CN211441963U

CN211441963U - Whole car control circuit of new energy automobile

Info

Publication number: CN211441963U
Application number: CN201921686477.4U
Authority: CN
Inventors: 盛德涛; 石小朋; 李军; 狄金刚; 杨雪岩; 彭益彬
Original assignee: Hengshui Zebra Automobile R & D Co ltd
Current assignee: Hengshui Zebra Automobile R & D Co ltd
Priority date: 2019-10-10
Filing date: 2019-10-10
Publication date: 2020-09-08
Anticipated expiration: 2029-10-10

Abstract

The utility model discloses a new energy automobile puts in order car control circuit, including vehicle control unit, machine controller, battery management system, main control box high voltage contactor, the owner of unifying more and burden contactor, trigger and total positive contactor, vehicle control unit sets up ON shelves, OFF shelves, ACC shelves and START shelves, vehicle control unit includes low voltage battery and the total switch of manipulator brake power, vehicle control unit control machine controller, battery management system, main control box high voltage contactor, the owner of unifying more and burden contactor, trigger and total connection and disconnection between the positive contactor have changed whole car control strategy and circuit, have reorganized internal configuration, have guaranteed whole brake system's security, the utility model discloses extensively be applicable to car and relevant trade.

Description

Whole car control circuit of new energy automobile

Technical Field

The utility model relates to an auto-parts technical field specifically is a whole car control circuit of new energy automobile.

Background

The current controller of the truck is generally a five-in-one controller, the interior of the controller is MCU, PDU, DC/DC, DC/AC, and an insulation detector.

Disclosure of Invention

The utility model provides a can better LED lamp radiator of radiating effect in order to solve the not good problem of radiating effect among the prior art.

In order to solve the technical problem, the utility model discloses a following technical scheme:

the utility model provides a new energy automobile puts in order car control circuit, includes vehicle control unit, machine controller, battery management system, main control box high voltage contactor, unifies owner's negative contactor, trigger and total positive contactor more, vehicle control unit sets up ON shelves, OFF shelves, ACC shelves and START shelves, vehicle control unit includes low voltage battery and mechanical hand brake power master switch, vehicle control unit control machine controller, battery management system, main control box high voltage contactor, unifies owner's negative contactor more, connection and disconnection between trigger and the total positive contactor more.

And the vehicle control unit controls the on-off of the main anode contactor.

The all-in-one main negative contactor is connected with an air compressor, and the air compressor is driven by electricity.

When the ON gear is opened, the motor controller carries out low-voltage self-checking to check whether a fault exists, and if the fault exists, the main anode contactor and the motor controller are not attracted.

The battery management system controls the main control box high-voltage contactor and the all-in-one main negative contactor, the vehicle control unit sends a power-ON instruction under the condition that the ON gear self-check has no fault, and the power-ON is carried out by closing the all-in-one main negative contactor;

when the vehicle control unit sends a power-off command, the main control box high-voltage contactor is disconnected with the all-in-one main negative contactor;

and under the condition that the ON gear self-checking has no fault, carrying out a charging process, closing the main control box high-voltage contactor in the all-in-one main negative contactor, and disconnecting the main control box high-voltage contactor from the all-in-one main negative contactor after charging is finished.

When the whole vehicle controller is in a START gear, performing insulation detection to detect whether the total voltage of the engine is in a range, if so, closing a main control box high-voltage contactor in an all-in-one main negative contactor by the whole vehicle controller, detecting whether the voltage of the rear end of a direct-current bus on the motor controller is in a rising state, and if the rising state exceeds the range, reporting a fault by the whole vehicle controller and disconnecting a pre-charging contactor and the main negative contactor; if rising as expected, starting a delay process when the voltage of the rear end of the direct current bus of the motor controller rises to be within +/-20V of the voltage of the front end, wherein the delay time is not less than 1 s; if the delay time is up, firstly sending a command for closing the main positive contactor, then detecting whether the main positive contactor is closed according to the state input of the main positive contactor, if the main positive contactor is not detected to be closed within 1 second after the command for closing the main positive contactor is sent, reporting a fault, and disconnecting the pre-charging contactor and the main negative contactor; if the main positive contactor is detected to be closed, a command is sent to open the pre-charging contactor; a precharge complete signal is then issued through the controller area network.

In the case where the load device at the back end is abnormal and the current continues to be unable to drop: and when the key returns to the ACC gear, the vehicle control unit sends a shutdown enabling signal to each controller, the contactors of each device are disconnected (if any) according to the working state fed back by each controller, and then the main positive contactor is disconnected when the current in the main loop fed back by the BMS is less than 30A (note: the BMS needs to be connected with the low-voltage storage battery for normal electricity). If after 3S there is still more than 30A of current in the main circuit, the main positive and negative contactors are immediately forced open.

In the process of pre-charging, if the ON gear signal disappears, the pre-charging is stopped, and the main negative is disconnected until the next power-ON process is effective;

during the power-off process, an ON gear signal appears, if the current main contactor is disconnected, the power-off process is continued until the next power-ON process is effective; if the current main contactor is not disconnected, keeping the high-voltage state;

high voltage is forbidden in the charging process; charging signals appear in the high-voltage state, the vehicle control unit enters a lower current range, the current to be discharged is reduced to a reasonable value, the main contactor is disconnected, the vehicle control unit sends a lower power command to the BMS through a message, and the BMS and the charging pile perform handshaking communication.

It is visible by above technical scheme, the utility model discloses following beneficial effect has:

1. the utility model discloses changed whole car control strategy and circuit, carried out the reorganization with inside configuration, guaranteed whole braking system's security.

2. The utility model discloses extensively be applicable to car and relevant trade thereof.

Drawings

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

Fig. 1 is a circuit diagram provided by the present invention.

Wherein: 1. a vehicle control unit; 2. a motor controller; 3. a battery management system; 4. a main control box high voltage contactor; 5. a master negative contactor in all in one; 6. a trigger; 7. a total positive electrode contactor;

Detailed Description

In order to make the technical solutions in the present invention better understood, the following description of the present invention with reference to the accompanying drawings will be made clear and fully descriptive of the technical solutions in the present invention, and it is obvious that the description is only a part of the present invention, not all of it. Based on the utility model provides a, all other that ordinary skilled in the art obtained under the prerequisite of not making the creative work all should belong to the scope protected by the utility model.

Referring to fig. 1, a whole vehicle control circuit of a new energy automobile includes a whole vehicle controller 1, a motor controller 2, a battery management system 3, a main control box high-voltage contactor 4, an all-in-one main negative contactor 5, a trigger 6 and a total positive contactor 7, the whole vehicle controller 1 is provided with an ON gear, an OFF gear, an ACC gear and a START gear, the whole vehicle controller 1 includes a low-voltage battery and a mechanical hand brake power main switch, and the whole vehicle controller 1 controls connection and disconnection between the motor controller 2, the battery management system 3, the main control box high-voltage contactor 4, the all-in-one main negative contactor 5, the trigger 6 and the total positive contactor 7.

And the vehicle control unit 1 controls the on-off of the main anode contactor 7.

The all-in-one main negative contactor 5 is connected with an air compressor, and the air compressor is driven by electricity.

When the ON gear is started, the motor controller 2 performs low-voltage self-checking to check whether a fault exists, and if the fault exists, the main positive contactor 7 is not attracted with the motor controller 2.

The battery management system 3 controls the main control box high-voltage contactor 4 and the all-in-one main negative contactor 5, the vehicle control unit 1 sends a power-ON instruction under the condition that the ON gear self-check has no fault, and the power-ON is carried out by closing the all-in-one main negative contactor 5;

when the vehicle control unit 1 sends a power-off command, the main control box high-voltage contactor 4 is disconnected with the all-in-one main negative contactor 5;

under the ON shelves self-checking does not have the trouble condition, carry out the charging process, with main control box high voltage contactor 4 in the main negative contactor 5 closure of unifying more, after the completion of charging, disconnection main control box high voltage contactor 4 and the main negative contactor 5's of unifying more connection.

When the vehicle control unit 1 is in a START gear, performing insulation detection to detect whether the total voltage of the engine is in a range, if the total voltage of the engine is in the range, detecting whether the voltage of the rear end of a direct current bus on the motor controller 2 is in a rising state after a main control box high-voltage contactor 4 is closed in an all-in-one main negative contactor 5 by the vehicle control unit 1, and if the rising state exceeds the range, reporting a fault by the vehicle control unit 1 and disconnecting a pre-charging contactor and the main negative contactor; if rising as expected, starting a delay process when the voltage of the rear end of the direct current bus of the motor controller 2 rises to be within +/-20V of the voltage of the front end, wherein the delay time is not less than 1 s; if the delay time is up, firstly sending a command for closing the main positive contactor, then detecting whether the main positive contactor is closed according to the state input of the main positive contactor, if the main positive contactor is not detected to be closed within 1 second after the command for closing the main positive contactor is sent, reporting a fault, and disconnecting the pre-charging contactor and the main negative contactor; if the main positive contactor is detected to be closed, a command is sent to open the pre-charging contactor; a precharge complete signal is then issued through the controller area network.

To sum up, compared with the prior art, the utility model, this technical scheme has changed whole car control strategy and circuit, has mainly changed the internal configuration of 5 unifications, and its inside is MCU, PDU, DC/DC, DC/AC, DC/AC to at the outside insulating detector that adds of 5 unifications. The electric air compressor can be installed, the whole vehicle adopts an air brake, and the braking safety performance of the whole vehicle is improved.

Claims

1. The utility model provides a whole car control circuit of new energy automobile, includes whole car controller (1), machine controller (2), battery management system (3), main control box high voltage contactor (4), unifies owner negative contactor (5), trigger (6) and total positive contactor (7) more, its characterized in that: the vehicle control unit (1) is provided with an ON gear, an OFF gear, an ACC gear and a START gear, the vehicle control unit (1) comprises a low-voltage storage battery and a mechanical hand brake power supply main switch, and the vehicle control unit (1) controls connection and disconnection among a motor controller (2), a battery management system (3), a main control box high-voltage contactor (4), an all-in-one main negative contactor (5), a trigger (6) and a main positive contactor (7).

2. The whole vehicle control circuit of the new energy vehicle according to claim 1, characterized in that: and the whole vehicle controller (1) controls the on-off of the main anode contactor (7).

3. The whole vehicle control circuit of the new energy vehicle according to claim 1, characterized in that: the all-in-one main negative contactor (5) is connected with an air compressor, and the air compressor is driven by electricity.

4. The whole vehicle control circuit of the new energy vehicle according to claim 1, characterized in that: when the ON gear is started, the motor controller (2) performs low-voltage self-checking to check whether a fault exists, and if the fault exists, the main positive contactor (7) and the motor controller (2) are not attracted.

5. The whole vehicle control circuit of the new energy vehicle according to claim 1, characterized in that: the battery management system (3) controls the main control box high-voltage contactor (4) and the all-in-one main negative contactor (5), the vehicle control unit (1) sends a power-ON instruction under the condition that the ON gear self-checking has no fault, and the power-ON is carried out by closing the all-in-one main negative contactor (5).

6. The whole vehicle control circuit of the new energy vehicle according to claim 1, characterized in that: when the vehicle control unit (1) sends a power-off command, the main control box high-voltage contactor (4) is disconnected with the all-in-one main negative contactor (5).

7. The whole vehicle control circuit of the new energy vehicle according to claim 1, characterized in that: and under the condition that the ON gear self-checking has no fault, the charging process is carried out, the main control box high-voltage contactor (4) is closed in the all-in-one main negative contactor (5), and after the charging is finished, the connection between the main control box high-voltage contactor (4) and the all-in-one main negative contactor (5) is disconnected.

8. The whole vehicle control circuit of the new energy vehicle according to claim 1, characterized in that: when the whole vehicle controller (1) is in a START gear, performing insulation detection to detect whether the total voltage of an engine is in a range, if the total voltage of the engine is in the range, closing a main control box high-voltage contactor (4) in an all-in-one main negative contactor (5) by the whole vehicle controller (1), detecting whether the voltage of the rear end of a direct-current bus on a motor controller (2) is in a rising state, and if the rising state exceeds the range, reporting a fault by the whole vehicle controller (1) and disconnecting a pre-charging contactor and the main negative contactor; if rising as expected, starting a delay process when the voltage of the rear end of the direct current bus of the motor controller (2) rises to be within +/-20V of the voltage of the front end, wherein the delay time is not less than 1 s; if the delay time is up, firstly sending a command for closing the main positive contactor, then detecting whether the main positive contactor is closed according to the state input of the main positive contactor, if the main positive contactor is not detected to be closed within 1 second after the command for closing the main positive contactor is sent, reporting a fault, and disconnecting the pre-charging contactor and the main negative contactor; if the main positive contactor is detected to be closed, a command is sent to open the pre-charging contactor; a precharge complete signal is then issued through the controller area network.