WO2020102942A1 - 一种供电装置和超声台车 - Google Patents

一种供电装置和超声台车

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Publication number
WO2020102942A1
WO2020102942A1 PCT/CN2018/116218 CN2018116218W WO2020102942A1 WO 2020102942 A1 WO2020102942 A1 WO 2020102942A1 CN 2018116218 W CN2018116218 W CN 2018116218W WO 2020102942 A1 WO2020102942 A1 WO 2020102942A1
Authority
WO
WIPO (PCT)
Prior art keywords
power supply
current
converter
power
battery
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2018/116218
Other languages
English (en)
French (fr)
Inventor
张皖
朱思君
胡锐
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Mindray Bio Medical Electronics Co Ltd
Original Assignee
Shenzhen Mindray Bio Medical Electronics Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenzhen Mindray Bio Medical Electronics Co Ltd filed Critical Shenzhen Mindray Bio Medical Electronics Co Ltd
Priority to CN201880097226.4A priority Critical patent/CN112655145B/zh
Priority to PCT/CN2018/116218 priority patent/WO2020102942A1/zh
Publication of WO2020102942A1 publication Critical patent/WO2020102942A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of DC power input into DC power output
    • H02M3/02—Conversion of DC power input into DC power output without intermediate conversion into AC
    • H02M3/04—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters
    • H02M3/10—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
    • H02M3/158—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load

Definitions

  • the invention relates to a power supply device and an ultrasonic trolley.
  • Portable ultrasound (main unit) is mainly used for POC (Point Of Care), anesthesia and physiotherapy, which requires that the portable ultrasound main unit is not only light and thin and portable, but also has a long battery life.
  • POC Point Of Care
  • physiotherapy which requires that the portable ultrasound main unit is not only light and thin and portable, but also has a long battery life.
  • one application scenario of the portable ultrasound host is to charge and work on the ultrasound table.
  • the main functions of the ultrasonic trolley are: the expansion function of the host probe, the AC auxiliary output function, and the power supply function to increase the endurance of the portable ultrasonic host.
  • the technical principle of the ultrasonic trolley supplying power to the portable ultrasonic host is shown in Figure 1.
  • Multiple parallel power supply circuits are arranged in the ultrasonic trolley and connected to the voltage converter, which converts the input voltage into the portable ultrasonic host. Voltage; each power supply circuit uses a battery and powers the voltage converter through a diode.
  • the AC-DC circuit AC-DC
  • AC-DC can convert the AC power input through the external power grid into DC power and power the voltage converter through a diode
  • the DC power output from the AC-DC circuit (AC-DC) can also be passed through for each battery. Independently equipped charger to charge the battery.
  • the existing battery-powered systems have relatively low life and reliability. Because the batteries are discharged in parallel through the diodes D1 ⁇ Dn, the discharge current of the battery depends on the battery voltage, and because the power, voltage and internal resistance of each battery are usually different, so the circuit is a higher voltage battery Leading the power supply for the voltage converter. For each battery, the discharge current is uneven. Some batteries are in a long-term over-discharge state, and some batteries cannot be powered for a long time. The utilization rate of the battery system is low, and the battery life of the ultrasonic trolley is short The batteries that have been powered for a long time have a low life due to the large current of the whole machine, and the system reliability is reduced.
  • the present invention mainly provides a power supply device and an ultrasonic trolley.
  • An embodiment provides the first power supply device, which includes multiple parallel power supply components:
  • the first power supply component of the multi-channel parallel power supply component includes a first battery connected in series, a first voltage converter, and a current sampler; the first voltage converter is used to transform the input DC voltage to output a preset DC current of the voltage, the current sampler is used to sample the DC power output by the first voltage converter to obtain a sampling current;
  • the second power supply component of the multi-channel parallel power supply component includes a second battery and a second current converter connected in series, and a control end of the second current converter is connected to the current sampler for connecting the input and The output DC power is converted into DC power having the same magnitude as the sampling current.
  • the first power supply component of the multi-channel parallel power supply component includes a first battery and a first voltage converter connected in series; the first voltage converter is used to transform the input DC power to output DC power with a preset voltage;
  • the second power supply component of the multi-channel parallel power supply component includes a second battery in series, a second current converter, and a current sampler; the current sampler is used to sample the DC power output by the second current converter To obtain the sampling current; the current sampler is also connected to the control terminal of the first voltage converter, so that the first voltage converter controls the input and output DC power according to the sampling current.
  • the third power supply component of the multiple parallel power supply components includes a third battery and a third current converter connected in series, and a control end of the third current converter is connected to the current sampler, It is used to convert the input and output DC power into DC power with the same magnitude as the sampling current.
  • control terminal of the second current converter is connected to the current sampler.
  • the current sampler further includes a current amplifier for amplifying the sampled current before outputting.
  • the power supply device further includes an AC-DC converter for connecting to the AC power grid to convert the AC power input by the AC power grid into DC power and output it.
  • the first power supply component further includes a first charger for converting the DC power output by the AC-DC converter into DC power suitable for charging the first battery; the second power supply component It also includes a second charger for converting the DC power output by the AC-DC converter into DC power suitable for charging the second battery.
  • the third power supply component further includes a third charger for converting the DC power output by the AC-DC converter into DC power suitable for charging the third battery.
  • the output terminal of the AC-DC converter is also connected to the input terminal of the first voltage converter; and / or, the output terminal of the AC-DC converter is also connected to the second current converter Input connection.
  • the power supply device further includes a battery compartment for placing the first battery and the second battery.
  • an embodiment provides an ultrasound trolley, including the power supply device according to any one of the above embodiments.
  • the power supply device and the ultrasonic trolley include multiple parallel power supply components.
  • One power supply component sets the power supply voltage to the load through the voltage converter, and the other power supply components use the current converter to realize the battery
  • the discharge current is equal, so that the battery discharge does not depend on the battery power, which solves the problem of unbalanced power supply of the ultrasonic trolley and improves the reliability of the power supply system.
  • FIG. 1 is a circuit principle circuit of a power supply system for an ultrasonic trolley to power a portable ultrasonic host;
  • FIG. 2 is a schematic structural diagram of an ultrasonic trolley according to an embodiment
  • FIG. 3 is a schematic circuit diagram of a power supply device including two power supply components according to an embodiment
  • FIG. 4 is a schematic circuit diagram of an embodiment of a power supply device including more than two power supply components
  • FIG. 5 is another schematic circuit diagram of a power supply device including two power supply components according to an embodiment
  • FIG. 6 is another schematic circuit diagram of an embodiment of a power supply device including more than two power supply components
  • FIG. 7 is a schematic circuit diagram of a power supply device including two power supply components according to another embodiment
  • FIG. 8 is a schematic circuit diagram of a power supply device including more than two power supply components according to another embodiment
  • FIG. 9 is another schematic circuit diagram of a power supply device including two power supply components according to another embodiment.
  • FIG. 10 is another schematic circuit diagram of a power supply device including more than two power supply components according to another embodiment
  • FIG. 11 is a schematic circuit diagram for implementing a voltage converter
  • FIG. 12 is a schematic circuit diagram for implementing a current converter.
  • connection and “connection” mentioned in this application, unless otherwise specified, include direct and indirect connection (connection).
  • each power supply circuit is equal, that is, the voltage across the series circuit composed of battery 1 and diode D1, the voltage across the series circuit composed of battery 2 and diode D2, ... ..., the voltage at both ends of the series circuit formed by battery n and diode Dn, they are the same, but because the power, voltage and internal resistance of the battery in the power supply circuit of each way are usually different, so this leads to each way
  • the current of the power supply circuit is different, which causes the voltage drop of the diodes of each path to be different, and some even reverse bias, so that the discharge voltage of the batteries of each path is different, and some do not even discharge.
  • the inventor has ingeniously conceived the battery in one circuit through a voltage converter to make a set voltage for power supply, and the batteries in other circuits have passed through a current converter to make each The output current of the circuit is the same; but this brings another problem, that is, the final output voltage of each circuit may be different, which may not meet the voltage requirements of the load, so the inventor continues to conceive
  • the output terminals are connected together, so that the output voltage of each circuit is the same and is equal to the voltage for power supply set by the voltage converter.
  • the output voltage of each circuit is the same and controllable (that is, it can be set to the required voltage), which ensures the requirement of the supply voltage of the load, and the discharge current of each battery is also the same, making the battery Discharge does not depend on the voltage of the battery itself, which solves the problem of power imbalance in the power supply system of the ultrasonic trolley and improves the reliability of the system.
  • the specific description will be given below.
  • an embodiment of the present application provides an ultrasound trolley, which includes a power supply device.
  • an embodiment of the power supply device of the ultrasonic trolley may include multiple parallel power supply components, for example, including N parallel power supply components, where N is an integer of size or equal to 2.
  • the first power supply component among the multiple parallel power supply components includes a first battery 11 connected in series, a first voltage converter 12 and a current sampler 40.
  • the first voltage converter 12 is used to transform the input DC power to output a DC voltage of a preset voltage.
  • the current sampler 40 is used to sample the direct current output by the first voltage converter 12 to obtain a sampled current.
  • the second power supply component in the multi-channel parallel power supply component includes a second battery 21 and a second current converter 22 connected in series.
  • the control end of the second current converter 22 is connected to the current sampler 40 for input and output.
  • the direct current of is converted into direct current of the same size as the sampling current. Therefore, through the second current converter 22, the DC power input and output by the second current converter 22 can be converted into DC power having the same magnitude as the sampling current, so the DC power output from the second battery 21 and the first battery 11 is equal.
  • the output voltage of the second current converter 22 is equal to the output voltage of the first voltage converter 12, and the output voltage of the first voltage converter 12 itself is Controlled, that is, the first voltage converter 12 converts the input voltage to output a preset voltage, so that the output voltage of the entire power supply device is adjustable-for example, set according to the requirements of the load, and the discharge current of each battery is equal, For example, the discharge currents of the first battery 11 and the second battery 21 are equal.
  • the above is the description of the case of two-way power supply components. Understandably, when the number of power supply components included in the power supply device is three or more (that is, N takes an integer of 3 or greater), start from the third way
  • the power supply component of the power supply can have the same structure and function as the second power supply component, that is, it can include a battery and a current converter connected in series.
  • the controller of the current converter is connected to the current sampler 40, which is used to input and output DC power. It is converted into direct current of the same magnitude as the sampling current.
  • the third power supply component in the multi-channel parallel power supply component includes a third battery 31 and a third current converter 32 connected in series.
  • the control terminal of the third current converter 32 and the current sampling The device 40 is connected to convert the input and output DC power into DC power of the same magnitude as the sampling current.
  • the DC power input and output from the third current converter 32 can be converted into DC power of the same magnitude as the sampling current, so the third battery 31, the second battery 21, and the first battery 11 output
  • the DC power is equal; at the same time, because the third power supply component is also in parallel relationship with the first power supply component, the voltage output by the third power supply component is also equal to the voltage output by the first power supply component.
  • the ellipsis formed by the bottom three black dots in FIG. 4 indicates that the multi-channel parallel power supply component can include more power supply components in addition to the three-way power supply component, but for the convenience of drawing, there is no Draw it out.
  • the power supply device may further include an AC-DC converter 50.
  • the AC-DC converter 50 is used to connect to an AC power grid to convert the AC power input by the AC power grid into DC power and output it.
  • the DC power output by the AC-DC converter 50 can charge the batteries in each power supply component, and can also supply power to a load (such as a portable ultrasound host).
  • the power supply components of each circuit may include a charger for converting the DC power output by the AC-DC converter 50 into DC power suitable for charging the respective batteries.
  • the first power supply component further includes a first charger 13 for converting the DC power output by the AC-DC converter 50 into DC power suitable for charging the first battery 11;
  • the second power supply component further includes The second charger 23 is used to convert the DC power output from the AC-DC converter 50 into DC power suitable for charging the second battery 21.
  • N takes an integer of 3 or greater than 3
  • the third power supply The assembly further includes a third charger 33 for converting the DC power output by the AC-DC converter 50 into DC power suitable for charging the third battery 31.
  • a third charger 33 for converting the DC power output by the AC-DC converter 50 into DC power suitable for charging the third battery 31.
  • the following explains how the DC power output from the AC-DC converter 50 supplies power to a load (for example, a portable ultrasonic host).
  • a load for example, a portable ultrasonic host.
  • the output end of the AC / DC converter 50 may be connected to the input end of one or more converters in the multi-parallel power supply assembly, where the converter here refers to a voltage converter—such as a first voltage converter 12, and current converter-for example, the second current converter 22 and the third current converter 32. Therefore, in one embodiment, the output terminal of the AC-DC converter 50 is also connected to the input terminal of the first voltage converter 12, and the first voltage converter 12 converts the input DC power into a DC power output of a preset voltage. In one embodiment, the output terminal of the AC-DC converter 50 is also connected to the input terminal of the second current converter 22, and the second current converter 22 converts the input and output currents to be equal to the sampling current.
  • the converter here refers to a voltage converter—such as a first voltage converter 12, and current converter-for example, the second current converter 22 and the third current converter 32. Therefore, in one embodiment, the output terminal of the AC-DC converter 50 is also connected to the input terminal of the first voltage converter 12, and the first voltage converter 12 converts
  • the output terminal of the AC-DC converter 50 When the output terminal of the AC-DC converter 50 is connected to at least two paths of the power supply components, one of the paths is the first path power supply component.
  • the current of each power supply component when the output terminal of the AC-DC converter 50 is connected to at least two of the power supply components, the current of each power supply component will be reduced, resulting in less heat generation. The heat loss has also become smaller. Therefore, the output terminal of the AC-DC converter 50 is connected to the input terminals of all the converters in the power supply module.
  • the above is to sample current from the output of the voltage converter, and then the current converter controls the input and output current according to the sampled current. Since the voltage converter itself also has a certain current control function, in some embodiments, current sampling can also be performed from the output of the current converter, and then the sampled current can be input to the control terminal of the voltage converter as the feedback current of the voltage converter , So that the voltage converter can also adjust its input and output current based on the sampled current.
  • current sampling can also be performed from the output of the current converter, and then the sampled current can be input to the control terminal of the voltage converter as the feedback current of the voltage converter , So that the voltage converter can also adjust its input and output current based on the sampled current.
  • the power supply device of the ultrasonic trolley may include multiple parallel power supply components, for example, including N parallel power supply components, where N is an integer of size or equal to 2.
  • the first power supply component of the multiple parallel power supply components includes a first battery 11 and a first voltage converter 12 connected in series.
  • the first voltage converter 12 is used to transform the input DC power to output a DC voltage of a preset voltage.
  • the second power supply component of the multiple parallel power supply components includes a second battery 21, a second current converter 22 and a current sampler 40 connected in series.
  • the current sampler 40 is used to sample the direct current output by the second current converter 22 to obtain a sampled current.
  • the current sampler 40 is also connected to the control terminal of the first voltage converter 12 so that the first voltage converter 12 controls the input and output DC power according to the sampling current.
  • the control terminal of the current converter 22 may be connected to the current sampler 40 to receive the sampling current; or it may not be connected to the current sampler 40, that is, it does not receive the sampling current.
  • the voltages output by the first and second power supply components can be the same, and the discharge currents of the batteries of the two paths are approximately equal, for example, the discharge currents of the first battery 11 and the second battery 21 are approximately equal .
  • the power supply components starting from the third channel have the same structure and function, that is, they can include batteries and current converters connected in series
  • the controller of the current converter is connected to the current sampler 40, and is used to convert the input and output DC power into DC power of the same magnitude as the sampling current.
  • the third power supply component in the multi-channel parallel power supply component includes a third battery 31 and a third current converter 32 connected in series.
  • the device 40 is connected to convert the input and output DC power into DC power of the same magnitude as the sampling current.
  • the direct current input and output from the third current converter 32 can be converted into direct current of the same magnitude as the sampling current. Therefore, the discharge currents of the third battery 31 and the second battery 21 are equal.
  • the three-way power supply component is also in a parallel relationship with the first-way power supply component, so the voltage output by the third-way power supply component is also equal to the voltage output by the first-way power supply component. It should be noted that the ellipsis formed by the three black dots in the bottom of FIG. 8 indicates that the multi-channel parallel power supply component can include more power supply components in addition to the three-way power supply component, but for the convenience of drawing, there is no Draw it out.
  • the output voltages of the parallel components of each channel are equal, and the discharge current of the batteries of each channel is also substantially equal, that is, the battery from the second channel to the Nth channel
  • the discharge currents are all equal and approximately equal to the discharge currents of the first battery.
  • the power supply device may further include an AC-DC converter 50.
  • the AC-DC converter 50 is used to connect to an AC power grid to convert the AC power input by the AC power grid into DC power and output it.
  • the DC power output by the AC-DC converter 50 can charge the batteries in each power supply component, and can also supply power to a load (such as a portable ultrasound host).
  • the power supply components of each circuit may include a charger for converting the DC power output by the AC-DC converter 50 into DC power suitable for charging the respective batteries.
  • the first power supply component further includes a first charger 13 for converting the DC power output by the AC-DC converter 50 into DC power suitable for charging the first battery 11;
  • the second power supply component further includes The second charger 23 is used to convert the DC power output from the AC-DC converter 50 into DC power suitable for charging the second battery 21.
  • N takes an integer of 3 or greater
  • the third power supply The assembly further includes a third charger 33 for converting the DC power output by the AC-DC converter 50 into DC power suitable for charging the third battery 31.
  • a third charger 33 for converting the DC power output by the AC-DC converter 50 into DC power suitable for charging the third battery 31.
  • the following explains how the DC power output from the AC-DC converter 50 supplies power to a load (for example, a portable ultrasonic host).
  • a load for example, a portable ultrasonic host.
  • the output end of the AC / DC converter 50 may be connected to the input end of one or more converters in the multi-parallel power supply assembly, where the converter here refers to a voltage converter—such as a first voltage converter 12, and current converter-for example, the second current converter 22 and the third current converter 32. Therefore, in one embodiment, the output terminal of the AC-DC converter 50 is also connected to the input terminal of the first voltage converter 12, and the first voltage converter 12 converts the input DC power into a DC power output of a preset voltage. In one embodiment, the output terminal of the AC-DC converter 50 is also connected to the input terminal of the second current converter 22, and the second current converter 22 converts the input and output currents to be equal to the sampling current.
  • the converter here refers to a voltage converter—such as a first voltage converter 12, and current converter-for example, the second current converter 22 and the third current converter 32. Therefore, in one embodiment, the output terminal of the AC-DC converter 50 is also connected to the input terminal of the first voltage converter 12, and the first voltage converter 12 converts
  • one path is the first path power supply component.
  • the output terminal of the AC-DC converter 50 is connected to at least two paths of the power supply components, preferably, one path is the first path power supply component.
  • the output terminal of the AC-DC converter 50 is connected to the input terminals of all the converters in the power supply assembly.
  • the current sampler 40 further includes a current amplifier for amplifying the sampled current before outputting. That is, the current sampler 40 amplifies the sampled current and outputs it to the corresponding converter.
  • the current sampler 40 in the present application may be a high-side current sampling or a low-side current sampling, and may be implemented by a non-inductive sampling resistor or a Hall current sensor.
  • the power supply device further includes a battery compartment (not shown in the drawings), which is used to place batteries in each power supply assembly, for example, the first battery 11 and the second battery 21.
  • a battery compartment (not shown in the drawings), which is used to place batteries in each power supply assembly, for example, the first battery 11 and the second battery 21.
  • the voltage converter in this article is used to transform the input DC voltage to output a DC voltage with a preset voltage.
  • the current technology can be used to implement the technology that will appear in the future, as long as its function is to transform the input DC power to output a preset voltage of DC power. An implementation is given below.
  • the voltage converter of an embodiment, for example, the first voltage converter 12, can be implemented using the circuit shown in FIG. 11, which is mainly implemented by using a chip model LT8390 and the peripheral circuit in the figure, in which the chip LT8390
  • the FB pin is used to control the voltage of the voltage converter, that is, to realize the direct current output of the preset voltage.
  • the CTRL pin of the FB of the chip LT8390 is the control terminal of the voltage converter-for example, the controller of the first voltage converter 12, In this article, the CTRL pin realizes the function of adjusting the input and output current of the voltage converter by receiving the sampling current.
  • the current converters in this article can receive the sampled current through the control terminal to convert the input and output currents into the sampled current .
  • the current converter in this article can be implemented in a variety of ways, either using current technology or future technology, as long as its function can be achieved by receiving the sampling current through the control terminal, it will The input and output currents can be converted to sampling currents. An implementation is given below.
  • the current converter of an embodiment for example, the second current converter 22 and the third current converter 32, etc., can be implemented using the circuit shown in FIG. 12, which mainly uses a chip model LT8390 and cooperates with It is realized by peripheral circuits.
  • the CTRL pin of the FB of the chip LT8390 is the control terminal of the current converter—for example, the controllers of the second current converter 22 and the third current converter 32.
  • the CTRL pin is Sampling current to achieve the function of adjusting the input and output current of the current converter to wait for the sampling current.
  • the ultrasonic trolley and its power supply device of the present application include multiple parallel power supply components.
  • One power supply component sets the power supply voltage to the load through the voltage converter, and the other power supply components are implemented through the current converter.
  • the discharge currents of the batteries in each channel are equal, so that the battery discharge does not depend on the battery power, which solves the problem of unbalanced power supply of the ultrasonic trolley and improves the reliability of the power supply system.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

一种供电装置和超声台车，包括多路并联的供电组件，一路供电组件通过电压变换器来设定给负载的供电电压，其他路供电组件通过电流变换器来实现各路电池的放电电流相等，使得电池放电不依赖于电池的电量，解决了超声台车供电电量不均衡问题，提高了供电系统的可靠性。

Description

一种供电装置和超声台车 技术领域
本发明涉及一种供电装置和超声台车。
 背景技术
便携式超声（主机）主要用于POC（Point Of Care）、麻醉和理疗，这要求便携式超声主机不仅轻薄和便携，而且电池续航时间长。为满足长时间续航要求，便携超声主机的一种应用场景是放在超声台上进行充电和工作。
超声台车的主要功能有：具备主机探头扩展功能，具有AC辅助输出功能，具备为便携超声主机增加续航能力的供电功能。
超声台车为便携超声主机供电的技术原理如图1所示，超声台车内配置多个并联的供电电路，并连接到电压变换器中，电压变换器将输入电压转换成便携超声主机所需要的电压；每一路供电电路都采用电池并通过二极管来为电压变换器供电。同时，交直流电路（AC-DC）可以将通过外接电网输入的交流电转变为直流电并通过一二极管给电压变换器供电，并且交直流电路（AC-DC）输出的直流电也可以通过为每个电池独立配备的充电器来为电池充电。
现有的这种电池供电系统寿命和可靠性都比较低。因为电池通过二极管D1~Dn并联放电，电池的放电电流取决于电池的电压，又由于每个电池的电量、电压和内阻通常情况下都是不同的，因此电路中都是较高电压的电池主导为电压变换器供电，对每个电池来说，放电电流不均衡，有的电池处于长期过放电状态，有的电池长期不能供电，电池系统的利用率低，超声台车续航时间短，并且长期供电的那些电池由于承担整机电流大而导致寿命低，系统可靠性降低。
 技术问题
考虑到上述问题，本发明主要提供一种供电装置和超声台车。
 技术解决方案
一种实施例中提第一种供电装置，包括多路并联的供电组件：
所述多路并联的供电组件的第一路供电组件包括串联的第一电池、第一电压变换器和电流采样器；所述第一电压变换器用于对输入的直流电变压，以输出预设电压的直流电，所述电流采样器用于对所述第一电压变换器输出的直流电进行采样，得到采样电流；
所述多路并联的供电组件的第二路供电组件包括串联的第二电池和第二电流变换器，所述第二电流变换器的控制端与所述电流采样器连接，用于将输入和输出的直流电变换成与所述采样电流大小相同的直流电。
一种实施例也提供一种供电装置，包括多路并联的供电组件：
所述多路并联的供电组件的第一路供电组件包括串联的第一电池和第一电压变换器；所述第一电压变换器用于对输入的直流电变压，以输出预设电压的直流电；
所述多路并联的供电组件的第二路供电组件包括串联的第二电池、第二电流变换器和电流采样器；所述电流采样器用于对所述第二电流变换器输出的直流电进行采样，得到采样电流；所述电流采样器还与所述第一电压变换器的控制端连接，以使得所述第一电压变换器根据采样电流控制输入和输出的直流电。
一实施例中，所述多路并联的供电组件的第三路供电组件包括串联的第三电池和第三电流变换器，所述第三电流变换器的控制端与所述电流采样器连接，用于将输入和输出的直流电变换成与所述采样电流大小相同的直流电。
一实施例中，所述第二电流变换器的控制端与所述电流采样器连接。
一实施例中，所述电流采样器还包括一电流放大器，用于将采样电流放大后再输出。
一实施例中，所述供电装置还包括交直流变换器，用于接入交流电网，将交流电网输入的交流电变换为直流电并输出。
一实施例中，所述第一路供电组件还包括第一充电器，用于将所述交直流变换器输出的直流电变换为适合给第一电池充电用的直流电；所述第二路供电组件还包括第二充电器，用于将所述交直流变换器输出的直流电变换为适合给第二电池充电用的直流电。
一实施例中，所述第三路供电组件还包括第三充电器，用于将所述交直流变换器输出的直流电变换为适合给第三电池充电用的直流电。
一实施例中，所述交直流变换器的输出端还与所述第一电压变换器的输入端连接；和/或，所述交直流变换器的输出端还与所述第二电流变换器的输入端连接。
一实施例中，所述供电装置还包括电池仓，用于放置所述第一电池和第二电池。
根据第二方面，一种实施例中提供一种超声台车，包括如上任一实施例所述的供电装置。
 有益效果
依据上述实施例的供电装置和超声台车，包括多路并联的供电组件，一路供电组件通过电压变换器来设定给负载的供电电压，其他路供电组件通过电流变换器来实现各路电池的放电电流相等， 使得电池放电不依赖于电池的电量，解决了超声台车供电电量不均衡问题，提高了供电系统的可靠性。
 附图说明
图1为超声台车为便携超声主机供电的供电系统的一种电路原理路；
图2为一种实施例的超声台车的结构示意图；
图3为一种实施例的包含两路供电组件的供电装置的一种电路示意图；
图4为一种实施例的包含多于两路的供电组件的供电装置的一种电路示意图；
图5为一种实施例的包含两路供电组件的供电装置的另一种电路示意图；
图6为一种实施例的包含多于两路的供电组件的供电装置的另一种电路示意图；
图7为另一种实施例的包含两路供电组件的供电装置的一种电路示意图；
图8为另一种实施例的包含多于两路的供电组件的供电装置的一种电路示意图；
图9为另一种实施例的包含两路供电组件的供电装置的另一种电路示意图；
图10为另一种实施例的包含多于两路的供电组件的供电装置的另一种电路示意图；
图11为一种用于实现电压变换器的电路示意图；
图12为一种用于实现电流变换器的电路示意图。
 本发明的实施方式
具体实施方式
下面通过具体实施方式结合附图对本发明作进一步详细说明。其中不同实施方式中类似元件采用了相关联的类似的元件标号。在以下的实施方式中，很多细节描述是为了使得本申请能被更好的理解。然而，本领域技术人员可以毫不费力的认识到，其中部分特征在不同情况下是可以省略的，或者可以由其他元件、材料、方法所替代。在某些情况下，本申请相关的一些操作并没有在说明书中显示或者描述，这是为了避免本申请的核心部分被过多的描述所淹没，而对于本领域技术人员而言，详细描述这些相关操作并不是必要的，他们根据说明书中的描述以及本领域的一般技术知识即可完整了解相关操作。
另外，说明书中所描述的特点、操作或者特征可以以任意适当的方式结合形成各种实施方式。同时，方法描述中的各步骤或者动作也可以按照本领域技术人员所能显而易见的方式进行顺序调换或调整。因此，说明书和附图中的各种顺序只是为了清楚描述某一个实施例，并不意味着是必须的顺序，除非另有说明其中某个顺序是必须遵循的。
本文中为部件所编序号本身，例如“第一”、“第二”等，仅用于区分所描述的对象，不具有任何顺序或技术含义。而本申请所说“连接”、“联接”，如无特别说明，均包括直接和间接连接（联接）。
图1中的电池供电系统，虽然每一路的供电电路的输出电压都相等，即电池1和二极管D1构成的串联电路的两端电压、电池2和二极管D2构成的串联电路的两端电压、……、电池n和二极管Dn构成的串联电路的两端电压，它们都相同，但是因为各路的供电电路中电池的电量、电压和内阻通常情况下都是不同的，因此这就导致每一路的供电电路的电流不同，从而导致各路的二极管的降压不同，有些甚至反偏，从而各路的电池的放电电压不同，有些甚至不放电。
为了解决上述问题，发明人经过巧妙构思，先将一路电路中的电池经过电压变换器，来使出一个设置的用于供电的电压，其他路的电池都分别经过一个电流变换器，来使得各路电路输出的供电电流相同；但是这又带来一个问题，即每路电路最终输出的供电电压可能不一样，这有可能不满足负载的电压要求，因此发明人继续构思，将各路电路的输出端连接在一起，从而使得各路电路的输出电压都相同，且等于电压变换器设置的用于供电的电压。通过上述构思，使得各路电路输出的电压都相同且可控（即可以被设置到需要的电压），这保证了对负载的供电电压的要求，同时各电池的放电电流也都相同，使得电池放电不依赖于电池本身的电压，解决了超声台车供电系统电量不均衡问题，提高了系统的可靠性，下面具体说明。
请参照图2，本申请一实施例中提供一种超声台车，该超声台车包括一供电装置。请参照图3，一实施例超声台车的供电装置可以包括多路并联的供电组件，例如包括N路并联的供电组件，其中N为大小或等于2的整数。
多路并联的供电组件中的第一路供电组件包括串联的第一电池11、第一电压变换器12和电流采样器40。第一电压变换器12用于对输入的直流电变压，以输出预设电压的直流电。电流采样器40用于对所述第一电压变换器12输出的直流电进行采样，得到采样电流。
多路并联的供电组件中的第二路供电组件包括串联的第二电池21和第二电流变换器22，第二电流变换器22的控制端与电流采样器40连接，用于将输入和输出的直流电变换成与采样电流大小相同的直流电。因此通过第二电流变换器22，可以将第二电流变换器22输入和输出的直流电变换成与采样电流大小相同的直流电，因此第二电池21和第一电池11输出的直流电也就相等了。另外，由于各路供电组件之间的为并联关系，因此第二电流变换器22的输出电压是与第一电压变换器12的输出电压相等，而第一电压变换器12的输出电压本身是可控的，即第一电压变换器12将输入电压进行变换以输出预设的电压，因此实现了整个供电装置输出电压可调——例如根据负载的要求来设置，并且各个电池的放电电流相等，例如第一电池11和第二电池21的放电电流相等。
以上是说明了两路供电组件的情况，可以理解地，当供电装置包括的供电组件的路数为三路或者更多路时（即N取3或大于3的整数），从第三路开始的供电组件，其结构和功能都可以与第二路供电组件相同，即可以包括串联的电池和电流变换器，电流变换器的控制器与电流采样器40连接，用于将输入和输出的直流电变换成与采样电流大小相同的直流电。请参照图4，例如一实施例中多路并联的供电组件中的第三路供电组件包括串联的第三电池31和第三电流变换器32，第三电流变换器32的控制端与电流采样器40连接，用于将输入和输出的直流电变换成与所述采样电流大小相同的直流电。同样地，通过第三电流变换器32，可以将第三电流变换器32输入和输出的直流电变换成与采样电流大小相同的直流电，因此第三电池31、第二电池21、第一电池11输出的直流电也就相等了；同时，由于第三路供电组件也是与第一路供电组件并联的关系，因此第三路供电组件输出的电压也等于第一路供电组件输出的电压。需要说明的是，图4中最下方三个黑点组成的省略号表示的是多路并联的供电组件除了包括三路供电组件，还可以包括更多的供电组件，可是为了画图的方便，并未画出来。
综上所述，可以看到，当通过电池向负载供电时，各路并联的供电组件的输出电压相等，并且各路的电池的放电电流也相等。
请参照图5，一实施例的供电装置还可以包括一交直流变换器50，交直流变换器50用于接入交流电网，将交流电网输入的交流电变换为直流电并输出。交直流变换器50输出的直流电可以为各路供电组件中的电池充电，也可以向负载（例如便携超声主机）供电。
以下说明交直流变换器50输出的直流电如何为各路供电组件中的电池充电。
一实施例中各路的供电组件都可以包括一个充电器，用于将交直流变换器50输出的直流电变换成适合给各自电池充电的直流电。例如一实施例中，第一路供电组件还包括第一充电器13，用于将交直流变换器50输出的直流电变换为适合给第一电池11充电用的直流电；第二路供电组件还包括第二充电器23，用于将交直流变换器50输出的直流电变换为适合给第二电池21充电用的直流电。同样地，可以理解地，当供电装置包括的供电组件的路数为三路或者更多路时（即N取3或大于3的整数）也是类似地，例如请参照图6，第三路供电组件还包括第三充电器33，用于将交直流变换器50输出的直流电变换为适合给第三电池31充电用的直流电。需要说明的是，图6中最下方三个黑点组成的省略号表示的是多路并联的供电组件除了包括三路供电组件，还可以包括更多的供电组件，可是为了画图的方便，并未画出来。
以下说明交直流变换器50输出的直流电如何向负载（例如便携超声主机）供电。
交直流变换器50的输出端可以与多路并联的供电组件中的一路或多路中的变换器的输入端连接，其中这里的变换器指的是电压变换器——例如第一电压变换器12，和电流变换器——例如第二电流变换器22和第三电流变换器32。因此一实施例中交直流变换器50的输出端还与第一电压变换器12的输入端连接，第一电压变换器12将输入的直流电变换出预设电压的直流电输出。一实施例中交直流变换器50的输出端还与第二电流变换器22的输入端连接，第二电流变换器22将输入和输出电流变换成与采样电流相等。
当交直流变换器50的输出端与供电组件中的至少两路连接时，其中一路为第一路供电组件。另外，相比只与供电组件中的一路连接，当交直流变换器50的输出端与供电组件中的至少两路连接时，各路供电组件的电流会减小，从而发热变小了，总的热损失也变小了。因此，交直流变换器50的输出端与供电组件中的所有路的变换器的输入端都连接。
可以看到引入交直流变换器50以通过交流电网来向负载供电时，各路并联的供电组件的输出电压相等，各路并联的供电组件的电流也相等。
以上是从电压变换器输出中进行电流采样，然后电流变换器根据采样所得电流控制输入和输出电流。由于电压变换器本身也有一定的电流控制作用，因此一些实施例中也可以从电流变换器输出中进行电流采样，然后将采样得到电流输入到电压变换器的控制端，作为电压变换器的反馈电流，使得电压变换器也可以基于采样得到的电流来调节自身的输入和输出电流。下面具体说明。
请参照图7，一实施例中一实施例超声台车的供电装置可以包括多路并联的供电组件，例如包括N路并联的供电组件，其中N为大小或等于2的整数。
多路并联的供电组件中的第一路供电组件包括串联的第一电池11和第一电压变换器12。第一电压变换器12用于对输入的直流电变压，以输出预设电压的直流电。
多路并联的供电组件中的第二路供电组件包括串联的第二电池21、第二电流变换器22和电流采样器40。电流采样器40用于对第二电流变换器22输出的直流电进行采样，得到采样电流。电流采样器40还与第一电压变换器12的控制端连接，以使得第一电压变换器12根据采样电流控制输入和输出的直流电。电流变换器22的控制端则可以与电流采样器40相连，来接收采样电流；也可以不与电流采样器40相连，即不接收采样电流。
通过上述的结构，可以使得第一路供组件和第二路供电组件输出的电压相同，并且这两路的电池的放电电流大致相等，例如第一电池11和第二电池21的放电电流大致相等。
电组件的路数为三路或者更多路时（即N取3或大于3的整数），从第三路开始的供电组件，结构和功能都相同，即可以包括串联的电池和电流变换器，电流变换器的控制器与电流采样器40连接，用于将输入和输出的直流电变换成与采样电流大小相同的直流电。请参照图8，例如一实施例中多路并联的供电组件中的第三路供电组件包括串联的第三电池31和第三电流变换器32，第三电流变换器32的控制端与电流采样器40连接，用于将输入和输出的直流电变换成与所述采样电流大小相同的直流电。通过第三电流变换器32，可以将第三电流变换器32输入和输出的直流电变换成与采样电流大小相同的直流电，因此第三电池31和第二电池21的放电电流相等，同时，由于第三路供电组件也是与第一路供电组件并联的关系，因此第三路供电组件输出的电压也等于第一路供电组件输出的电压。需要说明的是，图8中最下方三个黑点组成的省略号表示的是多路并联的供电组件除了包括三路供电组件，还可以包括更多的供电组件，可是为了画图的方便，并未画出来。
综上所述，可以看到，当通过电池向负载供电时，各路并联的组件的输出电压相等，并且各路的电池的放电电流也基本相等，即从第二路到第N路的电池的放电电流都相等，并且约等于第一路的电池的放电电流相等。
请参照图9，一实施例的供电装置还可以包括一交直流变换器50，交直流变换器50用于接入交流电网，将交流电网输入的交流电变换为直流电并输出。交直流变换器50输出的直流电可以为各路供电组件中的电池充电，也可以向负载（例如便携超声主机）供电。
以下说明交直流变换器50输出的直流电如何为各路供电组件中的电池充电。
一实施例中各路的供电组件都可以包括一个充电器，用于将交直流变换器50输出的直流电变换成适合给各自电池充电的直流电。例如一实施例中，第一路供电组件还包括第一充电器13，用于将交直流变换器50输出的直流电变换为适合给第一电池11充电用的直流电；第二路供电组件还包括第二充电器23，用于将交直流变换器50输出的直流电变换为适合给第二电池21充电用的直流电。同样地，可以理解地，当供电装置包括的供电组件的路数为三路或者更多路时（即N取3或大于3的整数）也是类似地，例如请参照图10，第三路供电组件还包括第三充电器33，用于将交直流变换器50输出的直流电变换为适合给第三电池31充电用的直流电。需要说明的是，图10中最下方三个黑点组成的省略号表示的是多路并联的供电组件除了包括三路供电组件，还可以包括更多的供电组件，可是为了画图的方便，并未画出来。
以下说明交直流变换器50输出的直流电如何向负载（例如便携超声主机）供电。
交直流变换器50的输出端可以与多路并联的供电组件中的一路或多路中的变换器的输入端连接，其中这里的变换器指的是电压变换器——例如第一电压变换器12，和电流变换器——例如第二电流变换器22和第三电流变换器32。因此一实施例中交直流变换器50的输出端还与第一电压变换器12的输入端连接，第一电压变换器12将输入的直流电变换出预设电压的直流电输出。一实施例中交直流变换器50的输出端还与第二电流变换器22的输入端连接，第二电流变换器22将输入和输出电流变换成与采样电流相等。
当交直流变换器50的输出端与供电组件中的至少两路连接时，较优地，其中一路为第一路供电组件。另外，相比只与供电组件中的一路连接，当交直流变换器50的输出端与供电组件中的至少两路连接时，各路供电组件的电流会减小，从而发热变小了，总的热损失也变小了。因此，优较地，交直流变换器50的输出端与供电组件中的所有路的变换器的输入端都连接。
可以看到引入交直流变换器50以通过交流电网来向负载供电时，各路并联的供电组件的输出电压相等，各路并联的供电组件的电流也基本相等，即从第二路到第N路的供电组件的电流都相等，并且约等于第一路的供电组件的放电电流相等。
为了使得均流效果更好，一实施例中电流采样器40还包括一电流放大器，用于将采样电流放大后再输出。即电流采样器40将采样电流放大后再输出给相应的变换器。本申请中的电流采样器40可以是高边电流采样也可以是低边电流采样，可以采用无感采样电阻或霍尔电流传感器等来实现。
一实施例中供电装置还包括电池仓（附图中未画出），用于放置各路的供电组件中的电池，例如用于放置第一电池11和第二电池21等。通过引入电池仓，使得本申请的供电装置支持一个或多个电池自由插拔，并且不用影响其他路的供电组件的工作，即使其中一路电池损坏，对其他路的供电组件没有影响，这提高了供电可靠性。
需要说明的是本文中的电压变换器——例如第一电压变换器12，是用于将输入的直流电变压，以输出预设电压的直流电，其实现的方式可以有多种，既可以采用现的技术来实现，也可以采用未来出现的技术来实现，只要其功能是用于将输入的直流电变压以输出预设电压的直流电。下面给出一种实现方式。
一实施例的电压变换器——例如第一电压变换器12，可以采用如图11所示的电路来实现，其主要采用型号为LT8390的芯片并配合图中的外围电路来实现，其中芯片LT8390的FB引脚用于控制电压变换器的电压，即实现输出预设电压的直流电，芯片LT8390的FB的CTRL引脚为电压变换器的控制端——例如第一电压变换器12的控制器，在本文中该CTRL引脚通过接收采样电流来实现调节电压变换器的输入和输出电流的功能。
同样地，本文中的的电流变换器——例如第二电流变换器22和第三电流变换器32等，可以通过控制端接收采样电流，来实现将本身的输入和输出的电流变换为采样电流。本文中的的电流变换器其实现的方式可以有多种，既可以采用现的技术来实现，也可以采用未来出现的技术来实现，只要其功能可以实现通过控制端接收采样电流，将本身的输入和输出的电流变换为采样电流即可。下面给出一种实现方式。
一实施例的电流变换器——例如第二电流变换器22和第三电流变换器32等，可以采用如图12所示的电路来实现，其主要采用型号为LT8390的芯片并配合图中的外围电路来实现，其中芯片LT8390的FB的CTRL引脚为电流变换器的控制端——例如第二电流变换器22和第三电流变换器32的控制器，在本文中该CTRL引脚通过接收采样电流来实现调节电流变换器的输入和输出电流等待采样电流的功能。
综上所述，本申请的超声台车及其供电装置，包括多路并联的供电组件，一路供电组件通过电压变换器来设定给负载的供电电压，其他路供电组件通过电流变换器来实现各路电池的放电电流相等， 使得电池放电不依赖于电池的电量，解决了超声台车供电电量不均衡问题，提高了供电系统的可靠性。
以上应用了具体个例对本发明进行阐述，只是用于帮助理解本发明，并不用以限制本发明。对于本领域的一般技术人员，依据本发明的思想，可以对上述具体实施方式进行变化。

Claims (11)

  1. 一种供电装置，包括多路并联的供电组件，其特征在于：
    所述多路并联的供电组件的第一路供电组件包括串联的第一电池、第一电压变换器和电流采样器；所述第一电压变换器用于对输入的直流电变压，以输出预设电压的直流电，所述电流采样器用于对所述第一电压变换器输出的直流电进行采样，得到采样电流；
    所述多路并联的供电组件的第二路供电组件包括串联的第二电池和第二电流变换器，所述第二电流变换器的控制端与所述电流采样器连接，用于将输入和输出的直流电变换成与所述采样电流大小相同的直流电。
  2. 一种供电装置，包括多路并联的供电组件，其特征在于：
    所述多路并联的供电组件的第一路供电组件包括串联的第一电池和第一电压变换器；所述第一电压变换器用于对输入的直流电变压，以输出预设电压的直流电；
    所述多路并联的供电组件的第二路供电组件包括串联的第二电池、第二电流变换器和电流采样器；所述电流采样器用于对所述第二电流变换器输出的直流电进行采样，得到采样电流；所述电流采样器还与所述第一电压变换器的控制端连接，以使得所述第一电压变换器根据采样电流控制输入和输出的直流电。
  3. 如权利要求1或2所述的供电装置，其特征在于，所述多路并联的供电组件的第三路供电组件包括串联的第三电池和第三电流变换器，所述第三电流变换器的控制端与所述电流采样器连接，用于将输入和输出的直流电变换成与所述采样电流大小相同的直流电。
  4. 如权利要求2所述的供电装置，其特征在于，所述第二电流变换器的控制端与所述电流采样器连接。
  5. 如权利要求1至4中任一项所述的供电装置，其特征在于，所述电流采样器还包括一电流放大器，用于将采样电流放大后再输出。
  6. 如权利要求1至4中任一项所述的供电装置，其特征在于，还包括交直流变换器，用于接入交流电网，将交流电网输入的交流电变换为直流电并输出。
  7. 如权利要求6所述的供电装置，其特征在于，所述第一路供电组件还包括第一充电器，用于将所述交直流变换器输出的直流电变换为适合给第一电池充电用的直流电；所述第二路供电组件还包括第二充电器，用于将所述交直流变换器输出的直流电变换为适合给第二电池充电用的直流电。
  8. 如权利要求7所述的供电装置，其特征在于，所述第三路供电组件还包括第三充电器，用于将所述交直流变换器输出的直流电变换为适合给第三电池充电用的直流电。
  9. 如权利要求6所述的供电装置，其特征在于，所述交直流变换器的输出端还与所述第一电压变换器的输入端连接；和/或，所述交直流变换器的输出端还与所述第二电流变换器的输入端连接。
  10. 如权利要求1或2所述的供电装置，其特征在于，还包括电池仓，用于放置所述第一电池和第二电池。
  11. 一种超声台车，其特征在于，包括如权利要求1至10中任一项所述的供电装置。
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