CN205509622U - Compound power supply unit - Google Patents
Compound power supply unit Download PDFInfo
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- CN205509622U CN205509622U CN201620035899.5U CN201620035899U CN205509622U CN 205509622 U CN205509622 U CN 205509622U CN 201620035899 U CN201620035899 U CN 201620035899U CN 205509622 U CN205509622 U CN 205509622U
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Abstract
The utility model discloses a compound power supply unit, including energy collector unit, rechargeable battery unit and voltage regulation unit, wherein, the energy collector unit links to each other with outside energy source for collection and temporary storage outside energy source transmit the electric energy of coming, still are used for output temporary storage's when the electric energy of collecting is more than or equal to predetermined threshold value electric energy, the rechargeable battery unit 20, are used for working as electric energy that energy collector unit 10 was collected carries out the output of electric energy when being less than predetermined threshold value, the voltage regulation unit 30, respectively with 10 draws of energy collector unit rechargeable battery unit 20 is connected, be used for with energy collector unit 10 or the electrical energy conversion of 20 outputs of rechargeable battery unit becomes the direct current of firm output, the utility model discloses simple structure, low cost are convenient for promote and use on thing networking product or intelligence wearing product.
Description
Technical field
This utility model relates to for electrical domain, specifically provides a kind of composite power supply device.
Background technology
Flourish along with technology of Internet of things and intelligence wearing technology, corresponding product emerges in an endless stream, and dysfunction is enriched, and battery is the most of increased attention as the heart providing power and payes attention to, and rechargeable battery can be recycled due to it, extremely users' favor.But greatly product only relies on rechargeable battery and to provide power for product in the market, this single powering mode also exists following deficiency: one is discharge and recharge serious curtailment service life of rechargeable battery frequently；The two increase battery capacities being as load increase the most accordingly, and this volume directly contributing product increases.
Therefore, how to increase the service life of rechargeable battery and reduce the volume of rechargeable battery, being a problem demanding prompt solution.
Utility model content
This utility model provides a kind of composite power supply device, to solve the rechargeable battery short technical problem with enlarged volume in service life.
The technical solution adopted in the utility model is as follows:
A kind of composite power supply device, it is characterised in that including:
Energy collection unit 10, is connected with exterior source of energy, for the electric energy collected and the described exterior source of energy of interim storage passes over, is additionally operable to the interim electric energy stored of output when the electric energy collected is more than or equal to the threshold value preset；
Rechargeable battery cell 20, for carrying out the output of electric energy when the electric energy that described energy collection unit 10 is collected is less than the threshold value preset；
Voltage-adjusting unit 30, is connected with described energy collection unit 10 and described rechargeable battery cell 20 respectively, for the electric energy that described energy collection unit 10 or described rechargeable battery cell 20 export is converted into the unidirectional current of stable output.
Further, described energy collection unit 10 includes:
Commutator unit 11, the alternating current in the electric energy described exterior source of energy collected passed over is converted to unidirectional current, and the electric energy that described exterior source of energy passes over is that the de minimis energy in nature is transformed；
Energy storage subelement 12, is connected with described commutator unit 11, stores the unidirectional current after described commutator unit 11 is changed for interim.
Further, described energy collection unit 10 also includes power supply switching subelement 13 and energy output subelement 14, described power supply switching subelement 13 includes the first switching tube Q1, described first switching tube Q1 and described energy storage subelement 12, described energy output subelement 14 is connected with described rechargeable battery cell 20, when the electric energy that described energy storage subelement 12 is collected is more than/is equal to the threshold value preset, turn on described first switching tube Q1, open described energy output subelement 14 to work, simultaneously turn off described rechargeable battery cell 20, the electric energy of collection is exported by described energy output subelement 14；When the electric energy that described energy storage subelement 12 is collected is less than the threshold value preset, end described first switching tube Q1, turn off described energy output subelement 14, open described rechargeable battery cell 20 simultaneously, described rechargeable battery cell 20 export electric energy.
Further, described energy output subelement 14 includes second switch pipe Q2 and the 3rd switching tube Q3, described second switch pipe Q2 and described 3rd switching tube Q3 is P-channel Metal-Oxide Semiconductor field effect transistor, the grid of described second switch pipe Q2 is connected with the grid of described 3rd switching tube Q3, the source electrode of described second switch pipe Q2 is connected with the source electrode of described 3rd switching tube Q3, the drain electrode of described second switch pipe Q2 is connected with described energy storage subelement 12, and the drain electrode of described 3rd switching tube Q3 is connected with voltage output end.
Further, described energy collection unit 10 also includes:
Dividing potential drop subelement 15, switches subelement 13 with described energy storage subelement 12 and described power supply and is connected, carry out dividing potential drop, to control conducting and the cut-off of described first switching tube Q1 for the unidirectional current storing described energy storage subelement 12.
Further, described dividing potential drop subelement 15 includes the first resistance R1 and the second resistance R2, described first switching tube Q1 is N-channel Metal-Oxide Semiconductor field effect transistor, one end of described first resistance R1 is connected with the grid of described first switching tube Q1, the other end of described first resistance R1 is connected with the source electrode of described first switching tube Q1, one end of described second resistance R2 is connected with the grid of described first switching tube Q1, the other end of described second resistance R2 is connected with described energy storage subelement 12, when cut-in voltage than or equal to described first switching tube Q1 of the voltage at described first resistance R1 two ends, described first switching tube Q1 conducting；When the voltage at described first resistance R1 two ends is less than the cut-in voltage of described first switching tube Q1, described first switching tube Q1 turns off.
Further, described energy collection unit 10 also includes:
Positive feedback subelement 16, is connected, for the grid voltage of the first switching tube Q1 described in lifting, to postpone the shut-in time of described first switching tube Q1 with described power supply switching subelement 13 and voltage output end.
Further, described rechargeable battery cell 20 is wireless charging battery.
This utility model has the advantages that
The composite power supply device that this utility model provides, can realize both energy collection unit and rechargeable battery cell switches to load to be powered, wherein, micro-energy outside energy collection unit collection is with to load supplying, not only save the energy, and reduce the working time of rechargeable battery, be conducive to extending the service life of rechargeable battery；And to a certain degree decrease the capacity requirement of battery, and then reduce rechargeable battery being taken up space on product.This utility model simple in construction, with low cost, it is simple to dress at Internet of Things product or intelligence and promote on product and use.
In addition to objects, features and advantages described above, this utility model also has other objects, features and advantages.Below with reference to figure, this utility model is described in further detail.
Accompanying drawing explanation
The accompanying drawing of the part constituting the application is used for providing being further appreciated by of the present utility model, and schematic description and description of the present utility model is used for explaining this utility model, is not intended that improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the functional block diagram of this utility model composite power supply device one embodiment；
Fig. 2 is the circuit diagram of this utility model composite power supply device one embodiment；And
Fig. 3 is rechargeable battery cell functional block diagram in this utility model composite power supply device one embodiment.
Detailed description of the invention
It should be noted that in the case of not conflicting, the embodiment in the application and the feature in embodiment can be mutually combined.Describe this utility model below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
See figures.1.and.2, preferred embodiment of the present utility model provides a kind of composite power supply device, including energy collection unit 10 and rechargeable battery cell 20, energy collection unit 10, it is connected with exterior source of energy, for the electric energy collected and interim storage exterior source of energy passes over, it is additionally operable to the electric energy of the interim storage of output when the electric energy collected is more than or equal to the threshold value preset；Rechargeable battery cell 20, for carrying out the output of electric energy when the electric energy that energy collection unit 10 is collected is less than the threshold value preset；And voltage-adjusting unit 30, it is connected with energy collection unit 10 and rechargeable battery cell 20 respectively, for the electric energy that energy collection unit 10 or rechargeable battery cell 20 export is converted into the unidirectional current of stable output, voltage-adjusting unit 30 has the wide input voltage range of 3-19V.Wherein, exterior source of energy is such as luminous energy, mechanical energy, heat energy and electromagnetic energy etc. in the de minimis energy in nature, such as nature, and energy collection unit 10 is responsible for collecting the electric energy converted and the electric energy collected being temporarily stored in energy storage device.In the present embodiment, the electric energy received from exterior source of energy is preferentially used, and only when the electric energy deficiency collected, i.e. when the electric energy collected is less than the threshold value preset, rechargeable battery just automatically engages, and exports cell voltage.
The composite power supply device that the present embodiment provides, uses the micro-energy outside energy collection unit collection with to load supplying, has not only saved the energy, and reduced the working time of rechargeable battery, be conducive to extending the service life of rechargeable battery；And to a certain degree decrease the capacity requirement of rechargeable battery cell, and then reduce rechargeable battery cell being taken up space on product.The present embodiment simple in construction, with low cost, it is simple to dress at Internet of Things product or intelligence and promote on product and use.
Further, as depicted in figs. 1 and 2, the composite power supply device that the present embodiment provides, energy collection unit 10 includes commutator unit 11, energy storage subelement 12, power supply switching subelement 13, energy output subelement 14, dividing potential drop subelement 15 and positive feedback subelement 16, wherein, commutator unit 11, the alternating current in the electric energy exterior source of energy collected passed over is converted to unidirectional current；Energy storage subelement 12, is connected with commutator unit 11, the unidirectional current after storing commutator unit 11 conversion.Commutator unit 11 includes that the first diode D1, the second diode D2, the 3rd diode D3 and the 4th diode D4, four diodes constitute rectifier bridge；Energy storage subelement 12 can be one or many ceramic condensers in parallel, it is also possible to is the super capacitor of one or many series connection.In the present embodiment, energy storage subelement 12 includes the first electric capacity C1, and the two ends of the first electric capacity C1 outfan with commutator unit 11 respectively is connected.Four diode composition rectifier bridges are responsible for outside alternating current be converted to unidirectional current and be stored in the first electric capacity C1.Power supply switching subelement 13 includes the first switching tube Q1, first switching tube Q1 is connected with energy storage subelement 12, energy output subelement 14 and rechargeable battery cell 20, the first switching tube Q1 is turned on when the voltage that energy storage subelement 12 is collected is more than the first rechargeable battery output threshold voltage preset, open energy output subelement 14 to work, simultaneously turn off rechargeable battery cell 20, energy output subelement 14 export the electric energy of collection；End the first switching tube Q1 when the voltage that energy storage subelement 12 is collected collects voltage less than the Second Threshold preset, turn off energy output subelement 14, open rechargeable battery cell 20 simultaneously, rechargeable battery cell 20 export cell voltage.Further, dividing potential drop subelement 15, switch subelement 13 with energy storage subelement 12 and power supply and be connected, carry out dividing potential drop, to control conducting and the cut-off of the first switching tube Q1 for the unidirectional current that energy storage subelement 12 is stored.Specifically, dividing potential drop subelement 15 includes the first resistance R1 and the second resistance R2, first switching tube Q1 is N-channel Metal-Oxide Semiconductor field effect transistor, one end of first resistance R1 is connected with the grid of the first switching tube Q1, the other end of the first resistance R1 is connected by the source electrode of the first switching tube Q1, one end of second resistance R2 is connected with the grid of the first switching tube Q1, the other end of the second resistance R2 is connected with energy storage subelement 12, when cut-in voltage than or equal to the first switching tube Q1 of the voltage at the first resistance R1 two ends, first switching tube Q1 conducting, rechargeable battery cell 20 turns off, the electric energy that energy output subelement 14 work output is collected；When the voltage at the first resistance R1 two ends is less than the cut-in voltage of the first switching tube Q1, the first switching tube Q1 turns off, and energy output subelement 14 turns off, and opens rechargeable battery cell 20.Positive feedback subelement 16, is connected, for the grid voltage of lifting the first switching tube Q1, to postpone the shut-in time of the first switching tube Q1 with power supply switching subelement 13 and voltage output end VO.In this embodiment in preferred version, positive feedback unit 16 includes that the 3rd resistance R3, one end of the 3rd resistance R3 are connected with the grid of the first switching tube Q1, and the other end of the 3rd resistance R3 is connected with voltage output end VO.nullEnergy output subelement 14 includes second switch pipe Q2、3rd switching tube Q3、4th resistance R4、5th resistance R5 and the 5th diode D5，Second switch pipe Q2 and the 3rd switching tube Q3 is P-channel Metal-Oxide Semiconductor field effect transistor，5th diode D5 is Schottky diode，The grid of second switch pipe Q2 and the grid of the 3rd switching tube Q3 are connected，The source electrode of second switch pipe Q2 and the source electrode of the 3rd switching tube Q3 are connected，The drain electrode of second switch pipe Q2 is connected with energy storage subelement 12，The drain electrode of the 3rd switching tube Q3 is connected with voltage output end VO，One end of 5th resistance R5 is connected with the source electrode of second switch pipe Q2，The other end of the 5th resistance R5 divides two-way，One tunnel is connected with the grid of second switch pipe Q2，Separately lead up to the 4th resistance R4、The drain electrode of the 5th diode D5 and the first switching tube Q1 is connected.Second switch pipe Q2 forms output switch together with the 3rd switching tube Q3, and its purpose connected back-to-back is that the electric current preventing voltage output end VO pours in down a chimney.
Further, as depicted in figs. 1 and 2, the composite power supply device that the present embodiment provides, rechargeable battery cell 20 includes the 6th resistance R6, 7th resistance R7, 6th diode D6, 4th switching tube Q4, 5th switching tube Q5 and the 6th switching tube Q6, 6th diode is Schottky diode, 4th switching tube Q1 is N-channel Metal-Oxide Semiconductor field effect transistor, 5th switching tube Q5 and the 6th switching tube Q6 is P-channel Metal-Oxide Semiconductor field effect transistor, one end of 6th resistance R6 is connected with cell voltage end VBAT, the other end of the 6th resistance R6 divides two-way, lead up to the 6th diode D6 and the first switching tube Q1 drain electrode be connected, the grid of another Lu Yu tetra-switching tube Q4 is connected；The drain electrode of the 4th switching tube Q4 is connected with the grid of the 5th switching tube Q5, the source ground of the 4th switching tube Q4；The drain electrode of the 5th switching tube Q5 is connected with cell voltage end VBAT, the grid of the 5th switching tube Q5 and the grid of the 6th switching tube Q6 are connected, the source electrode of the 5th switching tube Q5 and the source electrode of the 6th switching tube Q6 are connected, 7th resistance R7 is between grid and the source electrode of the 5th switching tube Q5, and the drain electrode of the 6th switching tube Q6 is connected with voltage output end VO.
The composite power supply device that the present embodiment provides, energy collection unit and rechargeable battery cell rely on whether the conducting of the first switching tube Q1 realizes collection of energy and the seamless switching of rechargeable battery composite power supply, also achieve the preferential function of supplying power of energy collection unit simultaneously.
Further, as in figure 2 it is shown, the composite power supply device circuit that the present embodiment provides, the operation principle of collection of energy and double loop power supply switching is as follows:
nullCollection of energy initial period，Second switch pipe Q2 and the 3rd switching tube Q3 in collection of energy switch are off，Accumulation along with energy，The voltage VEH at the first electric capacity C1 two ends gradually rises，First resistance R1 and the second resistance R2 series connection carries out dividing potential drop to VEH，When VEH value reaches the first rechargeable battery output threshold voltage VH，The voltage at the first resistance R1 two ends cut-in voltage more than the first switching tube Q1，First switching tube Q1 conducting,VEH is made to pass through the body diode of second switch pipe Q2、5th resistance R5、4th resistance R4、5th diode D5 and the first switching tube Q1 electric discharge，And then second switch pipe Q2、3rd switching tube Q3 is because the voltage at the two poles of the earth, grid source is negative value and turns on，The energy collected discharges，Now，Output voltage VO=VEH，The voltage VO of output exports the grid of the first switching tube Q1 further through the 3rd resistance R3 with the form of positive feedback，Even if so VEH can decline after releasing energy，The grid output voltage of the first switching tube Q1 also will not follow decline，The grid voltage of the first switching tube Q1 due to the positive feedback lifting that V0 comes，It is delayed the shut-in time of the first switching tube Q1，Thus create condition for energy release，That is the basic function that energy " is first collected and utilized afterwards " is achieved.Along with the release of collection energy, when the voltage of VEH drops to Second Threshold collection voltage VL, the grid voltage of the first switching tube Q1 is again unable to maintain that it turns on, and the first switching tube Q1 closes, and energy collection unit 10 enters the next collection cycle.
On the other hand, knowable to being analyzed above, as long as the first switching tube Q1 conducting, energy collection unit 10 just releases energy, otherwise just collects energy.During the first switching tube Q1 conducting, cell voltage end VBAT is discharged by the 6th resistance R6, the 6th diode D6 and the first switching tube Q1, thus drag down the grid voltage of the 4th switching tube Q4, the 4th switching tube Q4 is caused to turn off, cell voltage end VBAT is added on the grid of the 5th switching tube Q5 and the 6th switching tube Q6 by body diode and the 7th resistance R7 of the 5th switching tube Q5,5th switching tube Q5 and the 6th switching tube Q6 closes, and cell voltage end VBAT discharges without normal load.And when the first switching tube Q1 closes, cell voltage end VBAT is added on the grid of the 4th switching tube Q4 by the 6th resistance R6,4th switching tube Q4 conducting, same cell voltage end VBAT is discharged by the body diode of the 5th switching tube Q5, the 7th resistance R7, the 4th switching tube Q4, such 5th switching tube Q5 and the 6th switching tube Q6 is because gate source voltage is negative value and turns on, now, output voltage VO=VBAT, external loading is by rechargeable battery powered.As long as visible collection of energy VEH reaches the first rechargeable battery output threshold voltage VH, energy collection unit 10 power；When VEH drops to Second Threshold collection voltage VL, it is switched to rechargeable battery powered.Thus complete collection of energy and the seamless switching of rechargeable battery composite power supply, also achieve the function that collection of energy is preferentially powered.
Preferably, as shown in Figure 3, rechargeable battery cell 20 includes that wireless charging receives unit 201, charger unit 202 and battery unit 203, wireless charging receives unit 201 for receiving the electric energy that external wireless power supply unit launches, charger unit 202 receives unit 201 with wireless charging and battery unit 203 is connected, electric energy for utilizing wireless charging reception unit 201 to receive charges for battery unit 203, and wherein, the battery in battery unit 203 is preferably poly-lithium battery.
The foregoing is only preferred embodiment of the present utility model, be not limited to this utility model, for a person skilled in the art, this utility model can have various modifications and variations.All within spirit of the present utility model and principle, any modification, equivalent substitution and improvement etc. made, within should be included in protection domain of the present utility model.
Claims (8)
1. a composite power supply device, it is characterised in that including:
Energy collection unit (10), is connected with exterior source of energy, for the electric energy collected and the described exterior source of energy of interim storage passes over, is additionally operable to the interim electric energy stored of output when the electric energy collected is more than or equal to the threshold value preset；
Rechargeable battery cell (20), for carrying out the output of electric energy when the electric energy that described energy collection unit (10) is collected is less than the threshold value preset；
Voltage-adjusting unit (30), it is connected with described energy collection unit (10) and described rechargeable battery cell (20) respectively, for the electric energy that described energy collection unit (10) or described rechargeable battery cell (20) export being converted into the unidirectional current of stable output.
Composite power supply device the most according to claim 1, it is characterised in that described energy collection unit (10) including:
Commutator unit (11), the alternating current in the electric energy described exterior source of energy collected passed over is converted to unidirectional current, and the electric energy that described exterior source of energy passes over is that the de minimis energy in nature is transformed；
Energy storage subelement (12), is connected with described commutator unit (11), stores the unidirectional current after described commutator unit (11) is changed for interim.
Composite power supply device the most according to claim 2, it is characterised in that
Described energy collection unit (10) also includes power supply switching subelement (13) and energy output subelement (14), described power supply switching subelement (13) includes the first switching tube (Q1), described first switching tube (Q1) and described energy storage subelement (12), described energy output subelement (14) is connected with described rechargeable battery cell (20), when the electric energy that described energy storage subelement (12) is collected is more than/is equal to the threshold value preset, turn on described first switching tube (Q1), open described energy output subelement (14) work, simultaneously turn off described rechargeable battery cell (20), the electric energy collected by described energy output subelement (14) output；When the electric energy that described energy storage subelement (12) is collected is less than the threshold value preset, end described first switching tube (Q1), turn off described energy output subelement (14), open described rechargeable battery cell (20) simultaneously, described rechargeable battery cell (20) export electric energy.
Composite power supply device the most according to claim 3, it is characterised in that
Described energy output subelement (14) includes second switch pipe (Q2) and the 3rd switching tube (Q3), described second switch pipe (Q2) and described 3rd switching tube (Q3) are P-channel Metal-Oxide Semiconductor field effect transistor, the grid of described second switch pipe (Q2) is connected with the grid of described 3rd switching tube (Q3), the source electrode of described second switch pipe (Q2) is connected with the source electrode of described 3rd switching tube (Q3), the drain electrode of described second switch pipe (Q2) is connected with described energy storage subelement (12), the drain electrode of described 3rd switching tube (Q3) is connected with voltage output end.
Composite power supply device the most according to claim 3, it is characterised in that described energy collection unit (10) also includes:
Dividing potential drop subelement (15), switches subelement (13) with described energy storage subelement (12) and described power supply and is connected, carry out dividing potential drop, to control conducting and the cut-off of described first switching tube (Q1) for the unidirectional current storing described energy storage subelement (12).
Composite power supply device the most according to claim 5, it is characterised in that
Described dividing potential drop subelement (15) includes the first resistance (R1) and the second resistance (R2), described first switching tube (Q1) is N-channel Metal-Oxide Semiconductor field effect transistor, one end of described first resistance (R1) is connected with the grid of described first switching tube (Q1), the other end of described first resistance (R1) is connected with the source electrode of described first switching tube (Q1), one end of described second resistance (R2) is connected with the grid of described first switching tube (Q1), the other end of described second resistance (R2) is connected with described energy storage subelement (12), when the voltage at described first resistance (R1) two ends is than or equal to the cut-in voltage of described first switching tube (Q1), described first switching tube (Q1) turns on；When the voltage at described first resistance (R1) two ends is less than the cut-in voltage of described first switching tube (Q1), described first switching tube (Q1) turns off.
Composite power supply device the most according to claim 6, it is characterised in that described energy collection unit (10) also includes:
Positive feedback subelement (16), is connected, for the grid voltage of the first switching tube (Q1) described in lifting, to postpone the shut-in time of described first switching tube (Q1) with described power supply switching subelement (13) and voltage output end.
Composite power supply device the most according to claim 1, it is characterised in that described rechargeable battery cell (20) is wireless charging battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620035899.5U CN205509622U (en) | 2016-01-13 | 2016-01-13 | Compound power supply unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620035899.5U CN205509622U (en) | 2016-01-13 | 2016-01-13 | Compound power supply unit |
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| CN205509622U true CN205509622U (en) | 2016-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620035899.5U Withdrawn - After Issue CN205509622U (en) | 2016-01-13 | 2016-01-13 | Compound power supply unit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105515147A (en) * | 2016-01-13 | 2016-04-20 | 大连楼兰科技股份有限公司 | Composite power supply system |
| CN106972622A (en) * | 2017-05-24 | 2017-07-21 | 成都卓创科微电子有限公司 | Control circuit, the chip of dual power supply power switch path |
| CN110507354A (en) * | 2019-09-18 | 2019-11-29 | 无锡祥生医疗科技股份有限公司 | Energy saving ultrasonic probe, energy saving ultrasonic device and energy saving ultrasonic probe electricity-fetching method |
-
2016
- 2016-01-13 CN CN201620035899.5U patent/CN205509622U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105515147A (en) * | 2016-01-13 | 2016-04-20 | 大连楼兰科技股份有限公司 | Composite power supply system |
| CN105515147B (en) * | 2016-01-13 | 2018-03-06 | 大连楼兰科技股份有限公司 | A kind of composite power supply system |
| CN106972622A (en) * | 2017-05-24 | 2017-07-21 | 成都卓创科微电子有限公司 | Control circuit, the chip of dual power supply power switch path |
| CN106972622B (en) * | 2017-05-24 | 2023-11-28 | 江阴元灵芯旷微电子技术有限公司 | Control circuit and chip of dual-power switch path |
| CN110507354A (en) * | 2019-09-18 | 2019-11-29 | 无锡祥生医疗科技股份有限公司 | Energy saving ultrasonic probe, energy saving ultrasonic device and energy saving ultrasonic probe electricity-fetching method |
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