CN216721201U - Vehicle-mounted power supply power circuit and vehicle-mounted power supply - Google Patents
Vehicle-mounted power supply power circuit and vehicle-mounted power supply Download PDFInfo
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- CN216721201U CN216721201U CN202220038915.1U CN202220038915U CN216721201U CN 216721201 U CN216721201 U CN 216721201U CN 202220038915 U CN202220038915 U CN 202220038915U CN 216721201 U CN216721201 U CN 216721201U
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Abstract
The utility model discloses a vehicle-mounted power supply power circuit and a vehicle-mounted power supply. The vehicle-mounted power supply power circuit comprises: the power factor correction PFC circuit comprises a filter circuit, a power factor correction PFC circuit, a voltage conversion circuit and a control circuit; the input end of the filter circuit is electrically connected with a power grid/load, and the output end of the filter circuit is electrically connected with the input end of the PFC circuit; the output end of the PFC circuit is electrically connected with the input end of the voltage conversion circuit; the output end of the voltage conversion circuit is respectively electrically connected with the vehicle high-voltage system and the vehicle low-voltage system; the control circuit is respectively and electrically connected with the control end of the PFC circuit and the control end of the voltage conversion circuit. According to the technical scheme, electronic devices in the vehicle-mounted power supply power circuit can be reduced, the occupied space and the construction cost of the circuit are reduced, two functions of single-phase alternating current charging and high-voltage pre-charging are compatible, and the performance of the vehicle-mounted power supply is improved.
Description
Technical Field
The embodiment of the utility model relates to the technical field of new energy automobiles, in particular to a vehicle-mounted power supply power circuit and a vehicle-mounted power supply.
Background
With the development of new energy vehicles, the performance requirements of people on new energy vehicles are gradually increased, wherein the performance of high-voltage components of new energy vehicles is more concerned.
At present, the pre-charging function of the high-voltage component is usually realized by adopting a pre-charging relay and a pre-charging resistor to form a pre-charging loop. The design of the vehicle-mounted charger and a Direct Current/Direct Current converter (DC/DC) comprises independent design, integrated design and deep integrated design, the vehicle-mounted charger and the DC/DC are not provided with any shared part during independent design, the arrangement of the whole vehicle is complex, independent support, cooling and high-low voltage connection are required, and the cost is high; when the vehicle-mounted charger and the DC/DC are integrally designed, the vehicle-mounted charger and the DC/DC often only share the shell and the cooling water channel, power devices and control are independently designed, the power devices and the control belong to a high-voltage component in appearance, the whole vehicle is easy to arrange, a bracket, cooling and high-low voltage connection are saved, and the vehicle-mounted charger and the DC/DC are still two high-voltage components in principle; the vehicle-mounted charger and the DC/DC deep integration design share power devices of a secondary side high-voltage direct current output end of a transformer of the vehicle-mounted charger and a primary side high-voltage direct current input end of a DC/DC transformer, so that the number of components is reduced, the cost of a single piece is reduced, the vehicle-mounted charger only supports single-phase alternating current charging, and the DC/DC does not have a high-voltage pre-charging function.
Disclosure of Invention
The utility model provides a vehicle-mounted power supply power circuit and a vehicle-mounted power supply, and aims to realize the compatibility of single-phase alternating current charging and high-voltage pre-charging in the vehicle-mounted power supply power circuit.
In a first aspect, an embodiment of the present invention provides a vehicle power supply power circuit, where the vehicle power supply power circuit includes:
the power factor correction PFC circuit comprises a filter circuit, a power factor correction PFC circuit, a voltage conversion circuit and a control circuit;
the input end of the filter circuit is electrically connected with a power grid/load, and the output end of the filter circuit is electrically connected with the input end of the PFC circuit;
the output end of the PFC circuit is electrically connected with the input end of the voltage conversion circuit;
the output end of the voltage conversion circuit is respectively electrically connected with the vehicle high-voltage system and the vehicle low-voltage system;
the control circuit is respectively and electrically connected with the control end of the PFC circuit and the control end of the voltage conversion circuit.
Optionally, the voltage conversion circuit includes: the inverter circuit, the transformer, the low-voltage conversion circuit and the high-voltage conversion circuit;
the input end of the inverter circuit is electrically connected with the output end of the PFC circuit, and the output end of the inverter circuit is electrically connected with the primary side of the transformer;
the secondary side of the transformer comprises a first winding and a second winding; the first winding is electrically connected with the input end of the high-voltage conversion circuit, and the output end of the high-voltage conversion circuit is electrically connected with a vehicle high-voltage system; the second winding is electrically connected with the input end of the low-voltage conversion circuit, and the output end of the low-voltage conversion circuit is electrically connected with a vehicle low-voltage system.
Optionally, the high voltage conversion circuit includes: a first rectifying circuit; the low-voltage conversion circuit includes: a second rectifying circuit and a voltage stabilizing circuit;
the second winding is electrically connected with the input end of the second rectifying circuit, the output end of the second rectifying circuit is electrically connected with the input end of the voltage stabilizing circuit, and the output end of the voltage stabilizing circuit is electrically connected with the vehicle low-voltage system.
Optionally, the PFC circuit includes: the first inductor, the second inductor, the third inductor, the first switching tube, the second switching tube, the third switching tube, the fourth switching tube, the fifth switching tube and the sixth switching tube;
one end of the first inductor is electrically connected with the first output end of the filter circuit, the other end of the first inductor is electrically connected with the second end of the first switch tube and the third end of the second switch tube, the third end of the first switch tube is electrically connected with the first input end of the inverter circuit, and the second end of the second switch tube is electrically connected with the second input end of the inverter circuit;
one end of the second inductor is electrically connected with the second output end of the filter circuit, the other end of the second inductor is electrically connected with the second end of the third switch tube and the third end of the fourth switch tube, the third end of the third switch tube is electrically connected with the first input end of the inverter circuit, and the second end of the fourth switch tube is electrically connected with the second input end of the inverter circuit;
one end of a third inductor is electrically connected with the third output end of the filter circuit, the other end of the third inductor is electrically connected with the second end of a fifth switching tube and the third end of a sixth switching tube, the third end of the fifth switching tube is electrically connected with the first input end of the inverter circuit, and the second end of the sixth switching tube is electrically connected with the second input end of the inverter circuit;
the first ends of the first switch tube, the second switch tube, the third switch tube, the fourth switch tube, the fifth switch tube and the sixth switch tube are all connected with control signals.
Optionally, the inverter circuit includes: a seventh switching tube, an eighth switching tube, a ninth switching tube and a tenth switching tube;
the first ends of the seventh switching tube, the eighth switching tube, the ninth switching tube and the tenth switching tube are all connected with control signals;
the second end of the seventh switching tube and the third end of the eighth switching tube are electrically connected with one end of the primary side of the transformer, and the second end of the ninth switching tube and the third end of the tenth switching tube are electrically connected with the other end of the primary side of the transformer;
the third ends of the seventh switching tube and the ninth switching tube are electrically connected with the third ends of the first switching tube, the third switching tube and the fifth switching tube; the second ends of the eighth switching tube and the tenth switching tube are electrically connected with the second ends of the second switching tube, the fourth switching tube and the sixth switching tube.
Optionally, the first rectification circuit includes: an eleventh switch tube, a twelfth switch tube, a thirteenth switch tube, a fourteenth switch tube and a first capacitor;
the first ends of the eleventh switching tube, the twelfth switching tube, the thirteenth switching tube and the fourteenth switching tube are all connected with control signals;
the second end of the eleventh switch tube and the third end of the twelfth switch tube are electrically connected with one end of the first winding; the second end of the thirteenth switching tube and the third end of the fourteenth switching tube are electrically connected with the other end of the first winding;
the third ends of the eleventh switch tube and the thirteenth switch tube are electrically connected with one end of the first capacitor, and the second ends of the twelfth switch tube and the fourteenth switch tube are electrically connected with the other end of the first capacitor; the first capacitor is connected in parallel with the vehicle high-voltage system.
Optionally, the second rectifying circuit includes: a fifteenth switching tube, a sixteenth switching tube and a second capacitor; the voltage stabilizing circuit includes: a seventeenth switching tube, an eighteenth switching tube, a third capacitor and a fourth inductor;
the first ends of the fifteenth switching tube and the sixteenth switching tube are both connected with control signals; the second end of the fifteenth switching tube is electrically connected with the first end of the second winding; the third end of the fifteenth switching tube is electrically connected with the second end of the sixteenth switching tube; the third end of the sixteenth switching tube is electrically connected with the third end of the second winding;
the second end of the second winding is electrically connected with one end of a second capacitor, and the other end of the second capacitor is electrically connected with the second end of the sixteenth switching tube; the first ends of the seventeenth switching tube and the eighteenth switching tube are connected with control signals;
a third end of the seventeenth switching tube is electrically connected with one end of the second capacitor, a second end of the seventeenth switching tube is electrically connected with a third end of the eighteenth switching tube, and a second end of the eighteenth switching tube is electrically connected with the other end of the second capacitor;
one end of the fourth inductor is electrically connected with the second end of the seventeenth switching tube, the other end of the fourth inductor is electrically connected with one end of the third capacitor, and the other end of the third capacitor is electrically connected with the other end of the second capacitor.
Optionally, the voltage conversion circuit further includes: a fourth capacitor, a fifth inductor and a sixth inductor;
the fifth inductor is arranged between one end of the primary side of the transformer and the second end of the seventh switching tube and the third end of the eighth switching tube; the fourth capacitor is arranged between the other end of the primary side of the transformer and the second end of the ninth switching tube and the third end of the tenth switching tube;
the sixth inductor is arranged between the other end of the first winding and the second end of the thirteenth switching tube and the third end of the fourteenth switching tube; and the fifth capacitor is arranged between one end of the first winding and the second end of the eleventh switch tube and the third end of the twelfth switch tube.
Optionally, the vehicle power supply circuit further includes: a communication circuit; the control circuit is in communication connection with the vehicle high-voltage system and the vehicle low-voltage system through the communication circuit.
In a second aspect, an embodiment of the present invention further provides a vehicle power supply, where the vehicle power supply includes: the power system comprises a power grid/load, a vehicle high-voltage system, a vehicle low-voltage system and the vehicle-mounted power supply power circuit in any one of the embodiments of the utility model.
The utility model provides a vehicle-mounted power supply power circuit, which comprises: the power factor correction PFC circuit comprises a filter circuit, a power factor correction PFC circuit, a voltage conversion circuit and a control circuit; the input end of the filter circuit is electrically connected with a power grid/load, and the output end of the filter circuit is electrically connected with the input end of the PFC circuit; the output end of the PFC circuit is electrically connected with the input end of the voltage conversion circuit; the output end of the voltage conversion circuit is respectively electrically connected with the vehicle high-voltage system and the vehicle low-voltage system; the control circuit is respectively and electrically connected with the control end of the PFC circuit and the control end of the voltage conversion circuit. According to the technical scheme, electronic devices in a vehicle power circuit can be reduced, the occupied space and the construction cost of the circuit are reduced, the two functions of single-phase alternating current charging and high-voltage pre-charging can be compatible, and the performance of the vehicle power supply is improved.
Drawings
Fig. 1 is a schematic structural diagram of a first vehicle-mounted power supply power circuit in an embodiment of the utility model;
FIG. 2 is a schematic diagram of a second vehicle power supply circuit according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a third vehicle power supply circuit according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a fourth vehicle power supply circuit according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a fifth vehicle-mounted power supply power circuit in the embodiment of the utility model;
FIG. 6 is a schematic diagram of a first operating mode of the onboard power supply circuit in an embodiment of the present invention;
FIG. 7 is a schematic diagram of a second operating mode of the onboard power supply circuit in an embodiment of the present invention;
FIG. 8 is a schematic diagram of a third operating mode of the onboard power supply circuit in an embodiment of the present invention;
FIG. 9 is a schematic diagram of a fourth operating mode of the onboard power supply circuit in an embodiment of the present invention;
fig. 10 is a schematic structural diagram of a fifth operation mode of the in-vehicle power supply power circuit in the embodiment of the utility model;
fig. 11 is a schematic structural diagram of a sixth operation mode of the vehicle-mounted power supply power circuit in the embodiment of the utility model.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting of the utility model. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 is a schematic structural diagram of a first vehicle-mounted power supply power circuit in an embodiment of the present invention, and as shown in fig. 1, the vehicle-mounted power supply power circuit includes: a filter circuit 10, a Power Factor Correction (PFC) circuit 20, a voltage conversion circuit 30, and a control circuit 40; wherein, the input end of the filter circuit 10 is electrically connected with the power grid/load 50, and the output end of the filter circuit 10 is electrically connected with the input end of the PFC circuit 20; the output end of the PFC circuit 20 is electrically connected with the input end of the voltage conversion circuit 30; the output end of the voltage conversion circuit 30 is electrically connected with the vehicle high-voltage system 60 and the vehicle low-voltage system 70 respectively; the control circuit 40 is electrically connected to the control terminal of the PFC circuit 20 and the control terminal of the voltage conversion circuit 30, respectively.
Wherein, the power grid/load 50 includes an external power grid, an alternating current load, etc.; the filter circuit 10 is composed of an X capacitor, a Y capacitor and a common mode inductor, and is configured to filter an interference signal, specifically, the interference signal includes an interference signal of an external power grid to a vehicle and an interference signal of the vehicle to the external power grid; the power factor correction PFC circuit 20 adopts a three-phase six-switch power topology, and the current and the voltage of alternating current are kept in the same phase through six switch tubes; the voltage conversion circuit 30 is a power topology circuit for realizing high-low voltage conversion, and the control circuit 40 can control the work of the power factor correction PFC circuit 20 and the voltage conversion circuit 30; vehicle high voltage system 60 includes a power battery that provides a high voltage dc voltage of 240V to 480V, and vehicle low voltage system 70 includes a lead acid battery that provides a low voltage dc voltage of 54V to 60V.
Optionally, fig. 2 is a schematic structural diagram of a second vehicle-mounted power supply power circuit in the embodiment of the present invention, and as can be seen from fig. 2, the voltage conversion circuit 30 includes: an inverter circuit 301, a transformer 302, a low voltage conversion circuit 304, and a high voltage conversion circuit 303.
Wherein, the input end of the inverter circuit 301 is electrically connected with the output end of the PFC circuit 20, and the output end of the inverter circuit 301 is electrically connected with the primary side of the transformer 302; the secondary side of the transformer 302 includes a first winding 3021 and a second winding 3022; the first winding 3021 is electrically connected to an input terminal of the high voltage conversion circuit 303, and an output terminal of the high voltage conversion circuit 303 is electrically connected to the vehicle high voltage system 60; the second winding 3022 is electrically connected to an input terminal of the low voltage converter circuit 304, and an output terminal of the low voltage converter circuit 304 is electrically connected to the vehicle low voltage system 70.
Specifically, the transformer 302 can perform isolated transmission on the high-voltage electrical signal, that is, the transformer 302 can transmit the ac power received by the primary side to the secondary side to implement voltage reduction, and the number of turns of the first winding and the second winding on the secondary side of the transformer 302 may be different or the same, so as to perform voltage reduction to different degrees on the high-voltage ac voltage on the primary side, thereby satisfying the power consumption requirements of different systems.
Optionally, fig. 3 is a schematic structural diagram of a third vehicle-mounted power supply power circuit in the embodiment of the utility model, and as can be seen from fig. 2, the high-voltage conversion circuit 303 includes a first rectification circuit 3031; the low voltage conversion circuit 304 includes a second rectification circuit 3041 and a voltage stabilizing circuit 3042.
The second winding 3032 is electrically connected to an input end of the second rectification circuit 3041, an output end of the second rectification circuit 3041 is electrically connected to an input end of the voltage stabilizing circuit 3042, and an output end of the voltage stabilizing circuit 3042 is electrically connected to the vehicle low voltage system 70.
Specifically, the first winding 3021 and the second winding 3022 are respectively connected to a rectifying circuit, so that the ac voltage from the windings can be rectified into a dc voltage; the second rectification circuit 3041 is further connected to a voltage stabilizing circuit 3042, which can stabilize the low-voltage dc voltage output by the second rectification circuit 3041 and provide it to the vehicle low-voltage system 70 electrically connected to it, so as to supply power to the vehicle low-voltage system 70.
The vehicle-mounted power supply power circuit provided by the embodiment comprises: the power factor correction PFC circuit comprises a filter circuit, a power factor correction PFC circuit, a voltage conversion circuit and a control circuit; the input end of the filter circuit is electrically connected with a power grid/load, and the output end of the filter circuit is electrically connected with the input end of the PFC circuit; the output end of the PFC circuit is electrically connected with the input end of the voltage conversion circuit; the output end of the voltage conversion circuit is respectively electrically connected with the vehicle high-voltage system and the vehicle low-voltage system; the control circuit is respectively and electrically connected with the control end of the PFC circuit and the control end of the voltage conversion circuit. According to the technical scheme, electronic devices in a vehicle-mounted power supply power circuit can be reduced, the occupied space and the construction cost of the circuit are reduced, the two functions of single-phase alternating current charging and high-voltage pre-charging are compatible, and the performance of the vehicle-mounted power supply is improved.
In a specific embodiment, a vehicle-mounted power supply power circuit is described in detail based on the above-mentioned embodiments, fig. 4 is a schematic structural diagram of a fourth vehicle-mounted power supply power circuit in the embodiment of the present invention, and as can be seen from fig. 4, the vehicle-mounted power supply power circuit is composed of a plurality of inductors, capacitors and switching tubes.
Optionally, the PFC circuit 20 includes: the inductor comprises a first inductor L1, a second inductor L2, a third inductor L3, a first switching tube Q1, a second switching tube Q2, a third switching tube Q3, a fourth switching tube Q4, a fifth switching tube Q5 and a sixth switching tube Q6.
Specifically, one end of a first inductor L1 is electrically connected to a first output end of the filter circuit 10, the other end of the first inductor L1 is electrically connected to a second end of a first switch tube Q1 and a third end of a second switch tube Q2, a third end of a first switch tube Q1 is electrically connected to a first input end of the inverter circuit 301, and a second end of a second switch tube Q2 is electrically connected to a second input end of the inverter circuit 301; one end of a second inductor L2 is electrically connected to the second output end of the filter circuit 10, the other end of the second inductor L2 is electrically connected to the second end of a third switching tube Q3 and the third end of a fourth switching tube Q4, the third end of the third switching tube Q3 is electrically connected to the first input end of the inverter circuit 301, and the second end of the fourth switching tube Q4 is electrically connected to the second input end of the inverter circuit 301; one end of the third inductor L3 is electrically connected to the third output terminal of the filter circuit 10, the other end of the third inductor L3 is electrically connected to the second terminal of the fifth switch tube Q5 and the third terminal of the sixth switch tube Q6, the third terminal of the fifth switch tube Q5 is electrically connected to the first input terminal of the inverter circuit 301, and the second terminal of the sixth switch tube Q6 is electrically connected to the second input terminal of the inverter circuit 302.
First ends of the first switch tube Q1, the second switch tube Q2, the third switch tube Q3, the fourth switch tube Q4, the fifth switch tube Q5 and the sixth switch tube Q6 are all connected with control signals.
Optionally, the inverter circuit 301 includes: a seventh switching tube Q7, an eighth switching tube Q8, a ninth switching tube Q9 and a tenth switching tube Q10.
The first ends of the seventh switch tube Q7, the eighth switch tube Q8, the ninth switch tube Q9 and the tenth switch tube Q10 are all connected with control signals.
Specifically, the second terminal of the seventh switching tube Q7 and the third terminal of the eighth switching tube Q8 are electrically connected to one end of the primary side of the transformer 302, and the second terminal of the ninth switching tube Q9 and the third terminal of the tenth switching tube Q10 are electrically connected to the other end of the primary side of the transformer 302; the third ends of the seventh switching tube Q7 and the ninth switching tube Q9 are electrically connected with the third ends of the first switching tube Q1, the third switching tube Q3 and the fifth switching tube Q5; the second ends of the eighth switching tube Q8 and the tenth switching tube Q10 are electrically connected to the second ends of the second switching tube Q2, the fourth switching tube Q4 and the sixth switching tube Q6.
Optionally, the first rectification circuit 3031 includes: an eleventh switching tube Q11, a twelfth switching tube Q12, a thirteenth switching tube Q13, a fourteenth switching tube Q14 and a first capacitor C1;
the first ends of the eleventh switching tube Q11, the twelfth switching tube Q12, the thirteenth switching tube Q13 and the fourteenth switching tube Q14 are all connected with control signals.
Specifically, the second end of the eleventh switch tube Q11 and the third end of the twelfth switch tube Q12 are electrically connected to one end of the first winding 3021; the second end of the thirteenth switching tube Q13 and the third end of the fourteenth switching tube Q14 are electrically connected with the other end of the first winding 3021; the third ends of the eleventh switch tube Q11 and the thirteenth switch tube Q13 are electrically connected with one end of the first capacitor C1, and the second ends of the twelfth switch tube Q12 and the fourteenth switch tube Q14 are electrically connected with the other end of the first capacitor C1; the first capacitor C1 is connected in parallel with the vehicle high voltage system 60.
Optionally, the second rectification circuit 3041 includes a fifteenth switching tube Q15, a sixteenth switching tube Q16 and a second capacitor C2; the voltage stabilizing circuit 3042 includes a seventeenth switching transistor Q17, an eighteenth switching transistor Q18, a third capacitor C3, and a fourth inductor L4.
The first ends of the fifteenth switching tube Q15, the sixteenth switching tube Q16, the seventeenth switching tube Q17 and the eighteenth switching tube Q18 are all connected with control signals.
Specifically, a second end of the fifteenth switching tube Q15 is electrically connected to the first end of the second winding 3022; the third end of the fifteenth switching tube Q15 is electrically connected with the second end of the sixteenth switching tube Q16; a third terminal of the sixteenth switching tube Q16 is electrically connected with a third terminal of the second winding 3022; a second end of the second winding 3022 is electrically connected to one end of a second capacitor C2, and the other end of the second capacitor C2 is electrically connected to a second end of a sixteenth switching tube Q16; a third end of the seventeenth switching tube Q17 is electrically connected with one end of the second capacitor C2, a second end of the seventeenth switching tube Q17 is electrically connected with a third end of the eighteenth switching tube Q18, and a second end of the eighteenth switching tube Q18 is electrically connected with the other end of the second capacitor C2; one end of the fourth inductor L4 is electrically connected to the second end of the seventeenth switching tube Q17, the other end of the fourth inductor L4 is electrically connected to one end of the third capacitor C3, and the other end of the third capacitor C3 is electrically connected to the other end of the second capacitor C2.
Optionally, the voltage converting circuit 30 further includes: a fourth capacitor C4, a fifth capacitor C5, a fifth inductor L5 and a sixth inductor L6.
Specifically, the fifth inductor L5 is disposed between one end of the primary side of the transformer 302 and the second terminal of the seventh switching tube Q7, and the third terminal of the eighth switching tube Q8; the fourth capacitor C4 is disposed between the other end of the primary side of the transformer 302 and the second terminal of the ninth switch Q9 and the third terminal of the tenth switch Q10; a sixth inductor L6 is disposed between the other end of the first winding 3021 and the second end of the thirteenth switching tube Q13 and the third end of the fourteenth switching tube Q14; a fifth capacitor C5 is disposed between one end of the first winding 3021 and the second end of the eleventh switch tube Q11 and the third end of the twelfth switch tube Q12.
Optionally, fig. 5 is a schematic structural diagram of a fifth vehicle-mounted power supply power circuit in the embodiment of the present invention, and as can be seen from fig. 5, the vehicle-mounted power supply power circuit further includes a communication circuit 80, the control circuit 40 is communicatively connected to the vehicle high-voltage system 60 and the vehicle low-voltage system 70 through the communication circuit 80, that is, the control circuit 40 is electrically connected to the communication circuit 80, and the communication circuit 80 is communicatively connected to the vehicle high-voltage system 60 and the vehicle low-voltage system 70.
Based on the above embodiments, the vehicle-mounted power supply power circuit provided by the present invention has six operating modes, which specifically include:
the first working mode is as follows: only the vehicle high-voltage system 60 is operated.
Specifically, fig. 6 is a schematic configuration diagram of a first operation mode of the vehicle-mounted power supply circuit according to the embodiment of the present invention, and it can be seen from fig. 6 that, when only the vehicle high-voltage system 60 operates, the control circuit 40 controls the first winding 3021 and the first rectification circuit 3031 of the transformer 302 to operate, so that the energy on the primary side of the transformer is transferred to only the first winding 3021 of the transformer 302 and does not pass through the second winding 3022, thereby charging the vehicle high-voltage system 60.
And a second working mode: the vehicle high pressure system 60 and the vehicle low pressure system 70 operate simultaneously.
Specifically, fig. 7 is a schematic structural diagram of a second operation mode of the vehicle-mounted power supply power circuit in the embodiment of the utility model, and as can be seen from fig. 7, when the vehicle high-voltage system 60 and the vehicle low-voltage system 70 operate simultaneously, the control circuit 40 not only controls the first winding 3021 and the first rectification circuit 3031 of the transformer 302 to operate, but also controls the second winding 3022, the second rectification circuit 3041 and the voltage stabilizing circuit 3042 of the transformer 302 to operate, so that energy on the primary side of the transformer can be transferred to the first winding 3021 and the second winding 3022 of the transformer 302, thereby simultaneously charging the vehicle high-voltage system 60 and the vehicle low-voltage system 70.
The two paths of output energy share one magnetic core, so that the voltage state of only one winding can be controlled. The present embodiment selects to control the voltage of the later stage of the first winding 3021 of the transformer 302, and the voltage of the later stage of the second winding 3022 of the transformer 302 is controlled by the second winding 3022 of the transformer 302.
And a third working mode: only the vehicle low pressure system 70 is operating.
Specifically, fig. 8 is a schematic structural diagram of a third operation mode of the vehicle-mounted power supply power circuit in the embodiment of the utility model, and as can be seen from fig. 8, when only the vehicle low-voltage system 70 operates, the control circuit 40 controls the first winding 3021, the first rectification circuit 3031, the second winding 3022, the second rectification circuit 3041, and the voltage stabilizing circuit 3042 of the transformer 302 to operate, at this time, energy is provided by the vehicle high-voltage system 60, and the vehicle low-voltage system 70 is charged by sequentially passing through the first rectification circuit 3031, the first winding 3021, the second winding 3022, the second rectification circuit 3041, and the voltage stabilizing circuit 3042.
And a fourth working mode: the vehicle high voltage system 60 operates in reverse.
Specifically, fig. 9 is a schematic structural diagram of a fourth operation mode of the vehicle-mounted power supply circuit in the embodiment of the utility model, and it can be seen from fig. 9 that, when the vehicle high-voltage system 60 performs the inverter operation, the control circuit 40 controls the first winding 3021 of the transformer 302 and the first rectification circuit 3031 to operate, at this time, the primary side of the transformer 302 serves as an energy consumption side, and energy is provided by the vehicle high-voltage system 60 and is transmitted to the primary side of the transformer 302 through the first rectification circuit 3031 and the first winding 3021.
And a fifth working mode: the vehicle high-voltage system 60 operates in an inverter and the vehicle low-voltage system 70 operates.
Specifically, fig. 10 is a schematic structural diagram of a fifth operation mode of the vehicle-mounted power supply power circuit in the embodiment of the utility model, and as can be seen from fig. 10, when the vehicle high-voltage system 60 operates in an inverter mode and the vehicle low-voltage system 70 operates, the control circuit 40 controls the first winding 3021, the first rectification circuit 3031, the second winding 3022, the second rectification circuit 3041 and the voltage stabilizing circuit 3042 of the transformer 302 to operate, energy is provided by the vehicle high-voltage system 60, a part of the energy is transmitted to the primary side of the transformer 302 through the first rectification circuit 3031 and the first winding 3021, and a part of the energy is transmitted to the vehicle low-voltage system 70 through the first rectification circuit 3031, the first winding 3021, the second winding 3022, the second rectification circuit 3041 and the voltage stabilizing circuit 3042.
The two paths of output energy share one magnetic core, so that the voltage state of only one winding can be controlled. The present embodiment selects to control the secondary voltage of the primary side of the transformer 302, and the secondary voltage of the second winding 3022 of the transformer 302 is controlled by the second winding 3022 of the transformer 302.
And a sixth working mode: the vehicle low voltage system 70 operates in reverse.
Specifically, fig. 11 is a schematic structural diagram of a sixth operating mode of the vehicle-mounted power supply power circuit in the embodiment of the present invention, and as can be seen from fig. 11, when only the vehicle low-voltage system 70 operates in an inverter mode, the control circuit 40 controls the first winding 3021, the first rectification circuit 3031, the second winding 3022, the second rectification circuit 3041, and the voltage stabilizing circuit 3042 of the transformer 302 to operate, at this time, energy is provided by the vehicle low-voltage system 70, and is transmitted to the vehicle high-voltage system 60 through the voltage stabilizing circuit 3042, the second rectification circuit 3041, the second winding 3022, the first winding 3021, and the first rectification circuit 3031 in sequence.
Based on the same inventive concept, the embodiment of the present invention further provides a vehicle power supply, which includes a power grid/load 50, a vehicle high-voltage system 60, a vehicle low-voltage system 70, and a vehicle power supply power circuit provided in any embodiment of the present invention, so that the vehicle power supply provided in the embodiment of the present invention includes technical features of the vehicle power supply power circuit provided in any embodiment of the present invention, and can achieve beneficial effects of the vehicle power supply power circuit provided in the embodiment of the present invention.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the utility model. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. An in-vehicle power supply power circuit, comprising: the power factor correction PFC circuit comprises a filter circuit, a power factor correction PFC circuit, a voltage conversion circuit and a control circuit; wherein the content of the first and second substances,
the input end of the filter circuit is electrically connected with a power grid/load, and the output end of the filter circuit is electrically connected with the input end of the PFC circuit;
the output end of the PFC circuit is electrically connected with the input end of the voltage conversion circuit;
the output end of the voltage conversion circuit is respectively electrically connected with a vehicle high-voltage system and a vehicle low-voltage system;
the control circuit is respectively and electrically connected with the control end of the PFC circuit and the control end of the voltage conversion circuit.
2. The on-board power supply circuit according to claim 1, wherein the voltage conversion circuit includes: the inverter circuit, the transformer, the low-voltage conversion circuit and the high-voltage conversion circuit; wherein the content of the first and second substances,
the input end of the inverter circuit is electrically connected with the output end of the PFC circuit, and the output end of the inverter circuit is electrically connected with the primary side of the transformer;
the secondary side of the transformer comprises a first winding and a second winding; the first winding is electrically connected with the input end of the high-voltage conversion circuit, and the output end of the high-voltage conversion circuit is electrically connected with the vehicle high-voltage system; the second winding is electrically connected with the input end of the low-voltage conversion circuit, and the output end of the low-voltage conversion circuit is electrically connected with the vehicle low-voltage system.
3. The onboard power supply power circuit according to claim 2,
the high voltage conversion circuit includes: a first rectifying circuit;
the low voltage conversion circuit includes: a second rectifying circuit and a voltage stabilizing circuit; wherein the content of the first and second substances,
the second winding is electrically connected with the input end of the second rectifying circuit, the output end of the second rectifying circuit is electrically connected with the input end of the voltage stabilizing circuit, and the output end of the voltage stabilizing circuit is electrically connected with the vehicle low-voltage system.
4. The on-board power supply circuit of claim 3, wherein the PFC circuit comprises: the first inductor, the second inductor, the third inductor, the first switching tube, the second switching tube, the third switching tube, the fourth switching tube, the fifth switching tube and the sixth switching tube;
one end of the first inductor is electrically connected with a first output end of the filter circuit, the other end of the first inductor is electrically connected with a second end of the first switch tube and a third end of the second switch tube, the third end of the first switch tube is electrically connected with a first input end of the inverter circuit, and the second end of the second switch tube is electrically connected with a second input end of the inverter circuit;
one end of the second inductor is electrically connected with the second output end of the filter circuit, the other end of the second inductor is electrically connected with the second end of the third switching tube and the third end of the fourth switching tube, the third end of the third switching tube is electrically connected with the first input end of the inverter circuit, and the second end of the fourth switching tube is electrically connected with the second input end of the inverter circuit;
one end of the third inductor is electrically connected with a third output end of the filter circuit, the other end of the third inductor is electrically connected with a second end of the fifth switching tube and a third end of the sixth switching tube, the third end of the fifth switching tube is electrically connected with a first input end of the inverter circuit, and the second end of the sixth switching tube is electrically connected with a second input end of the inverter circuit;
the first ends of the first switch tube, the second switch tube, the third switch tube, the fourth switch tube, the fifth switch tube and the sixth switch tube are all connected with control signals.
5. The on-vehicle power supply power circuit according to claim 4, wherein the inverter circuit includes: a seventh switching tube, an eighth switching tube, a ninth switching tube and a tenth switching tube;
the first ends of the seventh switch tube, the eighth switch tube, the ninth switch tube and the tenth switch tube are all connected with the control signal;
a second end of the seventh switching tube and a third end of the eighth switching tube are electrically connected with one end of the primary side of the transformer, and a second end of the ninth switching tube and a third end of the tenth switching tube are electrically connected with the other end of the primary side of the transformer;
the third ends of the seventh switching tube and the ninth switching tube are electrically connected with the third ends of the first switching tube, the third switching tube and the fifth switching tube; second ends of the eighth switching tube and the tenth switching tube are electrically connected with second ends of the second switching tube, the fourth switching tube and the sixth switching tube.
6. The on-vehicle power supply power circuit according to claim 5, wherein the first rectification circuit includes: an eleventh switch tube, a twelfth switch tube, a thirteenth switch tube, a fourteenth switch tube and a first capacitor;
the first ends of the eleventh switch tube, the twelfth switch tube, the thirteenth switch tube and the fourteenth switch tube are all connected with the control signal;
the second end of the eleventh switch tube and the third end of the twelfth switch tube are electrically connected with one end of the first winding; the second end of the thirteenth switching tube and the third end of the fourteenth switching tube are electrically connected with the other end of the first winding;
the third ends of the eleventh switch tube and the thirteenth switch tube are electrically connected with one end of the first capacitor, and the second ends of the twelfth switch tube and the fourteenth switch tube are electrically connected with the other end of the first capacitor; the first capacitor is connected in parallel with the vehicle high-voltage system.
7. The on-vehicle power supply power circuit according to claim 5, wherein the second rectification circuit includes: a fifteenth switching tube, a sixteenth switching tube and a second capacitor; the voltage stabilizing circuit comprises: a seventeenth switching tube, an eighteenth switching tube, a third capacitor and a fourth inductor;
the first ends of the fifteenth switching tube and the sixteenth switching tube are both connected with the control signal;
a second end of the fifteenth switching tube is electrically connected with a first end of the second winding; the third end of the fifteenth switching tube is electrically connected with the second end of the sixteenth switching tube; the third end of the sixteenth switching tube is electrically connected with the third end of the second winding;
a second end of the second winding is electrically connected with one end of the second capacitor, and the other end of the second capacitor is electrically connected with a second end of the sixteenth switching tube;
the first ends of the seventeenth switching tube and the eighteenth switching tube are both connected with the control signal;
a third end of the seventeenth switching tube is electrically connected with one end of the second capacitor, a second end of the seventeenth switching tube is electrically connected with a third end of the eighteenth switching tube, and a second end of the eighteenth switching tube is electrically connected with the other end of the second capacitor;
one end of the fourth inductor is electrically connected with the second end of the seventeenth switching tube, the other end of the fourth inductor is electrically connected with one end of the third capacitor, and the other end of the third capacitor is electrically connected with the other end of the second capacitor.
8. The on-board power supply circuit of claim 6, wherein the voltage conversion circuit further comprises: a fourth capacitor, a fifth inductor and a sixth inductor;
the fifth inductor is arranged between one end of the primary side of the transformer and the second end of the seventh switching tube and the third end of the eighth switching tube; the fourth capacitor is arranged between the other end of the primary side of the transformer and the second end of the ninth switching tube and the third end of the tenth switching tube;
the sixth inductor is arranged between the other end of the first winding and the second end of the thirteenth switching tube and the third end of the fourteenth switching tube; the fifth capacitor is arranged between one end of the first winding and the second end of the eleventh switch tube and the third end of the twelfth switch tube.
9. The onboard power supply power circuit according to any one of claims 1-8, further comprising: a communication circuit; the control circuit is in communication connection with the vehicle high-voltage system and the vehicle low-voltage system through the communication circuit.
10. An onboard power supply, characterized by comprising a power grid/load, a vehicle high voltage system, a vehicle low voltage system and an onboard power supply power circuit according to any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220038915.1U CN216721201U (en) | 2022-01-07 | 2022-01-07 | Vehicle-mounted power supply power circuit and vehicle-mounted power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220038915.1U CN216721201U (en) | 2022-01-07 | 2022-01-07 | Vehicle-mounted power supply power circuit and vehicle-mounted power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216721201U true CN216721201U (en) | 2022-06-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220038915.1U Active CN216721201U (en) | 2022-01-07 | 2022-01-07 | Vehicle-mounted power supply power circuit and vehicle-mounted power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216721201U (en) |
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2022
- 2022-01-07 CN CN202220038915.1U patent/CN216721201U/en active Active
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