Power Management System and Method for Ultrasonic Equipment

Abstract

The present invention is applicable to the technical field of medical devices, and provides a power management system and method for an ultrasonic device, including a main control module, a charging selection module, a dynamic equalization module, a discharging selection module and a load; the inputs of the charging selection module and the discharging selection module are respectively connected to the adapter power supply and the battery bus power supply output by the dynamic equalization module, the output of the charging selection module is connected to the input of the dynamic equalization module, and the output of the discharging selection module is connected to the load discharging control module of the load; the dynamic equalization module includes multiple battery packs composed of multiple batteries connected in parallel, a charging equalization module and a discharging equalization module; the charging equalization module includes a charging control unit corresponding to each battery, and the discharging equalization module includes a discharging control unit, a power conversion unit and an equalization unit. The present invention solves the problems that the existing system cannot achieve discharging equalization and cannot self-equalize when there is no external adapter power supply connected.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to a power management system and method for an ultrasonic device. Background Art

[0002] As a high-power and high-precision medical device, an ultrasonic device is widely used in the diagnosis and treatment processes. It has relatively high requirements for the device's power supply system. Especially in desktop high-power ultrasonic devices, in order to ensure the stable operation of the device under high loads, a dual-power supply system is usually adopted, that is, the commercial power is converted into direct current for power supply through a power adapter, or automatically switched to battery PACK power supply when the commercial power is not connected.

[0003] However, in practical applications, the solution of single battery PACK power supply is limited by the battery capacity and discharge rate, and cannot meet the requirements of long endurance of high-power devices and high-power applications at the same time. For ultrasonic devices with relatively large power, if the capacity and discharge rate of a single battery are simply increased to improve the device performance, it will cause a significant increase in the battery volume, increasing the difficulty of the device's structural design. At the same time, if the energy of the battery PACK exceeds 100Wh, it will face the limitation that a dangerous goods packaging box (UN box) is required for air transportation during transportation, which brings inconvenience to the transportation of the device.

[0004] In order to improve the endurance and support high-power loads, multiple batteries are connected in parallel to provide sufficient power output. However, in practical applications, due to factors such as internal resistance and aging degree of the battery PACK, the problem of unbalanced charge and discharge often occurs, which in turn affects the endurance of the device and the service life of the battery. In addition, if the ultrasonic device is placed for a long time and not connected to alternating current, during the self-discharge process of the battery, due to the difference in battery internal resistance increasing with battery aging, this imbalance will cause the battery self-discharge to accelerate and the capacity to decrease, further affecting the service life of the battery.

[0005] In the prior art, a high-voltage bus power supply is usually used to provide a charging power supply for the battery pack, and a charging equalization circuit is used to achieve the balance between battery packs. That is, in the case of external adapter power supply, each battery pack can perform self-balancing adjustment through the bus voltage to ensure that the power of each battery pack is relatively balanced. However, the prior art has the following problems:

[0006] 1. The battery cannot achieve self-balancing without an external power supply, that is, when the adapter or external power supply is disconnected, the battery PACKs cannot perform self-balancing operations. At this time, due to the different power and internal resistance of each battery, some battery packs may be over-discharged during use, while other battery packs are not fully utilized. This will not only affect the operation stability of the device, but also accelerate the aging of some batteries.

[0007] 2. During the discharging process, battery equalization cannot be carried out. That is, in the existing solutions, battery equalization mainly occurs during the charging process. However, in the actual operation of the device, equalization is also required during the discharging stage. Due to the different charge and discharge efficiencies of each battery pack, the differences in internal resistance and capacity may lead to uneven current distribution during the discharging process, ultimately resulting in over-discharging of some batteries and under-utilization of some batteries, making it impossible to fully utilize the overall capacity of the batteries, thereby affecting the endurance and reliability of the device.

[0008] Based on the above problems, there are obvious deficiencies in the existing technology in terms of battery management, especially the lack of equalization adjustment during the battery discharging stage and the self-equalization ability without an external power supply, which severely restricts the performance of ultrasonic devices. Therefore, how to achieve self-equalization between battery PACKs without adapter power supply and how to effectively adjust the discharging equalization of the batteries during the discharging process have become technical problems to be solved. Summary of the Invention

[0009] Based on this, the object of the present invention is to provide a power management system and method for ultrasonic devices, so as to fundamentally solve the problems that the existing system cannot achieve discharging equalization and cannot self-equalize without external adapter power supply.

[0010] A power management system for ultrasonic devices according to an embodiment of the present invention includes a main control module, and a charging selection module, a dynamic equalization module, a discharging selection module, and a load, all of which are connected to the main control module.

[0011] The inputs of the charging selection module and the discharging selection module are respectively connected to the accessible adapter power supply and the battery bus power supply output by the dynamic equalization module. The output of the charging selection module is connected to the input of the dynamic equalization module, and the output of the discharging selection module is connected to the load discharging control module in the load.

[0012] The dynamic equalization module includes multiple battery packs composed of multiple batteries connected in parallel, a charging equalization module respectively connected to each battery input and the charging selection module, and a discharging equalization module respectively connected to each battery output and the discharging selection module.

[0013] The charging equalization module includes respective charging control units respectively connected to each battery input and the charging selection module. The discharging equalization module includes respective discharging control units respectively connected to each battery output, multiple power conversion units connected to respective discharging control units corresponding to each battery pack, and an equalization unit connected to each power conversion unit, wherein each battery pack is connected to a power conversion unit through its corresponding multiple discharging control units.

[0014] When the adapter power supply is not connected, the main control module is used to control the discharge control units corresponding to the batteries with a power level not lower than the set threshold range to discharge and the charging control units corresponding to the batteries with a power level lower than the set threshold range to charge according to the power levels of the collected batteries, until the power levels of all batteries are within the set threshold range.

[0015] Another object of an embodiment of the present invention is to provide a power management method for an ultrasonic device, which is applicable to the power management system for an ultrasonic device as described above. The method includes:

[0016] The main control module determines whether an adapter power supply is connected to the power management system;

[0017] If so, the main control module outputs a charging selection enable signal to the charging selection module, outputs a charging enable signal to the charging control units corresponding to all batteries, and outputs a discharge disable signal to the discharge control units corresponding to all batteries, so as to charge all batteries through the adapter power supply;

[0018] If not, the main control module determines whether the power levels of the individual batteries are within the set threshold range according to the power levels of the collected batteries;

[0019] If the power levels of all batteries are within the set threshold range, the main control module outputs a charging selection disable signal to the charging selection module and outputs a discharge enable signal to the discharge control units corresponding to all batteries, so as to discharge all batteries synchronously;

[0020] If there are batteries with power levels not within the set threshold range, the main control module outputs a charging selection enable signal to the charging selection module, outputs a discharge enable signal to the discharge control units corresponding to the batteries with a power level not lower than the set threshold range, and outputs a charging enable signal to the charging control units corresponding to the batteries with a power level lower than the set threshold range, so as to charge the batteries with a power level lower than the set threshold range through the battery bus power supply, and at the same time supply power to the battery bus power supply through the batteries with a power level not lower than the set threshold range, so that the power levels of all batteries reach the set threshold range.

[0021] In addition, according to the power management method for an ultrasonic device in the above embodiment of the present invention, the following additional technical features may also be included:

[0022] Further, the method further includes:

[0023] When the main control module receives a device startup signal or detects that an adapter power supply is connected, the main control module outputs a load discharge enable signal to the load discharge control module, so that the discharge bus power output by the discharge selection module supplies power to the load;

[0024] When the main control module receives the device shutdown signal and detects that the adapter power supply is not connected, the main control module outputs a load discharge disable signal to the load discharge control module to stop power supply to the load.

[0025] Further, the step of outputting a discharge enable signal to the discharge control unit corresponding to the battery with a power level not lower than the set threshold range includes:

[0026] The main control module determines the proportion of the number of batteries with a power level higher than the set threshold range based on the power levels of each battery, and determines whether it is greater than the first preset proportion;

[0027] If so, the main control module outputs a discharge enable signal to the discharge control unit corresponding to the battery with a power level higher than the set threshold range;

[0028] If not, the main control module outputs a discharge enable signal to the discharge control unit corresponding to the battery with a power level not lower than the set threshold range.

[0029] Further, the step of the main control module determining whether the power levels of each battery are within the set threshold range according to the collected power levels of each battery includes:

[0030] The main control module obtains the current power level of each battery, and calculates the initially set power threshold range based on the current power levels of each battery;

[0031] The main control module determines the proportion of the number of batteries with a power level not lower than the initially set power threshold range based on the power levels of each battery;

[0032] When the proportion of the number of batteries with a power level not lower than the initially set power threshold range is lower than the second preset proportion, the main control module dynamically adjusts the set threshold range until the proportion of the number of batteries within the set threshold range reaches or exceeds the second preset proportion;

[0033] The main control module determines whether the power levels of each battery are within the dynamically adjusted set threshold range according to the collected power levels of each battery.

[0034] Further, after the step of the main control module outputting a discharge enable signal to the discharge control unit corresponding to the battery with a power level higher than the set threshold range, it further includes:

[0035] The main control module monitors the power demand of the load, and determines whether the power output from the battery corresponding to the currently output discharge enable signal to the load meets the power demand of the load;

[0036] If not, the main control module outputs a discharge enable signal to the discharge control unit corresponding to other batteries.

[0037] Further, the step of the master control module outputting a discharge enable signal to the discharge control units corresponding to other batteries includes:

[0038] The master control module calculates the number of target batteries required to discharge according to the power demand of the load, and sorts all the batteries in descending order of power;

[0039] The master control module determines other target batteries to be discharged according to the calculated number of target batteries, the number of batteries with power higher than the set threshold range, and the sorted battery power order, and outputs a discharge enable signal to the discharge control units corresponding to the other target batteries.

[0040] Further, the step of outputting a discharge enable signal to the discharge control units corresponding to other target batteries includes:

[0041] The master control module determines whether the other target batteries include batteries lower than the set threshold range;

[0042] If so, the master control module outputs a charge disable signal to the charge control unit corresponding to the battery with power lower than the set threshold range, and outputs a discharge enable signal to the discharge control units corresponding to the other target batteries with power lower than the set threshold range.

[0043] Further, the method further includes:

[0044] The master control module obtains the temperature of each battery and determines whether it is higher than the preset temperature value;

[0045] When the master control module detects that the temperature of the target abnormal battery is higher than the preset temperature value, it determines the current charge and discharge state of the target abnormal battery;

[0046] When it is determined that the target abnormal battery is in the discharge state, the master control module controls to output a discharge disable signal to the discharge control unit corresponding to the target abnormal battery until the temperature of the target abnormal battery returns to the preset temperature value;

[0047] When it is determined that the target abnormal battery is in the charging state, the master control module controls to output a charge disable signal to the charge control unit corresponding to the target abnormal battery until the temperature of the target abnormal battery returns to the preset temperature value.

[0048] Further, after the step of the master control module outputting a charge selection enable signal to the charge selection module, outputting a charge enable signal to the charge control units corresponding to all the batteries, and outputting a discharge disable signal to the discharge control units corresponding to all the batteries, it further includes:

[0049] When the master control module detects that the power of the target battery is full, it outputs a charge disable signal to the charge control unit corresponding to the target battery, so that the adapter power supply stops charging the target battery;

[0050] When the main control module detects that the power of all batteries is fully charged, it outputs a charging selection disabling signal to the charging selection module to stop the adapter power supply from charging all batteries.

[0051] The power management system for an ultrasonic device provided by an embodiment of the present invention can ensure that the power of all battery packs is maintained within a set threshold range by adjusting the charge and discharge states of the battery packs in real time, avoiding overcharging or over-discharging and extending the service life of the batteries; through the design of the dynamic equalization module, the batteries can self-equalize without an external power supply, ensuring the consistency and stability of the batteries after long-term operation of the device; by setting a power conversion unit and an equalization unit in the discharge equalization module, the output current of each battery pack can be adjusted during the discharge process to ensure that all battery packs discharge together, achieving battery equalization during the discharge process and avoiding the situation of individual batteries being over-discharged or not fully utilized, improving the energy efficiency and endurance of the overall battery pack; through dynamic equalization and discharge equalization technologies, it is ensured that the power of each battery in a multi-battery parallel system can be fully utilized, especially in the case of high-power loads, avoiding the problem of insufficient system power supply caused by uneven battery power, thereby improving the endurance and overall performance of the device; it solves the problems that the existing system cannot achieve discharge equalization and cannot self-equalize without an external adapter power supply. Description of the Drawings

[0052] Figure 1 It is a schematic diagram of the modules of the power management system for an ultrasonic device in the first embodiment of the present invention;

[0053] Figure 2 It is a schematic structural diagram of the power management system for an ultrasonic device in the first embodiment of the present invention;

[0054] Figure 3 It is a schematic structural diagram of the dynamic equalization module in the power management system for an ultrasonic device in the first embodiment of the present invention;

[0055] Figure 4 It is a schematic structural diagram of the main control module, discharge selection module and load in the power management system for an ultrasonic device in the first embodiment of the present invention;

[0056] Figure 5 It is a schematic flowchart of the power management method for an ultrasonic device in the second embodiment of the present invention;

[0057] The following specific embodiments will further illustrate the present invention in conjunction with the above drawings. Specific Embodiments

[0058] To facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of the present invention more thorough and comprehensive.

[0059] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be a middle element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be a middle element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration.

[0060] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs. The terms used in the description of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0061] Embodiment 1

[0062] Please refer to Figure 1 , which shows the power management system for an ultrasonic device in the first embodiment of the present invention. For the convenience of description, only the parts related to the embodiments of the present invention are shown. The power management system for an ultrasonic device provided by the embodiments of the present invention includes a main control module, and a charging selection module, a dynamic equalization module, a discharging selection module and a load, all of which are connected to the main control module;

[0063] The inputs of the charging selection module and the discharging selection module are respectively connected to the accessible adapter power supply and the battery bus power supply output by the dynamic equalization module. The output of the charging selection module is connected to the input of the dynamic equalization module. The output of the discharging selection module is connected to the load discharging control module in the load;

[0064] The dynamic equalization module includes multiple battery packs composed of multiple batteries connected in parallel, a charging equalization module respectively connected to each battery input and the charging selection module, and a discharging equalization module respectively connected to each battery output and the discharging selection module;

[0065] The charging equalization module includes respective charging control units correspondingly connected to each battery input and charging selection module. The discharging equalization module includes respective discharging control units correspondingly connected to each battery output, a plurality of power conversion units connected to the respective discharging control units corresponding to each battery pack, and an equalization unit connected to each power conversion unit, wherein each battery pack is connected to one power conversion unit through its corresponding plurality of discharging control units;

[0066] When the adapter power supply is not connected, the main control module is configured to correspondingly control the discharging control units corresponding to the batteries with power levels not lower than the set threshold range to discharge and control the charging control units corresponding to the batteries with power levels lower than the set threshold range to charge according to the power levels of the respective batteries collected, until the power levels of all the batteries are within the set threshold range.

[0067] Among them, in an embodiment of the present invention, the power management system is applied to an ultrasonic device. The ultrasonic device adopts a dual power supply mode, that is, an adapter power supply and a battery bus power supply. The ultrasonic device generally includes an ultrasonic probe or a transducer, which is used to convert an electrical signal into a mechanical wave (ultrasonic wave) or convert the reflected ultrasonic wave signal back into an electrical signal. In order to generate a sufficiently strong ultrasonic wave, especially when detecting or treating in deeper tissues, a high-power driving signal is required. Therefore, the ultrasonic device needs high-power driving during ultrasonic scanning. Of course, it can be understood that other components of the ultrasonic device also have high-power requirements, which are determined according to actual needs and are not specifically limited herein.

[0068] Further, in an embodiment of the present invention, refer to Figure 2As shown, the input of the charging selection module is respectively connected to the accessible adapter power supply and the battery bus power supply output by the dynamic equalization module. The output of the charging selection module is connected to the input of the dynamic equalization module, and the control end of the charging selection module is connected to the main control module. At this time, the charging selection module determines whether to output the charging bus power to the dynamic equalization module for charging according to the control of the main control module. Among them, the charging selection module serves as a path selection circuit for the adapter power supply and the battery bus power supply. Specifically, the charging selection module includes a pair of back-to-back MOS transistors and a first controller. Specifically, the gates of the two MOS transistors are connected to the first controller, and the drains of the two MOS transistors are connected to the dynamic equalization module. The source of one MOS transistor is connected to the accessible adapter power supply, and the source of the other MOS transistor is connected to the battery bus power supply output by the dynamic equalization module. The first controller is connected to the charging selection control signal terminal (CHG_BUS_EN) of the main control module. At this time, a pair of back-to-back MOS transistors and the first controller in the charging selection module form an ideal diode circuit. The main function of the ideal diode circuit is to automatically select the path with the higher voltage between different power supplies to achieve unidirectional conduction of current, and no energy loss or heat is generated when the current passes, so as to achieve the optimal charging path selection and avoid the voltage drop problem existing in traditional diodes, while reducing energy loss. That is, the ideal diode circuit is used to select the larger voltage value between the adapter power supply (AC_BUS) and the battery bus power supply (BAT_BUS) as the charging bus power and provide it to the dynamic equalization module for charging. It should be noted that the battery bus power supply voltage is usually set lower than the adapter power supply voltage. It should be noted that in other embodiments of the present invention, other components can also be selected for the charging selection module to achieve lossless automatic selection of the power supply path, which will not be specifically limited here. At this time, the charging selection control signal terminal (CHG_BUS_EN) of the main control module can output a first control signal for enabling or disabling battery charging to the first controller. When the first control signal is an enabling signal (that is, CHG_BUS_EN is at a high level), the first controller drives the charging selection module to be enabled to work at this time. The charging selection module will automatically select the larger voltage between the adapter power supply and the battery bus power supply and use it as the charging bus power (CHG_BUS) to provide it to the dynamic equalization module. That is, when an adapter power supply is externally connected to the ultrasonic device, the charging selection module outputs the adapter power supply (as the charging bus power) to the dynamic equalization module; when the adapter power supply is not connected to the ultrasonic device, the charging selection module outputs the battery bus power supply (as the charging bus power) to the dynamic equalization module.When the first control signal is a disabling signal (i.e., CHG_BUS_EN is at a low level), the charging selection module is disabled at this time, the charging selection module is disconnected, and the output voltage to the dynamic equalization module is stopped. At this time, the voltage of the charging bus (CHG_BUS) is 0V, so that the dynamic equalization module will not be charged. It is mainly applicable to stop the charging operation after the adapter power supply fully charges each battery pack in the dynamic equalization module. It should be noted that the main control module is connected to the charging selection module mainly to control the working state of the charging selection module.

[0069] Further, in an embodiment of the present invention, the input of the discharge selection module is respectively connected to the accessible adapter power supply and the battery bus power supply output by the dynamic equalization module. The output of the discharge selection module is connected to the load discharge control module in the load. The control end of the discharge selection module drives the discharge selection module to work constantly. At this time, the discharge selection module selects the larger voltage value between the adapter power supply (AC_BUS) and the battery bus power supply (BAT_BUS) as the discharge bus power (DSG_BUS). Specifically, the setting of the discharge selection module can be specifically referred to the above-mentioned charging selection module. The discharge selection module includes a pair of back-to-back MOS transistors and a second controller. Specifically, the gates of the two MOS transistors are connected to the second controller, and the drains of the two MOS transistors are connected to the main control module and the load discharge control module in the load. The source of one MOS transistor is connected to the accessible adapter power supply (AC_BUS), and the source of the other MOS transistor is connected to the battery bus power supply (BAT_BUS) output by the dynamic equalization module. The second controller controls the two MOS transistors to work constantly. At this time, the larger voltage value between the adapter power supply (AC_BUS) and the battery bus power supply (BAT_BUS) is used as the discharge bus power. That is, when the adapter power supply is connected, the discharge selection module outputs the adapter power supply as the discharge bus power; when the adapter power supply is not connected, the discharge selection module outputs the battery bus power supply as the discharge bus power. It should be noted that in other embodiments of the present invention, other components can also be selected for the discharge selection module to achieve a lossless automatic selection of the power path, which is not specifically limited here. At the same time, it should be noted that the output of the discharge selection module is also connected to the power conversion unit in the main control module. The power conversion unit takes the discharge bus power output by the discharge selection module as the input and outputs the power supply (STB_PWR) after power conversion to provide the working power supply for the main control unit in the main control module. The power supply is a constant power supply. When the system is not connected to the adapter power supply and not powered on, the discharge bus power output by the battery bus power supply is converted by the power conversion unit of the power conversion unit to provide power for the main control unit, so that the main control unit can work constantly. It should be noted that the main control module is connected to the discharge selection module mainly to provide power supply according to the discharge bus power output by the discharge selection module.

[0070] Further, in an embodiment of the present invention, the dynamic balancing module includes multiple battery packs each composed of multiple batteries connected in parallel, a charging balancing module, and a discharging balancing module. Each battery pack is connected to the charging selection module through the charging balancing module and to the discharging selection module through the discharging balancing module. Specifically, in the embodiment of the present invention, to reduce the difficulty of the structural design of the ultrasonic device and to enable the normal air transportation of the ultrasonic device, the batteries in the dynamic balancing module are set as multiple battery packs, and multiple batteries are connected in parallel in each battery pack. Referring to Figure 2 and Figure 3 as shown, there are m battery packs in the dynamic balancing module, and n batteries are connected in parallel in each battery pack. At this time, M1_PACK1 in the above Figure 2 represents the first battery in the first battery pack, and so on. M1_PACKn represents the nth battery in the first battery pack, and Mm_PACKn represents the nth battery in the mth battery pack. Further, in an embodiment of the present invention, each battery is equipped with an independent BMS system (Battery Management System), and this BMS system is responsible for functions such as temperature monitoring and battery state assessment of the battery it is connected to. Each BMS system can communicate bidirectionally with the input / output terminal (I / O) of the main control unit in the main control module through a communication interface (such as I2C, SPI, CAN, etc.) to transmit the state data of each battery (such as battery voltage, current, temperature, charge and discharge state, etc.) to the main control unit, so that the main control unit can uniformly manage and coordinate each battery through the state data of each battery to ensure the safe and efficient operation of the system. Therefore, by connecting multiple batteries in parallel, not only can the load be shared jointly, but also the load-carrying capacity of the overall system can be improved when the battery capacity is small, thereby reducing the volume of a single battery while ensuring the power demand. At the same time, by connecting multiple batteries in parallel, the system can reduce the capacity of each battery without affecting the overall performance and endurance of the system, thereby effectively improving the overall utilization rate of the batteries. At the same time, in the parallel structure, if one battery has a problem, the other batteries can still continue to work, thereby reducing the risk of system failure and improving the reliability of the system. Further, through real-time charge and discharge control and balancing management of each battery, it is ensured that the load of each battery is relatively balanced, avoiding over-discharge or over-charging of some batteries, extending the battery life and enhancing the reliability of the entire system.

[0071] Further, the charging balancing module includes respective charging control units corresponding to the inputs of each battery and the charging selection module. Among them, referring to Figure 2 and Figure 3 as shown, there are m battery packs in the dynamic balancing module, and n batteries are connected in parallel in each battery pack, and each battery is respectively connected to a corresponding charging control unit. At this time, the aboveFigure 2 M1_CHARGE1 in it represents the charge control unit corresponding to the first battery (M1_PACK1) in the first group of battery packs, and so on. Further, each charge control unit is also respectively connected to each charge control signal terminal (M_CHG_EN) of the main control module. Specifically, the charge control unit (M1_CHARGE1) corresponding to the first battery (M1_PACK1) in the first group of battery packs is connected to the first charge control signal terminal (M1_CHG1_EN) of the main control module, and so on. At this time, the main control module can output a second control signal for enabling or disabling the charging of each battery to each charge control unit, thereby adjusting and controlling the charging operation of each battery. For example, when the second control signal output from the first charge control signal terminal (M1_CHG1_EN) of the main control module to the charge control unit (M1_CHARGE1) corresponding to the first battery (M1_PACK1) in the first group of battery packs is an enabling signal (i.e., M1_CHG1_EN is at a high level), the charge control unit is enabled to work and starts the charging operation of this battery. Among them, the charge control unit is responsible for adjusting the charging process of each battery. Usually, it needs to precisely control the charging current and voltage. The devices it usually uses include MOS transistors, DC-DC converter chips, charge management ICs, current sensors / Hall sensors, and overvoltage protection and overcurrent protection circuits. Among them, the MOS transistor is used to control the switch of the charging path to control the charging current. The DC-DC converter chip is used to convert the external power supply into the charging voltage required by the battery. Among them, the common ones are boost, buck, and buck-boost converter chips. The charge management IC is used to manage multiple charging parameters (such as constant current charging, constant voltage charging, trickle charging, etc.). The current sensor / Hall sensor is used to monitor the charging current in real time to ensure charging safety and efficiency. The overvoltage protection and overcurrent protection circuits are used to prevent overvoltage and overcurrent charging of the battery to protect the battery safety. It should be noted that in the specific embodiment of the present invention, it can use more or fewer of the above devices to implement the charging operation of the charge control unit, which is set according to actual usage needs, and the device setting of the charge control unit is not specifically limited here.

[0072] Further, the discharge equalization module includes a plurality of discharge control units respectively connected to the outputs of each battery, a plurality of power conversion units connected to the discharge control units corresponding to each battery pack, and an equalization unit connected to each power conversion unit, wherein each battery pack is connected to a power conversion unit through its corresponding plurality of discharge control units; wherein the discharge control unit includes a pair of back-to-back MOS transistors. Specifically, the source of one MOS transistor is connected to the battery, the source of the other MOS transistor is connected to the power conversion unit, the gates of the two MOS transistors are both connected to the discharge control signal terminal (M_DSG_EN) of the main control module, and the drains of the two MOS transistors are connected to each other. Specifically, the discharge control unit corresponding to the first battery (M1_PACK1) in the first battery pack is connected to the first discharge control signal terminal (M1_DSG1_EN) of the main control module, and so on. At this time, the main control module can output a third control signal enabling or disabling the discharge of each battery to the discharge control unit, so as to adjust and control the discharge operation of each battery. At the same time, the battery voltage output by the discharge control unit is used as the input of the power conversion unit. For example, when the third control signal output from the first discharge control signal terminal (M1_DSG1_EN) of the main control module to the discharge control unit corresponding to the first battery (M1_PACK1) in the first battery pack is an enabling signal (i.e., M1_DSG1_EN is at a high level), the discharge control unit is enabled to start the discharge process of the battery at this time. Each battery pack is connected to a power conversion unit through its plurality of discharge control units, that is, the discharge control units corresponding to the n batteries in the first battery pack are all connected to a power conversion unit as described above, and the discharge control units corresponding to the n batteries in the second battery pack are all connected to another power conversion unit, and so on. It should be noted that in other embodiments of the present invention, other components can also be selected for the discharge control unit to control whether the battery voltage output by the battery is output to the power conversion unit, which is not specifically limited herein.

[0073] Further, its power conversion unit is connected to multiple discharge control units corresponding to the battery pack, and is used to adjust the voltage between the batteries so as to adjust the output voltage of each battery to a unified battery bus voltage to provide the voltage required by the load and ensure the stable operation of the system. The power conversion unit adjusts the output voltage of the battery through different voltage conversion technologies and converts the voltage of the battery into a battery bus voltage suitable for system power supply. Common conversion methods include BUCK, BOOST, BUCK-BOOST, CUK, SEPIC, flyback, etc. Among them, BUCK is a buck conversion, suitable for converting a higher voltage into a lower voltage. BOOST is a boost conversion, suitable for boosting a lower voltage to a higher voltage. BUCK-BOOST can both boost and buck, adapting to the change of the input voltage. CUK, SEPIC, flyback, etc. are other types of voltage conversion methods, and the specific application is selected according to the design requirements. The devices usually used in the power conversion unit include DC-DC converter chips, MOS transistors or IGBTs, inductors and capacitors, diodes (such as Schottky diodes), and controller ICs. The DC-DC converter chip is mainly responsible for boosting, bucking or buck-boosting the voltage. MOS transistors or IGBTs are power switch transistors used to control the switching conversion of high current. Among them, SFETs are often used in low-voltage occasions, while IGBTs are more suitable for high-voltage and high-power applications. Inductors and capacitors are used for filtering to ensure that the output voltage is smooth and stable. Inductors and capacitors are key passive components of the DC-DC circuit, used for energy storage and output smoothing. Diodes (such as Schottky diodes) are used for fast and low-loss rectification in power conversion, reducing power loss and improving conversion efficiency. The controller IC is used to manage the timing, feedback and adjustment of power conversion, and usually includes PWM (pulse width modulation) control function. It should be noted that in the specific embodiment of the present invention, it can use more or fewer of the above devices to implement the voltage conversion operation of the power conversion unit, which is set according to actual usage needs, and the device setting of the power conversion unit is not specifically limited herein.

[0074] Further, the equalization unit is connected to each power conversion unit. Specifically, refer to Figure 2 and Figure 3As shown, it includes a plurality of balancing units, and each balancing unit is connected to two adjacent power conversion units. It should be noted that in other embodiments of the present invention, it can also be arranged that one balancing unit is connected to all power conversion units, and it is set according to actual usage requirements, and no specific limitation is made here. The balancing unit is responsible for managing the charge balance between batteries to ensure that the discharge states of each battery are consistent. The specific power conversion circuit monitors the current output during the battery discharge process in real time. The sampled current data is transmitted to the balancing unit, and the balancing unit understands the discharge conditions of each battery through the current data and judges whether the currents of each battery are balanced. If the current output of a certain battery is large while the current output of another battery is small, the balancing unit will rebalance these currents by adjusting the working state of the power conversion unit, so that the discharge currents of different batteries are dynamically adjusted to tend to be the same. That is, if the current output of a certain battery is large, the balancing unit will adjust the power conversion unit through the current feedback data to reduce the current output of this battery or increase the current output of other batteries until the currents of each battery tend to be balanced, ensuring the current balance between different batteries. At this time, the current output by each group of power conversion units is the same, thus realizing the discharge balance of the batteries. At this time, the voltage output by the discharge balance module is the battery bus voltage, and the current output by the discharge balance module is the sum of the currents output by each group of power conversion units, so as to ensure that all batteries can contribute current evenly, avoid overloading of a single battery, make full use of the discharge capacity of each battery, and improve the overall discharge rate and efficiency. For example, assuming that the load requires a total current output of 20A, if 4 battery packs are connected in parallel, the current output of each battery pack is 5A at this time. Therefore, by connecting multiple battery packs in parallel, a larger instantaneous current can be provided to meet the requirements of high-rate discharge. Among them, the devices commonly used in the balancing unit include: passive balancing devices, active balancing devices, battery balancing ICs, and current sampling resistors / Hall sensors. The passive balancing devices usually include resistors and inductors, which are used to dissipate excessive energy through resistors or inductors to achieve the purpose of battery voltage balance. The active balancing devices usually include MOS transistors, capacitors, and DC-DC converters. The MOS transistors are used for switching control of the energy transfer between batteries, the capacitors are used to temporarily store energy and transfer it to other batteries, the DC-DC converters are used to transfer electric charge from the battery pack with a higher voltage to the battery pack with a lower voltage, the battery balancing ICs are used for battery balancing management, and the current sampling resistors / Hall sensors are used to monitor the current between batteries to ensure the accuracy of the balancing process. It should be noted that in the specific embodiments of the present invention, it can use more or fewer of the above devices to implement the discharge balancing operation of the balancing unit, and it is set according to actual usage requirements, and no specific limitation is made on the device setting of the balancing unit here.

[0075] Further, in an embodiment of the present invention, referring toFigure 2 and Figure 4 As shown in Figure 4 , the load includes a load discharge control module and a subsequent-stage circuit. The load discharge control module is respectively connected to the output of the discharge selection module, the main control module, and the subsequent-stage circuit. Specifically, the load discharge control module is connected to the load discharge control signal terminal (PWR_EN) of the main control module. At this time, the load discharge control signal terminal (PWR_EN) of the main control module can output a fourth control signal for enabling or disabling the power supply of the subsequent-stage circuit to the load discharge control module. When the fourth control signal is an enabling signal (i.e., PWR_EN is at a high level), the load discharge control module is enabled to work. The load discharge control module will connect the discharge selection module and the subsequent-stage circuit. At this time, the discharge bus power provided by the discharge selection module powers the subsequent-stage circuit. When the fourth control signal is a disabling signal (i.e., PWR_EN is at a low level), the load discharge control module is disabled, and the load discharge control module is disconnected, stopping the output of the discharge bus power to the subsequent-stage circuit, achieving low power consumption, and thus extending the service life of the battery.

[0076] Further, in an embodiment of the present invention, referring to Figure 2 and Figure 4As shown in the figure, the main control module is respectively connected to the control end of the above-mentioned charging selection module, the output of the discharge selection module, the load discharge control module in the load, and each battery, the charging control unit and the discharge control unit in the dynamic equalization module. At this time, the output of the discharge selection module is connected to the power conversion unit in the main control module, so that the discharge bus power output by the discharge selection module can provide power for the main control unit after being converted by the power conversion unit of the power conversion unit, so that the main control unit can work stably. The control end of the charging selection module is connected to the charging selection control signal terminal (CHG_BUS_EN) of the main control unit in the main control module, and is used to determine whether to output the charging bus power to the dynamic equalization module for charging according to the first control signal output by the charging selection control signal terminal (CHG_BUS_EN) in the main control unit. The load discharge control module in the load is connected to the load discharge control signal terminal (PWR_EN) of the main control unit in the main control module, and is used to determine whether to output the discharge bus power output by the discharge selection module to the subsequent circuit for power supply according to the fourth control signal output by the load discharge control signal terminal (PWR_EN) of the main control unit. Each battery communicates with the input / output terminal (I / O) of the main control unit in the main control module by using the equipped BMS system, so that the input / output terminal (I / O) of the main control unit can obtain the state data of each battery in real time. The charging control unit is connected to the charging control signal terminal (M_CHG_EN) of the main control unit in the main control module, and is used to determine whether to output the charging bus power output by the charging selection module to the battery for charging according to the second control signal output by each charging control signal terminal (such as M1_CHG1_EN) of the main control unit. The discharge control unit is connected to the discharge control signal terminal (M_DSG_EN) of the main control unit in the main control module, and is used to determine whether to control the battery to discharge according to the third control signal output by each discharge control signal terminal (such as M1_DSG1_EN) of the main control unit.

[0077] Furthermore, the main control module can also control the operation of each module unit to realize the power management of the ultrasonic device. Specifically, when the adapter power supply is not connected, the main control module is used to control the discharge control unit corresponding to the battery with a power level not lower than the set threshold range to discharge and the charging control unit corresponding to the battery with a power level lower than the set threshold range to charge according to the power of each battery collected, until the power of all batteries is within the set threshold range. It should be noted that the main control module can also perform other more specific power management operations. The specific implementation principle and the technical effects produced can refer to the power management method in the subsequent second embodiment. For the sake of brief description, the corresponding content in the subsequent second embodiment can be referred to for the parts not mentioned in the embodiments of the present invention.

[0078] In the embodiments of the present invention, by adjusting the charge and discharge states of the battery packs in real time, it is ensured that the power of all battery packs is maintained within a set threshold range, avoiding overcharging or over-discharging, and extending the service life of the batteries; through the design of the dynamic equalization module, the batteries can self-equalize without an external power source, ensuring the battery consistency and stability after long-term operation of the device; by setting a power conversion unit and an equalization unit in the discharge equalization module, the output current of each battery pack can be adjusted during the discharge process, ensuring that each battery pack discharges together, achieving battery equalization during the discharge process, avoiding the situation of over-discharging or under-utilization of individual batteries, and improving the energy efficiency and endurance of the overall battery pack; through the dynamic equalization and discharge equalization technologies, it is ensured that the power of each battery in the multi-battery parallel system can be fully utilized, especially in the case of high-power loads, avoiding the problem of insufficient system power supply caused by uneven battery power, thereby improving the endurance and overall performance of the device; the problems that the existing system cannot achieve discharge equalization and cannot self-equalize without an external adapter power supply are solved.

[0079] Embodiment 2

[0080] Please refer to Figure 5 , which shows the power management method for an ultrasonic device in the second embodiment of the present invention. For the sake of convenience of description, only the parts related to the embodiments of the present invention are shown. The power management method for an ultrasonic device provided by the embodiments of the present invention is applicable to the power management system for an ultrasonic device provided in the above-mentioned first embodiment, and the method includes:

[0081] Step S10, the main control module determines whether an adapter power source is connected to the power management system;

[0082] Specifically, in an embodiment of the present invention, this power management method is applied to an ultrasonic device and is applicable to the power management system described in the above-mentioned first embodiment, aiming to effectively manage the charging and discharging processes of multiple battery packs inside the power management system, ensure the power balance of the battery packs during use, and improve the battery use efficiency and service life. When the power management system is started, the main control module first determines whether an external adapter power source is connected by detecting the voltage signal of the adapter power interface.

[0083] Among them, the adapter power interface usually sends its status to the main control module through an adapter present signal (usually a voltage signal). This signal can have two possible voltage states: a pulled-up voltage and a pulled-down voltage. Specifically, when the adapter power is connected, the power interface may pull up the signal through a certain circuit (such as 5V or 3.3V), and the main control module determines that the adapter power is connected to the power management system through the high-level state. When the adapter power is disconnected or not connected, the power interface may pull down the signal (such as 0V), and the main control module determines that the adapter power is not connected to the power management system through the low-level state. Therefore, the main control module continuously monitors the adapter present signal in the adapter power interface. If the adapter present signal is in the pulled-up state, the main control module determines that the adapter power has been connected to the power management system. If the adapter present signal is in the pulled-down state, the main control module determines that the adapter power is not connected to the power management system. Among them, when the main control module determines that there is an adapter power connected to the power management system, step S20 is executed; otherwise, step S30 is executed.

[0084] Step S20: The main control module outputs a charging selection enable signal to the charging selection module, outputs a charging enable signal to the charging control units corresponding to all batteries, and outputs a discharge disable signal to the discharge control units corresponding to all batteries.

[0085] Among them, in an embodiment of the present invention, when the main control module determines that there is an adapter power connected to the power management system, the main control module outputs a charging selection enable signal to the charging selection module, outputs a charging enable signal to the charging control units corresponding to all batteries, and outputs a discharge disable signal to the discharge control units corresponding to all batteries, so as to charge all batteries through the adapter power. Specifically, first, the main control module outputs a charging selection enable signal to the charging selection module, allowing the adapter power to charge the battery pack and activating the charging process, so that the charging selection module outputs the adapter power to each charging control unit according to the charging selection enable signal. Then, the main control module outputs a charging enable signal to the charging control unit corresponding to each battery, so that the adapter power charges all batteries. At the same time, the main control module outputs a discharge disable signal to the discharge control units of all batteries, prohibiting the batteries from discharging to the load, thereby preventing the batteries from discharging to the load simultaneously during the charging process and causing unnecessary battery loss, ensuring that no battery discharges to the load during charging to optimize the charging efficiency. At this time, correspondingly, the adapter power can supply power to the main control module and subsequent loads after passing through the discharge selection module. When the main control module obtains the power-on signal, the main control module directly sends a load discharge enable signal to the load discharge control module, and at this time, the adapter power directly supplies power to the subsequent circuit in the load.

[0086] Furthermore, in an embodiment of the present invention, after this step, it further includes:

[0087] When the main control module detects that the target battery is fully charged, it outputs a charging disable signal to the charging control unit corresponding to the target battery, so that the adapter power supply stops charging the target battery;

[0088] When the main control module detects that all batteries are fully charged, it outputs a charging selection disable signal to the charging selection module, so that the adapter power supply stops charging all batteries.

[0089] Step S30, the main control module determines whether the power of each battery is within a set threshold range according to the collected power of each battery;

[0090] Among them, in one embodiment of the present invention, when the main control module determines that there is no adapter power supply connected to the power management system, the main control module determines the power of each battery according to the status data transmitted by the BMS system equipped with each battery. Specifically, according to the voltage and current information of the battery, the main control module estimates the remaining power of the battery through the characteristics of the battery (such as discharge curve, capacity and voltage relationship). The battery power estimation method can be based on open circuit voltage (OCV), coulomb counting method (current integration) or SOC (State of Charge) estimation method, wherein the OCV method is to measure the open circuit voltage of the battery and calculate the SOC of the battery in combination with the charge and discharge curve of the battery. The coulomb counting method estimates the change in the battery power by integrating the discharge current of the battery. SOC estimation is to calculate the SOC of the battery by a special algorithm based on factors such as battery voltage, current and temperature.

[0091] Furthermore, the main control module determines a set threshold range based on the collected power of each battery. Specifically, the set threshold can be the average power of all batteries. At this time, the set threshold range is determined based on a preset tolerance range (such as ±2%). At this time, the set threshold range determines the target power that each battery needs to reach to maintain the power balance between batteries. When the main control module determines that the power of all batteries is within the set threshold range, step S40 is executed; otherwise, when the main control module determines that there is a battery whose power is not within the set threshold range, step S50 is executed.

[0092] Step S40, the main control module outputs a charging selection disable signal to the charging selection module, and outputs a discharging enable signal to the discharging control units corresponding to all batteries;

[0093] Among them, in one embodiment of the present invention, when the main control module determines that the power levels of all batteries are within the set threshold range, the system enters the discharge mode. At this time, the main control module outputs a charge selection disable signal to the charge selection module, and outputs a discharge enable signal to the discharge control units corresponding to all batteries, so that all batteries are discharged synchronously and charging of all batteries is prohibited.

[0094] Step S50, the main control module outputs a charging selection enable signal to the charging selection module, outputs a discharging enable signal to the discharging control unit corresponding to the battery with a power level not lower than the set threshold range, and outputs a charging enable signal to the charging control unit corresponding to the battery with a power level lower than the set threshold range;

[0095] Among them, in an embodiment of the present invention, if there is a battery with a power level not within the set threshold range, it indicates that there is a power difference between the batteries and power equalization processing is required. At this time, the main control module outputs a charging selection enable signal to the charging selection module and outputs a discharging enable signal to the discharging control unit corresponding to the battery with a power level not lower than the set threshold range, so as to supply power to the battery bus power supply through the voltage output of the battery with a power level not lower than the set threshold range. At the same time, the main control module outputs a charging enable signal to the charging control unit corresponding to the battery with a power level lower than the set threshold range, so as to charge each battery with a power level lower than the set threshold range through the battery bus power supply, so that the power levels of all batteries reach the set threshold range, thereby realizing the charging self - equalization of the batteries. Therefore, in the case of uneven battery power levels and no external adapter power supply, the main control module controls the charging control unit and the discharging control unit in the dynamic equalization module to perform energy regulation between battery packs, so that the batteries with high power levels discharge to charge the batteries with low power levels until the power levels of all battery packs are within the set threshold range, ensuring a continuous and stable power supply for the load. At the same time, the power conversion unit and the equalization unit in the dynamic equalization module realize the equalized discharge between battery packs. At this time, the main control module dynamically monitors the power status of the batteries, adjusts the charge - discharge strategy in real time, ensures that the batteries are in an efficient operation state, extends the battery life and guarantees the power supply requirements of the load.

[0096] Further, the step of outputting the discharging enable signal to the discharging control unit corresponding to the battery with a power level not lower than the set threshold range includes:

[0097] The main control module determines the proportion of the number of batteries with a power level higher than the set threshold range according to the power levels of each battery, and judges whether it is greater than the first preset proportion;

[0098] If so, the main control module outputs a discharging enable signal to the discharging control unit corresponding to the battery with a power level higher than the set threshold range;

[0099] If not, the main control module outputs a discharging enable signal to the discharging control unit corresponding to the battery with a power level not lower than the set threshold range.

[0100] Specifically, the master control module acquires the real-time power data of each battery, counts the number of batteries with power higher than the set threshold range, and calculates the proportion of this number in the total number of batteries. Then, the master control module compares the calculated proportion of the number of batteries with power higher than the set threshold range with the pre-set first proportion to determine whether there are enough batteries to meet the discharge demand. If the proportion of the number of batteries with power higher than the set threshold range is greater than the first preset proportion, the master control module preferentially selects the batteries with power higher than the set threshold range for discharge. If the proportion of the number of batteries with power higher than the set threshold range is less than or equal to the first preset proportion, the master control module will relax the conditions and select the batteries with power not lower than the set threshold range for discharge to ensure sufficient power supply. It should be noted that the master control module preferentially selecting the batteries with power higher than the set threshold range for discharge specifically means selecting the batteries with power higher than the upper limit of the set threshold range for discharge, and selecting the batteries with power not lower than the set threshold range for discharge means selecting the batteries with power higher than the lower limit of the set threshold range for discharge. In the above process, the dynamic balancing module continues to participate in the regulation. Through the cooperation of charging and discharging strategies, it ensures that the batteries with power not lower than the set threshold range participate in the discharge, and at the same time, the dynamic balancing module replenishes the charge of the batteries with power lower than the set threshold range, gradually adjusting the power of all batteries to a reasonable range, so as to ensure that the system can flexibly dispatch battery resources when the battery power distribution is uneven, make the system operate stably, and at the same time avoid over-discharging of the batteries and ensure the battery life.

[0101] It should be noted that since the master control module charges the batteries with high power for the batteries with low power, its load also requires corresponding power supply, which consumes the power of the currently discharged batteries accordingly. Therefore, in the embodiment of the present invention, the step of determining the set threshold range according to the power of each battery needs to be repeated correspondingly every preset time, so that all batteries are finally dynamically adjusted to be within the same set threshold range, and all batteries are discharged synchronously.

[0102] At the same time, it should be noted that when the power management system starts, when the power of one or more batteries is too high and the power of most other batteries is roughly the same, according to the calculation and processing method of the set threshold range described above, the set threshold range may be higher than the normal value, resulting in only these batteries with too high power discharging, while most other batteries with average power are still charging at the same time. If only one or a few batteries are discharging at this time and the load demand is large, these batteries may not be able to provide enough power to meet the load power supply and the charging of other batteries at the same time, resulting in insufficient power supply. Therefore, to solve the above technical problems, in an embodiment of the present invention, the step of the master control module judging whether the power of each battery is within the set threshold range according to the power of each battery collected includes:

[0103] The master control module obtains the current power of each battery and calculates the initially set power threshold range based on the current power of each battery;

[0104] The master control module determines the proportion of the number of batteries with a power not lower than the initially set power threshold range according to the power of each battery;

[0105] When the proportion of the number of batteries with a power not lower than the initially set power threshold range is lower than the second preset proportion, the master control module dynamically adjusts the set threshold range until the proportion of the number of batteries not lower than the set threshold range reaches or exceeds the second preset proportion;

[0106] The master control module determines whether the power of each battery is within the dynamically adjusted set threshold range according to the power of each battery collected.

[0107] Specifically, the master control module obtains the real-time power data of each battery, calculates the initially set power threshold range according to the above-mentioned threshold setting method, then the master control module calculates the proportion of the number of batteries with a power not lower than the initially set power threshold range, and compares the current proportion of the number of batteries with the second preset proportion. When it is compared that the proportion of the number of batteries is higher than the second preset proportion, the master control module directly determines whether the power of each battery is within the initially set power threshold range; when it is compared that the proportion of the number of batteries is lower than the second preset proportion, the master control module dynamically adjusts the upper and lower limits of the threshold range. Specifically, it lowers the lower limit of the power threshold range to increase the number of batteries with a power not lower than the initially set power threshold range. At this time, the master control module continuously adjusts the threshold range until the preset requirement for the proportion of the number of batteries is met. After the master control module dynamically adjusts the threshold range, it determines again which batteries have a power within the new set threshold range, calculates the adjusted proportion of the number of batteries, and determines whether it reaches the second preset proportion. If so, the master control module determines whether the power of each battery is within the dynamically adjusted set threshold range according to the power of each battery collected, and executes the specific steps in the above steps S40 and S50. At this time, during the process of controlling the batteries with higher power to discharge and charge the batteries with lower power by the master control module, the proportion of the number of batteries not lower than the set threshold range gradually increases until the power of all batteries is within the set threshold range.

[0108] Further, in an embodiment of the present invention, after the step that the master control module outputs a discharge enable signal to the discharge control unit corresponding to the battery with a power higher than the set threshold range, the following steps are further included:

[0109] The master control module monitors the power demand of the load and determines whether the power output from the battery corresponding to the currently output discharge enable signal to the load meets the power demand of the load;

[0110] If not, the main control module outputs a discharge enable signal to the discharge control units corresponding to other batteries.

[0111] Specifically, the main control module can monitor the power demand of the load in real time through current sensors and voltage sensors, or predict the power demand when the load starts based on historical data or a preset starting current curve. Or if the load is controlled by an external device or system (such as the start of certain modes of an ultrasonic device), the main control module can obtain the power demand information of the load through external instructions. After the main control module monitors the power demand of the load, it determines whether the power output from the battery corresponding to the currently output discharge enable signal to the load meets the power demand of the load. Specifically, the main control module also correspondingly monitors the power output of the currently discharging battery pack. The output power of each battery can be calculated through real-time monitoring of the voltage and current of the battery. The main control module accumulates the output powers of all currently discharging batteries to obtain the total battery output power. At the same time, the main control module also correspondingly monitors the power absorption of the currently charging batteries. At this time, based on the total battery output power and the power used for charging, the power output to the load is determined, and then it is judged whether it meets the power demand of the load. If so, the existing state is continued without any operation. If not, it means that the power output of the current battery cannot meet the load demand, and the main control module needs to add more batteries to provide additional power. At this time, the main control module outputs a discharge enable signal to the discharge control units corresponding to other batteries.

[0112] Furthermore, the steps for the main control module to output a discharge enable signal to the discharge control units corresponding to other batteries include:

[0113] The main control module calculates the number of target batteries required for discharge according to the power demand of the load, and sorts all the batteries in descending order of power.

[0114] The main control module determines other target batteries to be discharged based on the calculated number of target batteries, the number of batteries with power higher than the set threshold range, and the sorted battery power order, and outputs a discharge enable signal to the discharge control units corresponding to the other target batteries.

[0115] Specifically, the main control module calculates the number of target batteries that need to discharge according to the power demand of the load, the output power capacity of each battery, and the power demand of the battery that is currently being charged. At the same time, after collecting the battery power information, the main control module sorts the batteries in descending order of power. At this time, batteries with higher power are preferentially selected for discharging to ensure that the system can supply power stably for a longer time and avoid over-discharging of the batteries. After the number of target batteries and the battery power sorting are completed, the main control module needs to select other target batteries that actually need to discharge according to the above information, and preferentially select batteries whose power is within the set threshold range, while ensuring that the calculated number of target batteries is met.

[0116] Further, more specifically, the step of outputting the discharge enable signal to the discharge control unit corresponding to other target batteries includes:

[0117] The main control module determines whether other target batteries include batteries below the set threshold range;

[0118] If so, the main control module outputs a charge disable signal to the charge control unit corresponding to the battery whose power is below the set threshold range, and outputs a discharge enable signal to the discharge control unit corresponding to other target batteries whose power is below the set threshold range.

[0119] Specifically, the main control module first monitors and determines in real time whether there are batteries among other target batteries whose power is below the set threshold range. When the main control module does not detect that the battery power is below the set threshold range, it directly outputs a discharge enable signal to the discharge control unit corresponding to other target batteries. At this time, all the batteries for discharging have a power not lower than the set threshold range, and the batteries with a power lower than the set threshold range can also continue to be charged. When the main control module detects that the power of a certain or some batteries is below the set threshold range, it sends a charge disable signal to the charge control unit corresponding to the battery whose power is below the set threshold range to immediately stop the charging operation of the battery; at the same time, it also outputs a discharge enable signal to the discharge control unit corresponding to other target batteries whose power is below the set threshold range, so that other target batteries with a power lower than the set threshold range still perform a discharge operation to primarily meet the power demand of the load.

[0120] Wherein, in an embodiment of the present invention, the method further includes:

[0121] The main control module obtains the temperature of each battery and determines whether it is higher than the preset temperature value;

[0122] When the main control module detects that the temperature of the target abnormal battery is higher than the preset temperature value, it determines the current charge and discharge state of the target abnormal battery;

[0123] When it is determined that the target abnormal battery is in a discharging state, the main control module controls the output of a discharge disable signal to the discharge control unit corresponding to the target abnormal battery until the temperature of the target abnormal battery returns to the preset temperature value;

[0124] When it is determined that the target abnormal battery is in a charging state, the main control module controls the output of a charge disable signal to the charge control unit corresponding to the target abnormal battery until the temperature of the target abnormal battery returns to the preset temperature value.

[0125] Specifically, the main control module monitors the temperature of each battery in real time to determine whether the temperature of any battery exceeds a preset safety threshold. If an abnormal battery temperature higher than the preset value is detected, the main control module determines whether the battery is in a charging or discharging state. When the abnormal battery is in a discharging state, the main control module outputs a discharge disable signal to immediately stop its discharging behavior. When the abnormal battery is in a charging state, the main control module outputs a charge disable signal to stop charging and prevent the temperature from rising further. When the battery temperature returns within the safety threshold, the main control module re-outputs a discharge or charge enable signal to allow the battery to resume normal operation. When the battery temperature remains too high, the main control module can also trigger an alarm or more stringent protection measures.

[0126] Wherein, in an embodiment of the present invention, the method further includes:

[0127] When the main control module receives a device power-on signal or detects the access of an adapter power supply, the main control module outputs a load discharge enable signal to the load discharge control module so that the discharge bus power output by the discharge selection module powers the load;

[0128] When the main control module receives a device power-off signal and detects that the adapter power supply is not connected, the main control module outputs a load discharge disable signal to the load discharge control module to stop powering the load.

[0129] Specifically, when the main control module receives the device power-on signal, the main control module outputs a load discharge enable signal to the load discharge control module, allowing the battery bus power supply or the adapter power supply to provide power to the load. When the main control module detects the access of the adapter power supply, the main control module directly outputs a load discharge enable signal to the load discharge control module, allowing the adapter power supply to provide power to the load. At this time, the discharge bus power (battery bus power supply or adapter power supply) output by the discharge selection module powers the load. If the adapter power supply is connected, the adapter power supply is preferentially selected to power the load. If the adapter is not connected, the load is powered from the battery bus power supply. When the device is powered off and the adapter power supply is not connected, the main control module outputs a load discharge disable signal to the load discharge control module to stop the battery from supplying power to the load. At this time, the power supply path between the subsequent circuit and the discharge selection module is cut off by the load discharge control module to avoid battery power consumption. Thus, the power management system realizes the power management of the load in different states, ensuring that the load can be normally powered on and avoiding the waste of battery power when the device is powered off.

[0130] In summary, for the power management method for an ultrasonic device in the above embodiments of the present invention, in the absence of an adapter power supply, through the power balance management between batteries, battery self-balancing is achieved, reducing the battery power difference and effectively extending the overall service life of the battery pack; through the power monitoring and balance control of the battery during the discharge process, the problem of over-discharge of some batteries is avoided, enabling the battery pack to work more efficiently, improving the endurance and stability of the device; through the balance management of the battery during the charge and discharge process, the performance degradation caused by battery aging is reduced, effectively extending the service life of the battery. Especially for devices that have not been used for a long time, the battery can also maintain a good state; by monitoring the power demand of the load and dynamically allocating the discharge sequence and power distribution of the battery pack, the high-power load demand of the ultrasonic device can be effectively met, ensuring the continuity and stability of power supply; by real-time monitoring the battery temperature, the charge and discharge state of the battery can be timely controlled when the temperature is abnormal, avoiding the safety risk caused by battery overheating and improving the safety and reliability of the system; by introducing a dynamic threshold adjustment mechanism in the battery management process and dynamically adjusting the balance management strategy according to the battery power state, the flexibility and intelligence of battery management are ensured, making the operation efficiency of the battery pack reach the best state; the problems that the existing system cannot achieve discharge balance and cannot self-balance without external adapter power supply access are solved.

[0131] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0132] The above-described embodiments merely represent several implementation manners of the present invention. The descriptions are relatively specific and detailed, but should not be construed as limiting the scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A power management method for ultrasonic equipment, characterized in that: A power management system applicable to ultrasound equipment, the power management system comprising a main control module, and a charging selection module, a dynamic balancing module, a discharging selection module and a load all connected to the main control module; The inputs of the charging selection module and the discharging selection module are respectively connected to the accessible adapter power supply and the battery bus power supply output by the dynamic balancing module, the output of the charging selection module is connected to the input of the dynamic balancing module, and the output of the discharging selection module is connected to the load discharging control module in the load; The dynamic balancing module includes a plurality of battery packs consisting of a plurality of batteries connected in parallel, a charging balancing module connected to each battery input and charging selection module respectively, and a discharging balancing module connected to each battery output and discharging selection module respectively; The charging balancing module includes charging control units connected to the battery inputs and charging selection modules, and the discharging balancing module includes discharging control units connected to the battery outputs, a plurality of power conversion units connected to the discharging control units corresponding to each battery group, and a balancing unit connected to each power conversion unit, wherein each battery group is connected to a power conversion unit through its corresponding plurality of discharging control units; The method comprises: The main control module determines whether there is an adapter power supply connected to the power management system; If yes, the main control module outputs a charging selection enable signal to the charging selection module, outputs a charging enable signal to the charging control units corresponding to all batteries, and outputs a discharging disable signal to the discharging control units corresponding to all batteries, so that all batteries are charged through the adapter power supply; If not, the main control module determines whether the power of each battery is within the set threshold range based on the collected power of each battery; If the power levels of all batteries are within the set threshold range, the main control module outputs a charge selection disable signal to the charge selection module, and outputs a discharge enable signal to the discharge control units corresponding to all batteries, so that all batteries are discharged synchronously; If there is a battery whose charge is not within the set threshold range, the main control module outputs a charging selection enable signal to the charging selection module, outputs a discharge enable signal to the discharge control unit corresponding to the battery whose charge is not less than the set threshold range, and outputs a charging enable signal to the charging control unit corresponding to the battery whose charge is less than the set threshold range, so as to charge each battery whose charge is less than the set threshold range through the battery bus power supply, and at the same time, the battery bus power supply is powered by the battery whose charge is not less than the set threshold range, so that the charge of each battery reaches the set threshold range.

2. The power management method for ultrasonic equipment according to claim 1, characterized in that: The method further comprises: When the main control module receives a device power-on signal or detects that the adapter power is connected, the main control module outputs a load discharge enable signal to the load discharge control module, so that the discharge bus power output by the discharge selection module supplies power to the load; When the main control module receives a device shutdown signal and detects that the adapter power supply is not connected, the main control module outputs a load discharge disable signal to the load discharge control module to stop supplying power to the load.

3. The power management method for ultrasonic equipment according to claim 1, characterized in that: The step of outputting a discharge enable signal to a discharge control unit corresponding to a battery whose charge is not less than a set threshold range comprises: The main control module determines the proportion of batteries whose power levels are higher than a set threshold range according to the power levels of each battery, and determines whether it is greater than a first preset proportion; If so, the main control module outputs a discharge enable signal to the discharge control unit corresponding to the battery whose charge is higher than the set threshold range; If not, the main control module outputs a discharge enable signal to the discharge control unit corresponding to the battery whose power level is not less than the set threshold range.

4. The power management method for ultrasonic equipment according to claim 1, characterized in that: The step of the main control module judging whether the power of each battery is within a set threshold range according to the collected power of each battery includes: The main control module obtains the current power of each battery and calculates the initially set power threshold range according to the current power of each battery; The main control module determines the proportion of batteries whose power levels are not less than an initially set power threshold range based on the power levels of each battery; When the proportion of batteries within the initially set power threshold range is lower than a second preset proportion, the main control module dynamically adjusts the set threshold range until the proportion of batteries within the set threshold range reaches or exceeds the second preset proportion; The main control module determines whether the power of each battery is within a dynamically adjusted set threshold range according to the collected power of each battery.

5. The power management method for ultrasonic equipment according to claim 3, characterized in that: After the step of the main control module outputting a discharge enable signal to a discharge control unit corresponding to a battery whose charge is higher than a set threshold range, the following step further comprises: The main control module monitors the power demand of the load and determines whether the power output to the load by the battery corresponding to the current output discharge enable signal meets the power demand of the load; If not, the main control module outputs a discharge enable signal to the discharge control units corresponding to other batteries.

6. The power management method for ultrasonic equipment according to claim 5, characterized in that: The step of the main control module outputting a discharge enable signal to the discharge control units corresponding to other batteries includes: The main control module calculates the target number of batteries to be discharged based on the power demand of the load, and sorts all batteries in descending order of power; The main control module determines other target batteries to be discharged according to the calculated number of target batteries, the number of batteries with power levels higher than a set threshold range, and the sorted battery power sequence, and outputs a discharge enable signal to the discharge control units corresponding to the other target batteries.

7. The power management method for ultrasonic equipment according to claim 6, characterized in that: The step of outputting a discharge enable signal to a discharge control unit corresponding to other target batteries includes: The main control module determines whether other target batteries include batteries below a set threshold range; If so, the main control module outputs a charging disable signal to the charging control unit corresponding to the battery whose charge is lower than the set threshold range, and outputs a discharging enable signal to the discharging control units corresponding to other target batteries whose charge is lower than the set threshold range.

8. The power management method for ultrasonic equipment according to claim 1, characterized in that: The method further comprises: The main control module obtains the temperature of each battery and determines whether it is higher than the preset temperature value; When the main control module detects that the temperature of the target abnormal battery is higher than the preset temperature value, it determines the current charge and discharge state of the target abnormal battery; When it is determined that the target abnormal battery is in a discharging state, the main control module controls the output of a discharge disable signal to the discharge control unit corresponding to the target abnormal battery until the temperature of the target abnormal battery returns to a preset temperature value; When it is determined that the target abnormal battery is in a charging state, the main control module controls the output of a charging disable signal to a charging control unit corresponding to the target abnormal battery until the temperature of the target abnormal battery returns to a preset temperature value.

9. The power management method for ultrasonic equipment according to claim 1, characterized in that: After the steps of the main control module outputting a charging selection enable signal to the charging selection module, outputting a charging enable signal to the charging control units corresponding to all batteries, and outputting a discharging disable signal to the discharging control units corresponding to all batteries, the method further includes: When the main control module detects that the target battery is fully charged, it outputs a charging disable signal to the charging control unit corresponding to the target battery, so that the adapter power supply stops charging the target battery; When the main control module detects that all batteries are fully charged, it outputs a charging selection disable signal to the charging selection module, so that the adapter power supply stops charging all batteries.

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