CN107804176A - A kind of control system and its control method based on new energy vehicle auxiliary braking - Google Patents

A kind of control system and its control method based on new energy vehicle auxiliary braking Download PDF

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Publication number
CN107804176A
CN107804176A CN201711043895.7A CN201711043895A CN107804176A CN 107804176 A CN107804176 A CN 107804176A CN 201711043895 A CN201711043895 A CN 201711043895A CN 107804176 A CN107804176 A CN 107804176A
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module
circuit
load
main control
temperature
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CN107804176B (en
Inventor
李奇峰
黄国宁
张学申
郭玉峰
马洲
马向阳
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Cama Luoyang Electromechanic Co Ltd
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Cama Luoyang Electromechanic Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L7/00—Electrodynamic brake systems for vehicles in general
    • B60L7/24—Electrodynamic brake systems for vehicles in general with additional mechanical or electromagnetic braking
    • B60L7/26—Controlling the braking effect
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L7/00—Electrodynamic brake systems for vehicles in general
    • B60L7/10—Dynamic electric regenerative braking
    • B60L7/18—Controlling the braking effect
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/16—Information or communication technologies improving the operation of electric vehicles

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

A kind of control system based on new energy vehicle auxiliary braking; including main control module, digital signal processing module, positive-negative power module, A/D acquisition modules, CAN communication module, signal driver module, drive module, Drive Protecting Circuit, upper electric pre-charge circuit and fault secure circuit; modules cooperate; each circuit normal work, logic is close, fast response time, control accuracy are high；The control method of the present invention; including master control program and sub- control program; including normal mode of operation and troubleshooting pattern; include level fault diagnosis and temperature fault diagnosis under troubleshooting pattern; it ensure that on the premise of not influenceing former car braking; make up and brake the shortcomings that insufficient under specified conditions; it ensure that each circuit is normal, efficient operation; improve retardation efficiency, widen application conditions; battery can effectively be protected, extend battery service life; the abrasion of vehicle main brake is reduced, realizes vehicle safety, reliable, fast braking.

Description

A kind of control system and its control method based on new energy vehicle auxiliary braking
Technical field
It is auxiliary based on new energy vehicle more specifically to one kind the present invention relates to the control technology field of vehicle braking Help the control system and its control method of braking.
Background technology
It is well known that becoming increasingly conspicuous with world energy sources crisis and environmental issue, countries in the world are got over to new energy vehicle Hair is paid attention to.In recent years, new energy car had obtained popularization and use energetically in China, at present mainly with hybrid power and pure electronic Based on vehicle, it is characterized in motor as its part or all of power source.In accelerator, motor can provide required dynamic Power source, and in braking procedure, it is operated in generator mode, is that electrokinetic cell or electric capacity charge, and produces reactive torque, real Existing electric regenerative braking.Braking causes battery to be likely to occur full power state for a long time, or winter battery-active is weaker, and battery capacity declines Subtract, due to the limitation charged to battery, additional braking force can weaken or interrupt, while frequently longevity of the feedback charging to battery Life can have a certain impact.Under given conditions, for example, battery electric quantity is more or full power state under, auxiliary braking can not meet GB 12676 《Brake system of car properity and test method》And CJ/T230《City bus retarder braking ability will Ask and test method》Specified in II A type test requirements documents.
In the prior art, the control system and control method about vehicle auxiliary braking are also slightly inadequate.For example, the patent No. A kind of motor vehicle braking system based on super capacitor is disclosed for CN203157745U utility model, it mainly provides two kinds The load of excess charge is consumed, one kind is that warm-air drier, another kind are resistance, and be switched on or switched off by two Simple switchs with reality The consumption of existing unnecessary electricity, but degree of control is not high, it is impossible to the quality of detection load in time, easily break down, and for Failure is unable to real-time diagnosis, processing, and the service life of battery is short.A kind of system of Patent No. CN103532365B disclosure of the invention Moving cell, it is main to introduce how to suppress methods of the high-power switch tube IGBT in peak voltage caused by shutdown moment, to ensure Circuit can be with normal work, and it relates generally to the technical field of current transformer or frequency converter braking, and the frequency of current transformer or frequency converter Numerous conversion, cause that battery life can not be ensured, along with the abrasion of vehicle main brake, security reduces.
The content of the invention
In view of this, to solve above-mentioned the deficiencies in the prior art, it is an object of the invention to provide one kind to be based on new energy The control system of vehicle auxiliary braking, modules cooperate, each circuit normal work, logic is close, fast response time, Control accuracy is high, more automation and intelligent, convenience and high-efficiency；Present invention also offers one kind based on new energy vehicle auxiliary system The control method of dynamic control system, it is ensured that on the premise of not influenceing former car braking, make up and deficiency is braked under specified conditions Shortcoming, it is ensured that each circuit is normal, efficient operation, improves retardation efficiency, widens application conditions, can effectively protect battery, Extend battery service life, reduce the abrasion of vehicle main brake, realize vehicle safety, reliable, fast braking, the present invention is especially It is adapted to the realization of plug-in hybrid and pure electric vehicle auxiliary braking, relevant national standard can be better met to II A types The requirement of experiment, it is more suitable for promoting on a large scale.
To achieve the above object, the technical solution adopted in the present invention is：
A kind of control system based on new energy vehicle auxiliary braking, including it is main control module, digital signal processing module, positive and negative Power module, A/D acquisition modules, CAN communication module, signal driver module, drive module, Drive Protecting Circuit, upper electric preliminary filling Circuit and fault secure circuit, the digital signal processing module, positive-negative power module, A/D acquisition modules, CAN communication mould Block, signal driver module, drive module, Drive Protecting Circuit, upper electric pre-charge circuit, fault secure circuit respectively with the master Control module connects；
The A/D acquisition modules, CAN communication module, signal driver module, upper electric pre-charge circuit, fault secure circuit, A/D Acquisition Circuit is connected with the digital signal processing module respectively, the signal driver module, fault secure circuit respectively with institute The connection of positive-negative power module is stated, the signal driver module is connected with the fault secure circuit；
The drive module is connected by the signal driver module with the digital signal processing module, the drive module with Drive Protecting Circuit is in parallel, and load resistance R and A/D collection electricity are set between the drive module and the upper electric pre-charge circuit Road, the A/D Acquisition Circuits, upper electric pre-charge circuit are connected with the A/D acquisition modules respectively.
Further, the A/D acquisition modules are adopted including braking signal collection unit, load parameter collecting unit and temperature Collect unit, A/D acquisition channels, the brake signal are set between the A/D acquisition modules and the digital signal processing module Collecting unit is used for detection and collection vehicle brake pedal status, tramples depth value, and the load parameter collecting unit is used for DC bus-bar voltage, load current are gathered, the temperature collecting cell is used to gather the signal driver module internal temperature, born Carry resistance R air outlet temperatures and system radiating device temperature.
Further, the drive module is IGBT drive module.
Further, the signal driver module is IGBT special driving chips.
Further, the Drive Protecting Circuit is RCD protection circuits.
Further, the upper electric pre-charge circuit includes major loop and branch road, and current-limiting resistance is provided with the branch road.
A kind of control method of control system based on new energy vehicle auxiliary braking of the present invention, comprises the following steps：
Step 1：By system electrification and initialized；
Step 2：Setup parameter：Busbar voltage preset value is set as V0, maximum working voltage Ve, initial load electric current be I0、 Load current is I, Realtime Alerts electric current is Ie, load temperature preset value be T0, load temperature alarming value be T1, load temperature mistake Calorific value is T2, T0<T1<T2；
Step 3：Delay carries out A/D collections and conversion, the letter that the A/D Acquisition Circuits will collect after waiting until voltage stabilization Number it is transferred to digital signal processing module, A/D acquisition modules respectively, the temperature collecting cell detection in the A/D acquisition modules It is T to the signal driver module internal temperaturea, load resistance R air outlet temperatures be Tb, system radiating device temperature be Tc；
Step 4：A/D collections finish, and connect the upper electric pre-charge circuit, and the A/D acquisition modules continue state inspection Survey, if the A/D acquisition modules detect that busbar voltage V reaches preset value V0, then the main control module, which controls, goes up electric preliminary filling Circuit disconnects, and then connects major loop；
Step 5：Load parameter collecting unit detection DC bus-bar voltage V, initial load electric current in the A/D acquisition modules I0If V=V0、I0=0, then fault-free, into normal mode of operation, and according to normal mode of operation, export theoretical control signal, Control accuracy is adjusted, data is sent, preserves OBD codes；Otherwise, into troubleshooting pattern.
Further, the troubleshooting pattern includes level fault diagnosis and temperature fault diagnosis, the level fault Diagnosis, comprises the following steps：
A1：The main control module controls the A/D acquisition modules to carry out cycle detection to busbar voltage V and load current I, if V>VeOr I>Ie, then main control module disconnects major loop, transmission OBD failure codes, and records number of stoppages N, while is transferred to step A2；Otherwise, judge whether drive module function is normal, if drive module function is normal, is transferred to step A3, is otherwise transferred to step A4；
A2：If number of stoppages N>N0, then main control module thoroughly disconnect major loop, send OBD failure codes, otherwise, return to step Rapid A1, and carry out electricity precharge；
A3：If the drive module function is normal, diagnosed into temperature fault, otherwise, main control module disconnects major loop, hair Send OBD failure codes；
A4：If detecting drive module dysfunction, main control module control disconnects major loop, and sends OBD failure codes；
The temperature fault diagnosis, comprises the following steps：
S1：The main control module controls the A/D acquisition modules to load temperature TbCycle detection is carried out, if Tb≥T0, then lead Control module sends instruction：Acousto-optic warning is only sent, while sends OBD failure codes, is then transferred to step S2；Otherwise, enter Standby mode；
S2：Judge TbWhether T is metb≥T1If Tb≥T1, then main control module send instruction：Acousto-optic warning is sent, reduces work( Rate exports, while sends OBD failure codes, is then transferred to step S3, otherwise, keeps former output state；
S3：Judge TbWhether T is metb≥T2If Tb≥T2, then main control module send instruction：Acousto-optic warning is sent, closes control System load output, while send, store OBD failure codes.
Further, the normal mode of operation is for vehicle CAN communication control model or unit operation pattern or with reference to BMS The operational mode of system.
The beneficial effects of the invention are as follows：
A kind of control system based on new energy vehicle auxiliary braking, including it is main control module, digital signal processing module, positive and negative Power module, A/D acquisition modules, CAN communication module, signal driver module, drive module, Drive Protecting Circuit, upper electric preliminary filling Circuit and fault secure circuit, modules cooperate, each circuit normal work, logic is close, fast response time, control Precision processed is high, on the premise of former car braking is not influenceed, can effectively make up under specified conditions and brake the shortcomings that insufficient, more automatically Change and intelligent, convenience and high-efficiency；
A kind of control method of control system based on new energy vehicle auxiliary braking of the present invention, including master control program and son Control program, including normal mode of operation and troubleshooting pattern, level fault diagnosis and temperature are included under troubleshooting pattern Fault diagnosis, and generally in the state of continuous cycle detection, pass through the control program of accurate optimization, modules, electricity The division of labor on road, unit coordinates, it is ensured that and on the premise of not influenceing former car braking, make up and brake the shortcomings that insufficient under specified conditions, It ensure that each circuit is normal, efficient operation, improve retardation efficiency, widen application conditions, can effectively protect battery, extend electricity Pond service life, the abrasion of vehicle main brake is reduced, realize vehicle safety, reliable, fast braking, disclosure is particularly well suited to insert The realization of electric-type hybrid power and pure electric vehicle auxiliary braking, it can better meet what relevant national standard was tested II A types It is required that it is more suitable for promoting on a large scale.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the system principle diagram of the present invention；
Fig. 2 is the main control flow chart of the present invention；
Fig. 3 is level fault diagnostic flow chart；
Fig. 4 is temperature fault diagnostic flow chart；
Marked in figure：1st, main control module, 2, digital signal processing module, 3, positive-negative power module, 4, A/D acquisition modules, 401st, braking signal collection unit, 402, load parameter collecting unit, 403, temperature collecting cell, 5, CAN communication module, 6, letter Number drive module, 7, drive module, 8, Drive Protecting Circuit, 9, upper electric pre-charge circuit, 10, fault secure circuit, 11, A/D Acquisition Circuit.
Embodiment
Specific embodiment is provided below in conjunction with the accompanying drawings, technical scheme is made further clear, complete, in detail Explanation.The present embodiment is the most preferred embodiment premised on technical solution of the present invention, but protection scope of the present invention is not limited to down The embodiment stated.
It is as shown in Figure 1 the system principle diagram of the present invention, a kind of control system based on new energy vehicle auxiliary braking, Including main control module 1, digital signal processing module 2, positive-negative power module 3, A/D acquisition modules 4, CAN communication module 5, letter Number drive module 6, drive module 7, Drive Protecting Circuit 8, upper electric pre-charge circuit 9 and fault secure circuit 10, data signal Processing module 2, positive-negative power module 3, A/D acquisition modules 4, CAN communication module 5, signal driver module 6, drive module 7, drive Dynamic protection circuit 8, upper electric pre-charge circuit 9, fault secure circuit 10 are connected with main control module 1 respectively；Modules are mutual Coordinate, each circuit normal work, logic is close, fast response time, control accuracy are high, is not influenceing the premise of former car braking Under, it can effectively make up under specified conditions and brake the shortcomings that insufficient, more automation and intelligent, convenience and high-efficiency；
A/D acquisition modules 4, CAN communication module 5, signal driver module 6, upper electric pre-charge circuit 9, fault secure circuit 10, A/ D Acquisition Circuits 11 are connected with digital signal processing module 2 respectively, digital signal processing module 2 be used for the collection of signal, calculating, Output, communication etc.；Signal driver module 6, fault secure circuit 10 are connected with positive-negative power module 3 respectively, positive-negative power module 3 Light current is provided；Signal driver module 6 is connected with fault secure circuit 10, and fault secure circuit 10 includes：Set on major loop：It is molten Disconnected device and D.C. contactor, contactor band auxiliary contact, and switching signal is input to main control module 1, failure by circuit Protection circuit 10 is used for daily monitoring and maintenance, and when system breaks down, mould is driven to positive-negative power module 3, signal Block 6 is protected, and Real time Efficiency is high；
Drive module 7 is connected by signal driver module 6 with digital signal processing module 2, drive module 7 and Drive Protecting Circuit 8 is in parallel, and load resistance R and A/D Acquisition Circuit 11, A/D Acquisition Circuits are set between drive module 7 and upper electric pre-charge circuit 9 11st, upper electric pre-charge circuit 9 is connected with A/D acquisition modules 4 respectively, and in the control system, modules cooperate, Ge Ge electricity Road normal work, logic is close, fast response time, control accuracy are high, on the premise of former car braking is not influenceed, can effectively make up Braked the shortcomings that insufficient under specified conditions, more automation and intelligent, convenience and high-efficiency.
Further, A/D acquisition modules 4 include braking signal collection unit 401, load parameter collecting unit 402 and temperature Collecting unit 403 is spent, A/D acquisition channels, braking signal collection are set between A/D acquisition modules 4 and digital signal processing module 2 Unit 401 is used for detection and collection vehicle brake pedal status, tramples depth value, and load parameter collecting unit 402 is used to adopt Collect DC bus-bar voltage, load current, temperature collecting cell 403 is used to gather the internal temperature of signal driver module 6, load Resistance R air outlet temperatures and system radiating device temperature, each collecting unit division of labor coordinates, logic is close, convenience and high-efficiency.
Further, drive module 7 is IGBT drive module, and operating efficiency is high, stable, reliable.
Further, signal driver module 6 is IGBT special driving chips, the process auxiliary drive module 7 of signal driver module 6, So that circuit system efficient operation.
Further, Drive Protecting Circuit 8 is RCD protection circuits, and Drive Protecting Circuit 8 is in parallel with drive module 7, driving Protection circuit 8 carries out parameter matching and protection using RCD.
Further, upper electric pre-charge circuit 9 includes major loop and branch road, is provided with current-limiting resistance on branch road, works as collection To busbar voltage reach disconnected branches after preset value, connect major loop.
Further, digital signal processing module 2 is comprising the intelligent chip such as lower interface：CAN communication, A/D collection, PWM outputs, I/O modules etc., typical case are DSP data processors, are responsible for the work(such as the collection of signal, calculating, output, communication Energy.
Further, load resistance R should possess that temperature-coefficient of electrical resistance in certain temperature range is small, characteristic of stable performance.
Further, CAN communication module 5 is connected to the CAN interface and vehicle CAN network of digital signal processing module 2, with Vehicle enters row data communication and exchange.
A kind of control method of control system based on new energy vehicle auxiliary braking of the present invention, comprises the following steps：
Step 1：By system electrification and initialized；
Step 2：Setup parameter：Busbar voltage preset value is set as V0, maximum working voltage Ve, initial load electric current be I0、 Load current is I, Realtime Alerts electric current is Ie, allow number of stoppages preset value be N0, load temperature preset value be T0, load temperature Degree alarming value is T1, load temperature superheat value be T2, T0<T1<T2；
Step 3：Delay carries out A/D collections and conversion, the signal that A/D Acquisition Circuits 11 will collect after waiting until voltage stabilization It is transferred to digital signal processing module 2, A/D acquisition modules 4 respectively, the temperature collecting cell 403 in A/D acquisition modules 4 detects It is T to the internal temperature of signal driver module 6a, load resistance R air outlet temperatures be Tb, system radiating device temperature be Tc；
Step 4：A/D collections finish, and connect and are electrified pre-charge circuit 9, A/D acquisition modules 4 continue state-detection, if A/D Acquisition module 4 detects that busbar voltage V reaches preset value V0, then above electric pre-charge circuit 9 disconnects the control of main control module 1, so After connect major loop；
Step 5：Load parameter collecting unit 402 in A/D acquisition modules 4 detects DC bus-bar voltage V, initial load electric current I0If V=V0、I0=0, then fault-free, into normal mode of operation, and according to normal mode of operation, export theoretical control signal, Control accuracy is adjusted, data is sent, preserves OBD codes；Otherwise, into troubleshooting pattern.
Further, troubleshooting pattern includes level fault diagnosis and temperature fault diagnosis, and the level fault diagnoses, Comprise the following steps：
A1：The main control module 1 controls the A/D acquisition modules to carry out cycle detection to busbar voltage V and load current I, If V>VeOr I>Ie, then main control module 1 disconnects major loop, transmission OBD failure codes, and records number of stoppages N, is transferred to simultaneously Step A2；Otherwise, judge whether the function of drive module 7 is normal, if the function of drive module 7 is normal, is transferred to step A3, is otherwise transferred to Step A4；
A2：If number of stoppages N>N0, then main control module 1 thoroughly disconnect major loop, send OBD failure codes, otherwise, return to step Rapid A1, and carry out electricity precharge；
A3：If the function of drive module 7 is normal, diagnosed into temperature fault, otherwise, main control module 1 disconnects major loop, sends OBD failure codes；
A4：If detecting the dysfunction of drive module 7, the control of main control module 1 disconnects major loop, and sends OBD failure generations Code；
The temperature fault diagnosis, comprises the following steps：
S1：Main control module 1 controls A/D acquisition modules 4 to load temperature TbCycle detection is carried out, if Tb≥T0, then master control molding Block 1 sends instruction：Acousto-optic warning is only sent, while sends OBD failure codes, is then transferred to step S2；Otherwise, into standby mould Formula；
S2：Judge TbWhether T is metb≥T1If Tb≥T1, then main control module 1 send instruction：Acousto-optic warning is sent, reduces work( Rate exports, while sends OBD failure codes, is then transferred to step S3, otherwise, keeps former output state；
S3：Judge TbWhether T is metb≥T2If Tb≥T2, then main control module 1 send instruction：Acousto-optic warning is sent, closes control System loads output, and vehicle braking all transfers to battery charging absorption and vehicle primary brake system to absorb, while sends, stores OBD Failure code.
Further, it is necessary to illustrate, in the present embodiment, troubleshooting pattern includes：Load resistance R high temperature, drive Dynamic model block high temperature, drive module IGBT breakdown, CAN or brake pedal signal interrupt.Drive module high temperature refers to：Deceleration of electrons In, i.e., in the control system of the auxiliary braking, maximum heater element is exactly drive module except load resistance R, and IGBT is in Different dutycycle states, the braking power of output is different, and internal conducting resistance is different, and caloric value is also different.IGBT is as drive Dynamic model block, the switching loss of itself are also main pyrotoxin, the caloric value and switching frequency, driving voltage, size of current, pass Disconnected time relationship is close.Therefore, the three-level alarm set in being diagnosed by temperature fault carries out circuit protection.Drive module IGBT Breakdown refers to：When drive module IGBT D, S pole breakdown occurs, the control system ability out of hand of the auxiliary braking, Load resistance R is in normal open electricity condition, and vehicle drags brake, consumes the energy content of battery, while resistance box temperature rise is very high, influences vehicle peace Entirely.Under this situation, main control module sends CAN failure OBD messages, while the control system of the auxiliary braking is cut off in DSP controls Major loop, vehicle braking transfers to charging electric car absorb and foundation brakes.CAN or brake pedal signal, which interrupt, to be referred to：Work as control When signal interruption or CAN message processed are lost, to ensure the person and vehicle safety, alarm signal can be sent in time, cuts off the auxiliary The control system of braking.Charging electric car absorption and foundation brakes are transferred in vehicle braking pressure.
Further, normal mode of operation is vehicle CAN communication control model or unit operation pattern or combines BMS systems Operational mode.It should be noted that control accuracy can be adjusted well under vehicle CAN communication control model.The present embodiment In, it is battery management system data that entire car controller, which receives BMS, when driver steps on brake pedal, according to speed ratio, full-vehicle control Device judges the charging index 0-100% of BMS system requirements, and the braking power of needs is provided by CAN network.When normally receiving To the braking power of vehicle demand, main control module controls and enters normal mode of operation, calculated by dsp chip, output reason By PWM duty cycle to signal driver module, signal driver module exports theoretical opening angle according to pwm control signal driving IGBT Degree, carry out bearing power adjustment control.Load current and voltage are gathered in real time simultaneously, DSP calculates the control system Actual braking power, compared with the demand power that CAN communication occurs, carried out by actual power load current closed loop adjust Section control, until actual power reach with meet demand precision, and by braking power and the monitoring temperature of each link and work State OBD codes upload to vehicle CAN network；
When receive vehicle demand power be less than setting it is first open power P 0 when, the control system enters stop mode, main control Module closes output, and gives this feedback of status to vehicle CAN network；
After the halt instruction of vehicle is received, the control system enters shutdown mode, main control module control disconnecting consumers electricity Major loop where hindering, this feedback of status is given to vehicle CAN network after DSP detects that contact disconnects really.
We can also use the operational mode with reference to BMS systems in the present embodiment, and the operational mode with reference to BMS systems is It is connected by the control system of auxiliary braking with vehicle CAN network and carries out data acquisition, and is entered by the control system of auxiliary braking Row data analysis and a kind of implementation method of the auxiliary braking calculated, BMS battery management systems are responsible for the dimension of vehicle battery system Shield and data acquisition, and Various types of data is sent to vehicle CAN network.The present invention can carry out directly counting with vehicle BMS systems Connected according to communication, and the information of needs is extracted from BMS communication data frames：Such as battery capacity, cell voltage, charging, discharging electric batteries Coefficient etc., with reference to matching database, the generation of signal is controlled, driving load resistance is run by theoretical demand power, and is tied Actual pedal signal is closed to be modified.Busbar voltage, load current, reality comprising collection in master controller CAN communication data frame The parameters such as border braking power, the monitoring temperature of each link and working condition OBD failure codes.The control system of the auxiliary braking Acousto-optic warning, alarm and action three-level alarm can be realized according to actual working state.
In summary, a kind of control system based on new energy vehicle auxiliary braking of the invention, including main control module 1st, digital signal processing module 2, positive-negative power module 3, A/D acquisition modules 4, CAN communication module 5, signal driver module 6, drive Dynamic model block 7, Drive Protecting Circuit 8, upper electric pre-charge circuit 9 and fault secure circuit 10, modules cooperate, Ge Ge electricity Road normal work, logic is close, fast response time, control accuracy are high, on the premise of former car braking is not influenceed, can effectively make up Braked the shortcomings that insufficient under specified conditions, more automation and intelligent, convenience and high-efficiency；
A kind of control method of control system based on new energy vehicle auxiliary braking of the present invention,
Including master control program and sub- control program, including normal mode of operation and troubleshooting pattern, under troubleshooting pattern Including level fault diagnosis and temperature fault diagnosis, and generally in the state of continuous cycle detection, by accurate, optimization Control program, the division of labor of modules, circuit, unit coordinate, it is ensured that on the premise of not influenceing former car braking, make up specific bar The shortcomings that insufficient is braked under part, it is ensured that each circuit is normal, efficient operation, improves retardation efficiency, widens application conditions, can It is effective to protect battery, extend battery service life, the abrasion of vehicle main brake is reduced, vehicle safety is realized, reliably, quickly makes Dynamic, disclosure is particularly well suited to the realization of plug-in hybrid and pure electric vehicle auxiliary braking, can better meet national phase The requirement that pass standard tests II A types, it is more suitable for promoting on a large scale.
Principal character, general principle and the advantages of the present invention of the present invention has been shown and described above.Industry technology Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the simply explanation described in above-described embodiment and specification is originally The principle of invention, without departing from the spirit and scope of the present invention, the present invention can also have various change according to actual conditions And improvement, these changes and improvements all fall within the protetion scope of the claimed invention.The claimed scope of the invention is by appended Claims and its equivalent thereof.

Claims (9)

  1. A kind of 1. control system based on new energy vehicle auxiliary braking, it is characterised in that：Including main control module（1）, numeral Signal processing module（2）, positive-negative power module（3）, A/D acquisition modules（4）, CAN communication module（5）, signal driver module （6）, drive module（7）, Drive Protecting Circuit（8）, upper electric pre-charge circuit（9）And fault secure circuit（10）, the numeral Signal processing module（2）, positive-negative power module（3）, A/D acquisition modules（4）, CAN communication module（5）, signal driver module （6）, drive module（7）, Drive Protecting Circuit（8）, upper electric pre-charge circuit（9）, fault secure circuit（10）Respectively with it is described Main control module（1）Connection；
    The A/D acquisition modules（4）, CAN communication module（5）, signal driver module（6）, upper electric pre-charge circuit（9）, failure Protection circuit（10）, A/D Acquisition Circuits（11）Respectively with the digital signal processing module（2）Connection, the signal drive mould Block（6）, fault secure circuit（10）Respectively with the positive-negative power module（3）Connection, the signal driver module（6）With it is described Fault secure circuit（10）Connection；
    The drive module（7）Pass through the signal driver module（6）With the digital signal processing module（2）Connection, it is described Drive module（7）With Drive Protecting Circuit（8）Parallel connection, the drive module（7）With the upper electric pre-charge circuit（9）Between set Put load resistance R and A/D Acquisition Circuit（11）, the A/D Acquisition Circuits（11）, upper electric pre-charge circuit（9）Respectively with it is described A/D acquisition modules（4）Connection.
  2. A kind of 2. control system based on new energy vehicle auxiliary braking according to claim 1, it is characterised in that：It is described A/D acquisition modules（4）Including braking signal collection unit（401）, load parameter collecting unit（402）And temperature collecting cell （403）, the A/D acquisition modules（4）With the digital signal processing module（2）Between set A/D acquisition channels, the braking Signal gathering unit（401）For detection and collection vehicle brake pedal status, trample depth value, the load parameter collection Unit（402）For gathering DC bus-bar voltage, load current, the temperature collecting cell（403）For gathering the signal Drive module（6）Internal temperature, load resistance R air outlet temperatures and system radiating device temperature.
  3. A kind of 3. control system based on new energy vehicle auxiliary braking according to claim 1, it is characterised in that：It is described Drive module（7）For IGBT drive module.
  4. A kind of 4. control system based on new energy vehicle auxiliary braking according to claim 1, it is characterised in that：It is described Signal driver module（6）For IGBT special driving chips.
  5. A kind of 5. control system based on new energy vehicle auxiliary braking according to claim 1, it is characterised in that：It is described Drive Protecting Circuit（8）For RCD protection circuits.
  6. A kind of 6. control system based on new energy vehicle auxiliary braking according to claim 1, it is characterised in that：It is described Upper electric pre-charge circuit（9）Including major loop and branch road, current-limiting resistance is provided with the branch road.
  7. A kind of 7. control method of the control system based on new energy vehicle auxiliary braking, it is characterised in that：Comprise the following steps：
    Step 1：By system electrification and initialized；
    Step 2：Setup parameter：Set busbar voltage preset value as V0, maximum working voltage Ve, initial load electric current be I0, Load current is I, Realtime Alerts electric current is Ie, allow number of stoppages preset value to be N0, load temperature preset value is T0, load temperature Degree alarming value is T1, load temperature superheat value is T2, T0<T1<T2；
    Step 3：Delay carries out A/D collections and conversion, the A/D Acquisition Circuits after waiting until voltage stabilization（11）It will collect Signal be transferred to digital signal processing module respectively（2）, A/D acquisition modules（4）, the A/D acquisition modules（4）In temperature Collecting unit（403）Detect the signal driver module（6）Internal temperature is Ta, load resistance R air outlet temperatures are Tb, are System radiator temperature is Tc；
    Step 4：A/D collections finish, and connect the upper electric pre-charge circuit（9）, the A/D acquisition modules（4）Continue shape State detects, if the A/D acquisition modules（4）Detect that busbar voltage V reaches preset value V0, then the main control module（1）Control Electric pre-charge circuit in system（9）Disconnect, then connect major loop；
    Step 5：The A/D acquisition modules（4）In load parameter collecting unit（402）Detect DC bus-bar voltage V, initial Load current I0, if V=V0, I0=0, fault-free, into normal mode of operation, and it is theoretical according to normal mode of operation, output Control signal, adjustment control accuracy, send data, preserve OBD codes；Otherwise, into troubleshooting pattern.
  8. 8. a kind of control method of control system based on new energy vehicle auxiliary braking according to claim 7, it is special Sign is：The troubleshooting pattern includes level fault diagnosis and temperature fault diagnosis, and the level fault diagnoses, including with Lower step：
    A1：The main control module（1）The A/D acquisition modules are controlled to carry out circulation inspection to busbar voltage V and load current I Survey, if V>Ve or I>Ie, then main control module disconnects major loop, transmission OBD failure codes, and records number of stoppages N, turns simultaneously Enter step A2；Otherwise, drive module is judged（7）Whether function is normal, if drive module（7）Function is normal, is transferred to step A3, no Then it is transferred to step A4；
    A2：If number of stoppages N>N0, then main control module thoroughly disconnect major loop, send OBD failure codes, otherwise, return to step Rapid A1, and carry out electricity precharge；
    A3：If the drive module（7）Function is normal, then is diagnosed into temperature fault, otherwise, main control module（1）Disconnect master Loop, send OBD failure codes；
    A4：If detect drive module（7）Dysfunction, then main control module（1）Control disconnects major loop, and sends OBD events Hinder code；
    The temperature fault diagnosis, comprises the following steps：
    S1：The main control module（1）Control the A/D acquisition modules（4）Cycle detection is carried out to load temperature Tb, if Tb >= T0, then main control module（1）Send instruction：Acousto-optic warning is only sent, while sends OBD failure codes, is then transferred to step S2； Otherwise, into standby mode；
    S2：Judge whether Tb meets Tb >=T1, if Tb >=T1, main control module（1）Send instruction：Acousto-optic warning is sent, is dropped Low-power exports, while sends OBD failure codes, is then transferred to step S3, otherwise, keeps former output state；
    S3：Judge whether Tb meets Tb >=T2, if Tb >=T2, main control module（1）Send instruction：Acousto-optic warning is sent, is closed Control load output is closed, while sends, store OBD failure codes.
  9. 9. a kind of control method of control system based on new energy vehicle auxiliary braking according to claim 7, it is special Sign is：The normal mode of operation is vehicle CAN communication control model or unit operation pattern or the operation for combining BMS systems Pattern.
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Cited By (3)

* Cited by examiner, † Cited by third party
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CN110796761A (en) * 2019-11-08 2020-02-14 合肥科尚电子科技有限公司 Data acquisition system for vehicle-mounted equipment based on embedded system
CN110928299A (en) * 2019-11-13 2020-03-27 北京三快在线科技有限公司 Unmanned vehicle control method and unmanned vehicle
CN115366688A (en) * 2022-09-29 2022-11-22 重庆长安新能源汽车科技有限公司 Vehicle brake control method, device, equipment and storage medium

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WO2014057952A1 (en) * 2012-10-09 2014-04-17 株式会社アドヴィックス Vehicle brake device
CN205059307U (en) * 2015-11-03 2016-03-02 成都雅骏新能源汽车科技股份有限公司 Novel vehicle control unit suitable for pure electric vehicles
CN105480098A (en) * 2016-01-19 2016-04-13 重庆邮电大学 Braking energy recovery system for electric vehicle

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014057952A1 (en) * 2012-10-09 2014-04-17 株式会社アドヴィックス Vehicle brake device
CN205059307U (en) * 2015-11-03 2016-03-02 成都雅骏新能源汽车科技股份有限公司 Novel vehicle control unit suitable for pure electric vehicles
CN105480098A (en) * 2016-01-19 2016-04-13 重庆邮电大学 Braking energy recovery system for electric vehicle

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110796761A (en) * 2019-11-08 2020-02-14 合肥科尚电子科技有限公司 Data acquisition system for vehicle-mounted equipment based on embedded system
CN110796761B (en) * 2019-11-08 2021-07-02 合肥科尚电子科技有限公司 Data acquisition system for vehicle-mounted equipment based on embedded system
CN110928299A (en) * 2019-11-13 2020-03-27 北京三快在线科技有限公司 Unmanned vehicle control method and unmanned vehicle
CN115366688A (en) * 2022-09-29 2022-11-22 重庆长安新能源汽车科技有限公司 Vehicle brake control method, device, equipment and storage medium

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