CN108146271A - A kind of normal normal electric battery of electric battery control system and lithium ion of lithium ion - Google Patents
A kind of normal normal electric battery of electric battery control system and lithium ion of lithium ion Download PDFInfo
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- CN108146271A CN108146271A CN201711398159.3A CN201711398159A CN108146271A CN 108146271 A CN108146271 A CN 108146271A CN 201711398159 A CN201711398159 A CN 201711398159A CN 108146271 A CN108146271 A CN 108146271A
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- lithium ion
- voltage
- discharge
- electric battery
- connect
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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
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
-
- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
- H01M50/24—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries from their environment, e.g. from corrosion
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- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using 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
-
- 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
- Y02T10/72—Electric energy management in electromobility
Abstract
The invention discloses a kind of normal electric battery control system of lithium ion, including lithium ion often electric battery cell control panel and two-way DC/DC converters and charge and discharge port；One end of two-way DC/DC converters is connect through charge and discharge port with vehicle-mounted DC/DC power supplys, and often electric battery cell control panel is connect the two-way DC/DC converters other end with lithium ion, and often often electric battery modules are connect electric battery cell control panel lithium ion with lithium ion；The two-way DC/DC converters, for vehicle-mounted DC power supply when detecting the input current from vehicle-mounted DC power supply, to be controlled to charge to the normal battery modules of lithium ion；Or when not detecting the input current from vehicle-mounted DC power supply, the normal battery modules electric discharge of control lithium ion.In addition, also disclose a kind of lithium ion often electric battery.Using the present invention, the energy is saved, improves the service life of often electric battery.
Description
Technical field
The present invention relates to a kind of normal battery of lithium electricity, often electric battery control system and lithium ion are normal for lithium ion in more particularly to one
Battery.
Background technology
Often inside battery only has protection board to the lithium electricity of the prior art, only has defencive function；Vehicle-mounted DC/DC electricity is not adjusted
The function of source output current and output voltage, far above lithium electricity, often battery expires piezoelectric voltage to vehicle-mounted DC/DC electric power output voltages, for a long time
Overvoltage can increase the probability of protection board damage, and leading to lithium electricity, often abnormal conditions occurs in battery；Under low temperature condition, high current is to lithium electricity
Normal battery charging can analyse lithium, cause the often irreversible damage of battery of lithium electricity.
At present, normal battery majority is configured on pure electric automobile as lead-acid battery, minority is the normal battery of lithium electricity；If equipped with lithium
Electric often battery needs to change vehicle-mounted DC/DC power supplys or adjustment vehicle low voltage wiring harness；So existing technology can not be realized constant
Under the premise of dynamic vehicle parts, the normal battery of plumbic acid is directly substituted for the normal battery of lithium electricity.
Invention content
It is an object of the invention to provide the normal normal electric batteries of electric battery control system and lithium ion of lithium ion, have saved the energy, have carried
The high utilization rate of the energy.
Of the existing technology to solve the problems, such as, the present invention provides a kind of lithium ion often electric battery control system, the system
Including：Lithium ion often electric battery cell control panel and two-way DC/DC converters and charge and discharge port；Two-way DC/DC converters
One end connect through charge and discharge port with vehicle-mounted DC/DC power supplys, the normal electric battery list of the two-way DC/DC converters other end and lithium ion
Body control panel connects, and often often electric battery modules are connect electric battery cell control panel lithium ion with lithium ion；
The two-way DC/DC converters, for when detecting the input current from vehicle-mounted DC power supply, controlling vehicle-mounted DC power supply
To the normal battery modules charging of lithium ion；Or when not detecting the input current from vehicle-mounted DC power supply, control lithium ion is normal
Battery modules are discharged.
The lithium ion of the technical program is often in electric battery powered control system using two-way DC/DC converters, using one
Component realizes the automatic switchover of charge and discharge mode simultaneously.
Preferably, the two-way DC/DC converters include：
Charge-discharge circuit；
Control of discharge unit, one end are connect with vehicle-mounted DC power supply, and the other end is connect with discharge circuit, for do not detect it is defeated
When entering electric current, control charge-discharge circuit conducting discharge portion makes lithium ion often electric battery discharge；Or detecting input current
When, control charge-discharge circuit disconnects discharge portion, and making lithium ion, often electric battery modules stop electric discharge；Control of discharge unit is according to being
It is no to detect input current often whether electric battery discharges to control lithium ion, when input current is not detected, at this time
Vehicle is in the state for stopping or formally starting not yet, and normal electric battery is needed to be powered to vehicle at this time, realizes normal electricity
The function of battery normal power supply；
Charging control unit, for when detecting that the input voltage from vehicle-mounted DC power supply is more than preset first threshold, controlling
Live part is connected in charge-discharge circuit processed, and is detecting the input voltage from vehicle-mounted DC power supply less than preset first threshold
When, control charge-discharge circuit disconnects live part, and making lithium ion, often electric battery modules stop charging；By input voltage with presetting
The judgement of threshold size may determine that vehicle normally starts operation, do not need to often electric battery at this time and be powered, therefore
It can be charged according to the charge condition of the normal electric battery of lithium ion to it, it is achieved thereby that the continuation of the journey of the normal electric battery of lithium ion.
Bidirectional DC/DC converter is internally provided with charge/discharge unit in the technical program, is charged and discharged the mould of pattern switching
Formula control unit and charging control unit.It is achieved thereby that the two-way function of bidirectional DC/DC.
Preferably, the control of discharge unit is additionally operable in discharge mode, by lithium ion often electric battery modules voltage with
Default maximum current threshold values is compared, if lithium ion when often electric battery modules are more than default maximum current threshold values,
Discharge loop is closed, electric current inspection is carried out again after shelving preset time interval, if electric current is still more than setting value, is continued
Close discharge loop；Conversely, opening discharge loop, continue to discharge.By to the normal electric battery power discharge electric current of lithium ion
Monitoring improves the security performance of often electric battery.
Preferably, the control of discharge unit includes：Chip U8, comparator U3A and photoelectrical coupler OP2 are controlled, it is described
The output terminal of control chip U8 is connect with the positive input of comparator U3A, reverse input end and the control chip of comparator U3A
The reference edge connection of U8, the output terminal of comparator U3A are connect with the cathode of the diode of photoelectrical coupler OP2, photoelectrical coupler
The collector of the triode of OP2 is connect with discharge circuit.
Preferably, the charging control unit includes：
Driving unit, for detect the input voltage from vehicle-mounted DC power supply be more than preset first threshold when, drive control
Unit；
Control unit for controlling the live part conducting of charge-discharge circuit under the driving of driving unit, makes lithium ion often electric
Battery modules charge.
Show lithium ion battery when the input voltage of vehicle-mounted DC power supply is more than preset first threshold in the technical program
Module needs to charge, and realizes that often electric battery capacity is replenished in time to lithium ion.
Preferably, the driving unit includes comparator U2B and the positive input of diode D11, U2B and vehicle-mounted DC electricity
Source connects, and the output terminal of U2B is connect with the cathode of diode D11, and the anode of diode D11 is connect with control unit.
Preferably, the two-way DC/DC converters further include：
Constant-current charge determination unit, in charging, input current signal to be converted to voltage signal, and by output voltage with
Preset second voltage value is compared, output comparison result to control unit；
Described control unit is additionally operable to, when output voltage is more than preset second voltage value, the reduction of charging circuit be controlled to lead
Passband rate；Or when output voltage is less than preset second voltage value, control charging circuit increase turn-on frequency；
Constant-voltage charge determination unit, for being led when the voltage of the normal electric battery modules of lithium ion reaches preset third voltage value
It is logical, and export constant-voltage charge signal to control unit.
Input current signal is converted to the voltage exported after voltage signal by the technical program, as two-way DC/DC transformation
The output voltage of device, in charging by the output voltage of two-way DC/DC converters and lithium ion often electric battery modules voltage into
Row compares, and realizes and carries out constant-current charge when the output voltage of two-way DC/DC converters is less than lithium ion battery module voltage,
Otherwise carry out constant-voltage charge.It is achieved thereby that by charging current limitation in controlled range, the often battery low temperature charging of lithium electricity is solved
Analyse lithium problem.
Preferably, the constant-current charge determination unit includes integrated control chip U9, comparator U2A, voltage-stabiliser tube U10, collection
Output terminal into control chip U9 is connect with the inverse output terminal of comparator U2A, and the positive input of comparator U2A is through voltage stabilizing
Pipe U10 is connect with vehicle-mounted DC power supply；
The constant-voltage charge determination unit includes voltage-stabiliser tube U5 and photoelectrical coupler OP1, the emitter-base bandgap grading of photoelectrical coupler OP1 triodes
It is connect with control unit, the cathode of the diode of photoelectrical coupler OP1 is connect with the cathode of voltage-stabiliser tube U5, the anode of voltage-stabiliser tube U5
It is connect with vehicle-mounted DC power supply, the collector of photoelectrical coupler OP1 is connect with low-tension supply, and photoelectrical coupler OP1 diodes are just
Often electric battery is connect with lithium ion for pole.
Preferably, the two-way DC/DC converters further include：Under-voltage protection unit, connect with discharge circuit, for putting
By lithium ion, often electric battery modules voltage is compared with default minimum voltage threshold values when electric, if the normal electricity battery mould of lithium ion
When group is less than or equal to default minimum voltage threshold values, discharge loop is closed, making lithium ion, often electric battery modules stop electric discharge；
The under-voltage protection unit, including comparator U4A, comparator U4A positive inputs are connect with low-tension supply, are reversely inputted
End is preset with minimum voltage threshold values, and output terminal is connect with discharge circuit.
The technical program improves the security performance of product by under-voltage protection unit.
Preferably, the two-way DC/DC converters further include：
Over-temperature protection unit：One end is connect with the normal battery modules of inner ion, and the other end is connect with charge-discharge circuit；For lithium ion
Often in charge and discharge, by lithium ion, often electric battery modules temperature compares electricity battery modules with default maximum temperature threshold
Compared with if often electric battery modules temperature is more than setting value, charge closing or discharge loop to lithium ion；Treat temperature be down to recovery value with
When lower, it is again turned on charge or discharge circuit；
The over-temperature protection unit includes comparator U4B, comparator U4B reverse input ends connection low-tension supply, positive input
Often electric battery modules are connect with lithium ion, and output terminal is connect with charge-discharge circuit.
The technical program realizes the control to temperature by the setting of over-temperature protection unit, improves the safety of product
Energy.
Correspondingly, the present invention also provides a kind of lithium ion, often electric battery, the normal electric battery include battery box, electric appliance peace
Lid, lithium ion battery module and control system are loaded onto, the battery box and electric mounting upper cover form closed space, institute
It states lithium ion battery module to connect with control system, the lithium ion battery module and set-up of control system are in battery box and electricity
In the confined space that device installation upper cover is formed；The control system is the control system described in claim 1-9.
The normal electric battery of lithium ion in the technical program improves the water resistance of product by the confined space of formation,
Carrying out control to lithium ion battery module additionally by control system realizes the charge and discharge and charging of lithium ion battery module
With the seamless switching of electric discharge, the promptness powered to vehicle low voltage equipment is improved.
Often electric battery powered control system uses two-way DC/DC converters, while realize charging to the lithium ion of the present invention
With electric discharge both of which, and the automatic switchover of charge and discharge mode is realized.
Description of the drawings
Fig. 1 is a kind of schematic diagram of the normal electric battery control system of lithium ion of the present invention；
Fig. 2 is the schematic diagram of the normal electric battery of lithium ion in a kind of normal electric control system of lithium ion of the present invention；
Fig. 3 is the explosive view of Fig. 2；
Fig. 4 is a kind of schematic diagram of embodiment of two-way DC/DC converters in a kind of normal electric control system of lithium ion of the present invention；
Fig. 5 is a kind of two-way DC/DC converter circuits principle schematic of the normal electric control system of lithium ion of the present invention.
In figure:
100. vehicle power battery, 200. vehicle-mounted DC/DC power supplys, 300. lithium ions often pacify by electric battery, 1. battery box, 2. electric appliances
Load onto lid, 3. battery modules, 4. bidirectional DC/DC converters, 5. single battery control panels, 21. positive terminals, 22. negative terminals
Column, 31. echelons using battery core, 32. pinboards, 41. charge-discharge circuits, 42. control of discharge units, 43. charging control units,
44. under-voltage protection unit, 45. over-temperature protection units, 431. driving units, 432. control units, 433. constant-current charges determine list
Member, 434. constant-voltage charge determination units.
Specific embodiment
As shown in Figs. 1-5, which includes：Vehicle power battery 100, often electricity is electric for vehicle-mounted DC/DC power supplys 200, lithium ion
Pond 300.Wherein, vehicle power battery 100 is connect with vehicle-mounted DC/DC power supplys 200, and vehicle-mounted DC/DC power supplys 200 are through charge and discharge port
Often electric battery 300 is connect with lithium ion.
The normal electric battery 300 of lithium ion, including battery box 1, electric mounting upper cover 2, lithium ion battery module 3, two-way
Dcdc converter 4 and single battery control panel 5, battery box and electric mounting upper cover form the box body of closing, lithium ion battery
Module 3 is connect with electric mounting upper cover 2, and lithium ion battery module 3 is set to what battery box 1 was formed with electric mounting upper cover 2
In enclosed box body, DCDC power supplys installation 4 and single battery control panel are mounted in electric mounting upper cover 2.
Battery box 1 is tightly connected with electric mounting upper cover, during specific implementation, glue bonding may be used, prevent battery
Inner inlet.In addition, the fence of battery box in-discard lead-acid battery cassette interior, so as to the ladder of compatible different size
It is secondary to utilize lithium battery.It, can be with lead-acid battery used for electric vehicle widely used at present from the overall dimensions of battery box
Shell sizes are standard, so as to which the size for alloing battery box is compatible with the size of lead-acid battery.
Electric mounting upper cover 2 is provided with positive terminal 21 and negative terminal 22.In addition, it can also be reserved on lid
Screw hole position, so as to which all battery lines are integrated component inside upper cover.
Lithium ion battery module 3 utilizes battery core 31, multiple isolation sponges including multiple echelons（It is not indicated in figure）And switching
Plate 32, isolation sponge are set to adjacent echelon using between lithium electricity battery core, and pinboard one end is connect with battery core, pinboard it is another
One end is connect by conducting wire with bidirectional DC/DC converter 4.From the angle of INSULATION DESIGN, between the battery core of the technical program
Interval heat-preservation cotton can be used to be kept the temperature, so as to improve the heat insulating ability between battery core, in addition the periphery of battery modules can also
It is isolated using heat-preservation cotton and is kept the temperature.So as to improve the heat-insulating property of entire battery.
Two-way DC/DC converters（Two-way DC/DC is shown as in figure）4, two-way DC/DC modules are responsible for the normal battery of lithium ion
Charge and discharge are set in battery box and the confined space of electric mounting upper cover formation.One end connects with lithium ion battery module
It connects, the other end is connect with charge and discharge port.
Two-way DC/DC converters 4 include:It is charge-discharge circuit 41, control of discharge unit 42, charging control unit 43, under-voltage
Protection location 44, over-temperature protection unit 45；It is true that charging control unit includes driving unit 431, control unit 432, constant-current charge
Order member 433, constant-voltage charge determination unit 434.Wherein, the discharge portion of control of discharge unit and charge-discharge circuit connects, and fills
The live part of electric control unit and charge-discharge circuit connects.
Control of discharge unit 42, one end are connect with vehicle-mounted DC power supply, and the other end is connect with discharge circuit, for not examining
When measuring input current, control charge-discharge circuit conducting discharge portion makes lithium ion often electric battery discharge；It is or defeated having detected
When entering electric current, control charge-discharge circuit disconnects discharge portion, and making lithium ion, often electric battery modules stop electric discharge.During specific implementation,
As shown in figure 5, control of discharge unit 42 includes control chip U8, comparator U3A and photoelectrical coupler OP2, the control chip
The output terminal of U8 is connect with the positive input of comparator U3A, the reference of the reverse input end and control chip U8 of comparator U3A
End connection, the output terminal of comparator U3A are connect with the cathode of the diode of photoelectrical coupler OP2, three poles of photoelectrical coupler OP2
The collector of pipe is connect with discharge circuit.In addition, control of discharge unit can be additionally used in flow control, that is, realize the work of overcurrent protection
With.
Charging control unit 43, for detect the input voltage from vehicle-mounted DC power supply be more than preset threshold value when,
Charge-discharge circuit conducting live part is controlled, and when detecting that the input voltage from vehicle-mounted DC power supply is less than predetermined threshold value,
Charge-discharge circuit is controlled to disconnect live part, making lithium ion, often electric battery modules stop charging.It is single to include driving during specific implementation
Member 431 and control unit 432, wherein, as shown in figure 5, driving unit 421 includes comparator U2B and diode D11, comparator
The positive input of U2B is connect with vehicle-mounted DC power supply, and the output terminal of comparator U2B is connect with the cathode of diode D11, diode
The anode of D11 is connect with control unit.Control unit 432 is using control chip U1.
Constant-current charge determination unit 431, for for charging when, input current signal is converted into voltage signal, and
Output voltage and preset second voltage value are compared, output comparison result is to control unit, and described control unit is defeated
When going out voltage more than preset second voltage value, the reduction turn-on frequency of charging circuit is controlled；Or it is less than in output voltage default
Second voltage value when, control charging circuit increase turn-on frequency；Wherein, second voltage value can be set according to actual conditions
It is fixed, such as second voltage can be set as 2.5V.During specific implementation, as shown in figure 5, the constant-current charge determination unit 433 is wrapped
Include integrated control chip U9, comparator U2A, voltage-stabiliser tube U10, the output terminal of integrated control chip U9 is reversed with comparator U2A's
Output terminal connects, and the positive input of comparator U2A is connect through voltage-stabiliser tube U10 with vehicle-mounted DC power supply；
Constant-voltage charge determination unit 434, for when the voltage of the normal electric battery modules of lithium ion reaches preset third voltage value
Conducting, and export constant-voltage charge signal to control unit.Wherein, third voltage value can be set according to actual needs, such as the
Three voltage values are set as 12.3V.During specific implementation, as shown in figure 5, the constant-voltage charge determination unit includes voltage-stabiliser tube U5 and photoelectricity
Coupler OP1, the emitter-base bandgap grading of photoelectrical coupler OP1 triodes are connect with control unit, the cathode of the diode of photoelectrical coupler OP1
Connect with the cathode of voltage-stabiliser tube U5, the anode of voltage-stabiliser tube U5 is connect with vehicle-mounted DC power supply, the collector of photoelectrical coupler OP1 with it is low
Voltage source connects, and often electric battery is connect for anode and the lithium ion of photoelectrical coupler OP1 diodes.
Under-voltage protection unit 44, in discharge mode, by lithium ion often electric battery modules voltage with default most
Low-voltage threshold values is compared, if lithium ion, when often electric battery modules are less than or equal to default minimum voltage threshold values, closing is put
Electrical circuit, making lithium ion, often electric battery modules stop electric discharge；During specific implementation, as shown in figure 5, the under-voltage protection unit, including
Comparator U4A, comparator U4A positive inputs are connect with low-tension supply, and reverse input end is preset with minimum voltage threshold values, output
End is connect with discharge circuit.
Over-temperature protection unit 45, for lithium ion, often electric battery modules are in charge and discharge, by the normal electric battery modules of lithium ion
Temperature is compared with default maximum temperature threshold, if often electric battery modules temperature is more than setting value to lithium ion, is closed
Charge or discharge circuit；When temperature is down to below recovery value, it is again turned on charge or discharge circuit；During specific implementation, such as Fig. 5
It is shown, the over-temperature protection unit include comparator U4B, comparator U4B reverse input ends connection low-tension supply, positive input with
Often electric battery modules connection, output terminal are connect lithium ion with discharge circuit.
In addition, charge-discharge circuit 41 includes live part circuit and discharge portion circuit, wherein live part circuit includes
The switching circuit of metal-oxide-semiconductor M1 and metal-oxide-semiconductor M2, discharge portion circuit are the switching circuits for including metal-oxide-semiconductor M3 and metal-oxide-semiconductor M4.
The specific work process of 5 pairs of embodiment of the present invention illustrates below in conjunction with the accompanying drawings.
Discharge mode：
Lithium battery voltage is in range of normal value（10-12.3V）When, M3 is held on.When U8 detects no charging current, U8 letters
Number 6 foot output HIGH voltage of output terminal to 3 feet of U3A and 6 feet of U3B, at this time U3A 3 foot voltage ＞, 2 foot default voltages,
So the 1 foot output HIGH voltage of U3A, the optocoupler of OP2 can not be connected, 4 feet and 6 feet of OP2 are not turned on；Lithium battery group passes through R30
It powers to metal-oxide-semiconductor M4, M4 conductings；Often electric battery is in discharge mode to lithium ion.
Under-voltage protection：
In discharge mode during discharge current≤10A setting values, M3 and M4 are held on, and battery can discharge for a long time, Zhi Dao electricity
Cell voltage drops to protection voltage value, 3 feet of U4A（Lithium battery voltage）Less than 2 foot default threshold values（10V）When, the output of 1 foot
The grid voltage of M3 is pulled low to 0V by low-voltage signal by R16 and R22, and battery protection metal-oxide-semiconductor M3 shutdowns stop electric discharge.
Overcurrent protection：
U8 detects discharge current in discharge mode, becomes larger the 6 proportional increase of foot output voltage of U8 output terminals with electric current；Discharge current
During ＞ 60A setting values, 6 foot output voltages are more than the 5 foot voltages of U3B, and the 7 feet output low-voltage of U3B, CTRL3 is by R22 by M3
Grid voltage be pulled to 0V, battery protection metal-oxide-semiconductor M3 shutdowns stop electric discharge.
Overheat protector：
The voltage signal of temperature sensor is exported to 6 feet of U4B, and when 6 foot ＞, 5 foot default voltages, 7 foot low pressure pass through
The grid voltage of M3 is pulled low to 0V by R22, and battery protection metal-oxide-semiconductor M3 shutdowns stop charge and discharge.
Charge mode：
When vehicle-mounted DC power supply has output, by this voltage output to 5 feet of U2B, 5 foot voltage ＞, 6 foot default threshold voltages
（12.5V）When, the 7 foot output HIGH voltages of U2B, D11 is not turned on, and the 8 foot voltages of U1 rise, and U1 starts to work；
U8 detects charging current simultaneously, and signal is exported to 3 feet of U3A, and 2 foot voltage ＞, 3 feet, 1 foot export low electricity at this time
Signal, optocoupler conducting, 4 feet of OP2 and the conducting of 6 feet are pressed, M4 grid voltages are pulled to by 0V by R45, battery protection metal-oxide-semiconductor M4 is closed
It is disconnected, stop electric discharge；
U1 controls M1, M2 alternate conduction starts to charge up, and L1 and D4 carry out vehicle-mounted DC output voltage to be depressurized to 12.3V, while U9
By the current value of Rcs2, current signal is converted to voltage signal and is exported by 5 feet to 2 feet of U2A by U9 for detection, and U2A is by 2 feet
With 3 foot default values（2.5V）It is compared, during 2 foot ＞, 3 foot voltages, 1 foot exports 8 feet of the low voltage signal to U1, U1 roots
Signal reduces the turn-on time of M1 and M2 accordingly, it is ensured that is charged with constant current to lithium battery；When 2 foot voltage 3 feet of ＜, 1 foot
Output HIGH voltage signal to U1 8 feet, U1 according to this signal increase M1 and M2 turn-on time, it is ensured that with constant current give lithium electricity
It charges in pond；When lithium battery voltage reaches 12.3V, U5 conductings, the optocoupler conducting of OP1,4 feet of OP1 and the conducting of 6 feet at this time will
This signal is sent to 1 foot of U1, and U1 reduces the turn-on time of M1 and M2, while output is stablized in 12.3V, reduces charging electricity
Stream makes lithium battery enter constant-voltage phase charging.
Charging relays power mode：
As vehicle-mounted output voltage ＜ 12.5V, 5 foot voltage ＜, 6 feet of U2B, 7 feet output low voltage signal, D11 conductings, by U1
8 feet be pulled low to 0V, U1 is stopped, and turns off M1 and M2, stop charging；U8 detections simultaneously are without charging current, according to electric discharge
Pattern carries out control M4 and opens, and lithium battery enters discharge mode.
Illustrate another aspect of the present invention below.
Often electric battery control charge/discharge control method, this method include a kind of lithium ion：
Step S1, two-way DC/DC converters when detecting the input current from vehicle-mounted DC power supply, control vehicle-mounted DC power supply to
Lithium ion battery module charges；
Step S2, two-way DC/DC converters control lithium-ion electric when not detecting the input current from vehicle-mounted DC power supply
Pond module electric discharge.
Wherein step s1 can also specifically include：
Step S11, when detecting that the input voltage from vehicle-mounted DC power supply is more than preset first threshold, drive control unit
It works；During specific implementation, which can be 12.5V;
Step S12 controls the live part of charge-discharge circuit to be connected；
Input current signal is converted to voltage signal, and transformed output voltage and preset lithium ion is normal by step S13
The voltage threshold of electric battery modules is compared, if output voltage is more than the voltage threshold of the normal electric battery modules of preset lithium ion
Value, then to control unit output constant-voltage charge control signal；If output voltage is less than preset second voltage threshold value, to control
Unit output constant current charging control signal；
Step S14, when output voltage reaches preset second threshold, output constant-voltage charge control signal.
In addition, it further includes;
The step of overcurrent protection：In discharge mode, by lithium ion often electric battery modules voltage and default maximum current valve
Value is compared, if lithium ion when often electric battery modules are more than default maximum current threshold values, are closed discharge loop, shelved pre-
If time interval after carry out electric current inspection again, if electric current still be more than setting value, continue close discharge loop；Conversely,
Discharge loop is opened, continues to discharge.
The step of overheat protector：Often electric battery modules are in charge and discharge for lithium ion, by the normal electric battery modules temperature of lithium ion
It is compared with default maximum temperature threshold, if often electric battery modules temperature is more than setting value, charge closing to lithium ion
Or discharge loop；When temperature is down to below recovery value, it is again turned on charge or discharge circuit.
The step of under-voltage protection：In electric discharge by lithium ion often electric battery modules voltage and default minimum voltage threshold values
It is compared, if lithium ion when often electric battery modules are less than or equal to default minimum voltage threshold values, close discharge loop, makes lithium
Often electric battery modules stop electric discharge to ion.
The above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also considered as
Protection scope of the present invention.
Claims (10)
1. the normal electric battery control system of a kind of lithium ion, which is characterized in that including the normal electric battery cell control panel and double of lithium ion
To DC/DC converters and charge and discharge port；One end of two-way DC/DC converters is through charge and discharge port and vehicle-mounted DC/DC power supplys
Connection, often electric battery cell control panel is connect the two-way DC/DC converters other end with lithium ion, lithium ion often electric battery cell control
Often electric battery modules are connect with lithium ion for making sheet；
The two-way DC/DC converters, for when detecting the input current from vehicle-mounted DC power supply, controlling vehicle-mounted DC power supply
To the normal battery modules charging of lithium ion；Or when not detecting the input current from vehicle-mounted DC power supply, control lithium ion is normal
Battery modules are discharged.
2. the normal electric battery control system of lithium ion according to claim 1, which is characterized in that the two-way DC/DC transformation
Device includes：
Charge-discharge circuit；
Control of discharge unit, one end are connect with vehicle-mounted DC power supply, and the other end is connect with discharge circuit, for do not detect it is defeated
When entering electric current, control charge-discharge circuit conducting discharge portion makes lithium ion often electric battery discharge；Or detecting input current
When, control charge-discharge circuit disconnects discharge portion, and making lithium ion, often electric battery modules stop electric discharge；
Charging control unit, for when detecting that the input voltage from vehicle-mounted DC power supply is more than preset first threshold, controlling
Live part is connected in charge-discharge circuit processed, and is detecting the input voltage from vehicle-mounted DC power supply less than preset first threshold
When, control charge-discharge circuit disconnects live part, and making lithium ion, often electric battery modules stop charging.
3. the normal electric battery control system of lithium ion according to claim 2, which is characterized in that the control of discharge unit,
It is additionally operable in discharge mode, by lithium ion, often electric battery modules electric current is compared with default maximum current threshold values, if
Lithium ion closes discharge loop, shelves preset time interval when often electric battery modules are more than default maximum current threshold values
It carries out electric current inspection again afterwards, if electric current is still more than setting value, continues to close discharge loop；Conversely, discharge loop is opened,
Continue to discharge.
4. the normal electric battery control system of lithium ion according to claim 2, which is characterized in that the control of discharge unit packet
It includes：Control the output terminal and comparator U3A of chip U8, comparator U3A and photoelectrical coupler OP2, the control chip U8 just
It is connected to input terminal, the reverse input end of comparator U3A is with controlling the reference edge of chip U8 to connect, the output terminal of comparator U3A
It is connect with the cathode of the diode of photoelectrical coupler OP2, collector and the discharge circuit of the triode of photoelectrical coupler OP2 connect
It connects.
5. the normal electric battery control system of lithium ion according to claim 2, which is characterized in that the charging control unit packet
It includes：
Driving unit, for detect the input voltage from vehicle-mounted DC power supply be more than preset first threshold when（12.5V）, drive
Dynamic control unit；
Control unit for controlling the live part conducting of charge-discharge circuit under the driving of driving unit, makes lithium ion often electric
Battery modules charge.
6. the normal electric battery control system of lithium ion according to claim 5, which is characterized in that the driving unit include than
Positive input compared with device U2B and diode D11, U2B is connect with vehicle-mounted DC power supply, the output terminal of U2B and bearing for diode D11
Pole connects, and the anode of diode D11 is connect with control unit.
7. the normal electric battery control system of lithium ion according to claim 2, which is characterized in that the charging control unit is also
Including：
Constant-current charge determination unit, in charging, input current signal to be converted to voltage signal, and by output voltage with
Preset second voltage value（2.5V）It is compared, output comparison result to described control unit；
Described control unit is additionally operable to, when output voltage is more than preset second voltage value, the reduction of charging circuit be controlled to lead
Passband rate；Or when output voltage is less than preset second voltage value, control charging circuit increase turn-on frequency；
Constant-voltage charge determination unit, for reaching preset third voltage value in the voltage of the normal electric battery modules of lithium ion
（12.3V）When be connected, and to control unit export constant-voltage charge signal.
8. the normal electric battery control system of lithium ion according to claim 7, which is characterized in that the constant-current charge determines list
Member includes the output terminal of integrated control chip U9, comparator U2A, voltage-stabiliser tube U10, integrated control chip U9 with comparator U2A's
Inverse output terminal connects, and the positive input of comparator U2A is connect through voltage-stabiliser tube U10 with vehicle-mounted DC power supply；
The constant-voltage charge determination unit includes voltage-stabiliser tube U5 and photoelectrical coupler OP1, the emitter-base bandgap grading of photoelectrical coupler OP1 triodes
It is connect with control unit, the cathode of the diode of photoelectrical coupler OP1 is connect with the cathode of voltage-stabiliser tube U5, the anode of voltage-stabiliser tube U5
It is connect with vehicle-mounted DC power supply, the collector of photoelectrical coupler OP1 is connect with low-tension supply, and photoelectrical coupler OP1 diodes are just
Often electric battery is connect with lithium ion for pole.
9. the normal electric battery control system of lithium ion according to claim 1, which is characterized in that the two-way DC/DC transformation
Device further includes：Under-voltage protection unit, connect with discharge circuit, in electric discharge by lithium ion often electric battery modules voltage with being
System setting minimum voltage threshold values is compared, if often electric battery modules are less than or equal to default minimum voltage threshold values to lithium ion
When, discharge loop is closed, making lithium ion, often electric battery modules stop electric discharge；
The under-voltage protection unit, including comparator U4A, comparator U4A positive inputs are connect with low-tension supply, are reversely inputted
End is preset with minimum voltage threshold values, and output terminal is connect with discharge circuit.
10. the normal electric battery of a kind of lithium ion, which is characterized in that including battery box, electric mounting upper cover, lithium ion battery module
And control system, the battery box and electric mounting upper cover form closed space, the lithium ion battery module and control
System connection processed, the lithium ion battery module and set-up of control system form closed in battery box and electric mounting upper cover
In space；The control system is the control system described in claim 1-9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711398159.3A CN108146271A (en) | 2017-12-21 | 2017-12-21 | A kind of normal normal electric battery of electric battery control system and lithium ion of lithium ion |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711398159.3A CN108146271A (en) | 2017-12-21 | 2017-12-21 | A kind of normal normal electric battery of electric battery control system and lithium ion of lithium ion |
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Application publication date: 20180612 |