CN207156960U - A kind of the Vehicular charger main circuit and its control loop of integrated DC/DC converters - Google Patents

A kind of the Vehicular charger main circuit and its control loop of integrated DC/DC converters Download PDF

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Publication number
CN207156960U
CN207156960U CN201720831970.5U CN201720831970U CN207156960U CN 207156960 U CN207156960 U CN 207156960U CN 201720831970 U CN201720831970 U CN 201720831970U CN 207156960 U CN207156960 U CN 207156960U
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winding
transistor
power
converters
battery pack
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张凯旋
胡烨
朱建国
李晨光
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SHENZHEN WINLINE TECHNOLOGY Co Ltd
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SHENZHEN WINLINE TECHNOLOGY Co Ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/70Energy storage systems for electromobility, e.g. batteries

Abstract

The utility model proposes a kind of the Vehicular charger main circuit and its control loop of new integrated DC/DC converters, and DC/DC converters and vehicle-mounted OBC are done and electrically integrated, and can realize the two-way biography energy of vehicle-mounted OBC;Control strategy in battery side using synchronous rectification+PWM pulsewidth modulations hair ripple in addition, improves DC/DC functional module efficiency to a greater extent;And machine volume is significantly reduced, cost is substantially reduced, power density significantly improves, reliability is further lifted.

Description

A kind of the Vehicular charger main circuit and its control loop of integrated DC/DC converters
Technical field
A kind of Vehicular charger is the utility model is related to, a kind of integrated the vehicle-mounted of DC/DC converters is more particularly related to and fills Motor main circuit and its control loop.
Background technology
In recent years, flourishing with electric automobile industry, vehicle electronic device is in miniaturization, integrated, high power Densification trend.Particularly vehicle-mounted OBC (On Board Charge) chargers and vehicle-mounted DC/DC, as whole electric automobile Electric energy Switching Core part, active demand miniaturization, Highgrade integration.
Fig. 1 is the scheme that currently used vehicle-mounted OBC and vehicle-mounted DC/DC realizes physical integration, although the program saves Section structural and port distribution, but substantial amounts of electrical equipment is stilled need, cost is high, volume is big, and integration degree is relatively low.Such as figure Shown in 1, civil power input passes through EMC filter circuit, single phase rectifier circuit, PFC power factor correction circuits, OBC input side on-off circuits Electrokinetic cell is transferred energy into OBC main transformers, then by OBC outlet sides rectification circuit, OBC output filter circuits Energy is passed to DC/DC by group, power battery pack by DC/DC input sides EMC filter circuit, DC/DC input side on-off circuits Main transformer, and energy is passed through by DC/DC outlet sides rectification circuit, DC/DC outlet side filtered electricals by DC/DC main transformers Road is transferred to battery and load.Existing electrically Integrated Solution can only realize the simple function of battery charging, can not meet The diversified demand of reality.
Utility model content
This proposition a kind of the Vehicular charger main circuit and its control loop of new integrated DC/DC converters, by DC/DC Converter and vehicle-mounted OBC do electrically integrated, realize that machine volume significantly reduces, cost substantially reduces, power density is notable Improve, reliability is further lifted.
Meanwhile the utility model can realize the two-way biography of energy between exchange input side power network and DC side power battery pack Pass, possess two-way vehicle-mounted OBC functions.
Charger main circuit of the present utility model, filled as shown in Fig. 2 civil power integrates the vehicle-mounted of DC/DC converters by this Motor main circuit carries out the vehicle-mounted charge owner electricity of Two-way energy transfer, the wherein integrated DC/DC converters with power battery pack Road includes OBC/DCDC main transformers and DC/DC outlet side rectification circuits, OBC/DCDC main transformers transfer energy to DC/DC outlet side rectification circuits, DC/DC outlet side rectification circuits transfer energy to automobile storage battery and load, and this is integrated The Vehicular charger main circuit of DC/DC converters includes charging electric vehicle state, power battery pack gives storage battery power supply state And three kinds of working conditions of automobile power cell group energy-feedback power grid.Wherein OBC/DCDC main transformers include primary side around Group, the first vice-side winding and the second vice-side winding, primary side winding are civil power input side, and the first vice-side winding output connection automobile moves Power battery pack, the second vice-side winding output connection Vehicular accumulator cell;DC/DC outlet sides rectification circuit includes the crystalline substance of common source configuration Body pipe Q9, Q10 and Q11, Q12, transistor Q9, Q10, Q11 and Q12 form full-wave rectification, connected with the second vice-side winding, and defeated Go out Vehicular accumulator cell side electrochemical capacitor Cout parallel connections, there is provided Vehicular accumulator cell output voltage Vbat_Pb;Transistor Q1, Q2, Q3, Q4 forms CLLC input sides and switchs, primary side winding and electromagnetic relay RLY1, input in parallel with the big electrochemical capacitor C_bus of bus Side resonant inductance Lr1, input side resonant capacitance Cr1 connect, and jump to the input side switch of transistor Q1, Q2, Q3, Q4 composition On;Transistor Q5, Q6, Q7, Q8 form CLLC output power battery packs side full bridge rectifier, and electricity is electrolysed with power battery pack side It is in parallel to hold Co_bat, exports Vbat_Li and is charged to power battery pack, the first vice-side winding, output power battery pack side resonance electricity Feel Lr2, the side resonant capacitance Cr2 series connection of output power battery pack, and jump to transistor Q5, Q6, Q7, Q8 and form CLLC outputs In the full bridge rectifier of power battery pack side.
The utility model additionally provides a kind of vehicle-mounted charge for being used to control claim 1-8 integrated DC/DC converters The control loop of owner's circuit, including main control MCU, isolation circuit, drive circuit, sample circuit, relay and transistor Q1-Q12, using the control of PWM pulse-width adjustments is superimposed on CLLC double-direction controls and battery side synchronous rectification control, realize to collection Into the double loop control of the Vehicular charger main circuit of DC/DC converters.Wherein sample circuit includes primary side sampling, power electric The major loop sampling of pond group side, the sampling of battery side ring road.
Brief description of the drawings
Fig. 1 is the vehicle-mounted OBC+DC/DC physical integrations mode of prior art;
Fig. 2 is the vehicle-mounted electric integration modes of OBC+DC/DC of the present utility model;
Fig. 3 is the vehicle-mounted electric Integrated Solution main circuit topologies of OBC+DC/DC of the present utility model;
Fig. 4 is OBC+DC/DC main circuits control loop of the present utility model;
Fig. 5 is hair ripple mode of the main circuit control loop in working condition 1;
Fig. 6 is that main circuit control loop sends out ripple mode in working condition 2;
Fig. 7 is that main circuit control loop sends out ripple mode in working condition 3.
Embodiment
The utility model uses two-way CLLC control technologies, and it is defeated as DC/DC to increase a vice-side winding in main transformer Go out side winding, to battery and load supplying, to realize that OBC electrically integrates with DC/DC.It is as shown in Figure 3 that circuit is embodied.
Fig. 3 topology device descriptions:T1 is the main transformer that vehicle-mounted OBC+DC/DC is integrated, and includes three windings, primary side winding 1 is civil power input side, and the output connection automobile power cell group of vice-side winding 2, vice-side winding 3, which exports, connects Vehicular accumulator cell; C_ Bus is the big electrochemical capacitor of bus, and Co_bat is power battery pack side electrochemical capacitor, and Cout is output Vehicular accumulator cell side electrolysis electricity Hold;Q1, Q2, Q3, Q4 are that CLLC input sides switch N-type MOSFET, Q5, Q6, Q7, Q8 are that CLLC output power battery packs side is complete Bridge rectification N-type MOSFET, Q9, Q10, Q11, Q12 are output battery side full-wave rectification N-type MOSFET, Q9 and Q10, Q11 and Q12 uses common source configuration;RLY1 is electromagnetic relay;Lr1 is input side resonant inductance, and Cr1 is input side resonant capacitance; Lr2 is output power battery pack side resonant inductance, and Cr2 is output power battery pack side resonant capacitance.
Control strategy of the present utility model is as follows:
Working condition 1:When electric automobile is in charged state
Now relay RLY1 is closed, and inputs prime rectification circuit and 220Vac alternating voltages are transformed into surely by pfc circuit Fixed Vbus DC voltages, main transformer T1 primary side winding 1 is energy input side, and vice-side winding 2 and vice-side winding 3 are output Side.Q1, Q2, Q3, Q4 are that full-bridge CLLC is controlled to secondary biography energy;Q5, Q6, Q7, Q8 are output synchronous rectification control, are exported Vbat_Li charges to power battery pack;Q9 and Q10, Q11 and Q12 are adjusted by synchronous rectification+PWM to control output voltage Vbat_Pb, charged to Vehicular accumulator cell.It is achieved thereby that vehicle-mounted OBC functions.
Working condition 2:Power battery pack gives storage battery power supply state
Now relay RLY1 disconnects, and primary side winding 1 is in open-circuit condition, and vice-side winding 2 is energy input side, secondary around Group 3 is outlet side.Q1, Q2, Q3, Q4 driving are closed, primary side is in and is fully disconnected state;Now Q5, Q6, Q7, Q8 are input The switching tube of full-bridge LLC controls, automobile power cell group are in discharge condition;Q9 and Q10, Q11 and Q12 pass through synchronous rectification Stable voltage Vbat_Pb is exported, is charged to Vehicular accumulator cell, so as to realize the function of vehicle-mounted DC/DC converters.
Working condition 3:Automobile power cell group energy-feedback power grid
Now relay RLY1 is closed, and primary side winding 1 is energy-feedback power grid outlet side, and vice-side winding 2 is electrokinetic cell Group energy input side, vice-side winding 3 are Vehicular accumulator cell charging outlet side, and Q5, Q6, Q7, Q8 are the CLLC controls of input full-bridge Switching tube, power battery pack is in discharge condition, by energy-feedback power grid;Q1, Q2, Q3, Q4 control for full-bridge synchronous rectification, defeated Go out control output busbar voltage Vbus;Now Q9 and Q10, Q11 and Q12 may be at off-state, can also be same by all-wave Rectification+PWM adjustment controls output burning voltage Vbat_Pb is walked, is charged to Vehicular accumulator cell., will so as to realize two-way OBC functions The energy-feedback power grid of power battery pack.
In order to realize the technical solution of the utility model, more engineering technology workers are allowed to be readily understood by and using this reality With new, specific embodiment and control program will be combined, operation principle of the present utility model is expanded on further.
The utility model is a kind of OBC and DC/DC integrated topologicals applied to the vehicle-mounted power supply of electric automobile, will be realized vehicle-mounted OBC and DC/DC are electrically integrated, improve existing vehicle power function is single, number of devices is huge, manufacturing cost is high, take The shortcomings of volume is big.And two-way vehicle-mounted OBC functions will be realized, in power network on electric automobile power battery group charge function, Increase the function of electric automobile power battery group energy-feedback power grid.
Fig. 4 is the specific control mode of the utility model, and the utility model is controlled using double loop, and major loop is that CLLC is two-way Control, battery side ring road is that the control of PWM pulse-width regulateds is superimposed in battery side synchronous rectification control, to ensure battery side Output voltage high voltage stability precision can be realized.
In working condition 1:Electric automobile is in charged state
Electromagnetic relay RLY1 is closed, and main MCU is by sampling Vbat_Li magnitudes of voltage and power battery pack side output current Value, PFM frequencies regulative mode control (Q1, Q2, Q3, Q4) is carried out, realize that CLLC controls pass energy.Power battery pack side secondary simultaneously (Q5, Q6, Q7, Q8), can with opened after (Q1, Q2, Q3, Q4) first close by way of realize synchronous rectification.Battery side secondary (Q9, Q10, Q11, Q12) increases PWM pulsewidth modulations and turned off in advance with (Q5, Q6, Q7, Q8) while open-minded.Specific control Hair ripple is shown in Fig. 5.
In working condition 2:Power battery pack gives storage battery power supply state
Electromagnetic relay RLY1 is disconnected, and main MCU is entered by sampling Vbat_Pb magnitudes of voltage and battery side output current value Row PFM frequencies regulative mode controls (Q5, Q6, Q7, Q8), realizes that LLC controls pass energy.Now civil power input side primary side (Q1, Q2, Q3, Q4) close driving.Battery side secondary (Q9, Q10, Q11, Q12) closes strategy and realizes synchronous rectification afterwards by first opening, and works as increasing Benefit can realize voltage stabilizing when too high by PWM pulsewidth modulations.Specific control hair ripple is shown in Fig. 6.
In working condition 3:Automobile power cell group energy-feedback power grid
Electromagnetic relay RLY1 is closed, and main MCU carries out PFM frequencies by sampling Vbus magnitudes of voltage and primary side output current value Rate regulative mode controls (Q5, Q6, Q7, Q8), realizes that CLLC controls pass energy, the energy back electric discharge of power battery pack.It is simultaneously former Avris (Q1, Q2, Q3, Q4), can with opened after (Q5, Q6, Q7, Q8) first close by way of realize synchronous rectification.Battery side pair Side (Q9, Q10, Q11, Q12) need to increase PWM pulsewidth modulations and turn off in advance with (Q1, Q2, Q3, Q4) while open-minded.Specific control Hair ripple is shown in Fig. 7.
It is above-mentioned to send out ripple principle for elementary cycle of the present utility model control, vehicle-mounted OBC and car can be realized by above-mentioned control Carry DC/DC converters electrically to integrate, while realize two-way vehicle-mounted OBC functions, by power battery pack energy feedback grid.Especially It is battery side synchronous rectification+PWM pulsewidth modulation strategies, DC/DC functional module efficiency will be improved to a greater extent.
Above-mentioned embodiment be only it is exemplary the utility model is shown, be not intended to limit the utility model.It is right in addition Belong to technology contents well known to those skilled in the art in be not described in the step of.Conceive for covering in the utility model Interior corresponding conversion and change are in the scope of the utility model.

Claims (13)

1. a kind of Vehicular charger main circuit of integrated DC/DC converters, civil power integrate the vehicle-mounted of DC/DC converters by this and filled Motor main circuit carries out Two-way energy transfer with power battery pack, it is characterised in that the vehicle-mounted charge of the integrated DC/DC converters Owner's circuit includes OBC/DCDC main transformers and DC/DC outlet side rectification circuits, OBC/DCDC main transformers pass energy DC/DC outlet side rectification circuits are passed, DC/DC outlet side rectification circuits transfer energy to automobile storage battery and load, the collection Vehicular charger main circuit into DC/DC converters gives storage battery power supply shape including charging electric vehicle state, power battery pack Three kinds of working conditions of state and automobile power cell group energy-feedback power grid.
2. the Vehicular charger main circuit of integrated DC/DC converters according to claim 1, it is characterised in that OBC/ DCDC main transformers include primary side winding, the first vice-side winding and the second vice-side winding, and primary side winding is civil power input side, and first Vice-side winding output connection automobile power cell group, the second vice-side winding output connection Vehicular accumulator cell;DC/DC outlet side rectifications Circuit includes transistor Q9, Q10 and Q11, the Q12 of common source configuration, and transistor Q9, Q10, Q11 and Q12 form full-wave rectification, Connected with the second vice-side winding, it is in parallel with output Vehicular accumulator cell side electrochemical capacitor Cout, there is provided Vehicular accumulator cell output voltage Vbat_Pb;Transistor Q1, Q2, Q3, Q4 form CLLC input sides and switch, primary side winding in parallel with the big electrochemical capacitor C_bus of bus With electromagnetic relay RLY1, input side resonant inductance Lr1, input side resonant capacitance Cr1 series connection, jump to transistor Q1, Q2, On the input side switch that Q3, Q4 are formed;Transistor Q5, Q6, Q7, Q8 form CLLC output power battery packs side full-bridge rectification electricity Road, it is in parallel with power battery pack side electrochemical capacitor Co_bat, export Vbat_Li and charged to power battery pack, the first vice-side winding, Export power battery pack side resonant inductance Lr2, output power battery pack side resonant capacitance Cr2 series connection, and jump to transistor Q5, Q6, Q7, Q8 are formed in the full bridge rectifier of CLLC output power battery packs side.
3. the Vehicular charger main circuit of integrated DC/DC converters according to claim 2, it is characterised in that transistor Q1 to Q12 is N-type MOSFET.
4. the Vehicular charger main circuit of integrated DC/DC converters according to claim 2, it is characterised in that when electronic When automobile is in charged state, relay RLY1 closures, inputs prime rectification circuit and pfc circuit and turn 220Vac alternating voltages Become stable Vbus DC voltages, the primary side winding of main transformer is energy input side, the first vice-side winding and the second secondary Winding is outlet side, and Q1, Q2, Q3, Q4 are that full-bridge CLLC is controlled to secondary biography energy;Q5, Q6, Q7, Q8 are output synchronous rectification control System, export Vbat_Li and charged to power battery pack;Q9 and Q10, Q11 and Q12 are controlled by synchronous rectification and PWM regulations Output voltage Vbat_Pb, charged to Vehicular accumulator cell, it is achieved thereby that vehicle-mounted OBC functions.
5. the Vehicular charger main circuit of integrated DC/DC converters according to claim 2, it is characterised in that work as power When battery pack is to storage battery power supply, relay RLY1 disconnects, and primary side winding is in open-circuit condition, and the first vice-side winding is that energy is defeated Enter side, the second vice-side winding is outlet side, closes Q1, Q2, Q3, Q4 driving, is in primary side and is fully disconnected state;Now Q5, Q6, Q7, Q8 are the switching tube of input full-bridge LLC controls, and automobile power cell group is in discharge condition;Q9 and Q10, Q11 and Q12 By the voltage Vbat_Pb that synchronous rectification output is stable, charged to Vehicular accumulator cell, so as to realize vehicle-mounted DC/DC converters Function.
6. the Vehicular charger main circuit of integrated DC/DC converters according to claim 2, it is characterised in that work as automobile During power battery pack energy feedback grid, relay RLY1 closures, primary side winding is energy-feedback power grid outlet side, the first secondary Winding is power battery pack energy input side, and the second vice-side winding is Vehicular accumulator cell charging outlet side, and Q5, Q6, Q7, Q8 are defeated Enter the switching tube of full-bridge CLLC controls, power battery pack is in discharge condition, by energy-feedback power grid;Q1, Q2, Q3, Q4 are complete Bridge synchronous rectification controls, output control output busbar voltage Vbus.
7. the Vehicular charger main circuit of integrated DC/DC converters according to claim 6, it is characterised in that transistor Q9 and Q10, Q11 and Q12 can be at off-state.
8. the Vehicular charger main circuit of integrated DC/DC converters according to claim 6, it is characterised in that can pass through All-wave synchronous rectification and PWM adjustment controls output burning voltage Vbat_Pb, charge to Vehicular accumulator cell.
A kind of 9. Vehicular charger main circuit for being used to control the integrated DC/DC converters any one of claim 1-8 Control loop, including main control MCU, isolation circuit, drive circuit, sample circuit, relay and transistor Q1-Q12 are adopted Controlled with PWM pulse-width adjustments are superimposed on CLLC double-direction controls and battery side synchronous rectification control, realize and integrated DC/DC is turned The double loop control of the Vehicular charger main circuit of parallel operation.
10. control loop according to claim 9, it is characterised in that sample circuit includes primary side sampling, power battery pack Side major loop sampling, the sampling of battery side ring road.
11. control loop according to claim 9, it is characterised in that when electric automobile is in charged state, electromagnetism after Electrical equipment RLY1 is closed, and main control MCU carries out PFM frequencies by sampling Vbat_Li magnitudes of voltage and power battery pack side output current value Rate regulative mode controlling transistor Q1, Q2, Q3, Q4, realize that CLLC controls pass energy;Power battery pack side secondary transistor simultaneously Q5, Q6, Q7, Q8, can with opened after transistor Q1, Q2, Q3, Q4 first close by way of realize synchronous rectification;Battery side secondary Transistor Q9, Q10, Q11, Q12 and Q5, Q6, Q7, Q8 are simultaneously open-minded, but increase PWM pulsewidth modulations and turn off in advance.
12. control loop according to claim 9, it is characterised in that when power battery pack is to storage battery power supply state, Electromagnetic relay RLY1 disconnects, and main control MCU carries out PFM by sampling Vbat_Pb magnitudes of voltage and battery side output current value Frequency regulative mode controlling transistor Q5, Q6, Q7, Q8, realize that LLC controls pass energy;Now civil power input side primary side transistor Q1, Q2, Q3, Q4 close driving;Battery side secondary transistor Q9, Q10, Q11, Q12 realizes synchronous rectification by first opening to close afterwards, when Gain can realize voltage stabilizing when too high by PWM pulsewidth modulations.
13. control loop according to claim 9, it is characterised in that when automobile power cell group energy-feedback power grid, Electromagnetic relay RLY1 is closed, and main control MCU carries out PFM frequency tune by sampling Vbus magnitudes of voltage and primary side output current value Section mode controlling transistor Q5, Q6, Q7, Q8, realize that CLLC controls pass energy, the energy back electric discharge of power battery pack;It is simultaneously former Avris transistor Q1, Q2, Q3, Q4, can with opened after Q5, Q6, Q7, Q8 first close by way of realize synchronous rectification;Battery side Secondary transistor Q9, Q10, Q11, Q12 and Q1, Q2, Q3, Q4 are simultaneously open-minded, need to separately increase PWM pulsewidth modulations and turn off in advance.
CN201720831970.5U 2017-07-11 2017-07-11 A kind of the Vehicular charger main circuit and its control loop of integrated DC/DC converters Active CN207156960U (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108521164A (en) * 2018-04-08 2018-09-11 嘉善中正新能源科技有限公司 A kind of consolidation circuit of the DC/DC converters and Vehicular charger of functionization
CN108631599A (en) * 2018-05-18 2018-10-09 邵子腾 A kind of message blind controller system
CN109995253A (en) * 2019-04-26 2019-07-09 深圳市首航通信股份有限公司 A kind of power circuit and new-energy automobile
CN111251916A (en) * 2019-09-23 2020-06-09 华为技术有限公司 Charging circuit with double output ports
WO2021003649A1 (en) * 2019-07-08 2021-01-14 深圳欣锐科技股份有限公司 Voltage conversion circuit of integrated vehicle-mounted charger
WO2021003648A1 (en) * 2019-07-08 2021-01-14 深圳欣锐科技股份有限公司 Voltage conversion circuit of integrated vehicle-mounted charger
WO2021003650A1 (en) * 2019-07-08 2021-01-14 深圳欣锐科技股份有限公司 Voltage conversion circuit for integrated vehicle-mounted charger

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108521164A (en) * 2018-04-08 2018-09-11 嘉善中正新能源科技有限公司 A kind of consolidation circuit of the DC/DC converters and Vehicular charger of functionization
CN108631599A (en) * 2018-05-18 2018-10-09 邵子腾 A kind of message blind controller system
CN109995253A (en) * 2019-04-26 2019-07-09 深圳市首航通信股份有限公司 A kind of power circuit and new-energy automobile
WO2021003649A1 (en) * 2019-07-08 2021-01-14 深圳欣锐科技股份有限公司 Voltage conversion circuit of integrated vehicle-mounted charger
WO2021003648A1 (en) * 2019-07-08 2021-01-14 深圳欣锐科技股份有限公司 Voltage conversion circuit of integrated vehicle-mounted charger
WO2021003650A1 (en) * 2019-07-08 2021-01-14 深圳欣锐科技股份有限公司 Voltage conversion circuit for integrated vehicle-mounted charger
CN111251916A (en) * 2019-09-23 2020-06-09 华为技术有限公司 Charging circuit with double output ports

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