Power regulation and control method of energy storage equipment and energy storage equipment

Abstract

The invention relates to the technical field of energy storage, in particular to a power regulation and control method of energy storage equipment and the energy storage equipment. The power regulation and control method of the energy storage equipment comprises the following steps: acquiring real-time output power and overload limiting power of the energy storage equipment; according to the real-time output power and the overload limiting power, determining whether the energy storage equipment is in overload output; in response to overload output of the energy storage equipment, before the energy storage equipment triggers an overload protection action, reducing the output power of the target output port according to a first difference value between the real-time output power and the overload limiting power; and in response to the situation that the energy storage equipment is not in overload output, determining the maximum allowable output power of the target output port according to a second difference value between the real-time output power and the overload limiting power, and controlling the output power of the target output port to be not greater than the maximum allowable output power. Through the power regulation and control method of the energy storage equipment, overload protection of the energy storage equipment can be avoided as much as possible, and meanwhile the utilization rate and the output efficiency of the energy storage equipment can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of energy storage, in particular to a power regulation method of an energy storage device and the energy storage device. BACKGROUND

[0002] At present, portable and small-capacity mobile energy storage products have a high popularity rate in the fields of outdoor camping, traveling and business trips, and become a popular portable power supply, because they have multiple discharge modes, especially integrated AC (Alternating Current) charging and discharging mode, and the battery capacity is much larger than that of traditional power banks.

[0003] However, in order to realize the portable function, the battery capacity of the mobile energy storage product is generally much smaller than that of other conventional energy storage products, usually below 500WH (Watt-Hour), and AC discharge is required to be prioritized. In actual application, when the power of AC discharge is large, it will occupy the remaining amount that should be left for DC load, causing the energy storage device to easily overload output.

[0004] In related technologies, in order to prevent system output overload, the energy storage device is directly protected from overloading, or the user manually turns off some secondary loads, or turns off part of DC (Direct Current) discharge, or even all DC discharge, to prioritize AC discharge. However, the DC load that needs to maintain power supply, especially the DC load with variable power supply, will inevitably be affected, thereby affecting the user's product use experience and causing many unnecessary after-sales problems. SUMMARY

[0005] Therefore, the present application aims to provide a power regulation method of an energy storage device and the energy storage device, which can solve the problem of affecting the continuous power supply of DC load due to the priority of AC discharge in related technologies, thereby preventing system overload while improving user experience and device reliability in a multi-load scenario.

[0006] To achieve the above-mentioned purpose, the first aspect of the present application provides a power regulation method of an energy storage device.

[0007] The second aspect of the present application provides an energy storage device.

[0008] According to a first aspect of the present application, a power regulation method of an energy storage device is provided. The energy storage device includes a plurality of output ports, and the plurality of output ports includes at least one target output port supporting adjustable output power. The power regulation method of the energy storage device includes: obtaining real-time output power and overload limit power of the energy storage device; determining whether the energy storage device is in overload output according to the real-time output power and the overload limit power; in response to the energy storage device being in overload output, reducing the output power of the target output port according to a first difference between the real-time output power and the overload limit power before the energy storage device triggers an overload protection action; and in response to the energy storage device not being in overload output, determining a maximum allowable output power of the target output port according to a second difference between the real-time output power and the overload limit power, and controlling the output power of the target output port to be not greater than the maximum allowable output power.

[0009] In the above technical solution, since the target output port supports adjustable output power, the energy storage device can flexibly adjust the output power of the target output port according to the real-time output power and the overload limit power of the energy storage device. By judging the running state of the energy storage device and flexibly adopting different regulation strategies to realize power regulation, the energy storage device can be kept in a safe running range as much as possible, avoiding safety hazards caused by overload, and also improving the utilization rate and output efficiency of the energy storage device.

[0010] In some technical solutions, the reducing of the output power of the target output port according to the first difference between the real-time output power and the overload limit power specifically includes: obtaining a current output power of the target output port; determining a power reduction amount of the target output port according to the current output power; in a case where the power reduction amount is greater than or equal to the first difference, reducing the current output power of the target output port according to the first difference; and in a case where the power reduction amount is less than the first difference, controlling the energy storage device to perform overload protection.

[0011] In the above technical solution, by comparing the power reduction amount and the first difference, it is determined whether to perform power reduction, thereby avoiding unnecessary power waste and adjustment time.

[0012] In some technical solutions, the target output port is provided with a working power lower limit. The determination of the power reduction amount of the target output port according to the current output power specifically includes: in a case where the current output power is less than the working power lower limit, determining the power reduction amount to be zero; and in a case where the current output power is greater than or equal to the working power lower limit, determining the power reduction amount according to a difference between the current output power and the working power lower limit.

[0013] In the technical solution, the working power lower limit is set to effectively protect the load device from insufficient power. The determination of the power reduction amount is based on the difference between the current output power and the working power lower limit, so that when the power needs to be reduced, the power value that can be reduced can be quickly and accurately determined, thereby avoiding unnecessary power waste and adjustment time.

[0014] In some technical solutions, the determination of whether the energy storage device is in overload output according to the real-time output power and the overload limit power specifically includes: in the case that the real-time output power is greater than the overload limit power and the duration is greater than the preset duration, it is determined that the energy storage device is in overload output.

[0015] In the technical solution, the duration parameter is introduced for judgment. Only when the real-time output power of the energy storage device exceeds the overload limit power for a duration greater than the preset duration, it is determined that the device is in overload output. In this way, false positives of device overload due to short-term power fluctuations can be avoided, and the accuracy and reliability of overload determination can be improved.

[0016] In some technical solutions, the energy storage device includes a battery management module, and the battery management module has multiple levels of overload working conditions. The overload limit power is the power lower limit value in the multiple levels of overload working conditions. In response to the energy storage device being in overload output, the output power of the target output port is reduced according to the first difference between the real-time output power and the overload limit power before the energy storage device triggers an overload protection action. Specifically, in response to the energy storage device being in overload output, the power upper limit value of a first level of overload working condition in the multiple levels of overload working conditions of the battery management module is obtained. In the case that the real-time output power is less than or equal to the power upper limit value, the output power of the target output port is reduced according to the first difference between the real-time output power and the overload limit power before the energy storage device triggers an overload protection action. In the case that the real-time output power is greater than the power upper limit value, the energy storage device is controlled to perform overload protection.

[0017] In the technical solution, only in the case of a first level of overload working condition of the energy storage device, the power reduction process is performed. Since in the first level of overload working condition, although the energy storage device is in an overload state, it has not yet reached the critical point of damage. At this time, by reducing the power, the output power can be pulled back to a safe range, thereby avoiding device shutdown caused by directly triggering overload protection.

[0018] In some technical solutions, the target output port is provided with a working power upper limit and a working power lower limit. The maximum allowed output power is less than or equal to the working power upper limit and greater than or equal to the working power lower limit.

[0019] In this way, the maximum allowed output power can meet the normal requirements of the load and will not exceed the bearing capacity of the target output port.

[0020] In some embodiments, the target output port comprises a USB-C output port.

[0021] In some embodiments, the target output port comprises a USB-C output port.

[0022] In some embodiments, the upper limit of the working power is 100W, and the lower limit of the working power is 30W.

[0023] According to a second aspect of the present application, a power storage device is provided, comprising: a master control board, configured to perform the steps of the power regulation method of the power storage device according to any one of the above embodiments; a battery management module connected to the master control board; an inverter connected to the master control board and the battery management module, configured to realize AC discharge; a plurality of output ports connected to the master control board; and at least one target output port supporting adjustable output power in the plurality of output ports.

[0024] Therefore, the power storage device has all the advantages of any one of the above embodiments, which will not be repeated here.

[0025] In some embodiments, the target output port comprises a USB-C output port; and the plurality of output ports further comprise at least one of an AC discharge output port, a vehicle charging and discharging output port, a USB-A output port, and a lighting output port. In this way, the functionality and practicality of the power storage device can be improved.

[0026] Additional aspects and advantages of the embodiments of the present application will become apparent from the following description, or will be learned by practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is one of the flowcharts of the power regulation method of the power storage device according to some embodiments of the present application;

[0028] Figure 2 is one of the flowcharts of the power regulation method of the power storage device according to some embodiments of the present application;

[0029] Figure 3 is one of the flowcharts of the power regulation method of the power storage device according to some embodiments of the present application;

[0030] Figure 4 is one of the flowcharts of the power regulation method of the power storage device according to some embodiments of the present application;

[0031] Figure 5 is a structural schematic diagram of the power storage device according to some embodiments of the present application.

[0032] Reference signs:

[0033] 100, master board; 200, battery management module; 300, inverter; 400, output port; 411, AC discharge output port; 412, vehicle charging and discharging output port; 413, USB-A output port; 414, USB-C output port; 415, lighting output port. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art belong to the scope of protection of the present application.

[0035] The terms "first", "second", and the like in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are usually a class, not limited to the number of objects, for example, the first object can be one or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / ", generally represents a "or" relationship between the front and rear associated objects.

[0036] The power regulation method of the energy storage device and the energy storage device provided by the embodiments of the present application will be described in detail below in combination with specific embodiments and application scenarios. Figures 1 to 5

[0037] Referring to Figure 1 In some embodiments, the present application provides a power regulation method of an energy storage device, wherein the energy storage device comprises a plurality of output ports, the plurality of output ports comprises at least one target output port supporting adjustable output power, and the power regulation method of the energy storage device comprises the following steps:

[0038] S102, acquiring real-time output power and overload limit power of the energy storage device;

[0039] S104, determining whether the energy storage device is in overload output according to the real-time output power and the overload limit power;

[0040] S106, in response to the energy storage device being in overload output, reducing the output power of the target output port according to a first difference between the real-time output power and the overload limit power before the energy storage device triggers an overload protection action.​

[0041] S108, in response to the energy storage device not being in overload output, determining a maximum allowed output power of the target output port according to a second difference value between the real-time output power and the overload limit power, and controlling the output power of the target output port to be not greater than the maximum allowed output power.

[0042] Specifically, the target output port supports adjustable output power through PPS (Programmable Power Supply Standard) protocol. The real-time output power is the sum of the output powers of all working output ports of the energy storage device at the current time. The overload limit power is the output power threshold that the energy storage device can withstand for safe operation. By comparing the real-time output power and the overload limit power, it can be determined whether the energy storage device is in an overload output state. If the real-time output power is greater than the overload limit power, it is determined that the energy storage device is in an overload output state; if the real-time output power is less than or equal to the overload limit power, it is determined that the energy storage device is in an unoverload output state. By identifying the running state of the energy storage device, clear guidance is provided for subsequent different control strategies.

[0043] In the case that the energy storage device is in overload output, i.e. in an overload output state, before the energy storage device triggers normal protection actions (such as overload protection circuit cutting off the output, etc.), the output power of the target output port is reduced according to the first difference value between the real-time output power and the overload limit power, which directly reflects the degree of overload of the energy storage device. The first difference value is equal to the real-time output power minus the overload limit power. This can flatten the part of power that exceeds the overload, so that the output power of the energy storage device falls below the overload limit power of the energy storage device. In this way, power regulation can be performed in advance before the energy storage device triggers the overload protection action, thereby avoiding sudden cutting off of the output due to the triggering of the protection action caused by overload, which can cause impact and damage to the connected device. The output capacity can be maintained under the premise of ensuring the safety of the energy storage device, thereby reducing the impact on the load device.

[0044] And in the case that the energy storage device is not in overload output, i.e. in an unoverload output state (normal working), the maximum allowed output power of the target output port is determined according to the second difference value between the real-time output power and the overload limit power, which represents the remaining available power capacity of the energy storage device at the current time. The second difference value is equal to the overload limit power minus the real-time output power. By controlling the output power of the target output port to be not greater than the maximum allowed output power, the remaining capacity of the energy storage device can be optimally distributed under the premise of safety, so that the target output port can output as much electrical energy as possible according to the actual demand, thereby improving the utilization rate and output efficiency of the device and providing more efficient power supply for users.

[0045] In the above embodiments, since the target output port supports output power adjustment, the energy storage device can flexibly adjust the output power of the target output port according to the real-time output power and the overload limit power of the energy storage device. By judging the running state of the energy storage device and flexibly adopting different regulation strategies to realize power regulation, the energy storage device can be kept within a safe running range, avoiding safety hazards caused by overload, and also improving the utilization rate and output efficiency of the energy storage device.

[0046] With reference to Figure 2 In some embodiments, the output power of the target output port is reduced according to the first difference value, specifically including:

[0047] S202, obtaining the current output power of the target output port;

[0048] S204, determining the power reduction quota of the target output port according to the current output power;

[0049] S206, in the case that the power reduction quota is greater than or equal to the first difference value, reducing the current output power of the target output port according to the first difference value;

[0050] S208, in the case that the power reduction quota is less than the first difference value, controlling the energy storage device to perform overload protection.

[0051] In the above embodiments, first, the current output power of the target output port is obtained. The working state of the target output power (such as idle or load) is judged according to the current output power of the target output port. Then, the power reduction quota of the target output port is determined according to the current output power of the target output port, combined with the load connected to the target output port and the parameters of the target output port. If the power reduction quota is greater than or equal to the first difference value, it means that the existing overload risk can be eliminated by reducing the output power of the target output port, so the current output power of the target output port can be reduced according to the first difference value, so that the real-time output power of the energy storage device is reduced to a safe range. If the power reduction quota is less than the first difference value, it means that even if the current output power of the target output port is reduced according to the first difference value, the current output power of the energy storage device will still be higher than the overload limit power, and the overload risk still exists; at this time, there is no meaning to reduce the current output power of the target output port, so in the case that the power reduction quota is less than the first difference value, the energy storage device performs normal overload protection action. Thus, the safety and reliability of the energy storage device can be improved, and unnecessary power waste and adjustment time can be avoided.

[0052] In some embodiments, the target output port is provided with a working power lower limit, and the determination of the available power reduction amount of the target output port according to the current output power specifically comprises: determining the available power reduction amount as zero when the current output power is less than the working power lower limit; and determining the available power reduction amount according to the difference between the current output power and the working power lower limit when the current output power is greater than or equal to the working power lower limit.

[0053] In the above embodiments, the working power lower limit is the minimum power required for the load connected to the target output port to operate normally. If the target output port is lower than the working power lower limit, the load cannot operate normally. Therefore, the output power of the target output port can only be reduced to the working power lower limit at the lowest when the load is connected.

[0054] Therefore, if the current output power of the target output port is less than the working power lower limit, it means that the available power reduction amount of the target output port has been overdrafted in advance, or the target output port is empty or even not outputting. At this time, it is meaningless to reduce the power of the target output port, and the available power reduction amount can be determined as zero. At this time, the operation of reducing the power is stopped, and the normal overload protection is performed by the energy storage device to avoid the load from being unable to operate normally due to further reduction of the power. If the current output power of the target output port is greater than or equal to the working power lower limit, the difference between the current output power and the working power lower limit is determined as the available power reduction amount.

[0055] In the above embodiments, by setting the working power lower limit, the load device can be effectively protected from power shortage. When the output power is close to or lower than the working power lower limit, the operation of reducing the power is stopped in time to protect the load. The determination of the available power reduction amount is based on the difference between the current output power and the working power lower limit, so when the power needs to be reduced, the power value that can be reduced can be quickly and accurately determined, thereby avoiding unnecessary power waste and adjustment time.

[0056] In some embodiments, the determination of whether the energy storage device is in overload output according to the real-time output power and the overload limit power specifically comprises:

[0057] In the case that the real-time output power is greater than the overload limit power and the duration is greater than the preset duration, it is determined that the energy storage device is in overload output.

[0058] In actual operation, the energy storage device can have short-term power fluctuations, such as sudden start or stop of the load, transient interference of the power grid, etc. These conditions can cause the instantaneous output power of the energy storage device to exceed the overload limit power in a short time. But this change will be flat in a short time, that is, it will return to the normal working level. If the energy storage device is determined to be in an overload output at this time, it is not accurate. Therefore, in the above embodiment, the duration parameter is introduced for judgment. Only when the real-time output power of the energy storage device exceeds the overload limit power for a duration greater than the preset duration, it is determined that the device is in an overload output state. In this way, it can be avoided that the device is misjudged as being overloaded due to short-term power fluctuations, and the accuracy and reliability of the overload judgment are improved.

[0059] With reference to Figure 3 In some embodiments, the energy storage device includes a battery management module, and the battery management module has multiple levels of overload working conditions. The overload limit power is the lower limit value of the power in the multiple levels of overload working conditions. In response to the energy storage device being in an overload output, the output power of the target output port is reduced according to the first difference between the real-time output power and the overload limit power before the energy storage device triggers an overload protection action, specifically including:

[0060] S302, in response to the energy storage device being in an overload output, obtaining a power upper limit value of a first level of overload working condition in the multiple levels of overload working conditions of the battery management module;

[0061] S304, in the case that the real-time output power is less than or equal to the power upper limit value, reducing the output power of the target output port according to the first difference between the real-time output power and the overload limit power before the energy storage device triggers an overload protection action;

[0062] S306, in the case that the real-time output power is greater than the power upper limit value, controlling the energy storage device to perform an overload protection.

[0063] The carrying capacity of the energy storage device is related to the carrying capacity of the battery management module. The overload state of the battery management module is divided into multiple levels of working conditions (such as first, second and third levels), each level of overload working condition corresponds to a different power upper limit value, and the power upper limit value of the first level of overload working condition is less than the power upper limit value of the second level of overload working condition, and the power upper limit value of the second level of overload working condition is less than the power upper limit value of the third level of overload working condition, that is, it increases gradually. This means that the overload is getting more and more serious.

[0064] In the above embodiment, the overload limit power is the lower limit value of the power, i.e., the lower limit value of the power in the first overload condition. When determining the output of the energy storage device in the overload condition, the upper limit value of the power in the first load condition of the battery management module is obtained. When the real-time output power is less than or equal to the upper limit value of the power in the first load condition, it means that the energy storage device is in the first overload condition, and at this time, the derating process is performed. When the real-time output power is greater than the upper limit value of the power in the first load condition, it means that the energy storage device is in a second overload condition or above, and at this time, the normal overload protection is performed by the energy storage device.

[0065] In other words, in the above embodiment, the derating process is only performed when the energy storage device is in the first overload condition. Since in the first overload condition, although the energy storage device is in an overload state, it has not yet reached the critical point of damage, at this time, through the derating process, the output power can be pulled back to the safe range, thereby avoiding the shutdown of the device caused by directly triggering the overload protection.

[0066] In some embodiments, the target output port is also provided with an upper limit of working power. Among them, the maximum allowed output power is less than or equal to the upper limit of working power, and greater than or equal to the lower limit of working power.

[0067] Specifically, the upper limit of working power is the maximum output power allowed by the target output port, i.e., the rated power. If the output power of the target output port is greater than the upper limit of working power, it will cause damage to the target output port. And the lower limit of working power is the minimum power required for the normal operation of the load connected to the target output port.

[0068] Therefore, in the above embodiment, when determining the maximum allowed output power, the upper limit of working power and the lower limit of working power need to be combined to determine the maximum allowed output power, so that the maximum allowed output power can meet the normal requirements of the load, and will not exceed the bearing capacity of the target output port.

[0069] In some embodiments, the target output port includes a USB-C output port. The USB-C output port has a PPS protocol, and the load connected thereto supports adjustable output power. And the USB-C output port has very high versatility. At present, a large number of electronic devices, such as smart phones, tablet computers, notebook computers, smart watches, and some digital cameras, use USB-C output ports for charging. Determining the USB-C output port as the target output port can cover many common devices and meet the needs of users for charging various devices.

[0070] In the above embodiment, the upper limit of working power of the USB-C output port is set to 100 watts (W), and the lower limit of working power is set to 30 watts.

[0071] The power regulation method of the energy storage device provided by the embodiments of the present application is described in detail below taking the USB-C output port as an example.

[0072] With reference to Figure 4 , specifically comprising the following steps:

[0073] S402, determine and compare the current output power of the energy storage device and the overload limit power.

[0074] S404, judge whether the current output power is less than the overload limit power? If no (N), go to S406; if yes (Y), end.

[0075] S406, judge whether the device is currently overloaded? If no, go to S408; if yes, go to S410.

[0076] S408, calculate the second difference value between the current output power and the overload limit power, and set the maximum allowable output power of the USB-C output port according to the difference value.

[0077] S410, judge whether the secondary overload has been reached? If yes, go to S420; if no, go to S412;

[0078] S412, is the current output power of the USB-C output port greater than 30W? If yes, go to S414; if no, go to S420.

[0079] S414, calculate the reducible power of the USB-C output port and the power exceeding the overload of the device.

[0080] S416, is the reducible power greater than the power exceeding the overload of the device? If yes, go to S418; if no, go to S420.

[0081] S418, perform derating processing on the USB-C output port, and the maximum allowable output power of the USB-C output port = the current output power of the USB-C output port - the power exceeding the overload of the device.

[0082] S420, the device performs normal overload protection judgment and protection action.

[0083] With reference to Figure 5 In some embodiments, the present application also provides an energy storage device, comprising: a main control board 100, a battery management module 200, an inverter 300 and a plurality of output ports 400.

[0084] The main control board 100 is used to execute the steps of the power regulation method for the energy storage device disclosed in any of the above embodiments. The battery management module 200 is connected to the main control board 100. The inverter 300 is connected to both the main control board 100 and the battery management module 200, and is used to achieve AC discharge. Multiple output ports 400 are connected to the main control board 100; at least one of the multiple output ports 400 includes a target output port that supports adjustable output power. The energy storage device possesses all the beneficial effects of any of the above embodiments, which will not be elaborated further here.

[0085] In some embodiments, the target output port includes a USB-C output port 414; wherein the plurality of output ports further includes at least one of an AC discharge output port 411, a vehicle charging / discharging output port 412, a USB-A output port 413, and a lighting output port 415. This improves the functionality and practicality of the energy storage device.

[0086] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0087] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a computer software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0088] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A method for power conditioning of an energy storage device, the method comprising: The energy storage device includes a plurality of output ports, the plurality of output ports including at least one target output port supporting adjustable output power, and a power regulation method of the energy storage device includes: ​ acquiring real-time output power and overload limit power of the energy storage device; determining whether the energy storage device is in overload output according to the real-time output power and the overload limit power; in response to the energy storage device being in overload output, reducing output power of the target output port according to a first difference between the real-time output power and the overload limit power before the energy storage device triggers an overload protection action; in response to the energy storage device not being in overload output, determining a maximum allowable output power of the target output port according to a second difference between the real-time output power and the overload limit power, and controlling the output power of the target output port to be not greater than the maximum allowable output power.

2. The method of claim 1, wherein, The method of reducing the output power of the target output port according to the first difference between the real-time output power and the overload limit power specifically includes: acquiring current output power of the target output port; determining a reducible power quota of the target output port according to the current output power; in a case where the reducible power quota is greater than or equal to the first difference, reducing the current output power of the target output port according to the first difference; in a case where the reducible power quota is less than the first difference, controlling the energy storage device to perform an overload protection.

3. The method of claim 2, wherein, The target output port is provided with a lower limit of working power; wherein the method of determining the reducible power quota of the target output port according to the current output power specifically includes: in a case where the current output power is less than the lower limit of working power, determining the reducible power quota to be zero; in a case where the current output power is greater than or equal to the lower limit of working power, determining the reducible power quota according to a difference between the current output power and the lower limit of working power.

4. The method of claim 1, wherein, The method of determining whether the energy storage device is in overload output according to the real-time output power and the overload limit power specifically includes: in a case where the real-time output power is greater than the overload limit power and a duration is greater than a preset duration, determining that the energy storage device is in overload output.

5. The method of claim 1, wherein, The energy storage device includes a battery management module, the battery management module having a plurality of overload working conditions, wherein the overload limit power is a lower limit value in the plurality of overload working conditions; in response to the energy storage device being in overload output, the method of reducing the output power of the target output port according to the first difference between the real-time output power and the overload limit power before the energy storage device triggers an overload protection action specifically includes: in response to the energy storage device being in overload output, acquiring a power upper limit value of a first overload working condition in the plurality of overload working conditions of the battery management module; in a case where the real-time output power is less than or equal to the power upper limit value, reducing the output power of the target output port according to the first difference between the real-time output power and the overload limit power before the energy storage device triggers an overload protection action; In a case that the real-time output power is greater than the upper limit of power, the energy storage device is controlled to perform overload protection.

6. The method of power conditioning of an energy storage device according to any one of claims 1 to 5, wherein, The target output port is provided with an upper limit of working power and a lower limit of working power. The maximum allowed output power is less than or equal to the upper limit of working power and greater than or equal to the lower limit of working power.

7. The method of claim 6, wherein the power conditioning is performed by a controller. The target output port comprises a USB-C output port.

8. The method of claim 7, wherein the power conditioning is performed by a controller. The upper limit of working power is 100 W and the lower limit of working power is 30 W.

9. An energy storage device, characterized by, The method comprises the following steps: A main control board is used to execute the steps of the power regulation method of the energy storage device according to any one of claims 1 to 8. A battery management module is connected with the main control board. An inverter is connected with the main control board and the battery management module and is used to realize AC discharge. A plurality of output ports are connected with the main control board, and at least one target output port supporting adjustable output power is included in the plurality of output ports.

10. The energy storage device of claim 9, wherein, The target output port comprises a USB-C output port, and the plurality of output ports further comprise at least one of an AC discharge output port, a vehicle charging and discharging output port, a USB-A output port and an illumination output port.

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