charging control method, device, system and readable storage medium. Background Art

[0002] With the development of new energy technology, it is now very common for battery packs to use a hybrid charging method that uses both photovoltaic and mains charging. In order to improve the utilization rate of new energy, photovoltaic charging is generally preferred, and the mains supplements the charging current of the battery pack. However, the charging current of photovoltaic charging is easily affected by light intensity. When the light intensity suddenly changes from weak to strong, the charging current of photovoltaic charging will rise rapidly, and the charging current of the mains often cannot be adjusted in time, which will cause the charging current of the battery pack to be much greater than the requested current, or even greater than the maximum charging current allowed by the battery pack, causing overcharging, causing current shock to the battery pack, damaging the battery pack, and shortening the service life of the battery pack. Summary of the invention

[0003] The embodiments of the present application provide a charging control method, device, system and readable storage medium to solve at least one of the above-mentioned technical problems.

[0004] The charging control method of the embodiment of the present application is used to control a charging loop, wherein the charging loop includes a battery pack and a photovoltaic assembly and an inverter for charging the battery pack. The charging control method includes:

[0005] Obtaining a current standard charging current value of the battery pack and an initial setting value of the charging current of the photovoltaic module;

[0006] Obtaining an actual charging current value of the photovoltaic module;

[0007] When the difference between the actual charging current value and the initial setting value is less than a predetermined value, updating the initial setting value to a first updated setting value, wherein the first updated setting value is equal to the initial setting value plus a step-increase current value;

[0008] When the difference between the actual charging current value and the initial setting value is greater than or equal to the predetermined value, the initial setting value is updated to a second updated setting value, which is equal to the actual charging current value plus one of the step-increase current values.

[0009] The charging control method proposed in this application makes the updated set value approach the actual charging current value when the actual charging current value decreases, and makes the updated set value increase gradually when the actual charging current value increases. Thus, even if the light suddenly becomes stronger, the actual charging current value will increase steadily and will not change significantly, thereby avoiding overcharging of the battery. At the same time, there will be no large current impact, avoiding damage to the battery and being beneficial to ensuring the service life of the battery pack.

[0010] In some embodiments, the obtaining of the current standard charging current value of the battery pack and the initial set value of the charging current of the photovoltaic module includes:

[0011] Determining the standard charging current value according to the charging curve, the current temperature value and the voltage value of the battery pack.

[0012] In this way, obtaining the standard charging current value by using the charging curve, the current temperature value and the voltage value is beneficial to ensuring the charging efficiency and product performance.

[0013] In some embodiments, the predetermined value is 0.2A.

[0014] In this way, a current difference within 0.2A will not have a significant impact on the performance of the system, which is beneficial to simplifying the design.

[0015] In some embodiments, the step-up current value is less than or equal to the maximum mutation value of the charging current that the battery pack can withstand.

[0016] In this way, the actual photovoltaic charging current can increase steadily without affecting the performance of the battery pack, which is beneficial to ensuring the service life of the battery pack.

[0017] In some embodiments, the control method further includes:

[0018] When the first updated set value is greater than the standard charging current value, updating the first updated set value to a third updated set value, where the third updated set value is equal to the standard charging current value; and

[0019] When the second updated set value is greater than the standard charging current value, updating the second updated set value to a fourth updated set value, where the fourth updated set value is equal to the standard charging current value.

[0020] In this way, it is possible to avoid setting the charging current too large, causing overcharging due to the total charging current being greater than the standard charging current value.

[0021] In some embodiments, the control method further includes:

[0022] Calculate the set value of the charging current of the inverter, where the set value is the difference between the standard charging current value and the actual charging current value.

[0023] In this way, the inverter can timely supplement the charging current to ensure the charging efficiency of the battery pack.

[0024] In some embodiments, the control method further includes:

[0025] After a preset time from determining the set value, re-obtain the standard charging current value and the initial setting value. The standard charging current value is determined according to the charging curve of the battery pack, the current temperature value, and the voltage value. The initial setting value is the first updated setting value, the second updated setting value, the third updated setting value, or the fourth updated setting value.

[0026] In this way, the initial setting value can be steadily increased, avoiding a sudden increase in the total charging current, which may cause current impact.

[0027] In some embodiments, the preset time is the response time of the charging loop.

[0028] In this way, it can ensure that the system can fully respond and complete the corresponding actions, avoiding the system not having enough time to respond, which may cause excessive current and affect the battery pack.

[0029] The charging control device according to the second embodiment of the present application is used to control a charging loop, where the charging loop includes a battery pack, a photovoltaic module for charging the battery pack, and an inverter. The charging control device includes:

[0030] A first acquisition module for acquiring the current standard charging current value of the battery pack and the initial setting value of the charging current of the photovoltaic module;

[0031] A second acquisition module for acquiring the actual charging current value of the photovoltaic module;

[0032] A first calculation module for updating the initial setting value to a first updated setting value when the difference between the actual charging current value and the initial setting value is less than a predetermined value. The first updated setting value is equal to the initial setting value plus a step-up current value;

[0033] A second calculation module for updating the initial setting value to a second updated setting value when the difference between the actual charging current value and the initial setting value is greater than or equal to the predetermined value. The second updated setting value is equal to the actual charging current value plus a step-up current value.

[0034] The charging control system according to the third embodiment of the present application includes a processor and a memory. The memory stores a computer program. When the computer program is executed by the processor, the processor implements the instructions of the charging control method as described in any one of the above.

[0035] The non - volatile computer - readable storage medium according to the fourth embodiment of the present application. The computer - readable storage medium stores a computer program. When the computer program is executed by a processor, it implements the charging control method as described in any one of the above.

[0036] Additional aspects and advantages of the embodiments of the present application will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the embodiments of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The above - mentioned and / or additional aspects and advantages of the present application will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, where:

[0038] Figure 1 is a schematic flowchart of the charging control method according to the embodiment of the present application;

[0039] Figure 2 is a schematic block diagram of the charging control device according to the embodiment of the present application;

[0040] Figure 3 is a schematic block diagram of the charging control system according to the embodiment of the present application;

[0041] Figure 4 is a schematic block diagram of the module for controlling the charging loop according to the embodiment of the present application;

[0042] Figure 5 is a schematic flowchart of the charging control method in some embodiments of the present application;

[0043] Figure 6 is a schematic flowchart of the charging control method in some embodiments of the present application;

[0044] Figure 7 is a schematic flowchart of the charging control method in some embodiments of the present application;

[0045] Figure 8 is a schematic flowchart of the charging control method in some embodiments of the present application.

[0046] Description of main component symbols: Charging control system 100, charging control device 10, first acquisition module 11, second acquisition module 12, first calculation module 13, second calculation module 14, processor 20, memory 30, charging loop 40, battery pack 41, photovoltaic module 42, inverter 43, main control board 44. Detailed implementation manners

[0047] The following further describes the implementation manners of the present application with reference to the accompanying drawings. The same or similar reference numerals in the drawings represent the same or similar elements or elements with the same or similar functions from beginning to end.

[0048] In addition, the implementation manners of the present application described below with reference to the accompanying drawings are exemplary and are only used to explain the implementation manners of the present application, and should not be construed as a limitation to the present application.

[0049] In the present application, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0050] Please refer to Figure 1 , the charging control method of the implementation manner of the present application is used to control the charging loop 40. The charging loop 40 includes a battery pack 41, a photovoltaic module 42 for charging the battery pack 41, and an inverter 43. The charging control method includes:

[0051] Step 01: Obtain the current standard charging current value of the battery pack and the initial setting value of the charging current of the photovoltaic module;

[0052] Step 02: Obtain the actual charging current value of the photovoltaic module;

[0053] Step 03: When the difference between the actual charging current value and the initial setting value is less than a predetermined value, update the initial setting value to a first updated setting value, and the first updated setting value is equal to the initial setting value plus a step-up current value;

[0054] Step 04: When the difference between the actual charging current value and the initial setting value is greater than or equal to the predetermined value, update the initial setting value to a second updated setting value, and the second updated setting value is equal to the actual charging current value plus a step-up current value.

[0055] Please refer to Figure 2, the charging control device 10 of the second embodiment of the present application is used to control the charging loop 40. The charging loop 40 includes a battery pack 41, a photovoltaic module 42 for charging the battery pack 41, and an inverter 43. The charging control device 10 includes a first acquisition module 11, a second acquisition module 12, a first calculation module 13, and a second calculation module 14. Among them, the first acquisition module 11 is used to acquire the current standard charging current value of the battery pack 41 and the initial setting value of the charging current of the photovoltaic module 42. The second acquisition module 12 is used to acquire the actual charging current value of the photovoltaic module 42. The first calculation module 13 is used to update the initial setting value to a first updated setting value when the difference between the actual charging current value and the initial setting value is less than a predetermined value. The first updated setting value is equal to the initial setting value plus a step-up current value. The second calculation module 14 is used to update the initial setting value to a second updated setting value when the difference between the actual charging current value and the initial setting value is greater than or equal to the predetermined value. The second updated setting value is equal to the actual charging current value plus a step-up current value.

[0056] Please refer to Figure 3 , the charging control system 100 of the third embodiment of the present application includes a processor 20 and a memory 30. The memory 30 stores a computer program. When the computer program is executed by the processor 20, the processor 20 implements the instructions of the charging control method as described in any one of the above. Or rather, the processor 20 can be used to acquire the current standard charging current value of the battery pack 41 and the initial setting value of the charging current of the photovoltaic module 42; acquire the actual charging current value of the photovoltaic module 42; update the initial setting value to a first updated setting value when the difference between the actual charging current value and the initial setting value is less than a predetermined value. The first updated setting value is equal to the initial setting value plus a step-up current value; update the initial setting value to a second updated setting value when the difference between the actual charging current value and the initial setting value is greater than or equal to the predetermined value. The second updated setting value is equal to the actual charging current value plus a step-up current value.

[0057] The charging control method, device, and system proposed by the present application make the updated setting value approach the actual charging current value when the actual charging current value drops, and make the updated setting value gradually increase when the actual charging current value rises. Thus, even if the light suddenly becomes stronger, the actual charging current value will remain stable and increase without large changes, thereby avoiding overcharging of the battery. At the same time, there will be no large current impact, avoiding damage to the battery, which is beneficial to ensuring the service life of the battery pack 41.

[0058] Specifically, please refer to Figure 4 , in the embodiment of the present application, the charging control system 100 includes a main control board 44. The main control board 44 is electrically connected to the photovoltaic module 42 and the inverter 43 and controls the photovoltaic module 42 and the inverter 43 to charge the battery pack 41.

[0059] In the embodiment of the present application, when the photovoltaic module 42 is charging, there is a set value of the charging current, which is used to limit the charging current of the photovoltaic module 42, so that the charging current of the photovoltaic module 42 does not exceed the set value at most during the process of changing with the light intensity.

[0060] In the embodiment of the present application, after obtaining the current standard charging current value Imax, first give the photovoltaic module 42 a step-up current value Istep as the initial set value Ipv_set, that is, Ipv_set = Istep. Determine whether the current actual charging current value Ipv_now of the photovoltaic module 42 is close to the initial set value, that is, whether the difference between the actual charging current value and the initial set value is less than or equal to a predetermined value. If it is close, it means that the current light intensity meets the initial set value, and update the initial set value to the first updated set value. The first updated set value is equal to the initial set value plus a step-up current value, that is, Ipv_set = Ipv_set + Istep.

[0061] On the contrary, if the current actual charging current value of the photovoltaic module 42 cannot be close to the initial set value, that is, when the difference between the actual charging current value and the initial set value is greater than the predetermined value, update the initial set value to the second updated set value. The second updated set value is equal to the actual charging current value plus a step-up current value, that is, add a step-up current value to the actual charging current value of the photovoltaic module 42, that is, Ipv_set = Ipv_now + Istep, as the initial set value of the photovoltaic module 42 this time.

[0062] It is easy to understand that when the actual charging current value of the photovoltaic module 42 cannot approach the set current, it may be that the light intensity is not strong enough, or the light intensity may have attenuated. If it is the latter, at this time, the actual charging current value of the photovoltaic module 42 differs greatly from the initial set value. The inverter 43 will make up for the required charging current of the system. If a relatively large set value is still maintained, once the light suddenly recovers, the actual charging current value of the photovoltaic module 42 will increase rapidly. Before the inverter 43 has time to adjust, when the charging current value of the inverter 43 is superimposed, the charging current of the battery will be much greater than the standard charging current, resulting in a large current impact. Therefore, to avoid this situation, when the current actual charging current value of the photovoltaic module 42 cannot approach the initial set value, the initial set value is updated to the actual charging current value plus a step-up current value as the new set value of the photovoltaic module 42. In this way, even if the light suddenly becomes stronger, the maximum current output by the photovoltaic module 42 will not exceed the new set value. Even when the current of the inverter 43 is superimposed, the total charging current of the battery will not differ from the standard charging current by more than a step-up current value, and a large current impact will not occur. At the same time, it can also ensure that the final charging power of the battery reaches the rated power and there will be no overcharging problem.

[0063] Please refer to Figure 5 , in some embodiments, step 01 includes:

[0064] 011: Determine the standard charging current value according to the charging curve of the battery pack, the current temperature value, and the voltage value.

[0065] In this way, obtaining the standard charging current value using the charging curve, the current temperature value, and the voltage value is beneficial to ensuring the charging efficiency and product performance

[0066] In some embodiments, the sub-step 011 can be implemented by the first acquisition module 11, or rather, the first acquisition module 11 can be used to determine the standard charging current value according to the charging curve of the battery pack 41, the current temperature value, and the voltage value.

[0067] In some embodiments, the processor 20 can be used to determine the standard charging current value according to the charging curve of the battery pack 41, the current temperature value, and the voltage value.

[0068] Specifically, the charging curve of the battery pack 41 describes the variation relationship of parameters such as voltage and current of the battery pack 41 during the charging process with time or charging stage. The life of the battery pack 41 is closely related to its charging and discharging processes. An excessive charging current will accelerate the consumption of chemical substances inside the battery and the wear of the electrode material, thereby shortening the life of the battery pack 41. The standard charging current value determined according to the charging curve can avoid damage to the battery pack 41 caused by excessive current, thereby extending the life of the battery pack 41.

[0069] In some embodiments, the predetermined value is 0.2A.

[0070] In this way, a current difference within 0.2A will not significantly affect the performance of the system, which is beneficial to simplifying the design.

[0071] Specifically, by determining whether the difference between the actual charging current value and the initial set value is less than the predetermined value, it is judged whether the current actual charging current value of the photovoltaic module 42 is close to the initial set value. In the embodiments of the present application, the predetermined value is 0.2A, and a current difference within 0.2A will not significantly affect the performance of the system. Such a setting helps to simplify the design and selection of current sources, loads, and other related components, enabling designers to more flexibly select components that meet the requirements without overly concerning about minor current differences.

[0072] In some embodiments, the step - up current value is less than or equal to the maximum mutation value of the charging current that the battery pack 41 can withstand.

[0073] In this way, the actual photovoltaic charging current can increase steadily without affecting the performance of the battery pack 41, which is beneficial to ensuring the service life of the battery pack 41.

[0074] Specifically, in the embodiments of the present application, the step - up current value needs to consider the difference in the charging current that the battery pack 41 allows to exceed the standard charging current within a short period of time. The step - up current value shall not be greater than this difference, otherwise when the battery voltage reaches the protection voltage, the battery charge will not reach the nominal charge of the product. This difference can be taken as the step - up current. The short period of time refers to the time from the start of charging to the current becoming stable, generally not more than 60 seconds.

[0075] Please refer to Figure 6 , in some embodiments, the control method further includes:

[0076] Step 05: When the first updated set value is greater than the standard charging current value, update the first updated set value to a third updated set value, and the third updated set value is equal to the standard charging current value; and

[0077] When the second updated set value is greater than the standard charging current value, update the second updated set value to a fourth updated set value, and the fourth updated set value is equal to the standard charging current value.

[0078] In this way, it is possible to avoid setting the charging current too large, causing over - charging due to the total charging current being greater than the standard charging current value.

[0079] In some embodiments, step 05 can be implemented by the second calculation module 14, or rather, the second calculation module 14 can be used to update the first update setting value to a third update setting value equal to the standard charging current value when the first update setting value is greater than the standard charging current value; and to update the second update setting value to a fourth update setting value equal to the standard charging current value when the second update setting value is greater than the standard charging current value.

[0080] In some embodiments, the processor 20 can be used to update the first update setting value to a third update setting value equal to the standard charging current value when the first update setting value is greater than the standard charging current value; and to update the second update setting value to a fourth update setting value equal to the standard charging current value when the second update setting value is greater than the standard charging current value.

[0081] Specifically, in the embodiments of the present application, the set value of the charging current of the updated photovoltaic module 42 should not exceed the standard charging current value, that is, when the set value is greater than the standard charging current value, Ipv_set = Imax, and when the set value is less than or equal to the standard charging current value, the set value remains unchanged.

[0082] Please refer to Figure 7 , in some embodiments, the control method further includes:

[0083] Step 06: Calculate the set value of the charging current of the inverter, and the set value is the difference between the standard charging current value and the actual charging current value.

[0084] In this way, the inverter 43 can timely supplement the charging current to ensure the charging efficiency of the battery pack 41.

[0085] In some embodiments, step 06 can be implemented by the second calculation module 14, or rather, the second calculation module 14 can be used to calculate the set value of the charging current of the inverter 43, and the set value is the difference between the standard charging current value and the actual charging current value.

[0086] In some embodiments, the processor 20 can be used to calculate the set value of the charging current of the inverter 43, and the set value is the difference between the standard charging current value and the actual charging current value.

[0087] Specifically, in the embodiments of the present application, the set value of the charging current of the inverter 43 is always equal to the difference between the actual charging current value Ipv_now actually output by the current photovoltaic module 42 and the standard charging current Imax, that is, Iinv_set = Imax - Ipv_now.

[0088] Please refer to Figure 8, in some embodiments, the control method further includes:

[0089] Step 07: After determining the set value preset time, re-obtain the standard charging current value and the initial setting value. The standard charging current value is determined according to the charging curve of the battery pack, the current temperature value, and the voltage value. The initial setting value is the first updated setting value, the second updated setting value, the third updated setting value, or the fourth updated setting value.

[0090] In this way, the initial setting value can be steadily increased, avoiding a sudden increase in the total charging current and resulting in current impact.

[0091] In some embodiments, step 07 can be implemented by the first acquisition module 11, or rather, the first acquisition module 11 can be used to re-obtain the standard charging current value and the initial setting value after determining the set value preset time. The standard charging current value is determined according to the charging curve of the battery pack 41, the current temperature value, and the voltage value. The initial setting value is the first updated setting value, the second updated setting value, the third updated setting value, or the fourth updated setting value.

[0092] In some embodiments, the processor 20 can be used to re-obtain the standard charging current value and the initial setting value after determining the set value preset time. The standard charging current value is determined according to the charging curve of the battery pack 41, the current temperature value, and the voltage value. The initial setting value is the first updated setting value, the second updated setting value, the third updated setting value, or the fourth updated setting value.

[0093] Specifically, in the embodiments of the present application, after determining the set value preset time, the above steps are re-performed and looped until an end instruction is received. The end instruction can be a manually input disconnect instruction or an instruction indicating that the battery pack 41 is fully charged. Among them, the set value of the charging current of the photovoltaic module 42 updated in the previous round is selected as the initial setting value for this round.

[0094] In some embodiments, the preset time is the response time of the charging loop 40.

[0095] In this way, it can be ensured that the system can fully respond and complete the corresponding actions, avoiding excessive current caused by the system's inability to respond in time and affecting the battery pack 41.

[0096] Specifically, in the embodiments of the present application, the response time of the inverter 43 is the maximum time from when the main control board 44 issues a command to change the charging current to the inverter 43 until the inverter 43 adjusts to the target current. The smaller this time is, the faster the current can be switched, and the better the performance. Similarly, the response time of the photovoltaic module 42 is the maximum time from when the main control board 44 issues a command to change the charging current to the photovoltaic module 42 until the photovoltaic module 42 adjusts to the target current. The larger value between the two is taken as the response time of the charging loop 40 of the system. The time period for the main control to issue a current adjustment command needs to be greater than the response time of the system charging loop 40. Currently, the response time of the inverter 43 is generally below 300 ms, while that of the photovoltaic module 42 is relatively large, generally 2 - 3 s. Here, the response time of the charging loop 40 can be selected as 3 s.

[0097] The embodiments of the present application also propose a non - volatile computer - readable storage medium. The computer - readable storage medium stores a computer program, and when the computer program is executed by the processor 20, the charging control method as described in any of the above is implemented.

[0098] In the above - mentioned embodiments, it can be implemented in whole or in part by software, hardware, firmware, or any other combination. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are generated in whole or in part. The computer can be a general - purpose computer, a special - purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer - readable storage medium or transmitted from one computer - readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center in a wired manner (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wirelessly (such as infrared, wireless, microwave, etc.). The computer - readable storage medium can be any available medium that a computer can access or a data storage device such as a server, data center, etc. that contains one or more integrated available media. The available media can be magnetic media (such as floppy disks, hard disks, magnetic tapes), optical media (such as digital video discs (DVDs)), or semiconductor media (such as solid - state disks (SSDs)), etc.

[0099] In the description of this specification, the descriptions referring to the terms "certain embodiments", "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials, or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of the present application. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiments or examples. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0100] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of the said features. In the description of the present application, "a plurality" means at least two, such as two, three, unless otherwise specifically and clearly defined.

[0101] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A charging control method for controlling a charging loop, the charging loop comprising a battery pack and a photovoltaic module and an inverter for charging the battery pack, characterized in that, The charging control method includes: Obtaining the current standard charging current value of the battery pack and the initial setting value of the charging current of the photovoltaic module; Obtaining the actual charging current value of the photovoltaic module; When the difference between the actual charging current value and the initial setting value is less than a predetermined value, updating the initial setting value to a first updated setting value, where the first updated setting value is equal to the initial setting value plus a step-up current value; When the difference between the actual charging current value and the initial setting value is greater than or equal to the predetermined value, updating the initial setting value to a second updated setting value, where the second updated setting value is equal to the actual charging current value plus a step-up current value. When the first updated setting value is greater than the standard charging current value, updating the first updated setting value to a third updated setting value, where the third updated setting value is equal to the standard charging current value; and when the second updated setting value is greater than the standard charging current value, updating the second updated setting value to a fourth updated setting value, where the fourth updated setting value is equal to the standard charging current value, and calculating the set value of the charging current of the inverter, where the set value is the difference between the standard charging current value and the actual charging current value.

2. The charging control method according to claim 1, wherein The obtaining the current standard charging current value of the battery pack and the initial setting value of the charging current of the photovoltaic module; includes: Determining the standard charging current value according to the charging curve, current temperature value and voltage value of the battery pack.

3. The charging control method according to claim 1, characterized in that The predetermined value is 0.2A.

4. The charging control method according to claim 1, wherein The step-up current value is less than or equal to the maximum mutation value of the charging current that the battery pack can withstand.

5. The charging control method according to claim 1, wherein The control method further includes: After a preset time from determining the set value, re-obtaining the standard charging current value and the initial setting value, where the standard charging current value is determined according to the charging curve, current temperature value and voltage value of the battery pack, and the initial setting value is the first updated setting value, the second updated setting value, the third updated setting value or the fourth updated setting value.

6. The charging control method according to claim 5, wherein The preset time is the response time of the charging loop.

7. A charging control device for controlling a charging loop, the charging loop including a battery pack, a photovoltaic module and an inverter for charging the battery pack, characterized in that, The charging control device includes: A first obtaining module for obtaining the current standard charging current value of the battery pack and the initial setting value of the charging current of the photovoltaic module; A second obtaining module for obtaining the actual charging current value of the photovoltaic module; A first calculating module for updating the initial setting value to a first updated setting value when the difference between the actual charging current value and the initial setting value is less than or equal to a predetermined value, where the first updated setting value is equal to the initial setting value plus a step-up current value; A second calculation module, configured to update the initial setting value to a second updated setting value when the difference between the actual charging current value and the initial setting value is greater than the predetermined value, where the second updated setting value is equal to the actual charging current value plus a step-up current value; to update the first updated setting value to a third updated setting value when the first updated setting value is greater than the standard charging current value, where the third updated setting value is equal to the standard charging current value; and to update the second updated setting value to a fourth updated setting value when the second updated setting value is greater than the standard charging current value, where the fourth updated setting value is equal to the standard charging current value, and calculate a set value of the charging current of the inverter, where the set value is the difference between the standard charging current value and the actual charging current value.

8. A charging control system, characterized in that, Comprising a processor and a memory, the memory storing a computer program, which when executed by the processor causes the processor to implement the instructions of the charging control method according to any one of claims 1-6.

9. A non-volatile computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program, which when executed by a processor, implements the charging control method according to any one of claims 1-6.

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