CN203645381U - Vehicle charger system of electric vehicle - Google Patents
Vehicle charger system of electric vehicle Download PDFInfo
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- CN203645381U CN203645381U CN201320822105.6U CN201320822105U CN203645381U CN 203645381 U CN203645381 U CN 203645381U CN 201320822105 U CN201320822105 U CN 201320822105U CN 203645381 U CN203645381 U CN 203645381U
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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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Abstract
The utility model provides a vehicle charger system of an electric vehicle. The vehicle charger system comprises a full wave rectification circuit, a DC-DC converting circuit, a DC-DC circuit drive, a DC-DC circuit controller, a staggered PFC circuit, a PFC drive and a PFC controller, an output terminal of the full wave rectification circuit is connected with an input terminal of the staggered PFC circuit, an output terminal of the staggered PFC circuit is connected with an input terminal of the DC-DC converting circuit, the PFC controller controls the staggered PFC circuit via the control of the PFC drive, and the DC-DC controller controls the DC-DC converting circuit via the control of the DC-DC circuit drive. By adopting the technical solution, the processing of EMI is easy, the output ripple current and ripple voltage are low, the resistance of a filtering capacitor is reduced, the size is miniaturized, the heat loss is lower, the systematic efficiency is high, the type selection of devices is easier, the requirement of vehicle regulations is satisfied, and the reliability of the product is improved.
Description
Technical field
The utility model belongs to electric automobile field of power electronics, is specifically related to a kind of electric automobile battery charger system.
Background technology
Along with the universal new-energy automobile of country, the charger of electric automobile becomes important key components and parts, can substitute charging pile and complete charging and the energy storage to electric automobile high-voltage battery.
Because mains-supplied is sine voltage, wherein only have fundametal compoment to produce active power, harmonic current meeting consume reactive power, and cause line current effective value to increase, therefore introducing Active PFC (PFC, Power Factor Correction) circuit is necessary increasing charging system efficiency and reducing humorous wave interference.
The power of Vehicular charger generally in the scope of 3 ~ 15kW, the finally new challenge of the application surface of powerful power electronic product on automobile, if dealt with improperly, vehicle-mounted charge chance is brought humorous wave interference to electrical network, affects other power consumption equipments; In addition,, because automobile need to use under severe service condition or severe test condition, make the heat dissipation design of Vehicular charger become another difficult point.
The patent No. is the Chinese patent literature of CN201220517004.3, adopts the mode designing high-power onboard charger of reverse exciting switching voltage regulator parallel connection, has efficiency problem on the low side, cannot meet the primary demand of saving the energy; In addition, importation does not add circuit of power factor correction, must cause the harmonic pollution of electrical network.
The patent No. is the Chinese patent literature of CN201210405021.2, adopt the design of non-bridge PFC, make to realize synchronous conducting by power device, flow through power device current effective value and equal load current effective value, increase the power consumption of device, and on more powerful Vehicular charger, the loss of heat brings great difficulty to thermal design, the type selecting of device and design also become obstruction; Also there is following problem in non-bridge PFC: output voltage ripple is very large, and high-frequency noise needs loaded down with trivial details electromagnetic interface filter.
Utility model content
For solving the vehicle-mounted charger system of existing electric automobile insurmountable problem, design that a volume is little, efficiency is high, the high power vehicular charger of dispel the heat reasonable, safe and reliable and no-harmonic wave pollution, promote engineering development and the application of Vehicular charger.
The technical solution adopted in the utility model is, the vehicle-mounted charger system of a kind of electric automobile, comprise full-wave rectifying circuit, DC-DC translation circuit, DC-DC circuit driver and DC-DC circuit controller, it is characterized in that: also comprise interleaved PFC circuit, PFC driver and pfc controller, the output of full-wave rectifying circuit is connected with the input of interleaved PFC circuit, and the output of interleaved PFC circuit is connected with the input of DC-DC translation circuit; Pfc controller is by controlling PFC driver control interleaved PFC circuit, and DC-DC circuit controller is by controlling DC-DC circuit driver control DC-DC translation circuit.
Further, interleaved PFC circuit comprises inductance L 21, inductance L 22, Ultrafast recovery diode D21, Ultrafast recovery diode D22, N channel field-effect pipe Q21, N channel field-effect pipe Q22 and capacitor C 21, interleaved PFC circuit input end positive pole connects respectively one end of inductance L 21 and one end of inductance L 22, the other end of inductance L 21 connects respectively Ultrafast recovery diode D21 positive pole and N channel field-effect pipe Q21 drain electrode, the other end of inductance L 22 connects respectively Ultrafast recovery diode D22 positive pole and N channel field-effect pipe Q22 drain electrode, the convergence point of Ultrafast recovery diode D21 negative pole and Ultrafast recovery diode D22 negative pole connects respectively the positive pole of interleaved PFC circuit output end and one end of capacitor C 21, the negative pole of interleaved PFC circuit input end connects respectively N channel field-effect pipe Q21 source class, N channel field-effect pipe Q22 source class, the negative pole of the other end of capacitor C 21 and interleaved PFC circuit output end, N channel field-effect pipe Q21 grid and N channel field-effect pipe Q22 grid connect respectively the output of PFC driver.
Further, the vehicle-mounted charger system of described electric automobile also comprises PFC input voltage detector, PFC output voltage detector, the first source class current detector and the second source class current detector, PFC input voltage detector detects the input voltage of interleaved PFC circuit and testing result is sent to pfc controller, PFC output voltage detector detects the output voltage of interleaved PFC circuit and testing result is sent to pfc controller, the first source class current detector sends to pfc controller by testing result after detecting N channel field-effect pipe Q21 source class electric current, the second source class current detector sends to pfc controller by testing result after detecting N channel field-effect pipe Q22 source class electric current.
Further, between full-wave rectifying circuit output head anode and interleaved PFC circuit input end positive pole, be connected to pre-charge resistance R11, resistance R 11 two ends are also connected to relay.
Further, DC-DC translation circuit comprises full-bridge direct current DC converting circuit, high frequency transformer T31 and output rectification circuit, the output of the input termination interleaved PFC circuit of full-bridge direct current DC converting circuit, the former limit of the output termination high frequency transformer T31 of full-bridge direct current DC converting circuit, the output of the control termination DC-DC current driver of full-bridge direct current direct current switching current, the secondary of high frequency transformer T31 connects the input of output rectification circuit, the output of the vehicle-mounted charger system of electric automobile described in the output termination of output rectification circuit.
Further, full-bridge direct current DC converting circuit is mainly made up of N channel field-effect pipe Q31, N channel field-effect pipe Q32, N channel field-effect pipe Q33, N channel field-effect pipe Q34, and the grid of N channel field-effect pipe Q31, N channel field-effect pipe Q32, N channel field-effect pipe Q33 and N channel field-effect pipe Q34 connects respectively the output of DC-DC circuit driver; Output rectification circuit is mainly made up of Ultrafast recovery diode D31, Ultrafast recovery diode D32, Ultrafast recovery diode D33 and Ultrafast recovery diode D34; The output of the output of output rectification circuit and the vehicle-mounted charger system of described electric automobile is directly connected to filter inductance L32 and filter capacitor C31.
Further, the vehicle-mounted charger system of described electric automobile also comprises high side voltage detector, high voltage side current detector, optical coupling isolation device OPT1 and optical coupling isolation device OPT2, described DC-DC circuit controller is DSP, high side voltage detector detects the output voltage of output rectification circuit and testing result is sent to DSP through optical coupling isolation device OPT1, and high voltage side current detector detects the output current of output rectification circuit and testing result is sent to DSP through optical coupling isolation device OPT2.
Progress a bit again, the vehicle-mounted charger system of described electric automobile also comprises system temperature monitor, input ac voltage detector and input current detector, the interior temperature of system temperature monitor detection system also sends to respectively pfc controller and DC-DC circuit controller by testing result, input AC detector detects the voltage of the vehicle-mounted charger system input of electric automobile and testing result is sent to respectively to pfc controller and DC-DC circuit controller, input current detector detects the input current of interleaved PFC circuit and testing result is sent to respectively to pfc controller and DC-DC circuit controller.
Also further, DSP can enable to control to pfc controller.
Further, the vehicle-mounted charger system of described electric automobile also comprises CAN transceiver, DC-DC circuit controller and CAN transceiver communications.
The utlity model has following beneficial effect: adopt the technical solution of the utility model, EMI(Electromagnetic Interference, electromagnetic interference) be easy to process; Output ripple electric current and ripple voltage are less; Filter capacitor capacitance reduces, volume miniaturization; Thermal losses is lower, and system effectiveness is higher; Parts selection is easier; Meet the requirement of car rule, product reliability increases.
Accompanying drawing explanation
Fig. 1 is the vehicle-mounted charger system electrical block diagram of the utility model embodiment electric automobile.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
As shown in Fig. 1, the vehicle-mounted charger system of electric automobile of the utility model embodiment, comprise full-wave rectifying circuit 1, interleaved PFC circuit 21, PFC driver 22, pfc controller 23, DC-DC translation circuit 31, DC-DC circuit driver 32 and DC-DC circuit controller 33, the output of full-wave rectifying circuit 1 is connected with the input of interleaved PFC circuit 21, and the output of interleaved PFC circuit 21 is connected with the input of DC-DC translation circuit 31; Pfc controller 23 is controlled interleaved PFC circuit 21 by controlling PFC driver 22, and DC-DC circuit controller 33 is controlled DC-DC translation circuit 31 by controlling DC-DC circuit driver 32.
Between full-wave rectifying circuit 1 output head anode and interleaved PFC circuit 2 input anode, be connected to pre-charge resistance R1, resistance R 1 two ends are also connected to relay K.Civil power is input as 220V and exchanges; alternating current is realized full-wave rectification by the rectifier bridge of full-wave rectifying circuit 1, and pre-charge resistance R11 provides immediate current protection in the time powering on rear level system, and after powering on, relay K is resistance R 11 short circuits; directly give system power supply, reduce the wastage.
The vehicle-mounted charger system of electric automobile also comprises system temperature monitor, input ac voltage detector and input current detector (not shown), the interior temperature of system temperature monitor detection system also sends to respectively pfc controller 23 and DC-DC circuit controller 33 by testing result, input AC detector detects the voltage of the vehicle-mounted charger system input of electric automobile and testing result is sent to respectively to pfc controller 23 and DC-DC circuit controller 33, input current detector detects the input current of interleaved PFC circuit 21 and testing result is sent to respectively to pfc controller 23 and DC-DC circuit controller 33.
The vehicle-mounted charger system of electric automobile also comprises PFC input voltage detector, PFC output voltage detector, the first source class current detector and the second source class current detector (not shown), PFC input voltage detector detects the input voltage of interleaved PFC circuit 21 and testing result is sent to pfc controller 23, PFC output voltage detector detects the output voltage of interleaved PFC circuit 21 and testing result is sent to pfc controller 23, the first source class current detector sends to pfc controller 23 by testing result after detecting N channel field-effect pipe Q21 source class electric current, the second source class current detector sends to pfc controller 23 by testing result after detecting N channel field-effect pipe Q22 source class electric current.Wherein, the first source class current detector and the second source class current detector are current transformer.
In the present embodiment, employing be two-way interleaved PFC, can effectively reduce pfc circuit output ripple.L21, L22 form Boost booster circuit with Q21, Q22 respectively.The course of work is as follows: field effect transistor Q21 opens, inductance L 21 stored energys; Field effect transistor Q21 closes rear inductance L 21 and charges and powering load to capacitor C 21 by diode D21 afterflow; And then open field effect transistor Q22, and inductance L 22 starts stored energy, and field effect transistor Q22 closes rear inductance L 22 and charges and powering load to capacitor C 21 by diode D22 afterflow.Control the sequential of field effect transistor Q21, Q22 switch, can make to form 180 ° of phase differences by the alternating current in L21, L22 loop, after ripple current stack, synthetic quantity reduces, and can obtain the direct voltage of low ripple output.Utilize the internal loop control of pfc controller can realize output current to follow the variation of input voltage, realize Active PFC.Pfc controller is realized and being controlled by PFC master control IC, and control loop comprises input voltage, two-way input current and output voltage.The first source class current detector and the second source class current detector are realized respectively the detection to PFC single channel electric current, source class current detecting 1 is the detection signal of the first source class current detector, source class current detecting 2 is detection signals of the second source class current detector, detect electric current and make Current Transformer, the electric current gathering participates in current loop control, PFC voltage detecting realizes voltage loop control, can guarantee system stability real-time response.
DC-DC translation circuit 3 comprises full-bridge direct current DC converting circuit, high frequency transformer T31 and output rectification circuit, the output of the input termination interleaved PFC circuit 21 of full-bridge direct current DC converting circuit, the former limit of the output termination high frequency transformer T31 of full-bridge direct current DC converting circuit, the output of the control termination DC-DC current driver of full-bridge direct current direct current switching current, the secondary of high frequency transformer T31 connects the input of output rectification circuit, the output of the vehicle-mounted charger system of electric automobile described in the output termination of output rectification circuit.
Full-bridge direct current DC converting circuit is mainly made up of N channel field-effect pipe Q31, N channel field-effect pipe Q32, N channel field-effect pipe Q33, N channel field-effect pipe Q34, and the grid of N channel field-effect pipe Q31, N channel field-effect pipe Q32, N channel field-effect pipe Q33 and N channel field-effect pipe Q34 connects respectively the output of DC-DC circuit driver; Output rectification circuit is mainly made up of Ultrafast recovery diode D31, Ultrafast recovery diode D32, Ultrafast recovery diode D33 and Ultrafast recovery diode D34; The output of the output of output rectification circuit and the vehicle-mounted charger system of described electric automobile is directly connected to filter inductance L32 and filter capacitor C31.
The vehicle-mounted charger system of electric automobile also comprises high side voltage detector, high voltage side current detector, optical coupling isolation device OPT1 and optical coupling isolation device OPT2, described DC-DC circuit controller is DSP, high side voltage detector detects the output voltage of output rectification circuit and testing result is sent to DSP through optical coupling isolation device OPT1, and high voltage side current detector detects the output current of output rectification circuit and testing result is sent to DSP through optical coupling isolation device OPT2.High direct voltage side voltage and current detects and realizes linear isolation by light-coupled isolation chip, and the signal after isolation is delivered to DSP and gathered and detect; DSP can enable to control to pfc controller.
The course of work is as follows: field effect transistor Q31, Q34 first open, and the former limit of transformer T31 forms forward voltage; After Q31, Q34 close, open Q32, Q33, the former limit of transformer T31 forms negative voltage again.Inductance L 31, in the time of the commutation of the former limit of transformer T31, provides resonance and the required energy of soft switch.Ultrafast recovery diode D31 ~ D34 realizes the rectification of output voltage, finally obtains the direct voltage that ripple is less, is connected to high-tension battery and meets the demand that high-tension battery charges after filter inductance L32 and filter capacitor C31 filtering.DC-DC control loop comprises output voltage and output current, and system detects output voltage and electric current in real time, realizes the control of Voltage loop and electric current loop.In addition, monitoring module is realized the measuring ability of current/voltage temperature, and gathers related data by DSP, and monitoring module cuts off in time pfc controller output in the time that appearance is abnormal, realizes self-protection system function.
The vehicle-mounted charger system of electric automobile also comprises CAN transceiver 4, and DC-DC circuit controller 33 is communicated by letter with CAN transceiver 4.Vehicular charger communication mainly realizes by CAN transceiver, and CAN transceiver can receive car load CAN signal, is converted to the signal that DSP can identify, and same DSP also can send a signal to CAN transceiver, after send on the CAN network of car load.
The vehicle-mounted charger system of electric automobile of the utility model embodiment is the combination of full-wave rectification, interleaved PFC and full-bridge DC-DC.Adopt rectification module to carry out rectification to the alternating current of input, the all-wave after rectification is realized Active PFC and is boosted by interleaved PFC, utilizes phase-shifting full-bridge to realize DC-to-DC conversion, finally obtains high direct voltage and exports to high-tension battery charging.Wherein interleaving PFC utilizes automotive grade PFC chip to realize control; phase-shifting full-bridge utilizes automotive grade digital processing chip DSP to realize digital control; isolation processing is carried out in the sampling of high-low pressure voltage and current; guarantee system safety and the requirement that meets GB; in addition; system provides various excess temperature overvoltages and overcurrent protection function, utilizes CAN to realize the communication of Vehicular charger and car load.
Be in conjunction with concrete preferred implementation further detailed description of the utility model as said above, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, not departing under the prerequisite of the utility model design and intension, can also make some simple deduction or replace, all should be considered as belonging to protection range of the present utility model.
Claims (10)
1. the vehicle-mounted charger system of electric automobile, comprise full-wave rectifying circuit (1), DC-DC translation circuit (31), DC-DC circuit driver (32) and DC-DC circuit controller (33), it is characterized in that: also comprise interleaved PFC circuit (21), PFC driver (22) and pfc controller (23), the output of full-wave rectifying circuit (1) is connected with the input of interleaved PFC circuit (21), and the output of interleaved PFC circuit (21) is connected with the input of DC-DC translation circuit (31); Pfc controller (23) is controlled interleaved PFC circuit (21) by controlling PFC driver (22), and DC-DC circuit controller (33) is controlled DC-DC translation circuit (31) by controlling DC-DC circuit driver (32).
2. the vehicle-mounted charger system of electric automobile according to claim 1, it is characterized in that: interleaved PFC circuit (21) comprises inductance L 21, inductance L 22, Ultrafast recovery diode D21, Ultrafast recovery diode D22, N channel field-effect pipe Q21, N channel field-effect pipe Q22 and capacitor C 21, interleaved PFC circuit (21) input anode connects respectively one end of inductance L 21 and one end of inductance L 22, the other end of inductance L 21 connects respectively Ultrafast recovery diode D21 positive pole and N channel field-effect pipe Q21 drain electrode, the other end of inductance L 22 connects respectively Ultrafast recovery diode D22 positive pole and N channel field-effect pipe Q22 drain electrode, the convergence point of Ultrafast recovery diode D21 negative pole and Ultrafast recovery diode D22 negative pole connects respectively the positive pole of interleaved PFC circuit (21) output and one end of capacitor C 21, the negative pole of interleaved PFC circuit (21) input connects respectively N channel field-effect pipe Q21 source class, N channel field-effect pipe Q22 source class, the negative pole of the other end of capacitor C 21 and interleaved PFC circuit (21) output, N channel field-effect pipe Q21 grid and N channel field-effect pipe Q22 grid connect respectively the output of PFC driver (22).
3. the vehicle-mounted charger system of electric automobile according to claim 2, it is characterized in that: also comprise PFC input voltage detector, PFC output voltage detector, the first source class current detector and the second source class current detector, PFC input voltage detector detects the input voltage of interleaved PFC circuit (21) and testing result is sent to pfc controller (23), PFC output voltage detector detects the output voltage of interleaved PFC circuit (21) and testing result is sent to pfc controller (23), the first source class current detector sends to pfc controller (23) by testing result after detecting N channel field-effect pipe Q21 source class electric current, the second source class current detector sends to pfc controller (23) by testing result after detecting N channel field-effect pipe Q22 source class electric current.
4. the vehicle-mounted charger system of electric automobile according to claim 1, it is characterized in that: between full-wave rectifying circuit (1) output head anode and interleaved PFC circuit (21) input anode, be connected to pre-charge resistance R11, resistance R 11 two ends are also connected to relay (K).
5. the vehicle-mounted charger system of electric automobile according to claim 1, it is characterized in that: DC-DC translation circuit (3) comprises full-bridge direct current DC converting circuit, high frequency transformer T31 and output rectification circuit, the output of the input termination interleaved PFC circuit (21) of full-bridge direct current DC converting circuit, the former limit of the output termination high frequency transformer T31 of full-bridge direct current DC converting circuit, the output of the control termination DC-DC current driver of full-bridge direct current direct current switching current, the secondary of high frequency transformer T31 connects the input of output rectification circuit, the output of the vehicle-mounted charger system of electric automobile described in the output termination of output rectification circuit.
6. the vehicle-mounted charger system of electric automobile according to claim 5, it is characterized in that: full-bridge direct current DC converting circuit is mainly made up of N channel field-effect pipe Q31, N channel field-effect pipe Q32, N channel field-effect pipe Q33, N channel field-effect pipe Q34, the grid of N channel field-effect pipe Q31, N channel field-effect pipe Q32, N channel field-effect pipe Q33 and N channel field-effect pipe Q34 connects respectively the output of DC-DC circuit driver; Output rectification circuit is mainly made up of Ultrafast recovery diode D31, Ultrafast recovery diode D32, Ultrafast recovery diode D33 and Ultrafast recovery diode D34; The output of the output of output rectification circuit and the vehicle-mounted charger system of described electric automobile is directly connected to filter inductance L32 and filter capacitor C31.
7. the vehicle-mounted charger system of electric automobile according to claim 5, it is characterized in that: also comprise high side voltage detector, high voltage side current detector, optical coupling isolation device OPT1 and optical coupling isolation device OPT2, described DC-DC circuit controller is DSP, high side voltage detector detects the output voltage of output rectification circuit and testing result is sent to DSP through optical coupling isolation device OPT1, and high voltage side current detector detects the output current of output rectification circuit and testing result is sent to DSP through optical coupling isolation device OPT2.
8. the vehicle-mounted charger system of electric automobile according to claim 7, it is characterized in that: also comprise system temperature monitor, input ac voltage detector and input current detector, the interior temperature of system temperature monitor detection system also sends to respectively pfc controller (23) and DC-DC circuit controller (33) by testing result, input AC detector detects the voltage of the vehicle-mounted charger system input of electric automobile and testing result is sent to respectively to pfc controller (23) and DC-DC circuit controller (33), input current detector detects the input current of interleaved PFC circuit (21) and testing result is sent to respectively to pfc controller (23) and DC-DC circuit controller (33).
9. the vehicle-mounted charger system of electric automobile according to claim 8, is characterized in that: DSP can enable to control to pfc controller.
10. the vehicle-mounted charger system of electric automobile according to claim 1, is characterized in that: also comprise CAN transceiver (4), DC-DC circuit controller (33) is communicated by letter with CAN transceiver (4).
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| CN201320822105.6U CN203645381U (en) | 2013-12-13 | 2013-12-13 | Vehicle charger system of electric vehicle |
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| CN104270001A (en) * | 2014-09-19 | 2015-01-07 | 国家电网公司 | Digital type direct-current test power source |
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| CN104901404A (en) * | 2015-05-25 | 2015-09-09 | 北京鼎汉技术股份有限公司 | Charging circuit and output control method |
| CN105071513A (en) * | 2015-08-06 | 2015-11-18 | 贵州兴国新动力科技有限公司 | Vehicle-mounted charging system of electromobile |
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- 2013-12-13 CN CN201320822105.6U patent/CN203645381U/en not_active Expired - Fee Related
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