CN106809014A - A kind of electric automobile and its power-supply system - Google Patents
A kind of electric automobile and its power-supply system Download PDFInfo
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- CN106809014A CN106809014A CN201710180732.7A CN201710180732A CN106809014A CN 106809014 A CN106809014 A CN 106809014A CN 201710180732 A CN201710180732 A CN 201710180732A CN 106809014 A CN106809014 A CN 106809014A
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- 238000012544 monitoring process Methods 0.000 claims abstract description 28
- 230000009466 transformation Effects 0.000 claims abstract description 13
- 238000005070 sampling Methods 0.000 claims description 40
- 238000006243 chemical reaction Methods 0.000 claims description 18
- 238000004891 communication Methods 0.000 claims description 11
- 230000002159 abnormal effect Effects 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 6
- 238000000465 moulding Methods 0.000 claims description 2
- 239000002253 acid Substances 0.000 abstract description 14
- 238000012423 maintenance Methods 0.000 abstract description 7
- 238000010586 diagram Methods 0.000 description 7
- 230000005611 electricity Effects 0.000 description 6
- 230000008859 change Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- HEZMWWAKWCSUCB-PHDIDXHHSA-N (3R,4R)-3,4-dihydroxycyclohexa-1,5-diene-1-carboxylic acid Chemical compound O[C@@H]1C=CC(C(O)=O)=C[C@H]1O HEZMWWAKWCSUCB-PHDIDXHHSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
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Classifications
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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
- B60L1/00—Supplying electric power to auxiliary equipment of vehicles
-
- 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
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
- B60L3/0046—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electric energy storage systems, e.g. batteries or capacitors
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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
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/04—Cutting off the power supply under fault conditions
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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
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
-
- 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
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Abstract
The invention discloses a kind of electric automobile and its power-supply system.The power-supply system includes：Battery cell monitoring module, is connected with the vehicle power accumulator of electric automobile, the running parameter for monitoring vehicle power accumulator；Control module, is connected with battery cell monitoring module, for judging whether vehicle power accumulator is working properly according to running parameter, and output control signal；Switch module, is connected with control module, for the control signal on or off exported according to control module；And voltage transformation module, the electric appliance load with switch module and electric automobile is connected, for the cell voltage of vehicle power accumulator to be converted into voltage needed for electric appliance load, electric appliance load powered when switch module is turned on.The power-supply system that the present invention is provided can cancel use of the 12V lead-acid batteries on electric automobile in the prior art, make full use of vehicle power accumulator, reduce battery maintenance cost.
Description
Technical field
The present invention relates to electric vehicle engineering field, more particularly to a kind of electric automobile and its power-supply system.
Background technology
Electric automobile realizes the control of vehicle by control system with Vehicular accumulator cell as power, and car is driven by motor
Wheel traveling, meets the requirements of road traffic, security legislation.Simultaneously as the relatively conventional vapour of electric automobile effect on environment
Car is smaller, and its prospect is had an optimistic view of extensively.
Wherein, the control system of electric automobile is powered using 12V power supplies, thus, in the prior art typically electronic
On automobile in addition to the power accumulator of vehicle is set, 12V lead-acid accumulators are additionally provided with to provide the normal power supplies of 12V,
For example, the Chinese patent of Patent No. CN200910144367.X discloses a kind of 12 V storage battery working system of pure electric vehicle
Technical scheme, in the technical scheme, work system includes the power accumulator of 12V batteries and vehicle.This set side
In terms of formula haves the shortcomings that following four：In a first aspect, during vehicle use, except the power accumulator to vehicle is safeguarded
Outward, also need to safeguard 12V batteries, maintenance cost is big；Second aspect, 12V lead-acid battery self discharges are big, energy density is low and electricity
It is few, easily there is power shortage situation, cause vehicle normally to start；The third aspect, the lead in 12V lead-acid batteries is heavy metal,
Environmental pollution is very big；Fourth aspect, this kind of set-up mode is without preferably utilizing power accumulator so that system without
Ji.
In sum, on above-mentioned technical problem present in prior art, effective solution is not yet proposed at present.
The content of the invention
It is an object of the invention to provide a kind of electric automobile and its power-supply system, to solve to be stored using 12V in the prior art
Battery provides the mode of the normal power supplies of 12V, the skill for causing the work system maintenance cost of electric automobile greatly, easily to break down
Art problem.
To achieve these goals, the invention provides a kind of power-supply system of electric automobile.The power-supply system includes：Electricity
Cell monitoring module, is connected with the vehicle power accumulator of electric automobile, the running parameter for monitoring vehicle power accumulator；
Control module, is connected with battery cell monitoring module, for judging whether vehicle power accumulator is working properly according to running parameter,
The control signal of output control switch module conducting when normal, the control letter that output control switch module disconnects when abnormal
Number；Switch module, is connected with control module, for the control signal on or off exported according to control module；And electricity
Pressure modular converter, the electric appliance load with switch module and electric automobile is connected, for the battery of vehicle power accumulator is electric
Pressure is converted to voltage needed for electric appliance load, and electric appliance load is powered when switch module is turned on.
Further, the power-supply system also includes：Transport module, is connected with control module, for running parameter to be passed
Transport to the BMS main controllers of electric automobile.
Further, battery cell monitoring module includes that collector and voltage sampling circuit, temperature sampling circuit and electric current are adopted
It is any one or more in three sample circuits of sample circuit, wherein：Voltage sampling circuit is more for vehicle power accumulator of sampling
The voltage signal of individual sampled point, transmits to collector；Temperature signal of the temperature sampling circuit for vehicle power accumulator of sampling
And voltage signal is converted to, transmit to collector；Collector and voltage sampling circuit, temperature sampling circuit and control module difference
It is connected, transmits to control module sampled result for the form by serial communication；Current sampling circuit and control module
It is connected, is input into control module for the current signal of vehicle power accumulator to be converted into voltage signal.
Further, voltage sampling circuit includes：Multiple voltage sample branch roads, each voltage sample branch road is whole for sampling
One voltage signal of sampled point of car power accumulator, wherein, m-th voltage sample branch road includes M resistance and M electric capacity,
The first end connection sampled point of M resistance, the second end connection multiplexer of M resistance, first end and the M of M electric capacity
Second end of resistance is connected, and the second end of M electric capacity connects the negative wire of power-supply system, and m-th voltage sample branch road is multiple
Any one in voltage sample branch road；Multiplexer, the input of multiplexer connects each voltage sampling circuit, many
The output end connection collector of path multiplexer.
Further, current sampling circuit includes current divider, and current divider is series in the negative wire of vehicle power accumulator, point
The secondary voltage for flowing device is connected with control module.
Further, temperature sampling circuit includes thermistor, and thermistor is connected with collector.
Further, collector includes：Signal processing circuit, is connected with thermistor；Analog to digital conversion circuit, with signal
Process circuit and multiplexer are respectively connected with；Communication serial ports, is connected with analog to digital conversion circuit.
Further, power-supply system also include power supply module, power supply module include Boost DC converter ic and
Step-down type dc converter ic, the output end of Boost DC converter ic is connected with collector, and booster type is straight
The input for flowing converter ic is connected with the output end of step-down type dc converter ic, step-down type dc Transform Sets
Input into circuit is connected with vehicle power accumulator, the output end and control module of step-down type dc converter ic
It is connected.
Further, switch module includes drive module and switching tube, and the input of drive module is connected with control module
Connect, the output end of drive module is connected with the first end of switching tube, the second end connection vehicle power accumulator of switching tube is opened
Close the three-terminal link voltage transformation module of pipe.
To achieve these goals, the invention provides a kind of electric automobile.The electric automobile includes：Vehicle power electric power storage
Pond；The power-supply system of any one electric automobile that the present invention is provided, power-supply system is connected with vehicle power accumulator；And
Electric appliance load, is connected with power-supply system.
The present invention proposes a kind of power-supply system of electric automobile, and the power-supply system includes the work to vehicle power accumulator
Battery cell monitoring module that state is monitored, turned on and shut-off according to the monitored results controlling switch module of battery cell monitoring module
Control module, switch module and voltage transformation module, when the work of vehicle power accumulator is abnormal, switch module shut-off,
Now circuit disconnects, and voltage transformation module stops voltage conversion, so that power-supply system stops being powered to electric appliance load；It is dynamic in vehicle
When power battery-operated is normal, switch module is turned on, now connection, and voltage transformation module carries out voltage conversion, so that electric
Origin system is normally powered to electric appliance load, on the one hand, can be supplied to electric appliance load by changing the voltage of vehicle power accumulator
Electricity, so that cancel use of the 12V lead-acid batteries on electric automobile in the prior art, so as to when the later stage, vehicle was used, only need
Electrokinetic cell is safeguarded, maintenance cost is small, and avoid some failures that 12V lead-acid batteries are easily produced；The opposing party
Face, when vehicle power accumulator is normal, carries out above-mentioned voltage conversion, when vehicle power accumulator is abnormal, stops voltage and turns
Change, although vehicle power accumulator is make use of during being powered to electric appliance load, but effectively to vehicle power electric power storage
Protected in pond, it is to avoid because above-mentioned voltage conversion damages vehicle power accumulator.
Brief description of the drawings
The theory diagram of the power-supply system of the electric automobile that Fig. 1 is provided for the application first embodiment；
The theory diagram of the power-supply system of the electric automobile that Fig. 2 is provided for the application second embodiment；
The theory diagram of the power-supply system of the electric automobile that Fig. 3 to Fig. 5 is provided for the application 3rd embodiment.
Specific embodiment
To enable the above objects, features and advantages of the present invention more obvious understandable, in following specific embodiment
In, the present invention is further detailed explanation.
In each embodiment of the invention, vehicle power accumulator is changed by power-supply system and provides 12V to electric automobile
Normal power supply, so as to during the use of vehicle, need to only be safeguarded to vehicle electrokinetic cell, compared with prior art,
Maintenance free 12V lead-acid batteries, save maintenance cost；Avoid the easy failure brought using 12V lead-acid batteries, environment is produced
The problems such as raw pollution；Vehicle power accumulator except to vehicle traveling provide power in addition to, also to the control system of electric automobile
System power supply, preferably make use of vehicle power accumulator so that electric automobile is more economical.
Specifically, the working condition of vehicle power accumulator is monitored by setting battery cell monitoring module, and will
Monitored results are transmitted to control module, by conducting and the shut-off of control module controlling switch module, in vehicle power accumulator work
When making abnormal, switch module shut-off, now circuit disconnection, voltage transformation module stops voltage conversion, so that power-supply system is stopped
Only powered to electric appliance load；When vehicle power accumulator is working properly, switch module is turned on, now connection, and voltage turns
Mold changing block carries out voltage conversion, so that power-supply system is normally powered to electric appliance load.
In sum, the electric automobile and its power-supply system that each embodiment of the invention is provided can be cancelled in the prior art
Use of the 12V lead-acid batteries on electric automobile, the normal power supplies of 12V are turned by vehicle power accumulator by voltage transformation module
There is provided after changing, when later stage vehicle is used, electrokinetic cell need to only be safeguarded.
Main thought with the above as present inventive concept, each embodiment for describing present invention offer in detail is as follows.
First embodiment
The theory diagram of the power-supply system of the electric automobile that Fig. 1 is provided for the application first embodiment, the embodiment is provided
Power-supply system be applied in electric automobile, by the photovoltaic conversion to vehicle power accumulator, powered to vehicle low-pressure system.
Specifically, as shown in figure 1, the power-supply system of the electric automobile includes battery cell monitoring module 11, control module 12, switch module 13
With voltage transformation module 14.
Battery cell monitoring module 11 is connected with the vehicle power accumulator of electric automobile, for monitoring vehicle power accumulator
Running parameter, including but not limited to one or more in the parameter such as operating current, voltage, electricity and temperature, for by
The vehicle power accumulator that multiple battery bags are formed in parallel or series, the running parameter of preferred pair each battery bag is monitored.
After the running parameter that monitoring obtains vehicle power accumulator, monitored results are sent to control module 12, so that control module
12 send control signal according to monitored results.
Control module 12 is connected with battery cell monitoring module 11, for the work ginseng monitored according to battery cell monitoring module 11
Number judges whether vehicle power accumulator is working properly, for example, preset vehicle power accumulator is being just in battery cell monitoring module 11
The parameter area for often working, the running parameter that battery cell monitoring module 11 is monitored is compared with preset parameter area,
When vehicle power accumulator is normal, 12 output control switch module of control module 13 conducting control signal to switch module 13,
When vehicle power accumulator is abnormal, the control signal that 12 output control switch module of control module 13 disconnects to switch module
13。
Switch module 13 is connected with control module 12, for the control signal conducting exported according to control module or pass
It is disconnected, when switch module 13 is turned on, the state that whole power-supply system circuit is on, when switch module 13 is turned off, entirely
Power-supply system circuit is in the state for disconnecting.
Voltage transformation module 14 is connected with the electric appliance load of switch module 13 and electric automobile, for vehicle power to be stored
The cell voltage of battery is converted to voltage needed for electric appliance load, and electric appliance load is powered when switch module 13 is turned on.
The power-supply system of the electric automobile provided using the embodiment, improves the utilization to vehicle power accumulator, fills
Distribution waved the advantage of vehicle power accumulator, it is to avoid the inferior position of lead-acid battery, eliminates 12V lead-acid batteries in the prior art
Use on electric automobile, reduces the later maintenance link to 12V lead-acid batteries.
Second embodiment
The theory diagram of the power-supply system of the electric automobile that Fig. 2 is provided for the application second embodiment, the embodiment be
A kind of preferred embodiment on the basis of above-mentioned first embodiment.As shown in Fig. 2 the power supply of the electric automobile that the embodiment is provided
System includes battery cell monitoring module 11, control module 12, switch module 13, voltage transformation module 14, transport module 15 and power supply
Module 16.
Wherein, battery cell monitoring module 11 includes voltage sampling circuit 111, temperature sampling circuit 112, current sampling circuit
113 and collector 114.
According to the composition of vehicle power accumulator, multiple voltage sample points are set, are sampled by voltage sampling circuit 111 whole
The voltage signal of car power accumulator multiple sampled points, and the voltage signal that will be collected transmitted to collector 114.Specifically,
Voltage sampling circuit 111 includes multiple voltage sample branch roads and multiplexer, each voltage sample branch road sampling vehicle power
One voltage signal of sampled point of battery, the voltage signal that then will be sampled is input into the input of multiplexer, many
The output end connection collector 114 of path multiplexer, the voltage signal that collector 114 exports multiplexer passes through serial communication
Form transmit to control module 12.
Temperature sampling circuit 112 is used for the sample temperature signal of vehicle power accumulator, and the temperature signal that will be collected
Be converted to voltage signal to transmit to collector 114, the voltage signal that collector 114 will be changed by temperature signal passes through serial communication
Form transmit to control module 12.Preferably, using thermistor sampling vehicle power accumulator in temperature sampling circuit 112
Temperature signal, thermistor is connected with collector 114, when the temperature of vehicle power accumulator is different, thermistor
Resistance changes, and the voltage at thermistor two ends changes, so that the voltage change at thermistor two ends is achievable whole
The monitoring of car power accumulator temperature.
Current sampling circuit 113 is directly connected with control module 12, the electric current of real-time detection vehicle power accumulator, and
The current signal that will be detected is converted to voltage signal and is input into control module 12.Preferably, used in current sampling circuit 113
Current divider realizes the current detecting of vehicle power accumulator, and current divider is series in the negative wire of vehicle power accumulator, shunting
The secondary voltage of device is connected with control module 12, when the electric current of vehicle power accumulator changes, current divider it is secondary
Voltage changes, so as to realize the monitoring of vehicle power accumulator electric current.
Collector 114 includes signal processing circuit, analog to digital conversion circuit and communication serial ports, thermistor and signal transacting
Circuit is connected, and thermistor is input into signal processing circuit, signal processing circuit after temperature signal is converted to voltage signal
After the signal transacting step such as being filtered, amplifying, data signal is converted to through analog to digital conversion circuit, it is finally defeated via communication serial ports
Go out to control module；The voltage that each voltage sample branch road is collected by after multiplexer, inputing to analog to digital conversion circuit,
Data signal is converted to through analog to digital conversion circuit, is finally exported to control module via communication serial ports.
Switch module 13 includes drive module 131 and switching tube 132, input and the control module 12 of drive module 131
It is connected, drive module 131 is used for the control signal according to the generation of control module 12 come the on off state of driving switch pipe 132,
When switching tube 132 is turned on, the state that whole power-supply system circuit is on, when switching tube 132 ends, whole power supply system
System circuit is in the state for disconnecting.
Transport module 15 is connected with control module 12, for the voltage signal, the electric current letter that are collected into control module 12
Number and temperature signal the BMS (Battery Management System) of electric automobile is sent to by CAN message form
Main controller, to facilitate BMS main controllers to carry out battery SOC calculating etc..
Power supply module 16 includes Boost DC converter ic 161 and step-down type dc converter ic 162, rises
The output end of die mould direct current converter ic 161 is connected with collector 114, Boost DC converter ic 161
Input is connected with the output end of step-down type dc converter ic, the input of step-down type dc converter ic 162
End is connected with vehicle power accumulator, and the output end of step-down type dc converter ic 162 is connected with control module 12.
3rd embodiment
The theory diagram of the power-supply system of the electric automobile that Fig. 3 to Fig. 5 is provided for the application 3rd embodiment, based on length
Limitation, is interconnected relationship between each figure, wherein, the circuit of the correspondence position of Fig. 3 and Fig. 4 is connected with each other, Fig. 4 and Fig. 5
Correspondence position circuit be connected with each other, collectively constitute the theory diagram of power-supply system.
Specifically, electric automobile in the market, the normal power supplies of 12V are only provided by 12V lead-acid batteries, without utilization
The electrokinetic cell (namely vehicle power accumulator) of electric automobile, the embodiment eliminates 12V lead-acid batteries on electric automobile
Use, the normal power supplies of 12V by electric automobile power battery by DC voltage converter change after provide.Later stage vehicle makes
Used time, electrokinetic cell need to only be safeguarded.
As shown in Figures 3 to 5, power-supply system includes M voltage sample branch road, multiplexer (not shown), heat
Quick resistance M, current divider FL1, voltage-dropping type DCDC integrated circuits U1, Micro-processor MCV (namely control module) U2, MOSFET drive
Device integrated circuit (namely drive module) U3, high pressure turn 12DCDC (namely voltage transformation module) U4, CAN transceiver integrated circuit
(namely transport module) U6, step-up DC/DC integrated circuit U8, battery pack monitor integrated circuit (namely collector) U9, the tenth
One electric capacity C11, the 12nd electric capacity C12, the first inductance L1, zero resistance R0 and switching tube Q1.
Wherein, battery pack sets M voltage sample point, and M voltage sample branch road is carried out to the voltage of M voltage sample point
Sampling, wherein, the 1st voltage sample branch road includes the first end connection of first resistor R1 and the first electric capacity C1, first resistor R1
Sampled point 1, the second end connection multiplexer of first resistor R1, the first end of the first electric capacity C1 and the second of first resistor R1
End is connected, and second end of the first electric capacity C1 connects the negative wire of power-supply system；2nd voltage sample branch road includes second resistance R2
With the second electric capacity C2, second resistance R2 the second end connection sampled point 2, second resistance R2 the second end connection multiplexer,
Second end of the second electric capacity C2 is connected with second end of second resistance R2, the second end connection power-supply system of the second electric capacity C2
Negative wire；By that analogy, m-th voltage sample branch road includes that the M ends of M resistance RM and M electric capacity CM, M resistance RM connect
The M ends connection multiplexer of sampled point M, M resistance RM, the M ends of M electric capacity CM are connected with the M ends of M resistance RM
Connect, the M ends of M electric capacity CM connect the negative wire of power-supply system.
Each collection point voltage is by after multiplexer, inputing to battery pack monitor integrated circuit (namely collector)
The analog to digital conversion circuit of U9, is converted into data signal, and the voltage signal for collecting is transferred to by serial communication form then
The input port INPUT of Micro-processor MCV (namely control module) U2.
Then temperature transition into voltage signal is inputed to the letter of battery pack monitor IC interior by thermistor M
Number process circuit and analog to digital conversion circuit, are converted into data signal, then by serial communication form the temperature for collecting
Input port INPUT of the signal transmission to Micro-processor MCV (namely control module) U2.
Electric current is converted into voltage signal by current divider FL1, is directly transferred to Micro-processor MCV (namely control module) U2's
Current sample port.
Micro-processor MCV (namely control module) U2 passes through the voltage signal, current signal and temperature signal that are collected into
TX ports and RX ports, CAN transceiver integrated circuit U6 is sent in CAN message form, then by the integrated electricity of CAN transceiver
Road U6 is transmitted to BMS main controller U7, and battery SOC calculating etc. is carried out by BMS main controllers U7.
Meanwhile, the output port of Micro-processor MCV (namely control module) U2 is with mosfet driver integrated circuit U3's
Input port is connected, and the first end of zero resistance R0 is connected to the output end of Micro-processor MCV (namely control module) U2
In both gut-nodes between mouth and the input port of mosfet driver integrated circuit U3, the second end ground connection of zero resistance R0.
When voltage signal is less than protection temperature less than protection voltage, current signal less than protective current and/or temperature signal, microprocessor
Device MCU (namely control module) U2 outputs signal to mosfet driver integrated circuit U3, mosfet driver integrated circuit U3
Output end be connected with the control end of switching tube Q1, controlling switch pipe Q1 disconnect or turn on, it is to avoid battery is crossed and put.While micro- place
Reason device MCU (namely control module) U2, battery pack monitor integrated circuit (namely collector) U9 enter standby mode, reduce quiet
State power consumption.
Voltage-dropping type DCDC integrated circuits U1 output voltage, as reference power supply to Micro-processor MCV (namely control mould
Block) U2, mosfet driver integrated circuit (namely drive module) U3, CAN transceiver integrated circuit (namely transport module)
U6, step-up DC/DC integrated circuit U8 are powered.
The power-supply system provided using the embodiment, the voltage of cell voltage monitoring module monitoring vehicle power accumulator,
Electric current and temperature, when there is string node cell voltage to drop to protection voltage, and/or battery current drops to protective current, and/or
When battery temperature is higher than protection temperature, by exporting the change of rigid line low and high level state, Micro-processor MCV (namely control is notified
Molding block) U2 disconnection discharge switches.
When Micro-processor MCV (namely control module) U2 does not receive battery anomaly parameter, by changing for rigid line state
Become and notify MOSFET drive modules, close discharge switch, when MOSFET drive modules receive closure discharge switch to be instructed, drive
Dynamic switching tube Q1 closures, current direction show color dotted line:Electric current turns 12V DCDC U4 and flows out through switching tube Q1 flow directions from high pressure
C points, continue towards D points, finally flow back to vehicle power accumulator.
Fourth embodiment
This embodiment offers a kind of electric automobile, the electric automobile includes that vehicle power accumulator, the present invention are provided
The power-supply system of any one electric automobile, and electric appliance load, wherein, power-supply system is connected with vehicle power accumulator,
It is electric appliance load voltage by vehicle power accumulator voltage conversion, to electric appliance load in vehicle power accumulator normal work
Power supply, the battery powered for electric appliance load is increased without extra.
Each embodiment in this specification is described by the way of progressive, what each embodiment was stressed be with
The difference of other embodiment, between each embodiment identical similar part mutually referring to.
A kind of electric automobile provided by the present invention and its power-supply system are described in detail above, it is used herein
Specific case is set forth to principle of the invention and implementation method, and the explanation of above example is only intended to help and understands
The method of the present invention and its core concept；Simultaneously for those of ordinary skill in the art, according to thought of the invention, in tool
Be will change in body implementation method and range of application, in sum, this specification content should not be construed as to the present invention
Limitation.
Claims (10)
1. a kind of power-supply system of electric automobile, it is characterised in that including：
Battery cell monitoring module, is connected with the vehicle power accumulator of electric automobile, for monitoring the vehicle power accumulator
Running parameter；
Control module, is connected with the battery cell monitoring module, for judging that the vehicle power stores according to the running parameter
Whether battery is working properly, the control signal of output control switch module conducting, output control institute when abnormal when normal
State the control signal of switch module disconnection；
The switch module, is connected with the control module, for the control signal conducting exported according to the control module
Or shut-off；And
Voltage transformation module, the electric appliance load with the switch module and the electric automobile is connected, for by the vehicle
The cell voltage of power accumulator is converted to voltage needed for the electric appliance load, when the switch module is turned on to the electrical equipment
Load supplying.
2. the power-supply system of electric automobile according to claim 1, it is characterised in that also include：
Transport module, is connected with the control module, for transmitting the running parameter to the BMS master controls of electric automobile
Device.
3. the power-supply system of electric automobile according to claim 2, it is characterised in that the battery cell monitoring module includes adopting
It is any one or more in storage and voltage sampling circuit, three sample circuits of temperature sampling circuit and current sampling circuit,
Wherein：
The voltage sampling circuit is used to sampling the voltage signal of vehicle power accumulator multiple sampled points, transmits to described
Collector；
The temperature sampling circuit be used for sample the vehicle power accumulator temperature signal and be converted to voltage signal, transmit
To the collector；
The collector is respectively connected with the voltage sampling circuit, the temperature sampling circuit and the control module, uses
Sampled result is transmitted to the control module in the form by serial communication；
The current sampling circuit is connected with the control module, for the current signal of the vehicle power accumulator to be turned
Voltage signal is changed to be input into the control module.
4. the power-supply system of electric automobile according to claim 3, it is characterised in that the voltage sampling circuit includes：
Multiple voltage sample branch roads, each described voltage sample branch road is used for one sampled point of the vehicle power accumulator of sampling
Voltage signal, wherein, m-th voltage sample branch road includes M resistance and M electric capacity, and the first end of the M resistance is connected
The sampled point, the second end connection multiplexer of the M resistance, first end and the M resistance of the M electric capacity
The second end be connected, the second end of the M electric capacity connects the negative wire of power-supply system, and the m-th voltage sample branch road is
Any one in multiple voltage sample branch roads；
The multiplexer, the input of the multiplexer connects each voltage sampling circuit, the multiplexer
Output end connect the collector.
5. the power-supply system of electric automobile according to claim 4, it is characterised in that the current sampling circuit includes point
Stream device, the current divider is series in the negative wire of the vehicle power accumulator, the secondary voltage of the current divider and the control
Molding block is connected.
6. the power-supply system of electric automobile according to claim 5, it is characterised in that the temperature sampling circuit includes heat
Quick resistance, the thermistor is connected with the collector.
7. the power-supply system of electric automobile according to claim 6, it is characterised in that the collector includes：
Signal processing circuit, is connected with the thermistor；
Analog to digital conversion circuit, is respectively connected with the signal processing circuit and the multiplexer；
Communication serial ports, is connected with analog-digital conversion circuit as described.
8. the power-supply system of electric automobile according to claim 3, it is characterised in that the power-supply system also includes power supply
Module, the power supply module includes Boost DC converter ic and step-down type dc converter ic, the boosting
The output end of type direct current converter ic is connected with the collector, the input of the Boost DC converter ic
End is connected with the output end of the step-down type dc converter ic, the input of the step-down type dc converter ic
End is connected with the vehicle power accumulator, output end and the control module of the step-down type dc converter ic
It is connected.
9. the power-supply system of electric automobile according to claim 1, it is characterised in that the switch module includes driving mould
Block and switching tube, the input of the drive module are connected with the control module, the output end of the drive module and institute
The first end for stating switching tube is connected, and the second end of the switching tube connects the vehicle power accumulator, the switching tube
Voltage transformation module described in three-terminal link.
10. a kind of electric automobile, it is characterised in that including：
Vehicle power accumulator；
The power-supply system of the electric automobile any one of claim 1 to 9, the power-supply system stores with the vehicle power
Battery is connected；And
Electric appliance load, is connected with the power-supply system.
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| CN201710180732.7A CN106809014A (en) | 2017-03-23 | 2017-03-23 | A kind of electric automobile and its power-supply system |
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| CN201710180732.7A CN106809014A (en) | 2017-03-23 | 2017-03-23 | A kind of electric automobile and its power-supply system |
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| CN108340856A (en) * | 2018-02-09 | 2018-07-31 | 合肥巨动力系统有限公司 | A kind of new-energy automobile power supply system for cancelling A-battery |
| CN109624714A (en) * | 2018-12-29 | 2019-04-16 | 银隆新能源股份有限公司 | A kind of electric car power supply system |
| CN110126755A (en) * | 2019-05-13 | 2019-08-16 | 深圳市锐明技术股份有限公司 | A kind of vehicle power supply monitoring device |
| CN110254374A (en) * | 2019-07-19 | 2019-09-20 | 上海法雷奥汽车电器系统有限公司 | A kind of automotive control circuit and its control method |
| CN110356234A (en) * | 2018-03-26 | 2019-10-22 | 沃尔沃汽车公司 | Vehicle powering system with redundancy and the method for controlling power supply system |
| CN110492736A (en) * | 2018-05-15 | 2019-11-22 | 银隆新能源股份有限公司 | Power supply on vehicle and power supply on vehicle circuit |
| CN110920392A (en) * | 2019-11-19 | 2020-03-27 | 珠海格力电器股份有限公司 | Power supply control circuit, power supply control method and new energy automobile |
| CN111169289A (en) * | 2020-01-06 | 2020-05-19 | 深圳天邦达新能源技术有限公司 | New energy automobile battery protection device and method |
| CN112751378A (en) * | 2019-10-29 | 2021-05-04 | 大众汽车股份公司 | Control device for a high-voltage battery and method for operating a control device |
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| CN112824127A (en) * | 2019-11-15 | 2021-05-21 | 株洲中车时代电气股份有限公司 | Multi-path acquisition temperature limit protection device and method for train storage battery box |
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Application publication date: 20170609 |