Power management system and method for ultrasonic equipment

Abstract

The invention is suitable for the technical field of medical equipment, and provides a power management system and method for ultrasonic equipment, and the system comprises a main control module, a charging selection module, a dynamic balance module, a discharging selection module, and a load. The inputs of the charging selection module and the discharging selection module are respectively connected with an adapter power supply and a battery bus power supply output by the dynamic balancing module, the output of the charging selection module is connected with the input of the dynamic balancing module, and the output of the discharging selection module is connected with a load discharging control module of a load; the dynamic equalization module comprises a plurality of battery packs formed by connecting a plurality of batteries in parallel, a charging equalization module and a discharging equalization module; the charging equalization module comprises charging control units corresponding to the batteries. The discharging equalization module comprises a discharging control unit, a power conversion unit and an equalization unit. According to the invention, the problems that the existing system cannot realize discharge equalization and cannot realize self-equalization when the power supply is connected without an external adapter are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical equipment, and in particular to a power management system and method for ultrasonic equipment. Background Art

[0002] As a high-power, high-precision medical device, ultrasound equipment is widely used in diagnosis and treatment processes. It has high requirements for the equipment power supply system, especially in desktop high-power ultrasound equipment. In order to ensure that the equipment can operate stably under high load, a dual power supply system is usually adopted, that is, the AC power is converted into DC power through a power adapter, or it is automatically switched to battery PACK power supply when the AC power is not connected.

[0003] However, in practical applications, the solution of powering with a single battery PACK is limited by the battery capacity and discharge rate, and cannot simultaneously meet the needs of long battery life and high-power applications of high-power equipment. For high-power ultrasound equipment, if the capacity and discharge rate of a single battery are simply increased to improve the performance of the equipment, the battery volume will increase significantly, increasing the difficulty of equipment structure design. At the same time, if the energy of the battery PACK exceeds 100Wh, it will be restricted to use dangerous goods packaging boxes (UN boxes) for air transportation during transportation, which brings inconvenience to the transportation of the equipment.

[0004] In order to improve battery life and support high-power loads, multiple batteries are connected in parallel to provide sufficient power output. However, in actual applications, the battery PACK often has uneven charging and discharging due to differences in internal resistance, degree of aging and other factors, which in turn affects the battery life and battery life. In addition, if the ultrasound equipment is left for a long time and is not connected to AC power, during the battery self-discharge process, the difference in battery internal resistance increases as the battery ages. This imbalance will cause the battery self-discharge to accelerate and the capacity to decrease, further affecting the battery life.

[0005] In the prior art, a high-voltage bus power supply is usually used to provide charging power for the battery pack, and the balance between the battery packs is achieved through a charging balance circuit. That is, when powered by an external adapter, each battery pack can be self-balanced through the bus voltage to ensure that the power of each battery pack is relatively balanced. However, the prior art has the following problems: 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 operating stability of the device, but also accelerate the aging of some batteries.

[0006] 2. Battery balancing cannot be performed during the discharge process. In other words, in the existing solution, battery balancing is mainly performed during the charging process. However, in actual equipment operation, balancing is also required during the discharge stage. Due to the different charging and discharging efficiencies of each battery pack, the differences in internal resistance and capacity may lead to uneven current distribution during the discharge process, which ultimately leads to over-discharge of some batteries and under-utilization of some batteries, making it impossible to fully utilize the overall capacity of the battery, thereby affecting the endurance and reliability of the equipment.

[0007] Based on the above problems, the existing technology has obvious deficiencies in battery management, especially the lack of balanced adjustment during the battery discharge phase and the self-balancing capability without an external power supply, which seriously restricts the performance of the ultrasound equipment. Therefore, how to achieve self-balancing between battery packs without adapter power supply, and how to effectively adjust the discharge balance of the battery during the discharge process, have become technical problems that need to be solved. Summary of the invention

[0008] Based on this, the purpose of the present invention is to provide a power management system and method for ultrasonic equipment, so as to fundamentally solve the problem that the existing system cannot achieve discharge balance and cannot self-balance without external adapter power access.

[0009] A power management system for ultrasound equipment according to an embodiment of the present invention includes 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; When the adapter power is not connected, the main control module is used to control the discharge control unit corresponding to the battery whose power is not less than the set threshold range to discharge according to the collected power of each battery, and to control the charging control unit corresponding to the battery whose power is less than the set threshold range to charge, until the power of all batteries is within the set threshold range.

[0010] Another embodiment of the present invention aims to provide a power management method for an ultrasound device, which is applicable to the power management system for an ultrasound device as described above, and the method comprises: The main control module determines whether there is an adapter power supply connected to the power management system; 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 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.

[0011] In addition, a power management method for an ultrasonic device according to the above embodiment of the present invention may also have the following additional technical features: Furthermore, 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.

[0012] Furthermore, 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 includes: 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.

[0013] Furthermore, 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.

[0014] Furthermore, after the step of the main control module outputting a discharge enable signal to a discharge control unit corresponding to a battery whose power level is higher than a set threshold range, the method further includes: 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.

[0015] Furthermore, 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 according to the power demand of the load, and sorts all batteries in descending order according to the power level; 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.

[0016] Furthermore, 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.

[0017] Furthermore, 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 a 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.

[0018] Furthermore, 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 main control module further comprises: 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.

[0019] The power management system for ultrasound equipment provided by the embodiment of the present invention ensures that the power of all battery packs is maintained within a set threshold range by adjusting the charge and discharge state of the battery pack in real time, avoids overcharging or over-discharging, and prolongs the service life of the battery; through the design of the dynamic balancing module, the battery can be self-balanced without an external power supply, ensuring the battery consistency and stability after the equipment has been running for a long time; by setting a power conversion unit and a balancing unit in the discharge balancing module, the output current of each battery pack can be adjusted during the discharge process to ensure that each battery pack is discharged together, thereby achieving battery balancing during the discharge process, avoiding the situation where individual batteries are over-discharged or under-utilized, and improving the energy efficiency and endurance of the overall battery pack; through dynamic balancing and discharge balancing technology, 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 load, avoiding the problem of insufficient system power supply caused by uneven battery power, thereby improving the endurance and overall performance of the equipment; and solves the problem that the existing system cannot achieve discharge balancing and cannot self-balance without external adapter power access. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of modules of a power management system for ultrasound equipment in a first embodiment of the present invention; Figure 2 It is a schematic structural diagram of a power management system for ultrasonic equipment in a first embodiment of the present invention; Figure 3 It is a structural schematic diagram of a dynamic balancing module in a power management system for ultrasonic equipment in the first embodiment of the present invention; Figure 4 It is a structural diagram of a main control module, a discharge selection module and a load in a power management system for ultrasonic equipment in the first embodiment of the present invention; Figure 5 is a flow chart of a power management method for ultrasonic equipment in a second embodiment of the present invention; The following specific implementations will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0021] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Several embodiments of the present invention are given 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, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0022] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention 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.

[0024] Embodiment 1 See also Figure 1 , which shows a power management system for ultrasound equipment in a first embodiment of the present invention. For ease of description, only the parts related to the embodiment of the present invention are shown. The power management system for ultrasound equipment provided by the embodiment of the present invention includes a main control module, and a charging selection module, a dynamic balancing module, a discharging selection module and a load, all of which are 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; When the adapter power is not connected, the main control module is used to control the discharge control unit corresponding to the battery whose power is not less than the set threshold range to discharge according to the collected power of each battery, and to control the charging control unit corresponding to the battery whose power is less than the set threshold range to charge, until the power of all batteries is within the set threshold range.

[0025] In one embodiment of the present invention, the power management system is applied to an ultrasonic device, wherein the ultrasonic device adopts a dual power supply mode, namely an adapter power supply and a battery bus power supply, wherein the ultrasonic device generally includes an ultrasonic probe or a transducer, which is used to convert electrical signals into mechanical waves (ultrasound), or to convert reflected ultrasonic signals back into electrical signals, wherein in order to generate sufficiently strong ultrasonic waves, especially when performing detection or treatment in deeper tissues, a high-power driving signal is required, and therefore the ultrasonic device requires high-power driving during ultrasonic scanning. Of course, it is understandable that other components of the ultrasonic device also have high-power requirements, which are determined based on actual needs and are not specifically limited here.

[0026] Further, in one embodiment of the present invention, referring 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 balancing module, the output of the charging selection module is connected to the input of the dynamic balancing 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 balancing module for charging according to the control of the main control module, wherein 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 tubes and a first controller. Specifically, the gates of the two MOS tubes are connected to the first controller, the drains of the two MOS tubes are connected to the dynamic balancing module, the source of one MOS tube is connected to the accessible adapter power supply, and the source of the other MOS tube is connected to the battery bus power supply output by the dynamic balancing module, wherein the first controller is connected to the charging selection control signal terminal (CHG_BUS_EN) of the main control module. At this time, the pair of back-to-back MOS tubes in the charging selection module and the first controller form an ideal diode circuit, wherein the main function of the ideal diode circuit is to automatically select a path with a higher voltage between different power supplies to achieve unidirectional conduction of the current, and no energy loss or heat is generated when the current passes through, thereby achieving the optimal charging path selection, and avoiding 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 balancing module for charging, wherein it should be pointed out that the battery bus power supply voltage is usually set lower than the adapter power supply voltage. It should be pointed out that in other embodiments of the present invention, the charging selection module may also use other components to achieve lossless automatic selection of the power path, which is not 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, wherein when the first control signal is an enable signal (that is, CHG_BUS_EN is at a high level), the first controller drives the charging selection module to enable it to work, and the charging selection module will automatically select the larger voltage between the adapter power supply and the battery bus power supply, and provide it as the charging bus power (CHG_BUS) to the dynamic balancing module, that is, when the ultrasonic device is externally connected to the adapter power supply, the charging selection module outputs the adapter power supply (as the charging bus power) to the dynamic balancing module; when the ultrasonic device is not connected to the adapter power supply, the charging selection module outputs the battery bus power supply (as the charging bus power) to the dynamic balancing module.When the first control signal is a disable signal (i.e., CHG_BUS_EN is at a low level), the charging selection module is disabled, the charging selection module is disconnected, and the output voltage to the dynamic balancing module is stopped. At this time, the charging bus voltage (CHG_BUS) is 0V, so the dynamic balancing module will not be charged. It is mainly suitable for stopping charging after the adapter power supply fully charges each battery pack in the dynamic balancing module. It should be pointed out that the connection between the main control module and the charging selection module is mainly used to control the working state of the charging selection module.

[0027] Furthermore, in one 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 balancing module, the output of the discharge selection module is connected to the load discharge control module in the load, and 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 tubes and a second controller. Specifically, the gates of the two MOS tubes are connected to the second controller, and the drains of the two MOS tubes are connected to the main control module and the load discharge control module in the load. The source of one MOS tube is connected to the accessible adapter power supply (AC_BUS), and the source of the other MOS tube is connected to the battery bus power supply (BAT_BUS) output by the dynamic balancing module. The second controller controls the two MOS tubes 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; and 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 pointed out that in other embodiments of the present invention, the discharge selection module can also use other components to achieve lossless automatic selection of the power path, which is not specifically limited here. At the same time, it should be pointed out that the output of the discharge selection module is also connected to the power conversion unit in the main control module, wherein the power conversion unit takes the discharge bus power output by the discharge selection module as 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, wherein the power supply is always on, and when the system is not connected to the adapter power supply and is not turned on, the discharge bus power output by the battery bus power supply is converted by the power conversion unit to provide power to the main control unit, so that the main control unit can work constantly. It should be pointed out that the connection between the main control module and the discharge selection module is mainly used to provide power supply according to the discharge bus power output by the discharge selection module.

[0028] Furthermore, in one embodiment of the present invention, the dynamic balancing module includes a plurality of battery groups consisting of a plurality of batteries connected in parallel, a charging balancing module, and a discharging balancing module. Each battery group is connected to the charging selection module through the charging balancing module, and is connected to the discharging selection module through the discharging balancing module. Specifically, in the embodiment of the present invention, in order to reduce the difficulty of the structural design of the ultrasonic equipment and to realize the normal air transportation of the ultrasonic equipment, the batteries in the dynamic balancing module are set as a plurality of battery groups, and each battery group has a plurality of batteries connected in parallel, referring to Figure 2 and Figure 3 As shown, the dynamic balancing module is provided with m battery groups, each battery group is connected in parallel with n batteries. Figure 2 M1_PACK1 in the figure 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 one embodiment of the present invention, each battery is equipped with an independent BMS system (battery management system), which is responsible for managing the temperature monitoring, battery status evaluation and other functions of the battery connected to it. Each BMS system can communicate bidirectionally with the input and output terminals (I / O) in the main control unit in the main control module through a communication interface (such as I2C, SPI, CAN, etc.) to transmit the status data of each battery (such as battery voltage, current, temperature, charge and discharge status, etc.) to the main control unit, so that the main control unit can uniformly manage and coordinate each battery through the status data of each battery to ensure the safety and efficient operation of the system. Therefore, by connecting multiple batteries in parallel, not only can the load be shared, 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 of the battery. At the same time, in the parallel structure, if a 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. Furthermore, by performing real-time charge and discharge control and balancing management on each battery, it is ensured that the load of each battery is relatively balanced, avoiding excessive discharge or charging of some batteries, extending battery life and improving the reliability of the entire system.

[0029] Further, the charging equalization module includes each charging control unit connected to each battery input and charging selection module, wherein reference Figure 2 and Figure 3 As shown, the dynamic balancing module is provided with m battery groups, each battery group is connected in parallel with n batteries, and each battery is connected to a corresponding charging control unit. Figure 2 M1_CHARGE1 in represents the charging control unit corresponding to the first battery (M1_PACK1) in the first battery pack, and so on. Furthermore, each charging control unit is also connected to each charging control signal terminal (M_CHG_EN) of the main control module, specifically, the charging control unit (M1_CHARGE1) corresponding to the first battery (M1_PACK1) in the first battery pack is connected to the first charging 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 charging control unit, thereby regulating and controlling the charging operation of each battery. For example, when the second control signal output by the first charging control signal terminal (M1_CHG1_EN) of the main control module to the charging control unit (M1_CHARGE1) corresponding to the first battery (M1_PACK1) in the first battery pack is an enable signal (that is, M1_CHG1_EN is at a high level), the charging control unit is enabled to work and start the charging operation of the battery. Among them, the charging control unit is responsible for regulating the charging process of each battery, and usually requires precise control of the charging current and voltage. The devices commonly used include MOS tubes, DC-DC converter chips, charging management ICs, current sensors / Hall sensors, and overvoltage protection and overcurrent protection circuits, wherein the MOS tube 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 which the common ones are boost, buck, and buck-boost converter chips. The charging 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 the battery from overvoltage and overcurrent charging to protect the battery safety. It should be pointed out that in a specific embodiment of the present invention, it can use more or less of the above-mentioned devices to implement the charging operation of the charging control unit, which is set according to actual use needs, and the device setting of the charging control unit is not specifically limited here.

[0030] Further, the discharge balancing module includes each discharge control unit connected to each battery output, multiple power conversion units connected to each discharge control unit 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 multiple discharge control units; wherein the discharge control unit includes a pair of back-to-back MOS tubes, specifically, the source of one MOS tube is connected to the battery, the source of the other MOS tube is connected to the power conversion unit, the gates of the two MOS tubes are connected to the discharge control signal terminal (M_DSG_EN) of the main control module, and the drains of the two MOS tubes are connected to each other, specifically, the discharge control unit corresponding to the first battery (M1_PACK1) in the first battery group 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 to enable or disable the discharge of each battery to the discharge control unit, thereby adjusting and controlling the discharge operation of each battery, and at the same time, the battery voltage output by its discharge control unit is used as the input of the power conversion unit. For example, when the third control signal of the discharge control unit corresponding to the first battery (M1_PACK1) in the first battery pack (M1_DSG1_EN) output by the first discharge control signal terminal (M1_DSG1_EN) of the main control module is an enable signal (that is, M1_DSG1_EN is at a high level), the discharge control unit is enabled to work and start the discharge process of the battery. Each battery pack is connected to a power conversion unit through its multiple discharge control units, that is, referring to the aforementioned discharge control units corresponding to the n batteries in the first battery pack are connected to a power conversion unit, and the discharge control units corresponding to the n batteries in the second battery pack are connected to another power conversion unit, and so on. It should be pointed out that in other embodiments of the present invention, the discharge control unit may also use other components to control whether the battery voltage output by the battery is output to the power conversion unit, which is not specifically limited here.

[0031] Furthermore, 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 uniform battery bus voltage to provide the voltage required by the load and ensure 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., where BUCK is a buck conversion, which is suitable for converting a higher voltage to a lower voltage. BOOST is a boost conversion, which is suitable for boosting a lower voltage to a higher voltage. BUCK-BOOST can both boost and buck, and adapt to the situation of input voltage changes. CUK, SEPIC, flyback, etc. are other types of voltage conversion methods, and specific applications are selected according to design requirements. The devices commonly used in the power conversion unit include DC-DC converter chips, MOS tubes or IGBTs, inductors and capacitors, diodes (such as Schottky diodes), and controller ICs. The DC-DC converter chip is mainly responsible for voltage boost, buck, or boost / lower voltage. MOS tubes or IGBTs are power switch tubes used to control high current switching conversions, among which SFETs are often used in low voltage applications, while IGBTs are more suitable for high voltage and high power applications. Inductors and capacitors are used for filtering to ensure smooth and stable output voltages, among which inductors and capacitors are key passive components of DC-DC circuits, used for energy storage and output smoothing. Diodes (such as Schottky diodes) are used for fast, low-loss rectification in power conversion, reducing power loss and improving conversion efficiency. Controller ICs are used to manage the timing, feedback, and adjustment of power conversion, usually including PWM (pulse width modulation) control functions. It should be pointed out that in a specific embodiment of the present invention, it can use more or less of the above-mentioned devices to implement the voltage conversion operation of the power conversion unit, which is set according to actual use needs, and the device settings of the power conversion unit are not specifically limited here.

[0032] Furthermore, the balancing unit is connected to each power conversion unit, for details, refer to Figure 2 and Figure 3As shown, it includes multiple balancing units, and each balancing unit is connected to two adjacent power conversion units. It should be pointed out that in other embodiments of the present invention, it can also be set to connect a balancing unit to all power conversion units, which is set according to actual use needs and is not specifically limited here. The balancing unit is responsible for managing the balance of power between each battery to ensure that the discharge state of each battery remains consistent. The specific power conversion circuit monitors the current output during the battery discharge process in real time, and the sampled current data will be transmitted to the balancing unit. The balancing unit understands the discharge status of each battery through the current data and determines whether the current of each battery is balanced. If the current output of a battery is large and 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 be consistent. That is, if the current output of a battery is large, the balancing unit will adjust the power conversion unit through the current feedback data, reduce the current output of the battery, or increase the current output of other batteries, until the current of each battery is balanced, ensuring the current balance between different batteries. At this time, the current output by each power conversion unit is the same, thereby achieving battery discharge balancing. At this time, the voltage output by the discharge balancing module is the battery bus voltage, and the current output by the discharge balancing module is the sum of the currents output by each power conversion unit, thereby ensuring that all batteries can contribute current evenly, avoiding overload of a single battery, making full use of the discharge capacity of each battery, and improving the overall discharge rate and efficiency. For example, assuming that the load requires a total current output of 20A, if there are 4 battery packs in parallel, the current output of each battery pack is 5A. Therefore, by connecting multiple battery packs in parallel, a larger instantaneous current can be provided to meet the needs 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, wherein passive balancing devices generally include resistors and inductors, which are used to dissipate excess energy through resistors or inductors to achieve the purpose of battery voltage balancing. Active balancing devices usually include MOS tubes, capacitors, and DC-DC converters, wherein MOS tubes are used to switch and control the energy transfer between batteries, capacitors are used to temporarily store energy and transfer it to other batteries, DC-DC converters are used to transfer electricity from a battery pack with a higher voltage to a battery pack with a lower voltage, battery balancing ICs are used for battery balancing management, and current sampling resistors / Hall sensors are used to monitor the current between batteries to ensure that the balancing process is carried out accurately. It should be pointed out that in a specific embodiment of the present invention, more or less of the above-mentioned devices can be used to implement the discharge balancing operation of the balancing unit, which is set according to actual use needs, and the device settings of the balancing unit are not specifically limited here.

[0033] Further, in one embodiment of the present invention, referring to Figure 2 and Figure 4 As shown, the load includes a load discharge control module and a subsequent circuit, wherein the load discharge control module is respectively connected to the output of the discharge selection module, the main control module and the subsequent circuit, and specifically the load discharge control module is connected to the load discharge control signal end (PWR_EN) of the main control module, at which time the load discharge control signal end (PWR_EN) of the main control module can output a fourth control signal for enabling or disabling the power supply of the subsequent circuit to the load discharge control module, wherein when the fourth control signal is an enable signal (that is, PWR_EN is at a high level), the load discharge control module is enabled to work, and the load discharge control module will connect the discharge selection module and the subsequent circuit, and the discharge bus electricity provided by the discharge selection module will supply power to the subsequent circuit; and when the fourth control signal is a disable signal (that is, PWR_EN is at a low level), the load discharge control module is disabled, the load discharge control module is disconnected, and the output of the discharge bus electricity to the subsequent circuit is stopped, so as to achieve low power consumption and thus extend the service life of the battery.

[0034] Further, in one embodiment of the present invention, referring to Figure 2 and Figure 4As shown, the main control module is respectively connected to the control end of the above-mentioned charging selection module, the output of the discharging selection module, the load discharging control module in the load, and each battery, charging control unit and discharging control unit in the dynamic balancing module. At this time, the output of the discharging selection module is connected to the power conversion unit in the main control module, so that the discharge bus electricity output by the discharging selection module is converted by the power conversion unit to provide power to the main control unit, so that the main control unit can work constantly. The control end of the charging selection module is connected to the charging selection control signal end (CHG_BUS_EN) of the main control unit in the main control module, and is used to determine whether to output the charging bus electricity to the dynamic balancing module for charging according to the first control signal output by the charging selection control signal end (CHG_BUS_EN) of the main control unit. The load discharging control module in the load is connected to the load discharging control signal end (PWR_EN) of the main control unit in the main control module, and is used to determine whether to output the discharge bus electricity output by the discharging selection module to the subsequent circuit for power supply according to the fourth control signal output by the load discharging control signal end (PWR_EN) of the main control unit. Each battery uses the equipped BMS system to communicate with the input and output terminals (I / O) of the main control unit in the main control module, so that the input and output terminals (I / O) of the main control unit can obtain the status 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 electricity 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.

[0035] Furthermore, the main control module can also control the operation of each module unit to achieve power management of the ultrasonic device. Specifically, when the adapter power is not connected, the main control module is used to control the discharge control unit corresponding to the battery whose power is not less than the set threshold range to discharge according to the collected power of each battery, and control the charging control unit corresponding to the battery whose power is less than the set threshold range to charge, until the power of all batteries is within the set threshold range. It should be pointed out that the main control module can also perform other more specific power management operations. The specific implementation principle and technical effects produced can refer to the power management method in the subsequent second embodiment. For the sake of brief description, the parts not mentioned in the embodiment of the present invention can refer to the corresponding content in the subsequent second embodiment.

[0036] In the embodiment of the present invention, by adjusting the charge and discharge state of the battery pack in real time, it is ensured that the power of all battery packs is maintained within the set threshold range, overcharging or over-discharging is avoided, and the service life of the battery is extended; by designing a dynamic balancing module, the battery can be self-balanced without an external power supply, thereby ensuring the battery consistency and stability after the device has been running for a long time; by setting a power conversion unit and a balancing unit in the discharge balancing module, the output current of each battery pack can be adjusted during the discharge process, ensuring that each battery pack is discharged together, achieving battery balancing during the discharge process, avoiding excessive discharge or underutilization of individual batteries, and improving the energy efficiency and endurance of the overall battery pack; by dynamic balancing and discharge balancing technology, 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 load, 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 problem that the existing system cannot achieve discharge balancing and cannot self-balance without external adapter power access.

[0037] Embodiment 2 See also Figure 5 , which shows a power management method for an ultrasonic device in a second embodiment of the present invention. For the sake of convenience, only the part related to the embodiment of the present invention is shown. The power management method for an ultrasonic device provided by the embodiment of the present invention is applicable to the power management system for an ultrasonic device provided by the first embodiment above, and the method includes: Step S10, the main control module determines whether there is an adapter power supply connected to the power management system; Specifically, in one embodiment of the present invention, the power management method is applied to ultrasound equipment and is applicable to the power management system described in the first embodiment, aiming to effectively manage the charging and discharging process of multiple battery packs within the power management system, ensure that the battery packs are charged evenly during use, and improve the efficiency and life of the batteries. When the power management system is started, the main control module first determines whether there is an external adapter power supply connected by detecting the voltage signal of the adapter power interface.

[0038] Among them, the adapter power interface usually sends its status to the main control module through the adapter in-place signal (usually a voltage signal). The signal has two possible voltage states: pulling up the voltage and pulling down the voltage. Specifically, when the adapter power is connected, the power interface may pull up the signal (for example, 5V or 3.3V) through a certain circuit, 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 (for example, 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 in-place signal in the adapter power interface. If the adapter in-place signal is in a high state, the main control module determines that the adapter power is connected to the power management system. If the adapter in-place signal is in a low 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 the adapter power is connected to the power management system, step S20 is executed, otherwise step S30 is executed.

[0039] Step S20, the main control module outputs a charge selection enable signal to the charge selection module, outputs a charge enable signal to the charge control units corresponding to all batteries, and outputs a discharge disable signal to the discharge control units corresponding to all batteries; Among them, in one embodiment of the present invention, when the main control module determines that the adapter power supply is connected to the power management system, the main control module outputs a charge selection enable signal to the charge selection module, outputs a charge enable signal to the charge control units corresponding to all batteries, and outputs a discharge disable signal to the discharge control units corresponding to all batteries, so that all batteries are charged by the adapter power supply. Specifically, first, the main control module outputs a charge selection enable signal to the charge selection module, allowing the adapter power supply to charge the battery pack, activating the charging process, so that the charge selection module outputs the adapter power supply to each charging control unit according to the charge selection enable signal. Then the main control module outputs a charge enable signal to the charging control unit corresponding to each battery, so that the adapter power supply 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 battery from discharging to the load, thereby preventing each battery from discharging to the load at the same time during the charging process and causing unnecessary battery loss, and ensuring that no battery discharges to the load during charging to optimize the charging efficiency. Correspondingly, at this time, the adapter power supply can power 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 the load discharge enable signal to the load discharge control module. At this time, the adapter power supply directly powers the subsequent circuits in the load.

[0040] Furthermore, in one embodiment of the present invention, this step 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.

[0041] 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; 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.

[0042] 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.

[0043] 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; 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.

[0044] Step S50, the main control module outputs a charge selection enable signal to the charge selection module, outputs a discharge enable signal to a discharge control unit corresponding to a battery whose charge is not less than a set threshold range, and outputs a charge enable signal to a charge control unit corresponding to a battery whose charge is less than a set threshold range; Among them, in one embodiment of the present invention, if there is a battery whose power is not within the set threshold range, it means that there is a power difference between the batteries, and power balancing processing is required. At this time, the main control module outputs a charging selection enable signal to the charging selection module, and outputs a discharge enable signal to the discharge control unit corresponding to the battery whose power is not less than the set threshold range, so that the battery bus power supply is powered by the battery whose power is not less 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 whose power is less than the set threshold range, so that the battery bus power supply is used to charge each battery whose power is less than the set threshold range, so that the power of each battery reaches the set threshold range, thereby realizing self-balancing of battery charging. Therefore, in the case of unbalanced battery power and no external adapter power supply, the main control module controls the charging control unit and the discharging control unit in the dynamic balancing module to perform energy regulation between battery groups, so that the battery with high power is discharged to charge the battery with low power, until the power of all battery groups is within the set threshold range, ensuring that the load is continuously and stably supplied with power, and at the same time, the power conversion unit and the balancing unit in the dynamic balancing module realize balanced discharge between battery groups. At this time, the main control module dynamically monitors the battery power status and adjusts the charging and discharging strategy in real time to ensure that the battery is in an efficient operating state, extend the battery life and guarantee the power supply needs of the load.

[0045] Furthermore, 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 includes: 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.

[0046] Specifically, the main control module obtains 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 to the total number of batteries. The main control module then 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 main control module gives priority to 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 main control module will relax the conditions and select batteries with power not lower than the set threshold range for discharge to ensure sufficient power supply. It should be pointed out that the main control module preferentially selects batteries with power higher than the set threshold range for discharging, specifically selects batteries with power higher than the upper limit of the set threshold range for discharging, and selects batteries with power not lower than the set threshold range for discharging, specifically selects batteries with power higher than the lower limit of the set threshold range for discharging. In the above process, the dynamic balancing module continues to participate in the adjustment, and ensures that batteries with power not lower than the set threshold range participate in the discharge through the coordination of charging and discharging strategies. At the same time, the dynamic balancing module supplements the batteries with power lower than the set threshold range, and gradually adjusts 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 is unevenly distributed, so as to make the system run smoothly, and at the same time avoid excessive discharge of the battery to ensure the battery life.

[0047] Among them, it should be pointed out that, since the main control module enables the battery with high power to charge the battery with low power, its load also needs corresponding power supply, so that the power of the currently discharged battery is consumed accordingly. Therefore, in the embodiment of the present invention, the above steps of determining the set threshold range according to the power of each battery need to be repeated at preset time intervals, so that all batteries are finally dynamically adjusted to be within a consistent set threshold range, so that all batteries can be discharged synchronously.

[0048] At the same time, it should be pointed out that when the power management system starts to start, when the power level of one or more batteries is too high, while the power levels of most other batteries are roughly the same, then according to the calculation and processing method of setting the threshold range as described above, the set threshold range may be higher than the normal value, so that only these batteries with too high power levels are discharged, while most other batteries with average power levels are still charged at the same time. If only one or a few batteries are discharged at this time, and the load demand is large, these batteries may not be able to provide enough power to simultaneously meet the load power supply and the charging of other batteries, resulting in insufficient power supply. Therefore, in order to solve the above technical problems, in one embodiment of the present invention, the above-mentioned main control module determines whether the power level of each battery is within the set threshold range based on the collected power level of each battery, and the steps include: 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.

[0049] Specifically, the main control module obtains the real-time power data of each battery, and calculates the initially set power threshold range according to the threshold setting method described above, and then the main control module calculates the proportion of the number of batteries whose power is not less than the initially set power threshold range, and compares the current battery quantity proportion with the second preset proportion. When the comparison shows that the battery quantity proportion is higher than the second preset proportion, the main control module directly determines whether the power of each battery is within the initially set power threshold range; wherein when the comparison shows that the battery quantity proportion is lower than the second preset proportion, the main control module dynamically adjusts the upper and lower limits of the threshold range, specifically, lowers the lower and middle limits of the power threshold range, so as to increase the number of batteries that are not less than the initially set power threshold range, and at this time the main control module continuously adjusts the threshold range until the preset battery quantity proportion requirement is met. wherein after dynamically adjusting the threshold range, the main control module again determines which batteries have power within the new set threshold range. and calculates the adjusted battery quantity proportion to determine whether it reaches the second preset proportion. If so, the main control module determines whether the power of each battery is within the set threshold range after dynamic adjustment based on the collected power of each battery, and executes the specific steps in the above steps S40 and S50. At this time, the main control module controls the discharge of batteries with high power to charge batteries with low power, and the proportion of batteries that are not lower than the set threshold range gradually increases until the power of all batteries is within the set threshold range.

[0050] Furthermore, in one embodiment of the present invention, after the step of the main control module outputting a discharge enable signal to a discharge control unit corresponding to a battery whose power level is higher than a set threshold range, the method further includes: 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.

[0051] Specifically, the main control module can monitor the power demand of the load in real time through the current sensor and the voltage sensor, or predict the power demand of the load when starting based on historical data or a preset starting current curve. Or if the load is controlled by an external device or system (such as starting certain modes of an ultrasonic device), the main control module can obtain the power demand information of the load through external instructions. When the main control module monitors the power demand of the load, it 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. Specifically, the main control module also monitors the power output of the battery pack that is currently discharging, where the output power of each battery can be calculated by real-time monitoring of the battery voltage and current. The main control module accumulates the output power of all currently discharging batteries to obtain the total battery output power. At the same time, the main control module also monitors the power absorption of the battery that is currently charging. At this time, the power output to the load is determined based on the total battery output power and the power used for charging, and then it is determined whether the power demand of the load is met. If so, the current state is maintained without any operation. If not, it means that the current battery power output 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.

[0052] Furthermore, 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 according to the power demand of the load, and sorts all batteries in descending order according to the power level; 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.

[0053] Specifically, the main control module calculates the target number of batteries that need to be discharged based on the power demand of the load, the output power capacity of each battery, and the power demand of the battery currently being charged. At the same time, after collecting the battery power information, the main control module sorts the batteries in descending order by power level. At this time, batteries with higher power levels are preferentially discharged to ensure that the system can provide stable power for a longer period of time and avoid excessive discharge of the batteries. After the target number of batteries and battery power levels are sorted, the main control module needs to select other target batteries that actually need to be discharged based on the above information, and give priority to batteries whose power levels are within the set threshold range, while ensuring that the calculated target number of batteries is met.

[0054] Further, more specifically, the step of outputting the discharge enable signal to the discharge control unit corresponding to the 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.

[0055] Specifically, the main control module first monitors in real time and determines whether there are any batteries with power levels lower than the set threshold range among other target batteries. When the main control module does not detect that the battery power level is lower than the set threshold range, it directly outputs a discharge enable signal to the discharge control units corresponding to other target batteries. At this time, all batteries that are being discharged are batteries with power levels not lower than the set threshold range, and batteries with power levels lower than the set threshold range can also continue to be charged. When the main control module detects that the power level of one or some batteries is lower than the set threshold range, it sends a charge disable signal to the charge control unit corresponding to the battery with power levels lower than the set threshold range to immediately stop the battery charging operation; at the same time, it also outputs a discharge enable signal to the discharge control units corresponding to other target batteries with power levels lower than the set threshold range, so that other target batteries with power levels lower than the set threshold range can still perform discharge operations to primarily meet the power requirements of the load.

[0056] In one embodiment of the present invention, 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 a 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.

[0057] Specifically, the main control module monitors the temperature of each battery in real time to determine whether any battery temperature exceeds a preset safety threshold. If it is detected that the abnormal battery temperature is higher than the preset value, 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 charging disable signal to stop charging to prevent the temperature from rising further. When the battery temperature returns to within the safety threshold, the main control module re-outputs the discharge or charging enable signal to allow the battery to resume normal operation. When the battery temperature continues to be too high, the main control module can also trigger an alarm or more stringent protection measures.

[0058] In one embodiment of the present invention, 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.

[0059] 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 that the adapter power supply is connected, 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 supplies power to the load. If the adapter power supply is connected, the adapter power supply is preferentially selected to supply power to the load. If the adapter is not connected, the load is powered from the battery bus power supply. When the device is turned 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 load discharge control module cuts off the power supply path between the subsequent circuit and the discharge selection module to avoid battery power loss. In this way, the power management system can manage the power of the load in different states, ensuring that the load can be powered normally when it is turned on, and avoiding the waste of battery power when it is turned off.

[0060] In summary, the power management method for ultrasonic equipment in the above-mentioned embodiments of the present invention, in the absence of an adapter power supply, realizes battery self-balancing through power balance management between batteries, reduces battery power differences, and effectively extends the overall service life of the battery pack; by monitoring and balancing the power of the battery during the discharge process, the problem of over-discharge of some batteries is avoided, so that the battery pack can work more efficiently and improve the endurance and stability of the equipment; by balancing the battery during the charge and discharge process, the performance degradation caused by battery aging is reduced, and the service life of the battery is effectively extended, especially for equipment that has not been used for a long time, the battery can also be kept in a good state; by monitoring and balancing the battery during the discharge process, the battery can be kept in a good state, and the battery can be kept in a good state. By measuring the power demand of the load and dynamically adjusting the discharge sequence and power distribution of the battery pack, the high-power load demand of the ultrasonic equipment can be effectively met to ensure the continuity and stability of the power supply. By real-time monitoring of the battery temperature, the battery charging and discharging status can be controlled in time when the temperature is abnormal to avoid safety risks caused by battery overheating, thereby improving the safety and reliability of the system. By introducing a dynamic threshold adjustment mechanism in the battery management process and dynamically adjusting the balancing management strategy according to the battery power status, the flexibility and intelligence of battery management can be ensured, so that the operating efficiency of the battery pack is optimized. This solves the problem that the existing system cannot achieve discharge balancing and cannot achieve self-balancing without external adapter power access.

[0061] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0062] The above-described embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A power management system for ultrasonic equipment, characterized in that: It includes 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 groups consisting of a plurality of batteries connected in parallel, a charging balancing module connected to each battery input and a charging selection module respectively, and a discharging balancing module connected to each battery output and a 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; When the adapter power is not connected, the main control module is used to control the discharge control unit corresponding to the battery whose power is not less than the set threshold range to discharge according to the collected power of each battery, and to control the charging control unit corresponding to the battery whose power is less than the set threshold range to charge, until the power of all batteries is within the set threshold range.

2. A power management method for ultrasonic equipment, characterized in that: The power management system for ultrasound equipment according to claim 1, wherein the method comprises: The main control module determines whether there is an adapter power supply connected to the power management system; 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 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.

3. The power management method for ultrasonic equipment according to claim 2, 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.

4. The power management method for ultrasonic equipment according to claim 2, 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.

5. The power management method for ultrasonic equipment according to claim 2, 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.

6. The power management method for ultrasonic equipment according to claim 4, 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.

7. The power management method for ultrasonic equipment according to claim 6, 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 according to the power demand of the load, and sorts all batteries in descending order according to the power level; 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.

8. The power management method for ultrasonic equipment according to claim 7, 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.

9. The power management method for ultrasonic equipment according to claim 2, 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 a 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.

10. The power management method for ultrasonic equipment according to claim 2, 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 main control module further comprises: 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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