Power superposition output method and device, and storage medium

Abstract

The invention relates to the field of power loads, and discloses a power superposition output method and device and a storage medium. The method comprises the following steps: the MCU control module judges whether the load power of the DC output module is greater than the output power of the ACDC module; when the output power is larger than the output power of the ACDC module, the battery state of the BMS management module is read; judging whether the battery state meets a preset qualified condition or not; when the preset qualified condition is met, the power parallel module is controlled to access the output power of the DCDC module; and the power parallel connection module is used for connecting the output power of the DCDC module and the output power of the ACDC module with the load power of the DC output module in parallel. In the embodiment of the invention, the charging and storage integrated equipment can use the energy storage battery to supply power to the load together under the condition of the alternating current output mode.

Description

Technical Field

[0001] This invention relates to the field of power loads, and more particularly to a power superposition output method, device, and storage medium. Background Technology

[0002] Multi-power supply technology, as a key means to improve system reliability and continuous operation capability, has wide applications in communication equipment, data centers, industrial control, and new energy vehicles. Traditional power supply solutions often rely on a single power source, and a power source failure can lead to system paralysis, making it difficult to meet the requirements of high reliability scenarios. To address this, various multi-power supply architectures have been developed to achieve power redundancy, load balancing, or energy optimization.

[0003] Modern multi-power supply systems often employ MOSFET-based active switching circuits in conjunction with controllers to achieve seamless switching. Simultaneously, digital power management technology is widely used, dynamically adjusting power supply strategies by monitoring the status of each power source, load demand, and battery capacity in real time. Existing technologies offer two power supply solutions. The first is redundancy backup, using logic circuits to switch between multiple power sources, ensuring the system is powered by the source with the highest voltage. The second is series superposition, connecting the outputs of multiple power sources in series to achieve voltage superposition and obtain a higher output voltage, typically used in specialized fields such as power testing equipment. Current integrated charging and storage devices generally employ a "two-choice" operating logic, where the output power in AC mode is entirely limited by the rated power of its built-in ACDC module. Therefore, a new technology is needed to address the technical problem of integrated charging and storage devices being unable to utilize internal batteries for auxiliary power supply in AC output mode. Summary of the Invention

[0004] The main objective of this invention is to solve the problem that integrated charging and storage devices cannot utilize internal battery auxiliary power supply technology in AC output mode.

[0005] The first aspect of this invention provides a power superposition output method, which is applied to a power superposition output system. The power superposition output system includes: an MCU control module, an ACDC module, a BMS management module, a DCDC module, a power parallel module, and a DC output module. The power parallel module is connected to the ACDC module, the MCU control module, the DCDC module, and the DC output module, respectively. The BMS management module is connected to the MCU control module and the DCDC module, respectively. The BMS management module is used to connect to a battery pack and collect the battery status of the battery pack. The power superposition output method includes: The MCU control module determines whether the load power of the DC output module is greater than the output power of the ACDC module; When the output power is greater than that of the ACDC module, the battery status of the BMS management module is read. Determine whether the battery status meets the preset qualification conditions; When the preset qualification conditions are met, the output power of the power parallel module connected to the DC-DC module is controlled. The power parallel module connects the output power of the DC output module in parallel with the output power of the DC-DC module and the output power of the AC-DC module to bear the load power of the DC output module.

[0006] Optionally, in a first implementation of the first aspect of the present invention, after the step of the power parallel module parallelly bearing the load power of the DC output module with the output power of the DC-DC module and the output power of the AC-DC module, the method further includes: The MCU control module monitors the parallel battery status of the BMS management module; Determine whether the parallel connection state of the batteries meets the preset qualification conditions; If the battery parallel connection state does not meet the preset qualified conditions, the power parallel connection module is controlled to disconnect the output power of the DC-DC module.

[0007] Optionally, in a second implementation of the first aspect of the present invention, the battery state includes: SOC (State of Charge), SOH (State of Hypoxia), and battery temperature, and the step of determining whether the battery state meets the preset qualification conditions includes: Determine whether the SOC power is greater than a preset capacity threshold; If the battery status is not greater than the preset capacity threshold, then it is confirmed that the battery status does not meet the preset qualification conditions. When the SOH value is greater than a preset capacity threshold, it is determined whether the SOH value is greater than a preset health threshold. If the battery status is not greater than a preset health threshold, then the battery status is confirmed to not meet the preset qualification conditions. When the temperature exceeds a preset health threshold, it is determined whether the battery temperature is below a preset abnormal threshold. If the battery status is not less than the preset abnormal threshold, it is confirmed that the battery status does not meet the preset qualified conditions. When the value is less than the preset abnormal threshold, the battery status is confirmed to meet the preset qualified conditions.

[0008] Optionally, in a third implementation of the first aspect of the present invention, the MCU control module includes an AT-SAMD10 chip.

[0009] Optionally, in a fourth implementation of the first aspect of the present invention, the power parallel module includes: a first MOSFET, a second MOSFET, a third MOSFET, and a fourth MOSFET. The gates of the first MOSFET and the second MOSFET are respectively connected to an MCU control module. The gates of the third MOSFET and the fourth MOSFET are respectively connected to an MCU control module. The source of the first MOSFET is connected to the source of the second MOSFET. The source of the third MOSFET is connected to the source of the fourth MOSFET. The drains of the first MOSFET and the third MOSFET are connected. The drain of the second MOSFET is connected to the DC-DC module. The drain of the fourth MOSFET is connected to the AC-DC module.

[0010] Optionally, in a fifth implementation of the first aspect of the present invention, the MCU control module is connected to the BMS management module via an I2C interface, the MCU control module is connected to the drain of the fourth MOS transistor via the AC_PD pin so that the ADC can sample the output voltage of the ACDC module, and the MCU control module is connected to the drain of the second MOS transistor via the AD_PD pin so that the ADC can sample the output voltage of the DCDC module.

[0011] Optionally, in a sixth implementation of the first aspect of the present invention, before controlling the output power of the power parallel module connected to the DC-DC module, the method further includes: The MCU control module samples the output voltage of the AC-CDC module through the AC_PD pin to obtain a first voltage, and samples the output voltage of the DC-CDC module through the AD_PD pin to obtain a second voltage; Determine whether the difference between the first voltage and the second voltage is less than a preset matching threshold; When the voltage difference between the first voltage and the second voltage is not less than the preset matching threshold, the BMS management module is controlled via the I2C interface to adjust the output voltage of the DC-DC module until the difference between the first voltage and the second voltage is less than the preset matching threshold.

[0012] Optionally, in a seventh implementation of the first aspect of the present invention, before the step of the MCU control module determining whether the load power of the DC output module is greater than the output power of the ACDC module, the method further includes: The MCU control module determines whether the AC-CDC module has an output voltage through the AC_PD pin; When there is no output voltage, the output voltage of the AC-CDC module is continuously monitored through the AC_PD pin; When an output voltage is present, the output power of the ACDC module is detected.

[0013] A second aspect of the present invention provides a power superposition output device, comprising: a memory and at least one processor, wherein the memory stores instructions, and the memory and the at least one processor are interconnected via a circuit; the at least one processor invokes the instructions in the memory to cause the power superposition output device to perform the power superposition output method described above.

[0014] A third aspect of the present invention provides a computer-readable storage medium storing instructions that, when executed on a computer, cause the computer to perform the above-described power superposition output method.

[0015] In this embodiment of the invention, the DC and AC power outputs are connected in parallel through circuit framework design. When the AC power output is insufficient to meet the load power, the state of the energy storage battery is analyzed first. When the energy storage battery state meets the pre-set qualification conditions, the BMS management system is controlled to combine the DC and AC power to provide power to the external load. This significantly increases the peak output power in AC mode without significantly increasing the size and weight of the integrated charging and storage device. This enables the integrated charging and storage device to call on the energy storage battery to jointly power the load in AC output mode, solving the problem that the integrated charging and storage device cannot use the internal battery to assist in power supply in AC output mode. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of one embodiment of the power superposition output method in this invention; Figure 2 This is a schematic diagram of one embodiment of the power superposition output system in this invention; Figure 3 This is a schematic diagram of the component connection embodiment of the power superposition output system in this invention; Figure 4 This is a schematic diagram of a specific embodiment preceding step 104 of the power superposition output method in this invention. Figure 5 This is a schematic diagram of one embodiment of the power superposition output device in the present invention. Detailed Implementation

[0017] This invention provides a power superposition output method, device, and storage medium.

[0018] The embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While some embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the present disclosure. It should be understood that the accompanying drawings and embodiments are for illustrative purposes only and are not intended to limit the scope of protection of the present invention.

[0019] In the description of the embodiments disclosed in this invention, the term "comprising" and similar terms should be understood as open-ended inclusion, i.e., "including but not limited to". The term "based on" should be understood as "at least partially based on". The term "one embodiment" or "the embodiment" should be understood as "at least one embodiment". The terms "first", "second", etc., may refer to different or the same objects. Other explicit and implicit definitions may also be included below.

[0020] For ease of understanding, the specific process of the embodiments of the present invention is described below. Please refer to [link / reference]. Figure 1 and Figure 2 A schematic diagram of an embodiment of the power superposition output method in this invention is shown. The power superposition output method is applied to a power superposition output system.

[0021] The power superposition output system includes: an MCU control module 201, an ACDC module 202, a BMS management module 203, a DCDC module 204, a power parallel module 205, and a DC output module 206. The power parallel module 205 is connected to the ACDC module 202, the MCU control module 201, the DCDC module 204, and the DC output module 206, respectively. The BMS management module 203 is connected to the MCU control module 201 and the DCDC module 204, respectively. The BMS management module 203 is used to connect to the battery pack and collect the battery status of the battery pack.

[0022] The AC-DC module 202 is used to receive AC input and convert it into DC power, for example, converting 220V AC power into 20V DC power.

[0023] The DC-DC module 204 is used to receive the battery voltage transmitted by the BMS management module 203 and boost it to a set DC voltage, such as boosting the 12V battery voltage transmitted by the BMS management module 203 to 20V DC.

[0024] The power superposition output method includes: 101. The MCU control module determines whether the load power of the DC output module is greater than the output power of the ACDC module; In this embodiment, the MCU control module 201 connects to the DC output module, analyzes the difference between the load power of the DC output module 206 and the output power of the ACDC module 202, and determines whether the load power of the DC output module 206 is greater than the output power of the ACDC module 202.

[0025] 102. When the output power is greater than that of the ACDC module, the battery status of the BMS management module is read. In this embodiment, if the load power of the DC output module is 96 watts, while the output power of the ACDC module is only 68 watts, the MCU control module 201 will trigger the reading of the cell-related data connected to the battery pack in the BMS management module 205.

[0026] 103. Determine whether the battery status meets the preset qualification conditions; In this embodiment, the battery status, such as SOC (State of Charge), SOH (State of Health), and battery temperature, are analyzed to determine whether they meet the set qualification conditions.

[0027] Specifically, the battery status includes: SOC (State of Charge), SOH (State of Hypoxia), and battery temperature. Step 103 includes the following specific implementation methods: 1031. Determine whether the SOC power is greater than a preset capacity threshold; 1032. If the battery status is not greater than the preset capacity threshold, it is confirmed that the battery status does not meet the preset qualification conditions. 1033. When the SOH value is greater than the preset capacity threshold, determine whether the SOH value is greater than the preset health threshold. 1034. If the battery status is not greater than the preset health threshold, then it is confirmed that the battery status does not meet the preset qualification conditions. 1035. When the temperature exceeds a preset health threshold, determine whether the battery temperature is below a preset abnormal threshold. 1036. If the battery status is not less than the preset abnormal threshold, it is confirmed that the battery status does not meet the preset qualified conditions. 1037. When the value is less than the preset abnormal threshold, the battery status is confirmed to meet the preset qualified conditions.

[0028] In steps 1031-1037, the battery's SOC (State of Charge) is checked against a capacity threshold of 10%. If the SOC is below 10%, the battery is considered to have failed the preset qualification criteria. If the SOC is above 10%, the battery's SOH (State of Health) is analyzed to see if it exceeds a preset health threshold. If it does, the battery is considered "healthy," and if it does not, it is considered "unhealthy" and fails to meet the preset qualification criteria.

[0029] If the SOC (State of Charge) and SOH (State of Health) values ​​both meet the requirements, then analyze whether the battery temperature is below the abnormal threshold of 60 degrees Celsius. If it is below the abnormal threshold of 60 degrees Celsius, then the battery condition is confirmed to meet the preset qualification conditions; otherwise, it is confirmed that the qualification conditions are not met.

[0030] 104. When the preset qualification conditions are met, control the output power of the power parallel module connected to the DC-DC module; In this embodiment, after the qualification conditions are met, the MCU control module 201 controls the power parallel module 205 to connect to the output power of the DC-DC module 204.

[0031] 105. The power parallel module is connected in parallel with the output power of the DC-DC module and the output power of the AC-DC module to bear the load power of the DC output module.

[0032] In this embodiment, the power parallel module 205 connects the output power of the DC-DC module 204 and the output power of the AC-DC module 202 in parallel to jointly bear the load power of the DC output module 206.

[0033] The following is a description of the application scenarios of this invention: Scenario 1: Mobile work, charging a high-performance laptop A designer was using a laptop (requiring 96W of power) for video rendering in a coffee shop, but only brought a regular 65W charging and storage device. In AC mode, the device's power was insufficient, causing the laptop to lose power while charging and even making it unable to perform high-load tasks.

[0034] When the MCU control module 201 detects that the laptop requires 96W of power, it automatically activates the dual-drive mode. The ACDC module 202 provides 65W, while the battery provides 31W through the DCDC module 204, for a total output of 96W, meeting the laptop's full-speed operation needs. Users no longer need to carry a bulky 100W charger; a lightweight 65W charging and storage device can meet the charging needs of high-performance laptops, truly enabling lightweight operation and efficient work.

[0035] Scenario 2: Emergency power supply to deal with sudden power outages An engineer was performing critical data compilation work on their laptop when a sudden power outage in the office interrupted the compilation, resulting in data loss. In the instant the AC power failed (<10ms), the MCU control module 201 immediately detected the disappearance of AC voltage and seamlessly switched to DC power, with the battery providing uninterrupted power to the laptop. The device instantly transformed from a "charger" into a "UPS (Uninterruptible Power Supply)." This provided the user with uninterrupted power protection, preventing data loss or work interruption due to sudden power outages, and improving work reliability and safety.

[0036] Scenario 3: Quickly replenish power to charge multiple devices A traveler in a hotel has only one outlet and needs to charge both his laptop (65W) and phone (20W) simultaneously, requiring a total power output of 85W. A standard 65W charger cannot meet the maximum charging speed of both devices at the same time. The solution is to activate dual-drive mode: the AC adapter provides 65W for the laptop, and the battery provides 20W for the phone, for a total output of 85W, allowing both devices to enjoy fast charging simultaneously. One device, one outlet, solving all charging anxieties. Users no longer need to wait in line; all devices can be fully charged in the shortest possible time, greatly improving charging efficiency and convenience.

[0037] This invention utilizes the innovative "dual-drive mode" technology to intelligently transform a standard 65W charging and storage device into a 100W high-power charger, a reliable UPS, and a multi-port fast charging station when needed. This greatly expands the product's functional boundaries and enhances the user experience in various scenarios without increasing the user's carrying burden.

[0038] Furthermore, following step 105, the following specific implementation methods are also included: 1051. The MCU control module monitors the parallel connection status of the battery in the BMS management module; 1052. Determine whether the parallel connection state of the batteries meets the preset qualification conditions; 1053. When the parallel connection state of the battery does not meet the preset qualified conditions, the power parallel connection module is controlled to disconnect the output power of the DC-DC module.

[0039] In steps 1051-1053, the MCU control module 201 continuously monitors the battery parallel status uploaded by the BMS management module 203 when the battery pack is connected in parallel.

[0040] The system determines whether the parallel connection of the battery meets the preset qualification conditions. If the parallel connection of the battery does not meet the preset qualification conditions, the control power parallel module 205 disconnects the output power of the DC-DC module 204, and the system switches to the single power load of the DC output module 206 carried by the ACDC module 202.

[0041] In another specific embodiment, please refer to Figure 3 , Figure 3 This is a schematic diagram of the component connection embodiment of the power superposition output system in this invention.

[0042] The MCU control module 201 includes an AT-SAMD10 chip. The AT-SAMD10 chip is a 32-bit ARM microcontroller manufactured by Microchip Technology. Based on its wide voltage and low power consumption characteristics, the AT-SAMD10 chip is used in multi-power supply scenarios.

[0043] The power parallel module 205 includes: a first MOSFET Q1, a second MOSFET Q2, a third MOSFET Q3, and a fourth MOSFET Q4, all of which are N-channel MOSFETs.

[0044] The gates of the first MOSFET Q1 and the second MOSFET Q2 are connected to the DC_EN pin (pin 22) of the MCU control module 201, respectively. The gates of the third MOSFET Q3 and the fourth MOSFET Q4 are connected to the AC_EN pin (pin 21) of the MCU control module 201, respectively. The source of the first MOSFET Q1 is connected to the source of the second MOSFET Q2, forming a bidirectional electronic switch. The source of the third MOSFET Q3 is connected to the source of the fourth MOSFET Q4, forming another bidirectional electronic switch. The drains of the first MOSFET Q1 and the third MOSFET Q3 are connected, allowing the DC load and the AC load to be connected in parallel.

[0045] The drain of the second MOSFET Q2 is connected to the output terminal DC_POWER of the DC-DC module 204, and the drain of the fourth MOSFET Q4 is connected to the output terminal AC_POWER of the AC-DC module 202.

[0046] The MCU control module 201 is connected to the BMS management module 203 via the BMS-SDA pin (PA10 pin) and BMS-SCL pin (PA11 pin) of the I2C interface. The MCU control module 201 is connected to the drain of the fourth MOSFET Q4 through the AC_PD pin (PA06 pin) to the AC_P node so that the ADC can sample the output voltage of the ACCDC module 202. The MCU control module 201 is connected to the drain of the second MOSFET Q2 through the AD_PD pin (PA07 pin) to the DC_P node so that the ADC can sample the output voltage of the DCCDC module 204.

[0047] For specific details regarding the above structure, please refer to [link / reference]. Figure 4 , Figure 4 This is a schematic diagram of a specific embodiment prior to step 104 of the power superposition output method in this invention. The following specific implementation methods are also included before step 104: 1041. The MCU control module samples the output voltage of the AC-CDC module through the AC_PD pin to obtain a first voltage, and samples the output voltage of the DC-CDC module through the AD_PD pin to obtain a second voltage; 1042. Determine whether the difference between the first voltage and the second voltage is less than a preset matching threshold; 1043. When the voltage difference between the first voltage and the second voltage is not less than the preset matching threshold, the BMS management module is controlled via the I2C interface to adjust the output voltage of the DC-DC module until the difference between the first voltage and the second voltage is less than the preset matching threshold.

[0048] In steps 1041-1043, the MCU control module 201 samples the output voltage of the AC-CDC module 202 at the AC-P node ADC via the AC_PD pin (PA06 pin) to obtain the first voltage. The MCU control module 201 then samples the output voltage of the DC-CDC module 204 at the DC-P node ADC via the AD_PD pin (PA07 pin) to obtain the second voltage.

[0049] If the voltages at the AC and DC terminals are mismatched, the following serious problems will occur: 1. Huge circulating current: Assuming the DC voltage is 500mV higher than the AC voltage, with a total circuit resistance of 10mΩ, the circulating current will reach 50A, far exceeding the normal operating current, which will cause the MOSFET or power module to burn out.

[0050] 2. Uneven power distribution: The high voltage path will output excessive current, which may trigger overcurrent protection; the low voltage path will output insufficient current, or even absorb power in reverse.

[0051] 3. Low efficiency: The circulating current generates a large amount of heat loss in the loop resistance, which greatly reduces the system efficiency.

[0052] Therefore, accurate voltage matching is a prerequisite for achieving stable parallel connection. It is necessary to determine whether the difference between the first voltage and the second voltage is less than the matching threshold of 50mV.

[0053] If the matching threshold is not less than 50mV, then the MCU control module 201 needs to control the BMS management module 203 through the I2C interface to adjust the output voltage of the DC-DC module 204 until the difference between the first voltage and the second voltage is less than the preset matching threshold of 50mV.

[0054] Furthermore, in the specific structure described above, the following specific implementation method is included before step 101: 1011. The MCU control module determines whether the AC-CDC module has an output voltage through the AC_PD pin; 1012. When there is no output voltage, the output voltage of the AC-CDC module is continuously monitored through the AC_PD pin; 1013. When an output voltage is present, the output power of the ACDC module is detected.

[0055] In steps 1011-1013, the MCU control module 201 determines whether the AC-CDC module 202 has an output voltage via the AC_PD pin (PA06 pin), which means analyzing whether AC power is connected. If AC power is not connected, the MCU continuously monitors the output voltage of the AC-CDC module 202 via the AC_PD pin (PA06 pin). When the AC-CDC module 202 has an output voltage, the output power of the AC-CDC module 202 needs to be detected in order to proceed to the power comparison in step 101.

[0056] In this embodiment of the invention, the DC and AC power outputs are connected in parallel through circuit framework design. When the AC power output is insufficient to meet the load power, the state of the energy storage battery is analyzed first. When the energy storage battery state meets the pre-set qualification conditions, the BMS management system is controlled to combine the DC and AC power to provide power to the external load. This significantly increases the peak output power in AC mode without significantly increasing the size and weight of the integrated charging and storage device. This enables the integrated charging and storage device to call on the energy storage battery to jointly power the load in AC output mode, solving the problem that the integrated charging and storage device cannot use the internal battery to assist in power supply in AC output mode.

[0057] Figure 5 This is a schematic diagram of a power superimposed output device 500 provided in an embodiment of the present invention. The power superimposed output device 500 can vary significantly due to different configurations or performance characteristics. It may include one or more central processing units (CPUs) 510 and memory 520, and one or more storage media 530 storing application programs 533 or data 532. The memory 520 and storage media 530 can be temporary or persistent storage. The program stored in the storage media 530 may include one or more modules (not shown in the diagram), each module including a series of instruction operations on the power superimposed output device 500. Furthermore, the processor 510 may be configured to communicate with the storage media 530 and execute the series of instruction operations in the storage media 530 on the power superimposed output device 500.

[0058] The power-aggregated output device 500 may also include one or more power supplies 540, one or more wired or wireless network interfaces 550, one or more input / output interfaces 560, and / or one or more operating systems 531, such as Windows Server, Mac OS X, Unix, Linux, Free BSD, etc. Those skilled in the art will understand that... Figure 5 The illustrated power superposition output device structure does not constitute a limitation on power superposition-based output devices, and may include more or fewer components than illustrated, or combine certain components, or have different component arrangements.

[0059] The present invention also provides a computer-readable storage medium, which may be a non-volatile computer-readable storage medium or a volatile computer-readable storage medium, wherein the computer-readable storage medium stores instructions that, when the instructions are executed on a computer, cause the computer to perform the steps of the power superposition output method.

[0060] In the context of this disclosure, a machine-readable medium can be a tangible medium that may contain or store a program for use by or in conjunction with an instruction execution system, apparatus, or device. A machine-readable medium can be a machine-readable signal medium or a machine-readable storage medium. Machine-readable media can be, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination of the foregoing. More specific examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the foregoing.

[0061] Furthermore, although the operations are described in a specific order, this should be understood as requiring that such operations be performed in the specific order shown or in sequential order, or requiring that all illustrated operations be performed to achieve the desired result. In certain environments, multitasking and parallel processing may be advantageous. Similarly, although several specific implementation details are included in the above discussion, these should not be construed as limiting the scope of this disclosure. Certain features described in the context of individual embodiments may also be implemented in combination in a single implementation. Conversely, various features described in the context of a single implementation may also be implemented individually or in any suitable sub-combination in multiple implementations.

[0062] Although the subject matter has been described using language specific to structural features and / or methodological logic, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or actions described above. Rather, the specific features and actions described above are merely illustrative examples of implementing the claims.

Claims

1. A power superposition output method, characterized in that, The power superposition output method is applied to a power superposition output system, which includes: an MCU control module, an ACDC module, a BMS management module, a DCDC module, a power parallel module, and a DC output module. The power parallel module is connected to the ACDC module, the MCU control module, the DCDC module, and the DC output module, respectively. The BMS management module is connected to the MCU control module and the DCDC module, respectively. The BMS management module is used to connect to the battery pack and collect the battery status of the battery pack. The power superposition output method includes: The MCU control module determines whether the load power of the DC output module is greater than the output power of the ACDC module; When the output power is greater than that of the ACDC module, the battery status of the BMS management module is read. Determine whether the battery status meets the preset qualification conditions; When the preset qualification conditions are met, the output power of the power parallel module connected to the DC-DC module is controlled. The power parallel module connects the output power of the DC output module in parallel with the output power of the DC-DC module and the output power of the AC-DC module to bear the load power of the DC output module.

2. The power superposition output method according to claim 1, characterized in that, After the step of the power parallel module connecting the output power of the DC output module and the output power of the ACDC module in parallel to bear the load power of the DC output module, the method further includes: The MCU control module monitors the parallel battery status of the BMS management module; Determine whether the parallel connection state of the batteries meets the preset qualification conditions; If the battery parallel connection state does not meet the preset qualified conditions, the power parallel connection module is controlled to disconnect the output power of the DC-DC module.

3. The power superposition output method according to claim 1, characterized in that, The battery status includes: SOC (State of Charge), SOH (State of Hypoxia) value, and battery temperature. The step of determining whether the battery status meets the preset qualification conditions includes: Determine whether the SOC power is greater than a preset capacity threshold; If the battery status is not greater than the preset capacity threshold, then it is confirmed that the battery status does not meet the preset qualification conditions. When the SOH value is greater than a preset capacity threshold, it is determined whether the SOH value is greater than a preset health threshold. If the battery status is not greater than a preset health threshold, then the battery status is confirmed to not meet the preset qualification conditions. When the temperature exceeds a preset health threshold, it is determined whether the battery temperature is below a preset abnormal threshold. If the battery status is not less than the preset abnormal threshold, it is confirmed that the battery status does not meet the preset qualified conditions. When the value is less than the preset abnormal threshold, the battery status is confirmed to meet the preset qualified conditions.

4. The power superposition output method according to claim 1, characterized in that, The MCU control module includes an AT-SAMD10 chip.

5. The power superposition output method according to claim 4, characterized in that, The power parallel module includes: a first MOSFET, a second MOSFET, a third MOSFET, and a fourth MOSFET. The gates of the first MOSFET and the second MOSFET are respectively connected to the MCU control module. The gates of the third MOSFET and the fourth MOSFET are respectively connected to the MCU control module. The source of the first MOSFET is connected to the source of the second MOSFET. The source of the third MOSFET is connected to the source of the fourth MOSFET. The drains of the first MOSFET and the third MOSFET are connected. The drain of the second MOSFET is connected to the DC-DC module. The drain of the fourth MOSFET is connected to the AC-DC module.

6. The power superposition output method according to claim 5, characterized in that, The MCU control module is connected to the BMS management module via an I2C interface. The MCU control module is connected to the drain of the fourth MOSFET via the AC_PD pin so that the ADC can sample the output voltage of the ACDC module. The MCU control module is connected to the drain of the second MOSFET via the AD_PD pin so that the ADC can sample the output voltage of the DCDC module.

7. The power superposition output method according to claim 6, characterized in that, Before controlling the output power of the power parallel module connected to the DC-DC module, the method further includes: The MCU control module samples the output voltage of the AC-CDC module through the AC_PD pin to obtain a first voltage, and samples the output voltage of the DC-CDC module through the AD_PD pin to obtain a second voltage; Determine whether the difference between the first voltage and the second voltage is less than a preset matching threshold; When the voltage difference between the first voltage and the second voltage is not less than the preset matching threshold, the BMS management module is controlled via the I2C interface to adjust the output voltage of the DC-DC module until the difference between the first voltage and the second voltage is less than the preset matching threshold.

8. The power superposition output method according to claim 6, characterized in that, Before the step of the MCU control module determining whether the load power of the DC output module is greater than the output power of the ACDC module, the method further includes: The MCU control module determines whether the AC-CDC module has an output voltage through the AC_PD pin; When there is no output voltage, the output voltage of the AC-CDC module is continuously monitored through the AC_PD pin; When an output voltage is present, the output power of the ACDC module is detected.

9. A power superposition output device, characterized in that, The power superposition output device includes: a memory and at least one processor, wherein the memory stores instructions, and the memory and the at least one processor are interconnected via a line; The at least one processor invokes the instructions in the memory to cause the power superimposed output device to perform the power superimposed output method as described in any one of claims 1-8.

10. A computer-readable storage medium storing a computer program thereon, characterized in that, When the computer program is executed by the processor, it implements the power superposition output method as described in any one of claims 1-8.

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