CN113895382B - Vehicle power supply circuit, equipment and car - Google Patents
Vehicle power supply circuit, equipment and car Download PDFInfo
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- CN113895382B CN113895382B CN202111180330.XA CN202111180330A CN113895382B CN 113895382 B CN113895382 B CN 113895382B CN 202111180330 A CN202111180330 A CN 202111180330A CN 113895382 B CN113895382 B CN 113895382B
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- power supply
- supply circuit
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Abstract
The invention discloses a vehicle power supply circuit, equipment and an automobile, and relates to the technical field of automobile power supply systems. The vehicle power supply circuit includes: the power battery comprises a plurality of battery packs which are connected in sequence; the input end of each first power supply circuit is connected with the output end of the corresponding battery pack, and the output end of each first power supply circuit is connected with the first power supply end; the input end of the second power supply circuit is connected with the output end of the power battery, and the output end of the second power supply circuit is connected with the first power supply end and the second power supply end respectively; and the fusing element is arranged between the input ends of the adjacent two first power supply circuits. The invention obtains a plurality of power supplies by converting the output power supply of each battery pack; the first power supply circuit is arranged on the inner side of the fusing element, so that after the fusing element is disconnected, the first power supply circuit can still output a low-voltage power supply, the power supply of the vehicle part of the low-voltage devices is ensured, and the safety of the vehicle is improved.
Description
Technical Field
The present invention relates to the field of automotive power systems, and in particular, to a power supply circuit and apparatus for a vehicle, and an automobile.
Background
The power supply system of the new energy automobile is divided into a high-voltage power supply system and a low-voltage power supply system, wherein the power supply object of the low-voltage power supply system mainly comprises vehicle-mounted piezoelectric devices, such as various controllers (a power management controller, a whole automobile controller, a motor controller and the like), instruments, a display, a communication module and the like. However, when the power supply of the low-voltage power supply system is abnormal at present, if the whole vehicle is in a condition of not allowing power down (such as high-speed running), abnormal power down of each piezoelectric device in the vehicle can be caused, so that potential safety hazards exist for the vehicle.
Disclosure of Invention
The invention mainly aims to provide a vehicle power supply circuit, which aims to solve the technical problems that in the prior art, the power supply source of a vehicle low-voltage power supply system is abnormal and the vehicle is abnormally powered down.
In order to achieve the above object, the present invention provides a vehicle power supply circuit including:
the power battery comprises a plurality of battery packs which are connected in sequence;
the input end of each first power supply circuit is connected with the output end of the corresponding battery pack, and the output end of each first power supply circuit is connected with the first power supply end;
the input end of the second power supply circuit is connected with the output end of the power battery, the output end of the second power supply circuit is respectively connected with the first power supply end and the second power supply end, and the output power of the second power supply circuit is larger than that of the first power supply circuit;
and the fusing element is arranged between the input ends of the adjacent two first power supply circuits.
Optionally, the first power supply circuit includes:
and the input end of the flyback conversion circuit is connected with the output end of the corresponding battery pack, and the output end of the flyback conversion circuit is connected with the first power supply end and is used for carrying out voltage reduction treatment on the output power supply of the battery pack.
Optionally, the flyback converter circuit includes:
the primary coil of the transformer is connected with the output end of the power battery;
the power switch tube is arranged on a loop between the primary coil and the power battery and used for controlling the on-off of the loop;
and the input end of the output circuit is connected with the secondary coil of the transformer, and the output end of the output circuit is connected with the first power supply end.
Optionally, the vehicle power supply circuit further includes:
and the input end of the switching circuit is connected with the output end of each first power supply circuit, and the output end of the switching circuit is connected with the first power supply ends and is used for transmitting the output power supply of each first power supply circuit to the first power supply ends.
Optionally, the switching circuit includes:
and the anodes of the diodes are connected with the output ends of the corresponding first power supply circuits, and the cathodes of the diodes are connected with the first power supply ends.
Optionally, the switching circuit further includes:
and the first switches are arranged between the anodes of the corresponding diodes and the output end of the first power supply circuit.
Optionally, the vehicle power supply circuit further includes:
and the output ends of the third power supply circuits are respectively connected with the first power supply end and the third power supply end.
Optionally, the vehicle power supply circuit further includes:
the second switch is arranged between the output end of the power battery and the input end of the second power supply circuit;
the third switch is arranged between the input end of the first power supply circuit and the input end of the corresponding third power supply circuit;
and the switch driving circuit is connected with the first power supply end and used for controlling the on-off of the second switch and the third switch.
In order to achieve the above object, the present invention also proposes a vehicle power supply apparatus including the vehicle power supply circuit as described above.
In order to achieve the above object, the present invention also proposes an automobile comprising the vehicle power supply apparatus as described above.
In the present invention, a vehicle power supply circuit includes: the power battery comprises a plurality of battery packs which are connected in sequence; the input end of each first power supply circuit is connected with the output end of the corresponding battery pack, and the output end of each first power supply circuit is connected with the first power supply end; the input end of the second power supply circuit is connected with the output end of the power battery, the output end of the second power supply circuit is respectively connected with the first power supply end and the second power supply end, and the output power of the second power supply circuit is larger than that of the first power supply circuit; and the fusing element is arranged between the input ends of the adjacent two first power supply circuits. The invention obtains a plurality of power supplies by converting the output power supply of each battery pack; the first power supply circuit is arranged on the inner side of the fusing element, so that after the fusing element is disconnected, the first power supply circuit can still output a low-voltage power supply, the power supply of the vehicle part of the low-voltage devices is ensured, and the safety of the vehicle is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic circuit diagram of a first embodiment of a power supply circuit for a vehicle according to the present invention;
FIG. 2 is a schematic circuit diagram of a second embodiment of a power supply circuit for a vehicle according to the present invention;
FIG. 3 is a schematic circuit diagram of an embodiment of a switching circuit according to the present invention;
FIG. 4 is a schematic circuit diagram of another embodiment of the switching circuit of the present invention;
FIG. 5 is a schematic circuit diagram of an embodiment of a flyback converter circuit according to the present invention;
fig. 6 is a schematic circuit diagram of a third embodiment of a power supply circuit for a vehicle according to the present invention.
Reference numerals illustrate:
| reference numerals | Name of the name | Reference numerals | Name of the name |
| 100 | Battery pack | 900 | Switch driving circuit |
| 200 | First power supply circuit | K1～K3 | First to third switches |
| 2001 | Flyback converter circuit | D | Diode |
| 300 | First power supply terminal | T | Transformer |
| 400 | Second power supply circuit | Q | Power switch tube |
| 500 | A second power supply terminal | C | Capacitance device |
| 600 | Switching circuit | R | Resistor |
| 700 | Third power supply circuit | FU | Fuse element |
| 800 | Third power supply terminal |
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the technical solutions should be considered that the combination does not exist and is not within the scope of protection claimed by the present invention.
Referring to fig. 1, fig. 1 is a schematic circuit diagram of a first embodiment of a power supply circuit for a vehicle according to the present invention. The present invention proposes a first embodiment of a vehicle power supply circuit.
In a first embodiment, a vehicle power supply circuit includes: a power battery including a plurality of battery packs 100 connected in sequence; the input end of each first power supply circuit 200 is connected with the output end of the corresponding battery pack 100, and the output end of each first power supply circuit 200 is connected with the first power supply end 300; the input end of the second power supply circuit 400 is connected with the output end of the power battery, the output end of the second power supply circuit 400 is respectively connected with the first power supply end 300 and the second power supply end 500, and the output power of the second power supply circuit 400 is larger than that of the first power supply circuit 200; the fuse element FU is disposed between the input terminals of two adjacent first power supply circuits 200.
It should be noted that, the power battery 100 may be a main power supply of the vehicle, typically, a high-voltage direct-current power supply, and the power supply object may include a vehicle-mounted air conditioner, a motor, or other devices, and the voltage value may reach 300V or 400V. In particular implementations, the power cells 100 are typically comprised of a plurality of power modules connected in series, and each battery pack 100 may include one or more battery modules. The voltage values of the respective battery packs may be the same or different, for example, the voltage value of a part of the battery packs is 100V, the voltage value of a part of the battery packs is 200V, and the specific voltages of the respective battery packs may be set according to the requirements, which is not limited in this embodiment.
In this embodiment, the first power supply terminal 300 and the second power supply terminal 500 are used for supplying power to different vehicle-mounted low-voltage apparatuses, such as various controllers (power management controller, vehicle controller, motor controller, etc.), meters, displays, communication modules, etc. Therefore, the voltages output by the first power supply circuit 200 and the second power supply circuit 400 are low voltages, such as 3V, 5V, or 12V.
In a specific implementation, each of the first power supply circuit 200 and the second power supply circuit 400 may include a voltage reducing circuit, which are connected in parallel, so as to respectively perform voltage reducing processing on the output power sources of each battery pack 100 and the power battery, thereby obtaining a low voltage power source. The input ends of the first power supply circuit 200 and the second power supply circuit 400 may be input sides of the step-down circuit, and the output ends of the first power supply circuit 200 and the second power supply circuit 400 may be output sides of the step-down circuit. The two connection ends of the input side of the voltage reduction circuit are connected with the positive electrode and the negative electrode of the power battery to form a high-voltage loop, and the two connection ends of the output side of the voltage reduction circuit are connected with the first power supply end 300 and/or the second power supply end 500 to form a low-voltage loop. The buck circuit may be formed by a unidirectional buck converter or a bidirectional buck-boost converter, which has already been known in the art, and this embodiment will not be described here again.
It can be appreciated that by using multiple power supplies for low-voltage electric appliances in a vehicle, power failure of all the electric appliances in the whole vehicle caused by failure of a certain power supply can be avoided. Meanwhile, to match the power requirements of different electric appliances, the output power of each first power supply circuit 200 and the output power of each second power supply circuit 400 may be different, specifically, the output power of each second power supply circuit 400 is greater than the output power of each first power supply circuit 200, and the output power of each first power supply circuit 200 may also be different, and the output power may be the maximum output power. Therefore, the high-power electric device and the low-power electric device are distinguished and are respectively connected with different power supply ends, so that the design power of the power supply circuit can be reduced, and the cost is reduced.
It can be appreciated that by using multiple power supplies for low-voltage electric appliances in a vehicle, power failure of all the electric appliances in the whole vehicle caused by failure of a certain power supply can be avoided. Meanwhile, to match the power requirements of different electric appliances, the output power of the first power supply circuit 200 and the output power of the second power supply circuit 400 may be different, and specifically, the output power of the second power supply circuit 400 is greater than the output power of the first power supply circuit 200, and the output power may be the maximum output power. Therefore, the high-power electric device and the low-power electric device are distinguished and are respectively connected with different power supply ends, so that the design power of the power supply circuit can be reduced, and the cost is reduced. For example, if the maximum peak power in each low-voltage electrical appliance is 3kw, the output power of the second power supply circuit 400 may be 3kw, and the output power of the first power supply circuit 200 may be 100w.
In a specific implementation, in order to ensure stable operation of each low-voltage electrical apparatus in the vehicle, different power supply modes may be configured for each low-voltage electrical apparatus. For example, the first power supply terminal 300 may be connected to critical electrical devices in the vehicle (e.g., a vehicle core controller, a power management module, etc.), and the second power supply terminal 500 may be connected to conventional electrical devices in the vehicle (e.g., a meter, a communication module, etc.). Therefore, the key electric devices in the vehicle can be powered by double power supplies, and the operation stability of the key electric devices is ensured. Even if some of the battery packs 100 are abnormal, other normal battery packs 100 can supply power to the key electric devices, so that the running stability of the vehicle is ensured.
It should be noted that, a control unit may be disposed between the first power supply terminal 300 and the second power supply terminal 500 and each low-voltage electrical apparatus, so as to control the communication state between each low-voltage electrical apparatus and the first power supply terminal 300 or the second power supply terminal 500, thereby controlling the power-on or power-off of each low-voltage electrical apparatus; wherein the driving of the control units may be controlled by a vehicle core controller.
As one example, each low voltage device on the vehicle may be powered by the following control strategy: at the time of starting the vehicle, key electric devices in the vehicle are supplied by the respective first power supply circuits 200 through the first power supply terminal 300, and conventional electric devices in the vehicle are supplied by the second power supply circuits 400 through the second power supply terminal 500. When the vehicle is started and enters a normal running state, the second power supply circuit 400 supplies power to all the piezoelectric devices of the vehicle preferentially through the first power supply end 300 and the second power supply end 500. If the second power supply circuit 400 is abnormal during the driving process, the first power supply circuits 200 supply power to the key electric devices in the vehicle through the first power supply terminals 300, so that the key electric devices are prevented from being powered down, and the safety of the vehicle is ensured.
It should be noted that, the first power supply circuit 200 may also increase the low voltage power supply to the second power supply terminal 500, so as to supply power to the conventional electrical device. Since the output power of the first power supply circuit 200 is low, when the conventional electric device is powered, some electric devices may not work normally, and at this time, the high-power electric device may be turned off to ensure that the output of the first power supply circuit 200 is stable.
It will be appreciated that to protect the power battery, a corresponding fuse element FU is typically provided in the vehicle for the power battery to open when the output current of the power battery is excessive. In a specific implementation, the fuse element FU may be a fuse or a fuse, and this embodiment is not limited thereto.
In the present embodiment, since the low-voltage battery is eliminated, fuse elements FU are provided between the input terminals of each first power supply circuit 200 and between each battery pack 100 in order to ensure stable power supply to the vehicle. After the fuse element FU is broken, although the second power supply circuit 400 cannot supply the low-voltage power supply, since each flyback converter circuit 2001 is powered by each battery pack 100, the low-voltage power supply can still be output, thereby supplying the low-voltage power supply to the key electric device, avoiding the power failure of the key electric device, and improving the safety of the vehicle.
It should be noted that, one or more fuse elements FU may be disposed in the power battery, and in this case, the power battery may be divided into a plurality of battery packs 100 according to the positions of the fuse elements FU, for example, if two fuse elements FU are disposed in the power battery, the power battery is divided into three battery packs 100; if three fuse elements FU are provided in the power battery, the power battery is divided into four battery packs 100.
In a first embodiment, a vehicle power supply circuit includes: a power battery including a plurality of battery packs 100 connected in sequence; the input end of each first power supply circuit 200 is connected with the output end of the corresponding battery pack 100, and the output end of each first power supply circuit 200 is connected with the first power supply end 300; the input end of the second power supply circuit 400 is connected with the output end of the power battery, the output end of the second power supply circuit 400 is respectively connected with the first power supply end 300 and the second power supply end 500, and the output power of the second power supply circuit 400 is larger than that of the first power supply circuit 200; and the fusing element is arranged between the input ends of the adjacent two first power supply circuits. In the present embodiment, a plurality of power supplies are obtained by converting the output power of each battery pack 100; the first power supply circuit 200 is arranged on the inner side of the fuse element FU, so that after the fuse element FU is disconnected, the first power supply circuit 200 can still output a low-voltage power supply, and the power supply of a part of the vehicle piezoelectric devices is ensured, and the safety of the vehicle is improved.
Referring to fig. 2, fig. 2 is a schematic circuit diagram of a second embodiment of a power supply circuit for a vehicle according to the present invention. Based on the first embodiment described above, the present invention proposes a second embodiment of the vehicle power supply circuit.
In the second embodiment, the first power supply circuit 200 includes: the input end of the flyback converter circuit 2001 is connected with the output end of the corresponding battery pack 100, and the output end of the flyback converter circuit 2001 is connected with the first power supply end 300 for performing step-down processing on the output power supply of the battery pack 100.
The flyback converter circuit 2001 may include a flyback transformer, and the output side thereof outputs power when the input side is disconnected from the power supply. In a specific implementation, two connections on the input side of the flyback transformer are connected to the positive and negative poles of the power battery 100 to form a high voltage loop, and two connections on the output side of the flyback transformer are connected to the switching circuit 600 to form a low voltage loop. The output power of the flyback converter 2001 is generally low, for example, about 100w, and the specific value of the output voltage can be set as needed, which is not limited in this embodiment.
In the present embodiment, in order to facilitate control of the output voltage of each flyback converter circuit 2001, the vehicle power supply circuit may further include: and the input end of the switching circuit 600 is connected with the output end of each first power supply circuit 200, and the output end of the switching circuit 600 is connected with the first power supply end 300 and is used for transmitting the output power supply of each first power supply circuit 200 to the first power supply end 300.
In the present embodiment, the switching circuit 600 is configured to select each input voltage and output the selected input voltage. In this embodiment, the switching circuit 600 may be connected to an input end of the second power supply end 500, and the first power supply end 300 may receive the output power of each first power supply circuit 200 and the power to which the second power supply end 500 is connected, where the power to which the second power supply end 500 is connected may be the output power of the second power supply circuit 400. Thus, to facilitate selection of power sources, the switching circuit 600 may be used to switch the output power sources described above.
Referring to fig. 3, fig. 3 is a schematic circuit diagram of an embodiment of a switching circuit according to the present invention. As shown in fig. 3, the switching circuit 600 may include: and a plurality of diodes D, each having an anode connected to the output terminal of the corresponding first power supply circuit 200 and a cathode connected to the first power supply terminal 300.
The anodes of the diodes D are connected to the output terminals of the corresponding flyback converter circuits 2001, so that the power supply output from each flyback converter circuit 2001 is received, and the number of diodes D can be determined according to the first power supply circuit 200. In addition, in order to facilitate the connection and control of the power source connected to the second power supply terminal 500, an anode of a diode D may be further disposed in the switching circuit 600 and connected to the input terminal of the second power supply terminal 500, where the diode D is used to connect to the output power source of the second power supply circuit 400. In this embodiment, the switching circuit 600 may combine the flyback converter circuits 2001 with the power source connected to the input terminal of the second power supply terminal 500, and then transmit the combined power source to the first power supply terminal 300.
Referring to fig. 4, fig. 4 is a schematic circuit diagram of another embodiment of the switching circuit of the present invention. As shown in fig. 4, the switching element is added to the embodiment based on fig. 3, and specifically, the switching circuit 600 may further include: the first switches K1 are disposed between the anode of the corresponding diode D and the output terminal of the first power supply circuit 200.
It should be noted that, the first switch K1 may be controlled by the power management module, and the first switch K1 may be a relay or the like. In a specific implementation, each of the first switches K1 may be controlled separately, thereby achieving a simultaneous output or a single output. Or a portion of the first switches K1 are formed as exclusive switches, with only one switch in the portion K1 being in a closed state at the same time, thereby interlocking the outputs.
It should be noted that, to ensure power supply of low-voltage appliances as much as possible, the first power supply circuit 200 may also provide power to the second power supply terminal 500. In a specific implementation, a diode opposite to the diode D may be further disposed between the input end of the first power supply terminal 300 and the second power supply terminal 500, where an anode of the diode is connected to the first power supply terminal 300, and a cathode of the diode is connected to the second power supply terminal 500; meanwhile, a switch mutually exclusive to the first switch K1 is further disposed between the cathode of the diode and the second power supply terminal 500, and only one of the switch and the first switch K1 connected to the second power supply terminal 500 can be in a closed state at the same time.
Referring to fig. 5, fig. 5 is a schematic circuit diagram of an embodiment of a flyback converter according to the present invention. As shown in fig. 5, the flyback converter 2001 includes: a transformer T, the primary coil of which is connected to the output end of the corresponding battery pack 100; the power switch tube Q is arranged on a loop between the primary coil and the corresponding battery pack 100 and used for controlling the on-off of the loop; and the input end of the output circuit is connected with the secondary coil of the transformer T, and the output end of the output circuit is connected with the first power supply end 300.
It should be noted that, the transformer T is a flyback transformer, and the power switch Q may be a MOS (Metal-Oxide-Semiconductor) transistor. One side of a primary coil of the transformer T is connected with the positive electrode of the power battery 100, the other side of the primary coil of the transformer T is connected with the drain electrode of the power switch tube Q, the source electrode of the power switch tube Q is connected with the negative electrode of the power battery 100, and the grid electrode of the power switch tube Q is connected with the driving circuit. The driving circuit is used for controlling the on-off of the power switch tube Q, so as to regulate the output of the transformer T, and the driving of the transformer T and the power switch tube Q has already been implemented by a mature technology, which is not described herein in detail.
In this embodiment, the output circuit may include a diode D, a capacitor C and a resistor R, where the capacitor C and the resistor R are connected in parallel to two sides of the secondary winding of the transformer T, an anode of the diode D is connected to one side of the secondary winding of the transformer T, and a cathode of the diode D is connected to the first power supply terminal 300 through the switching circuit 600, and the diode D may perform a rectifying function.
In the second embodiment, the flyback converter circuit 2001, the input terminal of the flyback converter circuit 2001 is connected with the output terminal of the corresponding battery pack 100, for performing a step-down process on the output power supply of the battery pack 100; and the input end of the switching circuit 600 is connected with the output end of each first power supply circuit 200, and the output end of the switching circuit 600 is connected with the first power supply end 300 and is used for transmitting the output power supply of each first power supply circuit 200 to the first power supply end 300. In this embodiment, the switching circuit 600 is configured to select each power supply, so as to adapt to the power supply strategies under different situations, and make the power supply configuration more flexible.
Referring to fig. 6, fig. 6 is a schematic circuit diagram of a third embodiment of a power supply circuit for a vehicle according to the present invention. Based on the first and second embodiments described above, the present invention proposes a third embodiment of the vehicle power supply circuit.
In a third embodiment, the vehicle power supply circuit further includes:
and the input end of each third power supply circuit 700 is connected with the input end of the corresponding first power supply circuit 200, and the output end of each third power supply circuit 700 is respectively connected with the first power supply end 300 and the third power supply end 800.
It should be noted that, because the power supply requirements of the piezoelectric devices in the vehicle are different, to meet the different power supply requirements, the vehicle power supply circuit may further include a plurality of third power supply circuits 700, where each third power supply circuit 700 is connected to an output terminal of a corresponding flyback converter circuit 2001. The output power of the third power supply circuit 700 is greater than the output power of the first power supply circuit 200, and the output power of the third power supply circuit 700 is less than the output power of the second power supply circuit 400.
In this embodiment, in order to control the output power of each third power supply circuit 700, the output terminal of each third power supply circuit 700 may be connected to a switching circuit 600, and the output terminal of each third power supply circuit 700 may be connected to the first power supply terminal 300 through the switching circuit 600. The specific structure of the switching circuit 600 may refer to the second embodiment, and the specific structure of the third power supply circuit 700 may also refer to the first embodiment, which is not described herein.
In order to control each power supply, the vehicle power supply circuit further includes: the second switch K2 is arranged between the output end of the power battery and the input end of the second power supply circuit 400; the third switch K3, the third switch K3 is disposed between the output end of the first power supply circuit 200 and the input end of the corresponding third power supply circuit 700; and the switch driving circuit 900 is connected with the first power supply end 300 and is used for controlling the on-off of the second switch K2 and the third switch K3.
It can be understood that, when the second switch K2 is in the closed state, the second power supply circuit 400 can receive the power output by the power battery, and output the low-voltage power supply after voltage conversion, and the second power supply terminal 500 can receive the low-voltage power supply. When the second switch K2 is in the off state, the second power supply circuit 400 has no power input, and no low-voltage power supply output. When the third switch K3 is in the closed state, the third power supply circuit 700 can receive the power output by the corresponding battery pack 100, and then output the low-voltage power supply after voltage conversion, and the third power supply terminal 800 can receive the low-voltage power supply. When the third switch K3 is in the off state, the third power supply circuit 700 has no power input, nor has the low-voltage power supply output.
It should be noted that, the power supply terminal of the switch driving circuit 900 is connected to the first power supply terminal 300, and the first power supply terminal 300 provides the working power for the switch driving circuit 900. After receiving the working power supply, the switch driving circuit 900 controls the on-off of the second switch K2 and the third switch K3 according to a preset control logic. The specific control logic may be set according to the user's requirement, which is not limited in this embodiment.
In a specific implementation, since the output of the battery pack 100 is a high voltage power source, the second switch K2 may include a positive relay and a negative relay in order to improve the safety of the circuit. The contact switch of the positive relay is arranged between the positive electrode of the power battery and the second power supply circuit 400, the contact switch of the negative relay is arranged between the negative electrode of the power battery and the second power supply circuit 400, and coils of the positive relay and the negative relay are arranged in the switch driving circuit 900. The third switch K3 may be a relay switch, a contact switch of the relay may be disposed between the third power supply circuit 700 and the negative electrode or the whole battery pack 100, and coils of the relay may be disposed in the switch driving circuit 900.
The switch driving circuit 900 may include a plurality of relay coil driving circuits, each of which is controlled by a power management module (not shown) to control coils of each relay, respectively, thereby controlling on/off of the second switch K2 and the third switch K3. Each relay coil driving circuit is powered by the first power supply terminal 300, and the power management module can also be powered by the first power supply terminal 300.
In the present embodiment, the vehicle power supply circuit may supply three power supplies, and may supply power according to the classification of each low-voltage device. For example, the first power supply terminal 300 supplies power to the core controller and the key controller of the vehicle, the third power supply terminal 800 supplies power to the safety-related electric devices and controllers of the vehicle, and the second power supply terminal 500 supplies power to the conventional electric devices. As one example, the control strategy for vehicle power may be: when the vehicle starts, the first power supply circuit 200 supplies power to the vehicle core controller and the key controller through the first power supply terminal 300, that is, the voltage V3 accessed by the first power supply terminal 300 is the output voltage of each flyback converter circuit 2001; after the start-up, the second switch K2 is closed, and the second power supply circuit 200 supplies power to all the piezoelectric devices of the vehicle through the first power supply terminal 300, the second power supply terminal 500, and the third power supply terminal 800, that is, v3=v1, v2=v1. After the second power supply circuit 400 is abnormal or the second switch K2 is opened, the third switch K3 is closed, and the third power supply circuit 700 may supply power to the corresponding electric device through the first power supply terminal 300 and the third power supply terminal 800, that is, v3=v2. If the third switch K3 is closed and abnormal occurs, the flyback converter 2001 supplies power to the vehicle core controller and the key controller through the first power supply terminal 300, so as to avoid power failure of the key low-voltage device of the vehicle.
In a third embodiment, the vehicle power supply circuit further includes: the input ends of the third power supply circuits 700 are connected with the input ends of the corresponding first power supply circuits 200, and the output ends of the third power supply circuits 700 are respectively connected with the first power supply end 300 and the third power supply end 800; the second switch K2 is arranged between the output end of the power battery and the input end of the second power supply circuit 400; the third switch K3, the third switch K3 is disposed between the output end of the first power supply circuit 200 and the input end of the corresponding third power supply circuit 700; and the switch driving circuit 900 is connected with the first power supply end 300 and is used for controlling the on-off of the second switch K2 and the third switch K3. According to the embodiment, the power supply is additionally arranged, and the corresponding switch is configured, so that the control of the power supply of the vehicle is facilitated, and the flexibility of the configuration of the power supply strategy of the vehicle is improved.
In order to achieve the above object, the present invention also proposes a vehicle power supply apparatus including the vehicle power supply circuit as described above. The specific structure of the vehicle power supply circuit refers to the above embodiments, and since the vehicle power supply device can adopt the technical solutions of all the embodiments, the vehicle power supply circuit at least has the beneficial effects brought by the technical solutions of the embodiments, and will not be described in detail herein.
In order to achieve the above object, the present invention also proposes an automobile comprising the vehicle power supply apparatus as described above. The specific structure of the vehicle power supply device refers to the above embodiments, and since the present vehicle may adopt the technical solutions of all the embodiments, the present vehicle power supply device at least has the beneficial effects brought by the technical solutions of the embodiments, which are not described in detail herein.
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the invention, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.
Claims (10)
1. A vehicle power supply circuit, characterized in that the vehicle power supply circuit comprises:
the power battery comprises a plurality of battery packs which are connected in sequence;
the input end of each first power supply circuit is connected with the output end of the corresponding battery pack, and the output end of each first power supply circuit is connected with the first power supply end;
the input end of the second power supply circuit is connected with the output end of the power battery, the output end of the second power supply circuit is respectively connected with the first power supply end and the second power supply end, the output power of the second power supply circuit is larger than that of the first power supply circuit, and the first power supply circuit and the second power supply circuit are independently arranged;
the fuse element is arranged between the input ends of two adjacent first power supply circuits, and the first power supply circuits are arranged on the inner sides of the fuse elements;
the first power supply circuit and the second power supply circuit are both provided with a voltage reduction circuit, the input end of the voltage reduction circuit is connected with the anode and the cathode of the power battery to form a high-voltage loop, and the output end of the voltage reduction circuit is connected with the output end of the first power supply circuit and/or the output end of the second power supply circuit to form a low-voltage loop.
2. The vehicle power supply circuit of claim 1, wherein the first power supply circuit comprises:
and the output end of the flyback conversion circuit is connected with the first power supply end and is used for carrying out voltage reduction treatment on an output power supply of the battery pack.
3. The vehicle power supply circuit of claim 2, wherein the flyback conversion circuit comprises:
the primary coil of the transformer is connected with the output end of the power battery;
the power switch tube is arranged on a loop between the primary coil and the power battery and used for controlling the on-off of the loop;
and the input end of the output circuit is connected with the secondary coil of the transformer, and the output end of the output circuit is connected with the first power supply end.
4. The vehicle power supply circuit of claim 2, wherein the vehicle power supply circuit further comprises:
and the input end of the switching circuit is connected with the output end of each first power supply circuit, and the output end of the switching circuit is connected with the first power supply end and is used for transmitting the output power supply of each first power supply circuit to the first power supply end.
5. The vehicle power supply circuit of claim 4, wherein the switching circuit comprises:
and the anodes of the diodes are connected with the output ends of the corresponding first power supply circuits, and the cathodes of the diodes are connected with the first power supply ends.
6. The vehicle power supply circuit of claim 5, wherein said switching circuit further comprises:
and the first switches are arranged between the anodes of the corresponding diodes and the output end of the first power supply circuit.
7. The vehicle power supply circuit of any of claims 1-6, wherein the vehicle power supply circuit further comprises:
and the input end of each third power supply circuit is connected with the input end of the corresponding first power supply circuit, and the output end of each third power supply circuit is respectively connected with the first power supply end and the third power supply end.
8. The vehicle power supply circuit of claim 7, wherein the vehicle power supply circuit further comprises:
the second switch is arranged between the output end of the power battery and the input end of the second power supply circuit;
the third switch is arranged between the input end of the first power supply circuit and the input end of the corresponding third power supply circuit;
and the switch driving circuit is connected with the first power supply end and used for controlling the on-off of the second switch and the third switch.
9. A vehicle power supply apparatus, characterized in that it comprises the vehicle power supply circuit according to any one of claims 1 to 8.
10. An automobile, characterized in that the automobile comprises the vehicle power supply apparatus according to claim 9.
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| CN202111180330.XA CN113895382B (en) | 2021-10-09 | 2021-10-09 | Vehicle power supply circuit, equipment and car |
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| CN202111180330.XA CN113895382B (en) | 2021-10-09 | 2021-10-09 | Vehicle power supply circuit, equipment and car |
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| CN113895382B true CN113895382B (en) | 2023-08-15 |
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Also Published As
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| CN113895382A (en) | 2022-01-07 |
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