Energy storage device and charge-discharge power control method of energy storage device

Abstract

This application discloses an energy storage device and a method for controlling the charging and discharging power of the energy storage device. The energy storage device includes multiple input interfaces and multiple output interfaces. The method includes: within a preset period, in response to at least one power input at the multiple input interfaces and at least one power output at the multiple output interfaces, obtaining the total input power of all input interfaces with power input and obtaining the total output power of all output interfaces with power output; determining whether to perform power adjustment based on the total input power, the total output power, and preset power judgment conditions; adjusting the total input power of the multiple input interfaces when the difference between the total input power and the total output power satisfies a first judgment condition in the power judgment conditions; or adjusting the total output power when the difference between the total input power and the total output power satisfies a second judgment condition in the power judgment conditions. Through the above method, this application can improve the charging and discharging efficiency of the energy storage device.

Description

Technical Field

[0001] This application relates to the field of energy management technology, and in particular to energy storage devices and methods for controlling the charging and discharging power of energy storage devices. Background Technology

[0002] An energy storage device is a device capable of inputting and outputting energy and matter, converting energy, and storing energy. Energy storage devices are also widely used in people's daily lives.

[0003] Typically, during the charging process, energy storage devices may also charge other electronic devices. Since the charging and discharging control strategies of energy storage devices are usually independent, the energy storage device may experience slow charging or rapid power loss when charging and discharging simultaneously, resulting in low charging and discharging efficiency. Summary of the Invention

[0004] The embodiments of this application provide an energy storage device and a method for controlling the charging and discharging power of the energy storage device, which can improve the charging and discharging efficiency of the energy storage device.

[0005] In a first aspect, embodiments of this application provide a method for controlling the charging and discharging power of an energy storage device, the energy storage device including multiple input interfaces and multiple output interfaces, the method comprising:

[0006] Within a preset period, in response to the presence of at least one power input at multiple input interfaces and at least one power output at multiple output interfaces, the total input power of all input interfaces with power input is obtained, and the total output power of all output interfaces with power output is obtained.

[0007] Based on the total input power, total output power, and preset power judgment conditions, determine whether to perform power adjustment;

[0008] When the difference between the total input power and the total output power meets the first judgment condition in the power judgment condition, the total input power corresponding to multiple input interfaces is adjusted; or, when the difference between the total input power and the total output power meets the second judgment condition in the power judgment condition, the total output power corresponding to multiple output interfaces is adjusted.

[0009] Secondly, embodiments of this application provide an energy storage device, which includes multiple input interfaces, multiple output interfaces, and a processing circuit. The processing circuit is electrically connected to the multiple input interfaces and the multiple output interfaces, respectively; the processing circuit is used to execute the charging and discharging power control method as described in the above embodiments.

[0010] The beneficial effects of this application are as follows: Unlike existing technologies, the energy storage device of this application has multiple input interfaces and multiple output interfaces. When at least one input interface has power input and at least one output interface has power output, it can obtain the total input power of all input interfaces with power input and the total output power of all output interfaces with power output. It then determines whether the difference between the total input power and the total output power satisfies the first or second judgment condition in the power judgment conditions. If satisfied, the total input power or the total output power is adjusted. Therefore, this application can simultaneously consider the total input power and total output power of the energy storage device, and adjust the output and input conditions of the energy storage device according to the total input power of the input interfaces, the total output power of the output interfaces, and the preset power judgment conditions. This addresses situations where the energy storage device charges slowly or loses power quickly, thereby improving the charging and discharging efficiency of the energy storage device. Attached Figure Description

[0011] Figure 1 This is a schematic block diagram of a circuit structure of an embodiment of the energy storage device of this application;

[0012] Figure 2 This is a schematic diagram of the process steps of an embodiment of the power control method for the energy storage device of this application;

[0013] Figure 3 This is a schematic diagram of another process step in an embodiment of the power control method for the energy storage device of this application;

[0014] Figure 4 This is a schematic diagram of another process step in an embodiment of the power control method for the energy storage device of this application. Detailed Implementation

[0015] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0016] The following is an exemplary description of an energy storage device through an embodiment of an energy storage device.

[0017] Energy storage device 1 is a device that can store energy through a medium and release it when needed. In other words, energy storage device 1 can realize the input and output of energy and matter, as well as the conversion and storage of energy. As an example, energy storage device 1 can be an outdoor mobile power supply, a home energy storage device, or other device or equipment that can be charged and discharged.

[0018] In some implementations, such as Figure 1 As shown, the energy storage device 1 includes multiple input interfaces 110, multiple output interfaces 120, and a processing circuit 130. The processing circuit 130 is electrically connected to the multiple input interfaces 110 and the multiple output interfaces 120. The processing circuit 130 can be used to execute a charge / discharge power control method.

[0019] Energy storage device 1 can be connected to other power supply devices through input interface 110. Different types of power supply devices can supply power to energy storage device 1 through different input interfaces 110. Energy storage device 1 can be connected to other electronic devices through output interface 120. Different types of electronic devices can receive electrical energy from energy storage device 1 through different output interfaces 120.

[0020] The processing circuit 130 can be used to control and adjust the power input of the input interface 110 and the power output of the output interface 120.

[0021] The processing circuit 130 can also be referred to as a CPU (Central Processing Unit). The processing circuit 130 may be an integrated circuit chip with signal processing and device control capabilities. The processing circuit 130 can also be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), an off-the-shelf programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. The general-purpose processor can be a microprocessor or any conventional processor.

[0022] The processing circuit 130 can be used to obtain the total input power of the input interface 110 and the total output power of the output interface 120 in response to the presence of power input at the input interface 110 and power output at the output interface 120.

[0023] Specifically, if there is power input at input interface 110, it indicates that the energy storage device 1 is connected to the power supply device through input interface 110 and is charging. If there is power output at output interface 120, it indicates that the energy storage device 1 is supplying power to the electronic device through output interface 120. Therefore, when there is power input at input interface 110 and power output at output interface 120, it means that the energy storage device 1 is in a state of charging and discharging simultaneously.

[0024] The processing circuit 130 can be used to detect multiple input interfaces 110 when power input is present at multiple input interfaces 110, and determine the input type of each input interface 110.

[0025] In some implementations, the multiple input interfaces 110 include various input types, and the input types of the input interfaces 110 may include at least one of AC input, DC input, MPPT input, or PD input. For example, the input types of the input interfaces 110 may include AC input, DC input, and MPPT input. Alternatively, the input types of the input interfaces 110 may include AC input, DC input, and PD input. Or, the input types of the input interfaces 110 may only include AC input or DC input.

[0026] For example, if the input type of an input interface 110 is AC input, an external power source can transmit AC power to the energy storage device 1 through the input interface 110. If the input type of an input interface 110 is DC input, an external power source can transmit DC power to the energy storage device 1 through the input interface 110. If the input type of an input interface 110 is photovoltaic input, it indicates that the external power source is a photovoltaic power source and can transmit photovoltaic power to the energy storage device 1 through the input interface 110. If the input type of an input interface 110 is fast charging protocol input, it indicates that the external power source needs to supply power to the energy storage device 1 through the input interface 110 according to the fast charging protocol.

[0027] This configuration can enhance the input control of energy storage device 1, enrich the input types of energy storage device 1, and improve the charging efficiency of energy storage device 1.

[0028] In some embodiments, the multiple output interfaces 120 include various output types, and the output types of the output interfaces 120 include at least one of AC output, DC output, MPPT output, or PD output. For example, the output types of the output interfaces 120 may include AC output, DC output, and MPPT output. Alternatively, the output types of the output interfaces 120 may include DC output, MPPT output, or PD output. Or, the output types of the output interfaces 120 may only include AC output or MPPT output.

[0029] For example, if the output type of an output interface 120 is AC output, the energy storage device 1 can transmit AC power to the electronic product plugged into the output interface 120 through the output interface 120. If the output type of an output interface 120 is DC output, the energy storage device 1 can transmit DC power to the electronic product plugged into the output interface 120 through the output interface 120. If the output type of an output interface 120 is photovoltaic output, it means that the electronic product plugged into the output interface 120 is a product that supports photovoltaic voltage input and needs the energy storage device 1 to transmit photovoltaic voltage. The energy storage device 1 can then transmit photovoltaic voltage to the electronic product through the output interface 120. If the input type of an output interface 120 is fast charging protocol input, the energy storage device 1 needs to supply power to the electronic product plugged into the output interface 120 according to the fast charging protocol.

[0030] This configuration can enhance the output control of energy storage device 1 and enrich the output types of energy storage device 1. It can not only improve the discharge efficiency of energy storage device 1, but also make the output of energy storage device 1 safer.

[0031] The energy storage device 1 may include input interfaces 110 of multiple input types or output interfaces 120 of multiple input types. That is, the energy storage device 1 may include only input interfaces 110 of multiple input types, or only output interfaces 120 of multiple input types, or the energy storage device 1 may include both input interfaces 110 of multiple input types and output interfaces 120 of multiple input types.

[0032] Because the energy storage device 1 may charge too quickly while simultaneously charging and discharging, leading to high temperatures, it may restrict charging or cause overheating and bulging due to a high-temperature limiting mechanism. Alternatively, it may charge slowly or lose power quickly, resulting in low charging and discharging efficiency or even damage. Therefore, the processing circuit 130 can execute a charging and discharging power control method to adjust the charging and discharging of the energy storage device 1 based on preset power judgment conditions and the power input of the input interface 110 and the power output of the output interface 120.

[0033] Based on the structure of the energy storage device 1 described above, as follows: Figures 2 to 4 As shown, Figure 2 and Figure 3 The charging and discharging power control method of energy storage device 1 is shown. Figure 4 for Figure 3 The flowchart illustrates an embodiment of the power distribution method for the energy storage device 1. The charging and discharging power control method for the energy storage device 1 is described below as exemplary:

[0034] S100: Within a preset period, in response to the presence of at least one power input at multiple input interfaces and at least one power output at multiple output interfaces, the total input power of all input interfaces with power input is obtained, and the total output power of all output interfaces with power output is obtained.

[0035] The preset cycle is a period that is set in advance, and the charging and discharging power control method of the energy storage device 1 is executed within the preset cycle. For example, the charging and discharging power control method can be set to be executed once every 1 minute, 3 minutes, 5 minutes or 8 minutes, so each 1 minute, 3 minutes, 5 minutes or 8 minutes is a preset cycle.

[0036] In some implementations, the preset period can also be associated with the time it takes for the charge / discharge power control method to be executed once. For example, if the time for the charge / discharge power control method to be executed once is 5 seconds, then the preset period can also be set to a duration of 5 seconds, meaning that the charge / discharge power control method can be executed once every 5 seconds. This setting allows the charge / discharge power control method to be executed more frequently, thereby improving the charge / discharge efficiency of the energy storage device 1.

[0037] Of course, the preset period can also be related to other factors such as the capacity and speed of the calculation program in the processing circuit 130, and can be set to 20s, 45s, or 1min, or even other durations such as the actual calculation.

[0038] In some implementations, when an external device is inserted, connection detection can be performed on each potentially inserted input interface 110 and each potentially inserted output interface 120 to detect whether any of the output interfaces 120 and input interfaces 110 are in a connected state. If an output interface 120 or input interface 110 is in an unconnected state, it is assumed to be in an unconnected state, and the power of the corresponding output interface 120 or input interface 110 is 0. If an output interface 120 or input interface 110 is in a connected state, it is in a connected state. An output interface 120 in a connected state may have power output, and an input interface 110 in a connected state may have power input.

[0039] In some implementations, after determining that the output interface 120 or the input interface 110 is in a plugged-in state, it can be further determined whether each or some of the input interfaces 110 with plugged-in devices have power input, and whether each or some of the output interfaces 120 with plugged-in devices have power output. After determining that an input interface 110 has power input, the total input power of all input interfaces 110 with power input is obtained. After determining that an output interface 120 has power output, the total output power of all output interfaces 120 with power output is obtained.

[0040] In some implementations, such as Figure 3 As shown, the steps to obtain the total input power of all input interfaces 110 with power input include the following steps S111 to S115:

[0041] S111: Detect power input for multiple input interfaces and obtain the external input power of the input interface with power input.

[0042] The external input power is the input power provided by the power supply equipment to the energy storage device 1. When the input interface 110 is first connected to the power supply equipment, the input power of the input interface 110 at this time can be obtained, and the input power of the input interface 110 at this time is the external input power.

[0043] S112: Compare the external input power corresponding to each input interface with the maximum input power corresponding to that input interface.

[0044] In some cases, if the input power of input interface 110 is too high, the energy storage device 1 may overheat and bulge due to excessively rapid charging. The maximum input power of input interface 110 refers to the maximum input power that input interface 110 can reach without significantly affecting the energy storage device 1. The maximum input power and external input power of input interface 110 may be related to the input type of input interface 110.

[0045] Furthermore, the external input power corresponding to each input interface 110 is compared with the maximum input power corresponding to that input interface 110 to determine whether the external input power exceeds the maximum input power corresponding to that input interface 110.

[0046] S113: In response to an external input power being greater than its corresponding maximum input power, adjust the input power of the corresponding input interface to the corresponding maximum input power.

[0047] When the external input power of an input interface 110 is greater than its corresponding maximum input power, it means that when the input interface 110 is first connected to the power supply equipment, the power supply equipment provides too much input power to the energy storage device 1, which will cause the energy storage device 1 to charge too quickly and easily overheat and bulge.

[0048] Therefore, in response to an external input power greater than the maximum input power, the input power of the input interface 110 can be adjusted to the corresponding maximum input power so that the input power of the input interface 110 has little impact on the energy storage device 1, while also ensuring the charging speed of the energy storage device 1.

[0049] S114: In response to an external input power being less than or equal to its corresponding maximum input power, maintain the input power of the corresponding input interface at the corresponding external input power.

[0050] In some implementations, when the external input power of an input interface 110 is less than or equal to the maximum input power, it indicates that the input power provided by the power supply equipment to the energy storage device 1 is within a safe range and is unlikely to have a significant impact on the energy storage device 1.

[0051] Therefore, in response to an external input power less than or equal to the maximum input power, the input power of the corresponding input interface can be maintained at the corresponding external input power. This not only improves the safety of the energy storage device 1 during charging, but also improves the charging speed and efficiency of the energy storage device 1.

[0052] S115: Sum the input power of multiple input interfaces to obtain the total input power.

[0053] Specifically, the processing circuit 130 sums up the input power of all input interfaces 110 to obtain the total input power. The total input power is the total input power received by the energy storage device 1.

[0054] In some implementations, such as Figure 3 As shown, the step of obtaining the total output power of all output interfaces with power input may include the following steps S121 to S125:

[0055] S121: Detect the power input of multiple output interfaces and obtain the external output power of the output interface with power output.

[0056] The external output power refers to the input power required by other electronic devices after they are connected to the energy storage device 1. Since the output interface 120 requires a certain amount of input power after being plugged into other electronic devices, the output power of the output interface 120 is typically the input power of those devices. Therefore, when the output interface 120 is first connected to another electronic device, its output power at that moment can be obtained, and this output power is the external output power.

[0057] S122: Compare the external output power corresponding to each output interface with the maximum output power corresponding to that output interface.

[0058] In some cases, if the output power of the output interface 120 is too high, the energy storage device 1 may be damaged due to excessively rapid discharge, resulting in a decrease in the capacity of the energy storage device 1. The maximum output power of the output interface 120 refers to the maximum output power that the output interface 120 can achieve without significantly affecting the energy storage device 1. The maximum output power and external output power of the output interface 120 may be related to the output type of the output interface 120.

[0059] Furthermore, the external output power corresponding to each output interface 120 is compared with the maximum input power corresponding to that output interface 120 to determine whether the external output power exceeds the maximum output power corresponding to that output interface.

[0060] S123: In response to an external output power being equal to or greater than its corresponding maximum output power, adjust the output power of the corresponding output interface to the corresponding maximum output power.

[0061] When the external output power of an output interface 120 exceeds its corresponding maximum output power, it indicates that the output power of the output interface 120 is too high when connected to other devices. This can cause the energy storage device 1 to discharge too quickly and be easily damaged. Therefore, in response to the external output power exceeding the maximum output power, the output power of the output interface 120 can be adjusted to the corresponding maximum output power to minimize its impact on the energy storage device 1 while ensuring the discharge speed of the energy storage device 1.

[0062] S124: In response to an external output power being less than its corresponding maximum output power, maintain the output power of the corresponding output interface at the corresponding external output power.

[0063] In some implementations, when the external output power of an output interface 120 is less than or equal to the maximum output power corresponding to that output interface 120, it indicates that the output power of the energy storage device 1 is within a safe range, and it is unlikely to have a significant impact on the energy storage device 1. Therefore, in response to the external output power being less than or equal to the corresponding maximum output power, the output power of the output interface 120 can be maintained at the corresponding external output power. This not only improves the safety of the energy storage device 1 during discharge but also improves the discharge speed and efficiency of the energy storage device 1.

[0064] S125: Sum the output power of multiple output interfaces to obtain the total output power.

[0065] Specifically, the processing circuit 130 sums the output power of all output interfaces 120 to obtain the total output power. The total output power is the total output power of the energy storage device 1.

[0066] S200: Based on the total input power, total output power, and preset power judgment conditions, determine whether to perform power adjustment.

[0067] The preset power judgment condition can be set in advance based on the judgment conditions of the energy storage device 1. The preset power judgment condition can reflect the charging and discharging status of the energy storage device 1. When the energy storage device 1 has at least one power input and at least one power output, the obtained total input power and the obtained total output power are matched and compared with the preset power judgment condition to determine whether the obtained total input power and the obtained total output power meet the preset power judgment condition, so as to confirm whether power adjustment should be performed.

[0068] In some implementations, the preset power judgment condition may include multiple sub-conditions. For example, the preset power judgment condition may include a first judgment condition and a second judgment condition, wherein the first judgment condition indicates that the energy storage device 1 is charging too fast while charging and discharging simultaneously, and the second judgment condition indicates that the energy storage device 1 is discharging too fast while charging and discharging simultaneously.

[0069] S300: When the difference between the total input power and the total output power meets the first judgment condition in the power judgment condition, adjust the total input power corresponding to multiple input interfaces; or, when the difference between the total input power and the total output power meets the second judgment condition in the power judgment condition, adjust the total output power corresponding to multiple output interfaces.

[0070] In some embodiments, the energy storage device 1 may have an input limiting power. The input limiting power can be the maximum input power that the energy storage device 1 can withstand.

[0071] In some implementations, the first determination condition may be that the total input power is greater than the total output power, and the first difference between the total input power and the total output power is greater than the input limit power.

[0072] Specifically, the comparison between the total input power and the total output power can characterize the charging and discharging status of energy storage device 1 during simultaneous charging and discharging, thus determining whether the battery in energy storage device 1 is charging or discharging. After determining that the total input power is greater than the total output power, a first difference between the total input power and the total output power is calculated. This first difference represents the portion of the total input power that can be converted into electricity by energy storage device 1. The first difference can be the absolute value of the difference between the total input power and the total output power.

[0073] As an example, the total output power of the energy storage device 1 can be 350W, and the total input power of the energy storage device 1 can be 400W. It can be concluded that the total output power is greater than the total input power, and the first difference between the total input power and the total output power is 400W-350W=50W.

[0074] If the first difference exceeds the input power limit, it means that the input power for charging the battery in the energy storage device 1 is too high. In this case, the energy storage device 1 may become overloaded and its temperature will rise higher and higher, which will trigger the high temperature limit and cause the input power to drop significantly, thus affecting the charging efficiency of the energy storage device 1.

[0075] Therefore, when the difference between the total input power and the total output power satisfies the first judgment condition in the power judgment condition, the total input power corresponding to the multiple input interfaces 110 can be further adjusted to reduce the input power of the input energy storage device 1 to the range of the input limit power.

[0076] In some implementations, such as Figure 3 as well as Figure 4 As shown, step S300 may include step S310:

[0077] S310: In response to the first difference being greater than the input power limit, the input power of at least one input interface is reduced to reduce the total input power.

[0078] When the first difference is greater than the input power limit, it indicates that the input power for charging energy storage device 1 exceeds its input power limit. This means energy storage device 1 is about to experience overload, high temperature, and power input limitation, or it may overheat and bulge due to overload. Therefore, the processing circuit 130 can reduce the total input power so that the first difference is less than or equal to the input power limit, thereby controlling the input power supplied to the battery of energy storage device 1 within a safe range. This reduces the likelihood of overload and high temperature in energy storage device 1 leading to power input limitation, improves the safety of energy storage device 1, and increases its charging efficiency.

[0079] In some implementations, step S310 may include step S311:

[0080] S311: The input power of multiple input interfaces is reduced sequentially according to the first preset order until the difference between the current total input power and the current total output power no longer meets the first judgment condition.

[0081] The first preset order can be set in advance according to the number and type of input interfaces 110 and the user's needs.

[0082] Specifically, when reducing the total input power, the input power of each input interface 110 can be reduced sequentially according to a first preset order. After the input power of each input interface 110 is reduced, the difference between the current total input power and the current total output power is compared with a first judgment condition to determine whether the current first difference meets the first judgment condition. If the current first difference meets the first judgment condition, the input power of the next input interface 110 is then reduced. This process continues until the first judgment condition is no longer met. It should be noted that the first preset order can be a pre-set priority order of the input interfaces 110, or it can be a randomly generated priority order of the input interfaces 110 obtained through analysis and calculation.

[0083] In another embodiment, after the input power of each input interface 110 is reduced, if the current first difference still satisfies the first judgment condition, the input power of the multiple input interfaces 110 is reduced again in the first preset order until the difference between the current total input power and the current total output power no longer satisfies the first judgment condition.

[0084] For example, in some implementations, such as Figure 4As shown, the energy storage device 1 includes four input interfaces 110, namely P1, P2, P3, and P4, and each of P1, P2, P3, and P4 has power input. The total input power and total output power are obtained, and a first difference is calculated. If the first difference satisfies a first judgment condition, the input power of each interface is reduced sequentially according to a first preset order. For example, the input power of P1 is reduced, while the input power of P2, P3, and P4 remains unchanged. The current total input power and current total output power are then obtained, and the current first difference is calculated. If the current first difference satisfies the first judgment condition, the input power of P2 is reduced, while the input power of P1, P3, and P4 remains unchanged. The current total input power and current total output power are then obtained, and the current first difference is calculated.

[0085] Similarly, after the input power of one input interface 110 decreases, it is determined whether the current first difference meets the first judgment condition. If it does, the input power of the next input interface 110 is decreased according to the first preset order. If the difference between the current total input power and the current total output power no longer meets the first judgment condition, the input power of each input interface 110 remains unchanged.

[0086] By setting the input power of the input interfaces 110 to be reduced one by one in the first preset order, the reduction of the total input power can be more precise. When the first difference is reduced to less than the input power limit, the charging efficiency and speed of the energy storage device 1 can still be guaranteed.

[0087] In some other embodiments, step S310 may include step S312:

[0088] S312: Synchronously reduce the input power of each input interface once or multiple times until the difference between the current total input power and the current total output power no longer meets the first judgment condition.

[0089] In some implementations, the total input power can be reduced by simultaneously reducing the input power of each input interface 110.

[0090] Specifically, when it is determined that the current first difference is greater than the input limit power, the input power of each input interface 110 is reduced, and then the total input power and the first difference are recalculated, and it is determined whether the current first difference is greater than the input limit power. If the current first difference is still greater than the input limit power, the input power of each input interface 110 is reduced again until the current first difference is less than or equal to the input limit power.

[0091] For example, in some embodiments, the energy storage device 1 includes four input interfaces 110, and all four input interfaces 110 have power input. The total input power and total output power are further obtained, and a first difference is calculated. If the first difference is greater than the input power limit, the input power of the four input interfaces 110 is simultaneously reduced. Then, the current total input power and the first difference are recalculated, and it is determined whether the current first difference is greater than the input power limit. If the first difference is still greater than the input power limit, the input power of the four input interfaces 110 is reduced again until the current first difference is less than or equal to the input power limit.

[0092] By synchronously reducing the input power of each input interface 110 in this way, the adjustment speed of the total input power can be improved. The current first difference can be reduced in a short time, so that the difference between the current total input power and the current total output power no longer meets the first judgment condition. It can also simplify the process of reducing the total input power.

[0093] In some embodiments, when reducing the input power of each input interface 110, the reduction can be based on a preset fixed value, which can be pre-set. Alternatively, in other embodiments, the input power of each input interface 110 can be reduced proportionally according to the proportion of the input power corresponding to each input interface 110. Other methods can also be used to adjust the input power of each input interface 110, which will not be specifically listed here.

[0094] S320: In response to the first difference being less than or equal to the input limit power, the total input power remains unchanged.

[0095] In some implementations, when the first difference is less than or equal to the input limit power, it indicates that the input power of the energy storage device 1 is within a safe range, and therefore the input power of each input interface 110 can be kept constant.

[0096] In some implementations, if the total output power is greater than the total input power, it indicates that the total input power cannot fully support the output power of the energy storage device 1. Therefore, the internal energy of the energy storage device 1 needs to be converted into part of the output power. That is, the total input power plus the output power of the energy storage device 1 itself equals the total input power.

[0097] In some embodiments, the energy storage device 1 may have an output limiting power. The output limiting power can be the maximum rated output power that the energy storage device 1 can withstand. If the total output power exceeds the output limiting power, it means that the energy storage device 1 needs to output more power, which may cause the energy storage device 1 to lose power more quickly, thus affecting the charging efficiency of the energy storage device 1.

[0098] In some implementations, the second determination condition may be that the total output power is greater than the total input power, and the second difference between the total output power and the total input power may be greater than the output limit power. After determining that the total output power is greater than the total input power, the second difference between the total output power and the total input power is calculated. This second difference is the portion of the output power that needs to be converted into energy within the energy storage device 1. The second difference may also be the absolute value of the difference between the total input power and the total output power.

[0099] As an example, the total output power of the energy storage device 1 can be 720W, and the total input power of the energy storage device 1 can be 710W. Then the total output power is greater than the total input power, and the second difference between the total output power and the total input power is 720W-710W=10W.

[0100] Therefore, when the total output power of the energy storage device 1 is greater than the total input power, the total output power can be adjusted according to the output limit power of the energy storage device 1 and the second difference, so as to reduce the total output power of the energy storage device 1 to the range of the output limit power.

[0101] In some implementation methods, reference may be made to Figure 3 as well as Figure 4 Step S300 may include step S330:

[0102] S321: In response to the second difference being greater than the output limit power, the input power of at least one output interface is reduced to reduce the total output power.

[0103] When the second difference is greater than the output limit power, it indicates that the output power of the energy storage device 1 that needs to convert energy and transfer it to the external electronic device exceeds the output limit power of the energy storage device 1. This means the energy storage device 1 will soon experience insufficient input power and rapid power loss, which will also lead to insufficient subsequent output power or damage to the energy storage device 1. Therefore, the total output power can be reduced so that the second difference is less than or equal to the output limit power, thereby slowing down the power loss rate of the energy storage device 1 and reducing the excessively rapid power loss during simultaneous charging and discharging, thus improving the charging efficiency of the energy storage device 1.

[0104] In some implementations, step S330 may include step S331:

[0105] S330: The output power of multiple output interfaces is reduced sequentially according to the second preset order until the difference between the current total output power and the current total input power no longer meets the second judgment condition.

[0106] The second preset order can be set in advance according to the number and type of output interfaces 120 and the user's needs, or it can be randomly generated, etc.

[0107] Specifically, when reducing the total output power, the output power of each output interface 120 can be reduced sequentially according to a second preset order. After the output power of each output interface 120 is reduced, the difference between the current total output power and the current total input power is compared with a second judgment condition to determine whether the current second difference satisfies the second judgment condition. If the current second difference satisfies the second judgment condition, the output power of the next output interface 120 is then reduced. This process continues until the second judgment condition is no longer satisfied.

[0108] After the input power of each output interface 120 is reduced, if the current second difference still satisfies the second judgment condition, the input power of multiple output interfaces 120 is reduced sequentially according to the second preset order until the difference between the current total output power and the current total input power no longer satisfies the second judgment condition.

[0109] For example, in some implementations, such as Figure 4 As shown, the energy storage device 1 includes four output interfaces 120, namely P5, P6, P7, and P8. All interfaces P5, P6, P7, and P8 have power outputs. The total input power and total output power are obtained, and a second difference is calculated. When the second difference satisfies a second judgment condition, the output power of each interface is reduced sequentially according to a second preset order. For example, the output power of P5 is reduced, while the output power of P6, P7, and P8 remains unchanged. The current total input power and current total output power are then obtained, and the current second difference is calculated. When the current second difference satisfies the second judgment condition, the output power of P6 is reduced, while the output power of P5, P7, and P8 remains unchanged. The current total input power and current total output power are then obtained, and the current second difference is calculated. This process continues. After the output power of one output interface 120 is reduced, it is determined whether the current second difference satisfies the second judgment condition. If it does, the input power of the next output interface 120 is reduced according to the second preset order. If the difference between the current total input power and the current total output power no longer meets the second judgment condition, then the output power of each output interface 120 remains unchanged.

[0110] By setting the input power of the output interface 120 to be reduced one by one in the second preset order, the reduction of the total output power can be more precise. When the second difference is reduced to less than the output limit power, the discharge efficiency and speed of the energy storage device 1 can still be guaranteed.

[0111] In some other embodiments, step S330 may include step S332:

[0112] S332: Synchronously reduce the output power of each output interface once or multiple times until the difference between the current total output power and the current total input power no longer meets the second judgment condition.

[0113] In some implementations, the total output power can be reduced by simultaneously reducing the input power of each output interface 120.

[0114] Specifically, when it is determined that the current second difference is greater than the input limit power, the output power of each output interface 120 is reduced, and then the total output power and the second difference are recalculated, and it is determined whether the current second difference is greater than the output limit power. If the current second difference is still greater than the output limit power, the output power of each output interface 120 is reduced again until the current second difference is less than or equal to the output limit power.

[0115] For example, in some embodiments, the energy storage device 1 may include four output interfaces 120, all of which have power output. The total output power and total input power are further obtained, and a second difference is calculated. If the second difference is greater than the output power limit, the output power of the four output interfaces 120 is simultaneously reduced. Then, the current total output power and the second difference are recalculated, and it is determined whether the current second difference is greater than the output power limit. If the second difference is still greater than the output power limit, the output power of the four output interfaces 120 is reduced again until the current second difference is less than or equal to the output power limit.

[0116] By setting up a synchronous reduction of 120 for each output interface, the adjustment speed of the total output power can be improved. The current second difference can be reduced in a short time, so that the difference between the current total output power and the current total input power no longer meets the second judgment condition. It can also simplify the process of reducing the total output power.

[0117] In some embodiments, when reducing the output power of each output interface 120, the reduction can be based on a preset fixed value, which can be pre-set. Alternatively, in other embodiments, the input power of each output interface 120 can be reduced proportionally according to the ratio of the output power corresponding to each output interface 120. Other methods can also be used to adjust the input power of each output interface 120, which will not be specifically listed here.

[0118] S340: In response to the second difference being less than or equal to the output limit power, the total output power remains unchanged.

[0119] In some implementations, when the second difference is less than or equal to the output limit power, it indicates that the input power of the energy storage device 1 is within a safe range, and therefore the input power of the output interface 120 can be kept constant.

[0120] In summary, when the energy storage device 1 of this application has power input at at least one input interface 110 and power output at at least one output interface 120, it can obtain the total input power of the input interface 110 with power input and the total output power of the output interface 120 with power output, and determine whether the difference between the total input power and the total output power satisfies the first and second judgment conditions in the power judgment conditions. If they are satisfied, the total input power or the total output power is adjusted. Therefore, this application can simultaneously consider the total input power and the total output power of the energy storage device 1, and adjust the output and input conditions of the energy storage device 1 according to the total input power of the input interface 110, the total output power of the output interface 120, and the preset power judgment conditions, so as to regulate the situation of slow charging or fast power loss of the energy storage device 1, thereby improving the charging and discharging efficiency.

[0121] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A charge-discharge power control method for an energy storage device, characterized by, The energy storage device includes multiple input interfaces and multiple output interfaces, and the method includes: Within a preset period, in response to the presence of at least one power input at the plurality of input interfaces and at least one power output at the plurality of output interfaces, the total input power of all the input interfaces with power input is obtained, and the total output power of all the output interfaces with power output is obtained. Based on the total input power, the total output power, and the preset power judgment conditions, determine whether to perform power adjustment; When the difference between the total input power and the total output power satisfies the first judgment condition in the power judgment condition, the total input power corresponding to the plurality of input interfaces is adjusted; or, when the difference between the total input power and the total output power satisfies the second judgment condition in the power judgment condition, the total output power corresponding to the plurality of output interfaces is adjusted.

2. The method of claim 1, wherein, The energy storage device has an input power limit; the first determination condition is that the total input power is greater than the total output power, and the first difference between the total input power and the total output power is greater than the input power limit.

3. The method of claim 2, wherein, When the difference between the total input power and the total output power satisfies the first judgment condition in the power judgment condition, adjusting the total input power corresponding to the plurality of input interfaces includes: In response to the first difference being greater than the input power limit, the input power of at least one of the input interfaces is reduced to reduce the total input power.

4. The method of claim 3, wherein, The step of reducing the input power of at least one of the input interfaces to reduce the total input power in response to the first difference being greater than the input limit power includes: The input power of the plurality of input interfaces is reduced sequentially according to a first preset order until the difference between the current total input power and the current total output power no longer satisfies the first judgment condition.

5. The method of claim 3, wherein, The step of reducing the input power of at least one of the input interfaces to reduce the total input power in response to the first difference being greater than the input limit power includes: The input power of each input interface is reduced one or more times in a synchronized manner until the difference between the current total input power and the current total output power no longer satisfies the first judgment condition.

6. The method of claim 1, wherein, The energy storage device has an output limiting power; the second judgment condition is that the total output power is greater than the total input power, and the second difference between the total output power and the total input power is greater than the output limiting power.

7. The method of claim 6, wherein, When the difference between the total input power and the total output power satisfies the second judgment condition in the power judgment condition, adjusting the total output power corresponding to the plurality of output interfaces includes: In response to the second difference being greater than the output power limit, the output power of at least one of the output interfaces is reduced to reduce the total output power.

8. The method of claim 7, wherein, The response that the second difference is greater than the output power limit, reducing the output power of at least one of the output interfaces to reduce the total output power, includes: The output power of the plurality of output interfaces is reduced sequentially according to the second preset order until the difference between the current total output power and the current total input power no longer satisfies the second judgment condition.

9. The method of claim 7, wherein, The response that the second difference is greater than the output power limit, reducing the output power of at least one of the output interfaces to reduce the total output power, includes: The output power of each output interface is reduced one or more times in a synchronized manner until the difference between the current total output power and the current total input power no longer satisfies the second judgment condition.

10. The method of claim 1, wherein, Obtaining the total input power of all the input interfaces with power input includes: Power input is detected for multiple input interfaces, and the external input power of the input interface with power input is obtained; Compare the external input power corresponding to each input interface with the maximum input power corresponding to that input interface; In response to an external input power exceeding its corresponding maximum input power, the input power of the corresponding input interface is adjusted to the corresponding maximum input power; or, In response to an external input power being less than or equal to its corresponding maximum input power, the input power of the corresponding input interface is maintained at the corresponding external input power; The total input power is obtained by summing the input power of the multiple input interfaces.

11. The method of claim 1, wherein, The total output power obtained from all the output interfaces having power output includes: Power output is detected for multiple output interfaces, and the external output power of the output interface that has power output is obtained; Compare the external output power corresponding to each output interface with the maximum output power of that output interface; In response to an external output power being equal to or greater than its corresponding maximum output power, the output power of the corresponding output interface is adjusted to the corresponding maximum output power; or, In response to an external output power being less than its corresponding maximum output power, the input power of the corresponding output interface is maintained at the corresponding external output power; The total output power is obtained by summing the output power of the multiple output interfaces.

12. The method according to claim 1, characterized in that, The plurality of input interfaces include multiple input types, and the input type includes at least one of AC power input, DC power input, photovoltaic input, or fast charging protocol input; or, the plurality of output interfaces include multiple output types, and the output type includes at least one of AC power output, DC power output, photovoltaic output, or fast charging protocol output.

13. An energy storage device, characterized in that, include: Multiple input interfaces Multiple output interfaces The processing circuit is electrically connected to the plurality of input interfaces and the plurality of output interfaces respectively; The processing circuit is used to execute the charging and discharging power control method as described in any one of claims 1-12.

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