阅读说明：本技术 电动车的启动系统和方法 (Starting system and method of electric vehicle ) 是由 张秋新 于 2021-08-27 设计创作，主要内容包括：本发明提供了电动车的启动系统和方法,包括高压电池包、双路DC-DC单元和BCM,高压电池包包括第一继电器组、第二继电器组、BMS和遥控钥匙,遥控钥匙集成在BMS中,双路DC-DC单元包括第一路DC-DC单元和第二路DC-DC单元；BMS,用于与遥控钥匙认证通过后,控制第一继电器组吸合,以使第一路DC-DC单元输出第一电压,并向BCM发送车门解锁指令；当系统处于准备模式时,获取驾驶员的启动指令,根据启动指令控制第二继电器组吸合,以使第二路DC-DC单元输出第一电压；BCM,用于根据车门解锁指令控制车门解锁；其中,准备模式为系统没有三级故障,驾驶员踩下制动踏板并且当前档位为N档或P档。(The invention provides a starting system and a starting method of an electric vehicle, which comprise a high-voltage battery pack, a two-way DC-DC unit and a BCM (binary coded modulation), wherein the high-voltage battery pack comprises a first relay group, a second relay group, a BMS (battery management system) and a remote control key, the remote control key is integrated in the BMS, and the two-way DC-DC unit comprises a first-way DC-DC unit and a second-way DC-DC unit; the BMS is used for controlling the first relay group to pull in after the authentication of the BMS and the remote control key is passed, so that the first DC-DC unit outputs a first voltage and sends a vehicle door unlocking instruction to the BCM; when the system is in a preparation mode, a starting instruction of a driver is obtained, and the second relay set is controlled to be attracted according to the starting instruction, so that the second DC-DC unit outputs a first voltage; the BCM is used for controlling the unlocking of the vehicle door according to the vehicle door unlocking instruction; wherein, the preparation mode is that the system has no three-stage fault, the driver presses the brake pedal and the current gear is N gear or P gear.)

1. A starting system of an electric vehicle is characterized by comprising a high-voltage battery pack, a two-way DC-DC unit and a BCM, wherein the high-voltage battery pack comprises a first relay group, a second relay group, a BMS and a remote control key, the remote control key is integrated in the BMS, and the two-way DC-DC unit comprises a first-way DC-DC unit and a second-way DC-DC unit;

the two-way DC-DC unit and the BCM are respectively connected with the high-voltage battery pack, and the BCM is connected with the two-way DC-DC unit;

the BMS is used for controlling the first relay set to suck after passing the authentication with the remote control key so that the first DC-DC unit outputs a first voltage and sends a vehicle door unlocking instruction to the BCM;

when the system is in a preparation mode, a starting instruction of a driver is obtained, and the second relay set is controlled to be attracted according to the starting instruction, so that the second DC-DC unit outputs the first voltage;

the BCM is used for controlling unlocking of the vehicle door according to the vehicle door unlocking instruction;

wherein the preparation mode is that the system has no three-stage fault, the driver presses a brake pedal and the current gear is N gear or P gear.

2. The starting system of the electric vehicle as set forth in claim 1, wherein the BMS controls the second relay set to be turned off to turn off the second DC-DC unit when the power mode is switched from the standby mode to the other mode.

3. The starting system of the electric vehicle according to claim 1, wherein the BMS is configured to receive a power-down command sent by the key fob and control the first DC-DC unit to be powered down according to the power-down command, so as to enable the vehicle to be in a sleep state.

4. The starting system of the electric vehicle according to claim 1, wherein the remote control key is configured to encrypt a message to obtain an encrypted message, and send the encrypted message to the BMS.

5. The starting system of the electric vehicle according to claim 4, wherein the BMS is configured to decrypt the encrypted message to obtain a decrypted message, match the decrypted message with a pre-stored message, and pass authentication if the decrypted message is identical to the pre-stored message; and if the decrypted message is inconsistent with the prestored message, ending the power-on.

6. The starting system of the electric vehicle according to claim 1, wherein the BMS is configured to send a preparation message to the meter;

and the instrument is used for lighting a preparation indicator lamp according to the preparation message.

7. The starting system of an electric vehicle according to claim 1, wherein the first relay set comprises a KA1 relay and a KA2 relay, and the second relay set comprises a main positive relay and a main negative relay.

8. A starting method of an electric vehicle, applied to a starting system of an electric vehicle according to any one of claims 1 to 7, the system comprising a high voltage battery pack, a two-way DC-DC unit and a BCM, the high voltage battery pack comprising a first relay group, a second relay group, a BMS and a key fob integrated in the BMS, the two-way DC-DC unit comprising a first-way DC-DC unit and a second-way DC-DC unit; the method comprises the following steps:

after the BMS passes the authentication with the remote control key, controlling the first relay group to pull in so that the first DC-DC unit outputs a first voltage and sending a vehicle door unlocking instruction to the BCM;

when the system is in a preparation mode, a starting instruction of a driver is obtained, and the second relay set is controlled to be attracted according to the starting instruction, so that the second DC-DC unit outputs the first voltage;

the BCM controls unlocking of the vehicle door according to the vehicle door unlocking instruction;

wherein the preparation mode is that the system has no three-stage fault, the driver presses a brake pedal and the current gear is N gear or P gear.

9. An electronic device comprising a memory and a processor, the memory having stored thereon a computer program operable on the processor, wherein the processor implements the method of claim 8 when executing the computer program.

10. A computer-readable medium having non-volatile program code executable by a processor, the program code causing the processor to perform the method of claim 8.

Technical Field

The invention relates to the field of electric vehicle control, in particular to a starting system and a starting method of an electric vehicle.

Background

At present, the electric vehicle adopts a starting method of a lead-acid storage battery, and the lead-acid storage battery is adopted, so that the weight of the whole vehicle can be increased, and the endurance mileage of the electric vehicle is increased.

Disclosure of Invention

In view of this, the present invention aims to provide a starting system and method for an electric vehicle, which uses a dual-path DC-DC unit without using a lead-acid battery to implement high-voltage power-on and power-off and low-voltage power-on and power-off of the electric vehicle, thereby improving the reliability of power supply; the remote control key is integrated in the BMS, so that the anti-theft performance of the electric vehicle is improved.

In a first aspect, an embodiment of the present invention provides a starting system for an electric vehicle, where the system includes a high-voltage battery pack, a two-way DC-DC unit, and a BCM, where the high-voltage battery pack includes a first relay group, a second relay group, a BMS, and a remote control key, the remote control key is integrated in the BMS, and the two-way DC-DC unit includes a first-way DC-DC unit and a second-way DC-DC unit;

the two-way DC-DC unit and the BCM are respectively connected with the high-voltage battery pack, and the BCM is connected with the two-way DC-DC unit;

the BMS is used for controlling the first relay set to suck after passing the authentication with the remote control key so that the first DC-DC unit outputs a first voltage and sends a vehicle door unlocking instruction to the BCM;

when the system is in a preparation mode, a starting instruction of a driver is obtained, and the second relay set is controlled to be attracted according to the starting instruction, so that the second DC-DC unit outputs the first voltage;

the BCM is used for controlling unlocking of the vehicle door according to the vehicle door unlocking instruction;

wherein the preparation mode is that the system has no three-stage fault, the driver presses a brake pedal and the current gear is N gear or P gear.

Further, the BMS is configured to control the second relay set to be turned off when the power mode is switched from the preparation mode to another mode, so that the second path of DC-DC unit is turned off.

Further, the BMS is configured to receive a power-down instruction sent by the key fob and control the first DC-DC unit to power down according to the power-down instruction, so that the vehicle is in a sleep state.

Further, the remote control key is configured to encrypt a message to obtain an encrypted message, and send the encrypted message to the BMS.

Further, the BMS is configured to decrypt the encrypted message to obtain a decrypted message, match the decrypted message with a pre-stored message, and if the decrypted message is consistent with the pre-stored message, authenticate the message; and if the decrypted message is inconsistent with the prestored message, ending the power-on.

Further, the BMS is configured to send a preparation message to the meter;

and the instrument is used for lighting a preparation indicator lamp according to the preparation message.

Further, the first relay group includes KA1 relay and KA2 relay, the second relay group includes main positive relay and main negative relay.

In a second aspect, an embodiment of the present invention provides a starting method for an electric vehicle, which is applied to a starting system for an electric vehicle as described above, the system including a high-voltage battery pack, a two-way DC-DC unit and a BCM, the high-voltage battery pack including a first relay group, a second relay group, a BMS and a key fob, the key fob being integrated in the BMS, the two-way DC-DC unit including a first-way DC-DC unit and a second-way DC-DC unit; the method comprises the following steps:

after the BMS passes the authentication with the remote control key, controlling the first relay group to pull in so that the first DC-DC unit outputs a first voltage and sending a vehicle door unlocking instruction to the BCM;

when the system is in a preparation mode, a starting instruction of a driver is obtained, and the second relay set is controlled to be attracted according to the starting instruction, so that the second DC-DC unit outputs the first voltage;

the BCM controls unlocking of the vehicle door according to the vehicle door unlocking instruction;

wherein the preparation mode is that the system has no three-stage fault, the driver presses a brake pedal and the current gear is N gear or P gear.

In a third aspect, an embodiment of the present invention provides an electronic device, including a memory and a processor, where the memory stores a computer program operable on the processor, and the processor implements the method described above when executing the computer program.

In a fourth aspect, embodiments of the invention provide a computer readable medium having non-volatile program code executable by a processor, the program code causing the processor to perform the method as described above.

The embodiment of the invention provides a starting system and a starting method of an electric vehicle, which comprise a high-voltage battery pack, a two-way DC-DC unit and a BCM (binary coded modulation), wherein the high-voltage battery pack comprises a first relay group, a second relay group, a BMS (battery management system) and a remote control key, the remote control key is integrated in the BMS, and the two-way DC-DC unit comprises a first-way DC-DC unit and a second-way DC-DC unit; the two-way DC-DC unit and the BCM are respectively connected with the high-voltage battery pack, and the BCM is connected with the two-way DC-DC unit; the BMS is used for controlling the first relay group to pull in after the authentication of the BMS and the remote control key is passed, so that the first DC-DC unit outputs a first voltage and sends a vehicle door unlocking instruction to the BCM; when the system is in a preparation mode, a starting instruction of a driver is obtained, and the second relay set is controlled to be attracted according to the starting instruction, so that the second DC-DC unit outputs a first voltage; the BCM is used for controlling the unlocking of the vehicle door according to the vehicle door unlocking instruction; the preparation mode is that the system has no three-stage fault, a driver steps on a brake pedal, and the current gear is an N gear or a P gear; according to the electric vehicle, a lead-acid storage battery is not needed, a double-path DC-DC unit is adopted, high-voltage power-on and power-off and low-voltage power-on and power-off of the electric vehicle are realized, and the reliability of power supply of a power supply is improved; the remote control key is integrated in the BMS, so that the anti-theft performance of the electric vehicle is improved.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic view of a starting system of an electric vehicle according to a first embodiment of the present invention;

fig. 2 is a schematic structural diagram of a starting system of another electric vehicle according to a first embodiment of the present invention;

fig. 3 is a flowchart of a starting method of an electric vehicle according to a second embodiment of the present invention;

fig. 4 is a flowchart of a starting method of another electric vehicle according to a third embodiment of the present invention.

Icon:

1-a high voltage battery pack; 2-a two-way DC-DC unit; 3-BCM; 11-a first relay set; 12-a second relay set; 13-BMS; 14-a key fob; 21-a first path of DC-DC unit; and 22-a second DC-DC unit.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

For the understanding of the present embodiment, the following detailed description will be given of the embodiment of the present invention.

The first embodiment is as follows:

fig. 1 is a schematic view of a starting system of an electric vehicle according to a first embodiment of the present invention.

Referring to fig. 1, the System includes a high voltage Battery pack 1, a two-way DC-DC unit 2, and a BCM (Body Control Module) 3, where the high voltage Battery pack 1 includes a first relay group 11, a second relay group 12, a BMS (Battery Management System) 13, and a Remote Control key (RKE) 14, the Remote Control key 14 is integrated in a BMS13, and the two-way DC-DC unit 2 includes a first-way DC-DC unit 21 and a second-way DC-DC unit 22;

the two-way DC-DC unit 2 and the BCM3 are respectively connected with the high-voltage battery pack 1, and the BCM3 is connected with the two-way DC-DC unit 2;

the BMS13 is used for controlling the first relay set 11 to suck after the authentication with the remote control key 14 is passed, so that the first DC-DC unit 21 outputs a first voltage and sends a door unlocking instruction to the BCM 3;

when the system is in the preparation mode, a starting instruction of a driver is obtained, and the second relay group 12 is controlled to be attracted according to the starting instruction, so that the second DC-DC unit 22 outputs a first voltage;

the BCM3 is used for controlling the unlocking of the vehicle door according to the vehicle door unlocking instruction;

wherein, the preparation mode is that the system has no three-stage fault, the driver presses the brake pedal and the current gear is N gear or P gear.

Here, this application regards BMS13 as the core control unit of whole car system, and based on the low pressure with the electrical apparatus load (12V with electrical apparatus) requirement and the reliability of power supply system, through adopting double-circuit DC-DC unit 2, realize the low pressure of electric automobile and go up the electric function with high pressure. The key fob 14 is integrated in the BMS13, and the BMS13 is packaged inside the power battery, and the power battery is a high voltage component, which improves the technical difficulty of vehicle theft and the theft prevention of the electric vehicle.

Specifically, after the authentication is passed, the BMS13 controls the first relay set 11 to pull in, the first path of DC-DC unit 21 works normally, and outputs a first voltage; after the first DC-DC unit 21 outputs the first voltage, the BCM3 receives a door unlocking command sent by the BMS13, the door is unlocked, and the driver enters the passenger compartment to realize the switching of the ACC/ON/OFF gear power mode;

when the system is in a preparation mode, a driver presses a start button to generate a start instruction, at the moment, the BMS13 controls the second relay group 12 to suck according to the start instruction to complete high-voltage electrification, meanwhile, the second path of DC-DC unit 22 outputs a first voltage, and the first path of DC-DC unit 21 jointly supply power to a low-voltage electrical appliance load. Wherein, the first voltage may be 12V.

Further, the BMS13 is configured to control the second relay set 12 to be turned off when the power mode is switched from the standby mode to the other mode, so that the second DC-DC unit 22 is turned off.

Here, when the power mode is switched from the standby mode to the other mode, the high voltage is powered down, the BMS13 controls the second relay set 12 to be turned off, and the second DC-DC unit 22 to be turned off.

Further, the BMS13 is configured to receive a power-off command sent by the key fob 14, and control the first DC-DC unit 21 to power off according to the power-off command, so that the vehicle is in a sleep state.

Here, after the remote control locks the vehicle, the BMS13 issues a power-down command, and the first DC-DC unit 21 is powered down, so that the vehicle is in a sleep state.

Further, the key fob 14 is configured to encrypt the message to obtain an encrypted message, and send the encrypted message to the BMS 13.

Further, the BMS13 is configured to decrypt the encrypted message to obtain a decrypted message, match the decrypted message with a pre-stored message, and pass authentication if the decrypted message is identical to the pre-stored message; and if the decrypted message is inconsistent with the prestored message, ending the power-on.

Specifically, the remote control key 14 and the BMS13 are authenticated through a symmetric encryption algorithm, the remote control key 14 and the BMS13 share one key, the remote control key 14 encrypts a message to be sent and sends the message through a radio frequency signal, the BMS13 decrypts the message by using the same key after receiving the encrypted message, and if the decrypted message is consistent with a pre-stored message, the authentication is passed; and if the decrypted message is inconsistent with the prestored message, ending the power-on.

Further, the BMS13 is used for sending a preparation message to the instrument;

and the instrument is used for lighting the preparation indicator lamp according to the preparation message.

Further, referring to fig. 2, the first relay group includes KA1 relay and KA2 relay, and the second relay group includes main positive relay and main negative relay. The high-voltage battery pack comprises a BMS, a high-voltage battery module, a BCM, a first relay group and a second relay group. BMS, BCM, MCU, an electric compressor, and PTC (ceramic heater) which are motor controllers, communicate via a CAN (Controller Area Network) bus. The two-path DC-DC unit integrates the first path of DC-DC unit and the second path of DC-DC unit, and can simultaneously output two paths of 12V low-voltage power supplies, so that the safety of a 12V low-voltage power supply system is ensured.

The embodiment of the invention provides a starting system of an electric vehicle, which comprises a high-voltage battery pack, a two-way DC-DC unit and a BCM (binary coded modulation), wherein the high-voltage battery pack comprises a first relay group, a second relay group, a BMS (battery management system) and a remote control key, the remote control key is integrated in the BMS, and the two-way DC-DC unit comprises a first-way DC-DC unit and a second-way DC-DC unit; the two-way DC-DC unit and the BCM are respectively connected with the high-voltage battery pack, and the BCM is connected with the two-way DC-DC unit; the BMS is used for controlling the first relay group to pull in after the authentication of the BMS and the remote control key is passed, so that the first DC-DC unit outputs a first voltage and sends a vehicle door unlocking instruction to the BCM; when the system is in a preparation mode, a starting instruction of a driver is obtained, and the second relay set is controlled to be attracted according to the starting instruction, so that the second DC-DC unit outputs a first voltage; the BCM is used for controlling the unlocking of the vehicle door according to the vehicle door unlocking instruction; the preparation mode is that the system has no three-stage fault, a driver steps on a brake pedal, and the current gear is an N gear or a P gear; according to the electric vehicle, a lead-acid storage battery is not needed, a double-path DC-DC unit is adopted, high-voltage power-on and power-off and low-voltage power-on and power-off of the electric vehicle are realized, and the reliability of power supply of a power supply is improved; the remote control key is integrated in the BMS, so that the anti-theft performance of the electric vehicle is improved.

Example two:

fig. 3 is a flowchart of a starting method of an electric vehicle according to a second embodiment of the present invention.

Referring to fig. 3, the starting system applied to the electric vehicle as described above includes a high voltage battery pack including a first relay group, a second relay group, a BMS, and a key fob integrated in the BMS, a two-way DC-DC unit including the first and second DC-DC units, and a BCM; the method comprises the following steps:

step S101, after the BMS and the remote control key pass the authentication, controlling a first relay group to pull in so that a first DC-DC unit outputs a first voltage and sending a vehicle door unlocking instruction to a BCM;

step S102, when the system is in a preparation mode, a starting instruction of a driver is obtained, and the second relay set is controlled to be attracted according to the starting instruction, so that the second DC-DC unit outputs a first voltage;

step S103, the BCM controls the unlocking of the vehicle door according to the vehicle door unlocking instruction;

wherein, the preparation mode is that the system has no three-stage fault, the driver presses the brake pedal and the current gear is N gear or P gear.

Example three:

fig. 4 is a flowchart of a starting method of another electric vehicle according to a third embodiment of the present invention.

Referring to fig. 4, the method includes the steps of:

step S201, remote control unlocking/anti-theft authentication is carried out, and step S202 is executed after the authentication is passed; when the authentication is not passed, step S203 is executed;

step S202, the BMS controls the first relay group to pull in, so that the first path of DC-DC unit outputs a first voltage;

step S203, ending the power-on process;

step S204, a driver enters a passenger compartment;

step S205, switching between the power modes of the ACC/ON/OFF gear;

step S206, when the system is in a preparation mode, a driver presses a start key and then generates a start instruction;

step S207, the BMS sends out a second relay set suction instruction, and when the second relay set is sucked, the step S208 is executed; when the second relay group is not engaged, executing step S209;

step S208, the second path of DC-DC unit outputs a first voltage;

step S209, reporting the fault and ending the power-on process;

and step S210, completing power-on.

The embodiment of the invention provides a starting method of an electric vehicle, which comprises the following steps: after the BMS and the remote control key pass the authentication, controlling a first relay group to pull in so that a first DC-DC unit outputs a first voltage and sending a vehicle door unlocking instruction to the BCM; when the system is in a preparation mode, a starting instruction of a driver is obtained, and the second relay set is controlled to be attracted according to the starting instruction, so that the second DC-DC unit outputs a first voltage; the BCM controls the unlocking of the vehicle door according to the vehicle door unlocking instruction; the preparation mode is that the system has no three-stage fault, a driver steps on a brake pedal, and the current gear is an N gear or a P gear; according to the electric vehicle, a lead-acid storage battery is not needed, a double-path DC-DC unit is adopted, high-voltage power-on and power-off and low-voltage power-on and power-off of the electric vehicle are realized, and the reliability of power supply of a power supply is improved; the remote control key is integrated in the BMS, so that the anti-theft performance of the electric vehicle is improved.

The embodiment of the present invention further provides an electronic device, which includes a memory, a processor, and a computer program stored in the memory and capable of running on the processor, and when the processor executes the computer program, the steps of the method for starting an electric vehicle provided in the above embodiment are implemented.

Embodiments of the present invention also provide a computer readable medium having non-volatile program codes executable by a processor, where the computer readable medium has a computer program stored thereon, and the computer program is executed by the processor to perform the steps of the starting method of the electric vehicle according to the above embodiments.

The computer program product provided in the embodiment of the present invention includes a computer-readable storage medium storing a program code, where instructions included in the program code may be used to execute the method described in the foregoing method embodiment, and specific implementation may refer to the method embodiment, which is not described herein again.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the system and the apparatus described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In addition, in the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.