CN206171232U - Electric automobile energy management device - Google Patents

Electric automobile energy management device Download PDF

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Publication number
CN206171232U
CN206171232U CN201621260870.3U CN201621260870U CN206171232U CN 206171232 U CN206171232 U CN 206171232U CN 201621260870 U CN201621260870 U CN 201621260870U CN 206171232 U CN206171232 U CN 206171232U
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module
battery
resistance
single channel
relay
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杨鹏
张冬颖
刘金枝
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Hebei University of Technology
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Hebei University of Technology
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/70Energy storage systems for electromobility, e.g. batteries

Abstract

The utility model relates to an electric automobile energy management system. This system composition including accuse master controller module, a relay unit, the 2nd relay unit, the 3rd relay unit, too can battery pack module, super capacitor module and battery pack module, wherein master controller module is connected with a relay unit, the 2nd relay unit, the 3rd relay unit respectively, a relay unit, solar array module, the 2nd relay unit, super capacitor module, the 3rd relay unit and battery pack module are consecutive, master controller module still links to each other with battery pack module. The utility model discloses management electric automobile energy system that can be better has improved the availability factor of battery, has increased lithium ion battery's life.

Description

Electric automobile energy managing device
Technical field:
This utility model is related to electric automobile energy management system field, in particular for electric automobile power battery charge and discharge Electric control strategy and stack battery (generally two to three Battery packs) switch the research of using method.
Background technology:
Electric automobile as a kind of new forms of energy vehicles, with noise it is low, efficiency of energy utilization is high, without mobile waste gas row The features such as putting, it has also become one of emerging strategic industries that China's emphasis is supported.Energy resource supply is in ev industry chain Important step, energy resource supply pattern is closely related with the development of electric automobile.The energy supply of current electric automobile is mostly single Li-ion batteries piles are provided, and its managing device is only limitted to the detection of relatively simple voltage x current and to battery dump energy Estimation.This device can not be to battery using the relatively reasonable scope of application is proposed, simultaneously because technique in cell fabrication processes Difference, once occurring damaging monoblock battery and cannot use, and cell damage replacement cost can be significantly for its internal cell Increase.Substantial amounts of heat can be produced during during single set of cells use simultaneously, it is very unfavorable to be used for.
Utility model content:
This utility model technical issues that need to address are electric automobile energy management systems, it is proposed that solaode, Quick charge between super capacitor and lithium ion battery.And two groups of lithium ion batteries quick charge and charge and discharges in groups under civil power The control strategy of electricity, that is, provide a kind of control system based on PIC single chip microcomputer, can detect vehicle-mounted lithium ion battery voltage, Realize more accurately calculating on-vehicle battery capacity on the basis of electric current accurate measurement, and proposed according to result of calculation scientific and reasonable The switching of two Battery packs and occupation mode, so as to realize the control to electric automobile whole energy resource system and rational set of cells Switching use control strategy.
The technical scheme that this utility model is adopted for:
A kind of electric automobile energy management system;System composition include control main controller module, the first relay unit, Second relay unit, the 3rd relay unit, solar battery group module, super-capacitor module and battery module;Wherein Main controller module is connected respectively with the first relay unit, the second relay unit, the 3rd relay unit;First relay Device unit, solar battery group module, the second relay unit, super-capacitor module, the 3rd relay unit and set of cells mould Block is sequentially connected;Main controller module is also connected with battery module;
First relay unit, the second relay unit, the 3rd relay unit include SRS4100 relays;
It is described too can battery module include solar panel;
Super-capacitor module is super capacitor;
Described battery module is two groups of separate master battery packs and battery backup;
The composition of described main controller module includes single-chip microcomputer.
Described main controller module consists of single-chip microcomputer, 2 Battery pack switch controllers, data-storing module, temperature control Module, display module, alarm module;Composition per Battery pack switch controller includes 1 battery voltage sensing module, 1 electricity Pond group handover module and 1 current detection module;Battery voltage sensing module, set of cells handover module, battery current detection mould Block, data-storing module, temperature control module, display module, alarm module are connected with the corresponding pin of single-chip microcomputer;Cut per Battery pack In changer controller, current detection module is connected respectively with set of cells handover module and voltage detection module, voltage detection module, electricity Pond group handover module is connected respectively with master battery pack, battery backup;Wherein, as the composition of charging end, Battery pack switching In controller, battery voltage sensing module, battery current detection module are connected respectively with charge controller module, charge controller Module is also connected with master battery pack, battery backup respectively;And as the composition of equipment end, another Battery pack switch controller In, battery voltage sensing module, battery current detection module are connected respectively with electrical equipment, electrical equipment also respectively with main battery Group, battery backup are connected.
Described current detection module consists of the first chip, resistance R7, resistance R9, the first sampling resistor * 3;First core The RG1 pins of piece are connected with one end of resistance R7, and the other end of resistance R7 is connected with the first sampling resistor, the RG2 of the first chip Pin is connected with resistance R9, and the other end of resistance R9 is connected with the other ends of the first sampling resistor * 3, the first sampling resistor it is another End also be connected with 1 end of the first single channel relay of set of cells handover module respectively, 1 end of the 4th single channel relay, voltage are examined The resistance R1 for surveying module is connected, and the GND pin of the first chip is connected ground connection with SHDN pins;The OUT pins of the first chip with The RA2 pins of single-chip microcomputer are connected;
Described voltage detection module consists of divider resistance R1, R2, concrete connected mode be resistance R1 respectively with battery Group handover module the first single channel relay 1 end connection, the 3rd single channel relay 1 end be connected, resistance R1 also respectively with electricity Stream the first sampling resistor resistance of detection module, resistance R9 are connected, the R1 other ends respectively with resistance R2, the RA1 pins of single-chip microcomputer It is connected, the other end ground connection of resistance R2;
Set of cells handover module consist of the first single channel relay, the 4th single channel relay, the first NPN type triode, Three NPN type triodes, the first diode, the 3rd diode, resistance R6, resistance R14;Concrete connected mode is the first NPN type three Pole pipe ground level is connected with resistance R6, and resistance R6 is connected with the RB4 pins of main controller module, the first NPN type triode emitter stage Ground connection, the first NPN type triode colelctor electrode is connected with 5 ends of the first single channel relay, 4 ends and 5 ends of the first single channel relay Meet the first diode IN1,1 end of the first single channel relay the first sampling resistor respectively with current detection module, resistance R9 connect Connect, 1 end of the first single channel relay is also connected with the resistance R1 with voltage detection module;2 ends of the first single channel relay and master Battery anode is connected, 2 ends of the first single channel relay and the 3rd of battery handover module in another Battery pack switch controller The 2 ends connection of single channel relay;3rd NPN type triode ground level is connected with resistance R14, resistance R14 and main controller module RB5 pins are connected, the 3rd NPN type triode grounded emitter, the 3rd NPN type triode colelctor electrode and the 4th single channel relay 5 ends are connected, and 4 ends of the 4th single channel relay and 5 terminate the 3rd diodes, and 1 end of the 4th single channel relay is examined respectively with electric current Survey the first sampling resistor of module, resistance R9 to be connected, 1 end of the 4th single channel relay also with the resistance R1 phases of voltage detection module Even;2 ends of the 4th single channel relay are connected with battery backup positive pole;2 ends of the 4th single channel relay and another Battery pack The 2 ends connection of the second single channel relay of battery handover module in switch controller.
The control method of described electric automobile energy managing device, including electric automobile run when discharge control method and Charge control method both of which after electric automobile is flame-out:
Pattern one, discharge control method when electric automobile runs, comprises the following steps:
Step 1, system electrification, main controller module will detect what is obtained by current detection module, voltage detection module The incoming single-chip microcomputer of voltage, current data, by calculating, when system judges dump energy in 10%-90%, Single-chip Controlling the Three single channel relays are turned on, and the first single channel relay, the 4th single channel relay, the second single channel relay disconnect, battery module In master battery pack it is in running order, battery backup be in off position;Persistently use master battery pack, and periodic sampling Main battery voltage, current signal, estimate its dump energy;It is less than when main controller module detects master battery pack dump energy 10%, battery backup dump energy in 10%-90%, into step 2;
Step 2, the second single channel relay conducting in Single-chip Controlling set of cells handover module, the first single channel relay, 3rd single channel relay, the 4th single channel relay disconnect, and so as to cut off master battery pack, enable battery backup;Battery backup In running order, master battery pack is in off position;Persistently use battery backup, and periodic sampling master battery pack electricity Pressure, current signal, estimate its dump energy;When main controller module detects master battery pack dump energy less than 10% and standby When set of cells dump energy is less than 10%, into step 3;
Step 3, single-chip microcomputer by control the first single channel relay of set of cells handover module, the 3rd single channel relay, the Four single channel relays, the second single channel relay disconnect, master battery pack, standby so as to cut off master battery pack, battery backup link Set of cells quits work.
Or, pattern two, charge control method after electric automobile is flame-out is comprised the following steps:
Step 1, system electrification, main controller module will be detected by detection current detection module, voltage detection module Voltage, the incoming single-chip microcomputer of current data, if the system determine that its dump energy is in 10%-90%, Single-chip Controlling set of cells The single channel relay conducting processed of handover module first, the 3rd single channel relay, the 4th single channel relay, the second single channel relay break Open, master battery pack 31 is in charged state, battery backup is in off position.Persistently master battery pack is charged, and the cycle Sampling main battery voltage, current signal, estimate its dump energy;When system detectio master battery pack dump energy is more than 90%, Battery backup carrying capacity in 10%-90%, into step 2;
Step 2, the 4th single channel relay conducting of Single-chip Controlling set of cells handover module, the first single channel relay, the Three single channel relays, the second single channel relay disconnect, and battery backup is in charged state, and master battery pack is in the shape that do not work State;Persistently battery backup is charged, and periodic sampling battery backup voltage, current signal, estimate its dump energy;Work as inspection When measuring detection master battery pack dump energy more than 90% and detecting that battery backup dump energy is more than 90%, into step 3;
Step 3, the first single channel relay, the 3rd single channel relay in Single-chip Controlling set of cells handover module, the 4th Single channel relay, the second single channel relay disconnect, and master battery pack, battery backup automatic charging are completed.
The beneficial effects of the utility model are:
This utility model provides a kind of electric automobile energy managing device, devises solaode, super capacitor and lithium Quick charge between ion battery, and two groups of lithium ion batteries quick charge and grouping charging and discharging control strategies under civil power, I.e. " the using and the reserved " control thought, preferably manages electric automobile energy system.The service efficiency of battery is improve, is preferably increased The service life of lithium ion battery is added.Specially:
1. the utility model proposes the energy conservation that uses cooperatively of a kind of " the using and the reserved " master battery pack and battery backup Device, the utility model proposes master battery pack and battery backup reasonably switch use range, controls cutting for two set of cells Use range is changed between the 10%-90% of its capacity, substantial amounts of experimental data shows battery during charging use, capacity Below 10% and rise to after 90%, the electricity to be charged into battery is very limited.During battery discharge use when After battery capacity is less than 10%, its capacity also can decline rapidly.Switching condition is set in addition and is also possible to prevent two Battery pack mistakes Infringement of the overdischarge to set of cells is filled, the extent of deterioration per Battery pack is reduced, its service life is greatly increased.Therefore we are two Its use range is controlled during Battery pack use between 10%-90%.
2. this utility model first uses in use main battery in two Battery packs, is then switched to battery backup, Two Battery pack cycle alternations are used cooperatively.Master battery pack is first filled during charging, state-of-charge 90% is charged to and is stopped charging, switched to Battery backup continues to charge, and charges to state-of-charge 90% and stops charging, and charging terminates.Master battery pack is first used during electric discharge, State-of-charge 10% is discharged to, battery backup electric discharge is switched to, state-of-charge 10% is discharged to and is stopped electric discharge, electric discharge terminates. Battery is made under this energy management apparatus and is switched fast experiment, master battery pack switches intermittent discharge curve and only uses master battery pack Continuous discharge curve comparison (such as Fig. 6) is organized, as can be seen from the figure master battery pack voltage step in handoff procedure rises, battery Energy also rises therewith, thus it is seen that the switching of two Battery packs using process with energy recovery process, master battery pack and standby Used with set of cells switching and realize 1+1>2 effect.
3. liang Battery pack is used cooperatively and can significantly improve its service efficiency.Its service efficiency it is several according to evidence from stack battery Switching is obtained using charge-discharge test.Can obtain from principle Fig. 5 battery availability factor.90% service efficiency refers specifically to master battery pack Charge to the electric discharge of capacity 30% or so to use, and so on circulate.In practical application, master battery pack charges to 90% electric discharge and makes With and so on circulating.Service efficiency is 68% or so.Directly charge to 90% using a Battery pack and put and a little use, it is such past Multiple circulation.Service efficiency is 60% or so.Service efficiency improves 8% or so.Battery backup service efficiency and master battery pack Service efficiency is close.
Description of the drawings
Fig. 1 is electric automobile energy management system main assembly block diagram;
Fig. 2 is the concrete connection figure in the periphery of main controller module 11;
Fig. 3 be the utility model proposes energy management system battery switching use flow chart;
Fig. 4 is the connection figure of two Battery pack switch controllers;
Fig. 5 is set of cells service efficiency figure;
Fig. 6 is that continuous use of set of cells is schemed with interrupted using discharging.
Specific embodiment
Fig. 1 is electric automobile energy management system main assembly block diagram.System composition include control main controller module 11, First relay unit 12, the second relay unit 13, the 3rd relay unit 14, too can battery module 15, super capacitor Module 16 and battery module 17;Wherein main controller module 11 respectively with the first relay unit 12, the second relay unit 13rd, the 3rd relay unit 14 is connected;First relay unit 12, solar battery group module 15, the second relay unit 13rd, super-capacitor module 16, the 3rd relay unit 14 and battery module 17 are sequentially connected.Main controller module 11 also with electricity Pond group module 17 is connected for detecting and switching set of cells.
The unit of the relay 12,13,14 is SRS4100 relays and its drive circuit composition, is known technology.
It is described too can battery module 15, composition includes solar panel and attached charging device, be it is commercially available known in Product.
Super-capacitor module 16 is super capacitor, specially the super capacitor of model spsscap, is commercially available known products.
When automobile is in halted state, equipment end quits work, the detection voltage detection module 21, electric current of master controller 11 The information of detection module 23.When meeting rechargeable solar battery condition, main controller module 11 controls the first relay unit 12 Connect solar panel to generate electricity;Simultaneously master controller 11 controls the second relay unit 13 and connects, and solaode is to super Electric capacity charges;When master controller 11 uses number according to the battery discharge end that voltage detection module 21, current detection module 23 are provided According to being judged, such as need to charge, connect the super capacitor of the 3rd relay unit 14 and charge to set of cells.
Described battery module 17 is constituted for two groups of separate master battery packs 31 and battery backup 32;
The composition of described main controller module 11 includes pic16f877 single-chip microcomputers and peripheral circuit composition (single-chip microcomputer Relevant pins be directly connected with the first relay unit 12, the second relay unit 13, the 3rd relay unit 14 respectively Connect), as shown in Fig. 2 it includes single-chip microcomputer, 2 Battery pack switch controllers, data-storing module 24, temperature control module 25, display mould Block 26, alarm module 27;Cut including 1 battery voltage sensing module, 21,1 set of cells per the composition of Battery pack switch controller Mold changing block 22 and 1 current detection module 23;Battery voltage sensing module 21, the detection of set of cells handover module 22, battery current Module 23, data-storing module 24, temperature control module 25, display module 26, alarm module 27 are with the corresponding pin phase of single-chip microcomputer Even, the wiring of voltage detection module and single-chip microcomputer has been drawn;In per Battery pack switch controller, current detection module 23 respectively with Set of cells handover module 22 is connected with voltage detection module 21, voltage detection module 21, set of cells handover module 22 respectively with master Set of cells 31, battery backup 32 are connected;Wherein, as the composition of charging end, in a Battery pack switch controller, cell voltage Detection module 21, battery current detection module 23 are connected respectively with charge controller module 41, used as filling for charging external equipment Electric controller module 41, is also connected with 220V civil powers, master battery pack 31, battery backup 32 respectively;And as the group of equipment end Into, in another Battery pack switch controller, battery voltage sensing module 21, battery current detection module 23 respectively with electrical equipment It is connected, electrical equipment is also connected with master battery pack 31, battery backup 32 respectively.
In use, for different situations, switching charging is used and electric discharge is used for battery module 17.Such as Fig. 2, will Charge and be summarized as charging end using part, electric discharge is summarized as into equipment end using part.In charging end, 11 points of main controller module It is not connected with voltage detection module 21, current detection module 23, set of cells handover module 22.For by voltage, current signal Control instruction is sent to set of cells handover module 22 by input main controller module 11, the module of master controller 11.In the same manner in equipment End, main controller module 11 is connected respectively with voltage detection module 21, current detection module 23, set of cells handover module 22. For by voltage, current signal input main controller module 11, control instruction to be sent to set of cells and is cut by the module of master controller 11 Mold changing block 22.So as to realize main controller module 11 to battery module 17 220v it is commercial power charged and electric discharge use when control And display, and control and display when using electrical equipment electric discharge.
Described charge controller 41 be commercially available well-known device, model GDY294020.
When running state of electric motor car is using wherein master battery pack 31, main controller module 11 is electric by current detection module 23 The pressure real-time monitoring of detection module 21 this Battery pack group voltage x current, and estimate its dump energy.It is not inconsistent when this Battery pack is detected When closing use condition, master controller sends instruction control battery handover module 22 and disconnects set of cells 31, while switching enables next Set of cells 32.When electric automobile is in halted state, main controller module 11 detects and estimates the state-of-charge of set of cells 31, when The connection of the control battery of main controller module 11 handover module 22 when meeting charge condition starts to be charged to set of cells 31, while prison in real time The voltage x current of set of cells 31, charging interval are surveyed, stops charging when detecting that set of cells meets full of condition, main controller module 11 control battery handover modules 22 switch to next set of cells, continue to charge.Until the fully charged electricity of two Battery packs.Master controller Module 11 sends control instruction and stops charging.
Single-chip microcomputer in main controller module 11 also respectively with data-storing module 24, temperature control module 25, display module 26, Alarm module 27 is connected.For the data storage to two Battery packs, temperature detection and battery status show and report to the police.The number It is commercially available known products according to memory module 24, temperature control module 25, the alarm module 27 of display module 26.
Fig. 3 be the utility model proposes the battery switching of energy management system use flow chart, specifically include following step Suddenly:
Initialization is carried out after system electrification and first determines whether whether battery enters charged state, if started to charge up, performed The charging interval of start recording set of cells, charging current, the voltage at battery two ends, by record data mastery routine is passed to, and is called Soc estimation programs, estimate set of cells dump energy.Judge whether current battery is up to standard, if without up to standard, entering and charging State, opens charging power mode.Next set of cells can be switched to if up to standard, until two pieces of batteries complete to charge.Such as Fruit does not enter into charged state, then system judges whether battery enters discharge condition, if starting electric discharge, performs start recording Battery power discharge time, discharge current, the voltage at battery two ends, and record data is passed to into mastery routine, call soc to estimate journey Sequence, estimates set of cells dump energy.Judge whether current battery is up to standard, if without up to standard, into discharge condition, opened Discharge mode.Next set of cells can be switched to if up to standard, until two pieces of battery power discharges terminate.
Fig. 4 be the connection figure of two Battery pack switch controllers, i.e. set of cells handover module 22, voltage detection module 21 and The circuit theory diagrams of current detection module 23.
Wherein current detection module 23 is consisted of:In charging end, the first chip * 6, resistance R7, resistance R9, the first sampling electricity Resistance * 3 is constituted, and the RG1 pins of the first chip * 6 are connected with one end of resistance R7, the other end of resistance R7 and the first sampling resistor * 3 It is connected, the RG2 pins of the first chip * 6 are connected with resistance R9, the other end of resistance R9 and the other end phases of the first sampling resistor * 3 Even, the other end of the first sampling resistor * 3 be also connected with 1 end of the first single channel relay * 1 of set of cells handover module 22 respectively, 1 end of the 4th single channel relay * 10, the resistance R1 of voltage detection module 23 are connected, the GND pin and SHDN of the first chip * 6 Pin is connected and is grounded;The OUT pins of the first chip * 6 are connected with the RA2 pins of single-chip microcomputer.First chip * 6 is MAX472 and phase Powered-down resistance is commercial devices.When a system is powered up collection current signal is coordinated by the first sampling resistor * 3 and the first chip * 6, Main controller module 11 to is sent the current signal of collection by OUT pins.In the same manner in equipment end, 23 groups of current detection module Into same with charging end.
Voltage detection module 21 is consisted of:In charging end, divider resistance R1, R2 composition, concrete connected mode is resistance R1 It is connected with 1 end of the first single channel relay * 1 of set of cells handover module 22 respectively, 1 end of the 3rd single channel relay * 2 is connected, Resistance R1 is also connected with the first sampling resistor resistance * 3, resistance R9 of current detection module 23 respectively, the R1 other ends respectively with electricity Resistance R2, the RA1 pins of single-chip microcomputer are connected, the other end ground connection of resistance R2.It is 10k Ω that R1 resistances are 5.1k Ω, R2 resistance.Together Reason is identical with charging end in equipment end voltage detection module 23.The resistance is commercial devices.(R1,2 meet U1, and U1 is voltage inspection Survey the interface of the external single-chip microcomputer of module).
Set of cells handover module 22 is consisted of in charging end, the first single channel relay * 1, the 4th single channel relay * 10, One NPN type triode * 7, the 3rd NPN type triode * 12, the first diode IN 1, the 3rd diode IN3, resistance R6, resistance R14, concrete connected mode are as described below, and the ground level of the first NPN type triode * 7 is connected with resistance R6, resistance R6 and master controller mould The RB4 pins of block 11 are connected, the grounded emitter of the first NPN type triode * 7, and the colelctor electrode of the first NPN type triode * 7 and first is singly 5 ends of road relay * 1 are connected, 4 ends of the first single channel relay * 1 and 5 termination the first diode IN1, the first single channel relay * 11 end is connected respectively with the first sampling resistor * 3, the resistance R9 of current detection module 23, and 1 end of the first single channel relay * 1 is also It is connected with the resistance R1 of voltage detection module 21.2 ends of the first single channel relay * 1 are connected with the positive pole of master battery pack 31, and first is single 2 ends of road relay * 1 and 2 ends of the 3rd single channel relay * 2 of battery handover module 22 in another Battery pack switch controller Connection.The ground level of 3rd NPN type triode * 12 is connected with resistance R14, the RB5 pin phases of resistance R14 and main controller module 11 Even, the grounded emitter of the 3rd NPN type triode * 12, the colelctor electrode of the 3rd NPN type triode * 12 and the 4th single channel relay *'s 10 5 ends are connected, the 1 end difference of 4 ends of the 4th single channel relay * 10 and 5 the 3rd diode IN3 of termination, the 4th single channel relay * 10 It is connected with the first sampling resistor * 3, the resistance R9 of current detection module 23,1 end of the 4th single channel relay * 10 is also examined with voltage The resistance R1 for surveying module 21 is connected.2 ends of the 4th single channel relay * 10 are connected with the positive pole of battery backup 32.4th single channel 2 ends of 2 ends of relay * 10 and the second single channel relay * 11 of battery handover module 22 in another Battery pack switch controller Connection.In the same manner, constitute essentially identical in equipment end set of cells handover module 22 and charging end.
Device other parts working condition in figure one and figure two simply to set of cells in civil power fill by this part of by the agency of Electric switch instances and the lower set of cells of car load operation switch the introduction of service condition.Whole device advantage:Propose a kind of electric automobile Energy management system, plans as a whole solar panel super capacitor and battery operation, particularly controls its charging process Process is used with the electric discharge of accumulator battery the using and the reserved.
The control method of described electric automobile energy managing device, including electric automobile run when discharge control method and Not charge control method both of which after electric automobile is flame-out (the switching service condition of accumulator does not do individually explanation):
After electric automobile is lighted a fire, system electrification, main controller module 11 is by 21 pieces of battery voltage detection mould and electricity Pond current detection module 23 gathers the magnitude of voltage and discharge current of currently used set of cells according to certain sampling period, if electric Pond group voltage is down to below rated voltage, then send sound and light alarm by alarm module 27, while in the screen of display module 26 It is upper to show related information, while adjusting battery module 17, close and work as master battery pack 31, battery backup 32 is opened, maintain Electric automobile runs well.Specifically switching mode is:
Pattern one, discharge control method when electric automobile runs, comprises the following steps:
Step 1, system electrification, main controller module 11 will be detected by current detection module 21, voltage detection module 22 The incoming single-chip microcomputer of voltage x current data for obtaining, by calculating, when system judges dump energy in 10%-90%, single-chip microcomputer Control the 3rd single channel relay * 2 to turn on, the first single channel relay * 1, the 4th single channel relay * 10, the second single channel relay * 11 Disconnect, the master battery pack 31 in battery module 17 is in running order, battery backup 32 is in off position;Persistently make With master battery pack 31, and the voltage of periodic sampling master battery pack 31, current signal, estimate its dump energy;Work as main controller module 11 detect the dump energy of master battery pack 31 less than 10%, the dump energy of battery backup 32 in 10%-90%, into step 2;
Step 2, the second single channel relay * 11 in Single-chip Controlling set of cells handover module is turned on, the first single channel relay Device * 1, the 3rd single channel relay * 2, the 4th single channel relay * 10 disconnect, and so as to cut off master battery pack 31, enable battery backup 32;Battery backup 32 is in running order, and master battery pack 31 is in off position;Battery backup 32 is persistently used, and The voltage of periodic sampling battery backup 32, current signal, estimate its dump energy;When main controller module 11 detects standby battery Group 31 dump energies less than 10% and the dump energy of battery backup 32 be less than 10% when, into step 3;
Step 3, Single-chip Controlling controls the first single channel relay * 1, the 3rd single channel relay * of set of cells handover module 2nd, the 4th single channel relay * 10, the second single channel relay * 11 disconnect, so as to cut off master battery pack 31, the chain of battery backup 32 Connect, master battery pack 31, battery backup 32 quit work.
After electric automobile is flame-out, master controller 11 detects whether that city is electrically accessed and charges for battery module 17.If not yet Have, detect whether to meet rechargeable solar battery condition, if meeting, main controller controls 11 control the first relay unit 12 Connect solar panel to start to generate electricity;Simultaneously master controller 11 controls the second relay unit 13 and connects, solaode to Super capacitor charges;When master controller 11 makes according to the battery discharge end that voltage detection module 21, current detection module 23 are provided Judged with data, such as need to charge, connected the super capacitor of the 3rd relay unit 14 and charge to set of cells.Until set of cells is filled Electricity is completed.Main controller module 11 controls the first relay unit 12, the second relay unit if detection detection city is electrically accessed 13rd, the 3rd relay unit 14 disconnects, while control set of cells handover module 22 carries out commercial power charged control to set of cells 17.
The concrete charging process of battery module 17 is as follows:
Or, pattern two, charge control method after electric automobile is flame-out is comprised the following steps:
Step 1, system electrification, main controller module 11 surveys the voltage detection module 22 of module 21 by detection electric current will detection The incoming single-chip microcomputer of voltage x current data for arriving, if the system determine that its dump energy is in 10%-90%, Single-chip Controlling set of cells The single channel relay * 1 processed of handover module 22 first is turned on, the 3rd single channel relay * 2, the 4th single channel relay * 10, the second single channel Relay * 11 disconnects, and master battery pack 31 is in charged state, and battery backup 32 is in off position.Persistently to main battery Group 31 charges, and the voltage of periodic sampling master battery pack 31, current signal, estimates its dump energy;When system detectio master battery pack 31 dump energies be more than 90%, the dump energy of battery backup 32 in 10%-90%, into step 2;
Step 2, the 4th single channel relay * 10 of Single-chip Controlling set of cells handover module 22 is turned on, the first single channel relay Device * 1, the 3rd single channel relay * 2, the second single channel relay * 11 disconnect, and battery backup 32 is in charged state, master battery pack 31 are in off position;Persistently set of cells 32 is charged, and the voltage of periodic sampling master battery pack 32, current signal, estimate it Dump energy;It is more than 90% and detects that the dump energy of battery backup 32 is more than when detection master battery pack 31 dump energy is detected When 90%, into step 3;
Step 3, the first single channel relay * 1 in Single-chip Controlling set of cells handover module 22, the 3rd single channel relay * 2nd, the 4th single channel relay * 10, the second single channel relay * 11 disconnect, and master battery pack 31, the automatic charging of battery backup 32 are complete Into.
Fig. 6 be the service efficiency figure of master battery pack 31, service efficiency be battery discharging during release capacity (energy) with The ratio of charging capacity (energy) needed for the state before electric discharge is returned to, service efficiency is calculated as follows:
Its ηeFor energy efficiency, CfDischarge capacity, CCFor charging capacity, IfFor discharge current, VfFor discharge voltage, IcTo fill Electric current, VcFor charging voltage.
Service efficiency can effectively represent ability to accept of the power battery pack to charging current, and electric energy during charging is mainly used In being converted into other irreversible losses such as heat energy for discharging in the chemical energy of battery and charging process.Service efficiency is higher, The part that the electric energy that expression is charged is converted into battery chemistries energy is more, and this portion of energy is only the energy being utilized in discharge process Amount.Using two Battery pack changing methods master battery pack 31 is being measured in its SOC 20%, 30%, 40%, 60%, 70%, 80% During state point, service efficiency is as shown in Figure 6.Its service efficiency has obvious improvement.
This utility model unaccomplished matter is known technology.

Claims (3)

1. a kind of electric automobile energy management system, it is characterized by system composition includes control main controller module, the first relay Device unit, the second relay unit, the 3rd relay unit, too can battery module, super-capacitor module and battery module; Wherein main controller module is connected respectively with the first relay unit, the second relay unit, the 3rd relay unit;First Relay unit, solar battery group module, the second relay unit, super-capacitor module, the 3rd relay unit and battery Group module is sequentially connected;Main controller module also with battery module;
First relay unit, the second relay unit, the 3rd relay unit include SRS4100 relays;
It is described too can battery module include solar panel;
Super-capacitor module is super capacitor;
Described battery module is two groups of separate master battery packs and battery backup;
The composition of described main controller module includes single-chip microcomputer.
2. electric automobile energy management system as claimed in claim 1, it is characterized by the composition of described main controller module For single-chip microcomputer, 2 Battery pack switch controllers, data-storing module, temperature control module, display module, alarm module;Cut per Battery pack The composition of changer controller includes 1 battery voltage sensing module, 1 set of cells handover module and 1 current detection module;Battery Voltage detection module, set of cells handover module, battery current detection module, data-storing module, temperature control module, display module, Alarm module is connected with the corresponding pin of single-chip microcomputer;In per Battery pack switch controller, current detection module respectively with battery Group handover module be connected with voltage detection module, voltage detection module, set of cells handover module respectively with master battery pack, standby electricity Pond group is connected;Wherein, as the composition of charging end, in a Battery pack switch controller, battery voltage sensing module, battery current Detection module is connected respectively with charge controller module, charge controller module also respectively with master battery pack, battery backup phase Even;And as the composition of equipment end, in another Battery pack switch controller, battery voltage sensing module, battery current detection mould Block is connected respectively with electrical equipment, and electrical equipment is also connected with master battery pack, battery backup respectively.
3. electric automobile energy management system as claimed in claim 2, the current detection module described in its feature consists of One chip, resistance R7, resistance R9, the first sampling resistor * 3;The RG1 pins of the first chip are connected with one end of resistance R7, resistance The other end of R7 is connected with the first sampling resistor, and the RG2 pins of the first chip are connected with resistance R9, the other end of resistance R9 and The other ends of one sampling resistor * 3 are connected, the other end of the first sampling resistor also respectively with the first single channel of set of cells handover module after The 1 end connection of electrical equipment, 1 end of the 4th single channel relay, the resistance R1 of voltage detection module are connected, and the GND of the first chip draws Foot is connected ground connection with SHDN pins;The OUT pins of the first chip are connected with the RA2 pins of single-chip microcomputer;
Described voltage detection module consists of divider resistance R1, R2, and concrete connected mode is cut respectively for resistance R1 with set of cells Mold changing block the first single channel relay 1 end connection, the 3rd single channel relay 1 end be connected, resistance R1 also respectively with electric current examine Survey the first sampling resistor resistance of module, resistance R9 to be connected, the R1 other ends are connected respectively with the RA1 pins of resistance R2, single-chip microcomputer Connect, the other end ground connection of resistance R2;
Set of cells handover module consists of the first single channel relay, the 4th single channel relay, the first NPN type triode, the 3rd NPN Type audion, the first diode, the 3rd diode, resistance R6, resistance R14;Concrete connected mode is the first NPN type triode base Level is connected with resistance R6, and resistance R6 is connected with the RB4 pins of main controller module, the first NPN type triode grounded emitter, the One NPN type triode colelctor electrode is connected with 5 ends of the first single channel relay, 4 ends and 5 ends of the first single channel relayConnectOne or two Pole pipe IN1,1 end of the first single channel relay the first sampling resistor respectively with current detection module, resistance R9 are connected, and first is single 1 end of road relay is also connected with the resistance R1 of voltage detection module;2 ends of the first single channel relay and master battery pack positive pole phase Even, 2 ends of the first single channel relay and 2 of the 3rd single channel relay of battery handover module in another Battery pack switch controller End connection;3rd NPN type triode ground level is connected with resistance R14, and resistance R14 is connected with the RB5 pins of main controller module, the Three NPN type triode grounded emitters, the 3rd NPN type triode colelctor electrode is connected with 5 ends of the 4th single channel relay, and the 4th is single 4 ends of road relay and 5 the 3rd diodes of termination, 1 end of the 4th single channel relay is adopted respectively with the first of current detection module Sample resistance, resistance R9 are connected, and 1 end of the 4th single channel relay is also connected with the resistance R1 of voltage detection module;4th single channel after 2 ends of electrical equipment are connected with battery backup positive pole;2 ends of the 4th single channel relay and electricity in another Battery pack switch controller The 2 ends connection of the second single channel relay of pond handover module.
CN201621260870.3U 2016-11-24 2016-11-24 Electric automobile energy management device Active CN206171232U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106476646A (en) * 2016-11-24 2017-03-08 河北工业大学 Electric automobile energy managing device
CN111509809A (en) * 2020-05-12 2020-08-07 安徽优旦科技有限公司 New energy battery management system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106476646A (en) * 2016-11-24 2017-03-08 河北工业大学 Electric automobile energy managing device
CN106476646B (en) * 2016-11-24 2018-08-31 河北工业大学 Electric automobile energy managing device
CN111509809A (en) * 2020-05-12 2020-08-07 安徽优旦科技有限公司 New energy battery management system

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