Charging communication system of electric vehicle and electric vehicle

Abstract

The utility model provides a charging communication system of an electric vehicle and the electric vehicle. The system comprises a controller, a driver, a battery, a relay, a charging port and a charger, when the charger is inserted into the charging port, the second communication end of the controller is changed from a high level to a low level, and after an insertion signal is recognized, a communication message is sent to the charger through the first communication end; when the charger recognizes the communication message, response information is replied to the controller, and handshake between the charger and the controller succeeds; the controller sends a high-level starting signal to the driver, the driver converts a low-voltage signal into a high-voltage signal according to the high-level starting signal and drives the relay through the high-voltage signal, so that a main contact of the relay is closed, and the charger is communicated with the battery; when charging is finished, the charger sends a charging completion signal to the controller through the first communication end, the controller controls the driver to be closed, then the main contact of the relay is disconnected, the charger and the battery are disconnected, cost is low, and assembling is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of electric vehicle control, in particular to a charging communication system of an electric vehicle and an electric vehicle. Background Art

[0002] At present, electric vehicle fires occur frequently, and the highest proportion of electric vehicle fires is spontaneous combustion during charging, which is mainly caused by random matching between the charger and the battery.

[0003] Consumers pay more attention to the safe use of electric vehicles, and the new national standard requires that chargers must communicate and recognize each other with the entire vehicle.

[0004] At present, a BMS (Battery Management System) is added to the battery side to communicate and recognize each other with the charger. However, this method is costly. Utility Model Content

[0005] In view of this, the purpose of the utility model is to provide a charging communication system for an electric vehicle and an electric vehicle, which can realize the communication handshake between the charger and the whole vehicle without using a high-cost BMS, and has low cost and convenient assembly.

[0006] In a first aspect, an embodiment of the utility model provides a charging communication system for an electric vehicle, the system comprising: a controller, a driver, a battery, a relay, a charging port and a charger;

[0007] The battery, the controller, the driver and the relay are connected in sequence, the controller is connected to the charger through the charging port, the driver is connected to the battery, and the relay is connected to the battery;

[0008] When the charger is inserted into the charging port, the second communication terminal of the controller changes from a high level to a low level, and after recognizing the insertion signal, a communication message is sent to the charger through the first communication terminal;

[0009] When the charger recognizes the communication message, it replies a response message to the controller, and the charger and the controller shake hands successfully;

[0010] The controller sends a high-level start signal to the driver, and the driver converts the low-voltage signal into a high-voltage signal according to the high-level start signal, and drives the relay through the high-voltage signal to close the main contact of the relay, so that the charger is connected to the battery;

[0011] When charging is finished, the charger sends a charging completion signal to the controller through the first communication terminal, and the controller controls the driver to turn off, thereby disconnecting the main contact of the relay, and the charger is disconnected from the battery.

[0012] Furthermore, after the charger recognizes the communication message, it does not reply the response information to the controller, and the handshake between the charger and the controller fails.

[0013] Furthermore, when an abnormality occurs in the charger during the charging process, the internal circuit is controlled to be disconnected; and an abnormal signal is sent to the controller so that the controller controls the driver to be turned off, thereby disconnecting the main contacts of the relay, and the charger is disconnected from the battery.

[0014] Furthermore, the input end of the driver is connected to the controller, the negative pole of the driver is connected to the negative pole of the battery, the positive pole of the driver is connected to the positive pole of the battery, and the output end of the driver is connected to the positive pole of the relay control end.

[0015] Further, the driver includes a first resistor, a second resistor, a third resistor, a first triode and a second triode, the base of the first triode is respectively connected to one end of the first resistor and one end of the second resistor, the other end of the first resistor is connected to the positive electrode of the battery, the other end of the second resistor is connected to the collector of the second triode, the emitter of the first triode is connected to the positive electrode of the battery, and the collector of the first triode is connected to the output end of the driver;

[0016] The emitter of the second transistor is connected to the negative electrode of the battery, the base of the second transistor is connected to one end of the third resistor, and the other end of the third resistor is connected to the input end of the driver.

[0017] Furthermore, the positive electrode of the controller is connected to the positive electrode of the battery, and the negative electrode of the controller is connected to the negative electrode of the battery.

[0018] Furthermore, the negative electrode of the relay is connected to the negative electrode of the battery, and the main contacts of the relay are respectively connected to the positive electrode of the battery and the positive electrode of the charger.

[0019] Furthermore, the first communication terminal of the controller is connected to the first communication terminal of the charging port, and the second communication terminal of the controller is connected to the second communication terminal of the charging port.

[0020] Furthermore, the second communication port of the charger is short-circuited with the negative electrode.

[0021] In a second aspect, an embodiment of the utility model provides an electric vehicle, including the charging communication system of the electric vehicle as described above.

[0022] The embodiment of the utility model provides a charging communication system for an electric vehicle and an electric vehicle, the system comprising: a controller, a driver, a battery, a relay, a charging port and a charger; the battery, the controller, the driver and the relay are connected in sequence, the controller is connected to the charger through the charging port, the driver is connected to the battery, and the relay is connected to the battery; when the charger is inserted into the charging port, the second communication terminal of the controller changes from a high level to a low level, and after recognizing the insertion signal, a communication message is sent to the charger through the first communication terminal; when the charger recognizes the communication message, it replies a response message to the controller, and the charger and the controller shake hands successfully; the controller sends a high-level start signal to the driver, and the driver converts the low-voltage signal into a high-voltage signal according to the high-level start signal, and drives the relay through the high-voltage signal, so that the main contact of the relay is closed, and the charger is connected to the battery; when charging is completed, the charger sends a charging completion signal to the controller through the first communication terminal, the controller controls the driver to close, and then the main contact of the relay is disconnected, and the charger is disconnected from the battery; the communication handshake between the charger and the whole vehicle can be realized without using a high-cost BMS, the cost is low, and the assembly is convenient.

[0023] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by practicing the utility model. The purpose and other advantages of the utility model are realized and obtained by the structures specifically pointed out in the description, claims and drawings.

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 A schematic diagram of a charging communication system for an electric vehicle provided in Embodiment 1 of the utility model;

[0027] Figure 2 A schematic diagram of the circuit structure of a charging communication system for an electric vehicle provided in Embodiment 1 of the utility model;

[0028] Figure 3 This is a schematic diagram of the driver circuit structure provided in Example 1 of the utility model.

[0029] icon:

[0030] 1-controller; 2-driver; 3-battery; 4-relay; 5-charging port; 6-charger. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] To facilitate understanding of this embodiment, the embodiment of the utility model is described in detail below.

[0033] Embodiment 1:

[0034] Figure 1 This is a schematic diagram of a charging communication system for an electric vehicle provided in Embodiment 1 of the present utility model.

[0035] Reference Figure 1 The system includes: a controller 1, a driver 2, a battery 3, a relay 4, a charging port 5 and a charger 6; wherein COM1 is a first communication terminal, and COM2 is a second communication terminal;

[0036] The battery 3, the controller 1, the driver 2 and the relay 4 are connected in sequence, the controller 1 is connected to the charger 6 via the charging port 5, the driver 2 is connected to the battery 3, and the relay 4 is connected to the battery 3;

[0037] When the charger 6 is not plugged into the charging port 5 , the vehicle is parked, the vehicle circuit is not working, and the controller 1 is in a shutdown state because the vehicle ACC is not started.

[0038] When the charger 6 is plugged into the charging port 5, the second communication terminal of the controller 1 changes from a high level to a low level, and after recognizing the insertion signal, the internal circuit of the controller 1 is started, and the controller 1 acts as a communication host and sends a communication message to the charger 6 through the first communication terminal; wherein, the internal circuit of the controller 1 refers to the circuit inside the controller 1 that powers itself.

[0039] When the charger 6 recognizes the communication message, it replies a response message to the controller 1, and the handshake between the charger 6 and the controller 1 succeeds;

[0040] The controller 1 sends a high-level start signal to the driver 2. The driver 2 converts the low-voltage signal into a high-voltage signal according to the high-level start signal, and drives the relay 4 through the high-voltage signal to close the main contact of the relay 4, so that the charger 6 is connected to the battery 3 (that is, the positive and negative electrodes of the charger are connected to the positive and negative electrodes of the battery);

[0041] When charging is completed, the charger 6 sends a charging completion signal to the controller 1 through the first communication terminal, and the controller 1 controls the driver 2 to turn off, thereby disconnecting the main contacts of the relay 4, and the charger 6 is disconnected from the battery 3 (that is, the positive and negative poles of the charger are disconnected from the positive and negative poles of the battery), thereby ensuring the charging safety of the entire vehicle.

[0042] Specifically, the battery includes lead-acid batteries, lithium-ion batteries, and sodium-ion batteries. The controller is the driving component of the motor and is a three-phase inverter. The positive and negative poles of the main circuit are connected to the battery. Other circuits in the controller include throttle signal input, brake signal input, ACC start, and motor, etc., which are not related to the working state of this application during charging and are not elaborated here.

[0043] The charging port is a national standard charging port that complies with GB42296, including lead-acid charging port and lithium battery charging port.

[0044] The charger is in accordance with GB42296, including a one-line communication interface, refer to Figure 2 As shown, the second communication port is short-circuited with the negative pole.

[0045] The driver is a driving circuit that converts a low voltage signal (such as a 5V voltage signal) into a high voltage signal through the I / O port of the controller.

[0046] The relay is a relay with a set of normally open contacts. The negative pole of the relay control terminal is connected to the negative pole of the battery, and the positive pole of the relay control terminal is connected to the output terminal of the driver.

[0047] Furthermore, when the charger recognizes the communication message, it does not reply to the controller, and the handshake between the charger and the controller fails. At this time, the relay cannot be closed, and the charger cannot charge the battery.

[0048] Furthermore, when an abnormality occurs in the charger during the charging process, the internal circuit is controlled to be disconnected; and an abnormal signal is sent to the controller so that the controller controls the driver to be turned off, thereby disconnecting the main contacts of the relay and disconnecting the charger from the battery.

[0049] Further, see Figure 3The driver includes a first resistor R1, a second resistor R2, a third resistor R3, a first transistor Q1 and a second transistor Q2, the base of the first transistor Q1 is connected to one end of the first resistor R1 and one end of the second resistor R2 respectively, the other end of the first resistor R1 is connected to the positive electrode of the battery, the other end of the second resistor R2 is connected to the collector of the second transistor Q2, the emitter of the first transistor Q1 is connected to the positive electrode of the battery, and the collector of the first transistor Q1 is connected to the output end of the driver;

[0050] The emitter of the second transistor Q2 is connected to the negative electrode of the battery, the base of the second transistor Q2 is connected to one end of the third resistor R3, and the other end of the third resistor R3 is connected to the input end of the driver.

[0051] Further, see Figure 2 The input end of the driver is connected to the controller, the negative pole of the driver is connected to the negative pole of the battery, the positive pole of the driver is connected to the positive pole of the battery, and the output end of the driver is connected to the positive pole of the relay control end.

[0052] Furthermore, the positive electrode of the controller 1 is connected to the positive electrode of the battery 3 , and the negative electrode of the controller 1 is connected to the negative electrode of the battery 3 .

[0053] Furthermore, the negative electrode of the relay 4 is connected to the negative electrode of the battery 3 , and the main contacts of the relay 4 are connected to the positive electrode of the battery 3 and the positive electrode of the charger 6 , respectively.

[0054] Furthermore, the first communication terminal of the controller 1 is connected to the first communication terminal of the charging port 5 , and the second communication terminal of the controller 1 is connected to the second communication terminal of the charging port 5 .

[0055] Furthermore, the second communication port of the charger 6 is short-circuited with the negative electrode.

[0056] An embodiment of the utility model provides an electric vehicle, including the charging communication system of the electric vehicle as described above.

[0057] The embodiment of the utility model provides a charging communication system for an electric vehicle and an electric vehicle, the system comprising: a controller, a driver, a battery, a relay, a charging port and a charger; the battery, the controller, the driver and the relay are connected in sequence, the controller is connected to the charger through the charging port, the driver is connected to the battery, and the relay is connected to the battery; when the charger is inserted into the charging port, the second communication terminal of the controller changes from a high level to a low level, and after recognizing the insertion signal, a communication message is sent to the charger through the first communication terminal; when the charger recognizes the communication message, it replies a response message to the controller, and the charger and the controller shake hands successfully; the controller sends a high-level start signal to the driver, and the driver converts the low-voltage signal into a high-voltage signal according to the high-level start signal, and drives the relay through the high-voltage signal, so that the main contact of the relay is closed, and the charger is connected to the battery; when charging is completed, the charger sends a charging completion signal to the controller through the first communication terminal, the controller controls the driver to close, and then the main contact of the relay is disconnected, and the charger is disconnected from the battery; the communication handshake between the charger and the whole vehicle can be realized without using a high-cost BMS, the cost is low, and the assembly is convenient.

[0058] The computer program product provided in the embodiment of the utility model includes a computer-readable storage medium storing program code. The instructions included in the program code can be used to execute the method described in the previous method embodiment. The specific implementation can be found in the method embodiment, which will not be repeated here.

[0059] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the system and device described above can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.

[0060] In addition, in the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0061] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the utility model can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the utility model. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc., which can store program codes.

[0062] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0063] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the utility model, which are used to illustrate the technical solution of the utility model, rather than to limit it. The protection scope of the utility model is not limited thereto. Although the utility model is described in detail with reference to the above-mentioned embodiments, ordinary technicians in this field should understand that any technician familiar with the technical field can still modify the technical solution recorded in the above-mentioned embodiments within the technical scope disclosed by the utility model, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solution deviate from the spirit and scope of the technical solution of the embodiment of the utility model, and should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model shall be based on the protection scope of the claims.

Claims

1. A charging communication system for an electric vehicle, characterized in that: The system includes: a controller, a driver, a battery, a relay, a charging port and a charger; The battery, the controller, the driver and the relay are connected in sequence, the controller is connected to the charger through the charging port, the driver is connected to the battery, and the relay is connected to the battery; When the charger is inserted into the charging port, the second communication terminal of the controller changes from a high level to a low level, and after recognizing the insertion signal, a communication message is sent to the charger through the first communication terminal; When the charger recognizes the communication message, it replies a response message to the controller, and the charger and the controller shake hands successfully; The controller sends a high-level start signal to the driver, and the driver converts the low-voltage signal into a high-voltage signal according to the high-level start signal, and drives the relay through the high-voltage signal to close the main contact of the relay, so that the charger is connected to the battery; When charging is finished, the charger sends a charging completion signal to the controller through the first communication terminal, and the controller controls the driver to turn off, thereby disconnecting the main contact of the relay, and the charger is disconnected from the battery.

2. The charging communication system for electric vehicles according to claim 1, characterized in that: When the charger recognizes the communication message, it does not reply the response information to the controller, and the handshake between the charger and the controller fails.

3. The charging communication system for electric vehicles according to claim 1, characterized in that: When an abnormality occurs in the charger during charging, the internal circuit is controlled to be disconnected; and an abnormal signal is sent to the controller so that the controller controls the driver to be turned off, thereby disconnecting the main contact of the relay, and the charger is disconnected from the battery.

4. The charging communication system for electric vehicles according to claim 1, characterized in that: The input end of the driver is connected to the controller, the negative electrode of the driver is connected to the negative electrode of the battery, the positive electrode of the driver is connected to the positive electrode of the battery, and the output end of the driver is connected to the positive electrode of the relay control end.

5. The charging communication system for electric vehicles according to claim 4, characterized in that: The driver comprises a first resistor, a second resistor, a third resistor, a first triode and a second triode, the base of the first triode is connected to one end of the first resistor and one end of the second resistor respectively, the other end of the first resistor is connected to the positive electrode of the battery, the other end of the second resistor is connected to the collector of the second triode, the emitter of the first triode is connected to the positive electrode of the battery, and the collector of the first triode is connected to the output end of the driver; The emitter of the second transistor is connected to the negative electrode of the battery, the base of the second transistor is connected to one end of the third resistor, and the other end of the third resistor is connected to the input end of the driver.

6. The charging communication system for electric vehicles according to claim 1, characterized in that: The positive electrode of the controller is connected to the positive electrode of the battery, and the negative electrode of the controller is connected to the negative electrode of the battery.

7. The charging communication system for electric vehicles according to claim 6, characterized in that: The negative electrode of the relay is connected to the negative electrode of the battery, and the main contacts of the relay are connected to the positive electrode of the battery and the positive electrode of the charger respectively.

8. The charging communication system for electric vehicles according to claim 7, characterized in that: The first communication end of the controller is connected to the first communication end of the charging port, and the second communication end of the controller is connected to the second communication end of the charging port.

9. The charging communication system for electric vehicles according to claim 8, characterized in that: The second communication port of the charger is short-circuited with the negative electrode.

10. An electric vehicle, characterized in that: A charging communication system for an electric vehicle comprising any one of claims 1 to 9.

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