CN216184940U - Intelligent control system for electric automobile - Google Patents

Abstract

The utility model discloses an intelligent control system for an electric automobile, which comprises a control instruction sending module, an automobile body controller and a distribution box, wherein the control instruction sending module is used for sending a control instruction to the automobile body controller; wherein: the control instruction sending module is used for sending a control instruction to the vehicle body controller; the control instruction sending module comprises a starting switch or an automatic driving module; the automatic driving module is integrated in the vehicle body controller; the vehicle body controller is used for forming a relay control signal based on the received control instruction and sending the relay control signal to a distribution box through a vehicle CAN network; the distribution box is internally provided with a CAN network communication chip and a relay, the CAN network communication chip realizes signal transmission with the whole vehicle CAN network, and is used for receiving a relay control signal and realizing disconnection and suction of the corresponding relay according to the relay control signal.

Description

Intelligent control system for electric automobile

Technical Field

The utility model belongs to the technical field of unmanned driving, and particularly relates to an intelligent control system for an electric automobile.

Background

At the stage of more and more mature development of the current vehicle technology, along with the development of the vehicle power-on and power-off control technology, new network architecture, communication technology and intelligent chip technology are more and more applied to the field of traditional electric appliance control, and the intelligent power-on and power-off control system is taken as a mainstream scheme of a vehicle power-on and power-off system in future. In the prior art, the low-voltage power-on and power-off control of the automobile is still mainly controlled by a mechanical switch, and the low-voltage power-on and power-off control system comprises the following main components: a start switch, a key receiving antenna, an autopilot module, a body controller, a relay, a distribution box, a wire harness, and the like. However, this technique has the following problems:

(1) the information interaction and authentication among all electronic parts are complicated, and the system response delay is large;

(2) the wiring harness has a plurality of loops, the relay is controlled to be attracted through the hard wiring harness loop, and the failure risk exists after the vehicle is used for a long time, so the system safety is low;

(3) the fault of the whole system is determined only by testing whether the wiring harness loop is conducted through tools such as a multimeter and a conductor, and the like, and no historical fault record exists, so that after-sale maintenance is inconvenient, and the diagnosis efficiency is low.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: the utility model provides an intelligent control system for an electric automobile, which aims to reduce the number of electrical parts in a vehicle power-on and power-off system and realize an unmanned intelligent driving function.

The technical scheme is as follows: an intelligent control system for an electric automobile comprises a control instruction sending module, an automobile body controller, an entire automobile CAN network and a distribution box; wherein:

the control instruction sending module is used for sending a control instruction to the vehicle body controller; the control instruction sending module comprises a starting switch or an automatic driving module; the automatic driving module is integrated in the vehicle body controller;

the vehicle body controller is used for obtaining a relay control signal according to the received control instruction and sending the relay control signal to a distribution box through a vehicle CAN network;

the distribution box is internally provided with a CAN network communication chip and a relay, and the CAN network communication chip realizes signal transmission with a finished automobile CAN network and is used for receiving a relay control signal; each relay is connected with the CAN network communication chip and is disconnected or attracted according to the relay control signal.

Further, the starting switch sends a control instruction to the vehicle body controller through the whole vehicle CAN network.

Further, the control commands include low-voltage up/down control commands, high-voltage up/down control commands and power mode switching control commands.

Further, the power supply modes comprise a low-voltage power supply mode, a driving state mode, a charging mode and a high-voltage power mode.

Further, the relay includes an ACC relay, an ON relay, and a START relay;

the relay control signal includes:

when the control instruction is a low-voltage electrifying control instruction, the relay control signal is an ACC relay or the attraction of an ACC relay and an ON relay;

when the control instruction is a low-voltage power-down control instruction, the relay control signal is ACC, and the ON relay is disconnected;

when the control instruction is a high-voltage electrifying control instruction, the relay control signal is START relay actuation;

when the control instruction is a high-voltage power-off control instruction, the relay control signal is that the START relay is switched off;

when the control instruction is a switching control instruction of a power supply mode, according to the relay state in the current power supply mode and the relay state in the target power supply mode, the relay control signal carries out relay state conversion on the corresponding relay, and the state conversion is from an attraction state to a disconnection state, from the disconnection state to the attraction state, and keeps the current state;

the relay states in each power mode include:

in the low-voltage power supply mode, the ACC relay is attracted, or the ACC relay and the ON relay are attracted simultaneously;

in the driving state mode, the ACC relay, the ON relay and the START relay are simultaneously attracted;

in the charging mode, no relay is attracted, or an ACC relay and an ON relay are attracted simultaneously;

in the high-voltage mode, the ACC relay and the ON relay are simultaneously attracted.

Has the advantages that: compared with the prior art, the automatic driving module is cancelled, the automatic driving module is integrated into a vehicle body controller, a relay wire harness hard wire loop in a distribution box is cancelled, a CAN network communication chip is added in the distribution box, and the actuation of a relay in the distribution box is intelligently controlled through a finished vehicle CAN communication network; the utility model has the following advantages:

1. through the whole vehicle network communication, the system response time can be reduced from second level to hundred millisecond level, and the system response time is greatly improved;

2. by reducing the hard wire loop of the wire harness, the wire harness loop is clear and concise, the data and cost of the whole vehicle loop are reduced, the failure occurrence probability of the wire harness in the whole system is reduced, and meanwhile, the whole vehicle network communication is used, so that information instructions can be transmitted more stably, and the reliability of the system is greatly improved;

3. whether the system has historical faults can be clearly diagnosed by adding vehicle-mounted diagnosis equipment or an operation interface, whether the system has accidental instantaneous failure can be monitored in real time, and diagnosis efficiency is greatly improved;

4. through using intelligent distribution box, make the autopilot module can control vehicle power, realize that the vehicle is on, off electricity and the mode switch of power, and then realize unmanned autopilot.

Drawings

FIG. 1 is a schematic diagram of a system architecture;

FIG. 2 is a schematic view of a scene during manual driving;

fig. 3 is a schematic view of a scene during automatic driving.

Detailed Description

The technical solution of the present invention will be further explained with reference to the accompanying drawings and examples.

As shown in fig. 1, the utility model discloses a power-on and power-off control device for an unmanned vehicle, which is used for realizing low-voltage power-on and power-off intelligent control, high-voltage power-on and power-off intelligent control and vehicle power mode switching control. On an electric automobile, low-voltage electricity is used for vehicle-mounted electronic component parts such as instruments and vehicle lamps, and high-voltage electricity is used for a power part; the power mode comprises a low-voltage power mode, a driving state mode, a charging mode and a high-voltage power mode.

The control device of the present invention includes: the system comprises a starting switch, a key receiving antenna, an automatic driving module, a vehicle body controller and a distribution box; the starting switch comprises switches of vehicle-mounted electronic components such as instruments and lamps and a starting switch of a vehicle power part; the starting switch and the key receiving antenna are both connected with the vehicle body controller through a wire harness, and an automatic driving module is integrated in the vehicle body controller. And the starting switch and the automatic driving module send a control instruction to the vehicle body controller. And the vehicle body controller obtains a relay control signal according to the received control instruction and sends the relay control signal to the distribution box through the whole vehicle CAN network. The utility model cancels a relay wire harness hard wire loop in the distribution box, and the distribution box is provided with a CAN network communication chip which communicates with the original CAN network of the vehicle to form a communication network. Through CAN network communication chip, receive the control command that comes from automobile body controller, based on control command, the relay breaks off or closes, realizes that low pressure is electric intelligent control, high pressure is electric intelligent control and whole car power mode switches from top to bottom.

The relay of the present invention includes an ACC relay, an ON relay, and a START relay; based on the control instruction, the relay is opened or closed, specifically:

when the control instruction is a low-voltage electrifying control instruction, the ACC relay or the ACC and ON relay is closed;

when the control instruction is a low-voltage power-down control instruction, the ACC and the ON relay are disconnected;

when the control instruction is a high-voltage electrifying control instruction, the START relay is closed;

when the control instruction is a high-voltage power-off control instruction, the START relay is disconnected;

when the control instruction is a switching control instruction of the power supply mode, according to the state of the relay in the current power supply mode and the state of the relay in the target power supply mode, the corresponding relay performs relay state conversion, the state is converted from the pull-in state to the off state, the state is converted from the off state to the pull-in state, and the current state is maintained;

the relay states in each power mode include:

in the low-voltage power supply mode, the ACC relay is attracted, or the ACC relay and the ON relay are attracted simultaneously;

in the driving state mode, the ACC relay, the ON relay and the START relay are simultaneously attracted;

in the charging mode, no relay is attracted, or an ACC relay and an ON relay are attracted simultaneously;

in the high-voltage mode, the ACC relay and the ON relay are simultaneously attracted.

For example, when the low-voltage power supply mode is converted into the driving state mode, the ACC relay keeps the current state, the ON relay is attracted, and the START relay is attracted, so that the low-voltage power supply mode is converted into the driving state mode.

Because a relay is a common electric control device in the field of automation control, the relay has an interaction relationship between a control system (also called an input loop) and a controlled system (also called an output loop), and is generally applied to an automatic control circuit, and the relay is actually an 'automatic switch' which uses a small current to control a large current to operate. Therefore, the control part involved in the "opening or closing of the relay based on the control command" of the present invention is common knowledge of those skilled in the art.

The technical scheme of the utility model is further explained by combining a manual driving scene and an automatic driving scene.

In a manual driving scenario, as shown in fig. 2:

when the key is placed in a specified area in the vehicle, the key receiving antenna senses that the key is in a corresponding position;

pressing a starting switch (not stepping on a brake), and sending a power-on instruction to the vehicle body controller by the starting switch;

after confirming that the power-on condition is met, the vehicle body controller sends a power-on instruction to the distribution box through the whole vehicle CAN network;

after receiving a power-on instruction of the vehicle body controller, the distribution box actuates corresponding relays, the storage battery supplies power of corresponding modes to the whole vehicle, and each electric module of the whole vehicle enters a corresponding functional state.

In the autonomous driving scenario, as shown in fig. 3:

and after receiving the remote execution power-on request instruction, the automatic driving function module sends the power-on instruction to the vehicle body controller.

After confirming that the power-on condition is met, the vehicle body controller sends a power-on instruction to the distribution box through the whole vehicle CAN network;

after receiving a power-on instruction of the vehicle body controller, the distribution box actuates corresponding power supply relays, the storage battery supplies power of corresponding modes to the whole vehicle, and each electric appliance module of the whole vehicle enters a corresponding functional state.

Claims (5)

1. The utility model provides an intelligence control system for electric automobile which characterized in that: the system comprises a control instruction sending module, a vehicle body controller, a whole vehicle CAN network and a distribution box; wherein:

the control instruction sending module is used for sending a control instruction to the vehicle body controller; the control instruction sending module comprises a starting switch or an automatic driving module; the automatic driving module is integrated in the vehicle body controller;

the vehicle body controller is used for obtaining a relay control signal according to the received control instruction and sending the relay control signal to a distribution box through a vehicle CAN network;

the distribution box is internally provided with a CAN network communication chip and a relay, and the CAN network communication chip realizes signal transmission with a finished automobile CAN network and is used for receiving a relay control signal; each relay is connected with the CAN network communication chip and is disconnected or attracted according to the relay control signal.

2. The intelligent control system for the electric vehicle according to claim 1, wherein: and the starting switch sends a control instruction to the vehicle body controller through the whole vehicle CAN network.

3. The intelligent control system for the electric vehicle according to claim 1 or 2, characterized in that: the control instructions comprise low-voltage up/down control instructions, high-voltage up/down control instructions and power mode switching control instructions.

4. The intelligent control system for the electric vehicle according to claim 3, characterized in that: the power modes include a low voltage power mode, a driving state mode, a charging mode and a high voltage mode.

5. The intelligent control system for the electric vehicle according to claim 4, wherein: the relays include an ACC relay, an ON relay, and a START relay;

the relay control signal includes:

when the control instruction is a low-voltage electrifying control instruction, the relay control signal is an ACC relay or the attraction of an ACC relay and an ON relay;

when the control instruction is a low-voltage power-down control instruction, the relay control signal is ACC, and the ON relay is disconnected;

when the control instruction is a high-voltage electrifying control instruction, the relay control signal is START relay actuation;

when the control instruction is a high-voltage power-off control instruction, the relay control signal is that the START relay is switched off;

when the control instruction is a switching control instruction of a power supply mode, according to the relay state in the current power supply mode and the relay state in the target power supply mode, the relay control signal carries out relay state conversion on the corresponding relay, and the state conversion is from an attraction state to a disconnection state, from the disconnection state to the attraction state, and keeps the current state;

the relay states in each power mode include:

in the low-voltage power supply mode, the ACC relay is attracted, or the ACC relay and the ON relay are attracted simultaneously;

in the driving state mode, the ACC relay, the ON relay and the START relay are simultaneously attracted;

in the charging mode, no relay is attracted, or an ACC relay and an ON relay are attracted simultaneously;

in the high-voltage mode, the ACC relay and the ON relay are simultaneously attracted.

Images