CN102255513B - Bridge type synchronous rectification circuit - Google Patents
Bridge type synchronous rectification circuit Download PDFInfo
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- CN102255513B CN102255513B CN2011101944365A CN201110194436A CN102255513B CN 102255513 B CN102255513 B CN 102255513B CN 2011101944365 A CN2011101944365 A CN 2011101944365A CN 201110194436 A CN201110194436 A CN 201110194436A CN 102255513 B CN102255513 B CN 102255513B
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- switching tube
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- current
- brachium pontis
- bridge
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- 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
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
- H02M3/33573—Full-bridge at primary side of an isolation transformer
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- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0009—Devices or circuits for detecting current in a converter
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- 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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal 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
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal 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
- H02M7/219—Conversion of ac power input into dc power output without possibility of reversal 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 in a bridge configuration
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Rectifiers (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a bridge type synchronous rectification circuit. A current detection circuit of the conventional synchronous rectification circuit is improved, and comprises a current transformer, a first diode, a second diode, a fifth switch tube and a sixth switch tube, wherein a first winding of the current transformer spans between the middle points of two bridge arms of a bridge type rectification circuit; the drain of the fifth switch tube is connected with the anode of the first diode; the drain of the sixth switch tube is connected with the anode of the second diode; the cathode of the first diode is connected with the cathode of the second diode; the source of the fifth switch tube and the source of the sixth switch tube are grounded; the two ends of a second winding of the current transformer are connected with the anodes of the first diode and the second diode respectively; and the second winding of the current transformer is short-circuited when the circuit is under an idle load by controlling the switch-on and switch-off of the fifth switch tube and the sixth switch tube.
Description
Technical field
The present invention relates to a kind of bridge synchronization rectification circuit.
Background technology
The market demand of low-voltage and high-current high power density is ordered about, and bridge synchronization rectification uses and becomes more and more extensive.Because high efficiency needs, the power supply duty ratio all is operated in the even whole course of work of low pressure input under nearly 100% duty ratio.If at this time electric current loop is placed on (circuit diagram as shown in Figure 1) between two brachium pontis and input capacitance, electric current loop enters the magnetic saturation state resetting time and can't carry out current detecting with regard to losing.
When electric current loop is placed on (circuit diagram as shown in Figure 2) between two brachium pontis, bridge rectifier makes the electric current of current flowing ring two directions to be detected by electric current loop.Power work is when zero load or underloading, and there is reverse current (crossing the afterflow inductance to the electric current on ground from output stream) in the afterflow inductance, and this electric current is opened the change of subsequent flows inductive current at former limit switching tube and just also detected by electric current loop forward.Therefore in switch periods, electric current loop detects an electric current that changes from small to big again from large to small.When using the current-mode control chip, just relatively vibrate because exist same period two waveforms to carry out PWM.
Summary of the invention
Technical problem to be solved by this invention is, a kind of bridge synchronization rectification circuit is provided, and when avoiding the electric current loop of testing circuit to be placed between input capacitance and switching tube, causes the irreducible problem of electric current loop because duty ratio is excessive; Or electric current loop is when being placed between two brachium pontis, because electric current loop detects normally steady operation problem of negative current.
Technological means of the present invention is solved by the following technical programs:
A kind of bridge synchronization rectification circuit, comprise the bridge rectifier of isolating transformer, the former avris of isolating transformer, the current mode pwm control circuit module of this bridge rectifier, synchronous rectification output circuit and the current detection circuit of isolating transformer secondary side, described bridge circuit comprises the first brachium pontis and the second brachium pontis, described the first brachium pontis comprises the first switching tube and second switch pipe, wherein:
Described current detection circuit comprises current transformer, the first diode, the second diode, the 5th switching tube, the 6th switching tube and the first resistance; The first winding of described current transformer is connected across between the mid point of the mid point of described the first brachium pontis and described the second brachium pontis, the anodic bonding of the drain electrode of described the 5th switching tube and described the first diode, the anodic bonding of the drain electrode of described the 6th switching tube and described the second diode, the negative electrode of the negative electrode of described the first diode, the second diode be connected the first end of resistance and connect, the second end ground connection of the source electrode of the source electrode of described the 5th switching tube, described the 6th switching tube and described the first resistance; The two ends of the second winding of described current transformer respectively with the anodic bonding of described the first diode, the second diode;
Described the first switching tube and described the 6th switching tube be break-make simultaneously, described second switch pipe and described the 5th switching tube be break-make simultaneously, and described current mode pwm control circuit module is used for according to the voltage swing at described the first resistance two ends, described bridge rectifier being carried out pulse-width modulation.
Preferably, described current detection circuit also comprises the second resistance and electric capacity, the first end of described the second resistance connect all with described the first diode be connected the tie point of diode and be connected, the second end of described the second resistance is connected with the first end of described electric capacity, the second end ground connection of described electric capacity, the signal input part of described current mode pwm control circuit module is connected with the first end of described electric capacity.
For full-bridge circuit, in the situation of the second brachium pontis by the 3rd switching tube and the 4th switching tube, the 4th switching tube should with described the first switching tube break-make simultaneously, the 3rd switching tube should with described second switch pipe break-make simultaneously.
The present invention is applicable to half-bridge circuit too, and is after for example the 3rd switching tube in such scheme and the 4th switching tube substitute with electric capacity, applicable too.
Preferably, described the first switching tube, second switch pipe, the 3rd switching tube, the 4th switching tube, the 5th switching tube, the 6th switching tube are metal-oxide-semiconductor.
The present invention's beneficial effect compared with prior art comprises: empty underloading work, when former limit switching tube is opened and electric current in secondary afterflow inductance when being negative sense, pass through Q6, the short circuit of Q7, make electric current loop can't detect reverse current and forward current only detected (waveform is referring to accompanying drawing 5, current mode pwm control circuit module only can respond to the forward electric current, guarantees the power supply normal operation.) power supply can stably work under near 100% high duty ratio, utilizes fully transformer, improves power-efficient.Do not need to add anti-direct current biasing electric capacity between power supply two brachium pontis, simplified circuit, reduced circuit cost, make in very little pcb board space and use the full-bridge synchronous rectification circuit to become possibility.
Description of drawings
Fig. 1 is the circuit diagram of the first bridge synchronization rectification circuit of prior art;
Fig. 2 is the circuit diagram of the second bridge synchronization rectification circuit of prior art;
Fig. 3 is the circuit diagram of the bridge synchronization rectification circuit of the specific embodiment of the invention 1;
The oscillogram corresponding to input voltage signal CS of brachium pontis control signal H01/L02, H02/L01, afterflow inductor current signal IL1, current transformer winding TRS1-A current signal and current mode PWM chip when Fig. 4 is the bridge synchronization rectification circuit output no-load of Fig. 2;
The oscillogram corresponding to input voltage signal CS of brachium pontis control signal H01/L02, H02/L01, afterflow inductor current signal IL1, current transformer winding TRS1-A current signal and current mode PWM chip when Fig. 5 is the bridge synchronization rectification circuit output no-load of Fig. 3;
Fig. 6 is the circuit diagram of the bridge synchronization rectification circuit of the specific embodiment of the invention 2.
Embodiment
The below's contrast accompanying drawing also is explained in detail the present invention in conjunction with preferred embodiment.
As shown in Figure 3, bridge synchronization rectification circuit of the present invention is comprised of the bridge rectifier of input capacitance, isolating transformer, the former avris of isolating transformer, the current mode pwm control circuit module of this bridge circuit, synchronous rectification output circuit and the current detection circuit of isolating transformer secondary side.
the bridge circuit of the present embodiment is full-bridge circuit, this full-bridge circuit comprises by the first switching tube Q1 and second switch pipe Q2 and forms the first brachium pontis, and the second brachium pontis that is comprised of the 3rd switching tube Q3 and the 4th switching tube Q4 forms, input capacitance C3 is connected across the two ends of these two brachium pontis and is connected with the positive-negative input end of input power, the T1-A two ends, former limit of isolating transformer connect respectively the mid point of the first brachium pontis and the mid point of the second brachium pontis, the synchronous rectification output circuit is by secondary T1-B/T1-C and the full-bridge circuit coupling of isolating transformer, output circuit can adopt existing synchronous rectification output circuit, it comprises afterflow inductance L 1.
Current detection circuit comprises current transformer (also referred to as electric current loop), the first diode D1, the second diode D2, the 5th switching tube Q5, the 6th switching tube Q6 and the first resistance R 1; The first winding TRS1-B of described current transformer is connected across between the mid point of the mid point of described the first brachium pontis and the second brachium pontis, the anodic bonding of the drain electrode of described the 5th switching tube Q5 and described the first diode D1, the anodic bonding of the drain electrode of described the 6th switching tube and described the second diode, described the first diode is connected with the first end of described the first resistance R 1 after the negative electrode of diode is connected with being connected, and the second end of described the first resistance R 1, the source electrode of described the 5th switching tube, reaches the source ground of described the 6th switching tube; The two ends of the second winding TRS1-A of described current transformer respectively with the anodic bonding of described the first diode D1, the second diode D2; This testing circuit also is provided with the second resistance R 2 and the capacitor C 1 for filtering, and the two ends of resistance R 2 are connected with the first end of the first resistance R 1, capacitor C 1 respectively, the second end ground connection of capacitor C 1.
The signal input part CS of current mode pwm control circuit module is connected with the first end of capacitor C 1.
Current mode pwm control circuit module is comprised of current mode PWM chip, the first driver, the second driver; Two signal output part HO1, LO1 of the first driver are connected with the control end of the first switching tube Q1, the control end of second switch pipe Q2 respectively, and two signal output part HO2, LO2 of the second driver are connected with the control end of the 3rd switching tube Q3, the control end of the 4th switching tube Q4 respectively; Current mode PWM chip comprises two signal output part OUTA and OUTB, wherein OUTA is connected with the input HI1 of the first driver, the input LI2 of the second driver, the control end of the 6th switching tube Q6, and OUTB is connected with the input LI1 of the first driver, the input HI2 of the second driver, the control end of the 5th switching tube Q5.The signal of the signal output part OUTA output of current mode PWM chip inputs to respectively the first driver, the second driver by the input HI1 of the first driver, the input LI2 of the second driver, by the output HO1 of the first driver, the output LO2 output of the second driver, the signal of OUTA output simultaneously also directly exports the control end of the 6th switching tube Q6 to after signal amplifies; The signal of the signal output part OUTB output of current mode PWM chip inputs to respectively the first driver, the second driver by the input LI1 of the first driver, the input HI2 of the second driver, after amplifying, exported by the output LO1 of the first driver, the output HO2 of the second driver signal, the signal of OUTB output simultaneously also directly exports the control end of the 5th switching tube Q5 to, that is: the first switching tube Q1, the 4th switching tube Q4 and the 6th switching tube Q6 while break-make, second switch pipe Q2, the 3rd switching tube Q3 and the 5th switching tube Q5 while break-make.
the circuit working principle of the present embodiment is: normally band year (inductive current is to flow to output from the Transformer Winding all the time) principle when working is: when the signal output OUTA of current mode PWM chip exports high level, the signal output part HO1 of the first driver, the signal output part LO2 of the second driver goes out height, the first switching tube Q1, the 4th switching tube Q4 conducting simultaneously, the first winding of electric current loop TRS1-B(current transformer) electric current in flows to 6 pin (being the forward circulation) from 5 pin, the 6th also conducting of switching tube Q6, the second winding of electric current loop TRS1-A(current transformer) in, electric current flows to 3 pin from 2 pin, flow to the signal input part CS of current mode PWM chip through the first diode D1, compared to carrying out PWM by current mode PWM chip detection.In the present embodiment, the variation of current detection circuit by the current value of the first resistance R 1, first diode of flowing through is converted to the change in voltage at the first resistance R 1 two ends, (effect of the second resistance R 2 and capacitor C 1 only is filtering to the voltage of current mode PWM chip by gathering the first resistance R 1 two ends, its resistance and electric capacity should be excessive and affect the basic waveform of the first resistance R 1 both end voltage), and compare to realize that with default magnitude of voltage the PWM to bridge rectifier controls.At this moment the circuit working of embodiment is identical with the circuit of prior art in accompanying drawing 2.When OUTB goes out high level, the work of power supply another one brachium pontis, principle is the same with upper surface analysis.
Principle is when power work zero load or underloading: when the signal output part OUTA of current mode PWM chip and OUTB output be all when hanging down, former limit two brachium pontis are not worked, at this time two of the synchronous rectification output circuit all conductings of switching tube Q7, Q8, electric current in afterflow inductance L 1 slowly is reduced to zero from the forward maximum, be backwards to the negative sense maximum by zero, when reverse current is maximum, two signal output part OUTA of current mode PWM chip and OUTB have an output high level, and namely HO1/LO2 and HO2/LO1 have one to go out height.Be assumed to be OUTA output high level (being that HO1/LO2 goes out height), at this moment Q1, the Q4 conducting, because it is maximum that inductance L 1 electric current is negative sense, so the electric current in the first winding TRS1-B of current transformer flows to 5 pin (being reverse circulated) from 6 pin, in corresponding TRS1-A, electric current flows to 2 pin from 3 pin, the 6th also conducting of switching tube Q6, so current direction ground and without D2, electric current loop the second winding TRS1-A is equivalent to by short circuit, current mode PWM chip can not detect the electric current of negative sense.Lengthen along with OUTA goes out the high time, the electric current in inductance is slowly less of zero from reverse maximum, then strengthens to forward from zero.After inductive current became zero, the electric current in electric current loop TRS1-B flowed to 6 pin from 5 pin, the Q6 conducting, and in electric current loop TRS1-A, electric current flows to 3 pin from 2 pin, flows to CS by D1, is compared to carrying out PWM by current mode PWM chip detection.This process hockets repeatedly.
As seen, key of the present invention is that the 5th switching tube Q5, the 6th switching tube Q6 in accompanying drawing 3 substituted two diode D3, D4 in accompanying drawing 2, and the conducting of the 5th switching tube Q5, the 6th switching tube Q6 is controlled.Before substituting, empty underloading work is opened and electric current in secondary afterflow inductance L 1 when being negative sense when former limit switching tube, is detected the comparison of the PWM that has participated in current mode PWM chip by electric current loop, cause two current waveforms of a switch periods (referring to accompanying drawing 4), PWM can't normally vibrate.After substituting, empty underloading work, when former limit switching tube is opened and electric current in secondary afterflow inductance when being negative sense, conducting by the 5th switching tube Q5, the 6th switching tube Q6 is with electric current loop TRS1-A short circuit, make electric current loop can't detect reverse current and forward current (waveform is referring to accompanying drawing 5) only detected, the assurance power supply is worked normally.
As shown in Figure 6, the present embodiment only is bridge circuit partly and the annexation of corresponding current mode pwm control circuit module with the difference of embodiment 1, the bridge circuit of the present embodiment is half-bridge circuit, the 3rd switching tube and the 4th switching tube in embodiment 1 have been substituted with two capacitor C 2, C3, simultaneously corresponding the second driver of removing in embodiment 1.
Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that concrete enforcement of the present invention is confined to these explanations.For those skilled in the art, without departing from the inventive concept of the premise, can also make some being equal to substitute or obvious modification, and performance or purposes identical, all should be considered as belonging to protection scope of the present invention.
Claims (5)
1. bridge synchronization rectification circuit, comprise the bridge rectifier of isolating transformer, the former avris of isolating transformer, the current mode pwm control circuit module of this bridge rectifier, synchronous rectification output circuit and the current detection circuit of isolating transformer secondary side, described bridge rectifier comprises the first brachium pontis and the second brachium pontis, described the first brachium pontis comprises the first switching tube and second switch pipe, it is characterized in that:
Described current detection circuit comprises current transformer, the first diode, the second diode, the 5th switching tube, the 6th switching tube and the first resistance; The first winding of described current transformer is connected across between the mid point of the mid point of described the first brachium pontis and described the second brachium pontis, the anodic bonding of the drain electrode of described the 5th switching tube and described the first diode, the anodic bonding of the drain electrode of described the 6th switching tube and described the second diode, the negative electrode of the negative electrode of described the first diode, the second diode be connected the first end of resistance and connect, the second end ground connection of the source electrode of the source electrode of described the 5th switching tube, described the 6th switching tube and described the first resistance; The two ends of the second winding of described current transformer respectively with the anodic bonding of described the first diode, the second diode;
Described the first switching tube and described the 6th switching tube be break-make simultaneously, described second switch pipe and described the 5th switching tube be break-make simultaneously, and described current mode pwm control circuit module is used for according to the size of current of described the first diode of flowing through, described bridge rectifier being carried out pulse-width modulation.
2. bridge synchronization rectification circuit according to claim 1, it is characterized in that: described current detection circuit also comprises the second resistance and the electric capacity for filtering, the first end of described the second resistance and described the first diode be connected the tie point of diode and be connected, the second end of described the second resistance is connected with the first end of described electric capacity, the second end ground connection of described electric capacity, the signal input part of described current mode pwm control circuit module is connected with the first end of described electric capacity.
3. bridge synchronization rectification circuit according to claim 1, it is characterized in that: described the second brachium pontis comprises the 3rd switching tube and the 4th switching tube, described the 4th switching tube and described the first switching tube be break-make simultaneously, and described the 3rd switching tube and described second switch pipe be break-make simultaneously.
4. bridge synchronization rectification circuit according to claim 1, it is characterized in that: described the second brachium pontis comprises two electric capacity that are connected in series.
5. bridge synchronization rectification circuit according to claim 3, it is characterized in that: described the first switching tube, second switch pipe, the 3rd switching tube, the 4th switching tube, the 5th switching tube, the 6th switching tube are metal-oxide-semiconductor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011101944365A CN102255513B (en) | 2011-07-12 | 2011-07-12 | Bridge type synchronous rectification circuit |
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| CN2011101944365A CN102255513B (en) | 2011-07-12 | 2011-07-12 | Bridge type synchronous rectification circuit |
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| CN102255513A CN102255513A (en) | 2011-11-23 |
| CN102255513B true CN102255513B (en) | 2013-05-08 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105099230B (en) | 2014-04-16 | 2018-07-31 | 华为技术有限公司 | Controlled resonant converter and its synchronous rectification translation circuit |
| CN105337260A (en) * | 2014-08-13 | 2016-02-17 | 中兴通讯股份有限公司 | Backward flowing current control method, backward flowing current control circuit and power converter |
| CN109731223B (en) * | 2019-01-31 | 2023-02-24 | 大悦创新（苏州）医疗科技股份有限公司 | Circuit and neuromuscular electrical stimulation device with same |
| CN113067457B (en) * | 2021-06-03 | 2021-09-24 | 浙江富特科技股份有限公司 | Current sampling circuit based on bridge circuit |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1514253A (en) * | 2003-08-15 | 2004-07-21 | 艾默生网络能源有限公司 | Current mutual induction sampliing circuit and its resetting method |
| CN101286415A (en) * | 2008-01-29 | 2008-10-15 | 艾默生网络能源有限公司 | A bidirectional sample and reset circuit for a current mutual inductor |
| JP2009171752A (en) * | 2008-01-17 | 2009-07-30 | Toyota Industries Corp | Power supply circuit |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1514253A (en) * | 2003-08-15 | 2004-07-21 | 艾默生网络能源有限公司 | Current mutual induction sampliing circuit and its resetting method |
| JP2009171752A (en) * | 2008-01-17 | 2009-07-30 | Toyota Industries Corp | Power supply circuit |
| CN101286415A (en) * | 2008-01-29 | 2008-10-15 | 艾默生网络能源有限公司 | A bidirectional sample and reset circuit for a current mutual inductor |
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Address after: 518055 Shenzhen City, Shenzhen, Guangdong, Nanshan District Taoyuan street, Liu Xian Avenue, No. 1268 honghualing industrial North District, 1 Patentee after: Shenzhen holdluck-zyt supply technology Limited by Share Ltd Address before: 518055 Shenzhen City, Shenzhen, Guangdong, Nanshan District Taoyuan street, Liu Xian Avenue, No. 1268 honghualing industrial North District, 1 Patentee before: ShenZhen VAPEL Power Supply Technology Co., Ltd. |
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| CP02 | Change in the address of a patent holder | ||
| CP02 | Change in the address of a patent holder |
Address after: 518116 Shenzhen, Longgang, Guangdong Longgang District, Baolong Industrial Zone, Longgang Road, three road 4, A Building 1, 2 floor B building 3, 4 floor C building 3, 4 Building D Patentee after: Shenzhen holdluck-zyt supply technology Limited by Share Ltd Address before: 518055 Shenzhen City, Shenzhen, Guangdong, Nanshan District Taoyuan street, Liu Xian Avenue, No. 1268 honghualing industrial North District, 1 Patentee before: Shenzhen holdluck-zyt supply technology Limited by Share Ltd |