WO2023125615A1

WO2023125615A1 - Vehicle-mounted power distribution apparatus, and electric vehicle

Info

Publication number: WO2023125615A1
Application number: PCT/CN2022/142640
Authority: WO
Inventors: 王超
Original assignee: 长春捷翼汽车科技股份有限公司
Priority date: 2021-12-29
Filing date: 2022-12-28
Publication date: 2023-07-06
Also published as: CN217563344U

Abstract

The present invention relates to the field of new energy vehicles and, in particular, to a vehicle-mounted power distribution apparatus and an electric vehicle. The vehicle-mounted power distribution apparatus comprises a vehicle-mounted power distribution box and a charging panel mounted near the vehicle-mounted power distribution box; a high-voltage connector is arranged on the vehicle-mounted power distribution box; a high-voltage wiring plug connector is arranged on the charging panel; a high-voltage connector of the vehicle-mounted power distribution box is connected to the high-voltage wiring plug connector of the charging panel; an inverter circuit is arranged in the vehicle-mounted power distribution box and is used for converting high-voltage alternating current of the charging panel into low-voltage direct current; the low-voltage direct current is used for supplying power to a vehicle-mounted low-voltage system. In the present apparatus, when the storage battery of an automobile is fed, the low-voltage system can be charged by means of a socket, the socket is disconnected after the low-voltage system operates normally, and temporary charging of the feed storage battery is achieved and the user experience is improved.

Description

Vehicle-mounted power distribution device and electric vehicle

The present invention claims the priority of the Chinese patent application with application number 202123358532.7 and titled "A Vehicle Power Distribution Device and Electric Vehicle" filed on December 29, 2021, the entire contents of which are incorporated in this application by reference.

technical field

This article relates to the field of new energy vehicles, in particular to an on-board power distribution device and an electric vehicle using the on-board power distribution device.

Background technique

With the development of battery technology, new energy vehicles have gradually entered people's daily life.

When the new energy vehicle is not working for a long time, the low-voltage battery of the new energy vehicle is prone to power feeding. The low voltage system is not working properly.

Contents of the invention

In order to solve the above-mentioned problems in the prior art, the embodiment of this paper provides a vehicle-mounted power distribution device, including a vehicle-mounted power distribution box, and a charging panel installed near the vehicle-mounted power distribution box; the vehicle-mounted power distribution box is provided with a high-voltage connector; the charging panel is provided with a high-voltage wiring connector; the high-voltage connector of the vehicle-mounted power distribution box is connected to the high-voltage wiring connector of the charging panel; the vehicle-mounted power distribution box is provided with an inverter The circuit is used to convert the high-voltage alternating current of the charging panel into low-voltage direct current, and the low-voltage direct current is used to supply power to the vehicle low-voltage system.

According to an aspect of the embodiments herein, the inverter circuit includes a drive module, a filter module, a rectifier module, a transformer module, and an output module, for inverting the high-voltage alternating current of the charging panel and outputting the Low voltage direct current.

According to an aspect of the embodiments herein, the filter module includes a filter coil for filtering out unstable components in the high-voltage alternating current; the transforming module includes a transformer for performing high-voltage components in the high-voltage alternating current step-down processing; the rectification module includes a bridge rectification circuit composed of multiple diodes; the output module includes an output electrode for outputting the low-voltage direct current.

According to an aspect of the embodiments herein, a low-voltage DC connector is provided outside the vehicle-mounted power distribution box, and the output electrodes in the output module are connected to the low-voltage DC connector to output the low-voltage direct current to the vehicle-mounted low-voltage system powered by.

According to an aspect of the embodiments herein, the low-voltage DC connector includes a low-voltage DC positive connector and a low-voltage DC negative connector.

According to an aspect of the embodiments herein, an AC connector is further provided on the vehicle-mounted power distribution box, and a vehicle-mounted charging device is provided inside the vehicle-mounted power distribution box, and the vehicle-mounted charging device is connected to the AC connector for obtaining high voltage alternating current.

According to an aspect of the embodiments herein, the on-board charging device is configured to output high-voltage direct current according to the obtained high-voltage alternating current to supply power to the power battery.

According to an aspect of the embodiments herein, the inverter circuit can further invert the low-voltage direct current to output high-voltage alternating current.

According to an aspect of the embodiments herein, the vehicle-mounted power distribution box has a ground pin and is grounded, and the charging panel includes a ground protection line, and the ground protection line is electrically connected to the ground pin and is grounded.

Embodiments herein also provide an electric vehicle using the vehicle-mounted power distribution device, at least including the vehicle-mounted power distribution device described in any one of the foregoing embodiments.

Using the embodiment of this article, when the car battery is feeding power, the vehicle low-voltage system can be charged through the socket outputting high-voltage alternating current, and the socket can be disconnected after the vehicle low-voltage system works normally, so as to realize temporary charging of the battery feeding and improve user experience .

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments or prior art herein, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or prior art. Obviously, the accompanying drawings in the following description are only For some embodiments herein, those skilled in the art can also obtain other drawings based on these drawings without creative effort.

Figure 1 shows a schematic structural view of a vehicle-mounted power distribution device according to an embodiment of this paper;

Figure 2 shows an electrical connection diagram between a vehicle-mounted power distribution box and a vehicle-mounted low-voltage system according to the embodiment of this paper;

FIG. 3 is a schematic diagram of an enlarged structure of an inverter circuit according to an embodiment of this paper;

FIG. 4 is a circuit diagram of an inverter circuit according to the embodiment of the present invention.

Explanation of reference symbols:

101. Vehicle power distribution box; 102. Charging panel; 103. Inverter circuit; 104. High-voltage connector; 105. Low-voltage connector; 106. Connecting harness; 107. High-voltage wiring connector; 108. Control line connector ; 109, low-voltage DC positive connector; 110, low-voltage DC negative connector; 111, AC connector; 112, DC connector; 201, automotive wiring harness; 202, one end of the first automotive wiring harness; 203, second automotive wiring harness One end; 204, the other end of the first automotive wiring harness; 205, the other end of the second automotive wiring harness; 206, vehicle low-voltage system; 207, fuse; 208, B+ port; 410, the first filter circuit; 411, capacitor; 412, Common mode inductor; 420, rectifier circuit; 430, drive circuit; 431, drive chip; 432, MOS drive tube; 440, transformer circuit; 441, primary coil; 442, secondary coil; 450, second filter circuit; 451 , the first capacitance; 452, the second capacitance; 453, the inductance.

Detailed ways

In order to enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this paper will be clearly and completely described below in conjunction with the drawings in the embodiments of this paper. Obviously, the described implementation Examples are only some of the embodiments herein, not all of them. Based on the embodiments herein, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts fall within the scope of protection herein.

It should be noted that the terms "first" and "second" in the description and claims herein and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific order or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances such that the embodiments herein described herein can be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having", as well as any variations thereof, are intended to cover a non-exclusive inclusion, for example, a process, method, means, product or equipment comprising a series of steps or elements need not be limited to the expressly listed instead, may include other steps or elements not explicitly listed or inherent to the process, method, product or apparatus.

The embodiment of this specification provides a structural schematic diagram of a vehicle-mounted power distribution device. As shown in Figure 1, the vehicle-mounted power distribution device includes: a vehicle-mounted power distribution box 101, a charging panel 102, an inverter circuit 103, a high-voltage connector 104, and a low-voltage connector 105 , connection harness 106 , high voltage wiring connector 107 , control wire connector 108 , low voltage DC positive connector 109 , low voltage DC negative connector 110 , AC connector 111 , and DC connector 112 .

The vehicle-mounted power distribution box 101 is provided with an inverter circuit 103, and the external side of the vehicle-mounted power distribution box 101 is provided with a high-voltage connector 104, a low-voltage connector 105, a low-voltage DC positive connector 109, a low-voltage DC negative connector 110, and an AC connector. 111. A DC connector 112. The charging panel 102 is provided with a high-voltage wiring connector 107 and a control wire connector 108. Further, the on-vehicle power distribution device also includes: a socket and a charging connection line. In some embodiments of the present description, the outlet outputs 220 volts AC to the charging panel 102 . Wherein, the charging panel 102 obtains high-voltage alternating current from a socket. Further, the vehicle-mounted power distribution box 101 is connected to the high-voltage wiring connector 107 on the charging panel 102 through the high-voltage connector 104, and the inverter circuit 103 in the vehicle-mounted power distribution box 101 can thus obtain the high-voltage alternating current obtained by the charging panel 102, as Input to the inverter circuit. The vehicle-mounted power distribution box 101 is connected to the control line connector 108 on the charging panel 102 through the low-voltage connector 105, wherein, the switch trigger circuit of the inverter circuit can be integrated on the charging panel 102, that is, the switch trigger circuit on the charging panel 102 A control switch is provided, and the control switch is connected to the drive circuit 430 in the inverter circuit through the control line connector 108, the connection harness 106 and the low-voltage connector 105. After the control switch is closed, one end of the drive circuit 430 is connected to the high-voltage ground wire , the driving circuit 430 forms a loop and can work, so as to enable the MOS driving transistor in the driving circuit. Wherein, the charging panel 102 controls the switching on or off of the driving circuit by controlling the switch trigger circuit, so as to realize whether to use the inverter circuit, and realize the processing of converting high-voltage direct current into low-voltage direct current.

The on-vehicle power distribution box 101 is provided with an inverter circuit 103 for converting the high-voltage alternating current obtained by the charging panel 102 from the socket into low-voltage direct current, and the low-voltage direct current is used to supply power to the on-vehicle low-voltage system. Wherein, the socket is a civil socket, and the socket outputs 220-volt alternating current to the charging panel. The on-vehicle power distribution box 101 has a ground pin and is grounded. The charging panel 102 includes a ground protection wire. The ground protection wire in the charging panel is electrically connected to the ground pin in the on-vehicle power distribution box 101 and is grounded. It can realize leakage safety protection when leakage occurs during charging.

In some embodiments of this specification, specifically, the charging panel 102 can be connected to the socket through a charging connection line (not shown in the figure). The charging connection wire can be a power patch cord with male ends at both ends. The charging panel 102 is connected with the high-voltage connector 104 of the vehicle-mounted power distribution box 101 through the high-voltage wiring connector 107, and the high-voltage alternating current that the charging panel 102 obtains from the socket is delivered to the inside of the vehicle-mounted power distribution box 101; The connector 108 is connected to the low-voltage connector 105 of the vehicle-mounted power distribution box 101 , and the other end of the low-voltage connector 105 is connected to the driving circuit 430 in the vehicle-mounted power distribution box 101 . Specifically, the control line connector 108 on the charging panel 102 is connected to the low-voltage connector 105 of the vehicle-mounted power distribution box 101, and the low-voltage connector is connected to the MOS (Metal Oxide Semiconductor Field Effect Transistor) tube inside the drive circuit 430 (Fig. 1 (not shown) connection, used to control the connection and disconnection of the MOS tube, and further control the connection and disconnection of the inverter circuit.

In some embodiments of this specification, the charging panel 102 is installed at a suitable position in the cockpit of the car, and a plastic shell can be provided outside the charging panel 102 to protect the charging panel 102 . When the electric vehicle is parked for a long time and the low-voltage battery is fed, use the charging cable to connect the socket to the charging panel 102, so that the charging panel can obtain a voltage of 220 volts, and the charging panel will connect the 220 volts to the high-voltage connection on the vehicle-mounted power distribution box 101. The inverter 104 and the low-voltage connector 105 are input to the inverter circuit 103 in the vehicle-mounted power distribution box 101. The inverter circuit inverts the input high-voltage alternating current into low-voltage direct current, and uses the low-voltage direct current to supply low-voltage electrical appliances in the power distribution device. , so that the on-board low-voltage system of the electric vehicle can work normally.

In some embodiments of this specification, an AC connector 111 is provided on the outside of the vehicle-mounted power distribution box 101, and one end of the AC connector 111 of an on-board charging device (OBC, On board charger) is provided on the inside of the vehicle-mounted power distribution box for connecting to the vehicle-mounted power distribution box. The other end of the AC connector 111 is used to connect the on-board charging device inside the on-board power distribution box 101 to the charging gun or charging pile outside the power distribution device. The AC connector 111 obtains the high-voltage AC power output by the charging gun or the charging pile, and transmits it to the OBC. The OBC outputs high-voltage DC power for powering the power battery and DC/DC, and the DC/DC outputs low-voltage DC power.

In other embodiments of this specification, a DC connector 112 is provided on the outside of the vehicle-mounted power distribution box 101, and one end of the DC connector 112 is used to connect to a DC charging gun or a DC charging pile outside the vehicle-mounted power distribution device. The other end of the connector 112 is used to connect the power battery inside the vehicle power distribution box 101, and the DC connector 112 can directly receive the DC output from the charging gun or the charging pile to charge the power battery.

FIG. 2 is an electrical connection diagram between a vehicle-mounted power distribution box and a vehicle-mounted low-voltage system according to the embodiment of this paper.

The vehicle-mounted power distribution box 101 is electrically connected to the vehicle-mounted low-voltage system through a low-voltage DC positive connector 109 and a low-voltage DC negative connector 110 . Specifically, the vehicle-mounted power distribution box 101 is connected to the vehicle-mounted low-voltage system 206 through the vehicle wiring harness 201 . Wherein, for the sake of distinction, the automobile wiring harness 201 is divided into a first automobile wiring harness and a second automobile wiring harness. The low-voltage DC positive connector 109 is connected through one end 202 of the first vehicle wiring harness, and the other end 204 of the first vehicle wiring harness is connected to the B+ port 208 of the vehicle low-voltage system 206 . The low-voltage DC negative connector 110 is connected through one end 203 of the second automobile wiring harness, and the other end 205 of the second automobile wiring harness is grounded through the grounding device in the vehicle body to realize charging protection. The on-vehicle power distribution box 101 inverts and outputs the low-voltage direct current through the inverter circuit 103, and transmits it to the on-vehicle low-voltage system 206 through the automobile wiring harness 201, charges the low-voltage electrical appliances in the on-vehicle low-voltage system 206, and performs low-voltage connection with the fuse 207 to further realize electric The normal work of the car's low-voltage system.

FIG. 3 is a schematic diagram of an enlarged structure of an inverter circuit according to the embodiment of this paper.

In some embodiments of this specification, the inverter circuit 103 converts the high-voltage alternating current obtained by the charging panel into low-voltage direct current. Specifically, the inverter circuit 103 performs inverter processing on the AC power obtained by the charging panel from the socket through a filter module, a rectifier module, a drive module, a transformer module, and a photoelectric cell, and outputs low-voltage direct current. Wherein, the filter module includes a filter coil, and performs filter processing on the input alternating current and the low-voltage direct current before output from the inverter circuit in the inverter circuit, and filters out harmonics in the rectified voltage. The rectification module is connected with the filter module, and performs full-wave rectification on the filtered AC signal. The rectification module is a bridge rectification circuit. The rectification module includes a bridge rectification circuit composed of multiple diodes. Through the unidirectional conduction characteristics of the diodes, the alternating current whose level fluctuates around zero is converted into unidirectional direct current. The drive module includes a drive chip and a MOS drive tube. The transformer module includes a primary coil and a secondary coil. The inverter circuit also includes a photoelectric tube, which is a light-emitting diode, and when a current passes through the photoelectric tube, the photoelectric tube emits light.

Wherein, the filter module is connected to the metal pin in the high-voltage connector 104 provided on the vehicle power distribution box 101, and obtains the high-voltage alternating current transmitted from the charging panel 102 to the vehicle power distribution box 101 as the input of the entire inverter circuit. The filtering module is connected with the rectifying module to obtain full-wave rectified power. The rectifier module is connected to the drive module, and the drive IC chip is powered on, so that the MOS drive tube in the drive module is continuously turned on and off. The drive module is connected with the transformer module, so that the magnetic flux in the transformer module changes constantly, and outputs low-voltage electricity. The transformer module is used for step-down, and the high level is reduced to low level through the change of the magnetic flux in the primary coil and the secondary coil. The low-voltage power output by the transformer module passes through the filter module to obtain a stable direct current. The output module includes output electrodes for outputting low-voltage direct current. The output electrode in the input module is connected to the low-voltage DC connector provided outside the vehicle-mounted power distribution box 101, and outputs 12 volts of low-voltage direct current, supplies power to the vehicle-mounted low-voltage system, and is connected to the fuse in the low-voltage fuse box at low voltage.

FIG. 4 is a circuit diagram of an inverter circuit according to the embodiment of the present invention. The charging panel 102 obtains three-phase AC power from a household socket through a charging connection line. The charging panel is connected to the inverter circuit in the vehicle power distribution box through a high-voltage connector, and the high-voltage alternating current is input into the inverter circuit; the charging panel is connected to the inverter circuit in the vehicle power distribution box through a low-voltage connector, and the inverter circuit The driving chip in the drive circuit supplies the low-voltage signal and the enabling signal to make the driving chip of the driving circuit work. The inverter circuit finally outputs low-voltage direct current. For example, AC power with a voltage range of 198 volts to 235 volts and a frequency of 50 Hz is input into the inverter circuit, and the voltage of the high-voltage AC power is reduced through step-down processing of the transformer coil. The transformed voltage is input to the bridge rectification circuit (corresponding to the rectification module in the inverter circuit 103 described in FIG. 2 ). The function of the rectifier circuit is to convert the AC voltage into a unidirectional pulsating DC voltage.

After the current is processed by bridge rectification, it passes through a filter circuit composed of electrical components to filter out unstable components in the current, and then passes through a transformer module to further stabilize the voltage to the required low voltage. Wherein, the voltage transformation module includes a transformer and/or a transformation coil, and its function is to realize the matching between the AC input voltage and the DC output voltage and the electrical isolation between the AC grid and the rectification circuit. Finally, the low-voltage direct current is output through the output module.

The embodiment of this document provides a circuit schematic diagram of an inverter circuit as shown in FIG. 4 , and provides parameters and optimal connection modes of electronic components related to the inverter circuit. In the schematic diagram of the circuit, there are a first filter circuit 410 , a rectifier circuit 420 , a drive circuit 430 , a transformer circuit 440 , and a second filter circuit 450 .

The first filter circuit 410 is connected to the input pin of the inverter circuit 103 , and the first filter circuit 410 includes a capacitor 411 and a common mode inductor 412 . The capacitor 411 is connected in parallel with the common-mode inductor 412, and the common-mode inductor 412 is connected to the rectifier circuit 420, and the filtered alternating current is input to the rectifier circuit 420 for rectification.

In some embodiments of the present specification, the rectification circuit 420 is composed of four diodes D1 , D2 , D3 , D4 connected in pairs, and uses the unidirectional conduction characteristic of the diodes to perform rectification. Among them, diode D1 is connected in series with D2, D3 is connected in series with D4, the negative pole of D2 is connected with the negative pole of D4, the positive pole of D1 is connected with D3, and the alternating current is input to the place where D1 and D2 are connected and the place where D3 and D4 are connected, then D2 and D4 The place where the negative poles are connected outputs positive electricity, and the place where the positive poles of D1 and D3 are connected outputs negative electricity. When the input alternating current is a standard sine wave, the two diodes D2 and D3 in the bridge rectifier circuit are turned on, and the output obtains the positive half current of the alternating current sine wave; the other two diodes D1 and D4 are reversely connected, and the output obtains the alternating current sine wave Current in the positive half of the wave. Therefore, the rectifier module converts the alternating current into direct current. When two diodes are on and the other two are off, the four diodes connected in series can withstand the peak forward voltage. In addition, the output pin of the rectification circuit 420 is connected to the drive circuit 430 . As mentioned above, the driving circuit 430 includes a driving chip 431 and a MOS driving transistor 432 . Wherein, the MOS driving transistor is a field effect transistor. The drain of the MOS driving transistor 432 is connected to the clamping resistor 433 , the gate of the MOS driving transistor 432 is connected to the driving pin of the driving chip 431 , and the source of the MOS driving transistor 432 is connected to the analog ground. The gate of the MOS driving transistor 432 is connected to the driving pin of the driving chip 431 , the voltage on the drain and the source of the MOS driving transistor 432 is relatively high, and the voltage carried by the gate is relatively low. For example, the maximum withstand voltage of the drain and the source is 600 volts, and the driving voltage of the gate is about 10 volts, so that the MOS driving transistor 432 can work normally. It should be noted that the model of the MOS driving transistor 432 in this embodiment is MDF4N60, the resistance of the clamping resistor is 100 ohms, and the gate of the MOS driving transistor 432 is connected to the driving pin of the driving IC chip. According to the signal sent by the drive pin, pulse voltages with different duty ratios can be output to further control the on and off states of the MOS tube. Among them, the duty cycle and output frequency of the pulse voltage are determined by the IC chip program. In this specification, the model of the MOS drive transistor 432 is not limited, and other arbitrary models of field effect transistors suitable for the drive circuit 430 of the present application can be used to implement specific embodiments of the present application.

The drain of the MOS drive tube 432 in the drive circuit 430 is connected to the primary coil in the transformer circuit 440, the voltage at both ends of the primary coil is the voltage at both ends of the primary coil 441 and the secondary coil 442, and the high frequency disconnection of the MOS drive tube 432 Action, the primary coil generates an induced electromotive force, which generates magnetic flux in the transformer circuit 440, so the secondary coil 442 generates an induced electromotive force, and a pulsating DC low voltage is generated on the secondary coil.

The DC low voltage generated by the secondary coil 442 is processed by the second filter circuit 450 to convert the pulsating DC low voltage into a smooth DC low voltage.

It should be noted that the second filter circuit 450 herein is a π-type filter circuit, that is, an LC type, wherein the function of the filter circuit is to remove unnecessary harmonics, reduce the current ripple in the DC power supply, and make the current more stable. smooth. In some embodiments of the present specification, the second filter circuit includes two capacitors, wherein the first capacitor 451 is 0.1F, the second capacitor 452 is 10 μF, and the inductor 453 is 50 μH.

It should be noted that those skilled in the art can adjust the first filter circuit 410 and the second filter circuit 450 to be LC or RC type circuits according to the input and output impedance, and can obtain the corresponding filtering effect, so it should be possible to filter circuits, etc. Effectively replace the filter circuit herein, so the first filter circuit 410 and the second filter circuit 450 may not be limited herein.

On the basis of the vehicle-mounted power distribution device provided above, the embodiment of this specification provides an electric vehicle using the vehicle-mounted power distribution device, and the electric vehicle is provided with the above-mentioned vehicle-mounted power distribution device.

The beneficial effects obtained by providing the above-mentioned electric vehicle are consistent with the above-mentioned beneficial effects obtained by the vehicle-mounted power distribution device, and are not limited by the embodiments of this specification.

It should be understood that in the various embodiments herein, the sequence numbers of the above-mentioned processes do not mean the sequence of execution, and the execution order of the processes should be determined by their functions and internal logic, and should not be used in the implementation of the embodiments herein. process constitutes any qualification.

It should also be understood that in the embodiments herein, the term "and/or" is merely an association relationship describing associated objects, indicating that there may be three relationships. For example, A and/or B may mean that A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" in this article generally indicates that the contextual objects are an "or" relationship.

Those of ordinary skill in the art can realize that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the relationship between hardware and software Interchangeability. In the above description, the composition and steps of each example have been generally described according to their functions. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. A skilled artisan may implement the described functionality using different methods for each particular application, but such implementation should not be considered beyond the scope of this document.

Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiment, and details are not repeated here.

In the several embodiments provided herein, it should be understood that the disclosed systems, devices and methods may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be indirect coupling or communication connection through some interfaces, devices or units, and may also be electrical, mechanical or other forms of connection.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solutions in the embodiments herein.

In addition, each functional unit in each of the embodiments herein may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

If the integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution in this article is essentially or part of the contribution to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , including several instructions to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments herein. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disc, etc., which can store program codes. .

In this paper, specific examples have been used to illustrate the principles and implementation methods of this paper. The description of the above embodiments is only used to help understand the method and core ideas of this paper; meanwhile, for those of ordinary skill in the art, according to the ideas of this paper , there will be changes in specific implementation methods and application ranges. In summary, the contents of this specification should not be construed as limiting this text.

Claims

A vehicle-mounted power distribution device, characterized in that it includes: the vehicle-mounted power distribution device includes a vehicle-mounted power distribution box, and a charging panel installed near the vehicle-mounted power distribution box;

The vehicle-mounted power distribution box is provided with a high-voltage connector;

The charging panel is provided with a high-voltage wiring connector;

The high-voltage connector of the vehicle-mounted power distribution box is connected to the high-voltage wiring connector of the charging panel;

The vehicle-mounted power distribution box is provided with an inverter circuit for converting the high-voltage alternating current of the charging panel into low-voltage direct current, and the low-voltage direct current is used to supply power to the vehicle-mounted low-voltage system.
The on-vehicle power distribution device according to claim 1, wherein the inverter circuit includes a drive module, a filter module, a rectifier module, a transformer module, and an output module, which are used to control the high-voltage alternating current of the charging panel. Perform inversion processing to output the low-voltage direct current.
The vehicle-mounted power distribution device according to claim 2, wherein the filter module includes a filter coil for filtering out unstable components in the high-voltage alternating current; the transformer module includes a transformer for converting the The high-voltage component in the high-voltage alternating current is subjected to step-down processing; the rectification module includes a bridge rectification circuit composed of a plurality of diodes;

The output module includes output electrodes for outputting the low-voltage direct current.
The vehicle-mounted power distribution device according to claim 3, wherein a low-voltage DC connector is provided outside the vehicle-mounted power distribution box, and the output electrodes in the output module are connected to the low-voltage DC connector to output the low-voltage DC connector. The direct current supplies power to the vehicle low-voltage system.
The vehicle-mounted power distribution device according to claim 4, wherein the low-voltage DC connector includes a low-voltage DC positive connector and a low-voltage DC negative connector.
The vehicle-mounted power distribution device according to claim 1, wherein an AC connector is further provided outside the vehicle-mounted power distribution box, and a vehicle-mounted charging device is provided inside the vehicle-mounted power distribution box, and the vehicle-mounted charging device is connected to the AC Connector connection for high voltage AC power.
The vehicle-mounted power distribution device according to claim 6, wherein the vehicle-mounted charging device is configured to output high-voltage direct current according to the obtained high-voltage alternating current to supply power to the power battery.
The vehicle-mounted power distribution device according to claim 1, wherein the inverter circuit can further invert the low-voltage direct current to output high-voltage alternating current.
The vehicle-mounted power distribution device according to claim 1, wherein the vehicle-mounted power distribution box has a grounding pin and is grounded, and the charging panel includes a grounding protection line, and the grounding protection line is connected to the grounding pin Electrically connected and grounded.
An electric vehicle, characterized in that the electric vehicle at least comprises the vehicle-mounted power distribution device according to any one of claims 1-9.