WO2020103274A1

WO2020103274A1 - Vehicle control unit for battery electric vehicle and vehicle control method

Info

Publication number: WO2020103274A1
Application number: PCT/CN2018/123115
Authority: WO
Inventors: 刘贵生; 安术平; 刘志钢
Original assignee: 北斗航天汽车（北京）有限公司
Priority date: 2018-11-23
Filing date: 2018-12-24
Publication date: 2020-05-28
Also published as: CN109435692A

Abstract

A vehicle control unit for a battery electric vehicle, comprising: a vehicle parameter acquisition module, configured to acquire vehicle control command parameters and a vehicle analog signal, and send same to a central processing module; and a central processing module, configured to edit a motor braking instruction according to the vehicle control command parameters and send same to a motor controller, determine, according to the vehicle analog signal, whether a motor braking instruction editing condition is satisfied, and if so, edit the motor braking instruction and send same to the motor controller. Also disclosed is a vehicle control method for a battery electric vehicle implemented on the basis of the vehicle control unit. The vehicle control unit and the control method therefor are able to acquire a plurality of signals, and be effectively compatible to a plurality of types of vehicles.

Description

Pure electric vehicle vehicle controller and vehicle control method

Technical field

The invention relates to the field of electric vehicle control, in particular to a pure electric vehicle vehicle controller and vehicle control method.

Background technique

Electric vehicles are one of the national new energy industry strategic research projects during the Tenth Five-Year Plan period. As a key component of electric vehicles, research on electric vehicle controllers is of great significance to seize the commanding heights of a new generation of electric vehicles and promote the leap-forward development of China's automobile industry. The electric vehicle controller is the core control component of the electric vehicle. It collects accelerator pedal signals, brake pedal signals, and signals from the battery management unit and motor control components. After making corresponding judgments, it controls the controllers of the lower-level actuators. Action to drive the car to run normally. Therefore, the electric vehicle controller is the brain of the electric vehicle, and its performance and algorithms directly affect the vehicle performance.

At present, the shortcomings of the vehicle controller for pure electric vehicles are: poor adaptability to vehicle models, and insufficient control flexibility; and the vehicle controller has always been in a working state, and energy consumption is large.

Therefore, a pure electric vehicle controller and vehicle control method are provided.

Summary of the invention

In view of the above problems, the present invention is proposed in order to provide a pure electric vehicle controller and vehicle control method that overcome the above problems or at least partially solve the above problems. It has strong driving ability, many driving paths, and a wide signal collection range. And other features, it can be effectively compatible with a variety of models, and also has a sleep function, which can directly reduce the energy consumption of the car in non-working state.

According to an aspect of the present invention, a vehicle controller for a pure electric vehicle is provided, including:

Car parameter collection module, used to collect car control command parameters and car analog signals, and send to the central processing module;

The central processing module is used to edit the motor brake command according to the parameters of the car control command and send it to the motor controller, and determine whether the conditions for editing the motor brake command are met according to the car analog signal. If so, the edit motor brake command is sent to the motor control Device.

Further, the automobile parameter acquisition module is electrically connected to the central processing module.

Further, the vehicle parameter collection module includes:

AD acquisition unit, electrically connected to the central processing module, used to collect automotive analog signals;

The data collection unit, electrically connected to the central processing module, is used to collect car control command parameters.

Further, the car analog signal includes accelerator pedal information and brake pedal information, used to determine whether the car decelerates or brakes, if so, edit the command to switch the motor of the car to the power generation state, and send it to the motor controller to send part of the car The kinetic energy is converted into electrical energy and fed back to the power battery to realize braking and energy recovery and reuse.

Further, the above-mentioned pure electric vehicle controller also includes: a high-end drive switch output and a low-end drive switch output, electrically connected to the central processing module, and used to output a control signal of a peripheral switch.

Further, the above-mentioned pure electric vehicle controller also includes: a communication module, which is electrically connected between the central processing module and the battery management system, between the central processing module and the motor controller, and between the central processing module and the automobile instrument respectively , Used for communication of vehicle transmission data with battery management system, motor controller and automobile instrument.

Further, the communication module includes a CAN bus and a LIN bus.

Further, the pure electric vehicle vehicle controller also includes: a pure electric vehicle vehicle controller multi-way wake-up circuit, the pure electric vehicle vehicle controller multi-way wake-up circuit includes a wake-up module for waking up the power control module, The wake-up filter module, the power control module and the power supply module for controlling and controlling the power supply of the vehicle-mounted controller, and the wake-up module, the wake-up filter module, the power control module and the power supply module are electrically connected in sequence.

Further, the power supply control module includes a power supply chip for controlling the power supply of the vehicle-mounted controller, the wake-up module includes a CAN bus wake-up circuit, a capacitor charging control power-on wake-up circuit, a controller control power-on wake-up circuit, and a power supply power-on wake-up circuit, and a power supply chip The input terminal of the enable signal is electrically connected to the reverse terminal of a wake-up diode, and the positive terminal of each wake-up diode is respectively connected to the CAN bus wake-up circuit, the capacitor charging control power-on wake-up circuit, the controller control power-on wake-up circuit and the power supply The electrical wake-up circuit is electrically connected; the power supply output end of the power supply chip is electrically connected to the power supply input end of the power supply module, the power supply output end of the power supply module is used to supply power to the vehicle controller, and the power supply start end of the power chip and the first capacitor of the start capacitor The board is electrically connected, and the second capacitor board of the starting capacitor is electrically connected to the power supply output end of the power chip.

According to another aspect of the present invention, there is provided a pure electric vehicle vehicle control method based on the vehicle controller, including the following steps:

Collect car control command parameters and car analog signals, and send to the central processing module;

Edit the motor brake command according to the car control command parameters and send it to the motor controller, and determine whether the conditions for editing the motor brake command are met according to the car simulation signal. If so, edit the motor brake command and send it to the motor controller.

Compared with the prior art, the present invention has the following advantages:

1. The pure electric vehicle vehicle controller and vehicle control method of the present invention collect vehicle control command parameters and vehicle analog signals, and edit the motor braking command according to the vehicle control command parameters to send to the motor controller, and judge according to the vehicle analog signals Whether the conditions for editing the motor brake command are met, and if so, the motor brake command is edited and sent to the motor controller, which can collect a variety of signals and can be effectively compatible with a variety of vehicle models;

2. The pure electric vehicle controller and vehicle control method of the present invention include high-end drive switch output and low-end drive switch output, which are used to output the control signal of the peripheral switch, and have the characteristics of strong driving ability and many driving paths ;

3. The pure electric vehicle controller and vehicle control method of the present invention include a wake-up module for waking up the power control module, a wake-up filter module, a power control module and a power supply module for controlling the power supply of the on-board controller, and have sleep The function can directly reduce the energy consumption of the car in a non-working state.

BRIEF DESCRIPTION

The present invention will be further described below with reference to the drawings and embodiments.

1 is a block diagram of a pure electric vehicle controller of the present invention;

2 is a block diagram of a multi-way wake-up circuit of a pure electric vehicle controller of the present invention;

3 is a circuit diagram of a multi-way wake-up circuit of a pure electric vehicle controller of the present invention;

4 is a circuit diagram of the CAN bus wake-up circuit of the present invention;

5 is a schematic diagram of the application of the vehicle controller of the pure electric vehicle of the present invention;

6 is a schematic diagram of the working principle of the vehicle controller of the pure electric vehicle of the present invention;

7 is a flowchart of a control method of a pure electric vehicle according to the present invention.

detailed description

Hereinafter, exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

Those skilled in the art can understand that unless specifically stated, the singular forms "a", "an", "" and "the" as used herein may also include the plural form. It should be further understood that the word "comprising" used in the description of the present invention refers to the presence of features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, Steps, operations, elements, components and / or their groups.

Those skilled in the art can understand that unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as those generally understood by those of ordinary skill in the art to which this invention belongs. It should also be understood that terms such as those defined in a general dictionary should be understood to have a meaning consistent with the meaning in the context of the prior art, and unless specifically defined, they will not be idealized or overly formal. To explain.

Focusing on the four core goals of "efficiency, energy saving, reliability, and safety", ten functions such as energy management, torque coordination, fault handling, and safety protection are developed for the pure electric vehicle controller of the present invention to realize vehicle controller data exchange , Safety management, driver intention interpretation, energy flow management functions.

FIG. 1 is a block diagram of a pure electric vehicle controller of the present invention. Referring to FIG. 1, the pure electric vehicle controller of the present invention includes:

The central processing module can be MC9S12XDP512 type chip.

The pure electric vehicle vehicle controller of the present invention collects vehicle control command parameters and vehicle analog signals, edits the motor brake command according to the vehicle control command parameters and sends it to the motor controller, and judges whether the motor brake command editing is satisfied according to the vehicle analog signal If it is, edit the motor braking command and send it to the motor controller, which can collect a variety of signals and can be effectively compatible with a variety of models.

Referring to Figure 1, the automobile parameter acquisition module includes:

The data acquisition unit is electrically connected to the central processing module through the SPI (Serial Peripheral Interface) bus, which is used to collect car control command parameters.

The AD acquisition unit can be the LW MA7108C model collector. The data collection unit can be the LW S7244 type collector.

Further, the vehicle analog signal includes accelerator pedal information and brake pedal information, which is used to judge whether the car decelerates or brakes. The kinetic energy is converted into electrical energy and fed back to the power battery to realize braking and energy recovery and reuse.

Referring to FIG. 1, the above-mentioned pure electric vehicle controller also includes: a high-end drive switch output and a low-end drive switch output, electrically connected to the central processing module, and used to output a control signal for a peripheral switch.

High-end drive switch output and low-end drive switch output adopt H-bridge drive chip IR2110.

The pure electric vehicle controller of the present invention includes a high-end drive switch output and a low-end drive switch output, which is used to output a control signal of a peripheral switch, and has the characteristics of strong driving capacity and a large number of driving paths.

Referring to FIG. 1, the above-mentioned pure electric vehicle controller also includes: a communication module electrically connected between the central processing module and the battery management system, between the central processing module and the motor controller, and between the central processing module and the automobile instrument It is used for communication of vehicle transmission data with battery management system, motor controller and automobile instrument. Among them, the communication module includes CAN bus and LIN bus.

Further, the above-mentioned pure electric vehicle controller also includes: a display driver, which is used to receive the status information of each vehicle system detected by the sensor collected through the CAN bus, and drive the display to display the status information.

Further, the central processing module is also used to monitor the status information of each system of the automobile, perform fault diagnosis, and send the fault diagnosis information to the display.

Further, the above-mentioned pure electric vehicle controller further includes: a memory, which is electrically connected to the central processing module through an IIC (Inter-Integrated Circuit, integrated circuit) bus, and is used to store a fault code for viewing during maintenance. The memory may be a ferroelectric memory.

The above-mentioned pure electric vehicle vehicle controller, between the central processing module and the battery management system, between the central processing module and the motor controller, and between the central processing module and the car instrument, also includes: Road wake-up circuit, see FIG. 2, the pure electric vehicle vehicle controller multi-way wake-up circuit includes a wake-up module for waking up the power control module, a wake-up filter module, a power control module and a power supply module for controlling and controlling the power supply of the on-board controller, The wake-up module, the wake-up filter module, the power control module and the power supply module are electrically connected in sequence.

The pure electric vehicle controller of the present invention includes a wake-up module for waking up the power control module, a wake-up filter module, a power control module and a power supply module for controlling the power supply of the on-board controller, and has a sleep function, which can directly reduce the vehicle Energy consumption in the non-working state.

As shown in FIGS. 2 and 3, the power control module includes a power chip TPS5420 for supplying power to the vehicle controller, and the enable signal input terminal 5 of the power chip and a wake-up diode (D4, D5, D6, D7, D8, D9) The reverse terminal is electrically connected. The positive terminal of each wake-up diode is electrically connected to the CAN bus wake-up circuit, the capacitor charging control power-on wake-up circuit, the controller control power-on wake-up circuit, and the power-on power-on wake-up circuit; The power supply output terminal 8 is electrically connected to the power supply input terminal (VCC) of the power supply module. The power supply output terminal of the power supply module is used to supply power to the vehicle controller. The power supply start terminal 1 of the power chip is electrically connected to the first capacitor plate of the start capacitor C54 , The second capacitor plate of the starting capacitor is electrically connected to the power supply output end of the power chip. The power supply module includes a power supply diode D3, a power supply inductor L3, and a power supply filter circuit. The first end of the power supply inductor is electrically connected to the power supply output end of the power supply chip, the second end of the power supply inductor is electrically connected to the input end of the power supply filter circuit, and the power supply filter circuit The output terminal is electrically connected to the power supply output terminal of the power supply module. The power supply filter circuit includes a plurality of power supply filter capacitors (C51, C52, C53, and C57) arranged in parallel. The first capacitor plate of each power supply filter capacitor is electrically connected to the second end of the power supply inductance. The second capacitor plates are all grounded. The multi-channel wake-up circuit of the pure electric vehicle controller also includes a wake-up filter module. The wake-up filter module includes an enable filter capacitor C59, an enable filter resistor R85 and an enable adjustable resistor VDR1, and the first capacitor plate that enables the filter capacitor C59 It is electrically connected to the enable signal input terminal of the power chip, the second capacitor plate of the enable filter capacitor C59 is grounded, the enable filter resistor R85 and the enable adjustable resistor VDR1 are connected in parallel with the enable filter capacitor. The reference signal terminal 4 of the power chip is electrically connected to the VCC through the voltage dividing resistors (R82, R83, and R84); the multi-way wake-up circuit of the pure electric vehicle controller also includes multiple wake-up resistors (R86, R87, R88, R90, R91 , R92), the first end of each wake-up resistor is electrically connected to the positive end of each wake-up diode, and the second end of each wake-up resistor is respectively connected to the CAN bus wake-up circuit, capacitor charging control power-on wake-up circuit, and controller The power-on wake-up circuit is controlled to be electrically connected to the power-on wake-up circuit. The number of CAN bus wake-up circuits is multiple. The number of capacitor charging control wake-up circuits is multiple.

4, the CAN bus wake-up circuit includes a bus chip, and the wake-up signal output terminal of the bus chip is electrically connected to the enable signal input terminal of the power chip. The bus chip wake-up signal input terminal of the bus chip is electrically connected to the bus chip wake-up filter module output terminal, and the bus chip wake-up filter module's input terminal is used to electrically connect the bus chip wake-up signal. The bus chip wake-up filter module includes a transistor Q1. The first end of the transistor is electrically connected to the common connection point of the first resistor R1 and the second resistor R2, and the other end of the second resistor is electrically connected to the bus chip wake-up signal input terminal of the bus chip. The other end of the first resistor is electrically connected to the vehicle power supply; the second end of the transistor is electrically connected to the first end of the third resistor R3, and the second end of the third resistor is used to electrically connect to the bus chip wake-up signal; the third transistor The terminal is grounded; it also includes a fourth resistor R4, the first terminal of the fourth resistor is electrically connected to the second terminal of the third resistor, and the second terminal of the fourth resistor is grounded. Among them, CAN1_TXD, CAN1_RXD are the signal transmitter and signal receiver of CAN analysis; CAN1_EN is the control enable terminal of the analysis chip, and CAN1_INH is the wake-up signal output.

In this embodiment, the multi-channel wake-up circuit of the pure electric vehicle controller includes a power chip for powering the on-board controller. The enable signal input terminal 5 of the power chip is electrically connected to the reverse terminal of a wake-up diode, respectively The positive end of the wake-up diode is electrically connected to the CAN bus wake-up circuit, the capacitor charging control power-on wake-up circuit, the controller control power-on wake-up circuit and the power-on power-on wake-up circuit; the power supply output terminal 8 of the power chip and the power input of the power supply module The terminal is electrically connected. The power supply output end of the power supply module is used to supply power to the vehicle controller. The power supply start end 1 of the power chip is electrically connected to the first capacitor plate of the start capacitor, and the second capacitor plate of the start capacitor and the power supply output of the power chip The terminal is electrically connected; by setting a multi-way wake-up circuit, the vehicle controller is dormant when it is idle, which has the effect of reducing power consumption, enhances the efficiency of the use of vehicle energy, and makes the vehicle controller suitable for a variety of vehicle models , More widely used.

In this embodiment, a multi-channel wake-up circuit of a pure electric vehicle controller. The CAN bus wake-up circuit includes a bus chip. The wake-up signal output terminal of the bus chip is electrically connected to the enable signal input terminal of the power chip; the bus chip wake-up signal of the bus chip The input end is electrically connected to the output end of the bus chip wake-up filter module. The input end of the bus chip wake-up filter module is used to electrically connect the bus chip wake-up signal; by setting the bus chip wake-up filter module, the external noise signal is effectively suppressed and the wake-up circuit is improved Anti-interference ability.

In this embodiment, the multi-channel wake-up circuit of the pure electric vehicle controller is based on a control circuit of the vehicle controller to the power consumption of the vehicle. When the vehicle is not working, the vehicle controller is adopted Going to sleep, a mode of low power consumption, helps reduce unnecessary waste of vehicle energy.

In this embodiment, the pure electric vehicle vehicle controller multi-way wake-up circuit has two CAN bus communication wake-up functions, the core chip is TJA1041, and the TJA1041 is powered by the 12V power supply constant power, so the TJA1041 has been in the power supply working state, and the central processing module The working state of TJA1041 can be controlled by controlling STB pin and EN pin. The specific logic control method is as follows. When TJA1041 is in sleep state, INH is low, when TJA1041 is in normal working state, INH is high, pass The CAN1_INH signal can control the enable pin (5 feet, ENA pin) of the power chip TPS5420, thereby controlling whether the vehicle controller + 5V voltage is powered, so as to achieve the purpose of reducing power consumption. There are three ways to wake up the TJA1041 from sleep or standby mode: 1. Local wake-up through the edge of pin WAKE, any transition edge of pin WAKE will generate wake-up event, in order to suppress external noise pin WAKE integrates a filter This means that the later state on pin WAKE will be valid for a certain period of time, if the high level on pin WAKE continues for at least tWAKE pin WAKE provides an internal pull-up to VBAT, if the low power on pin WAKE The level continues for at least tWAKE and there is an internal pull down to GND. 2. Wake up by mode conversion, or by setting pin INH to high level when switching to normal mode, this is useful for applications where the central processing module is continuously powered on. 3. Wake-up source identification, TJA1041 can recognize the local wake-up event of pin WAKE or the wake-up source that wakes up through the dominant bus state. If the wake-up source of pin WAKE is an edge, the wake-up source flag is set, if it enters from other modes Normal mode wakeup source can read wakeup on pin / ERR.

In this embodiment, the pure electric vehicle vehicle controller multi-way wake-up circuit, other ways of wake-up, see Figure 3, respectively CC1 charge control power-on, CC2 charge control power-on, KL15 control, power-on PWR_ON, wake-up core The principle is similar to CAN bus wake-up. By giving the enable pin (5 feet, ENA pin) of the power chip TPS5420 a + 12V high level, the vehicle controller is provided with + 5V power to achieve the purpose of waking up.

In this embodiment, the pure electric vehicle controller multi-way wake-up circuit, the core circuit to achieve multi-way separate wake-up is the clever use of the wake-up diode MMSD4148, as long as one of the 6-way wake-up circuit is high, the diode is turned on , Trigger wake-up, and the wake-up signals of each channel do not affect each other.

5 is a schematic diagram of the application of the vehicle controller of the pure electric vehicle of the present invention. As shown in FIG. 5, the vehicle controller (Vehicle Control Unit, VCU) communicates with the battery management system, the motor controller and the vehicle instrument through the CAN bus , And collect accelerator pedal information and brake pedal information, receive switch signals, such as charge switch signal, key switch signal, gear switch signal and brake switch signal, receive the frequency detection signal to the vacuum controller, according to the received information and The signal generates control commands, drives DCDC (voltage conversion) enable, motor speed adjustment, water pump speed regulation, fan switch, reverse light switch, etc. through the high-end drive switch and low-end drive switch.

6 is a schematic diagram of the working principle of the vehicle controller of a pure electric vehicle of the present invention. Referring to FIG. 6, the vehicle controller of a pure electric vehicle includes a CAN (Controller Area Network) bus, memory, high-end drive, and low-end drive , AD (Analog-to-Digital, modulus) acquisition, high-end signal and low-end signal acquisition.

1. The CAN bus is used for data transmission with BMS (BATTERY MANAGEMENT SYSTEM, battery management system), MCU (Microcontroller Unit, micro control unit), instrument, and has a wake-up function.

2. The memory is mainly used to store relevant data information.

3. High-end drive and low-end drive are mainly used for the control of peripheral switches.

4. AD acquisition is used for analog signal acquisition such as accelerator pedal and brake pedal.

5. High-end signal and low-end signal acquisition are used for automobile related control commands.

The vehicle controller functions developed in this project include: drive torque control, optimal control of braking energy, vehicle energy management, CAN network maintenance and management, fault diagnosis and processing, vehicle status monitoring, etc.

1) Vehicle drive control

According to the driver's driving requirements, vehicle status, etc., after analysis and processing, it sends instructions to the motor controller to meet the driving conditions. Including starting, forward, reverse, feedback braking, fault detection and processing and other working conditions.

2) Vehicle energy optimization management

Through the coordination and management of the electric vehicle's motor drive system, battery management system, transmission system and other on-board energy and power systems (such as air conditioning), the best energy utilization rate can be obtained.

3) Network management

The vehicle controller as an information control center is responsible for organizing information transmission, network status monitoring, network node management and other functions, network fault diagnosis and processing.

4) Feedback brake control

According to the brake pedal and accelerator pedal information, vehicle driving status information, and battery status information, a braking command is issued to the motor controller, and part of the energy is recovered without affecting the braking performance of the original vehicle.

5) Fault diagnosis and treatment

Continuously monitor the vehicle's electronic control system for fault diagnosis. Store the fault code for viewing during maintenance. The fault indicator indicates the fault category and some fault codes. According to the content of the fault, the corresponding safety protection treatment shall be carried out in time. For less serious faults, you can do "limp home."

6) Vehicle status monitoring and display

The main controller detects the vehicle status and the status information of each subsystem through the sensor and CAN bus, drives the display instrument, and displays the status information and fault diagnosis information through the display instrument. The display content includes: vehicle speed, mileage, motor speed, temperature, battery power, voltage, current, fault information, etc.

Based on the functional analysis of the main controller of pure electric cars, the central processing module is selected as the processor, and the main controller is divided into the following modules according to the functions: central processing module module, data acquisition module (analog and digital) , Power drive and protection module, power supply module, communication module (CAN bus and LIN bus), instrument drive and display module, etc.

The hardware architecture of the pure electric vehicle controller of the present invention is more conducive to the expansion of software functions, such as energy recovery, fault diagnosis and other related functions.

The digital signals such as the start key, charging switch, air conditioning switch, vehicle mode, gear position and braking position are usually subjected to anti-shake, isolation, level conversion and integer processing.

7 is a flowchart of a method for controlling a pure electric vehicle according to the present invention. Referring to FIG. 7, a method for controlling a pure electric vehicle based on the vehicle controller provided by the present invention includes the following steps:

The pure electric vehicle control method of the present invention collects vehicle control command parameters and vehicle analog signals, edits the motor brake command according to the vehicle control command parameters and sends it to the motor controller, and judges whether the motor brake command editing is satisfied according to the vehicle analog signal Conditions, if it is, edit the motor braking command and send it to the motor controller, which can collect a variety of signals and can be effectively compatible with a variety of models;

The pure electric vehicle control method of the present invention includes a high-end drive switch output and a low-end drive switch output, which is used to output a control signal of a peripheral switch, and has the characteristics of strong driving capacity and a large number of driving paths;

The pure electric vehicle control method of the present invention includes a wake-up module for waking up the power control module, a wake-up filter module, a power control module and a power supply module for controlling and controlling the power supply of the on-board controller, has a sleep function, and can directly reduce the vehicle Energy consumption in the non-working state.

For the method embodiment, since it is basically similar to the device embodiment, the description is relatively simple, and the relevant part can be referred to the partial description of the device embodiment.

For the sake of simple description, the method embodiments are described as a series of action combinations, but those skilled in the art should know that the embodiments of the present invention are not limited by the described sequence of actions, because according to the embodiments of the present invention Some steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the involved actions are not necessarily required by the embodiments of the present invention.

The above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, persons of ordinary skill in the art should understand that it can still be used for the foregoing embodiments. The recorded technical solutions are modified, or some of the technical features are equivalently replaced; and these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

A vehicle controller for a pure electric vehicle is characterized by comprising:

Car parameter collection module, used to collect car control command parameters and car analog signals, and send to the central processing module;

The central processing module is used to edit the motor brake command according to the parameters of the car control command and send it to the motor controller, and determine whether the conditions for editing the motor brake command are met according to the car analog signal. If so, the edit motor brake command is sent to the motor control Device.
The pure electric vehicle controller of claim 1, wherein the vehicle parameter collection module is electrically connected to the central processing module.
The pure electric vehicle controller of claim 2, wherein the vehicle parameter collection module includes:

AD acquisition unit, electrically connected to the central processing module, used to collect automotive analog signals;

The data collection unit, electrically connected to the central processing module, is used to collect car control command parameters.
The vehicle controller of a pure electric vehicle according to claim 3, wherein the vehicle analog signal includes accelerator pedal information and brake pedal information for judging whether the car is decelerating or braking. The power generation status command is sent to the motor controller to convert part of the kinetic energy of the car into electrical energy and feed it back to the power battery to achieve braking and energy recovery and reuse.
The pure electric vehicle controller of claim 3, further comprising: a high-end drive switch output and a low-end drive switch output, electrically connected to the central processing module, and used to output a control signal for a peripheral switch.
The pure electric vehicle controller according to claim 5, further comprising: a communication module electrically connected between the central processing module and the battery management system, between the central processing module and the motor controller, the central Between the processing module and the car instrument, it is used to communicate with the battery management system, motor controller, and car instrument for car transmission data.
The pure electric vehicle controller according to claim 6, wherein the communication module includes a CAN bus and a LIN bus.
The pure electric vehicle vehicle controller according to claim 2, further comprising: a pure electric vehicle vehicle controller multiple wake-up circuit, the pure electric vehicle vehicle controller multiple wake-up circuit includes a wake-up circuit The wake-up module, the wake-up filter module of the power control module, the power control module and the power supply module for controlling and controlling the power supply of the vehicle controller, the wake-up module, the wake-up filter module, the power control module and the power supply module are electrically connected in sequence.
The pure electric vehicle controller according to claim 8, wherein the power control module includes a power chip for controlling the power supply of the vehicle controller, the wake-up module includes a CAN bus wake-up circuit, a capacitor charging control power-on wake-up circuit, The controller controls the power-on wake-up circuit and the power-on wake-up circuit. The enable signal input terminal of the power chip is electrically connected to the reverse terminal of a wake-up diode, and the positive terminal of each wake-up diode is respectively connected to the CAN bus wake-up circuit and capacitor charging Control the power-on wake-up circuit, the controller controls the power-on wake-up circuit and the power-on wake-up circuit to be electrically connected; the power supply output end of the power chip is electrically connected to the power supply input end of the power supply module, and the power supply output end of the power supply module is used to control the entire vehicle The power supply start end of the power chip is electrically connected to the first capacitor plate of the start capacitor, and the second capacitor plate of the start capacitor is electrically connected to the power supply output end of the power chip.
A pure electric vehicle control method based on a vehicle controller according to claim 1, characterized in that it includes the following steps:

Collect car control command parameters and car analog signals, and send to the central processing module;

Edit the motor brake command according to the car control command parameters and send it to the motor controller, and determine whether the conditions for editing the motor brake command are satisfied according to the car simulation signal.