Electric vehicle power line communication system and electric vehicle system

Abstract

The present invention relates to the field of electric vehicle communication technology, and specifically discloses an electric vehicle power line communication system, which includes: a battery signal synthesis and separation circuit, a central control signal synthesis and separation circuit, and a controller signal synthesis and separation circuit. The central control signal synthesis and separation circuit and the controller signal synthesis and separation circuit are both electrically connected to the battery signal synthesis and separation circuit through a power bus. The battery signal synthesis and separation circuit is arranged on the battery unit, the central control signal synthesis and separation circuit is arranged on the central control unit, and the controller signal synthesis and separation circuit is arranged on the controller unit. The present invention also discloses an electric vehicle system. The electric vehicle power line communication system provided by the present invention simplifies the electric vehicle assembly line system and saves costs at the same time.

Description

Technical Field

[0001] The present invention relates to the technical field of electric vehicle communication, and in particular to an electric vehicle power line communication system and an electric vehicle system including the electric vehicle power line communication system. Background Art

[0002] With the development of intelligence, more and more intelligence is used in electric vehicles. The electrical units of smart electric vehicles transmit information to each other through bus communication, which requires the establishment of a communication network between the electrical units inside the smart electric vehicle. The market basically uses wired network communication to form a network, which makes the assembly line system of smart electric vehicles more complicated and the cost is relatively high. Summary of the invention

[0003] The present invention provides an electric vehicle power line communication system and an electric vehicle system including the electric vehicle power line communication system, which solves the problem of complex and high cost of electric vehicle assembly line systems existing in the related art.

[0004] As a first aspect of the present invention, there is provided an electric vehicle power line communication system, which includes: a battery signal synthesis and separation circuit, a central control signal synthesis and separation circuit, and a controller signal synthesis and separation circuit, wherein the central control signal synthesis and separation circuit and the controller signal synthesis and separation circuit are both electrically connected to the battery signal synthesis and separation circuit through a power bus, the battery signal synthesis and separation circuit is arranged on a battery unit, the central control signal synthesis and separation circuit is arranged on a central control unit, and the controller signal synthesis and separation circuit is arranged on a controller unit.

[0005] The battery signal synthesis and separation circuit can transmit the power voltage and communication modulation signal output by the battery unit to the central control signal synthesis and separation circuit and the controller signal synthesis and separation circuit respectively through the power bus.

[0006] Furthermore, it also includes: a converter signal synthesis and separation circuit, which is arranged on the converter unit, and the converter signal synthesis and separation circuit is electrically connected to the battery signal synthesis and separation circuit through an electric door lock bus, wherein the electric door lock bus is connected to the power bus through an electric door lock control unit.

[0007] Furthermore, it also includes: an instrument signal synthesis and separation circuit, which is arranged on the instrument display unit, and the instrument signal synthesis and separation circuit is electrically connected to the battery signal synthesis and separation circuit through the electric door lock bus.

[0008] Furthermore, the converter signal synthesis and separation circuit and the instrument signal synthesis and separation circuit both include:

[0009] a first inductor and a first capacitor, one end of the first inductor is connected to the electric door lock bus, the other end of the first inductor is an output end, one end of the first capacitor is connected to the other end of the first inductor, and the other end of the first capacitor is connected to a communication modulation signal,

[0010] The first inductor is used to isolate the communication modulation signal on the electric door lock bus from the high voltage DC voltage in the electric door lock control unit;

[0011] The first capacitor is used to modulate the communication modulation signal onto the electric door lock voltage in the electric door lock unit.

[0012] Furthermore, it also includes an immobilizer signal synthesis and separation circuit, which is arranged on the immobilizer unit, and is electrically connected to the controller signal synthesis and separation circuit, and the immobilizer signal synthesis and separation circuit is also electrically connected to the battery signal synthesis and separation circuit through the power bus.

[0013] Furthermore, the anti-theft device signal synthesis and separation circuit and the central control signal synthesis and separation circuit both include:

[0014] a second inductor and a second capacitor, one end of the second inductor is connected to the power bus, the other end of the second inductor is an output end, one end of the second capacitor is connected to the other end of the second inductor, and the other end of the second capacitor is connected to a communication modulation signal;

[0015] The second inductor is used to isolate the communication modulation signal on the power bus from the high-voltage DC voltage on the power bus;

[0016] The second capacitor is used to modulate the communication modulation signal onto the power voltage on the power bus.

[0017] Furthermore, the controller signal synthesis and separation circuit includes:

[0018] A third inductor, a fourth inductor and a third capacitor, one end of the third inductor is connected to the electric door lock bus, the other end of the third inductor is an output end, one end of the third capacitor is connected to the other end of the third inductor, the other end of the third capacitor is connected to the communication modulation signal, one end of the fourth inductor is connected to the power bus, and the other end of the fourth inductor is an output end;

[0019] The third inductor is used to isolate the communication modulation signal on the electric door lock bus from the high voltage DC voltage in the electric door lock control unit;

[0020] The fourth inductor is used to isolate the communication modulation signal on the power bus from the high-voltage DC voltage on the power bus;

[0021] The third capacitor is used to modulate the communication modulation signal onto the electric door lock voltage in the electric door lock unit.

[0022] Furthermore, the battery signal synthesis and separation circuit includes:

[0023] a fifth inductor and a fourth capacitor, wherein one end of the fifth inductor is connected to the battery power voltage output end, the other end of the fifth inductor is the output end, one end of the fourth capacitor is connected to the other end of the fifth inductor, and the other end of the fourth capacitor is connected to the communication modulation signal;

[0024] The fifth inductor is used to isolate the communication modulation signal on the power bus from the high-voltage DC voltage on the power bus;

[0025] The fourth capacitor is used to modulate the communication modulation signal onto the power voltage on the power bus.

[0026] As another aspect of the present invention, an electric vehicle system is provided, comprising: a battery unit, a central control unit, a controller unit and the electric vehicle power line communication system as described above, wherein the central control unit and the controller unit are both electrically connected to the battery unit through the power bus, the battery signal synthesis and separation circuit in the electric vehicle power communication system is arranged on the battery unit, the central control signal synthesis and separation circuit in the electric vehicle power communication system is arranged on the central control unit, and the controller signal synthesis and separation circuit in the electric vehicle power line communication system is arranged on the controller unit;

[0027] The electric vehicle power line communication system can realize communication signal transmission and power signal transmission between the battery unit, the central control unit and the controller unit.

[0028] Furthermore, it also includes: an electric door lock control unit, an anti-theft unit, a converter unit and an instrument display unit, the anti-theft unit is electrically connected to the controller unit, the anti-theft unit is connected to the battery unit through the power bus, the converter unit and the instrument display unit are connected to the electric door lock control unit through the electric door lock bus, the electric door lock control unit is electrically connected to the battery unit, the controller unit and the power bus respectively, when the electric vehicle power line communication system also includes a converter signal synthesis and separation circuit, an instrument signal synthesis and separation circuit and an anti-theft signal synthesis and separation circuit, the converter signal synthesis and separation circuit is arranged on the converter unit, the instrument signal synthesis and separation circuit is arranged on the instrument display unit, and the anti-theft signal synthesis and separation circuit is arranged on the anti-theft unit.

[0029] The electric vehicle power line communication system provided by the present invention realizes communication and power signal transmission between the battery unit and the central control unit and the controller unit by respectively setting a battery signal synthesis and separation circuit on the battery unit, setting a central control signal synthesis and separation circuit on the central control unit, and setting a controller signal synthesis and separation circuit on the controller unit. This can eliminate the wired communication network required for the original communication between the electrical units of the electric vehicle, greatly simplify the electric vehicle assembly line system, and save the cost of the assembly line system. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention, but do not constitute a limitation of the present invention.

[0031] Figure 1 This is a structural block diagram of the electric vehicle power line communication system provided by the present invention.

[0032] Figure 2 This is a schematic structural diagram of a specific implementation of the electric vehicle power line communication system provided by the present invention.

[0033] Figure 3 The present invention provides a schematic diagram of the circuit structure of the converter signal synthesis and separation circuit and the instrument signal synthesis and separation circuit.

[0034] Figure 4 The present invention provides a circuit diagram of the signal synthesis and separation circuit for the anti-theft device.

[0035] Figure 5 A schematic diagram of the circuit structure of the controller signal synthesis and separation circuit provided by the present invention.

[0036] Figure 6 This is a schematic diagram of the circuit structure of the battery signal synthesis and separation circuit provided by the present invention. DETAILED DESCRIPTION

[0037] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0038] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiment of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work should fall within the scope of protection of the present invention.

[0039] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so as to describe the embodiments of the present invention described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0040] In this embodiment, a power line communication system for an electric vehicle is provided. Figure 1 is a structural block diagram of an electric vehicle power line communication system 100 according to an embodiment of the present invention. Figure 1 As shown, it includes: a battery signal synthesis and separation circuit 110, a central control signal synthesis and separation circuit 120 and a controller signal synthesis and separation circuit 130, the central control signal synthesis and separation circuit 120 and the controller signal synthesis and separation circuit 130 are both electrically connected to the battery signal synthesis and separation circuit 110 through a power bus 140, the battery signal synthesis and separation circuit 110 is arranged on the battery unit 200, the central control signal synthesis and separation circuit 120 is arranged on the central control unit 300, and the controller signal synthesis and separation circuit 130 is arranged on the controller unit 400,

[0041] The battery signal synthesis and separation circuit 110 can transmit the power voltage and communication modulation signal output by the battery unit to the central control signal synthesis and separation circuit 120 and the controller signal synthesis and separation circuit 130 respectively through the power bus 140.

[0042] The electric vehicle power line communication system provided by the embodiment of the present invention realizes communication and power signal transmission between the battery unit and the central control unit and the controller unit by respectively setting a battery signal synthesis and separation circuit on the battery unit, setting a central control signal synthesis and separation circuit on the central control unit, and setting a controller signal synthesis and separation circuit on the controller unit. This can eliminate the wired communication network required for the original communication between the electrical units of the electric vehicle, greatly simplifying the electric vehicle assembly line system and saving the cost of the assembly line system.

[0043] It should be noted that the controller unit 400 is used to control the motor, speed regulation and braking of the electric vehicle.

[0044] Specifically, Figure 2As shown, the electric vehicle power line communication system also includes: a converter signal synthesis and separation circuit 150, which is arranged on the converter unit 500, and the converter signal synthesis and separation circuit 150 is electrically connected to the battery signal synthesis and separation circuit 110 through an electric door lock bus 160, wherein the electric door lock bus 160 is connected to the power bus 140 through an electric door lock control unit 600.

[0045] It should be understood that the converter unit 500 is connected to the battery unit 200 through the electric door lock control unit 600, and the output end of the converter unit 500 is connected to the light control unit to achieve light control of the electric vehicle.

[0046] Specifically, Figure 2 As shown, the electric vehicle power line communication system also includes: an instrument signal synthesis and separation circuit 170, which is arranged on the instrument display unit 700, and the instrument signal synthesis and separation circuit 170 is electrically connected to the battery signal synthesis and separation circuit 110 through the electric door lock bus 160.

[0047] It should be understood that the instrument display unit 700 is connected to the battery unit through the electric door lock control unit to control the instrument display of the electric vehicle.

[0048] Specifically, Figure 3 As shown, the converter signal synthesis and separation circuit 150 and the instrument signal synthesis and separation circuit 170 both include:

[0049] A first inductor L5 and a first capacitor C4, one end of the first inductor L5 is connected to the electric door lock bus 160, the other end of the first inductor L5 is an output end, one end of the first capacitor C4 is connected to the other end of the first inductor L5, and the other end of the first capacitor C4 is connected to the communication modulation signal,

[0050] The first inductor L5 is used to isolate the communication modulation signal on the electric door lock bus 160 from the high voltage DC voltage in the electric door lock control unit 600;

[0051] The first capacitor C4 is used to modulate the communication modulation signal onto the electric door lock voltage in the electric door lock unit 600 .

[0052] Specifically, Figure 2As shown, the electric vehicle power line communication system also includes an anti-theft device signal synthesis and separation circuit 180, and the anti-theft device signal synthesis and separation circuit 180 is arranged on the anti-theft device unit 800, and the anti-theft device signal synthesis and separation circuit 180 is electrically connected to the controller signal synthesis and separation circuit 130, and the anti-theft device signal synthesis and separation circuit 180 is also electrically connected to the battery signal synthesis and separation circuit 110 through the power bus 140.

[0053] More specifically, if Figure 4 As shown, the anti-theft device signal synthesis and separation circuit 180 and the central control signal synthesis and separation circuit 120 both include:

[0054] A second inductor L2 and a second capacitor C2, one end of the second inductor L2 is connected to the power bus 140, the other end of the second inductor L2 is an output end, one end of the second capacitor C2 is connected to the other end of the second inductor L2, and the other end of the second capacitor C2 is connected to a communication modulation signal;

[0055] The second inductor L2 is used to isolate the communication modulation signal on the power bus 140 from the high-voltage DC voltage on the power bus;

[0056] The second capacitor C2 is used to modulate the communication modulation signal onto the power voltage on the power bus 140 .

[0057] Specifically, Figure 5 As shown, the controller signal synthesis and separation circuit 130 includes: a third inductor L3, a fourth inductor L4 and a third capacitor C3, one end of the third inductor L3 is connected to the electric door lock bus 160, the other end of the third inductor L3 is an output end, one end of the third capacitor C3 is connected to the other end of the third inductor L3, the other end of the third capacitor C3 is connected to the communication modulation signal, one end of the fourth inductor L4 is connected to the power bus 140, and the other end of the fourth inductor L4 is an output end;

[0058] The third inductor L3 is used to isolate the communication modulation signal on the electric door lock bus from the high voltage DC voltage in the electric door lock control unit;

[0059] The fourth inductor L4 is used to isolate the communication modulation signal on the power bus from the high-voltage DC voltage on the power bus;

[0060] The third capacitor C3 is used to modulate the communication modulation signal onto the electric door lock voltage in the electric door lock unit.

[0061] Specifically, Figure 6 As shown, the battery signal synthesis and separation circuit 110 includes:

[0062] A fifth inductor L1 and a fourth capacitor C1, one end of the fifth inductor L1 is connected to the battery power voltage output end, the other end of the fifth inductor L1 is the output end, one end of the fourth capacitor C1 is connected to the other end of the fifth inductor L1, and the other end of the fourth capacitor C1 is connected to the communication modulation signal;

[0063] The fifth inductor L1 is used to isolate the communication modulation signal on the power bus from the high-voltage DC voltage on the power bus;

[0064] The fourth capacitor C1 is used to modulate the communication modulation signal onto the power voltage on the power bus.

[0065] As another embodiment of the present invention, an electric vehicle system is provided, wherein: Figure 2 As shown, it includes: a battery unit 200, a central control unit 300, a controller unit 400 and the electric vehicle power line communication system 100 mentioned above, the central control unit 300 and the controller unit 400 are both electrically connected to the battery unit 200 through the power bus 140, the battery signal synthesis and separation circuit 110 in the electric vehicle power communication system 100 is arranged on the battery unit 200, the central control signal synthesis and separation circuit 120 in the electric vehicle power communication system 100 is arranged on the central control unit 300, and the controller signal synthesis and separation circuit 130 in the electric vehicle power line communication system 100 is arranged on the controller unit 400;

[0066] The electric vehicle power line communication system 100 can realize communication signal transmission and power signal transmission among the battery unit 200 , the central control unit 300 and the controller unit 400 .

[0067] The electric vehicle system provided in the embodiment of the present invention adopts the electric vehicle power line communication system mentioned above. By respectively setting a battery signal synthesis and separation circuit on the battery unit, setting a central control signal synthesis and separation circuit on the central control unit, and setting a controller signal synthesis and separation circuit on the controller unit, communication and power signal transmission between the battery unit and the central control unit and the controller unit are realized. This can eliminate the wired communication network required for the original communication between the electrical units of the electric vehicle, greatly simplify the electric vehicle assembly line system, and save the cost of the assembly line system.

[0068] Specifically, Figure 2As shown, the electric vehicle system further includes: an electric door lock control unit 600, an anti-theft unit 800, a converter unit 500 and an instrument display unit 700, wherein the anti-theft unit 500 is electrically connected to the controller unit 400, the anti-theft unit 500 is connected to the battery unit 200 via the power bus 140, the converter unit 500 and the instrument display unit 700 are connected to the electric door lock control unit 600 via the electric door lock bus 160, and the electric door lock control unit 600 is respectively connected to the battery unit 200. , the controller unit 400 is electrically connected to the power bus 140. When the electric vehicle power line communication system 100 also includes a converter signal synthesis and separation circuit 150, an instrument signal synthesis and separation circuit 170 and an immobilizer signal synthesis and separation circuit 180, the converter signal synthesis and separation circuit 150 is arranged on the converter unit 500, the instrument signal synthesis and separation circuit 170 is arranged on the instrument display unit 700, and the immobilizer signal synthesis and separation circuit 180 is arranged on the immobilizer unit 500.

[0069] It should be understood that the specific structures and working principles of the battery unit, central control unit, controller unit, converter unit, electric door lock control unit, instrument display unit and anti-theft device unit are well known to those skilled in the art and will not be described in detail here.

[0070] Combine the following Figures 2 to 6 The working principle of the electric vehicle system provided by the embodiment of the present invention is described in detail.

[0071] The electric vehicle system provided by the embodiment of the present invention includes a battery unit 200 and a battery signal synthesis and separation circuit 110 arranged thereon, a controller unit 400 and a controller signal synthesis and separation circuit 130 arranged thereon, a central control unit 300 and a central control signal synthesis and separation circuit 120 arranged thereon, an anti-theft device unit 800 and an anti-theft device signal synthesis and separation circuit 180 arranged thereon, an instrument display unit 700 and an instrument signal synthesis and separation circuit 170 arranged thereon, a converter unit 500 and a converter signal synthesis and separation circuit 150 arranged thereon, a power bus 140, an electric door lock control unit 600 and an electric door lock bus 160.

[0072] Specifically, the battery unit 200 outputs the power voltage required by the entire electric vehicle and the communication modulation signal of the battery unit, which are connected to the controller unit 400, the central control unit 300, the anti-theft device unit 800, and the electric door lock control unit 600 through the battery signal synthesis and separation circuit 110 and then through the power bus 140. The power bus 140 is connected to the electric door lock bus 160 through the electric door lock control unit 600, and the electric door lock bus 160 is connected to the controller unit 400, the converter unit 500, and the instrument display unit 700. The power voltage lines and communication modulation signals in the battery unit 200, the central control unit 300, the immobilizer unit 800, the controller unit 400, the converter unit 500, the instrument display unit 700 and the electric door lock control unit 600 are connected to the power bus 140 or the electric door lock bus 160 via the corresponding battery signal synthesis and separation circuit 110, the immobilizer signal synthesis and separation circuit 180, the controller signal synthesis and separation circuit 130, the converter signal synthesis and separation circuit 150, and the instrument signal synthesis and separation circuit 170, so that the network composed of the power bus 140 and the electric door lock bus 160 is utilized to realize the communication between the units.

[0073] The inductance in the battery signal synthesis and separation circuit 110, the anti-theft signal synthesis and separation circuit 180, the controller signal synthesis and separation circuit 130, the converter signal synthesis and separation circuit 150, and the instrument signal synthesis and separation circuit 170 in the battery unit 200, the central control unit 300, the anti-theft device unit 800, the controller unit 400, the converter unit 500, the instrument display unit 700, and the electric door lock control unit 600 is used to convert the communication modulation signal on the power bus 140 or the electric door lock bus 160 and the battery unit 200, the central control unit 300, the anti-theft device unit 800, the The high-voltage DC voltage lines (connected to the power voltage output by the battery unit) in the controller unit 400, the converter unit 500, the instrument display unit 700, and the electric door lock control unit 600 are isolated. The function of the capacitor is to superimpose the communication modulation signal on the power bus 140 or the electric door lock bus 160 for transmission when the battery unit 200, the central control unit 300, the anti-theft device unit 800, the controller unit 400, the converter unit 500, the instrument display unit 700, and the electric door lock control unit 600 communicate, and to take out the communication modulation signal from the power bus 140 or the electric door lock bus 160 for reception when communication is received.

[0074] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. An electric vehicle power line communication system, characterized in that: include: A battery signal synthesis and separation circuit, a central control signal synthesis and separation circuit, and a controller signal synthesis and separation circuit, wherein the central control signal synthesis and separation circuit and the controller signal synthesis and separation circuit are electrically connected to the battery signal synthesis and separation circuit through a power bus, the battery signal synthesis and separation circuit is arranged on the battery unit, the central control signal synthesis and separation circuit is arranged on the central control unit, and the controller signal synthesis and separation circuit is arranged on the controller unit. The battery signal synthesis and separation circuit can transmit the power voltage and communication modulation signal output by the battery unit to the central control signal synthesis and separation circuit and the controller signal synthesis and separation circuit respectively through the power bus; The controller signal synthesis and separation circuit comprises: A third inductor, a fourth inductor and a third capacitor, one end of the third inductor is connected to the electric door lock bus, the other end of the third inductor is an output end, one end of the third capacitor is connected to the other end of the third inductor, the other end of the third capacitor is connected to the communication modulation signal, one end of the fourth inductor is connected to the power bus, and the other end of the fourth inductor is an output end; The third inductor is used to isolate the communication modulation signal on the electric door lock bus from the high voltage DC voltage in the electric door lock control unit; The fourth inductor is used to isolate the communication modulation signal on the power bus from the high-voltage DC voltage on the power bus; The third capacitor is used to modulate the communication modulation signal onto the electric door lock voltage in the electric door lock unit; The battery signal synthesis and separation circuit comprises: a fifth inductor and a fourth capacitor, wherein one end of the fifth inductor is connected to the battery power voltage output end, the other end of the fifth inductor is the output end, one end of the fourth capacitor is connected to the other end of the fifth inductor, and the other end of the fourth capacitor is connected to the communication modulation signal; The fifth inductor is used to isolate the communication modulation signal on the power bus from the high-voltage DC voltage on the power bus; The fourth capacitor is used to modulate the communication modulation signal onto the power voltage on the power bus.

2. The electric vehicle power line communication system according to claim 1, characterized in that: Also includes: A converter signal synthesis and separation circuit, wherein the converter signal synthesis and separation circuit is arranged on the converter unit, and the converter signal synthesis and separation circuit is electrically connected to the battery signal synthesis and separation circuit through an electric door lock bus, wherein the electric door lock bus is connected to the power bus through an electric door lock control unit.

3. The electric vehicle power line communication system according to claim 2, characterized in that: Also includes: An instrument signal synthesis and separation circuit is provided on the instrument display unit, and the instrument signal synthesis and separation circuit is electrically connected to the battery signal synthesis and separation circuit through the electric door lock bus.

4. The electric vehicle power line communication system according to claim 3, characterized in that: The converter signal synthesis and separation circuit and the instrument signal synthesis and separation circuit both include: a first inductor and a first capacitor, one end of the first inductor is connected to the electric door lock bus, the other end of the first inductor is an output end, one end of the first capacitor is connected to the other end of the first inductor, and the other end of the first capacitor is connected to a communication modulation signal, The first inductor is used to isolate the communication modulation signal on the electric door lock bus from the high voltage DC voltage in the electric door lock control unit; The first capacitor is used to modulate the communication modulation signal onto the electric door lock voltage in the electric door lock unit.

5. The electric vehicle power line communication system according to any one of claims 1 to 4, characterized in that: It also includes an anti-theft device signal synthesis and separation circuit, which is arranged on the anti-theft device unit, and is electrically connected to the controller signal synthesis and separation circuit. The anti-theft device signal synthesis and separation circuit is also electrically connected to the battery signal synthesis and separation circuit through the power bus.

6. The electric vehicle power line communication system according to claim 5, characterized in that: The anti-theft device signal synthesis and separation circuit and the central control signal synthesis and separation circuit both include: a second inductor and a second capacitor, one end of the second inductor is connected to the power bus, the other end of the second inductor is an output end, one end of the second capacitor is connected to the other end of the second inductor, and the other end of the second capacitor is connected to a communication modulation signal; The second inductor is used to isolate the communication modulation signal on the power bus from the high-voltage DC voltage on the power bus; The second capacitor is used to modulate the communication modulation signal onto the power voltage on the power bus.

7. An electric vehicle system, characterized in that: include: A battery unit, a central control unit, a controller unit and an electric vehicle power line communication system as described in any one of claims 1 to 6, wherein the central control unit and the controller unit are both electrically connected to the battery unit through the power bus, the battery signal synthesis and separation circuit in the electric vehicle power line communication system is arranged on the battery unit, the central control signal synthesis and separation circuit in the electric vehicle power line communication system is arranged on the central control unit, and the controller signal synthesis and separation circuit in the electric vehicle power line communication system is arranged on the controller unit; The electric vehicle power line communication system can realize communication signal transmission and power signal transmission between the battery unit, the central control unit and the controller unit.

8. The electric vehicle system according to claim 7, characterized in that: Also includes: An electric door lock control unit, an anti-theft device unit, a converter unit and an instrument display unit, wherein the anti-theft device unit is electrically connected to the controller unit, the anti-theft device unit is connected to the battery unit via the power bus, the converter unit and the instrument display unit are connected to the electric door lock control unit via the electric door lock bus, and the electric door lock control unit is electrically connected to the battery unit, the controller unit and the power bus respectively; when the electric vehicle power line communication system further includes a converter signal synthesis and separation circuit, an instrument signal synthesis and separation circuit and an anti-theft device signal synthesis and separation circuit, the converter signal synthesis and separation circuit is arranged on the converter unit, the instrument signal synthesis and separation circuit is arranged on the instrument display unit, and the anti-theft device signal synthesis and separation circuit is arranged on the anti-theft device unit.

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